Vector Delete

First, eigenvalue decomposition 1, matrix multiplication before introducing the geometrical meaning of eigenvalue and eigenvector, the geometric meaning of matrix multiplication is introduced. Matrix multiplication corresponds to a transformation, a new vector that transforms any vector into another direction or length. In this process, the original vector mainly occurs in rotation and expansion of the change. If the matrix only has a scaling transformation for some vectors and does not produce a rotational effect, then these vectors are called the eigenvector of the matrix, and the scale of the scaling is the characteristic value. For example:, its corresponding linear transformation is the following form: Because the matrix M is symmetrical ...

Absrtact: Relevant statistics show that: the number of Web pages approximately duplicated on the Internet accounts for as much as 29% of the total number of pages, and the identical pages account for about 22% of the total number of pages. Research shows that in a large information acquisition system, 30% of the Web pages are and other Relevant statistical data indicate that: the number of pages that are approximately duplicated on the Internet accounts for as much as 29% of the total number of pages, and the exact same Web page accounts for about 22% of the total number of pages. Research shows that in a large information acquisition system, 30% of the pages are completely duplicated or approximately duplicated with another 70% of the pages. ...

Usually the development of the thread is a thing, such as Tomcat is a servlet in the threads, there is no thread how do we provide multi-user access? But many developers who have just started to touch threads have suffered a lot. 　　How to do a set of simple threading Development Mode framework for everyone from the single thread development into multithreaded development, this is really a relatively difficult project. What is the specific thread? First look at what the process is, the process is a system executed a program, this program can use memory, processor, file system and other related resources ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall Synthesis (composite) mode is a very important design pattern, The compositing pattern organizes objects into trees to describe the relationship of the tree. First, the schematic diagram is visible from the schematic diagram, File, the folder all can treat the reed ifile Equally, provides the great convenience for the object management. Of course...

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall with the popularization of the network, E-commerce more and more extensive to the modern daily life, people want to get all kinds of information on the Internet. A new, dynamic, beautiful Web page content can effectively enhance corporate image and highlight product features. Although the use of a variety of languages to build a Web site, can make the site functional integrity, but the site interface effect can not be achieved perfectly. 　　Flash is a web design tool that can achieve complete function, beautiful interface and full dynamic effect. With the traditional ...

In website optimization, if the picture is optimized well, not only can improve the loading speed of the page, improve the user experience of the website, but also can save the bandwidth of the website through image optimization. So as a page construction engineer should adopt what method to optimize the picture, both to ensure the restoration of UI, but also make the picture the most streamlined? Here I personal experience, to briefly introduce the method of image optimization, first of all, we know some pictures of knowledge: 1. & http: //www.aliyun.com/zixun/aggregation/37954 ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall One, the space buys with the domain name registration when you begin to build the station formally, the first thing you have to prepare is to have a space, and to have a domain name, space is like your house, and the domain name is like a number, when you invite friends and relatives to your home, you must first tell him your 　　The house number, he can according to you provide the information correctly arrives at your home guest. Domain name application: Domain name application preferred suffix is the best COM domain name, whether from the SEO angle or net ...

PageRank algorithm PageRank algorithm is Google once Shong "leaning against the Sky Sword", The algorithm by Larry Page and http://www.aliyun.com/zixun/aggregation/16959.html "> Sergey Brin invented at Stanford University, the paper download: The PageRank citation ranking:bringing order to the ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology lobby site of the reverse chain in a certain angle, directly affect the weight of the site, snapshots, rankings, included, Especially small and medium websites. In fact, we are in the process of construction in the chain, it is inevitable to encounter reverse link reduction occurs, and sometimes the number of the chain would like to be an hourglass, a few days off some, and sometimes the number of outside the chain is like encountering ...

Absrtact: For the first time knowing that Mapbox was at last year's Mobile-loco conference, CEO Eric Gundersen showed me how to customize a digital map based on the cloud with Mapbox, what impressed me most was not customization, but its design, Including the website itself UI and given the first time to know Mapbox was at last year's Mobile-loco conference, CEO Eric Gundersen showed me how to customize a cloud based digital map with Mapbox ...