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  • 从空格(ASCII码32)到~(ASCII码126)。表内的第一行与表头相同

    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。

    标签: ASCII 126 32 表头

    上传时间: 2014-01-16

    上传用户:Ants

  • ICTCLAS的JNI调用接口文件: Title:ICTCLAS Caller * <p>Description:do chinese word segmentation.do

    ICTCLAS的JNI调用接口文件: Title:ICTCLAS Caller * <p>Description:do chinese word segmentation.don t change the pakage and CLASS name, orelse you can t use it. * 请不要改变包名、类名以及native的方法名,否则调用将失效。 * 由于ICTCLAS本身存在很多鲁棒性问题,调用segSentence时,string参数请保证不要过长或带有乱码。调用次数过多(如处理几十G的数据)会有可能造成内存溢出。 * 故基本只能用于较小规模数据(相对几十G来说)。 * 请运行时设置jvm足够的堆栈空间。

    标签: ICTCLAS segmentation Description chinese

    上传时间: 2014-01-25

    上传用户:it男一枚

  • 自制51编程器 I have build my own programmer. This device can program the AT89C51 and works with it. So i

    自制51编程器 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).

    标签: programmer program device build

    上传时间: 2015-05-11

    上传用户:sdq_123

  • he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with on

    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.

    标签: signal Modulated analog create

    上传时间: 2015-05-14

    上传用户:CHINA526

  • 关闭系统服务 @echo off @net share ipc$ /delete @net share admin$ /delete @net share c$ /delete @net

    关闭系统服务 @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

    标签: delete share net admin

    上传时间: 2014-01-08

    上传用户:xg262122

  • 参考了JAVA方面MIS系统开发的书籍做的一个 电力收费的系统,包里面是可以直接运行的JAR文件了...SRC是源文件可一些需要的包...数据库是用的MSQLserver2000,"java程序数据

    参考了JAVA方面MIS系统开发的书籍做的一个 电力收费的系统,包里面是可以直接运行的JAR文件了...SRC是源文件可一些需要的包...数据库是用的MSQLserver2000,"java程序数据源.BAK"如果安装不到SQLserver就按照在SSQL2000里面的提示做,或者在G盘下安装(我原来的数据库是安装在G盘的)一个数据库,再在里面安装(恢复)这个备份

    标签: MSQLserver JAVA 2000 java

    上传时间: 2015-05-16

    上传用户:zhouli

  • 软件测试方便的入门书

    软件测试方便的入门书,比较全,我这里ebook有好多,编程设计的收集了好几个G

    标签: 软件测试

    上传时间: 2014-12-07

    上传用户:561596

  • The Audio File Library provides a uniform programming interface to standard digital audio file form

    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).

    标签: programming interface provides standard

    上传时间: 2014-12-06

    上传用户:a6697238

  • This comprehensive clear screen tutorial using Java native interface. Teaches you from A-Z how you g

    This comprehensive clear screen tutorial using Java native interface. Teaches you from A-Z how you go about clearing the windows dos console.

    标签: comprehensive interface you tutorial

    上传时间: 2015-05-28

    上传用户:qlpqlq

  • Appliction => rs232测试 应用程式 Driver => usb to rs232 驱动程式(wdm ddk) DLL => 应用程式 Firmware =&g

    Appliction => rs232测试 应用程式 Driver => usb to rs232 驱动程式(wdm ddk) DLL => 应用程式 Firmware => USBtoRS232 硬体韧体

    标签: Appliction 232 gt Firmware

    上传时间: 2015-06-03

    上传用户:yimoney