小型水产冷库设计探讨

我校的食品冷库研究设计室自1981年以来,结合教学,先后设计了近20座各种类型的小冷库,其中90％的冷库已投产使用。下面就我们在小型水产冷库设计时注意、考虑的几个问题,介绍如下: 一、认真研究冷库设计方案,选择最佳的总平面布置冷库的总平面布置,直接关系到冷库建设投资、经济效果和使用的方便。由于我国各地区的地理环境、自然条件、经济条件、材     

智能化绘图在冷库设计专家系统中的应用

冷库设计专家系统是一套集人工智能技术及专家系统原理于一体的冷库设计软件。笔者将主要介绍智能化绘图部分，包括库房平面布置、机房平面布置及施工图绘制在本专家系统中的应用。     

小型冷库制冷系统稳态仿真

对小型冷库制冷系统进行了稳态仿真.建立了压缩机稳态仿真模型,重点考虑了压缩机输运环节的计算.建立了热力膨胀阀模型,重点建立了流量与阀前后压差及制冷剂进出口干度的关系.实验表明,模型精度达到工程实用要求;结合实验和仿真分析,对小型冷库的运行和设计提出了建设性意见.     

生物制品冷库的设计

本文介绍了生物制品冷库的特点和常规的工艺设计方案，并结合实际给出了一套生物制品冷库的简易热工计算方法，为迅速、准确地设计提供了必要的资料。     

在大型冷库设计与施工实践中一些值得探讨的新问题

今年，我公司承接不少大型冷库项目的设计与施工，在这些众多项目中分别依照冷库技术难度；高速建万吨库；国内出口水产加工企业大型制冷工程分别以难、快、火三个施工实例，将所遇到的一些值得探讨的新问题供同行共磋商。[第一段]     

果蔬气调冷库设计探讨

本文系统地介绍了烟台冰轮有限公司近年来在陕西和山东等地设计建造果蔬气的经验。     

An expert system for preliminary numerical design modelling

This paper is based upon the premise that computers can do more than just ‘number crunching’ to assist a designer in his task. Key features of the design process where traditional computer-aided design (CAD) approaches have had limited success are presented. The approach of expert systems, which shows promise of assisting in these features, is outlined and a system based on this approach, DESIGNER, described. This system can be applied to any numerical design problem and is illustrated through an example from preliminary ship design.     

FMS Designer: An expert system for flexible manufacturing system design

Implementation of flexible manufacturing technology in the batch manufacturing environment has created major problems for designers and engineers who are responsible for specification and design of flexible manufacturing systems (FMS). The FMS design task appears to be an excellent application for expert systems techniques. This paper describes current results of an ongoing research effort to develop an expert system which analyses the output from an FMS simulation model, determines whether operational and financial objectives are met, identifies design deficiencies or opportunities for improvement, and proposes designs which overcome deficiencies or exploit improvement opportunities. An overview of the FMS design expert system is given and a case study is presented to illustrate how the system operates. Areas for future research are also discussed.     

An expert system for the design and analysis of composite structures

A prototype expert system is described for concurrent design and analysis of composite structures. This system integrates symbolic, numerical and knowledge-based tools in an object-oriented programming environment for design synthesis, evaluation and modification. The system determines structural behavior utilizing a combination of analytical and numerical tools. Design modifications and structural optimization are performed using heuristic and experientially derived knowledge bases. The different domain-specific programs and commercial packages utilized by the system are integrated using a generic interfacing mechanism. The utility of the system is demonstrated by means of a design case study for a typical aircraft or rotorcraft structural component.     

An expert system based approach to manufacturing cell design

The design of cellular systems is a complex, multi-criteria and multi-step process which can have significant implications for the entire organization. Most research in this area focuses on the formation of pan families and associated machine groups, one step in the cell design process. Numerous quantitative techniques have been developed to address this part-family/machine group formation problem. Existing approaches include math programming, algorithms for matrix diagonalization, the application of network modelling and the use of similarity coefficients. These mathematically-oriented techniques can handle a relatively limited set of quantitative objectives and. in addition, require many simplifying assumptions. For this reason, the solutions generated by these techniques are of limited usefulness in actual cell design. This paper proposes an expert system approach to cell system design. The starting point for the expert system is the initial solution generated by traditional mathematical techniques. Based on a flexible set of user-driven quantitative and qualitative factors, the expert system evaluates these preliminary solutions for feasibility and quality. If the solutions are not satisfactory (infeasible or of low quality), the system suggests modifications.     

