What are gateways, voice gateways, and VOIP gateways?

What is gateway? gateway is also called the inter-network connector and Protocol converter. The gateway is the most complex network interconnection device on the transport layer to achieve network interconnection. It is only used for different

Pentaho report designer

Pentaho report designer is a WYSIWYG open-source report design tool. When designing a report, you can drag and drop various report controls at will, and quickly and conveniently set the report data source. You can preview the report results at any

Thread security of struts 1 and Struts 2

In general, the action of struts1 is a singleton mode, so developers must ensure that it is thread-safe or synchronous, because in struts 1, each action has only one instance to process all requests.   However, the thread security issue is not

Ogre3D local illumination real-time Renderer (3ds max viewport plug-in)

This software can obtain the geometric objects, lights, cameras, and other information of the 3DS MAX scenario in real time and convert it to generate the scenario information in the ogre3d format, use the Ogre rendering engine to render the built

Grasp the Stream in VB. NET (2)

Grasp the Stream in VB. NET (2)   Flexible and diverse IO OperationSometimes conversion between data and byte arrays is cumbersome. To avoid these boring conversions and simplified code, it is wise to use streamreader/streamwrite and

Edison Chen's sex photo scandal may be avoided if file Delete absolutely was used.

    Edison Chen's Sex photo scandal may be avoided if File Delete Absolutely was used.       Nowadays, people are afraid of the leaking of their secrets result from deleted file recovery more and more because they depend on computers more and more.  

DB query analyzer ranks 12th in the "Zhongguancun online" rankings

The Chinese version of the universal database query analyzer, "DB query analyzer" in "Zhongguancun online"In the Daily Download ranking, there are basically between 12th and 19th.    This is another one to commemorate.         In theZhongguancun

From binary complement to decimal complement and its internal operation -- learning about Complement

  Question: enter two integers a, B,-10100 This is a very simple question, because a and B may be positive or negative, so a-B, a-(-B),-a-B,-A-(-B. There is a-B after parentheses,-(A-B), a + B,-(a + B. Writing code is still annoying. If we think of

D-bus Learning (10): telepathy on D-bus [1]: paper discussion

Now we have many identities on the Internet. For example, I have three or four MSN accounts, QQ, GTalk, and web-based blogs and vblogs, in short, there are many. For small-sized mobile phones and MID-sized handheld devices, we cannot open N clients

Kernel module programming (13): semaphore, mutex lock, read/write semaphore, and completion volume

Document directory Semaphores and mutex Read/write semaphores Completion (the Chinese name is unknown, which may be the number of completions, ^ _ ^) This article is the second reading note of chapter 5 Concurrency and Race Conditions of LDD3

Data warehouse design steps, prohibitions and ideas

  Seven steps for efficient data warehouse implementation The data warehouse has some kinship with our common RDBMS systems, but it is different. If you have not implemented a data warehouse, from setting goals to providing design, from creating a

10 fresh css3 text effects and web typographical tutorials recommended

One of the major changes in css3 is the Web typographical technology. Now we can achieve rich text style effects without using any JavaScript or images. This article collects 10 practical css3 text effects and web typographical tutorials. I hope you

Application of multithreading technology in Real-time Data Collection and Analysis

Application of multithreading technology in Real-time Data Collection and Analysis [Date: 2008-7-23] Source: China Power Grid Author: He Jia, College of Automation Engineering, University of electronic science and technology, Li Wang

Low-cost high-speed differential amplifier AD8132

Low-cost high-speed differential amplifier AD8132 [Date:] Source: carefree e-development network Author: Qu cuixiang Li Gang [Font:Large Medium Small]   1 OverviewAD8132 is a low-cost amplifier with single-input or

Power Supply Design of Radar Video Signal Simulator Based on TPS54310

Power Supply Design of Radar Video Signal Simulator Based on TPS54310 [Date: 2008-10-13] Source: foreign electronic components by Liu Donghai, Ren Yongfeng, Li shengkun [Font:Large Medium Small]   1 IntroductionThe radar video

Connection Methods for serial communication: 9-pin/25-pin

Connection Methods for serial communication: 9-pin/25-pin Basic connection method for Serial Communication Currently, the commonly used serial ports include 9-pin serial ports (DB9) and 25-pin serial ports (DB25). When the communication distance

Adore rootkit Analysis

Generally, lkm is used to provide additional functions for the system without re-compiling the kernel, such as loading device drivers and other hardware drivers. Linux, Solaris, and BSD (free, net, and open) operating systems allow the ability to

Mencoder intercepts avi (or flv) into flv

Mencoder "/home/guo/Videos/hp. flv "-o"/home/guo/Videos/hp/outfile. flv "-of lavf-oac mp3lame-lameopts abr: br = 56-ovc lavc-lavcopts vcodec = flv: vbitrate = 5000: mbd = 2: mv0: trell: v4mv: cbp: last_pred = 3: dia = 4: cmp = 6: vb_strategy = 1-vf

PB Development notes (8)

// Basic window (pb) with adaptive screen resolution)Make an adaptive screen resolution window as the base class of all forms in an application. In this way, the entire program can be well adapted.The screen resolution changes. The implementation

Struts 2 tag Library (1) -- tag library Basics

1. Why label? When a JSP page is embedded with a large number of Java scripts, the readability of the entire page decreases, and the readability also decreases. Advantages of using custom tags: simple, conducive to team collaboration, high

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