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Description: Xcopy 选项：
/a 包含属性
/b 备份模式（只拷贝设置为归档属性的文件）
/c 把目标文件的创建日期设置为当前文件日期
/e 包含创建空目录
/f 刷新已存在文件（只拷贝已存在的文件）
/h 拷贝隐含文件
/p 对每个文件/目录都进行确认
/q 简洁模式
/r 多盘拷贝（如果目标盘为A-E且容量小于2M时会被提问）
/s 包含子目录
/u 更新模式（只拷贝新文件）
/v 校检目标文件，速度缓慢
/w 窗口模式
/x 文件名 不包括该文件名的文件（可使用通配符）
/y 目录名 不包含该目录名的文件（同/x，隐含/s参数）-Xcopy options : / attribute contains a / b backup mode (only copy archive attribute set to the document) / c target date of the founding documents set to the current date of the document / e consists of creating empty directory / f update existing documents (only copy of the document has been in existence) / h copy hidden files / p for each file / directory have confirmation / q concise model / r multi-disk copies (if the target set for A-E a capacity of less than 2M will be questions) / s contains subdirectories / u update mode (only copy new files) / v calibration target file, slow speed / w window mode / x documents were not included in the file name in the paper (can use wildcards) / y name of the directory does not contain the name of the directory the file (with the / x, implied / s
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Size: 34964 |
Author: sunwei |
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Description: 移位密码、代换密码的加密及解密
实现移位密码：k表示26个字母向前循环位移的字符个数
加密：
输入：k，以及小写表示的明文字母，输出：大写字母表示的密文
解密：输入： k，以及大写字母表示的密文，输出：小写字母表示的明文
例如，当k=11时
明文：wewillmeetatmidnight
密文：HPHTWWXPPELEXTOYTRSE
实现代换密码
例如输入密匙guangzhouuniversity，则建立字母对应关系：
a b c d e f g h i j K l m
G U A N Z H O I V E R S T
n o p q r s t u v w X y z
Y B C D F J K L M P Q W X
字母对应关系的说明:把密匙按照a-z的顺序对应,去掉重复字母,如guangzhouuniversity中的g第二次出现时被滤掉, 在n对应Y之后,把在密匙中没出现过的其他字母按顺序排列:BCDFJ……
-translocation password substitution password encryption and decryption of achieving shift Password : k said 26 letters forward displacement cycle of the number of characters encryption : Admission : k, and explicitly expressed in lowercase letters, output : capital letters said the ciphertext declassified : Admission : k, and the uppercase letters dense text output : lowercase letters explicitly said for example, when k = 11:00 explicit : wewillmeetatmidnight dense text : HPHTWWXPPELEXTOYTRSE achieve import substitution such as password key guangzho uuniversity, the establishment of correspondence between letters : a b c d e f g h i j k l m G U A N Z H O R E V I S T n o p q r s t u v w x y z Y B C D F J K L M P Q W X correspondence between letters Note : In accordance with a key put-z corr
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Author: 何志 |
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Description: 商业单位需要容易记忆的电话号码，有一些方法可以让电话号码变得更容易记忆。譬如，可以把电话号码写成单词或短语，如 TUT-GLOP 可以代表滑铁卢大学的电话。有时仅仅是把号码的一部分写成单词，如打 310-GINO 便可向 GINO 比萨饼店定购比萨。另一种让电话号码容易记忆的方法是将数字用一种容易记的方式组合起来，譬如 3-10-10-10 也可以代表 GINO 比萨饼店。
电话号码的标准形式是七位十进制数字，在它的第三位和第四位之间用连字符连接(例如：888-1200)。电话的键盘提供了字符于数字之间的映射关系，如下所示：
2
A、B和C
3
D、E和F
4
G、H和I
5
J、K和L
6
M、N和O
7
P、R和S
8
T、U和V
9
W、X和Y
Q 和 Z 没有映射到键盘，而连字符不需要被拨打并且可以根据需要添加和删除。TUT-GLOP 的标准形式是 888-4567，310-GINO 的标准形式是310-4466，3-10-10-10的标准形式也是 310-1010。
