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Orientation of a given circle

∞ Orientation of a given circle Using Z2, Z3 and Z4, we can determine a unique circle passing loss SS these three points. We denote this circle by C. If Z is on the circle, then we haveIm (z, Z2, Z3, Z4) = 0. C automatically separate the complex plane into two parts. One part contains all Z whereIm (z, Z2, Z3, Z4) . We call this partAlgebraic left-h

Mysqlbinlog parsing binlog garbled issue decryption

| FULL || binlog_rows_query_log_events | OFF || binlog_stmt_cache_size | 32768 || innodb_api_enable_binlog | OFF || innodb_locks_unsafe_for_binlog | OFF || max_binlog_cache_size | 18446744073709547520 || max_binlog_size | 1073741824 || max_binlog_stmt_cache_size | 184467440737

Mysqlbinlog parsing binlog garbled issue decryption

z4 select 1 as a;Query OK, 1 row affected (0.02 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> insert into z4 select 2;Query OK, 1 row affected (0.00 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> The blog is owned by the csdn blogger Huang Shan (mchdba). The original address is http://blog.csdn.net/mchdba/article/details/50300035. 3. view the binlog. the binlog mode is garbled and the executed SQL sta

20 smart Watch UI design cases worth learning

While many of the cases are the conceptual design of the Apple Watch, there are some bright spots on the UI that can be used to catalyze creativity and to learn from it. Spotify pulse–apple Watch UI Instagram Android Wear Concept UI Cyclus™–smartwatch concept Iwatch Concept Smart Watch IOS 7 Facebook Android Wear Concept UI Apple Watch Premier League matchday App Iwatch Concept Concept

Returns the shortest distance of two line segments in a space (written in OSG + C ++)

The shortest distance of two line segments Float distancelinetoline (const OSG: vec3d P1, const OSG: vec3d p2, const OSG: vec3d P3, const OSG: vec3d P4) {float distance; float X1 = p1.x (); // a coordinate (x1, Y1, Z1) float Y1 = p1.y (); float z1 = p1.z (); float X2 = p2.x (); // coordinate of point B (X2, Y2, Z2) float y2 = p2.y (); float Z2 = p2.z (); float X3 = p3.x (); // coordinate of point C (X3, y3, Z3) float Y3 = p3.y (); float Z3 = p3.z (); float X4 = p4.x (); // D coordinate (X4,

__python of Chinese word frequency analysis based on Python

') , ' W ') r = Re.compile (' [\x80-\xff]+ ') m = r.findall (TXT) dict={} z1 = Re.compile (' [\x80-\xff]{2} ') z2 = Re.compile (' [\x80-\xff]{4} ') z3 = re.compile (' [\x80-\xff]{6} ') z4 = Re.compile (' [\x80-\xff]{8} ' For I in M: x = I.encode (' gb18030 ') i = Z1.findall (x) #i + = Z2.findall (x) #i + = Z2.findall (x[2 :] #i + + z3.findall (x) #i + + + z3.findall (x[2:]) #i + + = Z3.findall (x[4:]) #i + =

3D draw a cylindrical

(circle_degree-degreespan )));Float X4 = (float) (J + 1) * collength-length/2 );Float Y4 = (float) (circle_radius * Math. Sin (math. toradians (circle_degree )));Float Z4 = (float) (circle_radius * Math. Cos (math. toradians (circle_degree )));Val. Add (X1); Val. Add (Y1); Val. Add (Z1); // two vertices of each line are determined. There are 6 lines and 12 vertices in total.Val. Add (X2); Val. Add (Y2); Val. Add (Z2 );Val. Add (X2); Val. Add (Y2); Va

ERROR 1062 (23000): Duplicate entry ' 0 ' for key ' PRIMARY '

Os:centos 6.3db:5.5.14Test Create Yoon Test table, no primary key, no index, the underlying data content is as follows:Mysql> select * from Yoon;+----+----------+------+| ID | name | user |+----+----------+------+| 1 | \ "" ##!aa | NULL || 2 | Z2 | NULL || 3 | Z3 | NULL || 4 | Z4 | NULL || 5 | Z5 | NULL |+----+----------+------+5 rows in Set (0.00 sec)The Test uses a command to set the ID to the self-increment primary key, the command ALTER TABLE YO

ENGADGET2014 's worst digital product of the year, made from the

1. Samsung Gear SWithout a doubt the year of the smartwatch, buoyed by the release of Android Wear and a slew of devices built to Run it. The Gear S isn ' t one of those products; It ' s instead based on Tizen. From there, it further sets itself apart from the other Samsung Gear devices in the It can be used as a full-fledged phone. But would, want to? Sure, it ' s comfortable, but it's also super chunky-like wearing a shrunken-down Galaxy S5 on your

JS play a Play

();}function Zong10 () {ZZ = "Record Search";Dadajuan ();}function Zong11 () {ZZ = "Game";Dadajuan ();}function Zong12 () {ZZ = "recent video";Dadajuan ();}var i = 0;var Shuzu = new Array ();var x = 0;function Dadajuan () {if (iShuzu[i] = ZZ;var Kaiguan = 1;if (i!=0) {for (var j = 0;jvar Cao = shuzu[j];if (Cao = = zz) {Kaiguan = 2;x = j;}}}if (Kaiguan = = 1) {Bianse ();switch (i) {Case 0:$ ("#z0"). HTML (ZZ);$ ("#z0"). CSS ({"Border-bottom": "Sandybrown Solid 2px"});BreakCase 1:$ ("#z1"). HTML

