Chap_4

说明：  学习MATLAB中的关系运算和逻辑运算，掌握它们的表达形式和用法。掌握MATLAB 中的选择结构和循环结构。学会用MATLAB进行M文件的编写和调用。 (Learning MATLAB relational and logical operations, control their expression in the form and usage. Master MATLAB selection structure and loop structure. Learn to write and call the M-file with MATLAB.)

说明：  基于密度的聚类算法因其抗噪声能力强和能发现任意形状的簇等优点，在聚类分析中被广泛采用，本文提出 的基于相对密度的聚类算法，在继承上述优点的基础上。有效地解决了基于密度的聚类结果对参数值过于敏感、参数 值难以设置以厦高密度簇完全被相连的低密度簇所包含等问题。(Density-based clustering algorithm because of its strong resistance to noise and can find clusters of arbitrary shape, etc., in the cluster analysis is widely used, the proposed clustering algorithm based on the relative density, in succession on the basis of the above-mentioned advantages. Effectively solve the density-based clustering results on the parameter value is too sensitive, difficult to set the parameter value to high-density clusters of buildings connected to the low-density clusters are completely contained and other issues.)

The methods of Otsu used to tresholding image. this code build it. you can use it to treshold image is easy

说明：  《载波相位相对定位双差方程原理》验证 《载波相位相对定位单差方程原理》验证 《载波相位相对定位双差方程原理》验证 《载波相位相对定位双差方程原理》验证当基站离流动站很近，并假设流动站概略坐标等于基站坐标，那么双差方程中距离向量就为0(&quot Double difference carrier phase relative positioning equation theory&quot test &quot single-difference carrier phase relative positioning equation theory&quot test &quot double difference carrier phase relative positioning equation theory&quot test &quot double difference carrier phase relative positioning equation principle&quot is verified when the base station from the mobile station near, and assuming that mobile station is equal to the base station coordinates approximate coordinates, so double-differential equation from the vector is 0)

simulink 仿真教程，详细介绍了simulink的仿真环境及模型的创建(simulink simulation tutorial, detailing the simulink simulation environment and model creation)

spwm using matlab simulink model

三相全桥可控整流电路的simulink仿真,改变触发角并通过示波器来观察线电流、负载输出电压和电流(three-phase full-bridge controlled rectifier simulink)

实现WiMAX物理层小数时延和整数时延的方法，并搭建了物理层仿真平台(Implement WiMAX fractional delay and integral time delay method, the physical and built the physical simulation platform)

二相编码信号的产生以及频谱分析，可以产生7位、11位、13位典型编码信号以及13位bark码的频谱图，通过仿真可用(Two-phase coded signal generation and spectrum analysis, can produce 7, 11 and 13 typically coded signals and 13 yards of bark frequency spectrum, through the simulation can be used)

卷积码编码器的实现，是误码性能分析的一部分(Implementation of convolutional encoder)