AN EXPERT CONTROL SYSTEM FORPURIFICATION PROCESS

ＡＮＥＸＰＥＲＴＣＯＮＴＲＯＬＳＹＳＴＥＭＦＯＲＰＵＲＩＦＩＣＡＴＩＯＮＰＲＯＣＥＳＳＷｕＭｉｎ，ＧｕｉＷｅｉｈｕａ，ＸｉｅＹｏｎｇｆａｎｇ，ＳｈｅｎＤｅｙａｏ，ＣａｉＺｉｘｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｕｔｏｍａｔｉｃＣｏｎｔｒｏｌＥｎｇｉｎｅ...     

Decision tree method applied to computerized prediction of ternary intermetallic compounds

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｅｒｎａｒｙｉｎｔｅｒｍｅｔａｌｌｉｃｃｏｍｐｏｕｎｄｓａｒｅｃｏｍｍｏｎａｌ ｌｏｙｐｈａｓｅｓｉｎｍａｎｙａｌｌｏｙｓｏｆｎｏｎｆｅｒｒｏｕｓｍｅｔａｌｓ .ＳｏｍｅｔｅｒｎａｒｙｉｎｔｅｒｍｅｔａｌｌｉｃｃｏｍｐｏｕｎｄｓｓｕｃｈａｓＢＦｅ14 Ｎｄ2ｈａｖｅｂｅｅｎｆｏｕｎｄｔｏｂｅｖｅｒｙｕｓｅｆｕｌｆｕｎｃｔｉｏｎａｌｍａｔｅｒｉ ａｌｓ[1,2 ] .Ｈｅｎｃｅｔｈｅｐｒｅｄｉｃｔｉｏｎａｎｄｅｘｐｌｏｒａｔｉｏｎｏｆｎｅｗｔｅｒｎａｒｙｉｎｔｅｒｍｅｔａｌｌｉｃｃｏ…     

Using solidification parameters to predict porosity distributions in alloy castings

Quality criteria used in the computer-aided design and analysis of casting processes typically relate geometric, thermal, or solidification parameters to structural features such as centerline shrinkage and microporosity. Quality criteria for the prediction of porosity in castings have been used successfully in steel, but the application of criteria functions to nonferrous alloys has been less successful. Recent work suggests that the dominating mechanism that determines the amount and distribution of porosity in castings is strongly dependent on the solidification mode of the alloy and the solidification conditions. Accordingly, casting processes and alloy types are divided into four groups, and a different set of criteria functions are obtained for each group.     

Expert fault diagnosis system for leaching process in zinc hydrometallurgy

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｔｈｒｅｅｂａｓｉｃ ｐｒｏｃｅｓｓｅｓｉｎｚｉｎｃｈｙｄｒｏｍｅｔａｌ ｌｕｒｇｙａｒｅｌｅａｃｈｉｎｇ ,ｐｕｒｉｆｉｃａｔｉｏｎａｎｄｅｌｅｃｔｒｏｌｙｓｉｓ[1,2 ].Ｌｅａｃｈｉｎｇｉｓｔｈｅｆｉｒｓｔｐｒｏｃｅｓｓ,ｗｈｉｃｈｉｎｖｏｌｖｅｓｔｈｅｃｏｍ ｐｌｅｘｃｈｅｍｉｃａｌｒｅａｃｔｉｏｎｓｆｏｒｄｉｓｓｏｌｖｉｎｇｚｉｎｃ ｂｅａｒｉｎｇｍａ ｔｅｒｉａｌｉｎｄｉｌｕｔｅｓｕｌｆｕｒｉｃａｃｉｄｔｏｆｏｒｍａｎｅｕｔｒａｌｚｉｎｃｓｕｌ ｆａｔｅｓｏｌｕｔ…     

Magnetic force improvement and parameter optimization for magnetic abrasive polishing of AZ31 magnesium alloy

The magnetic force acting on workpiece to be machined plays a significantly important role in magnetic abrasive polishing process.But in a case of polishing nonferrous materials,the strength of magnetic force is very low and it leads lower polishing efficiency.The magnesium alloy that has superior mechanical properties for industrial application such as a lightweight and high specific strength is one of the most famous nonferrous materials.An improving strategy of the magnetic force for the AZ31 magnesiu...     

