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Description: 基于Verilog-HDL的硬件电路的实现
9.7 步进电机的控制
9.7.1 步进电机驱动的逻辑符号
9.7.2 步进电机驱动的时序图
9.7.3 步进电机驱动的逻辑框图
9.7.4 计数模块的设计与实现
9.7.5 译码模块的设计与实现
9.7.6 步进电机驱动的Verilog-HDL描述
9.7.7 编译指令-\"宏替换`define\"的使用方法
9.7.8 编译指令-\"时间尺度`timescale\"的使用方法
9.7.9 系统任务-\"$finish\"的使用方法
9.7.10 步进电机驱动的硬件实现
-based on Verilog-HDL hardware Circuit of 9.7 Stepper Motor Control 9.7 .1 stepper motor-driven logic symbols 9.7.2 stepper motor driven map the chronology -- Step 9.7.3 Machine-driven logic diagram 9.7.4 Counting Module Design and Implementation 9.7.5 decoding module design and Implementation 9.7.6 stepper motor driven Verilog-HDL Compiler means locale 9.7.7 Description Order - "macro substitution` define "the use 9.7.8 compiler directives -" The time scale `tim escale "use 9.7.9 system tasks -" $ finish "to use 9.7.10 stepper motor drive hardware
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Size: 2523 |
Author: 宁宁 |
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Description: 迄今为止见过的最方便的huffman编码，效率很高
一个外国人写的，很具有研究价值
Constructing a Huffman Tree according to the number of times each symbol appears in the data stream:
1) Create an array of N nodes, representing N possible symbols (ranging between 0 and N-1).
2) Set the value of each node to the number of times that its symbol appears in the data stream.
3) Create a Minimum-Heap of N nodes.
4) Add every node whose value is greater than zero to the heap.
5) Extract the best two nodes in the heap.
6) Create a parent node whose children are the two extracted nodes.
7) Add the parent node to the heap.
8) Repeat the previous three steps N-1 times (until only 1 node remains in the heap).
9) Extract the last node in the heap.
The array created in the first step stores the leaves of the tree, and is used in order to encode the data stream.
The node extracted in the last step is in fact the root of the tree, and is used in order to decode the data stream.
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Size: 17786 |
Author: 游弋人生 |
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Description: 1 Boneh-Franlin的IBE算法主要由四个子算法组成：Setup，Extract，Encrypt和Decrypt，分别完成系统参数建立、密钥提取、加密和解密的功能。假定消息的明文空间为 ，密文空间 。
(1)、建立: 给定一个安全参数 k蝂+
Step 1: 执行G生成一个素数q， 两个q阶群G1， G2 ， 和一个可用的双线性映射 ê: G1碐1瓽2。 此外选取G1 任一生成元 P蜧1，再选取两个HASH函数 H3:{ 0， 1}n×{0， 1}n。 -?， H4:。 :{ 0， 1}n鄘0， 1}n
Setp 2: 随机选取一个 s? 令 Ppub=sP。
Step 3: 选择两个算法函数， H1: {0， 1}*?， H2: G2畕0， 1}n 。(对于安全验证，将所有的散列函数看作是随机的数据系统)。 消息空间为M= {0， 1}n。 密文空间为 C = 磠0， 1}n。 输出系统参数为 p = {q， G1， G2， ê， n， P， Ppub， H1， H2 H3， H4，}。 主密钥为 s?。
(2)、提取: 对于一个给定的字符串 Id蝱0， 1}* 算法如下:
Step 4: 计算 QId = H1(Id) ?。
Step 5: 设私钥为 SId 则 SId = (QId)s 其中s为主密钥。
(3)、加密: 利用公钥 Id加密m蜯 算法如下:
Step 6: 计算 QId = H1(Id) ?。
Step 7: 选择一个随机数 σ?。
Step 8: 设r= H3 (σ，m)
Step 9:建立密文为:c=
(4)、解密: 令c = 为用公钥加密的密文。如果U不属于 ，则拒绝该密文， 使用私钥要解密 SId? :
Step 10:计算σ=V臜2(ê(SId， U))
Step 11:得出m=W H4 (σ)
Step 12:设r = H3 (σ，m)，验证U与rσ是否相等，如果不等则拒绝。
由上述算法的一般形式可以看出，基本的基于身份的广播加密机制，在解密时需要解一个n个变量的线性方程组（n为用户的数目），虽然有相对有效的方法解方程组但是对于WSN中的节点来说，需要的存储空间和计算量都太大，不适合。
针对上述问题提出了改进的基于身份的广播加密机制[17]。改进的算法不需要解方程组，它基于数学变换利用双线性的特性，在解密时只需要节点自己的私钥和已知的其他节点的公钥即可。采用了IBE算法的简要版本（simple）使用两个hash函数。对于改进基于身份认证的组播认证机制不需要解决任何的线性系统的方程和没有复杂的操作，更适用于计算和存储等能力都受限制的无线传感网络。
2 IBE算法性能分析
2.1 算法安全性
不管对于传统网络还是无线传感器网络，密钥管理方案的安全性都是首要考虑的因素，包括保密性、完整性、有效性等。
现在我们就来分析一下上述IBE算法的安全性。基于椭圆曲线的IBE算法的安全性依赖于给定P和rP条件下计算出r的难度，即求解椭圆曲线对数问题的时间复杂性。节点对明文加密后，将密文连同rP一起发出。解密密文时，当节点正常接收，只要用私钥dID经过计算就可以得到明文；当信息被攻击节点截取时，由于缺少私钥dID，攻击节点要算出密钥只能沿用发送节点的公式： ，假设攻击节点可以知道公钥QId和系统参数P和Ps，同时rP也是连同密文一起发送的，因此只要由P和rP解出发送节点选择的r，就可以得到gID。但是，解出r是几乎不可能的，所以IBE的安全性很高。
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Author: michelle.yaer@163.com |
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Description: Drag and Drop Component Suite Version 4.1 Field test 5, released 16-dec-2001 ?1997-2001 Angus Johnson & Anders Melander http://www.melander.dk/delphi/dragdrop/ ------------------------------------------- Table of Contents: ------------------------------------------- 1. Supported platforms 2. Installation 3. Getting started 4. Known problems 5. Support and feedback 6. Bug reports 7. Upgrades and bug fixes 8. Missing in this release 9. New in version 4.x 10. TODO 11. Licence, Copyright and Disclaimer 12. Release history ------------------------------------------- 1. Supported platforms: ------------------------------------------- This release supports Delphi 4-6 and C++ Builder 4-5. Earlier versions of Delphi and C++ Builder will not be supported. If you need Delphi 3 or C++ Builder 3 support you will have to revert to version 3.7 of the Drag and Drop Component Suite. The library has been tested on NT4 service pack 5 and Windows 2000. Windows 95, 98, ME and XP should be supported, but has not been tested. Linux and Kylix are not supported. There are *NO* plans to port the library to Kylix. The drag and drop protocols available on Linux are too much of a mess at this time. ------------------------------------------- 2. Installation: ------------------------------------------- 1) Before you do anything else, read the "Known problems" section of this document. 2) Install the source into a directory of your choice. The files are installed into three directories: DragDrop DragDrop\Components DragDrop\Demo 3) Install and compile the appropriate design time package. The design time packages are located in the Components directory. Each version of Delphi and C++ Builder has its own package; DragDropD6.dpk for Delphi 6, DragDropD5.dpk for Delphi 5, DragDropC5.bpk for C++ Builder 5, etc. 4) Add the Drag and Drop Component Suite components directory to your library path. 5) Load the demo project group: demo\dragdrop_delphi.bpg for Delphi 5 and 6 demo\dragdrop_bcb4.bpg for C++ Builder 4 demo\dragdrop_bcb5.bpg for C++ Builder 5 The project group contains all the demo applications. 6) If your version of Delphi does not support text format DFM files (e.g. Delphi 4 doesn't), you will have to use the convert.exe utility supplied with Delphi to convert all the demo form files to binary format. A batch file, convert_forms_to delphi_4_format.bat, is supplied in the demo directory which automates the conversion process. The C++ Builder demo forms are distributed in binary format. 7) If upgrading from a previous version of the Drag and Drop Component Suite, please read the document "upgrading_to_v4.txt" before you begin working on your existing projects. Note about "Property does not exist" errors: Since all demos were developed with the latest version of Delphi, most of the demo forms probably contains references to properties that doesn't exist in earlier versions of Delphi and C++ Builder. Because of this you will get fatal run-time errors (e.g. "Error reading blahblahblah: Property does not exist.") if you attemt to run the demos without fixing this problem. Luckily it is very easy to make the forms work again; Just open the forms in the IDE, then select "Ignore All" when the IDE complains that this or that property doesn't exist and finally save the forms. ------------------------------------------- 3. Getting started: ------------------------------------------- It is recommended that you start by running each of the demo applications and then look through the demo source. Each demo application is supplied with a readme.txt file which briefly describes what the demo does and what features it uses. The demos should be run in the order in which they are listed in the supplied project group. Even if you have used previous versions of the Drag and Drop Component Suite it would be a good idea to have a quick look at the