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speech Stft pitch detection

shi使用MATLAB用杜哈美积分方法计算多自由度体系任意荷载下的结构位移大小(Shi uses MATLAB to calculate the structural displacement of the multi degree of freedom system under arbitrary loads by using the method of the)

Pulse-width modulation

说明：  FDA-MIMO雷达距离角度联合无模糊估计的MATLAB仿真(MATLAB simulation of joint unambiguous estimation of range and angle for FDA-MIMO radar)

该程序是基于时间延迟求和的波束成形算法的实现，根据是结果来看有很好的效果(The program is based on the sum of the time delay beamforming algorithm, based on results, there is a good effect)

matlab的优化算法，经典算法，可用于数学建模(matlab optimization algorithm, the classical algorithm can be used for mathematical modeling)

矢量控制是目前交流电机的先进控制方式，一般将含有矢量变换的交流电机控制都称 之为矢量控制，实际上只有建立在等效直流机模型上，并按转子磁场准确定向的控制，电机才能获得最优的动态性能。 矢量控制的基本思路是以产生相同的旋转磁动势为准则，将异步电机在静止三相坐标系上的定子交流电流通过坐标变换等效成同步旋转坐标系上的直流电流，分别加以控制，以达到直流电机的控制效果。(Vector control is an advanced control method of AC motor at present. Generally, vector control is called vector control. In fact, only based on the equivalent DC motor model and accurately oriented control according to the rotor magnetic field, can the motor obtain the optimal dynamic performance. The basic idea of vector control is to generate the same rotating magnetomotive force as the criterion. The stator AC current of asynchronous motor in the static three-phase coordinate system is converted into DC current in the synchronous rotating coordinate system by coordinate transformation, and then controlled separately to achieve the control effect of DC motor.)

变邻域，含变惯性权重策略的自适应离散粒子群算法，完美运行，适应函数是多式联运路径优化实例计算(Variable Neighborhood, Adaptive Discrete Particle Swarm Variable inertia weight strategy perfectly, fitness function is multimodal path optimization calculation examples)

PFC电路仿真，分析器各个工作模态和各种关键波形(PFCModal, and a variety of key waveforms of the PFC circuit simulation, analyzer work)

matlab中的彩色图转换成灰度图后的最新集中算法的运用的边缘检测(The color chart matlab edge detection)