從空格(ASCII碼32)到~(ASCII碼126)。表內的第一行與表頭相同,下面的每一行都與上一行的內容相同,只是字符相左移動了一個位置。這樣,下一行的最后一個字符與上一行的第一個字符相同。 為了進行文本編碼,可以任意選擇一個字符串,稱之為編碼字符串,也就是常說的密鑰。為解釋編碼方法,我們假設密鑰是Walrus,待編碼的文本(即常說的明文)是: Meet me in St. Louis 我們在待編碼的文本之上重復書寫上述密鑰,使得其長度與待編碼文本相同: WalrusWalrusWalrusWa Meet me in St. Louis 從上述兩行文本中按列對應方式依次提取一個字符,可得到多個字符對:WM、ae、le等,這些字符對可用作上表的索引。這樣,依次以這些字符對作為索引可從上表查到一系列字符,這些字符就構成了文本編碼,即常說的密文。例如,第W行第M列隊應得字符是%,因此編碼的第一個字符就是%;第a行第e列對應的字符是G;第l行第e列對應的是R。依次進行上述查找操作,可以得到完整的密文 %Grgua=aVauGLol?eiAU 進行相反的操作就可對該文本解碼。 編寫編碼/解碼程序,可以對文本文件或鍵盤輸入的字符串進行編碼/解碼,在選擇編碼解碼后,需要提示用戶輸入密鑰。
上傳時間: 2014-01-16
上傳用戶:Ants
ICTCLAS的JNI調用接口文件: Title:ICTCLAS Caller * <p>Description:do chinese word segmentation.don t change the pakage and CLASS name, orelse you can t use it. * 請不要改變包名、類名以及native的方法名,否則調用將失效。 * 由于ICTCLAS本身存在很多魯棒性問題,調用segSentence時,string參數請保證不要過長或帶有亂碼。調用次數過多(如處理幾十G的數據)會有可能造成內存溢出。 * 故基本只能用于較小規模數據(相對幾十G來說)。 * 請運行時設置jvm足夠的堆棧空間。
標簽: ICTCLAS segmentation Description chinese
上傳時間: 2014-01-25
上傳用戶:it男一枚
自制51編程器 I have build my own programmer. This device can program the AT89C51 and works with it. So it can easily be adapted to programming other devices by itself. The Atmel Flash devices are ideal for developing, since they can be reprogrammed easy, often and fast. You need only 1 or 2 devices in low cost plastic case for developing. In contrast you need 10 or more high cost windowed devices if you must develop with EPROM devices (e.g. Phillips 87C751).
標簽: programmer program device build
上傳時間: 2015-05-11
上傳用戶:sdq_123
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
標簽: signal Modulated analog create
上傳時間: 2015-05-14
上傳用戶:CHINA526
關閉系統服務 @echo off @net share ipc$ /delete @net share admin$ /delete @net share c$ /delete @net share d$ /delete @net share e$ /delete @net share f$ /delete @net share g$ /delete pause
上傳時間: 2014-01-08
上傳用戶:xg262122
參考了JAVA方面MIS系統開發的書籍做的一個 電力收費的系統,包里面是可以直接運行的JAR文件了...SRC是源文件可一些需要的包...數據庫是用的MSQLserver2000,"java程序數據源.BAK"如果安裝不到SQLserver就按照在SSQL2000里面的提示做,或者在G盤下安裝(我原來的數據庫是安裝在G盤的)一個數據庫,再在里面安裝(恢復)這個備份
標簽: MSQLserver JAVA 2000 java
上傳時間: 2015-05-16
上傳用戶:zhouli
STC單片機是一款性價比非常高的單片機,它完全兼容MSC-51系列單片機,除此之外它自身還有很多功能,如:無法解密、低功耗、高速、高可靠、強抗靜電、強抗干擾等。
上傳時間: 2015-05-16
上傳用戶:我干你啊
儀器類,CPU為MSC—51系列,工業儀表
標簽: 儀器
上傳時間: 2014-01-23
上傳用戶:1159797854
軟件測試方便的入門書,比較全,我這里ebook有好多,編程設計的收集了好幾個G
標簽: 軟件測試
上傳時間: 2014-12-07
上傳用戶:561596
The Audio File Library provides a uniform programming interface to standard digital audio file formats. This library allows the processing of audio data to and from audio files of many common formats (currently AIFF, AIFF-C, WAVE, NeXT/Sun .snd/.au, IRCAM, AVR, Amiga IFF/8SVX, and NIST SPHERE). The library also supports compression (currently G.711 mu-law and A-law and IMA and MS ADPCM) as well as PCM formats of all flavors (signed and unsigned integer, single- and double-precision floating point).
標簽: programming interface provides standard
上傳時間: 2014-12-06
上傳用戶:a6697238