如果两个电话号码有相同的标准形式，那么这两个电话号码是相同的。-commercial units need easy to remember telephone numbers, there are ways to allow more telephone numbers easy to remember. For example, telephone numbers can be written words or phrases, such as pseudodynamic - GLOP can represent the University of Waterloo calls. Sometimes numbers is only part of the written word. if the fight 310-GINO will be able to GINO pizza shop ordering pizza. Another phone number so easy to remember the method is to use a number of easy to remember the combination. For example 3-10-10-10 can also represent GINO pizza shop. The telephone number is the standard form seven decimal digits. in its third and fourth between connecting with characters (for example 888-320-4234-1200). Telephone keyboard characters in the digital mapping between, as follows : 2 A, B and C, D,
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Size: 925 |
Author: 张日天 |
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Description: 代入法的启发示搜索
我的代码实现是：按照自然语言各字母出现频率的大小从高到低（已经有人作国统计分析了）先生成一张字母出现频率统计表（A）--------(e),(t,a,o,i,n,s,h,r),(d,l),(c,u,m,w,f,g,y,p,b),(v,k,j,x,q,z)
，再对密文字母计算频率，并按频率从高到低生成一张输入密文字母的统计表（B），通过两张表的对应关系，不断用A中的字母去替换B中的字母，搜索不成功时就回退，在这里回朔是一个关键。
-generation into a search of inspiration I said a code is : According to the Natural Language alphabet frequency of the size of precedence (has been for the State Statistical Analysis), Mr. into an alphabet frequency tables (A )--------( e), (t, a, o, i, n, s, h r), (d, l), (c, u, m, w, f, g, y, p, b), (v, k, j, x, q, z), again close to the mother language calculated frequency and frequency input precedence generate a secret letter to the mother TAB (B), Table 2 by the corresponding relations, use of the letters A to B to replace the letters of the alphabet, when unsuccessful search regression, Here is a retrospective key.
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Size: 3971 |
Author: rtshen |
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Description: 实现最优二叉树的构造；在此基础上完成哈夫曼编码器与译码器。 假设报文中只会出现如下表所示的字符：
字符 A B C D E F G H I J K L M N
频度 186 64 13 22 32 103 21 15 47 57 1 5 32 20 57
字符 O P Q R S T U V W X Y Z ， ．
频度 63 15 1 48 51 80 23 8 18 1 16 1 6 2
要求完成的系统应具备如下的功能：
1．初始化。从终端（文件）读入字符集的数据信息，。建立哈夫曼树。
2．编码：利用已建好的哈夫曼树对明文文件进行编码，并存入目标文件（哈夫曼码文件）。
3．译码：利用已建好的哈夫曼树对目标文件（哈夫曼码文件）进行编码，并存入指定的明文文件。
4．输出哈夫曼编码文件：输出每一个字符的哈夫曼编码。
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Size: 132535 |
Author: 张娟 |
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Description: !逐步回归分析程序：
! M：输入变量，M=N+1，其中N为自变量的个数；M包括的因变量个数
! K：输入变量，观测点数；
! F1：引入因子时显著性的F-分布值；
! F2：剔除因子时显著性的F-分布值；
! XX：存放自变量和因变量的平均值；
! B：存放回归系数；
! V：存放偏回归平方和和残差平方和Q；
! S：存放回归系数的标准偏差和估计的标准偏差；
! C：存放复相关系数；
! F：存放F-检验值；
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Size: 2290 |
Author: wang hanting |
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Description: This code is described in \"Computational Geometry in C\" (Second Edition),
Chapter 7. It is not written to be comprehensible without the
explanation in that book.
This program reads a polygon P followed by query points from stdin.
The input format is:
n
x0 y0
x1 y1
...
xn-1 yn-1
qx qy
qx qy
qx qy
...
