a

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.)

说明：  给予神经网络的大视场光学系统畸变曲线拟合(Given the large field of neural network optical system distortion curve fitting)

主要介绍了MATLAB编程的风格，以及编程中的技巧和规范，适于对MATLAB有一定了解的人(Introduces MATLAB programming style, as well as programming skills and norms of MATLAB for those who have a certain understanding of)

说明：  2019年第16届华为杯数学建模F题第一问的代码(Code of the first question of mathematical modeling F of the 16th Huawei cup in 2019)

matlab下的离散系统仿真模型和相关事例,具有很好的参考价值(matlab under the discrete system simulation model and related stories are very good reference value)

pn gold code for spread spectrum

matlab 实现基于dbdcan的聚类算法，帮你在matlab中简易的实现了解( it helps you study cluster alogroim in the matlab )

MATLAB 程式设计，MATLAB基本运算 MATLAB基本平面绘图 MATLAB基本立体绘图 (MATLAB programming, MATLAB basic computing basic plane MATLAB basic three-dimensional graphics MATLAB graphics)

This is a simulink model that perform Perturb and observe algorithm for maximum power point tracking.

编程实现了F-K变换，可以用于地震数据二维视速度滤波(Programming the FK transform two-dimensional seismic data can be used to filter the apparent velocity)