demos. The library has been completely rewritten and a lot of new features has been added. ------------------------------------------- 4. Known problems: ------------------------------------------- * The Shell Extension components does not support C++ Builder 4. For some strange reason the components causes a link error. * There appear to be sporadic problems compiling with C++ Builder 5. Several user have reported that they occasionally get one or more of the following compiler errors: [C++ Error] DragDropFile.hpp(178): E2450 Undefined structure '_FILEDESCRIPTORW' [C++ Error] DropSource.hpp(135): E2076 Overloadable operator expected I have not been able to reproduce these errors, but I believe the following work around will fix the problem: In the project options of *all* projects which uses these components, add the following conditional define: NO_WIN32_LEAN_AND_MEAN The define *must* be made in the project options. It is not sufficient to #define it in the source. If you manage to compile with C++ Builder (any version), I would very much like to know about it. * Delphi's and C++ Builder's HWND and THandle types are not compatible. For this reason it might be nescessary to cast C++ Builder's HWND values to Delphi's THandle type when a HWND is passed to a function. E.g.: if (DragDetectPlus(THandle(MyControl->Handle), Point(X, Y))) { ... } * Virtual File Stream formats can only be pasted from the clipboard with live data (i.e. FlushClipboard/OleFlushClipboard hasn't been called on the data source). This problem affects TFileContentsStreamOnDemandClipboardFormat and the VirtualFileStream demo. This is believed to be a bug in the Windows clipboard and a work around hasn't been found yet. * Asynchronous targets appears to be broken in the current release. * When TDropFileTarget.GetDataOnEnter is set to True, the component doesn't work with WinZip. Although the file names are received correctly by TDropFileTarget, WinZip doesn't extract the files and the files thus can't be copied/moved. This is caused by a quirk in WinZip; Apparently WinZip doesn't like IDataObject.GetData to be called before IDropTarget.Drop is called. ------------------------------------------- 5. Support and feedback: ------------------------------------------- Since these components are freeware they are also unsupported. You are welcome to ask for help via email, but I cannot guarantee that I will have time to help you or even reply to your mail. If you absolytely can't live without my help, you can alway try bribing me. You can also try asking for help in the Delphi newsgroups. Since the Drag and Drop Component Suite is in widespread use, there's a good chance another user can help you. I recommend the following newsgroups for issues regarding this library (or COM based Drag/Drop in general): borland.public.delphi.winapi borland.public.delphi.thirdparty-tools borland.public.delphi.oleautomation borland.public.cppbuilder.winapi borland.public.cppbuilder.thirdparty-tools Please choose the most appropiate newsgroup for your question. Do not cross post to them all. Before posting to the newsgroups, I suggest you try to search for an answer on the Google (DejaNews) search engine: http://groups.google.com Chances are that your question has been asked and answered before. If you have suggestions for improvements please mail them to me: anders@melander.dk Please include the words "Drag Drop" in the subject of any email regarding these components. ------------------------------------------- 6. Bug reports: ------------------------------------------- Bugs can either be reported at my home page (http://www.melander.dk/) or mailed directly to me: anders@melander.dk. When reporting a bug, please provide the following information: * The exact version of the Drag and Drop Component Suite you are using. * The exact version of Delphi or C++ Builder you are using. * The name and exact version of your operating system (e.g. NT4 SP5). * The exact version of the Internet Explorer installed on your system. If you can provide me with a minimal application which reproduces the problem, I can almost guarantee that I will be able to fix the problem in very short time. Please supply only the source files (pas, dfm, dpr, dof, res, etc.) and mail them as a single zip file. If I need a compiled version I will ask for it. If you feel you need to send me a screen shot, please send it in GIF or PNG format. If you mail a bug report to me, please include the words "Drag Drop" in the subject of your email. ------------------------------------------- 7. Upgrades and bug fixes: ------------------------------------------- Upgrades can be downloaded from my home page: http://www.melander.dk/delphi/dragdrop/ Bug fixes will also be posted to the above page. If you have registered for update notification via the installation program, you will receive email notification when a new release is available. You will not be notified of bug fixes. You can use the installation program to check for and download new releases and to check for known bugs. Note: If a new release is made available and you are not notified even though you registered for notification, you probably mistyped your email address during installation; About 10% of all registrations supply an invalid email address. ------------------------------------------- 8. Missing in this release: ------------------------------------------- * On-line help has not been updated and included in the kit due to late changes in the Delphi 6 help system and lack of time. If time permits, I will update the help and include it in a future release. ------------------------------------------- 9. New in version 4.x: ------------------------------------------- * Completely redesigned and rewritten. Previous versions of the Drag and Drop Component Suite used a very monolithic design and flat class hierachy which made it a bit cumbersome to extend the existing components or implement new ones. Version 4 is a complete rewrite and redesign, but still maintains compatibility with previous versions. The new V4 design basically separates the library into three layers: 1) Clipboard format I/O. 2) Data format conversion and storage. 3) COM Drag/Drop implementation and VCL component interface. The clipboard format layer is responsible for reading and writing data in different formats to and from an IDataObject interface. For each different clipboard format version 4 implements a specialized class which knows exactly how to interpret the clipboard format. For example the CF_TEXT (plain text) clipboard format is handled by the TTextClipboardFormat class and the CF_FILE (file names) clipboard format is handled by the TFileClipboardFormat class. The data format layer is primarily used to render the different clipboard formats to and from native Delphi data types. For example the TTextDataFormat class represents all text based clipboard formats (e.g. TTextClipboardFormat) as a string while the TFileDataFormat class represents a list of file names (e.g. TFileClipboardFormat) as a string list. The conversion between different data- and clipboard formats is handled by the same Assign/AssignTo mechanism as the VCLs TPersistent employes. This makes it possible to extend existing data formats with support for new clipboard formats without modification to the existing classes. The drag/drop component layer has several tasks; It implements the actual COM drag/drop functionality (i.e. it implements the IDropSource, IDropTarget and IDataObject interfaces (along with several other related interfaces)), it surfaces