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this code for pr classroom code useful

Koch曲线是通过图形迭代的方式产生的，其迭代规则是：对一条线段，首先将它分成三等份，然后将中间的一份替换成以此为底边的等边三角形的另外两条边。无限次迭代下去，最终形成的曲线就是Koch曲线。(Koch curve is generated by way of graphical iteration, and its iteration rule is: for a segment, it is divided into three equal parts first, and then replace the middle of a bottom side of this equilateral triangle to the other two edges. Infinite iterations continue, the final form of the curve is the Koch curve.)

计算光子晶体态密度的程序，与文献吻合，只要小的修改就可计算其他结构的态密度(photonic crystal calculation of the density of states procedures, in line with the literature, as long as minor modifications other structures can be calculated density of states)

This is a matlab code for fast fourier transformation using gaussian filter

这是一个接收机中的定时同步程序，可供设计接收端的同学进行参考(This is the timing code of the OFDM receiver.)

用于人脸检测的方法，附带文章和源程序。效率高！(Face detection method is used, with articles and source code. Efficient!)

M file of Matlab code (integro differential of iris ) .

基于matlab的光伏电池阵列仿真模型，可以真实反应光伏电池随时间及温度变化规律(Matlab array of photovoltaic cells based on the simulation model can accurately reflect the temperature of photovoltaic cells and the variation with time)

说明：  数值计算方法理论 比较早的一本书 549页(Earlier theory of numerical methods in a book 549)

一个matlab阈值分割程序，再matlab下能运行(a Matlab threshold segmentation procedures, and then to run under Matlab)