一种通过自组织竞争学习网络实现数据降维和可视化的单层神经网络模型。用此算法可以把输入空间的多维映射到低维的(一维或者二维)的离散网络上,并将保持相同性质的输入数据在映射到低维空间时的拓扑一致性。iris以及LETTER两个数据集进行分类
上传时间: 2016-09-03
上传用户:Andy123456
词法分析 1 试验目的 设计,编制并调试一个此法分析程序,加深对此法分原理的理解. 2 试验要求 1)待分析的简单语言的词法 * 关键字: begin if then while do end 所有关键字都是小写. 2)运算符和界符: : = + * - / < <= <> > >= = ( ) # 3)其他单词是标识符(ID)和整数型常数(NUM),通过一下正规式定义: ID=LETTER (LETTER|digit)* NUM=digit digit* 4)空格由空白,制表符和换行符组成,空格一般用来分隔ID,NUM,运算符,界符和关键字,此法分析阶段通常被忽略. 3 各种单词符号对应的种别码如表所示
上传时间: 2017-01-08
上传用户:dongqiangqiang
程序接收用户键入的一行字符(字符长度不大于80个,以回车结束),并把字符,数字,其它字符分类计数,然后将结果存入以LETTER,Digit,Other为名的存储单元中。
上传时间: 2013-12-20
上传用户:yy541071797
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
1、 选择合适的SCI期刊-Choose a journal。结合专业知识、2008或2007年度影响因子表和他人经验来综合选择要投递的期刊,并进入该期刊查询系统查询近年来的文章走向。 2、 下载Introduction for submission。只要到每个杂志的首页,打开submit paper一栏,点击Introduction查看或下载即可。 3、 稿件及其相关材料准备-Preparation:Manuscript.doc、Tables.doc、Figures.tiff(jpg等)、Cover LETTER,有时还有Title page、Copyright agreement、Conflicts of interest等。
标签: 论文
上传时间: 2018-08-17
上传用户:pengke871218