For each query point q, InPoly returns one of four char s:
i : q is strictly interior to P
o : q is strictly exterior to P
v : q is a vertex of P
e : q lies on the relative interior of an edge of P
These represent mutually exclusive categories.
For an explanation of the code, see Chapter 7 of
\"Computational Geometry in C (Second Edition).\"
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Author: fds |
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Description: Digital Signature Algorithm (DSA)是Schnorr和ElGamal签名算法的变种，被美国NIST作为DSS(DigitalSignature Standard)。算法中应用了下述参数：
p：L bits长的素数。L是64的倍数，范围是512到1024；
q：p - 1的160bits的素因子；
g：g = h^((p-1)/q) mod p，h满足h < p - 1, h^((p-1)/q) mod p > 1；
x：x < q，x为私钥 ；
y：y = g^x mod p ，( p, q, g, y )为公钥；
H( x )：One-Way Hash函数。DSS中选用SHA( Secure Hash Algorithm )。
p, q, g可由一组用户共享，但在实际应用中，使用公共模数可能会带来一定的威胁。签名及验证协议如下：
1. P产生随机数k，k < q；
2. P计算 r = ( g^k mod p ) mod q
s = ( k^(-1) (H(m) + xr)) mod q
签名结果是( m, r, s )。
3. 验证时计算 w = s^(-1)mod q
u1 = ( H( m ) * w ) mod q
u2 = ( r * w ) mod q
v = (( g^u1 * y^u2 ) mod p ) mod q
若v = r，则认为签名有效。
DSA是基于整数有限域离散对数难题的，其安全性与RSA相比差不多。DSA的一个重要特点是两个素数公开，这样，当使用别人的p和q时，即使不知道私钥，你也能确认它们是否是随机产生的，还是作了手脚。RSA算法却作不到。
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Size: 136954 |
Author: wildkaede |
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Description: 很Q的播放器,delphi开发的-very players, the development of delphi
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Size: 99328 |
Author: 欧阳少宇 |
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Description: 这是一个学生成绩管理系统，其中“I”表示插入，“L”表示浏览，“Q”表示查询，
“E”表示退出，“D”表示删除，“M”表示修改,"c"表示统计各分数段人数,"p"表示打印.
本程序实现了：
-This is a performance management system for students, "I" to insert said, "L" said View, "Q" said inquiries, "E" from "D" to delete said, "M" said the amendments "c" indicates a statistical fraction of the number of "p" said Print. the program : This is a performance management system for students, "I" to insert said, "L" said View, "Q" said inquiries, "E" from "D" to delete said, "M" said the amendments, "c", said the statistics of the number of scores, "p" said Print. the program :
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Size: 7168 |
Author: 小强 |
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Description: Digital Signature Algorithm (DSA)是Schnorr和ElGamal签名算法的变种，被美国NIST作为DSS(DigitalSignature Standard)。算法中应用了下述参数：
p：L bits长的素数。L是64的倍数，范围是512到1024；
q：p - 1的160bits的素因子；
g：g = h^((p-1)/q) mod p，h满足h < p - 1, h^((p-1)/q) mod p > 1；
x：x < q，x为私钥 ；
y：y = g^x mod p ，( p, q, g, y )为公钥；
H( x )：One-Way Hash函数。DSS中选用SHA( Secure Hash Algorithm )。
p, q, g可由一组用户共享，但在实际应用中，使用公共模数可能会带来一定的威胁。签名及验证协议如下：
1. P产生随机数k，k < q；
2. P计算 r = ( g^k mod p ) mod q
s = ( k^(-1) (H(m) + xr)) mod q
签名结果是( m, r, s )。
3. 验证时计算 w = s^(-1)mod q
u1 = ( H( m ) * w ) mod q
u2 = ( r * w ) mod q
v = (( g^u1 * y^u2 ) mod p ) mod q
若v = r，则认为签名有效。
DSA是基于整数有限域离散对数难题的，其安全性与RSA相比差不多。DSA的一个重要特点是两个素数公开，这样，当使用别人的p和q时，即使不知道私钥，你也能确认它们是否是随机产生的，还是作了手脚。RSA算法却作不到。
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Size: 136192 |
Author: wildkaede |
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Description: 计算冲击电压波下的Q-V图,雷电波或操作冲击波均可-simulation of q-v curv under thounder
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Size: 1024 |
Author: lite |
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Description: 一种快速Kalman滤波算法实现,。对于某些不能够采取离线计算的滤波过程来说，它可以在保证一定精度的同时极大地提高计算速度和减少计算占用资源- EKF Extended Kalman Filter for nonlinear dynamic systems
[x, P] = ekf(f,x,P,h,z,Q,R) returns state estimate, x and state covariance, P
for nonlinear dynamic system:
x_k+1 = f(x_k)+ w_k
z_k = h(x_k)+ v_k
