Adaptive filters play a very important role in most of today’s signal processing and control applications as most real-world signals require processing under conditions that are difficult to specify a priori. They have been successfully applied in such diverse fields as communications, control, radar, and biomedical engineering, among others. The field of classical adaptive filtering is now well established and a number of key references—a widely used one being the book Adaptive Filter Theory by Simon Haykin—provide a comprehensive treatment of the theory and applications of adaptive filtering. A number of recent developments in the field, however, have demonstrated how significant performance gains could be achieved beyond those obtained using the standard adaptive filtering approaches. To this end, those recent developments have propelled us to think in terms of a new generation of adaptive signal processing algorithms. As data now come in a multitude of forms originating from different applications and environments, we now have to account for the characteristics of real life data: † Non-Gaussianity; † Noncircularity; † Nonstationarity; and † Nonlinearity. Such data would typically exhibit a rich underlying structure and demand the development of new tools, hence, the writing of this new book.

图8.3 Rastrigin函数图形 如图 8.3 所示，Rastrigin 函数有许多局部最小值——在图上显示为“谷底（valleys）”。 然而，该函数只有一个全局最小值，出现在 x-y 平面上的点[0，0]处，正如图中竖直线指示 的那样，函数的值在那里是 0。在任何不同于[0，0]的局部最小点处，Rastrigin 函数的值均 大于 0。局部最小处距原点越远，该点处 Rastrigin 函数的值越大。 Rastrigin 函数之所以最常用来测试遗传算法，是因为它有许多局部最小点，使得用标准 全局最小点[0，0]

python_sound_open 《语音信号处理试验教程》（梁瑞宇等）的代码主要是Matlab实现的，现在Python比较热门，所以把这个项目大部分内容写成Python实现，大部分是手动写的。使用查看帮助文件： 参考

image processing toolbox, a very useful toolbox, especially feature extraction such as corner_pyramid, entropy_pyramid, orientation_pyramid.

spacy-lookup：基于字典的命名实体识别

自己根据plotclock的硬件做的随动画图机 很蠢萌 待改进

Integrated solution for seafloor mapping, processing and distribution

数字图像处理(MATLAB版)(冈萨雷斯)的图片 书之经典想不必说，需要的请下

Transformer自然语言处理，Natural Language Processing with Transformers: Building Language Applications with Hugging Face

Transformer自然语言处理，Natural Language Processing with Transformers: Building Language Applications with Hugging Face