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Python网络数据采集
python网络数据采集 高清pdf 特别推荐这本书,通俗易懂,作者讲的非常详细(Python Network Data Acquisition high-definition pdf)
- 2019-03-10 19:56:25下载
- 积分:1
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Python
PYTHON核心教程,PYTHON开发必读(PYTHON core curriculum, PYTHON development of reading)
- 2020-06-25 01:40:02下载
- 积分:1
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NURBS110707
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)
- 2011-07-07 11:46:17下载
- 积分:1
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Hp-Computing-Parallel-Computing
高性能并行计算
迟学斌 中国科学院计算机网络信息中心(High-performance parallel computing Chi Xuebin, Chinese Academy of Sciences Computer Network Information Center)
- 2013-03-13 11:07:20下载
- 积分:1
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SQL
本书对SQL技术的使用和发展进行了全面的讨论。全书共分六大部分,其中第一部分到第五部分分别介绍了SQL的历史和SQL标准的变化,如何使用SQL获取、更新数据,如何构造数据库结构以及如何实现数据的安全方案等,并描述了如何使用ANSI标准中的嵌入式SQL。(This book SQL technology use and development of a comprehensive discussion. The book is divided into six large part to the fifth part of the first part of which introduced the history and the SQL standard SQL changes, how to use SQL to obtain, update data, how to construct the database structure and how to implement data security programs, and describes the How to use the ANSI standard for embedded SQL.)
- 2010-03-04 00:11:47下载
- 积分:1
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PowerSystemStabilityAndControl
《电力系统稳定与控制》的影印版,作者是加拿大不列颠哥伦比亚省电力技术实验室公司的总裁及首席执行官Prabha Kundur( Power System Stability and Control, the author of the Canadian Columbia Electric Power Technology Laboratory Company President and Chief Executive Officer Prabha Kundur)
- 2017-03-24 10:45:31下载
- 积分:1
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LATEX-install-and-use
中文LATEX_安装与使用(优秀教程),用于latex学习应用。(Chinese LATEX_ install and use (excellent tutorial) for latex-learning applications.)
- 2014-02-19 20:06:50下载
- 积分:1
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ADS ATF54143封装工程文件
说明: 该文件为ATF53143的封装文件,喜欢的可以下载(this is a file about ATF54143 which you can load if like)
- 2020-07-02 16:00:02下载
- 积分:1
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Meldas 500
说明: handbook for users about mitsu meldas 500 cnc
- 2019-03-01 07:47:01下载
- 积分:1
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coord_conv1
Python script for convert coordinate between local end geodetic systems.
- 2016-01-15 22:35:55下载
- 积分:1