Description: 1、 一元多项式计算**
任务：能够按照指数降序排列建立并输出多项式；
能够完成两个多项式的相加、相减，并将结果输入；
在上交资料中请写明：存储结构、多项式相加的基本过程的算法（可以使用程序流程图） 、源程序、测试数据和结果、算法的时间复杂度、另外可以提出算法的改进方法；
2、 订票系统
任务：通过此系统可以实现如下功能：
录入：可以录入航班情况（数据可以存储在一个数据文件中，数据结构、具体数据自定）
查询：可以查询某个航线的情况（如，输入航班号，查询起降时间，起飞抵达城市，航班票价，票价折扣，确定航班是否满仓）；
可以输入起飞抵达城市，查询飞机航班情况；
订票：（订票情况可以存在一个数据文件中，结构自己设定）
可以订票，如果该航班已经无票，可以提供相关可选择航班；
退票： 可退票，退票后修改相关数据文件；
客户资料有姓名，证件号，订票数量及航班情况，订单要有编号。
修改航班信息：当航班信息改变可以修改航班数据文件
要求：
根据以上功能说明，设计航班信息，订票信息的存储结构，设计程序完成功能
-1 and polynomials calculation ** tasks : to index descending in accordance with established and output polynomial; to complete the combined two polynomials, subtract, and the results input; in submitted information please specify : storage structure, polynomial together the basic process of the algorithm (which can be used flowchart), the source code, test data and results, the time complexity, it also proposed algorithm improvements; 2, the booking system tasks : through this system can achieve the following functions : recording : flights can be input (data can be stored in a data file, the data structure, specific data set) Inquiries : inquiries can be a route (for example, the importation of flights, the time for landing, take off arrival, flight fares. discount fares, flights to deter Platform: |
Size: 37119 |
Author:Pegasus |
Hits:
Description: X-tree的C++源码，对应文章S. Berchtold, D. A. Keim, H.-P. Kriegel: The X-tree : An Index Structure for High-Dimensional Data. -X-tree in C source code, the corresponding articles S. Berchtold, D. A. Keim. H.-P. Kriegel : The X-tree : An Index Structure for High-Dimensional Data. Platform: |
Size: 30567 |
Author:文 |
Hits:
Description: Please excuse my english... It's so bad :)
Hacker Disassembler Engine, or HDE, is small disassembler engine, which intend to
code analyse. HDE get length of command, prefixes, ModR/M and SIB bytes, opcode,
immediate, displacement, relative address, etc. For example, you can use HDE when
writing unpackers or decryptors executable files, because more others disassemblers
too big, get only disasm listing and aren't intended for code analys, but more simple
length disassemblers usually get too little info. HDE get enough info to analyse, but
it has very small size. HDE package include DLL, objects, headers files and and source.
+ support MMX, SSE, SSE2, SSE3, 3DNow! instructions
+ high-speed & small size (coded in assembler ;)
+ compatibility with most coding language
To disassemble should call hde_disasm function:
DWORD hde_disasm(
void *pCode // pointer to code
HDE_STRUCT *pHDE_STRUCT // pointer to structure HDE_STRUCT
);
Function return length of command and fill structure HDE_STRUCT:
struct HDE_STRUCT
{
BYTE len; // length of command
BYTE p_rep; // rep/repnz/.. prefix: 0xF2 or 0xF3
BYTE p_lock; // lock prefix 0xF0
BYTE p_seg; // segment prefix: 0x2E, 0x36, 0x3E, 0x26, 0x64, 0x65
BYTE p_66; // prefix 0x66
BYTE p_67; // prefix 0x67
BYTE opcode; // opcode
BYTE opcode2; // second opcode, if first opcode equal 0x0F
BYTE modrm; // ModR/M byte
BYTE modrm_mod; // - mod byte of ModR/M
BYTE modrm_reg; // - reg byte of ModR/M
BYTE modrm_rm; // - r/m byte of ModR/M
BYTE sib; // SIB byte
BYTE sib_scale; // - scale (ss) byte of SIB
BYTE sib_index; // - index byte of SIB
BYTE sib_base; // - base byte of SIB
BYTE imm8; // immediate imm8
WORD imm16; // immediate imm16
DWORD imm32; // immediate imm32
BYTE disp8; // displacement disp8
WORD disp16; // displacement disp16, if prefix 0x67 exist
DWORD disp32; // displacement disp32
BYTE rel8; // relative address rel8
WORD rel16; // relative address rel16, if prefix 0x66 exist
DWORD rel32; // relative address rel32
};
Opcode and len fields always exist, others are optional and depend of command. If
field's value equal zero, then it isn't existing.