Analysis of MySQL Partition Table Technology

partitions, this problem is automatically handled through the hash function used inside the MySQL server. Note: partition names are case-insensitive. For RANGE partitions and LIST partitions, the partition names cannot be repeated. These types can be selected based on different requirements. The commonly used RANGE partition is used.Common MySQL partition management:RANGE and LIST partition managementPartitions are transparent to programs, and only deletion can be performed at the partition lev

MySQL partition table technical analysis _ MySQL

function must return an integer greater than 0. For KEY partitions, this problem is automatically handled through the hash function used inside the MySQL server. Note: partition names are case-insensitive. for RANGE partitions and LIST partitions, the partition names cannot be repeated. These types can be selected based on different requirements. the commonly used RANGE partition is used. Common MySQL partition management:RANGE and LIST partition managementPartitions are transparent to programs

[Database] sqlite3 usage Summary 1)

://www.sqlite.org/website. When I write this article, the latest code is 3.3.17. % K $} V G (d # M: U0 s4 A0 h g $ Z: U: '0 ~ K: V * gI haven't downloaded the new SQLite code for a long time, so I don't know that SQLite has changed so much. In the past, many files are merged into a sqlite3.c file. It would be nice to use this file separately, saving you the trouble of copying a bunch of files and worrying about any omissions. But it also brings about a problem: the file is too large, and it is

Android OpenGL ES

. Cos (math. toradians (angle-sectorangle ))); // Vertex coordinates in the lower left cornerFloat X4 = x1;Float Y4 = Y3;Float Z4 = Z3; // The first lineArraylist. Add (X1 );Arraylist. Add (Y1 );Arraylist. Add (Z1 ); Arraylist. Add (X2 );Arraylist. Add (Y2 );Arraylist. Add (Z2 ); // Second lineArraylist. Add (X2 );Arraylist. Add (Y2 );Arraylist. Add (Z2 ); Arraylist. Add (X4 );Arraylist. Add (Y4 );Arraylist. Add (

Chess AI Algorithm (two)

', ' S0 ', ' J0 ', ' S1 ', ' X1 ', ' M1 ', ' C1 '],[,,,,,,,, ],[ , ' P0 ',,,,,,, ' P1 ', ],[' Z0 ', , ' Z1 ', , ' Z2 ', , ' Z3 ' ,, ' Z4 '],[,,,,,,,, ],[ , ,,, ,,, , ],[' z0 ', , ' Z1 ', , ' Z2 ', , ' Z3 ', , ' Z4 '],[ , ' P0 ', , ,,,, ' P1 ',],[,,,,,,, , ],[' C0 ', ' M0 ', ' x0 ', ' s0 ', ' j0 ', ' s1 ', ' X1 ', ' M1 ', ' C1 '];The string h

Returns the volume of a given triangle.

We know that the coordinates of the triangle vertices are (x1, y1, z1), (x2, y2, z2), (x3, y3, z3), (x4, y4, z4 ), you can use either of the following two methods to calculate the volume of a single triangle: 1. Use the hybrid product of Vectors Set the three-way amount passing through a vertexA,B,CWhich of the following is the volume of the expected triangle? | (A×B)·C|/6. Assume that (x1, y1, z1) is a four-dimensional vertex A = (x2-x1, y2-y1, z2-z1

Summary and learning of some swift code

/account.ring.gz.......Then, rebalance the ring file:Swift-ring-builder account. Builder create 18 3 1Swift-ring-builder account. Builder add z1-192.168.1.50: 6002/SDC 100Swift-ring-builder account. Builder add z2-192.168.1.51: 6002/SDC 100Swift-ring-builder account. Builder add z3-192.168.1.52: 6002/SDC 100Swift-ring-builder account. Builder add z4-192.168.1.54: 6002/SDC 100Swift-ring-builder account. Builder add z5-192.168.1.53: 6002/SDC 100Swift-ri

Hibernate learning 5-hibernate Action Object 2

also updated; 5. Can not do: Which field changed to update, which field has not changed, which field is not updated? What to do:a.xml configuration: classname= "Com.cy.Teacher" dynamic-update= "true" >.....class>B. Issues with cross-session updates:@Test public void TestUpdate5 () {Session session = Sessionfactory.getcurrentsession (); Session.begintransaction (); Student s = (Student) session.get (Student.class, 1); S.setname ("Zhangsan5"); Session.gettransa

"Lighthouse" for beginners in programming

good Python program feels like reading English. It allows you to focus on solving problems rather than figuring out the language itself. JavaScript is one of the most useful languages JavaScript is not as simple as python, but it can run on every platform: Mac, Windows, iOS, Android, and more. Every single web browser, even a new device like smartwatch, uses JavaScript on some features. after JavaScript, try Ruby and Ruby on Rails Ruby on Rails is a

. Net micro framework SDK 2.5 released

Yesterday, Microsoft released. Net micro framework SDK 2.5. Many may not know the micro framework very well. This version is called micro because it will run on a smaller mobile device and can run on a version without MMU of ARM7. The first version was released on July 13. Netmf is smaller than Windows CE and can run completely out of the operating system environment. This is very suitable for embedded systems .. Net micro framework has been applied to Microsoft's

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