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Reprinted from: http://www.cnblogs.com/skywang12345/p/3691463.htmlBasic concepts of Ⅰ graphs1. Definition of diagramDefinition: Graph (graph) is composed of some points (vertex) and the connection (edge) between these points, where the point is usually the "vertex (vertex)", and the connection between the point and point becomes "Edge or arc" (Edege). It is usually written as g= (V,e).2. Types of graphsDepending on whether the edge has a direction, the graph can be divided into: no map and direc

Test Instructions: n Individuals, everyone has a attribute and B attribute, if a person's A or b is greater than another person, we say this person can beat that person. And this relationship can be passed. For everyone, output how many people he can beat. (Ensure that each a is different and that each B is different.)idea: for a relationship, we press the weight small to Dalian side, b same. Then the point at which each point can be reached is the point that can be defeated. That is, after the

Java Chinese garbled special character solutionI believe many friends have encountered the Java garbled problem, recently I also solve a "use text to generate pictures in the process of Chinese and special characters garbled" problem; it took me a lot of time to debug the Sun.font, SUN.AWT below the various source code, finally understand its mechanism, solve the current problem; now write down the problem solving process and make a record so that you don't meet again later.Problems encountered

The employee's salary is to be adjusted this month, and the manager demands a salary increase according to each person's title. Specific requirements: The primary title for the beginning of this month plus 20 Yuan, the title for the middle of this month plus 50 yuan, the title of the senior 70 yuan this month. But because the company has too many people, adding one by one is not only troublesome but also error prone. After some groping, I found two ways to efficiently solve the problem of Excek

Login registration will have a picture verification, which is to prevent brute force and malicious registration. Write a train of thought to achieve the implementation of the verification picture, just a train of thought, randomly generated text and did not write.ImportJava.awt.Color;ImportJava.awt.Graphics2D;ImportJava.awt.image.BufferedImage;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException;ImportJavax.imageio.ImageIO; Public classImage { Public Stati

[keywords]:java,design pattern, design pattern, Java and Schema learning, composite, synthetic mode [Environment]:staruml5.0 + JDK6 [Author]:winty (wintys@gmail.com) http://www.blogjava.net/wintys/ [Body]: Transparent synthesis mode Package pattern.composite.transparent; Import java.util.*; /** * Transparent synthesis mode: Composite pattern * @version 2009-6-3 * @author winty (wintys@gmail.com)/public class Transparentcompo 　　 　　　 　sitetest{public static void Main (string[] args) {Graph

can be merged into existing code as painless as possible.Rather than fulfilling the characteristics you may need, you only need to achieve the characteristics that you clearly require, and moderate the tolerance for change. If you don't have this kind of flexible, parallel development, that's simply not possible.Programming for Inteface is the core of a flexible structure. To illustrate why, let's take a look at what happens when you use them. Consider the following code:F (){LinkedList list =

Signal Volume: M1: Collection of flowers between mutual exclusion women behavior: 1 M2: collecting and sending flowers between mutually exclusive men: 1 S1: there are flowers. 0 S2: There are tables. 0 Ladies and gentlemen P (S1) p (m2) P (m1) Send flowers Flower V (S1) Send table P (s2) V (S2) Watch V (M1) v (m2) Love Love (2) own answer Four are dick (male), John (male), Xi Hee (female), haha (female) Signal Volume: G1: Do you have a watch: 0 G2

2.0.50727) "); Conn.connect (); BufferedImage bufimg = Imageio.read (Conn.getinputstream ()); Conn.disconnect (); return bufimg; catch (Malformedurlexception e) {e.printstacktrace (); catch (Protocolexception e) {e.printstacktrace (); catch (IOException e) {e.printstacktrace (); return null; /** * Incoming images must be square to be rounded if the proportions of the rectangles will become oval * * @param URL * User Avatar Address * @return * @throws ioexcept Ion */public stat

Copy Code code as follows: Package com.clock; Import Java.awt.BasicStroke;Import Java.awt.Color;Import Java.awt.Font;Import Java.awt.Graphics;Import Java.awt.Graphics2D;Import Java.awt.Insets;Import java.awt.event.ActionEvent;Import Java.awt.event.ActionListener;Import Java.awt.event.WindowAdapter;Import java.awt.event.WindowEvent;Import Java.util.Calendar;Import Java.util.GregorianCalendar; Import javax.swing.*; Import Javax.swing.JFrame; public class Clock extends JFrame impleme