Note: HDE work only with 32-bit commands of x86 processors !
Platform: |
Size: 23447 |
Author:sys0007 |
Hits:
Description: ************************************************************************ * * * * * THIS IS THE H Y P L A S 2.0 README FILE * * ----------------- * * * * HYPLAS is a finite element program for implicit small and large * * strain analisys of hyperelastic and elasto-plastic two-dimensional * * and axisymmetric solids * * * * HYPLAS v2.0 is the companion software to the textbook: * * EA de Souza Neto, D Peric & DRJ Owen. Computational Methods for * * Plasticity: Theory and Applications. Wiley, Chichester, 2008. * * (www.wiley.com/go/desouzaneto) * * * * Copyright (c) 1998-2008 EA de Souza Neto, D Peric, D.R.J. Owen * *----------------------------------------------------------------------* * File last updated: 18 October 2008 * * * * This file belongs in the directory ../HYPLAS_v2.0 * ************************************************************************ * * * I M P O R T A N T * * * * READ SECTIONS 0 TO 3 OF THIS FILE CAREFULLY BEFORE ATTEMPTING * * TO COMPILE AND RUN THE PROGRAM HYPLAS ON YOUR COMPUTER !! * * * * THE AUTHORS DO NOT GUARANTEE THAT ANY SUGGESTIONS/INSTRUCTIONS * * GIVEN IN THIS README FILE WILL WORK ON ANY PARTICULAR OPERATING * * SYSTEM. IF YOU DECIDE TO FOLLOW ANY SUGGESTIONS/INSTRUCTIONS * * GIVEN HERE YOU MUST DO SO AT YOUR OWN RISK. * * * * * * BUG REPORTS: Please send bug reports to * * * * hyplas_v2.0@live.co.uk * * * * Messages sent to the authors' personal email addresses * * will NOT be answered. * ************************************************************************ This file contains the following sections: 0. Copyright statement and disclaimer 0.(a) Copyright statement 0.(b) Disclaimer 0.(c) Conditions of use 1. Introduction 1.(a) Note on portability 2. Compiling and running HYPLAS 2.(a) Memory requirements 2.(b) Testing a newly compiled executable 3. The HYPLAS directory tree 4. Cross-referencing between the source code and the textbook 5. HYPLAS error messaging 6. Further remarks on HYPLAS ************************************************************************ 0. COPYRIGHT STATEMENT AND DISCLAIMER ================================== 0.(a) Copyright statement ------------------- You may only use this program for your own private purposes. You are not allowed, in any circumstances, to distribute this program (including its source code, executable and any other files related to it, either in their original version or any modifications introduced by you, the authors or any other party) in whole or in part, either freely or otherwise, in any medium, without the prior written consent of the copyright holders. 0.(b) Disclaimer ---------- This program (including its source code, executable and any other files related to it) is provided "as is" without warranty of any kind, either expressed or implied, including, but not limited to, any implied warranties of fitness for purpose. In particular, THIS PROGRAM IS BY NO MEANS GUARANTEED TO BE FREE FROM ERRORS. This program (or any modification incorporated to it by you, the authors or any other party) will run entirely at your risk. The results produced by this program are in no way guaranteed to be fit for any purpose. Under no circumstances will the authors/copyright holders be liable to anyone for damages, including any general, special, incidental or consequential damages arising from the use or inability to use the program (including, but not limited to, loss or corruption of data, failure of the program to operate in any particular way as well as damages arising from the use of any results produced by the program for any purpose). 0.(c) Conditions of use ----------------- You may only use this program if you fully understand and agree with the terms of the above disclaimer. You must not use this program if you do not agree with or do not understand (fully or in part) these conditions of use. 1. INTRODUCTION ============ HYPLAS is a finite element code for small and large strain analysis of hyperelastic and elasto-plastic solids. Most procedures implemented in HYPLAS are described in detail in its companion textbook: EA de Souza Neto, D Peric & DRJ Owen. Computational Methods for Plasticity: Theory and Applications. Wiley, Chichester, 2008 (www.wiley.com/go/desouzaneto). 1.