where w ~ N(0,Q) meaning w is gaussian noise with covariance Q
v ~ N(0,R) meaning v is gaussian noise with covariance R
Inputs: f: function handle for f(x)
x: a priori state estimate
P: a priori estimated state covariance
h: fanction handle for h(x)
z: current measurement
Q: process noise covariance
R: measurement noise covariance
Output: x: a posteriori state estimate
P: a posteriori state covariance
Example:
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Size: 3072 |
Author: 柳兵 |
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Description: 微电网下垂控制，在感性线路情况下，实现p/f,q/v下垂控制。能够运行。(Microgrid droop control, in the case of inductive lines, the realization of p/f, q/v droop control. It can run.)
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Size: 46080 |
Author: junqielun
|
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Description: calculates gamma Q V sensitivity for voltage stability
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Size: 2048 |
Author: zenifar |
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Description: A non-int-length property can be fetched by getlongprop(), q.v.
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Size: 2048 |
Author: dglenjou |
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Description: 微电网中的下垂控制方法,采用p/f,Q/V特性(droop control microgrid)
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Size: 23552 |
Author: XYNMXY |
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Description: 下垂控制就是选择与传统发电机相似的频率一次下垂特性曲线（Droop Character）作为微源的控制方式，即分别通过P/f下垂控制和Q/V下垂控制来获取稳定的频率和电压，这种控制方法对微网中的微源输出的有功功率和无功功率分别进行控制，无需机组间的通信协调，实现了微源即插即用和对等控制的目标，保证了孤岛下微电网内电力平衡和频率的统一，具有简单可靠的特点(Droop control is to choose Droop Character, which is similar to the traditional generator, as the control mode of micro-source, that is, to obtain stable frequency and voltage through P/f droop control and Q/V droop control respectively. This control method controls active power and reactive power of micro-source output in micro-grid separately, without communication coordination between units. The goal of micro-source plug-and-play and peer-to-peer control is realized, which ensures the unification of power balance and frequency in the micro-grid under isolated islands, and has the characteristics of simplicity and reliability.)
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Size: 45056 |
Author: drfxxq |
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Description: Communication to Siemens S7-200 with ppi protocol. can read/write I,Q,V zone...
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Size: 439296 |
Author: jiangbo0143 |
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Description: 所谓下垂控制就是选择与传统发电机相似的频率一次下垂特性曲线（Droop Character）作为微源的控制方式，即分别通过P/f下垂控制和Q/V下垂控制来获取稳定的频率和电压，这种控制方法对微网中的微源输出的有功功率和无功功率分别进行控制，无需机组间的通信协调，实现了微源即插即用和对等控制的目标，保证了孤岛下微电网内电力平衡和频率的统一，具有简单可靠的特点。(The so-called droop control is to select the frequency droop characteristic curve similar to the traditional generator Character) as the control mode of micro source, i.e. to obtain stable frequency and voltage through P / F droop control and Q / V droop control respectively, this control method controls the active power and reactive power of micro source output in micro network respectively, without communication coordination between units, realizes the goal of micro source plug and play and peer-to-peer control, and ensures the power level in micro grid under island The unity of balance and frequency is simple and reliable.)
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Size: 22528 |
Author: 不讲究 |
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