An expert system for the design and selection of ball bearing parameters

Artificial Intelligence (AI) is an emerging technology. Research in Al is focused on developing computational approaches to intelligent behaviour.The computer programs with which AI could be associated are primarily processes associated with complexity, ambiguity, indecisiveness, and uncertainty. One of these computer programs is referred to as Knowledge-based Expert System (KBES) as it represents knowledge acquired from various experts in a particular field of interest to the user. The expert system emulates human behaviour in solving problems thought to require experts for their solution by utilizing computer programs that incorporate experts' heuristic reasoning. In this paper, the application of KBES to aid the design of ball and roller bearing is discussed. The precision rolling-element bearing of the twentieth century is a product of exacting technology and sophisticated science. A bearing supports radial and axial loads, at the same time allowing relative motion between two elements of a machine. Various requirements and steps in the design of ball and roller bearings are discussed. Equations are developed for the relevant design parameters and input into the expert system shell called VP-Expert. The expert system rules are also provided.     

产品设计专家系统研究

介绍了产品设计的目的和任务,信息时代的产品设计发展状况及存在的问题,讨论了将人工智能理论与专家系统技术应用于产品设计领域,提出一个产品设计专家系统的框架结构.利用智能代理技术实现了信息与资料的整理,依据形态分析法实现了辅助创新设计,并提出采用数学建模法进行产品方案的评定.     

An expert system for network management control

Abstract

Due to the varying time and the complexity of the commercial telecommunication network configuration, routing of the communication traffic becomes very important for telecommunication systems. No one can keep in mind all the complex routing plans used in networks, so it is hard to quickly take proper actions while the switching node is being blocked.

In this paper, we propose an expert system which can collect traffic data, monitor network status, reason and take appropriate actions for extreme traffic congestion on a network just as a network management expert can do. It would certainly streamline the whole network control procedure, and. provide dynamic routing functions based on the original static routing method adopted in Taiwan. It does improve both network efficiency and network reliability.     

An expert system for hydrocarbon pyrolysis reactions

The behaviour of complex chemical reactions such as the cracking of hydrocarbons may be represented by a set of differential equations each of which corresponds to a mass balance over a single elementary species, reactant or product. The simulation of the overall reaction is achieved by numerical integration of this set of equations. For reactions such as combustion and pyrolysis of organic molecules the number of elementary reactions is very large indeed and in order to produce a viable model of the reaction it is necessary to produce a subset that approximates to the behaviour of the real system.We have developed an expert system on a VAX11/780 that generates reaction mechanisms on the basis of a generator of elementary reactions that is constrained by rules relating to initial conditions and kinetic and thermodynamic data. Chemical species are represented by PROLOG lists that can be manipulated in a variety of ways in order to generate reactions such as dissociation, abstraction, combination etc. The emphasis of the system is on eliminating unproductive reactions at an early stage in order to avoid the generation of hundreds of redundant reactions.The mechanisms generated so far for small acyclic hydrocarbons compare favourably with those produced by human experts. It appears that some relatively straightforward extensions of the existing system will result in a powerful tool for the investigation of complex reactions and the evaluation of kinetic data.     

An application of an expert system in layout compaction of VLSI design

Abstract

Recent research in knowledge‐based expert systems of VLSI design tools has concentrated on placement, routing, and cell generation. This paper presents an alternative application for artificial intelligence (AI) techniques on compaction design for a VLSI mask layout‐expert compactor. In order to overcome the shortcomings of iterative search through a large problem space within a working memory, and therefore, to speed‐up the runtime of compaction, a set of rule‐based region query operations and knowledge‐based techniques for the plane sweep method are proposed in this system. Experimental results have explored the possibility of using expert system technology (EST) to automate the compaction process by “reasoning” out the layout design and applying sophisticated expert rules to its knowledge base.     

An expert system for the optimal mesh design in the hp-version of the finite element method

This paper suggests a simple expert system frame and provides the domain knowledge for the optimal mesh design and the prediction of the error in the energy norm for the problem of plane elasticity using the hp-extension in the finite element method. The expert system monitors the progress of the analysis, guides the user through the various steps and is able to reason about its own advice. In an example the user–expert communication is shown and the superiority of the results is demonstrated.