null class是什么意思

网络释义

用法例句

Numerical simulation on cross wedge rolling of shaft parts with eccentric section;

偏心圆截面轴类零件的楔横轧成形数值模拟

Research on shaft parts straightening technology general predictive multi-steps algorithm;

轴类零件校直工艺广义预测多步算法研究

The Parametrization Design for the Shaft Parts with Auto CAD;

基于AutoCAD的轴类零件参数化设计

The key problems and its research development trends of shaft parts' automatic cold straightening technology theory;

轴类零件自动校直技术现状及发展趋势

Proposes a new method based on searching minimum anti-clockwise angle to identify outline of shaft part drawings.

提出了识别轴类零件外轮廓的逆时钟最小夹角法,讨论了五种特殊角度计算及多对象相切情况的处理方法,确定了轮廓点的搜索原则和中心线的处理方法。

The paper develops the computer aided drawing systems on shaft parts based on AutoCAD2004 by using second development systems and their pull-down menu and VLISP language.

介绍在AutoCAD2004平台上,利用二次开发系统及其下拉菜单、VLISP语言等控制模块程序而开发轴类零件图绘制系统。

The Development of CAD System of Axis Parts;

轴类零件的计算机辅助设计系统开发

Following a brief review on the advance of national and international inspection technique,the idea of obtaining axis parts inspection information using chargecoupled devices (CCD) was put forward in this paper.

总结了国内外检测技术的发展及研究现状,提出了以CCD摄像方式来获取轴类零件检测信息的方法。

This paper is introduced feature information model of axis parts.

针对小批量、多品种生产中存在的样本数据量小,难以推广统计质量控制的缺陷,在分析轴类零件的特征信息模型基础上,应用相似系统理论,确定了轴类零件车削加工的相似性,检测出相似工序零件的质量特征数据;利用公差系数法,将质量特征数据转化为在区间(0,1)内的统计量,这样扩大了其样本容量,使统计质量控制技术能方便的运用在车削加工中。

The paper describes a kind of on-line internal diameter measuring instrument applied to sleeve parts on full-automatic production line.

介绍了一种适用于套类零件全自动生产线在线内径测量仪器。

The principles and the laws of the heat treatment deformation of sleeve parts are discussed in this paper.

分析了套类零件的热处理变形机理及变形规律,结合套类零件的设计过程和热处理工艺,进行了深入地研究,从中制定出合理的热处理工艺,对套类零件的热处理变形进行有效地控制。

, presents the technical matters of boring sleeve parts and their measures.

套类零件是车削加工的重要内容之一,特别是深孔零件和薄壁孔零件在加工过程中的技术要求较高;通过尺寸误差、形位误差、表面粗糙度误差等方面,分析了套类零件在车床镗削加工过程中的技术问题及解决方法。

Research of Plate-part Drilling Model Based on Mechanism Using Similarity of V-shape Fixture;

基于类V形定位机构的盘类零件的快速钻模研究

Research on the Straightness Detection of Axis Parts with Image Measurement;

轴类零件直线度误差的图像测量研究

The Rearch of Feature Modeling Technique about Shaft Parts Based on UG;

基于UG的轴类零件特征建模方法研究

The Development of Temperature Measuring System of Large-Scale Shaft Parts;

大尺寸轴类零件温度检测系统的研制

The Computer aided Qucikly Drawing Shaft Parts on AutoCAD;

在AutoCAD上快速绘制轴类零件图

Developing CAD of Shaft Parts by VB.NET;

用VBNET开发轴类零件的CAD系统

Research on information input method of shaft parts for CAPP system

CAPP系统轴类零件信息输入方法的研究

Inquiry on Axle Spares Design Assisted by Computer

用计算机进行轴类零件优化设计的探讨

The Control System Design of the Special Numerical Control Machine Which Machines the Center Hole of Axis Parts;

轴类零件中心孔加工专用机床控制系统设计

Evaluation for Surface Roughness of Shafts Based on Fractal Geometry;

基于分形几何的轴类零件表面粗糙度检测

The Study of Measuring the Dimension of Shaft-type Elements by the Machine Vision;

基于机器视觉技术测量轴类零件尺寸的研究

Design of the Shaft Category Craftwork Which Based on RBR and CBR;

基于实例与规则混合推理的轴类零件工艺设计

The Computer Aided Design System of Strength Calibration for Shaft Parts of Pump;

泵轴类零件强度校核的计算机辅助系统SPCAD

Analysis and Error Compensation of the Intelligent Instrument Used for Measurement of Large Size Shaft Parts;

大尺寸轴类零件智能量仪系统分析与误差补偿

The Study and Explore of the CAPP System of Shaft Part Based on Feature;

基于特征的轴类零件CAPP系统的研究与探索

Study of Computer Aided Shafting Design System Based on Knowledge;

基于知识的轴类零件CAD系统的研究与实现

Research on Shaftkind Straightening System Based on Artificial Neural Network;

基于人工神经网络的轴类零件校直系统的研究

The Research and Development of Shaft Design System Based on Knowledge;

基于知识的轴类零件设计系统的研究与开发

Research on Method of Shape Error Separation and Evaluation for Large-scale Cylinder;

大型轴类零件形状误差分离与评定方法研究