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Description: 从空格(ASCII码32)到~(ASCII码126)。表内的第一行与表头相同，下面的每一行都与上一行的内容相同，只是字符相左移动了一个位置。这样，下一行的最后一个字符与上一行的第一个字符相同。
为了进行文本编码，可以任意选择一个字符串，称之为编码字符串，也就是常说的密钥。为解释编码方法，我们假设密钥是Walrus，待编码的文本（即常说的明文）是：
Meet me in St. Louis
我们在待编码的文本之上重复书写上述密钥，使得其长度与待编码文本相同：
WalrusWalrusWalrusWa
Meet me in St. Louis
从上述两行文本中按列对应方式依次提取一个字符，可得到多个字符对：WM、ae、le等，这些字符对可用作上表的索引。这样，依次以这些字符对作为索引可从上表查到一系列字符，这些字符就构成了文本编码，即常说的密文。例如，第W行第M列队应得字符是%，因此编码的第一个字符就是%；第a行第e列对应的字符是G；第l行第e列对应的是R。依次进行上述查找操作，可以得到完整的密文
%Grgua=aVauGLol?eiAU
进行相反的操作就可对该文本解码。
编写编码/解码程序，可以对文本文件或键盘输入的字符串进行编码/解码，在选择编码解码后，需要提示用户输入密钥。
-from space (ASCII 32) to ~ (ASCII 126). The schedule of the first line with the same head table, each of the rows below the previous line with the same content. Character movement is a curator position. So, the next line of characters with a final party on the first character of the same. To text encoding, can choose an arbitrary string, the string as coding, which is often said that the key. To explain the encoding method, we assume that key is Walrus when coding the text (often said that an express) : Meet me in St.. Louis coding in question above the text written above key repeat, making its length and text encoding the same question : WalrusWalrusWalrusWa Meet me in St.. Louis from the above two OK text counterpart way out by the extraction followed a character, a number of characters
Platform: |
Size: 1879 |
Author: 梁清华 |
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Description: OpenSG is a scenegraph system for realtime rendering, e.g. for Virtual Reality applications. It is just a library, not a full application.
This documentation contains descriptions of the internal classes and concepts, as well as a tutorial that explains how to use the system.-OpenSG is a system for realtime scenegraph rendering. e.g. for Virtual Reality applications. It is ju st a library, not a full application. This documentation con tains descriptions of the internal classes and concepts, as well as a tutorial that explains how to use the system.
Platform: |
Size: 1455149 |
Author: 郭家 |
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Description: 根据城市交通路网建设的实际, 研究了描述城市交通网络图的城市道路数据库的组织结构, 在此数据
结构的基础上依靠G IS 技术的支持, 采集了大量具体道路信息, 采用D ijk st ra 算法实现了快速最短路径搜索。根
据城市的交通状况对交通网络图的边值赋予不同的权值可实现最优路径搜寻, 给出了一个搜索实例——一个包
含61 个交通路口的最短路径搜索结果的搜索时间约为1. 1
Platform: |
Size: 183097 |
Author: 王功臣 |
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Description: 从空格(ASCII码32)到~(ASCII码126)。表内的第一行与表头相同，下面的每一行都与上一行的内容相同，只是字符相左移动了一个位置。这样，下一行的最后一个字符与上一行的第一个字符相同。
为了进行文本编码，可以任意选择一个字符串，称之为编码字符串，也就是常说的密钥。为解释编码方法，我们假设密钥是Walrus，待编码的文本（即常说的明文）是：
Meet me in St. Louis
我们在待编码的文本之上重复书写上述密钥，使得其长度与待编码文本相同：
WalrusWalrusWalrusWa
Meet me in St. Louis
从上述两行文本中按列对应方式依次提取一个字符，可得到多个字符对：WM、ae、le等，这些字符对可用作上表的索引。这样，依次以这些字符对作为索引可从上表查到一系列字符，这些字符就构成了文本编码，即常说的密文。例如，第W行第M列队应得字符是%，因此编码的第一个字符就是%；第a行第e列对应的字符是G；第l行第e列对应的是R。依次进行上述查找操作，可以得到完整的密文
%Grgua=aVauGLol?eiAU
进行相反的操作就可对该文本解码。
编写编码/解码程序，可以对文本文件或键盘输入的字符串进行编码/解码，在选择编码解码后，需要提示用户输入密钥。
-from space (ASCII 32) to ~ (ASCII 126). The schedule of the first line with the same head table, each of the rows below the previous line with the same content. Character movement is a curator position. So, the next line of characters with a final party on the first character of the same. To text encoding, can choose an arbitrary string, the string as coding, which is often said that the key. To explain the encoding method, we assume that key is Walrus when coding the text (often said that an express) : Meet me in St.. Louis coding in question above the text written above key repeat, making its length and text encoding the same question : WalrusWalrusWalrusWa Meet me in St.. Louis from the above two OK text counterpart way out by the extraction followed a character, a number of characters
Platform: |
Size: 2048 |
Author: 梁清华 |
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Description: OpenSG is a scenegraph system for realtime rendering, e.g. for Virtual Reality applications. It is just a library, not a full application.
