timefre

通过BUTTERWORTH滤波器,讲语音信号中的噪声过滤掉.(By BUTTERWORTH filter, speaking voice signal in the noise filtered out.)

说明：  建立并绘制任意信号的模糊函数。已在巴克码，线性调频，脉冲信号中测试过。(This program estimates and plots the ambiguity function for any signals. I have tested it for the Barker code, chirp signal, pulse signal. for good results the length of the input vector (Ut)should be more than 7. Example- a rectangular pulse should be described as[1 1 1 1 1 1 1]. Please, give your suggestions. it is made with the help of "xcorr" function (Author: R. Losada) in MATLAB and Ilia Iliev from TU-Sofia )

雷达信号处理，做雷达的一定要看看 很好的课件 南京理工大学(Radar signal processing, make sure to look good radar courseware Nanjing University)

matlab program for power system three phase faults

eps的东西，做得挺好的 eps的东西，做得挺好的(eps thing, doing something very good eps, doing very good)

DDS中的正余弦生成，初始相位相差90度，可自行改变输出频率(Cosine generation of DDS, the initial phase difference of 90 degrees, the output frequency can be changed on their own)

计算数据包络分析中的ccr和bcc模型决策单元的效率值松弛变量的值等(calculate the efficiency and slack of ccr and bcc model in matlab )

matlab揭秘 matlab入门书籍 初学者可使用(matlab Secret matlab entry books Beginners can use)

说明：  水准路线平差计算程序，程序里面含有详细的中文解释，通俗易懂，便于应用。(Line level adjustment calculation program, the program which contains a detailed explanation of the Chinese, user-friendly, easy to use. )

多端直流输电系统(multi-terminal DC，MTDC)为解决 大型风电基地功率外送的瓶颈问题提供了一个最佳解决方 案。研究了基于电压源换流器(voltage source converter，VSC) 的多端直流输电系统应用于大规模风电功率长距离外送时 的协调控制策略。通过构建一个四端系统连接两个大型风电 基地及本地电网向远方负荷中心进行功率输送，实现了风电 场的功率汇集和外送。仿真验证了该协调控制策略在大扰动 情况下，不仅能够提高VSC-MTDC系统潮流重新分配的能 力，而且可使风电场对直流网络提供一定功率支撑，增强了 电力系统动态稳定性 (Multi-terminal DC (MTDC) power transmission system is regarded as the optimal solution scheme to sent out power from large-scale wind farm. A coordinated control strategy for voltage source converter (VSC) based MTDC transmission system applied to long-distance power transmission from large-scale wind farm is researched. By means of constructing a four-terminal system connecting two large-scale wind power bases with local power grid to send out power to faraway load center, the wind power converging and sending out by the proposed coordinated control strategy are implemented. Simulation results show that the proposed coordinated control strategy not only can improve the ability of reallocating power flow in VSC-MTDC transmission system under large disturbance, but also can make wind power base providing a certain power support to DC transmission network, thus the dynamic stability of power grid can be enhanced. )