Zip

说明：  从Zip文件创建，添加，提取，更新，删除文件 读/写密码保护的Zip文件 支持AES 128/256加密 支持标准邮??编加密 支持Zip64格式 支持存储（无压缩）和Deflate压缩方法 从Split Zip文件创建或提取文件（例如：z01，z02，... zip） 支持Unicode文件名 进度监视器(Create, add, extract, update, delete files from Zip files Read/write password-protected Zip files Support for AES 128/256 encryption Supporting Standard Postal Encryption Support Zip64 format Supporting storage (uncompressed) and Deflate compression methods Create or extract files from Split Zip files (e.g. z01, z02,... Zip))

霍夫曼编解码matlab程序，包含熵的计算。(Hoffman codec Matlab procedures, including the calculation of entropy.)

Codes". Huffman coding uses a specific method for choosing the representation for each symbol, resulting in a prefix code (sometimes called "prefix-free codes") (that is, the bit string representing some particular symbol is never a prefix of the bit string representing any other symbol) that expresses the most common characters using shorter strings of bits than are used for less common source symbols. Huffman was able to design the most efficient compression method of this type: no other mapping of individual source symbols to unique strings of bits will produce a smaller average output size when the actual symbol frequencies agree with those used to create the code. A method was later found to do this in linear time if input probabilities (also known as weights) are sorted.

说明：  thank you for every thing

bmp转换为jpeg,jpeg压缩的源代码 程序用vc实现了bmp图片转换成jpeg图片(converted to jpeg bmp, jpeg compression source code procedures used vc realized bmp images converted into jpeg photos)

基于小波变换的图像压缩，使用EZW算法。(Image compression based on wavelet transform, using EZW algorithm.)

说明：  基于FFT和DWT变换的压缩感知，比较不同稀疏基下CS重构算法的性能(CS based on FFT and DWT)

采用LBM+LES方法编制 了计算程序.首先计算了湍流平板附面层解,用来校对程序的正确性,结果表明计算值和理论值符合得很好.然后计算了亚音可压缩的湍流后台阶流以及超音湍流的 后台阶流.(LBM+LES simulation of flow)

matlab实现的huff图像压缩程序 可成功运行((matlab implementation of huff image compression program which can be run successfully))

香农编码的C++实现。原理说明以及源代码。(The Shannon coding C++. Principle of instructions and source code.)