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Simple threshold segmentation of medical CT data in DICOM data representation.

说明：  是对遗传算法和神经网络的讲解，自己感觉比较好，所以就传了(Is a genetic algorithm and neural network to explain that he felt better, so I passed on)

计算基本全局阈值算法,代码简单，适合初学者，本人亲自试验过，方法可行(Calculation of basic global threshold algorithm, the code is simple, suitable for beginners, I personally tested the method is feasible)

this is for mini project

余弦波是渐变的，当ωt+φ的取值变化量很小时，Y的变化量也是很微小的。余弦波的这一特性保证了嵌入水印后相邻字符灰度值差别不大，人眼无法识别，从而保证了水印的不可见性和图像质量。(Cosine wave is gradual, and when ωt+ φ values variation is very small, Y amount of change is very small. Cosine waves This feature ensures that watermarked gray value of adjacent character is not very different, the human eye does not recognize, thus ensuring the invisibility of watermark and image quality.)

在数学建模中关于炮弹弹道问题相关的一些程序(Some of the procedures in the mathematical modeling ballistic)

this matlab source code is for begining

matlab环境下的时频分析，有仿真结果，有程序，希望对初学者有用(matlab Frequency-time analysis)

说明：  选择快速分析法，进行信号分离，所得到的结果，可以很好的与源信号相匹配。(Select the fast analysis method to separate the signal, the result can match the source signal very well.)

有限元方法求解laplace 方程(matlab),可以用混合单元，混合边界条件(sloving Laplace eauations with finite element methods. )