, 0); int x_ctrbox = width-ctrboxwidth-5; int y_ctrbox = 0; Pen Pen (Color (255,128,128,128), 1); G->drawrectangle (pen, X_ctrbox, Y_ctrbox, Ctrboxwidth, ctrboxheight); Minimize the button//pen. SetWidth (2); G->drawline (pen, X_ctrbox + 3, Y_ctrbox + CTRBOXHEIGHT/2,//X_ctrbox + CTRBOXWIDTH/3-3, Y_ctrbox + CTRBOXHEIGHT/2); Maximize button//G->drawline (pen,//X_ctrbox + Ctrboxwidth + 3,//Y_ctrbox + 5,//Ctrboxwid TH/3-6,//CTRBOXWIDTH/3-6); Close button//G->drawline (pen,//X_

) -hostname = Column (String (unique=true), nullable=False) +IP_ADDR = Column (String (+), Unique=true, nullable=False) -Port = Column (Integer, default=22) +group_id = Column (Integer, ForeignKey ('group.id')) A #Backref The name of the object used when associating host with the group atGroup = relationship ('Group', backref='host_list') - - classGroup (Base): - __tablename__='Group' -id = Column (Integer, primary_key=True) -Name = Column (String (), Unique=true, nullable=False) in

int gx,gy; The temp varialbe int g1,g2,g3,g4; Double weight; Double DTEMP,DTEMP1,DTEMP2; Set the edge of the image for the Impossible demarcation Point for (x=0;xIn the above code, there are several if-else to be aware of. In the canny operator's paper proposed by John Canny, the non-maximum suppression is performed in 0, 90, 45, 1354 gradient directions, and each pixel gradient direction is replaced by this four direction in terms of simi

user name, by using rollback in a trigger, the user name cannot be changed. Use Database NameGoCreate trigger trOn Table NameFor updateAsIf Update (username)Rollback tranThe key lies in the last two sentences. The explanation is: if the username column is updated, the transaction will be rolled back. Statements that cannot be used in triggers Most T-SQLStatement, but the following statements cannot be used in the trigger.Create statement, such as create database, create table, and create index

For the DP, such as f [I], which is determined by a number of earlier f [J], the optimization involves monotonic queuing, line segment tree, quadrilateral inequality, and slope optimization.A monotonic queue is generally an accumulation relationship. You can calculate the following DP values in advance to make a decision. The quadrilateral inequality is mostly used for the section K to J Where the I target prevails. Slope optimization can be used for multiplication and division relationships. Wh

Import java. Applet .*; Import java. AWT .*; Import java. AWT. event .*; Import java. AWT. Geom .*; Import javax. Swing .*; Class drawpanel extends jpanel ...{ Public void paint (Graphics g) ... {Graphics2d g2 = (graphics2d) g; Line2d. Double line1 = new line2d. Double (20.0, 20.0, 80.0, 40.0 ); Quadcurve2d. Double line2 = new quadcurve2d. Double (130.0, 30.0, 150.0, 50.0, 170.0, 20.0 ); Cubiccurve2d. Double line3 = new cubiccurve2d. Double (220.0, 40

\ tA2 \ tA3 \ n"; $ str. = "B1 \ tB2 \ b2\ n". you can write these tokens to the file and change the suffix to .xls. excel can read them directly .. But it is not actually a real xls file. $query = sqlsrv_query($conn,$sql);if( $query === false) { die( print_r( sqlsrv_errors(), true) );}while($row = sqlsrv_fetch_array($query)) { echo$objPHPExcel->getActiveSheet()->setCellValue('A2', convertUTF8($row[0]))->setCellValue('B2', convertUTF8($row[1]))->setCellValue('C2', convertUTF8($row[2]))-

();} Public void DrawClock (){Try{ClockPanel. setTime (Integer. parseInt (hour_text.getText (), Integer. ParseInt (minute_text.getText ()));ClockPanel. repaint ();} Catch (NumberFormatException e ){//}} Public JTextField hour_text;Public JTextField minute_text;Private DrawPanel1 clockPanel; Public class clockFieldListener implements DocumentListener{Public void insertUpdate (DocumentEvent event ){DrawClock ();} Public void changedUpdate (DocumentEvent event ){ } Public void removeUpdate (deleen

pages to be printed based on the format of up to 54 lines per page. When the button for printing text is clicked, execute the corresponding print action. You can use the drawString method of Graphics2D to print text.1) Implement the Printable Interface /* Graphic indicates the Graphic environment for printing. PageFormat indicates the format of the printed page (the page size is measured by points, 1 inch of 1 point, 1/72 is 1 inch. A4 paper is roughly 595 × 842 points); page indicate

1];W2=[0-1;1 0];G1=imfilter (I,W1, ' Corr ', ' replicate ');G2=imfilter (I,W1, ' Corr ', ' replicate ');G=abs (G1) +abs (G2);Figure,imshow (g,[]);Figure,imshow (ABS (G1), []);Figure,imshow (ABS (G2), []);(Do not understand how this code is written, do not understand what the function of this operator, from the image can not see the effect) Sobel Gradien