paint

二维码编码，QR码实现，Two-dimensional coding, QR code to achieve, Two-dimensional coding(Two-dimensional coding, QR code to achieve, Two-dimensional coding)

GPS输出的经纬度坐标转换为大地直角坐标(GPS output of geodetic latitude and longitude coordinates is converted to Cartesian coordinates)

Heat Equation with variable coefficients. Solution of the heat equation using point gauss method

各种奇异值分解的源码程序，内容详细易懂，可以直接在自己的程序中调用使用(Singular value decomposition of various program source code, detailed and easy to understand, you can call directly in their own procedures)

This simulink model simulates the damped driven pendulum, showing it s chaotic motion. theta = angle of pendulum omega = (d/dt)theta = angular velocity Gamma(t) = gcos(phi) = Force omega_d = (d/dt) phi Gamma(t) = (d/dt)omega + omega/Q + sin(theta) Play with the initial conditions (omega_0, theta_0, phi_0 = omega(t=0), theta(t=0), phi(t=0)) and the system parameters (g, Q, omega_d) and the solver parameters/method. Chaos can be seen for Q=2, omega_d=w/3. The program outputs to Matlab time, theta(time) & omega(time). Plot the phase space via: plot(mod(theta+pi, 2*pi)-pi, omega, . ) Plot the Poincare sections using: t_P = (0:2*pi/omega_d:max(time)) plot(mod(spline(time, theta+pi, t_P), 2*pi)-pi, spline(time, omega, t_P), . ) System is described in: "Fractal basin boundaries and intermittency in the driven damped pendulum" E. G. Gwinn and R. M. Westervelt PRA 33(6):4143 (1986) (This simulink model simulates the damped driven pendulum, showing it s chaotic motion. theta = angle of pendulum omega = (d/dt)theta = angular velocity Gamma(t) = gcos(phi) = Force omega_d = (d/dt) phi Gamma(t) = (d/dt)omega+ omega/Q+ sin(theta) Play with the initial conditions (omega_0, theta_0, phi_0 = omega(t=0), theta(t=0), phi(t=0)) and the system parameters (g, Q, omega_d) and the solver parameters/method. Chaos can be seen for Q=2, omega_d=w/3. The program outputs to Matlab time, theta(time) & omega(time). Plot the phase space via: plot(mod(theta+pi, 2*pi)-pi, omega, . ) Plot the Poincare sections using: t_P = (0:2*pi/omega_d:max(time)) plot(mod(spline(time, theta+pi, t_P), 2*pi)-pi, spline(time, omega, t_P), . ) System is described in: "Fractal basin boundaries and intermittency in the driven damped pendulum" E. G. Gwinn and R. M. Westervelt PRA 33(6):4143 (1986) )

说明：  本程序为粒子群算法的源代码可应用于微电网的多目标经济优化调度(This program is the source code of particle swarm optimization algorithm and can be applied to multi-objective economic optimal dispatch of microgrid)

说明：  matlab图像处理函数............(for matlab user to )

this file is very useful for student to calculate structures with MATLAB

工学硕士论文，基于自适应卡尔曼滤波的捷联惯导非线性对准技术研究, (Engineering master's thesis, based on adaptive Kalman filtering SINS Nonlinear Alignment Technology,)

高斯信道与瑞利信道下PSK误码率分析,用于通信分析(Gaussian channel and Rayleigh channel BPSK BER analysis for traffic analysis)