(a) Note on Portability ------------------- HYPLAS has been written in standard ANSI FORTRAN 77. Currently, the only known (and deliberate) exceptions to the FORTRAN 77 ANSI standard are the instructions: INCLUDE '' used in many routines to include the HYPLAS database files (common blocks and global variables), and; CALL GETENV('HYPLASHOME',HYPLASHOME) used in subroutine "ERRPRT" (file ../HYPLAS_v2.0/src/GENERAL/errprt.f). This instruction inquires the name of the system environment variable HYPLASHOME and writes it on the character string HYPLASHOME. This instruction is NOT part of the ANSI FORTRAN 77 standard, but seems to work in most currently available FORTRAN 77 compilers. 2. COMPILING AND RUNNING H Y P L A S ================================== The HYPLAS source code is stored in directory ../HYPLAS_v2.0/src/ (../HYPLAS_v2.0/ being the current directory) and all its subdirectories. To generate an executable file, you just need to compile the FORTRAN source files: ../HYPLAS_v2.0/src/hyplas.f and ../HYPLAS_v2.0/src/*/*.f together. We recommend that the executable HYPLAS be stored in the directory ../HYPLAS_v2.0/bin to which the environment variable HYPLASHOME should be set (see below how to set a system environmental variable). WINDOWS (R) systems ------------------- On Microsoft Windows(R) systems, HYPLAS has been successfully compiled using Intel Visual Fortran Compiler(R) integrated with Microsoft Visual Studio(R). Here you only need to create a project that contains all Fortran source files mentioned above as well as the include files ..\HYPLAS_v2.0\src\*.INC On a Windows XP system, the system environment variable HYPLASHOME can be set as follows: 1. Open a File Manager 2. Right-click on the "My Computer" icon 3. Select "Properties" on the drop-down menu 4. A new window named "System Properties" will pop-up. Here select the "Advanced" tab. 5. On the "Advanced" tab, click the "Environment Variables" button. 6. A new window titled "Environment Variables" will pop-up. Here click the button "New" in the "System Variables" section of the window. 7. A new window will pop-up titled "New System Variable". Here you should fill the fields "Variable name" and "Variable Value", respectively, with HYPLASHOME and the path name (in full) of the directory ..\HYPLAS_v2.0\bin. 8. Press "OK" on the relevant pop-up windows. 9. The next time the computer is REBOOTED, this variable will be set to the correct path and HYPLAS should be able to find the error messages file ERROR.RUN if required. UNIX/LINUX systems ------------------ In a UNIX/LINUX operating system using a C-shell, for instance, the HYPLASHOME environment variable should be set with the command: setenv HYPLASHOME where here denotes the full path to the directory ../HYPLAS_v2.0/bin. To compile HYPLAS (from directory ../HYPLAS_v2.0/src) with a FORTRAN 77 compiler such as g77, you can use the command: g77 -o ../bin/hyplas hyplas.f */*.f Note that the executable file "hyplas" will be stored in the directory ../HYPLAS_2.0/bin (i.e. the directory set in the HYPLASHOME environment variable). Alternatively, you may use the Makefile provided (with suitable modifications, if needed) to create the HYPLAS executable. IMPORTANT: Before generating a HYPLAS executable, read Sections 2.(a) and 2.(b) below. 2.(a) Memory Requirements ------------------- HYPLAS memory requirements depend on the array dimensioning parameters set in files: ../HYPLAS_v2.0/src/ ELEMENTS.INC GLBDBASE.INC MATERIAL.INC MAXDIM.INC Files ELEMENTS.INC, GLBDBASE.INC and MATERIAL.INC contain parameters which are associated with the currently implemented finite elements and materials. DO NOT MODIFY THEM ! unless you are absolutely sure of what you are doing (only developers coding new elements or new material models/analysis types may need to modify them by changing the existing dimensioning parameters and/or including new parameters). The ONLY dimensioning file that can be safely modified by the average user is the file MAXDIM.INC This file contains the array dimensioning parameters related to the maximum permissible dimension of problems to be analysed by HYPLAS. These parameters include the maximum number of nodes, elements, element groups, etc. If necessary, CHANGE THESE PARAMETERS TO SUIT YOUR PROBLEM SIZE/MEMORY REQUIREMENTS before compiling HYPLAS. 2.