the data provided by the data format layer as component properties and it handles the interaction between the whole drag/drop framework and the users code. The suite provides a multitude of different components. Most are specialized for different drag/drop tasks (e.g. the TDropFileTarget and TDropFilesSource components for drag/drop of files), but some are either more generic, handling multiple unrelated formats, or simply helper components which are used to extend the existing components or build new ones. * Support for Delphi 6. Version 4.0 was primarily developed on Delphi 6 and then ported back to previous versions of Delphi and C++ Builder. * Support for Windows 2000 inter application drag images. On Windows platforms which supports it, drag images are now displayed when dragging between applications. Currently only Windows 2000 supports this feature. On platforms which doesn't support the feature, drag images are only displayed whithin the source application. * Support for Windows 2000 asynchronous data transfers. Asynchronous data tranfers allows the drop source and targets to perform slow transfers or to transfer large amounts of data without blocking the user interface while the data is being transfered. For platforms other than Windows 2000, the new TDropSourceThread class can be used to provide similar (but more limited) asynchronous data transfer capabilities. * Support for optimized and non-optimized move. When performing drag-move operations, it is now possible to specify if the target (optimized move) or the source (non-optimized move) is responsible for deleting the source files. * Support for delete-on-paste. When data is cut to the clipboard, it is now possible to defer the deletion of the source data until the target actually pastes the data. The source is notified by an event when the target pastes the data. * Extended clipboard support. All formats and components (both source and target) now support clipboard operations (copy/cut/paste) and the VCL clipboard object. * Support for shell drop handlers. The new TDropHandler component can be used to write drop handler shell extensions. A drop handler is a shell extension which is executed when a user drags and drops one or more files on a file associated wth your application. * Support for shell drag drop handlers. The new TDragDropHandler component can be used to write drag drop handler shell extensions. A drag drop handler is a shell extension which can extend the popup menu which is displayed when a user drag and drops files with the right mouse button. * Support for shell context menu handlers. The new TDropContextMenu component can be used to write context menu handler shell extensions. A context menu handler is a shell extension which can extend the popup menu which is displayed when a user right-clicks a file in the shell. * Drop sources can receive data from drop targets. It is now possible for drop targets to write data back to the drop source. This is used to support optimized-move, delete-on-paste and inter application drag images. * Automatic re-registration of targets when the target window handle is recreated. In previous versions, target controls would loose their ability to accept drops when their window handles were recreated by the VCL (e.g. when changing the border style or docking a form). This is no longer a problem. * Support for run-time definition of custom data formats. You can now add support for new clipboard formats without custom components. * Support for design-time extension of existing source and target components. Using the new TDataFormatAdapter component it is now possible to mix and match data formats and source and target components at design time. E.g. the TDropFileTarget component can be extended with URL support. * It is now possible to completely customize the target auto-scroll feature. Auto scroling can now be completely customized via the OnDragEnter, OnDragOver, OnGetDropEffect and OnScroll events and the public NoScrollZone and published AutoScroll properties. * Multiple target controls per drop target component. In previous versions you had to use one drop target component per target control. With version 4, each drop target component can handle any number of target controls. * It is now possible to specify the target control at design time. A published Target property has been added to the drop target components. * Includes 20 components: - TDropFileSource and TDropFileTarget Used for drag and drop of files. Supports recycle bin and PIDLs. - TDropTextSource and TDropTextTarget Used for drag and drop of text. - TDropBMPSource and TDropBMPTarget Used for drag and drop of bitmaps. - TDropPIDLSource and TDropPIDLTarget Used for drag and drop of PIDLs in native format. - TDropURLSource and TDropURLTarget Used for drag and drop of internet shortcuts. - TDropDummyTarget Used to provide drag/drop cursor feedback for controls which aren't registered as drop targets. - TDropComboTarget (new) Swiss-army-knife target. Accepts text, files, bitmaps, meta files, URLs and file contents. - TDropMetaFileTarget (new) Target which can accept meta files and enhanced meta files. - TDropImageTarget (new) Target which can accept bitmaps, DIBs, meta files and enhanced meta files. - TDragDropHandler (new) Used to implement Drag Drop Handler shell extensions. - TDropHandler (new) Used to implement Shell Drop Handler shell extensions. - TDragDropContext (new) Used to implement Shell Context Menu Handler shell extensions. - TDataFormatAdapter (new) Extends the standard source and target components with support for extra data formats. An alternative to TDropComboTarget. - TDropEmptySource and TDropEmptyTarget (new) Target and source components which doesn't support any formats, but can be extended with TDataFormatAdapter components. * Supports 27 standard clipboard formats: Text formats: - CF_TEXT (plain text) - CF_UNICODETEXT (Unicode text) - CF_OEMTEXT (Text in the OEM characterset) - CF_LOCALE (Locale specification) - 'Rich Text Format' (RTF text) - 'CSV' (Tabular spreadsheet text) File formats: - CF_HDROP (list of file names) - CF_FILEGROUPDESCRIPTOR, CF_FILEGROUPDESCRIPTORW and CF_FILECONTENTS (list of files and their attributes and content). - 'Shell IDList Array' (PIDLs) - 'FileName' and 'FileNameW' (single filename, used for 16 bit compatibility). - 'FileNameMap' and 'FileNameMapW' (used to rename files, usually when dragging from the recycle bin) Image formats: - CF_BITMAP (Windows bitmap) - CF_DIB (Device Independant Bitmap) - CF_METAFILEPICT (Windows MetaFile) - CF_ENHMETAFILE (Enhanced Metafile) - CF_PALETTE (Bitmap palette) Internet formats: - 'UniformResourceLocator' and 'UniformResourceLocatorW' (Internet shortcut) - 'Netscape Bookmark' (Netscape bookmark/URL) - 'Netscape Image Format' (Netscape image/URL) - '+//ISBN 1-887687-00-9::versit::PDI//vCard' (V-Card) - 'HTML Format' (HTML text) - 'Internet Message (rfc822/rfc1522)' (E-mail message in RFC822 format) Misc. formats: - CF_PREFERREDDROPEFFECT and CF_PASTESUCCEEDED (mostly used by clipboard) - CF_PERFORMEDDROPEFFECT and CF_LOGICALPERFORMEDDROPEFFECT (mostly used for optimized-move) - 'InShellDragLoop' (used by Windows shell) - 'TargetCLSID' (Mostly used when dragging to recycle-bin) * New source events: - OnGetData: Fired when the target requests data. - OnSetData: Fired when the target writes data back to the source. - OnPaste: Fired when the target pastes data which the source has placed on the clipboard. - OnAfterDrop: Fired after the drag/drop operation has completed. * New target events: - OnScroll: Fires when the target component is about to perform auto-scroll on the target control. - OnAcceptFormat: Fires when the target component needs to determine if it will accept a given data format. Only surfaced in the TDropComboTarget component. * 8 new demo applications, 19 in total. ------------------------------------------- 10. TODO (may or may not be implemented): ------------------------------------------- * Async target demo (with and without IAsyncOperation support). * Scrap file demo. * Native Outlook message format. * Structured storage support (IStorage encapsulation). ------------------------------------------- 11. Licence, Copyright and Disclaimer: ------------------------------------------- The Drag and Drop Component Suite is Copyright ?1997-2001 Angus Johnson and Anders Melander. All rights reserved. The software is copyrighted as noted above. It may be freely copied, modified, and redistributed, provided that the copyright notice(s) is preserved on all copies. The Drag and Drop Component Suite is freeware and we would like it to remain so. This means that it may not be bundled with commercial libraries or sold as shareware. You are welcome to use it in commercial and shareware applications providing you do not charge for the functionality provided by the Drag and Drop Component Suite. There is no warranty or other guarantee of fitness for this software, it is provided solely "as is". You are welcome to use the source to make your own modified components, and such modified components may be distributed by you or others if you include credits to the original components, and do not charge anything for your modified components. ------------------------------------------- 12. Version 4 release history: ------------------------------------------- 16-dec-2001 * Ported to C++ Builder 4. * Released for test as v4.1 FT5. 12-dec-2001 * Fixed C++ Builder name clash between TDropComboTarget.GetMetaFile and the GetMetaFile #define in wingdi.h 1-dec-2001 * The IAsyncOperation interface is now also declared as IAsyncOperation2 and all references to IAsyncOperation has been replaced with IAsyncOperation2. This was done to work around a bug in C++ Builder. Thanks to Jonathan Arnold for all his help with getting the components to work with C++ Builder. Without Jonathan's help version 4.1 would prabably have shipped witout C++ Builder support and certainly without any C++ Builder demos. * Demo applications for C++ Builder. The C++ Builder demos were contributed by Jonathan Arnold. 27-nov-2001 * TCustomDropTarget.Droptypes property renamed to DropTypes (notice the case). Thanks to Krystian Brazulewicz for spotting this. 24-nov-2001 * The GetURLFromString function in the DragDropInternet unit has been made public due to user request. 21-nov-2001 * Modified MakeHTML function to comply with Microsoft's description of the CF_HTML clipboard format. * Added MakeTextFromHTML function to convert CF_HTML data to plain HTML. Provides the reverse functionality of MakeHTML. * Added HTML support to TTextDataFormat class and TDropTextSource and TDropTextTarget components. * Fixed C++ Builder 5 problem with IAsyncOperation. * Released for test as v4.1 FT4. 10-nov-2001 * Added NetscapeDemo demo application. Demonstrates how to receive messages dropped from Netscape. This demo was sponsored by ThoughtShare Communications Inc. * Released for test as v4.1 FT3. 23-oct-2001 * Conversion priority of TURLDataFormat has been changed to give the File Group Descritor formats priority over the Internet Shortcut format. This resolves a problem where dropping an URL on the desktop would cause the desktop to assume that an Active Desktop item was to be created instead of an Internet Shortcut. Thanks to Allen Martin for reporting this problem. By luck this modification also happens to work around a bug in Mozilla and Netscape 6; Mozilla incorrectly supplies the UniformResourceLocator clipboard format in unicode format instead of ANSI format. Thanks to Florian Kusche for reporting this problem. * Added support for TFileGroupDescritorWClipboardFormat to TURLDataFormat. * Added declaration of FD_PROGRESSUI to DragDropFormats. * Added TURLWClipboardFormat which implements the "UniformResourceLocatorW" (a.k.a. CFSTR_INETURLW) clipboard format. Basically a Unicode version of CFSTR_SHELLURL/CFSTR_INETURL. The TURLWClipboardFormat class isn't used anywhere yet but will probably be supported by TURLDataFormat (and thus TDropURLTarget/TDropURLSource) in a later release. * Added experimental Shell Drag Image support. This relies on undodumented shell32.dll functions and probably won't be fully support before v4.2 (if ever). See InitShellDragImage in DropSource.pas. Thanks to Jim Kueneman for bringning these functions to my attention. 13-oct-2001 * TCustomDropSource.Destroy and TCustomDropMultiSource.Destroy changed to call FlushClipboard instead of EmptyClipboard. This means that clipboard contents will be preserved when the source application/component is terminated. * Added clipboard support to VirtualFileStream demo. * Modified VirtualFileStream demo to work around clipboard quirk with IStream medium. * Modified TCustomSimpleClipboardFormat to disable TYMED_ISTORAGE support by default. At present TYMED_ISTORAGE is only supported for drop targets and enabling it by default in TCustomSimpleClipboardFormat.Create caused a lot of clipboard operations (e.g. copy/paste of text) to fail. Thanks to Michael J Marshall for bringing this problem to my attention. * Modified TCustomSimpleClipboardFormat to read from the the TYMED_ISTREAM medium in small (1Mb) chunks and via a global memory buffer. This has resultet in a huge performance gain (several orders of magnitude) when transferring large amounts of data via the TYMED_ISTREAM medium. 3-oct-2001 * Fixed bug in TCustomDropSource.SetImageIndex. Thanks to Maxim Abramovich for spotting this. * Added missing default property values to TCustomDropSource. Thanks to Maxim Abramovich for spotting this. * DragDrop.pas and DragDropContext.pas updated for Delphi 4. * Reimplemented utility to convert DFM form files from Delphi 5/6 test format to Delphi 4/5 binary format. * Improved unregistration of Shell Extensions. Shell extension now completely (and safely) remove their registry entries when unregistered. * Deprecated support for C++ Builder 3. * Released for test as v4.1 FT2. 25-sep-2001 * Rewritten ContextMenuHandlerShellExt demo. The demo is now actually a quite useful utility which can be used to register and unregister ActiveX controls, COM servers and type libraries. It includes the same functionality as Borland's TRegSvr utility. 20-sep-2001 * Added support for cascading menus, ownerdraw and menu bitmaps to TDropContextMenu component. * Modified TFileContentsStreamOnDemandClipboardFormat to handle invalid parameter value (FormatEtcIn.lindex) when data is copied to clipboard. This works around an apparent bug in the Windows clipboard. Thanks to Steve Moss for reporting this problem. * Modified TEnumFormatEtc class to not enumerate empty clipboard formats. Thanks to Steve Moss for this improvement. 1-sep-2001 * Introduced TCustomDropTarget.AutoRegister property. The AutoRegister property is used to control if drop target controls should be automatically unregistered and reregistered when their window handle is recreated by the VCL. If AutoRegister is True, which is the default, then automatic reregistration will be performed. This property was introduced because the hidden child control, which is used to monitor the drop target control's window handle, can have unwanted side effects on the drop target control (e.g. TToolBar). * Deprecated support for Delphi 3. 