focal-length

Programmable.Logic.Controllers.4th.Edition，W. Bolton的，找了好久才找到的，pdf。(Programmable.Logic.Controllers.4th.Edition，W. Bolton，pdf。)

主成分回归在matlab上的实现，有详细介绍，简单易懂。(Principal Component Regression in matlab implementation are detailed, easy to understand.)

一篇关于高精度的，对声源定位的的方法介绍(_A High-Accuracy, Low-Latency Technique for Talker Localization in Reverberant Environments Using Microphone Arrays----SRP-PHAT)

cholesky decomposition - matrix / vector linear system problem solving a code

说明：  潮流计算，使用PQ分解法，是一种比牛顿法更优越的潮流计算法，收敛速度更快，收敛精度与牛顿法相同(power flow of P-Q)

运用FDTD算法计算了喇叭天线的近场分布，有一定的参考价值。(Use the FDTD algorithm to calculate the the horn antenna near-field distribution, there is a certain reference value.)

The composition of functions using neural networks. The functions which will be plot: - u(x) - σ(x) - f(x)=σ(u(x))

针对机械行业变转速零件如轴承，齿轮箱的故障诊断，采用阶次分析技术。程序针对变转速工况下的故障诊断。(Variable speed machinery industry parts such as bearings, gearboxes for fault diagnosis using order analysis techniques. Procedures for troubleshooting variable speed conditions.)

本源码是基于多尺度的retinex理论的实现代码，针对灰度和彩色图像均可使用！！ (The source is based on the theory of multi-scale retinex implementation code for gray and color images can be used! !)

Generate an hexagonal network with a free space pathloss model