2

PCA技术的一大好处是对数据进行降维的处理。我们可以对新求出的“主元”向量的重要性进行排序，根据需要取前面最重要的部分，将后面的维数省去，可以达到降维从而简化模型或是对数据进行压缩的效果。同时最大程度的保持了原有数据的信息。 (A major advantage of PCA technology is reduce the dimension of the data processing. We can calculate the new " principal component" vector order of importance, according to need to take the most important part of the front, eliminating the rear of the dimensions, dimension reduction can be achieved to simplify the model or the effect of data compression . At the same time maintaining the greatest degree of the original data.)

采用matlab编程实现的近似熵的计算。近似熵是一个从衡量时间序列复杂性的角度出发的反映信号整体特征的指标(Calculated using approximate entropy matlab programming to achieve. Approximate entropy is a sequence complexity measure of the time of departure the perspective of the indicators reflect the overall characteristics of the signal)

说明：  直流微电网中常用的DC/DC变换器仿真模型，可以作Buck变换器，也可以作Boost变换器。(The simulation model of DC / DC converter commonly used in DC microgrid can be used as buck converter or boost converter.)

数字FIR滤波器器设计，通带截止频率0.3pi，阻带截止频率0.2pi，通带衰减《=1db，阻带衰减》=40db(Digital FIR filter design, the passband cutoff frequency 0.3pi, stopband cutoff frequency 0.2pi, pass-band attenuation " = 1db, stop-band attenuation" = 40db)

短时傅里叶变换仿真，步长不同时候的比较图形(STFT simulation)

用局部参数最优化方法设计一个模型参考自适应系统,可调增益的初值Kc(0)=0.2，给定值r(t)为单位阶跃信号，即r(t)=A×1(t)。 要求： 1把连续系统离散化(采样时间可取0.1)。 2编制并运行这个系统的计算机程序(注意调整B值，使系统获得较好的自适应特性)。 3记录ym、yp的曲线 记录kp×kc的曲线 记录广义输出误差e的变化曲线。 4在参数收敛后，让Kp=2变为Kp=1，重新观察Kp×Kc及e的变化曲线。 5找出在确定的B值下，使系统不稳定的A值(阶跃信号的幅值)，并与用劳斯稳定判据计算的结果比较。 (With local parameter optimization method to design a model reference adaptive system, adjustable gain initial Kc (0) = 0.2, for a given value of r (t) for the unit step signal that r (t) = A × 1 ( t). Requirements: a continuous system discretization (sampling time of 0.1 preferred). 2 compiled and run the system computer program (Note B to adjust the value of the system to obtain better adaptive characteristics). 3 records ym, yp curve record kp × kc curve records generalized output error e curves. 4 parameter convergence, let Kp = 2 into the Kp = 1, re-observed Kp × Kc and e curves. B-5 to find value in determining the next, making the system unstable A value (step signal of amplitude), and using Routh stability criterion and the comparison of the results calculated.)

am and fm modulation

灰色预测matlab程序与散点图的绘制的matlab程序(Grey prediction matlab program and scatter diagram of MATLAB program )

随机间距稀疏三元循环相位掩膜矩阵可压缩成像.pdf(Sparse Trinary Circulant Measurement Matrices with Random Spacing in Compressive Imaging)

simulation of Dynamic Voltage Restorer in MATLAB simulink software.