Development of an expert system for hot die forging by breakdown of the parts into groups

In recent years expert systems have been used more widely in industry, their efficiency increasing when they started to be used for automated technology design, rather then just being consulted by design engineers.

In this paper, an expert system concerned with the automated design of hot die forging technology is discussed. The elements of the knowledge base are analysed and the particular-general approach combined with break-up of the parts into groups is chosen as most suitable. Further, an ESI-P expert system based on the latter approach is described. Future prospects are discussed briefly.     

Advanced materials technologies of interest to the process industries

Interdependence between materials technologies and process industries is a common feature. Significant advances in science and technology are continually leading to the conception and design of new materials. An overview of some specialty materials (ceramics, polymers and composites) is provided. A summary of advances made in the metals industries (chemistry change, processing, fabrication, powder metallurgy and surfacing/coating) is presented. Multitude of innovative approaches to high performance alloys are illustrated by examples of an advanced corrosion-resistant alloy, a cobalt-free, heat-resistant alloy and a family of new wear-resistant stainless steels. Also, advances in information technology and materials expert systems are briefly outlined.     

抗断裂的材料设计

本文分两部分。第一部分是“从失效到设计”，从方法论角度论述三个概念－失效、性能、结构；三者之间的关系，以及分析它们的方法。第二部分讨论抗三类断裂的材料设计的方法：（１）蠕变断裂－系统地开发新型合金系统；依据实验数据建立供设计使用的结构、性能和它们之间关系的表象方程。（２）沿晶断裂－用归纳法建立晶界杂质浓度与固溶质之间的表象方程；用准化学理论演绎晶界杂质对沿晶断裂功的影响；建立专家系统；（３）环境断     

有色金属板材若干温热加工成形技术的发展

介绍了有色金属材料加工先进新技术国内外发展和应用概况,包括近年来关于镁合金、钛合金、铝合金等典型有色金属材料领域出现的先进塑性成形技术,尤其温热加工成形技术。在镁合金板材冲压成形领域,介绍了镁合金板材温热冲压成形、差温冲压成形、温热液压成形和热冲锻成形以及镁合金型材温热拉弯成形等新工艺技术,为镁合金板材在汽车、电子、机车车辆等领域的应用奠定了技术基础。钛合金板材零件的热应力成形、热胀形成形、激光弯曲成形、高温蠕变成形技术都得到了发展和应用。随着铝合金的进一步应用和发展,一些低塑性难成形高强铝合金的用量在增加,应用领域在扩展。因此铝合金的温热液压成形、冲锻成形都有所发展。     

有色合金铸造的现状及我国加入WTO的对策

用大量的事实说明了国外和我国有色合金铸造业迅速发展的状况,指出了我国有色合金铸造业与国外的差距, 提出了我国加入WTO后有色合金铸造业应采取的对策。     

我国铸造有色合金及其特种铸造技术发展现状

结合我国在铸造有色合金领域的发展概况,从合金发展、应用和有色合金熔体技术以及特种铸造在有色合金中的应用角度,分析了五十年来我国在该领域所取得的成绩和存在的问题,以引起广大科技工作者和生产技术人员对这方面自主创新的重视,不断提高铸造有色合金的技术水平,扩大其应用领域。     

铝合金钎焊工艺专家系统研究

将数据库和计算机程序设计引入焊接专家系统,运用人工神经网络理论实现铝合金钎焊工艺优化设计,研究出NNM算法,并以VB.NET为开发工具、SQL Server 2000为数据库管理系统,设计并开发了铝合金钎焊工艺专家系统.     

Expert parts assignment in cellular manufacturing using pattern recognition

This paper presents a new tool for on-going decision making needed to assign parts to flexible manufacturing cells, in support of the dynamic dispatching and scheduling required for day-to-day operation. A CAM-oriented modelling system and associated expert modules: Analyzer, Synthesizer and Recognizer have been developed to perform the automatic and dynamic assignment of parts to manufacturing cells directly from a feature-based CAD modelling system. It is based upon knowledge of both the part design features and manufacturing processes. Feature-based representation of components structure and related machining operations is presented. The proposed technique represents a new and generic methodology for integrating CAD and CAM. Artificial intelligence techniques such as expert systems, pattern recognition and finite-state automata are applied in this research. Symbolic strings containing the design and machining attributes of components are analyzed using knowledge of rules and syntactic pattern recognition techniques, then cell inference and part assignment are carried out using domain specific expert rules. Two case studies are included to illustrate the feasibility of these approaches for rotational and prismatic parts. It is believed that this research provides some useful contributions for both CAD and CAM integration as well as parts assignment techniques for cellular manufacturing.     