22-jun-2001 * Redesigned TTextDataFormat to handle RTF, Unicode, CSV and OEM text without conversion. Moved TTextDataFormat class to DragDropText unit. Added support for TLocaleClipboardFormat. * Surfaced new text formats as properties in TDropTextSource and TDropTextTarget. Previous versions of the Text source and target components represented all supported text formats via the Text property. In order to enable users to handle the different text formats independantly, the text source and target components now has individual properties for ANSI, OEM, Unicode and RTF text formats. The text target component can automatically synthesize some of the formats from the others (e.g. OEM text from ANSI text), but applications which previously relied on all formats being represented by the Text property will have to be modified to handle the new properties. * Added work around for problem where TToolBar as a drop target would display the invisible target proxy window. * Fixed wide string bug in WriteFilesToZeroList. Thanks to Werner Lehmann for spotting this. 15-jun-2001 * Added work-around for Outlook Express IDataObject.QueryGetData quirk. 3-jun-2001 * Ported to C++ Builder 4 and 5. * Added missing DragDropDesign.pas unit to design time packages. * First attempt at C++ Builder 3 port.... failed. * Improved handling of oversized File Group Descriptor data. * Added support for IStorage medium to TFileContentsStreamClipboardFormat. This allows the TDropComboTarget component to accept messages dropped from Microsoft Outlook. This work was sponsored by ThoughtShare Communications Inc. 23-may-2001 * Ported to Delphi 4. * First attempt at C++ Builder 5 port.... failed. 18-may-2001 * Released as version 4.0. Note: Version 4.0 was released exclusively on the Delphi 6 Companion CD. * ContextMenuDemo and DropHandlerDemo application has been partially rewritten and renamed. ContextMenuDemo is now named ContextMenuHandlerShellExt. DropHandlerDemo is now named DropHandlerShellExt. * TDropContextMenu component has been rewitten. The TDropContextMenu now implements a context menu handler shell extension. In previous releases it implemented a drag drop handler shell extension. * The DragDropHandler.pas unit which implements the TDropHandler component has been renamed to DropHandler.pas. * Added new TDragDropHandler component. The new component, which lives in the DragDropHandler unit, is used to implement drag drop handler shell extensions. * Added DragDropHandlerShellExt demo application. * Removed misc incomplete demos from kit. * Fixed minor problem in VirtualFileStream demo which caused drops from the VirtualFile demo not to transfer content correctly. 11-may-2001 * Converted all demo forms to text DFM format. This has been nescessary to maintain compatibility between all supported versions of Delphi. * Fixed a bug in GetPIDLsFromFilenames which caused drag-link of files (dtLink with TDropFileSource) not to work. * Added readme.txt files to some demo applications. * Added missing tlb and C++ Builder files to install kit. * Released as FT4. 6-may-2001 * Added missing dfm files to install kit. * Tested with Delphi 5. Fixed Delphi 5 compatibility error in main.dfm of DragDropDemo. * Removed misc compiler warnings. * The AsyncTransferTarget and OleObjectDemo demos were incomplete and has been removed from the kit for the V4.0 release. The demos will be included in a future release. * Released as FT3. 3-may-2001 * Added missing dpr and bpg files to install kit. * Updated readme.txt with regard to lack of C++ Builder demos. * Released as FT2. 29-apr-2001 * Cleaned up for release. * Released as FT1. 23-feb-2001 * Modified TCustomDropTarget.FindTarget to handle overlapping targets (e.g. different targets at the same position but on different pages of a page control or notebook). Thanks to Roger Moe for spotting this problem. 13-feb-2001 * Renamed AsyncTransfer2 demo to AsyncTransferSource. * Added AsyncTransferTarget demo. * Replaced TChart in AsyncTransfer2 demo with homegrown pie-chart-thing. * Modified all IStream based target formats to support incremental transfer. * URW533 problem has finally been fixed. The cause of the problem, which is a bug in Delphi, was found by Stefan Hoffmeister. * Fixed free notification for TDropContextmenu and TDataFormatAdapter. 27-dec-2000 * Moved TVirtualFileStreamDataFormat and TFileContentsStreamOnDemandClipboardFormat classes from VirtualFileStream demo to DragDropFormats unit. * Added TClipboardFormat.DataFormat and TClipboardFormats.DataFormat property. * Added TDropEmptySource and TDropEmptyTarget components. These are basically do-nothing components for use with TDataFormatAdapter. * Rewritten AsyncTransfer2 demo. The demo now uses TDropEmptySource, TDataFormatAdapter and TVirtualFileStreamDataFormat to transfer 10Mb of data with progress feedback. * Rewritten VirtualFileStream demo. The demo now uses TDropEmptySource, TDropEmptyTarget, TDataFormatAdapter and TVirtualFileStreamDataFormat. * Fixed memory leak in TVirtualFileStreamDataFormat. This leak only affected the old VirtualFileStream demo. * Added support for full File Descriptor attribute set to TVirtualFileStreamDataFormat. It is now possible to specify file attributes such as file size and last modified time in addition to the filename. I plan to add similar features to the other classes which uses FileDescriptors (e.g. TDropFileSource and TDropFileTarget). 21-dec-2000 * Ported to Delphi 4. * Added workaround for design bug in either Explorer or the clipboard. Explorer and the clipboard's requirements to the cursor position of an IStream object are incompatible. Explorer requires the cursor to be at the beginning of stream and the clipboard requires the cursor to be at the end of stream. 15-dec-2000 * Fixed URW533 problem. I'll leave the description of the workaround in here for now in case the problem resurfaces. 11-dec-2000 * Fixed bug in filename to PIDL conversion (GetPIDLsFromFilenames) which affected TDropFileTarget. Thanks to Poul Halgaard J鴕gensen for reporting this. 4-dec-2000 * Added THTMLDataFormat. * Fixed a a few small bugs which affected clipboard operations. * Added {$ALIGN ON} to dragdrop.inc. Apparently COM drag/drop requires some structures to be word alligned. This change fixes problems where some of the demos would suddenly stop working. * The URW533 problem has resurfaced. See the "Known problems" section below. 13-nov-2000 * TCopyPasteDataFormat has been renamed to TFeedbackDataFormat. * Added support for the Windows 2000 "TargetCLSID" format with the TTargetCLSIDClipboardFormat class and the TCustomDropSource.TargetCLSID property. * Added support for the "Logical Performed DropEffect" format with the TLogicalPerformedDropEffectClipboardFormat class. The class is used internally by TCustomDropSource. 30-oct-2000 * Added ContextMenu demo and TDropContextMenu component. Demonstrates how to customize the context menu which is displayed when a file is dragged with the right mouse button and dropped in the shell. * Added TCustomDataFormat.GetData. With the introduction of the GetData method, Data Format classes can now be used stand-alone to extract data from an IDataObject. 20-oct-2000 * Added VirtualFileStream demo. Demonstrates how to use the "File Contents" and "File Group Descritor" clipboard formats to drag and drop virtual files (files which doesn't exist physically) and transfer the data on-demand via a stream. 