crc任意位生成多項(xiàng)式 任意位運(yùn)算 自適應(yīng)算法 循環(huán)冗余校驗(yàn)碼(CRC，Cyclic Redundancy Code)是采用多項(xiàng)式的 編碼方式，這種方法把要發(fā)送的數(shù)據(jù)看成是一個(gè)多項(xiàng)式的系數(shù) ，數(shù)據(jù)為bn-1bn-2…b1b0 (其中為0或1)，則其對應(yīng)的多項(xiàng)式為： bn-1Xn-1+bn-2Xn-2+…+b１X+b０ 例如：數(shù)據(jù)“10010101”可以寫為多項(xiàng)式 X７+X４+X２+1。 循環(huán)冗余校驗(yàn)CRC 循環(huán)冗余校驗(yàn)方法的原理如下： (1) 設(shè)要發(fā)送的數(shù)據(jù)對應(yīng)的多項(xiàng)式為P(x)。 (2) 發(fā)送方和接收方約定一個(gè)生成多項(xiàng)式G(x)，設(shè)該生成多項(xiàng)式 的最高次冪為r。 (3) 在數(shù)據(jù)塊的末尾添加r個(gè)0，則其相對應(yīng)的多項(xiàng)式為M(x)=XrP(x) 。(左移r位) (4) 用M(x)除以G(x)，獲得商Q(x)和余式R(x)，則 M(x)=Q(x) ×G(x)+R(x)。 (5) 令T(x)=M(x)+R(x)，采用模2運(yùn)算，T(x)所對應(yīng)的數(shù)據(jù)是在原數(shù) 據(jù)塊的末尾加上余式所對應(yīng)的數(shù)據(jù)得到的。 (6) 發(fā)送T(x)所對應(yīng)的數(shù)據(jù)。 (7) 設(shè)接收端接收到的數(shù)據(jù)對應(yīng)的多項(xiàng)式為T’(x)，將T’(x)除以G(x) ，若余式為0，則認(rèn)為沒有錯(cuò)誤，否則認(rèn)為有錯(cuò)
標(biāo)簽： crc CRC 多項(xiàng)式 位運(yùn)算
上傳時(shí)間： 2014-01-16
上傳用戶：hphh
From the point of view of quality management, it is an important issue to reduce the transmission time in the network. The quickest path problem is to 6ndthe path in the network to senda given amount of data from the source to the sink such that the transmission time is minimized.
標(biāo)簽： transmission management the important
上傳時(shí)間： 2013-12-19
上傳用戶：nairui21
THIS book covers the Java™ Native Interface (JNI). It will be useful to you if you are interested in any of the following: • integrating a Java application with legacy code written in languages such as C or C++ • incorporating a Java virtual machine implementation into an existing application written in languages such as C or C++ • implementing a Java virtual machine • understanding the technical issues in language interoperability, in particular how to handle features such as garbage collection and multithreading
標(biāo)簽： Interface you interes Native
上傳時(shí)間： 2013-12-12
上傳用戶：ljmwh2000
Advanced_modelling_in_finance_using_Excel_and_VBA（pdf） The book adopts a step-by-step approach to understanding the more sophisticated aspects of Excel macros and VBA programming, showing how these programming techniques can be used to model and manipulate financial data, as applied to equities, bonds and options. The book is essential for financial practitioners who need to develop their financial modelling skill sets as there is an increase in the need to analyse and develop ever more complex what if scenarios.
標(biāo)簽： Advanced_modelling_in_finance_usi ng_Excel_and_VBA step-by-step approach
上傳時(shí)間： 2013-12-14
上傳用戶：txfyddz
This manual describes how to run the Matlab® Artificial Immune Systems tutorial presentation developed by Leandro de Castro and Fernando Von Zuben. The program files can be downloaded from the following FTP address: ftp://ftp.dca.fee.unicamp.br/pub/docs/vonzuben/lnunes/demo.zip The tour is self-guided and can be performed in any order. To run the presentation, first uncompress the zipped archive and store it in an appropriate directory. Run the Matlab® , enter the selected directory, and type “tutorial” in the prompt.
標(biāo)簽： presentation Artificial describes tutorial
上傳時(shí)間： 2014-01-24
上傳用戶：qilin
用游標(biāo)的方法實(shí)現(xiàn)對稱差的計(jì)算，即 （A-B）+（B-A）
上傳時(shí)間： 2016-05-23
上傳用戶：遠(yuǎn)遠(yuǎn)ssad
This book is a complete reference to the C programming language and the C runtime library. As a Nutshell book, its purpose is to serve as a convenient, reliable companion for C programmers in their day-to-day work. It describes all the elements of the language and illustrates their use with numerous examples.
標(biāo)簽： programming reference the complete
上傳時(shí)間： 2013-12-11
上傳用戶：天誠24
這是個(gè)反向工程delphi的程序的全部源代碼.能分析幾乎所有的結(jié)構(gòu) Revendepro is a program to reverse engineer Delphi program. Revendepro finds almost all structures (classes, types, procedures, etc) in the program, and generates the pascal representation, procedures will be written in assembler. Due to some limitation in assembler the generated output can not be recompiled.
標(biāo)簽： program Revendepro engineer reverse
上傳時(shí)間： 2016-07-21
上傳用戶：songrui
詞法分析器 對輸入一個(gè)函數(shù)，并對其分析main() { int a,b a = 10 b = a + 20 }
上傳時(shí)間： 2013-12-20
上傳用戶：hfmm633
基因算法，用VC++或MATLAB，java等工具設(shè)計(jì)一程序計(jì)算任一個(gè)隨機(jī)產(chǎn)生的DNA基因表達(dá)式的有效長度和值 設(shè)隨機(jī)產(chǎn)生的基因表達(dá)式為： + Q - / b * b a Q b a a b a a b b a a a b
上傳時(shí)間： 2014-01-09
上傳用戶：aa54
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