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Use the basic at command of the modem

not use the at prefix or carriage return. Enter this command to make the modem repeat the last command, which is most useful for the phone number that repeatedly calls the busy line. FN: default factory value. If the modem has a default factory value, this command (where n = 0 or 1) returns all parameters to the selected set with the default factory value, but not all modems. H: Hang up. This command notifies the modem to "wait" or disconnect the telephone line. O: online. This command r

Detailed display information of Huawei display interface

, 0 parity errors[20] output (total): 1630514 packets, 525467915 bytes774493 broadcasts, 822714 multicasts, 0 pauses[21] output (normal): 1630514 packets, 525467915 bytes774493 broadcasts, 822714 multicasts, 0 pauses[22] output (error): 0 output errors, 0 underruns, 0 buffer failures, 0 aborts,0 deferred, 0 collisions, 0 late collisions, 0 lost carrier, 0 no carrier Note: Enter :-That is, if the product do

80211 (B/A/N/AC) Rate Introduction

frequency code "01001000111" instead of 1, the frequency code itself is sufficient redundancy check, improve anti-jamming ability. Mbps Rate Transmission In the use of RF carrier signal transmission, using the Dbpsk method, DBPSK (differential binary phase shift keying) with two carriers of the digital signal 0 and 1 respectively, two carrier phase difference 180 °, a wave called the referenc

[Turn] attitude calculation of four-rotor aircraft small knowledge points

1, Inertial measurement unit IMU (inertialmeasurement unit)Attitude Heading Reference System ahrs (attitude and Heading Reference systems)Geomagnetic angular velocity gravity marg (magnetic, Angular rate, and Gravity)MEMS (Micro electrical Mechanical systems)DOF Dimension DOF (Dimension of Freedom)Unmanned aerial Vehicle UAV (unmanned aerial Vehicle)Extended Kalman Filter EKF (Extended Kalman Filter)Lossless Kalman Filter UKF (unscented Kalman Filter)Inertial navigation systems INS (inertial Nav

Wireless expansion scheme of WCDMA network

, and the station site should be determined for a lot of new stations; compared with GSM, WCDMA network capacity is more sensitive to the regularity of honeycomb structure, more stringent to station site and antenna height, and requires large-scale redesign of network. Scheme two: A large number of micro-cellular, deployment of layered Network (HCS), the macro-honeycomb and micro-cellular settings to different levels, the use of specific cell re-election or switching algorithms, will be in the

Entity Framework skill Series 9-tip 35-36

tentity getorcreateandattachstub This objectquery Expression ) Where tentity: Class{VaR context = query. context;VaR OSM = context. objectstatemanager;Tentity entity = OSM. Where (expression. Compile ()). Singleordefault ();If (entity = NULL){Entity = expression. Create ();Context. attachtodefaultset (entity );}Return entity;} In this step, find a match in objectstatemanager. If the lambdaexpression with m

6 HTML5-based multimedia players

Supported by Firefox, Safari, chrome, opera, and ie9. In addition, to be able to play a video, at least two video formats are required: H.264 (Safari/chrome) and Ogg (Firefox/opera ). This article describes 6 online multimedia players using HTML5 technology. 1. Open Standard media (OSM) player OSM player is an HTML5 multimedia player developed based on jquery and open source. If the browser

10 free HTML5 video players

/out transitions. Fryplayer Fryplayer is fast and easy to use HTML5 video player. main feature is that he is completely free to use! Mediaelement. js HTML5 audio and video players in pure HTML and CSS. Flarevideo HTML5 video with Flash fallback. Easy CSS/html/JS customization and theming. Full Screen support. Completely open source and free for your cial use. Kaltura Kaltura HTML5 Video Player allows you to play back HTML5 videos that are going to be inserted into a website. it is v

Overview of open source project opentripplaner for Path Analysis

The front-end directly involved opentripplaner, an open-source project with powerful functions. Here is a brief introduction: Opentripplanner (OTP) provides an open-source platform for multi-mode route planning. You can use the built-in Web interface of OTP to walk together, Bicycles and public transport are used to query routes. OTP also provides APIs called by third-party programs. Official website address: http://opentripplanner.com/ GitHub address: https://github.com/openplans/OpenTripPlanne

Openlayers Layer (Layers) detailed

ol.layer.Tile ({source: new Ol.source.MapQue St ({layer: ' Sat ' })], view: new ol. View ({center:ol.proj.transform ( [37.41 , 8.82 ], ' epsg:4326 ' , ' epsg:3857 ' ), Zoom: 2 })}); Which is the ol.layer.Tile slice layer type, the source is MapQuest, layerIs the type of the requested layer, MapQuest has three types of layers: osm , sat and, is the abbreviation for OPENSTREETMAP, the hyb

