gps

运用粒子群优化算法对ARMA(p,q)模型的阶数进行优化是可行的，且利用优化后的ARMA模型对航空发电机状态趋势进行分析的结果十分准确，与原始数据所表现出的航空发电机状态变化趋势基本一致。经计算，此时分析结果的平均相对误差较小，仅为1.38 ，与优化前构建的ARMA模型相比，平均相对误差降低0.23个百分点，优化效果明显。(Using particle swarm optimization algorithm to optimize the order of the ARMA (p, q) model is feasible, and the use of the results of the ARMA model optimized air generator status trends analysis is very accurate, and the raw data showed aviation the generator status consistent trend. Calculated analysis of the results, the average relative error is small, only 1.38 , compared with the the ARMA model built before optimization, average relative error is reduced by 0.23 percentage points, to optimize the effect is obvious.)

经典的信道估计方法。比较详细，可以运行。主要是LS估计(Classic channel estimation method. In more detail, you can run. LS estimate)

Closed form BER for Alamouti Code

基于matlab的摄像机标定代码，精度很高，可直接用于程序。(Camera Calibration Based on matlab code, high precision, can be used for procedures.)

matlab使用的N个实用技巧及其程序实现。(N-use practical skills and procedures matlab implementation.)

基于状态空间模型的预测控制程序，参考了钱积新的《预测控制》(Predictive control program based on state space model, refer to the Qian Jixin’ s predictive control )

一段空间梁的Matlab源文件程序，仅供参考学习(A space beam of the Matlab source file procedures, only reference learning)

说明：  关羽调频广播的很好的几篇文章，值得一看。(Guan Yu, a good FM radio articles, worth a visit.)

两个平面波展开程序，关于二维结构，希望对大家有所帮助。(Two plane wave expansion method programs,about two dimensional structure.)

针对结构转角信息难以测量的问题，采用转角信息重构技术由随机子空间从振动信号中提取的结构平动位移估算结构转动位移，然后构建改进的单元损伤变量(Since it is difficult to measure the rotational responses of a structure, a technique was adopted to evaluate the approximate modal rotations with the modal displacements, which were extracted from structural vibrational signals with stochastic subspace identification, by static condensation and QR decomposition)