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,U] = lu(X)② [L,U,P] = lu(X) Where, the return matrix U is the upper triangle array, and the matrix L is the lower triangle array or its transformation form, and meets Lu = x. Returns the row transformation matrix of the matrix P, which is Lu = px. (Example 3.24) Lu decomposition of matrix XIn the command window, enter the following content to create the matrix X:gt;gt; X=[5 3 4 8 5;6 8 7 6 9;2 6 8 2 1;2 7 9 3 9;4 5 6 7 8];① Perform Lu decompositio

47. Innovation workshop (algorithm ):Returns the longest descending subsequence of an array, for example, {9, 4, 3, 2, 5, 3, 2,4,3, 2} Idea: Dynamic Planning Calculates the longest descending subsequence of the sequence of the current number. Each time you look for the longest child sequence, scan the child sequence obtained before it, and the first number is smaller than the current number. For example, the first digit is 2, the maximum length is 1,

Online mall 4 -- query of the second-level category on the homepage; 4 -- second-level category 1. Create a table Create table 'categorysecond' ('csid' int (11) not null AUTO_INCREMENT, 'csname' varchar (255) default null, 'cid' int (11) default null, primary key ('csid '), KEY 'fk936fcaf21db1fd15' ('cid'), CONSTRAINT 'fk936fcaf21db1fd15 'foreign key ('cid') REFERENCES 'category' ('cid ')) ENGINE = InnoDB

IOS-C day 4 (upper) and ios-c day 4 1. Use of the while loop structure; 2. Random Number acquisition; 3. Use of do... while loop body; 4. Use of the for loop structure; 5. What is the difference between break and continue; 1. Use of the while loop structure // While Structure// While (conditional expression ){// Loop body;//}// Execution sequence: determines whe

Analysis of TCP/IP layer-4 protocol system and tcpip layer-4 Protocol TCP/IP layer-4 protocol system 1) The link layer, also known as the data link layer or network interface layer, usually includes the device driver in the operating system and the network interface card corresponding to the computer. They work together with the physical interface details of the

Chapter 4 scrapy crawls well-known Q A websites and Chapter 4 scrapy Crawlers In chapter 5, it seems that the practice project in Chapter 4 is nothing more than a simulated logon. The records are recorded in different sections and the knowledge points are directly added, which may be messy. 1. Common httpcode: 2. How to find the post parameter? First, find the

Open 4 threads to execute the following programs within 4 seconds; part of the code has been marked cannot be modified1 Public classLogtest {2 //the method inside can't move.3 Public Static voidParselog (String log) {4SYSTEM.OUT.PRINTLN (log + ":" + (System.currenttimemillis ()/1000));5 Try {6Thread.Sleep (1000);7}Catch(Exception e) {8 e.printstacktrace ();9 }Ten } One A

Document directory Example Iv. comprehensive example bringing it all together Ext js 4 countdown: Dynamic Loading and new class mechanism count down to ext JS 4: Dynamic Loading and New Class System (Lower) January 19,201 1 by EdText Translation ext (ajaxjs.com) Frank Http://www.sencha.com/blog/2011/01/19/countdown-to-ext-js-4-dynamic-loading-and-new-class

Assembly Language Programming by Richard BLUM: 5.2.4 transfer data between memory and registers Memory location with address change: You can specify to store multiple values in the memory in one command: Values: . Int 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 This creates a series of continuous data values stored in the memory. Each data value occupies a unit of memory (in the above example, it is a long integer, that is, 4 bytes ). When

Package com; public class test {public static void main (string [] ARGs) {system. out. println (getsteps1 (); system. out. println (">>>>>>>>>>>>>>>>>>>>>>>>>>>>"); system. out. println (test. getsteps (); system. out. println (">>>>>>>>>>>>>>>>>>>>>>>>>>>> ");} public static int getsteps () {// use the minimum public multiple to reduce the number of traversal times. Int I = 1; int step = 2; Boolean maxstep = false; while (true) {system. Out. Print ("" + I + "); If (! Maxstep) {if (I % 2 = 1) {s

See http://www.k-zone.cn/zblog/post/actionscript-asdoc-1.html for details After flash Builder 4 was released, it not only brought us a brand new Flex SDK 4 (gumbo), but also brought us an "upgraded version" of asdoc, how to configure and use asdoc in Flash Builder 4? In fact, the configuration of asdoc in Flash Builder 4