Skeletal tool of mineral processing expert system

1　ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｔｒａｄｉｔｉｏｎａｌｒｅｓｅａｒｃｈｏｎｍｉｎｅｒａｌｐｒｏｃｅｓｓｉｎｇ ,ｗｈｉｃｈｉｎｃｌｕｄｅｓｏｒｅｂｅｎｅｆｉｃｉａｂｉｌｉｔｙ ,ｍｉｌｌｄｅｓｉｇｎ ,ｄｅｖｉｃｅｍａｉｎｔｅｎａｎｃｅ,ｐｒｏｃｅｓｓｃｏｎｔｒｏｌａｎｄｐｒｏｄｕｃｔｉｏｎｍａｎａｇｅ ｍｅｎｔｄｅｃｉｓｉｏｎ ,ｉｓａｂａｓｉｃａｎｄｎｅｃｅｓｓａｒｙｗｏｒｋｉｎｍｉｎ ｅｒａｌｉｎｄｕｓｔｒｉｅｓ .Ｉｔｉｓａｌｓｏａｍｉｓｃｅｌｌａｎｅｏｕｓｗｏｒｋｔｈａｔｃｏｎｓｕｍｅｓａｌｏｔｏ…     

ASPRES—AN EXPERT SYSTEM FOR ALLOY STEEL DEVELOPMENT

将模式识别方法与专家系统技术相结合,建立了小型专家系统ASPRES,用于合金钢研制过程中配方和工艺条件的优化。已在耐深冲钢和耐低温钢研制方面实际应用。     

辅助合金钢研制的专家系统—ASPRES

将模式识别方法与专家系统技术相结合,建立了小型专家系统ASPRES,用于合金钢研制过程中配方和工艺条件的优化。已在耐深冲钢和耐低温钢研制方面实际应用。     

AN EXPERT SYSTEM FOR COMPUTER AIDED ALLOY STEEL DESIGN—ASPRES

An alloy steel pattern recognition expert system,ASPRES,has been established for thepurpose of computer aided optimal design of alloy steel in compositions and process pa-rameters,Pattern recognition techniques are used to abstract inner relationship betweenmechanical properties and process variables.The ASPRES uses 2-dimensional graph asvisual knowledge to represent domain expertise of specific object.Forward and back-ward chaining can be utilized by researcher in predicting sample performances or givinghelpful suggestions about the chemical compositions and process parameters accordingto desired properties.     

有色合金铸造的现状及我国加入WTO的对策

详细介绍了国内外有色合金铸造业迅速发展的状况，指出了我国与国外先进国家所存在的差距，找出了原因，提出解决办法，分析了我国加入WTO后，有色合金铸造业所面临的机遇和挑战的严峻形势，论述了应对这一严峻形势的对策。     

硬质合金异质焊接工艺专家系统

随着高端硬质合金焊接产品应用的日益广泛,将焊接工艺专家系统引入高端硬质合金焊接产品生产线意义重大。利用VC语言和Access数据库开发平台和前馈神经网络,开发了高端硬质合金焊接产品的焊接工艺专家系统,实现了企业局域网内的焊接数据动态更新,便于专家系统的完善与扩充,更加有利于知识库的规范管理。测试表明,该系统设计规范,能较好地满足焊接工艺设计的实际需要。     

Current Situation and Prospect of Computationally Assisted Design in High-Performance Additive Manufactured Aluminum Alloys: A ReviewEI北大核心CSCD

增材制造技术为高强铝合金复杂零部件的制造带来了前所未有的机遇,但目前增材制造铝合金体系仍局限于可铸造和可焊接的Al-Si系合金,制约了高性能增材制造铝合金的快速发展。近年来,不同尺度的计算方法逐步用于辅助高性能增材制造铝合金的开发。本文详细综述了国内外学者在计算辅助增材制造铝合金设计与制备领域的研究成果,列举了原子、介观和宏观尺度计算模拟及机器学习等计算方法辅助增材制造铝合金设计的代表性案例,分析了不同计算方法辅助合金设计的策略,并指出其不足。最后,针对如何推动多尺度计算在高性能增材制造铝合金开发中的应用进行了展望,并指出其发展方向。