This documentation contains descriptions of the internal classes and concepts, as well as a tutorial that explains how to use the system.-OpenSG is a system for realtime scenegraph rendering. e.g. for Virtual Reality applications. It is ju st a library, not a full application. This documentation con tains descriptions of the internal classes and concepts, as well as a tutorial that explains how to use the system.
Platform: |
Size: 1455104 |
Author: |
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Description: 根据城市交通路网建设的实际, 研究了描述城市交通网络图的城市道路数据库的组织结构, 在此数据
结构的基础上依靠G IS 技术的支持, 采集了大量具体道路信息, 采用D ijk st ra 算法实现了快速最短路径搜索。根
据城市的交通状况对交通网络图的边值赋予不同的权值可实现最优路径搜寻, 给出了一个搜索实例——一个包
含61 个交通路口的最短路径搜索结果的搜索时间约为1. 1-Urban traffic network in accordance with the actual building, research describing the urban traffic of the urban road network structure of the database, in this data structure based on G IS techniques rely on the support, collecting a large number of specific road information, the use of D ijk st ra algorithm to achieve a fast shortest path search. According to city traffic conditions on the transport network map boundary value given different weights to achieve optimal path search, a search examples are given- one that contains 61 traffic junctions of the shortest path search results of the search time is about 1. 1
Platform: |
Size: 183296 |
Author: 王功臣 |
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Description: ST公司GPS设计方案,全球卫星定位系统gp新手必备。包括10多个文档资料。-ST Company GPS design, global satellite positioning system must gp novice. Including more than 10 documentation.
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Size: 7987200 |
Author: 小黑 |
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Description: Broadband MIMO-OFDM Wireless Communications
Gordon L. St¨uber, John Barry, Steve W. McLaughlin, Ye (Geoffrey) Li, Mary Ann Ingram, Thomas G.
Pratt
School of Electrical and Computer Engineering
Georgia Institute of Technology
Atlanta, GA 30332
Platform: |
Size: 605184 |
Author: samalqudah |
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Description: 提 出了基于修正空间 时频分布( S TF D) 矩阵 的 ES P RI T算法 以实现 对宽 带线性调 频信号 的到达
角估计-Th e a l g or i t h m f o r di r e c t i o n- o f- a r r i va l o f t he wi d e ba n d c hi r p s i gna l s ba s e d 0 1 3 ．ESPRI T u s i n g
t he mo di f i e d s p a t i a l t i me- f r e q ue n c y ma t r i x i S pr e s e nt e d．The mod i f i e d STFD ma t r i x whi c h h as t he s i mi l ar
ma t he ma t i c a l c on st r uc t i o n wi t h t he c o va r i a nc e ma t r i x c a n be ob t a i ne d wi t h t h e c r o s s W i gn e r- Vi l l e
di s t r i but i o ns o f t he o ut pu t s of t he ar r a y．Unde r t he c o nd i t i on of un i f o r m l i n e a r r a y，t he mo di f i e d STFD
ma t r i x c a n b e t r a n s f or me d i nt o t he ma t r i x wh i c h h a s t he pr op e r t y of r ot a t i on a l i nva r i a nc e ． The n t he
ESPRI T c a n be a p pl i e d t o D O A e s t i ma t i on
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Size: 145408 |
Author: fjp119 |
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Description: 基于STM8系列单片机的DALI总线协议开发包（C语言程序）。单片机STM8S105，DALI总线从机程序。-DALI slave library comes with simple application example (DALI slave device). It was
designed (and tested) for use with this evaluation hardware: STM8S Discovery board (see
UM0817- STM8S Discovery User manual on www.st.com/mcu) together with DALI
transceiver board. Application example controls the luminance of the on-board LED diode.
Light intensity is controlled by PWM method using built-in Timer. As DALI master device
can be used ST7DALI evaluation kit (board and PC software- see www.st.com/mcu) or some
commercial DALI controller (e.g. from Osram).
