用python爬虫抓站的一些技巧总结

讲述的是海面的各种散射情况的文章，包括经向散射，曼散射等(About the various scattering off the article, including by the scattering, scattering, etc. Man)

calculate the result, more execises and more experience.

高速切削加工技术是一种先进的制造技术，具有强大的生命力和广阔的应 用前景，已成为切削加工的主流。数控插补技术是数控系统实现轨迹运动控制 的基础，插补运算是CNC系统软件实现运动控制的核心模块，插补算法的优劣 将直接影响到CNC系统的性能。因此，实现一种高精度和高速度的插补方法是 插补的关键所在。 本文在分析传统基准脉冲插补、数据采样插补的算法的基础上，着重研究 了三次NURBS曲线实时插补技术，针对部分算法的不完整或效率低，提出了 一种简单快捷的插补算法。采用NURBS曲线的矩阵表达式，将整个插补过程 分解为插补预处理和实时插补。在插补预处理中完成了大量的计算，预处理的 计算结果直接应用于实时插补，使插补算法满足了NURBS曲线插补的实时性 要求，再辅以必要的轮廓误差控制，实现了加工速度自适应于加工路径的 NURBS曲线直接插补。 本文讨论的插补算法采用C++语言实现，并在VC++6.0的编程环境中实现 了插补算法的计算机仿真，验证了算法的正确性和可行性。(The high speed cutting is one of advanced manufacture technique,which has the powerful vitality and the broad application,and already became the mainstream of machining.The interpolation technology of NC is the foundation of path s control in the CNC system,and the interpolation operation is the core module of CNC system software,which comes the motion control true.The interpolation algorithm,whose function is good or bad,directly influences the performance of CNC system.So,a kind of interpolation method with the high accuracy and high speed is the key of interpolation. Based on analyzing the traditional pulse interpolation and data sampling interpolation,this paper emphasizes on the NURBS curve real-time interpolation technology.In view of the partial algorithms which is incomplete and the low efficiency,this paper propose a simple and quick interpolation algorithm.Using the matrix representation of NURBS curve,the whole interpolation process is divided into appropriate pretreat)

第一讲 CST微波工作室的简单使用和操作训练(The first lecture CST Microwave Studio simple use and operation training)

PPT for business office, simple style, suitable for many occasions

MIT公开课程计算机体系结构 第四课MIT公开课程计算机体系结构 第四课(MIT公开课程计算机体系结构 第四课)

关于计算机维修的心得，写上来看，不容易啊。对维修很有指导作用(maintenance on the computer experience, to write, Burongyia. Useful guide to the maintenance role)

手机的防静电设计，普通芯片的内部防静电只有2000V，如果得到更高的防静电效果，8000V，15000Ｖ等。(Cell phone anti-static design, the general chip' s internal anti-static only 2000V, if the effect of higher anti-static, 8000V, 15000V, etc..)

从百度上下载音乐的脚本,需要用到python2.x的库。(download music from music.baidu.com)

说明：  arm architecture document. nice book. welcome to download