I've been contacted a few days ago to discuss the limit compression algorithm I designed 2 years ago, I hate to be surprised, as a basic class algorithm, there is no profit space, and I designed to publish to the Internet for two years there are people interested in, in the spirit of open source, is now re-tidy up the release, Copyright Declaration, open source is the algorithm, does not mean that can be commercial, personal research no problem, but
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It is very necessary to compress the header of a webpage when the page size is large. This will significantly reduce the page size and increase the speed at which the webpage is downloaded from the server to the client, here is a test I did:
When Header Compression is not used:
After header compression is used:
We can see that the size of the web page is reduced by 6 kb, whic
Inkfish original, do not reprint commercial nature, reproduced please indicate the source (http://blog.csdn.net/inkfish).
The concern here is the BZIP2 format, tested, is always unable to compress correctly, the reason is unknown, and the Apache Commons bzip2 format file compression is normal. (Source: Http://blog.csdn.net/inkfish)
Ant Zip Compression: (Source: Http://blog.csdn.net/inkfish)
Package study.in
When the data requested by a website from the server is large, loading of the browser is slow under limited bandwidth. Sometimes, the page does not respond and the user experience is poor, tomcat provides us with an effective solution, that is, using compression to solve the transmission problem.Tomcat uses HTTP/1.1 gzip for compression to reduce bandwidth pressure,First, we will introduce gzip:Gzip encodin
The following simple to write a picture processing class, features include: watermarks, thumbnails and so on.However, there are two ways to generate thumbnails: one is to compress the pictures directly proportionally, and the other is to cut and then compress the images first. In my opinion, the difference between compression and cropping compression is:and other examples of
PHP image processing function class (watermark image, thumbnail) [about proportional compression and cropping compression]
The following is a simple image processing class, including watermarks and thumbnails.However, there are two ways to generate a thumbnail: one is to compress the image in proportion, and the other is to crop and then compress the image. In my opinion, the difference between
Solid compaction is a special compressed storage format, and solid compaction compresses all files to be compressed as a continuous stream of data to be processed. Popular can think of this: ordinary compression is a file of a file is compressed and then synthesized compressed package, solid compression is the first to connect these files as a large file for compression
Main content:
Algorithmic flow of Samp
Samp's MATLAB implementation
Experiment and result of one-dimensional signal
Experiment and result of probability relationship between sparsity K and reconstruction success
First, the SAMP algorithm flowAs mentioned above, most of the OMP and its pre-modification algorithms need to know the sparsity of the signal k, and in practice this is generally unknown, based on this background, sparse adaptive matching tracking (sparsity Adaptive MP)
file suffix
Unzip Command
Compress Command
. zip (Requires zip)
Unzip File.zip
Zip File.zip DirName
. RAR (Requires RAR)
RAR x File.rar
RAR a File.rar
. Tar (packaged, not compressed)
Tar xvf File.tar
Tar cvf File.tar DirName
. tar.gz,. tgz
Tar zxvf File.tar.gz
Tar zcvf File.tar.gz DirName
. tar.bz2,. tar.bz
Tar jxvf File.tar.bz2
Tar jcvf File.tar.bz2 Dir
Copy CodeThe code is as follows:
/* Creates a compressed zip file */function Create_zip ($files = Array (), $destination = ", $overwrite = False) {If the zip file already exists and overwrite is false, return falseif (file_exists ($destination) ! $overwrite) {return false;}VARs$valid _files = Array ();If files were passed in ...if (Is_array ($files)) {Cycle through each fileforeach ($files as $file) {Make sure the file existsif (file_exists ($file)) {$valid _files[] = $file;}}}If we have good f
Compress images by using applets
In the initial stage, the little program of Brother Xiaolong is equivalent to 6 in the IE field. Here we will tell you a glimpse of the past.
Photo API.
Wx. chooseImage ({count: 1, // default 9 sizeType: ['original', 'compressed '], // you can specify whether the source image or the compressed image is used. Both have sourceType by default: ['alipay', 'camera '], // you can specify whether the source is an album or a camera. Both have success: function (res) by d
Access
The operation is very simple, the specific steps are as follows: Open your MDB database, tools--> Database Utilities--> compression and Repair Database (c) ...
SQL SERVER
In general, the contraction of the SQL database does not greatly reduce the size of the database, its primary role is to shrink the log size, you should do this periodically to avoid the database log too large
1, set the database mode to Simple mode: Open SQL Enterprise Ma
Use of System. Web. Optimization merge compression technology, webpack compression and jsThe principle of bundling and compression is to bind multiple css filesDynamic mergeAndCompressionIs a css file and multiple js files.Dynamic mergeAndCompressionIs a js file, so as to reduce the number of browser requests to server resource files, reduce the size of resource
One module recommended by myself can also compress all resources requested by the aspx page and compression modules that support powerful custom functions, like HttpCompress6.0, you can customize the types of resources you want to compress and do not compress those types of resources. You can also define whether to compress the specified page or not to compress the specified page, in addition, the Cache Resource function and the powerful function of t
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