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PGPI(NUM,DEN,W,FI,A) plots the stability boundary locus L(KP,KI,W)in the (KP,KI)-plane for an LTI system with transfer function defined by its NUM, DEN coefficients and driven by a PI controller with transfer function, C(s)=kp+(ki/s). Frequency (W) gridding becomes important. Phase Margin, FI, and Gain Margin, A, can be defined. The method works for open loop stable or unstable, minimum or nonminimum phase systems. With Examples. Method and examples used are form "Computation of Stabilizing PI and PID Controllers" by Nusret Tan, Ibrahim Kaya and Dereck P. Atherton. MATLAB release MATLAB 7.5 (R2007b)

optimization with iteration pso

koch曲线绘制的简单matlab小程序,帮助大家更好理解分形(koch figure plot on matlab )

solving 1d transport (advection + diffusion)problem: dQ/dt+U dQ/dx=alpha d2Q/dx2

ieee paper on sensor routing

数值分析—全主元高斯消去法解线性方程组 (Numerical Analysis- Full-PCA Gaussian elimination method for solving linear equations)

For example, heating up the temperature in a room is a process that has the specific, desired outcome to reach and maintain a defined temperature (e.g. 20°C), kept constant over time. Here, the temperature is the controlled variable. At the same time, it is the input variable since it is measured by a thermometer and used to decide whether to heat or not to heat. The desired temperature (20°C) is the setpoint. The state of the heater (e.g. the setting of the valve allowing hot water to flow through it) is called the manipulated variable since it is subject to control action

基于AR原理，对随机过程进行了monte carlo模拟。对结构的抗风、抗震设计有参考价值(Monte carlo simulation of random process based on the AR principle. On the structure of the wind, seismic design of the reference value)

This function(s) can be used to interactively view any kind of 3D image volumes like CT and MRI, and for distance measurements or ROI selection in 2D slices. It includes Maximum intensity projections (MIP), Volume Rendering (VR) , Slice render, and colored and Phong shaded Volume rendering. Voxel opacity and color tables can be changed on the fly allowing also iso surface kind of renders. The fast render algorithm which renders a 3D volume to a 2D image, is based on a Matlab coded implementation of the Shear-Warp transform, in which instead of rotating the viewer rays the slices are sheared.

LEG是线性图嵌入算法的matlab源码(LEG code for face recognition)