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Size: 4355072 |
Author: jll |
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Description: 高速 D／ A转换器的动态参数测试方法进行了理论分析和测试实践。通过编程， 由逻辑分析仪给 D ／ A转换器提供单一频率的数字正弦波和时钟信号；通过频谱分析仪， 对 D／ A转换器输出模拟信号采样， 进行快速傅里叶变， 分析得到 D／ A转换器
的动态参数特性。实验证明， 该方法能快速测试高速 D ／ A转换器的动态参数， 在 实际应用中可获
得 良好的效果。- Us i n g l o g i c a n a l y z e r a n d s p e c t r o me t e r ，t h e o r e t i c a l a n a l y s i s a n d e x p e r i me n t s a r e e on d u c t e d t o s t u d y t h e t e c h —
n i q u e f o r t e s t i n g d y n a mi c p a r a me t e r s o f h i g h- s p e e d D ／ A c o n v e r t e r s ． Th e l o g i c a n a l y z e r p r o v i d e s d i g i t a l s i n e w a v e s w i t h s i n —
g l e f r e q u e n c y f or t h e D／ A c o n v e r t e r ．n e s p e c t r ome t e r s a mp l e s o u t p u t a n a l o g s i g n a l s o f t h e D／ A c o n v e r t e r a nd i mp l e me n t s
F Frt o o b t a i nd y n a mi c p a r a me t e r s ．Th e e x p e r i me n t d e m o n s t r a t e s t h a tt h i s me t h o di s af a s twa yt ot e st d y n a mi c p a r a me t e r s
o f h ig h- s p e e d D／ A c o n v e r t e r s ，a n d g o o d r e su l t s c a n b e a c h ie v e d i n a c
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Size: 158720 |
Author: tianzhen |
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Description: 新一代高性能无人机飞控系统的研究与设计
张小林 赵宇博 范力思-I n o r de r t o cau se t he U A V f lig ht co nt r o l sy st e m has t he f o r mida ble da t a- ha ndling ca pa cit y , t h e lo w po we r lo ss , t he st r o ng
f le x ibilit y an d a hig he r int e g r at io n r a t e, pr o po sed o ne kind of t e chn ol og y ba sed on SO P C w hic h ca n so lv e t hes e p r ob lem s o n U A V f lig ht co n
t r o l sy st e m. T r a nsf e r s m any N io s so f t pr o c ess o r . A lt e r a br in gi ng t he I P co r e a s w el l as t he per ip her y ha r dw a r e cir c uit . on e kind o f h ig h
per f o r man ce f lig ht co nt r o l sy st em h as be en de sig ned. Co mpa r e s w it h t he t r a diti on al U A V co nt r o l sy s te m, t his o ne hav e ve r y st r o ng dat a handl ing capa cit y , t h e sma ll v o lume a nd lo w po w e r lo s s. T he a ct ua l fl ig ht r esul t indic at e d : Ea ch m odu la r de sig n is r ea so nab le, t he o ve r al l
sy st em mo v e ment is st a ble. T his sy st e m ca n b e ser ve d a s t he ne x t g ene r
Platform: |
Size: 620544 |
Author: 天下 |
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Description: 2.4Ghz 无线通信底层驱动模块 可实现mac层通信 NRF24L01-- Add the required Library files :
- stm32f10x_can.c
- stm32f10x_exti.c
- stm32f10x_gpio.c
- stm32f10x_rcc.c
- stm32f10x_usart.c
- misc.c
- stm32f10x_i2c.c
- stm32f10x_spi.c
- stm32_eval.c (under Utilities\STM32_EVAL)
- system_stm32f10x.c (under Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x)
Platform: |
Size: 51200 |
Author: NANKUN |
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Description: ST903双模程序-调试程序STM903M8S-<?xml version= 1.0 encoding= UTF-8 standalone= true ?>
<! eternity persistence framework >
<! Nicola Santi- www.winghands.it >
-<archive sub= beta1 version= 4.0 >
<! ST Plotter R5 archive file >
<version>1.0.2</version>
-<model>
-<groups count= 1 >
<group count= 0 name= Signals > </group>
</groups>
-<markers count= 1 >
<marker name= MainMarker time= 0 r= 0 g= 0 b= 255 alpha= 255 />
</markers>
</model>
-<workspace>
<active_group>Signals</active_group>
-<time>
<time_min>0</time_min>
<time_max>0</time_max>
<time_pos>0</time_pos>
<time_range>578</time_range>
</time>
-<window top= 174 right= 996 left= 132 bottom= 776 >
<header_width>250</header_width>
</window>
</workspace>
</archiv
Platform: |
Size: 145408 |
Author: zjm |
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