signal

材料力学上机的弯曲梁程序（GUIDE），可以作为参考(Mechanics of materials bending beam program (GUIDE))

魔术公式，汽车模型，四轮的，但没有数据，有公式(Magic formula，Car model)

用matlabe产生随机序列,用matlabe产生随机序列(matlab prbs,matlab prbs,matlab prbs)

说明：  非线性系统中混沌liu氏函数的matlab实现(Chaos liu' s function)

program about base isolation structure

一组取值为+/-1的随机序列，每两个数据之间插入3个0，然后将序列通过一个设计好的根升余弦滤波器，并用周期图法和Welch法分别绘制信号的功率谱。再次通过根升余弦滤波器后用stem函数绘图。(A set of values ​ ​ is+ /-1 random sequence inserted between every two data 3 0, then the sequence through a root raised cosine filter designed, periodogram and Welch method to draw the signal powerspectrum. Stem function by root raised cosine filter with drawing again.)

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.)

A MATLAB code for fingerprint enhancement.

小电流开关二极管1N4148的详细介绍，包括工作特性和参数(Low current switching diodes 1N4148 in detail, including the operating characteristics and parameters)

扇形传感器区域覆盖优化的虚拟力导向粒子群算法(Fan-shaped area coverage sensor-driven power optimization of the virtual particle swarm optimization)