(b) Testing a newly compiled executable ----------------------------------- After you have successfully compiled the HYPLAS source code and created an executable file, the next step is to run some tests to verify that HYPLAS is working well. To do this, proceed as follows: The directory ../HYPLAS_v2.0/book_examples/data_files contains a series of data files named .dat of benchmarked examples described in the companion textbook. The corresponding (benchmarked) result files are in the directory ../HYPLAS_v2.0/book_examples/result_files This directory contains a series of result files named .res generated with the current version of HYPLAS on a tested platform. All these files have been named such that their names start with the textbook section number where the corresponding example is described. For instance, files 14_9_2_tresca.dat and 14_9_2_tresca.res refer to a problem described in section 14.9.2 of the textbook, and so on. To check that HYPLAS is working well on your platform, after compiling HYPLAS, run the program HYPLAS for the examples of files .dat and compare the newly generated results .res with their benchmarked counterparts (of the same filename) in the result_files directory. To run an example, execute HYPLAS and use the keyboard to enter the name of the corresponding data file in full (including the extension .dat). To compare the benchmarked .res files against their newly generated you may proceed as follows: 1. On MICROSOFT WINDOWS systems - Here we have successfully used the software "ExamDiff" (the task was made particularly easy by selecting "View" and then the "Show Differences Only" option - this refers to version 1.8 of this software). 2. On UNIX/LINUX systems - Here we use the "diff" command from a shell window (and set the option to ignore blank spaces). A shell script may be used to perform this task automatically (including running HYPLAS and checking for result file differences) for all benchmarked examples provided. IMPORTANT: THE ONLY ACCEPTABLE DIFFERENCES BETWEEN A THE NEWLY GENERATED RESULT FILES AND THEIR BENCHMARKED COUNTERPARTS ARE THE DIMENSIONING PARAMETERS (FROM FILE MAXDIM.INC) USED TO COMPILE THE NEW EXECUTABLE (THESE PARAMETERS ARE PRINTED RIGHT AT THE BEGINNING OF THE RESULT FILES) AND NUMERICAL DIFFERENCES IN RESULTS DUE TO NUMERICAL "ROUNDING-OFF" (THESE ARE VERY SMALL DIFFERENCES THAT DEPEND ON THE PRECISION OF ARITHMETIC OPERATIONS IN THE PLATFORM USED). ALSO NOTE THAT THE EXAMPLES OF THE COMPANION TEXTBOOK DO NOT COVER ALL FEATURES OF HYPLAS. HENCE THIS TEST DOES NOT GUARANTEE THAT EVERYTHING IS WORKING PROPERLY. 3. THE H Y P L A S DIRECTORY TREE ================================ 3.(a) Summary ------- ../ HYPLAS_v2.0/ bin/ book_examples/ data_files/ result_files/ man/ html/ src/ CRYSTAL/ DAMAGE/ DAMAGED_ELASTIC/ DRUCKER_PRAGER/ ELASTIC/ ELEMENTS/ GENERAL/ MATERIALS/ MATHS/ MOHR_COULOMB/ OGDEN/ TRESCA/ VON_MISES/ VON_MISES_MIXED/ 3.(b) Description ----------- The HYPLAS program directory tree is organised as follows: ../HYPLAS_v2.0/ (this directory) This is the HYPLAS root directory, where the HYPLAS directory tree starts. ../HYPLAS_v2.0/bin/ This directory contains the file ERROR.RUN where most HYPLAS error/warning messages are. IMPORTANT: the environment variable HYPLASHOME should be set to this directory. Otherwise, HYPLAS will not find its error/warning messages when required. We also recommend that the EXECUTABLE of HYPLAS be stored in this directory. ../HYPLAS_v2.0/book_examples/ This directory has the following subdirectories: ../HYPLAS_v2.0/book_examples/data_files ../HYPLAS_v2.0/book_examples/result_files Refer to Section 2.(b) above for further details. ../HYPLAS_v2.0/man/ This is the HYPLAS documentation/manuals directory. It contains the following files: input_man.txt - A concise input data manual for HYPLAS in ASCII format; hyplas_calltree.txt - Contains a flowgraph (shows the call tree) of HYPLAS in ASCII-format. Note: calls to function subprograms are not included in this flowgraph; and the subdirectory: ../HYPLAS_v2.0/man/html This directory contains the hypertext (HTML) format Fortran source code and of manual pages of the entire HYPLAS program. Manual pages with descriptions of each function/subprogram including their argument list are linked to their corresponding HTML-format source code. This allows the user the navigate through the HYPLAS source code using a web browser. To start at the main program, use your web browser to open the file hyplas.html. This facility should be helpful to those trying to understand the flow of program HYPLAS. ../HYPLAS_v2.0/src/ This directory (and its subdirectories) contains the Fortran source code of HYPLAS. The files containing the sources are named following the standard practice: .f where is the name of the FORTRAN procedure (subroutine, function subprogram, etc.) whose source code is in file .f. The source code of the HYPLAS main program is in file hyplas.f