14-oct-2000 * Added special drop target registration of TCustomRichEdit controls. TCustomRichEdit needs special attention because it implements its own drop target handling which prevents it to work with these components. TCustomDropTarget now disables a rich edit control's built in drag/drop handling when the control is registered as a drop target. * Added work around for Windows bug where IDropTarget.DragOver is called regardless that the drop has been rejected in IDropTarget.DragEnter. 12-oct-2000 * Fixed bug that caused docking to interfere with drop targets. Thanks to G. Bradley MacDonald for bringing the problem to my attention. 30-sep-2000 * The DataFormats property has been made public in the TCustomDropMultiTarget class. * Added VirtualFile demo. Demonstrates how to use the TFileContentsClipboardFormat and TFileGroupDescritorClipboardFormat formats to drag and drop a virtual file (a file which doesn't exist physically). 28-sep-2000 * Improved drop source detection of optimized move. When an optimized move is performed by a drop target, the drop source's Execute method will now return drDropMove. Previously drCancel was returned. The OnAfterDrop event must still be used to determine if a move operation were optimized or not. * Modified TCustomDropTarget.GetPreferredDropEffect to get data from the current IDataObject instead of from the VCL global clipboard. 18-sep-2000 * Fixed bug in DropComboTarget caused by the 17-sep-2000 TStreams modification. 17-sep-2000 * Added AsyncTransfer2 demo to demonstrate use of TDropSourceThread. * Renamed TStreams class to TStreamList. 29-aug-2000 * Added TDropSourceThread. TDropSourceThread is an alternative to Windows 2000 asynchronous data transfers but also works on other platforms than Windows 2000. TDropSourceThread is based on code contributed by E. J. Molendijk. 24-aug-2000 * Added support for Windows 2000 asynchronous data transfers. Added IAsyncOperation implementation to TCustomDropSource. Added TCustomDropSource.AllowAsyncTransfer and AsyncTransfer properties. 5-aug-2000 * Added work around for URW533 compiler bug. * Fixed D4 and D5 packages and updated a few demos. Obsolete DropMultiTarget were still referenced a few places. * Documented work around for C++ Builder 5 compiler error. See the Known Problems section later in this document for more information. 2-aug-2000 * The package files provided in the kit is now design-time only packages. In previous versions, the packages could be used both at design- and run-time. The change was nescessary because the package now contains design-time code. * Added possible work around for suspected C++ Builder bug. The bug manifests itself as a "Overloadable operator expected" compile time error. See the "Known problems" section of this document. * Rewrote CustomFormat1 demo. * Added CustomFormat2 demo. * TDataDirection members has been renamed from ddGet and ddSet to ddRead and ddWrite. * All File Group Descritor and File Contents clipboard formats has been moved from the DragDropFile unit to the DragDropFormats unit. * File Contents support has been added to TTextDataFormat. The support is currently only enabled for drop sources. * Renamed TDropMultiTarget component to TDropComboTarget. Note: This will break applications which uses the TDropMultiTarget component. You can use the following technique to port application from previous releases: 1) Install the new components. 2) Repeat step 3-8 for all units which uses the TDropMultiTarget component. 3) Make a backup of the unit (both pas and dfm file) just in case... 4) Open the unit in the IDE. 5) In the .pas file, replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 6) View the form as text. 7) Replace all occurances of "TDropMultiTarget" with "TDropComboTarget". 8) Save the unit. * Renamed a lot of demo files and directories. * Added work around for yet another bug in TStreamAdapter. * Added TCustomStringClipboardFormat as new base class for TCustomTextClipboardFormat. This changes the class hierachy a bit for classes which previously descended from TCustomTextClipboardFormat: All formats which needs zero termination now descend from TCustomTextClipboardFormat and the rest descend from TCustomStringClipboardFormat. Added TrimZeroes property. Fixed zero termination bug in TCustomTextClipboardFormat and generally improved handling of zero terminated strings. Disabled zero trim in TCustomStringClipboardFormat and enabled it in TCustomTextClipboardFormat. 23-jul-2000 * Improved handling of long file names in DropHandler demo. Added work around for ParamStr bug. * Added TDataFormatAdapter component and adapter demo. TDataFormatAdapter is used to extend the existing source and target components with additional data format support without modifying them. It can be considered an dynamic alternative to the current TDropMultiTarget component. 17-jul-2000 * TDropHandler component and DropHandler demo fully functional. 14-jul-2000 * Tested with C++ Builder 5. * Fixed sporadic integer overflow bug in DragDetectPlus function. * Added shell drop handler support with TDropHandler component. This is a work in progress and is not yet functional. 1-jul-2000 * Tested with Delphi 4. * Support for Windows 2000 inter application drag images. * TRawClipboardFormat and TRawDataFormat classes for support of arbitrary unknown clipboard formats. The classes are used internally in the TCustomDropSource.SetData method to support W2K drag images.
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Description: 目录:
0、 约定
1、 无符号数一位乘法
2、 符号数一位乘法
3、 布思算法(Booth algorithm)
4、 高基(High Radix)布思算法
5、 迭代算法
6、 乘法运算的实现——迭代
7、 乘法运算的实现——阵列
8、 乘加运算
9、 设计示例1 —— 8位、迭代
1、 实现方案1 —— 一位、无符号
2、 实现方案2 —— 一位、布思
3、 实现方案3 —— 二位
10、设计示例2 —— 16位、阵列
11、设计示例3 —— 32位、 迭代、阵列
1、 实现方案1 —— 乘、加一步走
2、 实现方案2 —— 乘、加两步走-Contents : 0, an agreement, an unsigned multiplication number two, a few multiplication symbols 3, Andrew Bruce algorithm (Booth algorithm) 4. Gao (High Radix), Andrew Bruce algorithm 5, 6 iterative algorithm, the realization of multiplication-- iterative 7, Implementation of multiplication-- Array 8, multiply-add nine, design examples 1-- 8 spaces, an iterative, Implementation 1-- one, two unsigned achieve program 2-- 1, 3, Andrew Bruce, Implementation 3-- 2 10 design examples 2-- 16 spaces, 11 arrays, design examples 3-- 32 spaces, iterative, an array achieve program 1-- x, plus step two, achieving program 2-- x, plus two-step
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Description: 基于Verilog-HDL的硬件电路的实现
9.7 步进电机的控制
9.7.1 步进电机驱动的逻辑符号
9.7.2 步进电机驱动的时序图
9.7.3 步进电机驱动的逻辑框图
9.7.4 计数模块的设计与实现
9.7.5 译码模块的设计与实现
9.7.6 步进电机驱动的Verilog-HDL描述
9.7.7 编译指令-"宏替换`define"的使用方法
9.7.8 编译指令-"时间尺度`timescale"的使用方法
9.7.9 系统任务-"$finish"的使用方法
9.7.10 步进电机驱动的硬件实现
-based on Verilog-HDL hardware Circuit of 9.7 Stepper Motor Control 9.7 .1 stepper motor-driven logic symbols 9.7.2 stepper motor driven map the chronology-- Step 9.7.3 Machine-driven logic diagram 9.7.4 Counting Module Design and Implementation 9.7.5 decoding module design and Implementation 9.7.6 stepper motor driven Verilog-HDL Compiler means locale 9.7.7 Description Order- "macro substitution` define "the use 9.7.8 compiler directives-" The time scale `tim escale "use 9.7.9 system tasks-" $ finish "to use 9.7.10 stepper motor drive hardware
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Description: 迄今为止见过的最方便的huffman编码，效率很高
一个外国人写的，很具有研究价值
Constructing a Huffman Tree according to the number of times each symbol appears in the data stream:
1) Create an array of N nodes, representing N possible symbols (ranging between 0 and N-1).
