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直接数字式频率合成器DDS设计、Verilog。 产生的信号可以是正弦波或方波、三角波、锯齿波等，自选。 采用DDS技术，将所需生成的波形写入ROM中，按照相位累加原理合成任意波形。 此方案得到的波形稳定，精度高，产生波形频率范围大，容易产生高频。 本实验在设计的模块中，包含以下功能： （1）通过 freq 信号输入需要的频率的值； （2）通过 wave_sel 信号选择所需的波形； （3）通过 amp_adj 信号选择波形放大的倍数。(DDS design of direct digital frequency synthesizer, Verilog. The generated signal can be sinusoidal or square wave, triangular wave, sawtooth wave and so on, optional. By using DDS technology, the required waveforms are written into ROM, and arbitrary waveforms are synthesized according to the principle of phase accumulation. The waveform obtained by this scheme is stable, accurate and easy to generate high frequency waveform. This experiment includes the following functions in the designed module: (1) Input the required frequency value through freq signal; (2) Choosing the required waveform by wave_sel signal; (3) Select the multiplier of waveform amplification by amp_adj signal.)

GS1 DataMatrix Introduction and technical overview

说明：  声学基础 -南大版课后习题答案，清晰版本，89页版本(Fundamentals of Acoustics - answer to exercises in Nantah)

手机设计基本原理,对于研究手机这一块很有帮助.-The basic principles of mobile phone design, the study of this piece of useful phone.

两篇关于模型简化的博士论文，对于研究模型简化方面的很有用。(2 on a simplified model of doctoral thesis research model for the simplification of very useful.)

工件加工问题，本程序提供了工件加工问题的一般算法question1 question2 question3经过调试能成功运行-workpiece machining, the process of machining the general algorithm question1 question2 question3 after the successful operation Debugging

说明：  another incremental change is made to the new solution, and so on until no further improvements can be found.

说明：  For all?who is interesting reversing

A fast replacement memory manager for Embarcadero Delphi Win32 applications that scales well under multi-threaded usage, is not prone to memory fragmentation, and supports shared memory without the use of external .DLL files.

字符编码简介：ASCII，Unicode，UTF-8，GB2312 -About character encoding: ASCII, Unicode, UTF-8, GB2312