and the HYPLAS database (COMMON blocks, array dimensioning parameters and other global parameters) is coded in the "include files" ELEMENTS.INC GLDBASE.INC MATERIAL.INC MAXDIM.INC in this directory. In addition, this directory contains a file named "Makefile" (UNIX-LINUX Release only) which may be used for compiling and linking HYPLAS in UNIX/LINUX systems. The subdirectories of ../HYPLAS_v2.0/src are as follows: ../HYPLAS_v2.0/src/CRYSTAL Contains the source code of all procedures related to the finite strain single crystal plasticity model implemented in HYPLAS. ../HYPLAS_v2.0/src/DAMAGE Source files of the procedures related to the Lemaitre ductile damage model implementation. ../HYPLAS_v2.0/src/DAMAGED_ELASTIC Source files of the procedures related to the damaged elasticity model with crack closure effect. ../HYPLAS_v2.0/src/DRUCKER_PRAGER Source files of the procedures related to the implemented Drucker-Prager plasticity model. ../HYPLAS_v2.0/src/ELASTIC Source files of the procedures related to the linear elasticity model (Hencky model under large strains) implemented. ../HYPLAS_v2.0/src/ELEMENTS Source files of the element interfaces and element-related procedures. ../HYPLAS_v2.0/src/GENERAL Source files of general procedures. ../HYPLAS_v2.0/src/MATERIALS Source files of the material interfaces. ../HYPLAS_v2.0/src/MATHS Source files of the mathematical procedures. ../HYPLAS_v2.0/src/MOHR_COULOMB Source files of the procedures related to the implemented Mohr-Coulomb plasticity model. ../HYPLAS_v2.0/src/OGDEN Source files of the procedures related to the implemented Ogden hyperelasticity model. ../HYPLAS_v2.0/src/TRESCA Source files of the procedures related to the implemented Tresca plasticity model. ../HYPLAS_v2.0/src/VON_MISES Source files of the procedures related to the implemented von Mises plasticity model with isotropic hardening. ../HYPLAS_v2.0/src/VON_MISES_MIXED Source files of the procedures related to the implemented von Mises plasticity model with mixed isotropic/kinematic hardening. 4. CROSS-REFERENCING BETWEEN THE SOURCE CODE AND THE TEXTBOOK ========================================================== Many references are made in the textbook to various subprograms of HYPLAS. These are usually made when a particular procedure described in the text is implemented in the program. The reader should refer to the textbook index. Also, a substantial number of comment lines have been added to the source code of HYPLAS with reference to sections, figures, boxes, etc of the textbook related to the part of the code in question. Such references are usually displayed after the word "REFERENCE:" (in capitals) on commented lines. Searching for this word will take you to the line of code where the particular routine has a reference to the textbook. NOTE: Occasional references to other textbooks/journal papers are also made following the word "REFERENCE:" on commented lines. 5. HYPLAS ERROR MESSAGING ====================== Most error/warning messages issued by HYPLAS are in the ASCII-format file ERROR.RUN (kept in the HYPLASHOME directory - ../HYPLAS_v2.0/bin). All such error/warning messages have an identification code (e.g. ED0015) which is printed both to the standard output (this is usually the computer screen) and to the relevant results file. If you wish to find where in the source code a particular message is being issued, then perform a search for the corresponding message identification code in the entire source code of HYPLAS. 6. FURTHER REMARKS ON HYPLAS ========================= 6.(a) Program efficiency THIS SECTION IS OF INTEREST ONLY TO THOSE WANTING TO MAKE HYPLAS RUN FASTER. It is particularly stressed in the textbook that this program has not been designed having efficiency in mind (refer to Section 5.1.2 of the textbook). Its structure has been designed mainly to illustrate in a relatively clear manner the computer implementation of the techniques and algorithms described in the text, with a particular view to the implementation of solid constitutive models and finite elements. For those who are especially interested in the speed of the code, there are a few tips that could help in this direction. Unfortunately, these involve modifications to the source code which is probably most appropriate to readers with a good level of experience in finite element programming. To those with this particular interest, we can suggest the following: (i) The use of faster linear solvers This is probably the change that would result in a greater gain in