fifthpsk

these are fuction descriptions of different spectrum sensing methods

pca数据降维程序，包括取均值、计算协方差矩阵等详细步骤。(the pca Data dimensionality reduction procedures, including averaging, calculated covariance matrix detailed steps.)

Low pass filter for frequency domain

ldpc码在在twoto矩阵，即时间控制，频率两个参数变量的系统内仿真，matlab7.0编译通过。(LDPC code in twoto matrix, namely the time control, the frequency of the two parameters of the system simulation variables, matlab7.0 compiled through.)

模糊PID控制器设计 针对二阶传递函数，设计一个模糊控制器(fuzzy PID controller design)

说明：  验证中心极限定理，即将若干个不相关随机变量相加(Verify the central limit theorem, not related to the forthcoming number of the sum of random variables)

针对一阶惯性加纯滞后环节的系统，利用大林算法对其进行理论分析和离散化，并且设计出数字控制器，分析振铃现象(For first-order inertial system plus time lags, the use of Dahlin its theoretical analysis and discrete, and digital controller design, analysis ringing)

半监督的支撑向量机回归建模方法，代码齐全，可以在数据少的情况下建好模型(semisupervised support vector machine)

学生学籍管理，可用于输入学生成绩后显示成绩，并且算出平均值，标准差等许多用途(Student Management can be used to display after input student achievement scores and calculate the average, standard deviation, many uses)

TS模糊，包括聚类数选取，输入选择，前件辨识，后件辨识等(TS Fuzzy Model)