这个设计是使用Virtex-4实现DDR的控制器的，设计分为三个主要模块：Front-End FIFOs,DDR SDRAM Controller和Datapath Module。其中主要是DDR SDRAM Controller,当然还有测试模块。
上传时间： 2017-05-20
上传用户：llandlu
Playfair Cipher 1.not even the large number of keys in a monoalphabetic cipher provides security 2.one approach to improving security was to encrypt multiple letters 3.the Playfair Cipher is an example 4.invented by Charles Wheatstone in 1854,but named after his friend Baron Playfair Playfair Key Matrix 1.a 5X5 matrix of letters based on a keyword 2.fill in letters of keyword (sans duplicates) 3.fill rest of matrix with other letters Encrypting and Decrypting -plaintext is encrypted two letters at a time 1. if a pair is a repeated letter, insert filler like X’ 2. if both letters fall in the same row, replace each with letter to right (wrapping back to start from end) 3. if both letters fall in the same column, replace each with the letter below it (again wrapping to top from bottom) 4. otherwise each letter is replaced by the letter in the same row and in the column of the other letter of the pair
标签： monoalphabetic Playfair provides security
上传时间： 2017-05-25
上传用户：变形金刚
The most straightforward approximation is the standard Gaussian approximation, where the MAI is approximated by a Gaussian random variable. This approximation is simple, however it is not accurate in general. In situations where the number of users is not large, the Gaussian approximation is not appropriate. In-depth analysis of must be applied. The Holtzman?s improved Gaussian approximation provides a better approximation to the MAI term. The approximation conditions the interference term on the operation condition of each user.
标签： approximation straightforward the Gaussian
上传时间： 2017-06-03
上传用户：dyctj
Uma modelagem de um cenario basico para quem esta aprendendo a usar open/gl na plataforma C++. Utilizando comandos basicos como setas direcionais e teclas especiais como home, end, page up e page down voce pode navegar por todo o ambiente 3D com muita facilidade.
标签： aprendendo plataforma modelagem cenario
上传时间： 2014-12-19
上传用户：ynwbosss
编译课上做的小程序，用四种分析方法分别实现（LL1,算符优先，递归下降，简单词法分析） 完成对正则文法所描述的Pascal语言子集单词符号的词法分析程序。 <标识符>→字母︱ <标识符>字母︱ <标识符>数字 <无符号整数>→数字︱ <无符号整数>数字 <单字符分界符> →+ ︱－ ︱* ︱ ︱(︱) <双字符分界符>→<大于>=︱<小于>=︱<小于>>︱<冒号>=︱<斜竖>* <小于>→< <等于>→= <大于>→> <冒号> →: <斜竖> →/ 识别语言的保留字 ：begin end if then else for do while and or not
上传时间： 2014-06-29
上传用户：sjyy1001
Altera® provides various tools for development of hardware and software for embedded systems. This handbook complements the primary documentation for these tools by describing how to most effectively use the tools. It recommends design styles and practices for developing, debugging, and optimizing embedded systems using Altera-provided tools. The handbook introduces concepts to new users of Altera’s embedded solutions, and helps to increase the design efficiency of the experienced user.
标签： development for provides embedded
上传时间： 2017-06-15
上传用户：haoxiyizhong
C++ C 词法分析器，编译原理， 运行时输入文件（input.txt）路径，文件内容为{}BEGIN FOR(I=0 I<10 I=I+1){} END
标签： 分析器
上传时间： 2013-12-18
上传用户：mikesering
Understanding the Linux Kernel helps readers understand how Linux performs best and how it meets the challenge of different environments. The authors introduce each topic by explaining its importance, and show how kernel operations relate to the utilities that are familiar to Unix programmers and users.
标签： Linux Understanding understand how
上传时间： 2017-06-17
上传用户：ywqaxiwang
Emdros is a text database middleware-layer aimed at storage and retrieval of "text plus information about that text." This information could be linguistic analyses or other annotations. Emdros provides an abstraction of text that makes it well suited to storing /syntactic analyses/ of text, but other linguistic information is supported as well. Emdros comes with a query-language, MQL, that enables powerful queries. Emdros acts as a middleware-layer between a client (not provided) and a database back-end. Currently, PostgreSQL, MySQL, and SQLite (2 and 3) are supported, but other back-ends can easily be added.
标签： text middleware-layer information retrieval
上传时间： 2014-01-02
上传用户：wfeel
In communication systems channel poses an important role. channels can convolve many different kind of distortions to our information. In perticular wireless channels multipath distortion is sevear. and more sevear is such distortion is random. To handle this, multipath affected channels require Equalizers at receaver end. such equalizer uses different learning Algorithms for identifying channels continuously. This project is VHDL implementation of LMS learning algorithm with pipelined architecture. so this implementation can work with higher data rates with less clock speed requirments and so with less power consumpiton It uses Fixed point arithmatic blocks for filtering so suitable for coustom asic.
标签： communication important different channels
上传时间： 2013-12-08
上传用户：litianchu
