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  • RSA算法 :首先, 找出三个数, p, q, r, 其中 p, q 是两个相异的质数, r 是与 (p-1)(q-1) 互质的数...... p, q, r 这三个数便是 person_key

    RSA算法 :首先, 找出三个数, p, q, r, 其中 p, q 是两个相异的质数, r 是与 (p-1)(q-1) 互质的数...... p, q, r 这三个数便是 person_key,接著, 找出 m, 使得 r^m == 1 mod (p-1)(q-1)..... 这个 m 一定存在, 因为 r 与 (p-1)(q-1) 互质, 用辗转相除法就可以得到了..... 再来, 计算 n = pq....... m, n 这两个数便是 public_key ,编码过程是, 若资料为 a, 将其看成是一个大整数, 假设 a < n.... 如果 a >= n 的话, 就将 a 表成 s 进位 (s

    标签: person_key RSA 算法

    上传时间: 2013-12-14

    上传用户:zhuyibin

  • 采用Platform Builder编写的多线程程序

    采用Platform Builder编写的多线程程序,可以在嵌入式操作系统Window CE.NET上运行。本程序在定位导航系统中,显示电子地图和数据采用等多工作需求的场合。

    标签: Platform Builder 编写 多线程

    上传时间: 2014-01-17

    上传用户:yepeng139

  • 采用Platform Builder进行编程

    采用Platform Builder进行编程,可以显示JPEG图像、并读取INI文件。在嵌入式定位导航系统中应用。

    标签: Platform Builder 编程

    上传时间: 2013-12-22

    上传用户:athjac

  • The government of a small but important country has decided that the alphabet needs to be streamline

    The government of a small but important country has decided that the alphabet needs to be streamlined and reordered. Uppercase letters will be eliminated. They will issue a royal decree in the form of a String of B and A characters. The first character in the decree specifies whether a must come ( B )Before b in the new alphabet or ( A )After b . The second character determines the relative placement of b and c , etc. So, for example, "BAA" means that a must come Before b , b must come After c , and c must come After d . Any letters beyond these requirements are to be excluded, so if the decree specifies k comparisons then the new alphabet will contain the first k+1 lowercase letters of the current alphabet. Create a class Alphabet that contains the method choices that takes the decree as input and returns the number of possible new alphabets that conform to the decree. If more than 1,000,000,000 are possible, return -1. Definition

    标签: government streamline important alphabet

    上传时间: 2015-06-09

    上传用户:weixiao99

  • 上下文无关文法(Context-Free Grammar, CFG)是一个4元组G=(V, T, S, P)

    上下文无关文法(Context-Free Grammar, CFG)是一个4元组G=(V, T, S, P),其中,V和T是不相交的有限集,S∈V,P是一组有限的产生式规则集,形如A→α,其中A∈V,且α∈(V∪T)*。V的元素称为非终结符,T的元素称为终结符,S是一个特殊的非终结符,称为文法开始符。 设G=(V, T, S, P)是一个CFG,则G产生的语言是所有可由G产生的字符串组成的集合,即L(G)={x∈T* | Sx}。一个语言L是上下文无关语言(Context-Free Language, CFL),当且仅当存在一个CFG G,使得L=L(G)。 *⇒ 例如,设文法G:S→AB A→aA|a B→bB|b 则L(G)={a^nb^m | n,m>=1} 其中非终结符都是大写字母,开始符都是S,终结符都是小写字母。

    标签: Context-Free Grammar CFG

    上传时间: 2013-12-10

    上传用户:gaojiao1999

  • FPGA很有价值的27实例.rar 包括 LED控制VHDL程序与仿真 2004.8修改.doc; LED控制VHDL程序与仿真; LCD控制VHDL程序与仿真 2004.8修改; LCD控制

    FPGA很有价值的27实例.rar 包括 LED控制VHDL程序与仿真 2004.8修改.doc; LED控制VHDL程序与仿真; LCD控制VHDL程序与仿真 2004.8修改; LCD控制VHDL程序与仿真; ADC0809 VHDL控制程序; TLC5510 VHDL控制程序; DAC0832 接口电路程序; TLC7524接口电路程序; URAT VHDL程序与仿真; ASK调制与解调VHDL程序及仿真; FSK调制与解调VHDL程序及仿真; PSK调制与解调VHDL程序及仿真; MASK调制VHDL程序及仿真; MFSK调制VHDL程序及仿真; MPSK调制与解调VHDL程序与仿真; 基带码发生器程序设计与仿真; 频率计程序设计与仿真; 采用等精度测频原理的频率计程序与仿真; 电子琴程序设计与仿真 2004.8修改; 电子琴程序设计与仿真; 电梯控制器程序设计与仿真; 电子时钟VHDL程序与仿真; 自动售货机VHDL程序与仿真; 出租车计价器VHDL程序与仿真 2004.8修改; 出租车计价器VHDL程序与仿真; 波形发生程序; 步进电机定位控制系统VHDL程序与仿

    标签: VHDL 2004.8 LED LCD

    上传时间: 2013-12-22

    上传用户:啊飒飒大师的

  • We have a group of N items (represented by integers from 1 to N), and we know that there is some tot

    We have a group of N items (represented by integers from 1 to N), and we know that there is some total order defined for these items. You may assume that no two elements will be equal (for all a, b: a<b or b<a). However, it is expensive to compare two items. Your task is to make a number of comparisons, and then output the sorted order. The cost of determining if a < b is given by the bth integer of element a of costs (space delimited), which is the same as the ath integer of element b. Naturally, you will be judged on the total cost of the comparisons you make before outputting the sorted order. If your order is incorrect, you will receive a 0. Otherwise, your score will be opt/cost, where opt is the best cost anyone has achieved and cost is the total cost of the comparisons you make (so your score for a test case will be between 0 and 1). Your score for the problem will simply be the sum of your scores for the individual test cases.

    标签: represented integers group items

    上传时间: 2016-01-17

    上传用户:jeffery

  • fpga很有价值的27实例

    fpga很有价值的27实例,包括步进电机定位控制系统VHDL程序与仿真、ASK调制与解调VHDL程序及仿真、TLC7524接口电路程序等非常实用。

    标签: fpga 价值

    上传时间: 2016-08-12

    上传用户:璇珠官人

  • 实现了基于COM组件式GIS技术及导航数字地图的二次开发

    实现了基于COM组件式GIS技术及导航数字地图的二次开发,设计开发出PDA定位导航系统的主要模块。

    标签: COM GIS 导航 二次开发

    上传时间: 2014-01-17

    上传用户:jiahao131

  • 汉诺塔!!! Simulate the movement of the Towers of Hanoi puzzle Bonus is possible for using animation

    汉诺塔!!! Simulate the movement of the Towers of Hanoi puzzle Bonus is possible for using animation eg. if n = 2 A→B A→C B→C if n = 3 A→C A→B C→B A→C B→A B→C A→C

    标签: the animation Simulate movement

    上传时间: 2017-02-11

    上传用户:waizhang