基于特征建模的CAD/CNC集成化研究

探讨产品特征语义关系、特征建模过程,提出统一管理产品信息的组织结构。研究在AutoCAD的几何造型环境下,实现产品特征建模和CAD/CNC无缝集成的技术与方法。     

微机自动检测系统及技术研究

】提出了微机自动检测的概念,详细地论述了微机自动检测系统的典型结构、各部分的功能和作用,以及系统软件的结构和设计方法。提出了微机自动检测系统设计所涉及的核心技术和相关技术,对微机自动检测系统的设计和应用具有重要意义。     

OUT OF PILE CORROSION RESISTANCE OF NEW ZIRCONIUM ALLOYS IN 500 ℃/10 3MPa STEAM

１．ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｈｉｇｈｂｕｒｎｕｐｆｕｅｌａｓｓｅｍｂｌｙｄｅｓｉｇｎｅｄｆｏｒＬＷＲ,ｅｓｐｅｃｉａｌｌｙｆｏｒＰＷＲｎｅｃｅｓｓｉｔａｔｅｓｔｈｅｃｌａｄｄｉｎｇｍａｔｅｒｉａｌｓＺｉｒｃｏｎｉｕｍａｌｌｏｙｓｔｏｈａｖｅｂｅｔｔｅｒｃｏｒｒｏｓｉｏｎｒｅｓｉｓｔａｎｃｅ,ｔｈｉｓｎｅｅｄｈａｓｂｅｅｎａｄｄｒｅｓｓｅｄｂｙｔｗｏｐａｒａｌｌｅｌａｐｐｒｏａｃｈｅｓ：ｉｍｐｒｏｖｅｍｅｎｔｓｔｏｃｏｎｖｅｎｔｉｏｎａｌＺｉｒｃａｌｏｙ４ａｎｄｔｈｅｄｅｖｅｌｏｐｍｅｎ…     

DN—3×100摩托车轮圈专用三点焊机控制系统的研制

介绍了ＤＮ－３×１００摩托车轮圈专用点焊机控制系统的组成结构及原理,并对其中单元通信、调速系统、高速计数、开关复用等关键技术进行了分析,扼要说明了其设计思路及实现方法。     

电子计算机在生产计划管理中的应用

通过简介电子计算机在成焊所生产计划管理中的应用情况,从企业管理的一个方面阐述了电子计算机在企业管理中的重要性和必要性。     

水性聚氨酯-SiO2/TiO2复合涂料的制备与研究

本文采用溶胶-凝胶法,用钛酸四丁酯与正硅酸乙酯制备了纳米级SiO2／TiO2复合微粒,将其分散在聚醚型水性聚氨酯中,制备了新型水性聚氨酯-SiO2／TiO2复合涂料。傅立叶变换红外光谱及透射电镜测试表明纳米TiO2颗粒表面成功地包覆上SiO2,在聚氨酯乳液中复合微粒粒径为60nm左右;分光光度法测试表明TiO2质量分数为20％的复合微粒在聚氨酯水乳液中具有良好的分散性能,而加入质量分数为1％的十二烷基磺酸钠后,对SiO2／TiO2纳米粉末的分散性能改善最大;力学性能测试表明加入SiO2／TiO2纳米复合微粒能有效提高水性聚氨酯的力学性能,当复合微粒质量分数为0.6％时,其力学性能达到最佳。     

RESEARCH ON SYSTEM DYNAMICS MODEL OF CONVEYANCE CAPACITY IN SYMMETRIC COMPOUND CHANNELS

Stage-discharge curves are particularly important in river basin management. For a compound channel, the stage-discharge curve is often difficult to be extrapolated to yield estimates of level for a given frequency of flow. By analyzing a large number of experimental data from Science and Engineering Research Council Flood Channel Facility (SERCFCF) and applying system dynamics method, the authors established system dynamics model of conveyance capacity when rivers flow in an overbank mode, spilling onto the adjoining flood plain. The model was applied to a compound channel. And the corresponding simulated results are shown to attain high accurcy.     

System Design of a Reference Model Adaptive Control for Radial Plasma Position on HL-2A Tokamak

The design of the control system for radial plasma position on HL-2A based on model reference adaptive control (MRAC) principle is presented in this paper. The simulated results show that it can be used to improve the performance of the system greatly. Compared with the classical PID control system, it has obvious advantages in the better dynamic response, the smaller quantity of calculation and the better robustness.     

The Principle of Plasma Boundary Identification on HL-2A Tokamak

Plasma boundary identification is a basic task for studies on equilibrium and confinement in a divertor tokamak. With the progress on the experiments after engineering experiments, the boundary identification becomes an important issue for HL-2A. In order to satisfy the requirements of preciseness, simplified measurements and quickness, the filament current method instead of solving the equilibrium equations is used to identify plasma boundary on HL-2A. The involved principle, mathematics and the progresses, which have been made with this method, are given.     

The Singular Value Decomposition as a Tool of Investigating Central MHD Instabilities in the HL-1M Tokamak

A variety of strong MHD instabilities are always resulted from MHD activity of Tokamak plasmas. Central MHD instabilities can be observed with pinhole cameras to record soft x-ray (SXR) emission from the plasma along many chords with a high temporal resolution. The investigation of MHD instabilities often necessitates an analysis on spatial-temporal signals. The method of Singular Value Decomposition (SVD) can split such signals into orthogonal spatial and temporal vectors, By this means, the repetition time and the characteristic radius of various MHD phenomena such as sawteeth and snake-like perturbation can be obtained. Moreover, the (1,1) MHD mode is analyzed in great detail by SVD and used to determine the radius of the q = 1 surface.