efficiency. The Frontal Method adopted in subroutine FRONT (file ../HYPLAS_v2.0/src/GENERAL/front.f) has been designed originally to save memory (back in the days when computer memory was severely limited). There are currently a vast number of methodologies which focus on speeding up the linear solution, in addition to reducing memory storage requirements (which is a particularly important issue in the solution of large scale problems). Some of these are extensions/refinements of the original Frontal solver. We remark that a number of such procedures (with their respective source codes) are available (conditions may apply) from the LAPACK (Linear Algebra PACKage - http://www.netlib.org/lapack) repository or from the HSL Library (http://www.cse.cse.scitech.ac.uk/nag/hsl). For the reader interested in gaining speed, we would recommend the replacement of the existing solver of FRONT by a faster one. We remark though that this is a substantial programming task. Another aspect here is the fact that computing times in FRONT are directly linked to the frontwidth of the system which, in the present version of HYPLAS is fixed and depends, for a given mesh, on how the degrees of freedom are numbered (node numbering). The incorporation of a frontwidth optimiser (which re-numbers the degrees of freedom in order to minimise the frontwidth) in FRONT could produce some good savings in computing times. Such savings become particularly noticeable in larger problems where the original node numbering produces an excessively large frontwidth. (ii) Material-specific computations The issues pointed out here affect only the computing times for specific material models and are expected to have a much lower impact in overall speed than the linear solver issue discussed above. Some of the material model-specific computations carried out in HYPLAS could be made a bit faster. For example, for isotropic models whose stress update is carried out in the principal stress space (such as the Tresca and Mohr-Coulomb models - see routines SUTR and SUMC, files ../HYPLAS_v2.0/src/TRESCA/sutr.f and ../HYPLAS_v2.0/MOHR_COULOMB/sumc.f, respectively) the spectral decomposition of the stress in carried out in the state update update routine and then repeated in the corresponding routine for computation of the consistent tangent operator (refer to files ../HYPLAS_v2.0/src/TRESCA/cttr.f and ../HYPLAS_v2.0/src/MOHR_COULOMB/ctmc.f, respectively, for the Tresca and Mohr-Coulomb plasticity models). Some savings in computing time can be achieved here by storing the stress eigenprojection tensors (these can be stored as state variables) during the execution of the state updating and then retrieving them later for use in the computation of the consistent tangent operator. This change can be incorporated to the code relatively easily. The computation of the exponential map and is derivative for the single crystal plasticity model (routines EXPMAP, file ../HYPLAS_v2.0/src/CRYSTAL/expmap.f and DEXPMP, file ../HYPLAS_v2.0/src/CRYSTAL/dexpmp.f) is carried out in three dimensions (these routines have been adapted from an earlier three-dimensional code). To improve efficiency, these can be adapted to work only in two-dimensional problems by removing the unnecessary operations related to the third dimension. 6.(b) Output of nodal averaged values The reader should be aware that the way in which nodal averaged values of stresses and other variables are calculated in HYPLAS is very basic (and rudimentary). This feature of the program is made available only to help those interested in producing contour plots, etc from results presented in HYPLAS result files and should be useful in many circumstances of interest. This facility has in fact been used in producing many of the figures presented in the textbook. But note, for example, that the values of incremental plastic multipliers for plasticity models may take (inadmissible) negative values when extrapolated from Gauss-point to nodes and averaged. We remark that more sophisticated and refined techniques of transferring Gauss point values of variables to nodal points and obtaining the corresponding smoothed field are available in the current literature. These fall outside the scope of the companion textbook of HYPLAS. Platform: |
Size: 11008084 |
Author:gtcewli3 |
Hits:
Description: 1、 一元多项式计算**
任务：能够按照指数降序排列建立并输出多项式；
能够完成两个多项式的相加、相减，并将结果输入；
在上交资料中请写明：存储结构、多项式相加的基本过程的算法（可以使用程序流程图） 、源程序、测试数据和结果、算法的时间复杂度、另外可以提出算法的改进方法；
2、 订票系统
任务：通过此系统可以实现如下功能：
录入：可以录入航班情况（数据可以存储在一个数据文件中，数据结构、具体数据自定）
