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。
上传时间： 2014-11-23
上传用户：shanml
希尔排序算法: 基本思想：将整个无序序列分割成若干小的子序列分别进行插入排序。 序列分割方法：将相隔某个增量h的元素构成一个子序列。在排序过程中，逐次减小这个增量，最后当h减到1时，进行一次插入排序，排序就完成。增量序列一般采用：ht=2t-1,1≤t≤[log2n]，其中n为待排序序列的长度。
上传时间： 2013-12-19
上传用户：kikye
This a simple database management system. It doesn t use any other code (i.e. ODBC, ADO, etc.) and has it s own database file format. I wrote it because I found the other DBMSs code too bulky and hard to debug. It s designed for small applications and I doubt it could handle anything on a large scale. A sample program included in the .zip shows how everything works. The database project is a library project, so you ll have to compile and link with the .lib file to get everything working. Pros: - You have the source code so you know exactly what it is doing - Database files are very small - Small and fast code Cons: - Can t handle large amounts of records (more than 65000ish) - Doesn t support SQL (you have to search the database by cycling through the records and testing them against your constraints) - Each database file can only have one table.
标签： i.e. management database simple
上传时间： 2016-10-02
上传用户：851197153
H.248协议，也叫MeGaCo协议，是媒体网关控制器（MGC）与媒体网关（MG）之间的一种媒体网关控制协议，这个协议是一项ITU-T与IETF合作结果的新标准。目前ITU-T、IETF、软交换论坛等标准化组织正在加紧对H.248协议进行完善，各大电信设备制造商也在H.248协议的研发和应用上加大了投入。与MGCP协议相比，H.248协议可以支持更多类型的接入技术并支持终端的移动性，除此之外，H.248协议最显著之处在于能够支持更大规模的网络应用，而且更便于对协议进行扩充，因而灵活性更强，已逐渐取代MGCP发展成为媒体网关控制协议的标准
上传时间： 2016-12-17
上传用户：笨小孩
H.264/AVC, the result of the collaboration between the ISO/IEC Moving Picture Experts Group and the ITU-T Video Coding Experts Group, is the latest standard for video coding. The goals of this standardization effort were enhanced compression efficiency, network friendly video representation for interactive (video telephony) and non-interactive applications (broadcast, streaming, storage, video on demand). H.264/AVC provides gains in compression efficiency of up to 50％ over a wide range of bit rates and video resolutions compared to previous standards. Compared to previous standards, the decoder complexity is about four times that of MPEG-2 and two times that of MPEG-4 Visual Simple Profile. This paper provides an overview of the new tools, features and complexity of H.264/AVC.
标签： the collaboration between Experts
上传时间： 2013-12-30
上传用户：dongbaobao
A novel met hod t o p artially compensate sigma2delta shap ed noise is p rop osed. By injecting t he comp en2 sation cur rent int o t he p assive loop f ilte r during t he delay time of t he p hase f requency detect or ( PFD) , a maximum reduction of t he p hase noise by about 16dB can be achieved. Comp a red t o ot he r compensation met hods , t he tech2 nique p rop osed he re is relatively simple and easy t o implement . Key building blocks f or realizing t he noise cancel2 lation , including t he delay va riable PFD and comp ensation cur rent source , a re sp ecially designed. Bot h t he behavior level and circuit level simulation results a re p resented.
标签： sigma2delta compensate injecting artially
上传时间： 2013-12-18
上传用户：qlpqlq
#include "iostream.h" #include "iomanip.h" #define N 20 //学习样本个数 #define IN 1 //输入层神经元数目 #define HN 8 //隐层神经元数目 #define ON 1 //输出层神经元数目 double P[IN] //单个样本输入数据 double T[ON] //单个样本教师数据 double W[HN][IN] //输入层至隐层权值 double V[ON][HN] //隐层至输出层权值 double X[HN] //隐层的输入 double Y[ON] //输出层的输入 double H[HN] //隐层的输出
标签： define include iostream iomanip
上传时间： 2014-01-01
上传用户：凌云御清风
BP神经网络程序,C语言源代码 如下： #include "iostream.h" #include "iomanip.h" #include "stdlib.h" #include "math.h" #include "stdio.h" #include "time.h" #include "fstream.h" #define N 120 //学习样本个数 #define IN 3 //输入层神经元数目 #define HN 2 //隐层神经元数目 #define ON 2 //输出层神经元数目 #define Z 20000 //旧权值保存-》每次study的权值都保存下来 double P[IN] //单个样本输入数据 double T[ON] //单个样本教师数据 double U11[IN][HN] //输入层至第一隐层权值 double V[HN][ON] //隐层至输出层权值 double X1[HN] //第一隐层的输入 double Y[ON] //输出层的输入 double H1[HN] //第一隐层的输出 double O[ON] //输出层的输出 double YU_HN1[HN] //第一隐层的阈值 double YU_ON[ON] //输出层的阈值 double err_m[N] //第m个样本的总误差 double a //学习效率 double alpha //动量因子
标签： include iostream iomanip stdlib
上传时间： 2017-06-15
上传用户：xinzhch
M i c r o s o f t公司编译了一个所有可能的错误代码的列表，并且为每个错误代码分配了一个3 2 位的号码。Wi n E r r o r. h 头文件包含了M i c r o s o f t 公司定义的错误代码的列 表。
上传时间： 2013-12-08
上传用户：凌云御清风
5、顺序栈 SeqStack.h Test.cpp 6、链式栈 StackNode.h LinkStack.h Test.cpp 7、顺序队列 SeqQueue.h Test.cpp 8、链式队列 QueueNode.h LinkQueue.h Test.cpp
标签： Test LinkStack StackNode cpp
上传时间： 2013-12-20
上传用户：1051290259