2) Set the value of each node to the number of times that its symbol appears in the data stream.
3) Create a Minimum-Heap of N nodes.
4) Add every node whose value is greater than zero to the heap.
5) Extract the best two nodes in the heap.
6) Create a parent node whose children are the two extracted nodes.
7) Add the parent node to the heap.
8) Repeat the previous three steps N-1 times (until only 1 node remains in the heap).
9) Extract the last node in the heap.
The array created in the first step stores the leaves of the tree, and is used in order to encode the data stream.
The node extracted in the last step is in fact the root of the tree, and is used in order to decode the data stream.-So far seen the most convenient huffman coding, efficient write a foreigner, I have research value Constructing a Huffman Tree according to the number of times each symbol appears in the data stream: 1) Create an array of N nodes , representing N possible symbols (ranging between 0 and N-1) .2) Set the value of each node to the number of times that its symbol appears in the data stream.3) Create a Minimum-Heap of N nodes.4) Add every node whose value is greater than zero to the heap.5) Extract the best two nodes in the heap.6) Create a parent node whose children are the two extracted nodes.7) Add the parent node to the heap.8) Repeat the previous three steps N-1 times (until only 1 node remains in the heap) .9) Extract the last node in the heap.The array created in the first step stores the leaves of the tree, and is used in order to encode the data stream.The node extracted in the last step is in fact the root of the tree, and is used in order to decode the data stream.
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Description: symbian C++ 入门经典
初学者必读，step by step
目录
1 概述 5
2 预备知识 5
3 Symbian OS Platform及应用开发5
3.1 内核和用户库.5
3.2 文件和目录5
3.3 目标平台及其变种6
3.4 Symbian OS的目标类型.6
4 应用开发工具包（SDKs）和工具7
4.1 SDK安装后的目录结构.7
4.1.1 根目录.7
4.1.2 Epoc32\.7
4.1.3 Epoc32Ex\8
4.2 应用构建工具.8
4.2.1 项目定义文件9
4.2.2 组件描述文件（bld.inf）9
4.2.3 bldmake命令9
5 渐进式指导10
5.1 控制台应用.10
5.2 基本源文件.10
5.3 构建应用.10
5.4 运行应用.11
6 深入研讨 13-symbian C++ entry classic must-read for beginners, step by step overview of 52 Contents 1 Preliminaries 53 Symbian OS Platform and Application Development 53.1 kernel and user library files and directories .53.2 target platform 53.3 and 63.4 Symbian OS variants of the target Type .64 Application Development Toolkit (SDKs) and tools 74.1 SDK installation directory structure .74.1.1 root .74.1.2 Epoc32.74.1.3 Epoc32Ex84.2 application project to build tools .84.2.1 definition files 94.2.2 component description file (bld.inf) 94.2.3 bldmake command 95 progressive 105.1 console application guidance .105.2 basic source files to build applications .105.3 Application .105.4 run .116 depth 13
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Description: xl系列单片机实验仪演示程序 LCD1602显示 步进电机控制器速度方向圈数可调 LCD1602显示 步进电机控制器速度方向圈数可调 K1－启动与停止步进电机运行 K2－设定步进电机运行圈数 （1-20圈） K3－设定步进电机转动方向 K4－设定步进电机运行速度 步进电机的转速控制分16档，数字越小，转速越快。 7.5度步进电机；周期7.5×4=30度，电机转动一圈需12个周期 资源：p1.0-p1.3接反向器74ls14，输出后接步进电机 p3.7接小喇叭提供按键音, p1.4-p1.7接端口按键：lcd1602插入实验仪-xl Series Singlechip Experiment LCD1602 demo program shows the direction of stepper motor speed controller circle shows the number of adjustable LCD1602 direction stepper motor controller lap speed of a few adjustable K1-start and stop the stepper motor running K2-setting step motor running a few laps (1-20 laps) K3-set stepper motor rotation direction of K4-setting speed of stepper motor stepper motor speed control minutes 16 stalls, the number of smaller, faster the speed. 7.5 degree stepper motor cycle of 7.5 × 4 = 30 degrees, rotating electric lap 12 cycles required resources: p1.0-p1.3 then reverse browser 74ls14, followed by stepper motor output p3.7 then provide a small speaker key tone, p1.4-p1.7 port access keys: lcd1602 insert Tester
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Description:
第一步,打开Adobe_Acrobat_7.0_Pro_KeyGen.exe,将随机产生一个24位的序列号码.复制.
第二步,打开安装程序,点SETUP,在需要输入序列号的时候,将已复制的24位的序列号码,粘贴.
第三步,一路NEXT,选中通过电话激活方式.点NEXT
第四步,在随后产生的28位代码复制到Adobe_Acrobat_7.0_Pro_KeyGen.exe第二行,注意不要带空格
第5步,点Adobe_Acrobat_7.0_Pro_KeyGen.exe 产生激活代码.