查询：可以查询某个航线的情况（如，输入航班号，查询起降时间，起飞抵达城市，航班票价，票价折扣，确定航班是否满仓）；
可以输入起飞抵达城市，查询飞机航班情况；
订票：（订票情况可以存在一个数据文件中，结构自己设定）
可以订票，如果该航班已经无票，可以提供相关可选择航班；
退票： 可退票，退票后修改相关数据文件；
客户资料有姓名，证件号，订票数量及航班情况，订单要有编号。
修改航班信息：当航班信息改变可以修改航班数据文件
要求：
根据以上功能说明，设计航班信息，订票信息的存储结构，设计程序完成功能
-1 and polynomials calculation** tasks : to index descending in accordance with established and output polynomial; to complete the combined two polynomials, subtract, and the results input; in submitted information please specify : storage structure, polynomial together the basic process of the algorithm (which can be used flowchart), the source code, test data and results, the time complexity, it also proposed algorithm improvements; 2, the booking system tasks : through this system can achieve the following functions : recording : flights can be input (data can be stored in a data file, the data structure, specific data set) Inquiries : inquiries can be a route (for example, the importation of flights, the time for landing, take off arrival, flight fares. discount fares, flights to deter Platform: |
Size: 36864 |
Author:Pegasus |
Hits:
Description: TV-tree的c实现源码，对应原文章K.-I. Lin, H. V. Jagadish, C. Faloutsos: The TV-Tree: An Index Structure for High-Dimensional Data.-TV-tree c achieve the source, the original corresponding article K.-I. Lin, H. V. Jagadish, C. Faloutsos : The TV-Tree : An Index Structure for High-Dimensional Data. Platform: |
Size: 316416 |
Author:文 |
Hits:
Description: X-tree的C++源码，对应文章S. Berchtold, D. A. Keim, H.-P. Kriegel: The X-tree : An Index Structure for High-Dimensional Data. -X-tree in C source code, the corresponding articles S. Berchtold, D. A. Keim. H.-P. Kriegel : The X-tree : An Index Structure for High-Dimensional Data. Platform: |
Size: 30720 |
Author:文 |
Hits:
Description: 用c#+asp.net制作的个人Blog源码,
源码中管理员密码为:111111,运行时需设置一个IIS虚拟目录,
网站后台采用数据库为access,代码中的几个表结构是比较简单的,其核心代码为:index.aspx.cs和几个后台管理代码 其中多次使用DataGrid和DataList,由于时间比较紧,其功能显得尤其简单.-With c#+ Asp.net produced personal Blog source, source code in an administrator password is: 111111, run-time required to set up an IIS virtual directory, website background using the database for access, a few tables in the code structure is relatively simple, the core code: index.aspx.cs and several background management code which have repeatedly used the DataGrid and DataList, relatively tight because of the time, its function is particularly simple. Platform: |
Size: 4096 |
Author:范成 |
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Description: 散列函数源代码,散列表通常是关键字和值对应的数据结构,散列函数用于把关键字映射到相应的数组索引号,由于散列表中每个元素访问到的概率不同,所以应该选用不同的散列函数,以提高程序的查找效率.-Hash function source code, hash table is usually the value of keywords and corresponding data structure, hash function used for the keywords mapped to the corresponding array index number, because each element in the hash table the probability of access to different, so should choose a different hash function in order to improve the efficiency of search procedures. Platform: |
Size: 80896 |
Author:wuzh |
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Description: C51拼音程序源码原作使用了一个二维数组用以查表，我认为这样比较的浪费空间，而且每个字表的索引地址要手工输入，效率不高。所以我用结构体将其改写了一下。就是大家现在看到的这个。-C51 Pinyin program source code using an original two-dimensional array for the lookup table, I think that' s a waste of space, and the index table address of each word should be manually input, the efficiency is not high. So I used the structure of its rewritten a bit. Is that we are now seeing this. Platform: |
Size: 36864 |
Author:bright |
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Description: 进销存管理系统。内容索引:PHP源码,管理系统,进销存,管理系统
一套基于PHP的进销存管理系统，采用b/s结构，软件开源，界面专业，操作方便，可以完成采购管理、供应商管理、销售管理、产品管理、库存管理、客户管理、仓库配置、系统管理以及用户权限管理。对于公司或企业来说，使用PHP的进销存系统也是一个不错的选择。
-Inventory management system. Content index: PHP source code management system, inventory management system
A set of PHP-based inventory management system, b/s structure, open-source software, the interface is professional, easy to operate, you can complete the purchase management, supplier management, sales management, product management, inventory management, customer management, warehouse configuration , system management and user rights management. PHP Invoicing System is a good choice for companies or enterprises. Platform: |
Size: 1320960 |
Author:清理 |
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Description: JSI (Java Spatial Index) RTree Library 是一个RTree算法Java实现的开源库，理论来源是Guttman1984年的一篇论文"R-trees: A Dynamic Index Structure for Spatial Searching" by Antonin Guttman",论文可见(PDF on CiteSeerX).
