基于H323和SIP协议的视频会议网关的设计和实现750000027

Teach Yourself C++ in 21 Days, Second Edition Week 1 at a Glance: Day 1 Getting Started Day 2 The Parts of a C++ Program Day 3 Variables and Constants Day 4 Expressions and Statements Day 5 Functions Day 6 Basic Classes Day 7 More Program Flow Week 1 in Review Week 2 at a Glance: Day 8 Pointers Day 9 References Day 10 Advanced Functions Day 11 Arrays Day 12 Inheritance Day 13 Polymorphism Day 14 Special Classes and Functions Week 2 in Review Week 3 at a Glance: Day 15 Advanced Inheritance Day 16 Streams Day 17 The Preprocessor Day 18 Object-Oriented Analysis and Design Day 19 Templates Day 20 Exceptions and Error Handling Day 21 Whats Next Week 3 in Review + Appendixes

相位比较器的VHDL实现程序，现行的相位比较器结构往往十分复杂，难于实现。而在一些对精度要求不是很高的领域，简单灵活的相位比较算法有着广阔的市场。-Phase comparator realize the VHDL program, the existing structure of the phase comparator is often very complex and difficult to realize. In some of the precision of the field is not very high, simple and flexible algorithm for phase comparison with a broad market.

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zemax源码： This DLL models a standard ZEMAX surface type, either plane, sphere, or conic The surface also demonstrates a user-defined apodization filter The filter is defined as part of the real ray trace, case 5 The filter can be used at the stop to produce x-y Gaussian apodization similar to the Gaussian pupil apodization in ZEMAX but separate in x and y. The amplitude apodization is of the form EXP[-(Gx(x/R)^2 + Gy(y/R)^2)] The transmission is of the form EXP[-2(Gx(x/R)^2 + Gy(y/R)^2)] where x^2 + y^2 = r^2 R = semi-diameter The tranmitted intensity is maximum in the center. T is set to 0 if semi-diameter < 1e-10 to avoid division by zero. -ZEMAX source: This DLL models a standard ZEMAX surface type, either plane, sphere, or conic The surface also demonstrates a user-defined apodization filter The filter is defined as part of the real ray trace, case 5 The filter can be used at the stop to produce xy Gaussian apodization similar to the Gaussian pupi

Wince驱动程序开发 嵌入式程序开发-wince

wml开发的相关文档，中文版。希望对初学者有帮助-wml development of relevant documents, the Chinese version. Want to be helpful for beginners

手机的软件工作原理 手机的软件工作原理-Working principle of mobile phone software mobile phone software working principle

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java code Displaying multiple strings in an applet

一本非常优秀的电子电器工程的基础教材和工程人员的英语参考书 Pricinples and fundamentals of electrical engineering-an excellent electrical and electronic engineering materials and the foundation works of English reference books Pricinp les and fundamentals of electrical engineerin g