第6步,将激活代码填入安装程序 OK
-The first step, open Adobe_Acrobat_7.0_Pro_KeyGen.exe, will generate a random sequence of 24 numbers. Copy. The second step, open the installer, point SETUP, enter the serial number required at the time, will have to copy the serial number 24 and paste. The third step, all the way NEXT, select activation by phone. NEXT-point fourth step, resulting in the following 28 code Adobe_Acrobat_7.0_Pro_KeyGen.exe copied to the second line, not to bring attention to step 5 spaces, points have to activate code Adobe_Acrobat_7.0_Pro_KeyGen.exe. Step 6, activation code will fill in the installation process OK
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Description: 主题：用iText输出PDF报表
内容组织：
1. 自我介绍
2. 简要介绍报表是什么
3. 为什么要输出PDF，介绍PDF的优点
4. 讲解如何输出到PDF，使用iText JAR包
5. 简介iText开源项目的背景
6. iText相关API介绍
7. iText使用步骤
8. 小练习（验证性小程序），现场编程，要求如下：
（1）往PDF文件中加入文字。
（2）定制PDF页面尺寸。
（3）往PDF文件中加入图像文件。
（4）往PDF文件中加入表格。
9. 完成最终目标（建立企业报表输出程序），现场编程，要求如下：
数据库Test中有一个book表，存储了关于图书的信息。建立一个Web程序，在JSP页面上显示一个查询的表单，可以根据图书名称、作者、出版社、价格来查询符合条件的图书信息。JSP页面提供三个按钮，分别是“显示在HTML”，“显示在PDF”，“下载PDF”，根据用户的选择实现不同的功能，如选择第一项，那么就像普通的Web程序一样，在JSP网页上输出查询结果，如果选择第二项，就在页面上显示动态生成的PDF文件，第三项就是下载包含查询结果的PDF文件。显然，第二项是我们的重点工作。
-Topic:Use the iText exportation PDF statement
The contents organize:
1. Introduce myself
2. The synopsis introduction statement is what
3. Why want to output PDF, introduce a PDF advantage
4. Explain in detail how to output PDF, use iText JAR to wrap
5. The brief introduction iText opens the background of source item
6. The iText related API introduce
7. The iText uses a step
8. Small practice(the verification small procedure), the spot plait distance, request as follows:
(1)Go toward to join a writing in the PDF document.
(2)Make to order a PDF page size.
(3)Go toward to join a picture document in the PDF document.
(4)Go toward to join a form in the PDF document.
9. Complete an end target(establishment business enterprise statement output procedure), the spot plait distance, Be request as follows:
There is a book form in the database Test, saved an information concerning book.Build up a Web procedure, show a form and list of search on the JSP page, can search a book inf
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Description: 本手册完整地概述了使用 STEP 7软件配置硬件和通讯连接所涉及的步骤。本手册
旨在为您使用 STEP 7项目描述硬件配置提供支持，并介绍了如何在自动化系统间
建立数据交换。-This manual provides an overview of the full use of STEP 7 hardware configuration and communication software to connect the steps involved. This manual is designed to use the STEP 7 project you describe the hardware configuration to provide support, and describes how to set up the automated data exchange between systems.
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Description: THIS A DESCRIPTION OF FUNCTION BLOCKS IN STEP 7 SIMATICS MANAGER OF PLC S
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Description: PSS/E傻瓜教程
第1章.PSSE概述.doc
第2章.用户界面.doc
第3章.管理潮流界面.doc
第4章.潮流计算.doc
第5章.预想事故分析.doc
第7章 短路故障分析.doc
第8章 平衡开关.doc
-PSS/E step by step tutorial
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Description: this a step 7 program to control a siemens 300 PLC-this is a step 7 program to control a siemens 300 PLC
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Author: ricci |
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Description: STEP7的安装
3.2 SIMATIC 管理器
3.3 STEP7建立项目
3.4 STEP 7帮助系统
3.5 STEP 7标准库
3.6 STEP7练习
-STEP7 installation 3.2 SIMATIC Manager 3.3 STEP 7, item 3.4 the STEP 7 Help System 3.5 STEP 7 Standard Library 3.6 STEP 7 exercises
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Author: 赵龙 |
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Description: 西门子STEP 7 V5.5编程软件在接口通讯问题上的诸多为题的解答与应用-A lot of questions to answer and application of Siemens programming software STEP 7 V5.5 communication problems on the interface
Platform: |
Size: 2169856 |
Author: zhuyunqiang |
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Description: 本书假设你是一个开发谁想要使用Visual Studio 2013和。NET Framework版本4.5.1学习编程与C＃的基础知识。由您完成这本书的时候，你将有一个透彻的了解C＃中，并会用它来建立一个能够通过使用Windows操作系统上运行响应和可扩展的应用程序。
您可以构建和运行在Windows 7中，Windows 8和Windows 8.1的C＃5.0的应用程序，虽然Windows 7和Windows 8提供的用户界面有一些显著的差异。此外，Windows 8.1已经修改了用户界面模型的某些部分，以及旨在利用这些变化的优势，应用程序可能无法在Windows 8上运行，因此，零部件这本书的I至III提供练习和运行使用Windows 7的工作的例子，的Windows 8和Windows 8.1。第四部分着重于使用的Windows 8.1的应用程序开发模型，并在此节中的材料介绍了建立这个新平台的交互式应用程序。-This book assumes that you are a developer who wants to learn the fundamentals of programming with C# by using Visual Studio 2013 and the .NET Framework version 4.5.1. By the time you complete this book, you will have a thorough understanding of C# and will have used it to build responsive and scalable applications that can run by using the Windows operating system.
You can build and run C# 5.0 applications on Windows 7, Windows 8, and Windows 8.1, although the user interfaces provided by Windows 7 and Windows 8 have some significant differences. Additionally, Windows 8.1 has modified some parts of the user interface model, and applications designed to take advantage of these changes might not run on Windows 8. Consequently, Parts I to III of this book provide exercises and working examples that run using Windows 7, Windows 8, and Windows 8.1. Part IV focuses on the application development model used by Windows 8.1, and the material in this section provides an introduction to buildi
Platform: |
Size: 13971456 |
Author: sinker15 |
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Description: Step 2. Pls copy the unzipped files (like the picture 2) to an empty SD card
PS: Pls format the SD card before copy the files here
Step 3. Pls insert the SD card to the GPS SD card slot
Step 4. Turn on the car stereo and press the GPS icon, the unit will be entered into upgrade mode automatically(Pls do not cut down the power during updating)
Step 5: The screen will show “Program Image Success! Reboot System to use new function” when upgrade is done successfully.
Step 6: Take out the SD card GPS SD card slot and turn off the unit and then turn on it.
Step 7: Pls enter into the GPS mode and find its version, if you can see the version has changed to 20131030, that means you have upgrade successfully. Congratulations!
-Step 2. Pls copy the unzipped files (like the picture 2) to an empty SD card
PS: Pls format the SD card before copy the files here
Step 3. Pls insert the SD card to the GPS SD card slot
Step 4. Turn on the car stereo and press the GPS icon, the unit will be entered into upgrade mode automatically(Pls do not cut down the power during updating)
Step 5: The screen will show “Program Image Success! Reboot System to use new function” when upgrade is done successfully.
Step 6: Take out the SD card GPS SD card slot and turn off the unit and then turn on it.
Step 7: Pls enter into the GPS mode and find its version, if you can see the version has changed to 20131030, that means you have upgrade successfully. Congratulations!
Platform: |
Size: 322560 |
Author: hader |
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Description: 1. 基于FLASH PLAYER 8的大头贴拍摄程序 2. 大头贴涂鸦支持 3. 文件上传支持 4. 大头贴相框支持 5. 大头贴合拍 6. 站内留言/短信 7. 前台快速设置头像/删除照片 8. 拍拍之星超级推荐-1. Based on FLASH PLAYER 8 shooting emoticons emoticons graffiti support program 2. 3. 4. Support file upload emoticons support within the frame of step 6. 5. emoticons Message/SMS 7. Reception Quick Setup Picture/delete photos 8. pat Star super recommended
Platform: |
Size: 813056 |
Author: xu |
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