3DMax ofusion plug-in usage issues

Use Ofusion to export the ogre to live mesh This method is often used non-.Some of the questions here for a handy summary.1.OFusion gets:http://download.csdn.net/detail/bafghgle/2560230It also contains Chinese documents and demos.This version number only supports 3D max7,8,9.Ofusion Configuration in 2.3D maxOpen View: http://blog.sina.com.cn/s/blog_55ef1ead010154gd.htmlSpecific configuration: http://blog.sina.com.cn/s/blog_4c4a5644010008vk.htmlMaterial configuration: http://wenku.baidu.com/view/

How to load ogremax scenario files in ogre

OSMOsmscene * m_osmscene; This also includes the definition of OSM. I encapsulate the display of ogremax, OSM, mesh, and material into a class. CPP file implementation New ogremax: ogremaxscene (); M_maxscene = new ogremax: ogremaxscene (); Then add Void cscene: loadscene (){M_maxscene-> load (m_mediafilename, this-> m_window, ogremax: ogremaxscene: no_options );This-> m_scenemanager = m_maxscen

5 kinds of object-oriented and the way to develop JS object in JS

=========================================The first is a generic class from the Java perspective, and this class needs to be called when a new XX () object comes out.The fourth kind, from the Java point of view, is a singleton class! When you call it directly xxx.xx () This call, do not need new.The writing of SaikuDefining JS objects-> SettingsvarSettings ={//constant ConfigurationI18n_locale: "EN", query_properties: {' Saiku.olap.query.automatic_execution ':true, ' Saiku.olap.query.nonem

MySQL 5.6 read-committed Isolation level concurrent insertion of a single cable-guided fatal lock case

Tags: avoid _id price * * * Enable grant style Tin CommToday, a deadlock has occurred in an environment, as follows: (1) TRANSACTION:TRANSACTION 735307073, ACTIVE 0 sec insertingMySQL tables in use 1, locked 1Lock WAIT 6 lock struct (s), heap size 1184, 3 row lock (s), undo log Entries 1MySQL thread ID 2754, OS thread handle 0x7f29cd89a700, query ID 751744317 127.0.0.1 OSM updateINSERT INTO Tb_trd_secu_command (Machine_date, Company_no, product_id,Pro

hjr-Communication principle (i): Communication fundamentals

transmission rate is equal to twice times of the bandwidth to ensure the non-interference between the front and rear code elements. Rmax (maximum information transfer rate) = B*2 B: Bandwidth B. Noise (bandwidth and signal-to-noise ratio) Calculate with Shannon formula C: (channel capacity) channel error-free maximum information transfer rate, that is, rmax (information transfer rate maximum) B: Bandwidth S/N: Signal-to-noise ratio (db) The most common is the signal to noise ratio 30db, can g

Class internal creation and release

When using object pointers, C ++ often needs to consider the following issues: pointer initialization, object creation, and release. This will undoubtedly increase the burden on programmers. programmers should not only consider the business logic, but also always learn when to create and release pointers. Is there any way to solve this problem? The answer is yes. Here is an example to illustrate this mode. Suppose we want to simulate an aircraft carrier

LTE physical Transmission Resources (2)-band, channel bandwidth, and frequency point number EARFCN

, namely 1.4mhz,3mhz,5mhz,10mhz,15mhz,20mhz. The lower bandwidth of 1.4MHz and 3MHz allows for easy CDMA2000 use of the spectrum to be migrated to LTE while helping to facilitate the migration of GSM and TD-SCDMA to LTE. The purpose of a variety of bandwidth is to adapt to different frequency of the use of the scene, such as the frequency of the available bandwidth of less than 10MHz, then the LTE system can be configured to 5MHz use.not all channel bandwidth can be used as a resource for transm

IEEE 802.3 Ethernet

IntroductionEthernet is the most successful LAN (local area Networking) technology in the last 30 years. 1. First widely used LAN technology (a widely used LAN technology) 2. Kept up and speed race:10 mbps–100 Gbps 3. connectionless: No handshaking between sending and receiving NICs (network Interface card, network card) No connection is established. 4. unreliable: receiving NIC doesn ' t send ACKs or nacks to sending NIC Not reliable. Ack:acknowledgement, that is, the confirmation character, in

Chapter 4 Basic Principles of Wan

line, and exclusive bandwidth. Circuit Switching Mode: the connection between user devices is established on demand. When the user needs to send data, the carrier switch connects a physical data transmission path between the caller and the called end. When the user does not send data, the carrier switch disconnects the transmission path. Group switch: This is an exchange method based on the carrier's group

Use coretelephony to get the SIM card network operator name

Time:Conversion from below Http://zonble.net/archives/2010_06/1330.php. /System/library/frameworks/coretelephony. Framework/headers to build settingsHeader search paths, and add header files in these classes, such as 1. # im Conversion from http://zonble.net/archives/2010_06/1330.php belowAdd the header file directory/system/library/frameworks/coretelephony. Framework/headers to build to set the header search paths and add the header file in these classes. For example1. # import "ctcarrier. H"2

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