tuxiangchuliGUI

frequency response of first order discrete time systems.

Protocol definitions RFC 3643 - Fibre Channel Frame Encapsulation.

It is a drilling system control

本文的秘密编码离理想的码率还很远，建立的无 条件秘密通信系统的稳定性和秘密性有待进一步证明，无条件安全系统秘密编码 方案还处于起步研究阶段，还有很多新的突破点等待研究。(Stability and secrecy of the secret coding bit rate still far from the ideal, the establishment of the unconditional secret communication system needs to be further proof, the the unconditional security system secret coding scheme is still at an early research stage, there are a lot of new breakthrough wait for research .)

介绍了数字通信中的QPSK调制解调的原理，通过用Matlab编写脚本程序对QPSK通信系统的发射和接收过程的具体实现进行模拟仿真，绘出信号在理想信道和加噪信道中模拟传输时的时域图，并对各模块进行了频谱分析，所得到的结果与 理论基本相符，对于理解QPSK系统的性能并在系统的实际应用上作进一步的设计，提供了有效的参考依据。 (The introduction was done with the principle of the QPSK modulation and demodulation in digital communications，a script was written by using Matlab program to CalTy out a simulation of the QPSK communication system．which contains the concrete realization of transmit and receive process．The time-domain diagram is drew separately when the signal transmits in the ideal channel and in the channel with noise，spectral analysis of each module is also done，the results obtained with theoretical results in the main，which provides an effective frame of reference for understanding the performance of QPSK systems，and the practical application in the system to make further designed．)

说明：  过零点检测 识别正弦波的过零点 进行过零点的检测 识别正弦波的过零点(Zero crossing detection to find the zero crossing of sine wave)

class to produce an X.509 Version 3 certificate.

用于读取sgy地震数据的matlab小程序，方便大家理解sgy文件存储规则(procedure for sgy file reading)

被广泛应用于机器人的设计和仿真，是机器人行业的重要工具(Is widely used in robot design and simulation is an important tool in the robot industry)

Simulation sous simulink, de la machine asynchrone triphasée avec commande Scalaire, et modele dq de la MAS