shujukuxitgainian

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)

Visual basic complete tutorial for connection to db s

说明：  广义解调时频分析方法在调制信号处理中的应用-杨宇(Generalized demodulation time-frequency analysis methods in the modulation signal processing applications- Yang)

利用ansys进行球壳的建模，可以用来模拟液体储罐的大型工业结构的分析计算(Ansys modeled using a spherical shell, can be used to simulate large-scale industrial structure analysis and calculation of liquid storage tanks.)

经典教材数据库系统概念，很多大学计算机系的研究生课程用书 (Classical concept of teaching materials database system, many university computer science graduate course books)

数控编程基础入门课件（本人非编程人员，但真心恳求得到一个下载个数）(NC Programming Courseware entry)

J1939 中英文协议 英文的很全 中文的也很详细 分享给大家(J1939 protocol in English)

ISO 22900 1-3 道路车辆通信接口模型(ISO 22900 1-3 road vehicle communication interface model)

作为学习的资料，这是我学习c语言的一些重要记录(Information for learning, this is my c language learning some of the important records)

银行核心系统入门简介 本文的目标读者是准备从事银行核心系统开发、维护的从业人员。(This article is intended for preparing to engage in core banking system development, maintenance practitioners.)