这个开源项目的代码遵循 GNU Lesser General Public License
最新的代码可以在http://github.com/aled/jsi上找到
同时例子在https://github.com/aled/jsi-examples-The JSI (Java Spatial Index) RTree Library open source Java implementation library of a RTree algorithm theoretical source of the Guttman1984 paper R-trees: A the Dynamic the Index Structure for Spatial, Searching by Antonin Guttman, papers can be seen (PDF onCiteSeerX).
Follow the code of this open source project GNU Lesser General Public License
The latest code can be found in http://github.com/aled/jsi
At the same time example in https://github.com/aled/jsi-examples were Platform: |
Size: 80896 |
Author:pudn |
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Description: In this letter, we propose a simple orthogonal
frequency-division multiplexing (OFDM) scheme for an asynchronous cooperative system, where OFDM is implemented at the source node, and time-reversion and complex conjugation are implemented at the relay nodes. The cyclic prefix (CP) at the source node is used for combating the timing errors the relay nodes.
In this scheme, the received signals at the destination node have the Alamouti code structure on each subcarrier, and thus, it has
the fast symbol-wise ML decoding. It should be emphasized that the relay nodes only need to implement the time-reversion, some sign changes plus to minus, and/or the complex conjugation to the received signals, and no IDFT or DFT operation is needed.It is shown that this simple scheme achieves second-order diversity
gain without the synchronization requirement at the relay nodes.
Index Terms—Alamouti code, asynchronous cooperative diversity,
orthogonal frequency-division multiplexing (OFDM).-In this letter, we propose a simple orthogonal
frequency-division multiplexing (OFDM) scheme for an asynchronous cooperative system, where OFDM is implemented at the source node, and time-reversion and complex conjugation are implemented at the relay nodes. The cyclic prefix (CP) at the source node is used for combating the timing errors the relay nodes.
In this scheme, the received signals at the destination node have the Alamouti code structure on each subcarrier, and thus, it has
the fast symbol-wise ML decoding. It should be emphasized that the relay nodes only need to implement the time-reversion, some sign changes plus to minus, and/or the complex conjugation to the received signals, and no IDFT or DFT operation is needed.It is shown that this simple scheme achieves second-order diversity
gain without the synchronization requirement at the relay nodes.
Index Terms—Alamouti code, asynchronous cooperative diversity,
orthogonal frequency-division multiplexing (OFDM). Platform: |
Size: 106496 |
Author:Hakim |
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Description: LUOBBS是一款基于PHP+MYSQL的小型论坛源码，简洁易用，全程DIV+CSS架构，整站HTML化，良好的内部结构，更适合网站优化推广。 功能简单，测试版本，功能还不完善，供学习参考使用！ inc/conn.php 数据库链接文件 inc/const.php 配置文件 管理地址:admin/index.php -LUOBBS is a small forum based on PHP+ MYSQL source code, simple and easy to use, the whole DIV+ CSS framework, the entire station HTML, a good internal structure, more suitable for website optimization promotion. Function is simple, test version, function is not perfect, for learning reference! Inc/conn.php link file inc/const.php configuration file management address: admin/index.php Platform: |
Size: 96256 |
Author:hoy |
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Search - source code for index structure