magnetometer uses

degrees.Fig. 1 Map of ground magnetic fieldThe geomagnetic field is a vector, and for a fixed location, the vector can be decomposed into two components parallel to the local water level and a vertical component to the local water plane. If the electronic compass is kept parallel to the local water level, the three axes of the magnetometer in the compass correspond to these three components, as shown in 2.Fig. 2 Decomposition of ground magnetic field

Transfer from http://blog.csdn.net/a345017062/article/details/6459643A gyroscope is an internal gyroscope, whose axis is always parallel to the initial direction due to the gyro effect, so that the actual direction can be calculated by deviations from the initial direction. The gyroscope in the cell phone is actually a very sophisticated chip with ultra-tiny tops inside.Accelerometers are used to detect the size and direction of the acceleration that the phone is subjected to, while the mobile p

Men confess to womenMale: Be my girlfriendFemale: Do you have a room?Male: rented ......Female: Is there a car?Male: bicycle ......Female: What is the salary?Male: 20000 ...... every yearFemale: Why are you chasing me?Male: I will hurt you.Female: pain? How many pounds?Male: I love you.Female: Love? Can it be used as a meal?The man looked red and went away ............Three years later...Male: I want to marry you.Female: Do you have a room?Male: I have no house... But I have a villa.Female: car?

Linux (CentOS 7.0) uses the Yum installation configuration and uses SVN.Reprint is marked original address: http://blog.csdn.net/u010587274/article/details/51015291Personal public Number: tanzi_888 (Tam zi technology circle)One installation InstructionsSystem Environment: CentOS-7.0Installation method: Yum Install (source installation is prone to version compatibility issues)Install software: The system aut

PHP uses redis and php uses redis. PHP uses redis, php uses redis? Php * obtain the database name from the platform * $ dbname; * obtain the host, port, user, pwd * $ host from the environment variables; $ port; $ user; $ pwd; try {* set up PHP to use redis, and php to use redis Connect ($ host, $ port); if ($ ret =

After a company recently deployed a project to the production environment, it found that its memory usage only rose and fell, and it was suspected that the memory was leaked.ProgramStable Operation brings great risks. There are two methods to solve Memory leakage: static check and dynamic monitoring. In terms of difficulty in use, dynamic monitoring is far greater than static checks. In order of use, dynamic monitoring is usually conducted first and then. A better tool for static checks is fxc

Stream editor sed uses the summary and uses sed to extract strings from text. The editor sed Sed is an editor, but it is different from most other editors. In addition to not facing the screen, it is still non-interactive, and our commonly used vim editor is interactive. This means that the command to be executed on the data must be inserted into the command line or the script to be processed. Sed is non-in

Jquery uses 12 minor functions and jquery uses 12 functions. Jquery12 common functions are excellent. Come and watch it! Back to TopYou can use the animate and scrollTop methods of JQuery to create an animation that simply returns the top: // Back to top$('a.top').click(function (e) { e.preventDefault(); $(document.body).animate({scrollTop: 0}, 800);}); There is a button in HTML: You can change the value o

Ajax uses code parsing and Ajax uses code parsing. Ajax Introduction Ajax is considered to be (Asynchronous (short for Asynchronous) JavaScript And Xml ). Currently, Ajax is a technology that allows the browser to communicate with the server without refreshing the current page. Synchronization refers to the communication mode in which the sender sends a packet only after the receiver sends a response. Async

Mysql uses custom methods and cakephp uses join queries on pages Step 1: set global log_bin_trust_function_creators = TRUE;If ERROR 1418 (HY000) is reported: This function has none of DETERMINISTIC, no SQL, or reads SQL DATA in its declaration and binary logging is enabled (you * might * want to use the less safe log_bin_trust_function_creators variable)Step 2:SQL code DELIMITER $ USE 'zhiku '$ Drop

Css uses different IDs and classes. css uses idclass In CSS, the class selector is displayed with a dot: .center {text-align: center} In the preceding example, all HTML elements with the center class are centered. In the following HTML code, both h1 and p elements have center classes. This means both of them will comply with the rules in the ". center" selector. class="center">This heading will be center-al

Cygwin uses the telnet package, and cygwin uses telnet I am usually busy with what I have done. Anyone who can find materials on the Internet will copy a copy from other places to my blog as a memo and use it for future queries. You can only write something you cannot find online. In the last six months, cygwin's experience in terms of code reading, screen, ssh, and so on in vim is quite in line with our

");Thread.Sleep (50);}}}}4, there are 1 pieces, 2 pieces, 5 pieces of money, make up 20 dollars, there are several ways tofor (int a = 0; a {for (int b = 0; b {for (int c = 0; c {int d = A + b * 2 + c * 5;if (d = = 20){Console.WriteLine ("Need 1 Yuan" +a+ "Zhang, 2 yuan" +b+ "Zhang, 5 yuan" +c+ "Zhang");}}}}5. A reconnaissance team received an urgent task requiring a number of persons to be selected as many as possible in a, B, C, D, E and F six players, subject to the following restrictions:Sco

JPA (5) uses second-level cache, and jpa uses second-level cache Jpa caches are classified into level-1 caches and level-2 caches. level-1 caches are session-level, while level-2 caches are cross-session-level. The second-level cache is used and Ehcache is used. The first step is to configure the second-level cache in the configuration file. Note:It is a second-level cache. Of course, you need to know what

Spring uses "1" and spring uses "1" The previous article explains how to set up a spring development environment. A brief review is to import the jar package of spring into the project. If the jar package is in the lib directory of the Java Web project, then in the web. configure in the xml file and configure the path of the spring configuration file. In the previous article, I forgot to paste the spring co

Python uses case-insensitive sorting to sort string lists. python uses case-insensitive sorting. This article describes how to sort string lists by case-insensitive python. Share it with you for your reference. The specific analysis is as follows: Let's take a look at the following code: String = ''' the stirngHas manyline InTHE fIlejb51 net''' list _ of_string = string. split () print list_of_string # spli

Background: The laboratory can be less Internet IP and workstations using intranet IP address is not linked to the outside world, usually basically do not surf the internet, but sometimes need to temporarily network Yum install software or wget softwareSolution: HTTP Proxy Internet1. Configure the HTTP proxy server with squid,2.yum using HTTP proxy, modify/etc/yum.confThe last line is added:Proxy=http:// proxy IP: Proxy port3.wget using HTTP proxy, new ~/.WGETRChttp-proxy = Proxy IP: Proxy portY

. Net uses the record about Linq today, And. net uses linq today. I have been in touch with. net since my internship for more than half a year. Today, I have encountered a problem with LINQ in my project. So I searched the internet and found out here to make it easier for me to view 0_0. Language Integrated Query is a set of extensions for c # and Visual Basic languages. It allows you to write C # Or Visu

Android uses the AsyncHttpClient framework to upload files and uses HttpURLConnection to download files. The android-async-http open-source framework of AsyncHttpClient is very convenient. The AsyncHttpClient class is usually used in android applications to create asynchronous GET, POST, PUT, and delete http requests. The request parameters are created through the RequestParams instance, and the response is

, to use the third-party module in the implementation of the proxy, Nginx does not support the MogileFS agent, download module fast for nginx_mogilefs_module,:http:// Www.grid.net.ru/nginx/download/nginx_mogilefs_module-1.0.4.tar.gz* * For detailed parameters, please refer to the official documentation: http://www.grid.net.ru/nginx/mogilefs.en.html**8. Configure two MogileFS hostsWhen two hosts are configured, the MOGILEFSD process reads the information of the Mogstord node in the database, whic