傅里叶变换和傅里叶变换的性质,周期信号和非周期信号的频谱分析,卷积和卷积定理,抽样信号的傅里叶变换和抽样定理,相关、能量谱和功率谱.-Fourier transform and Fourier transform nature, the cycle-cycle signal and the signal spectrum analysis, Convolution and convolution theorem, the sampling signal to the Fourier transf

轮盘法随机抽样(实数)，抽100次后再依出现频率排序 call function quick Sorting-RouletteWheel

RouletteWheel.java 轮盘法随机抽样(实数)，抽100次后再依出现频率排序K-Means.java -ouletteWheel.java roulette randomly sampling (real number), pumping 100 times and then sorted according to frequency of occurrence

此系统适用于学生成绩系统管理,特别是模拟抽样检测-This system is suitable for systems management student achievement, especially in analog sampling

简单flash，实现简单的抽样定理，清晰可辨，易懂(Simple flash, simple sampling theorem, clear and easy to understand.)