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Applying fuzzy functions and sequential coordination to optimization of machinery arrangement and pipe routing

NAVAL ENGINEERS JOURNAL 1998年第6期110卷 43-54页

作者： Wu, BC Young, GS Schmidt, W Choppella, K Dr. Bi-Chu Wu:received a PhD in Mechanical Engineering from the University of Maryland College Park in 1991. She has worked on projects involving naval architecture design optimization solid mechanics and database development. Presently a senwr engineer with Angle Incorporated Dr Wu's research interests are in design optimization and fuzzy logic applications. Dr. Gin-Shu Young: a senior engineer with Angle Incorporated holds a PhD in Mechanical Engineering from the University of Maryland College Park. As a guest researcher with National Institute of Standards and Technologies from 1990 to 1993 he worked on vision-based navigation for autonomous vehicles. His experience also includes applications of optimization fuzzy logic neural network and genetic algorithm methods to engineering system design Mr. William Schmidt:co-founded Angle Incorporated in 1990 and has served as Vice PresidentlChiefScientist during this tame. He holds a B.Sc. in Applied Science from the Naval Acadt?my and an M.Sc. in Physics from the Naval Post Graduate School. He has cner 20 years experience in technical leadership material and personnel management. He has led the application of computer aided design (CAD) and Product Model Information Exchange to the shipbuilding industry. His experience also includes leading the amlication of model based operational analysis to support the Live Fire Test Program for DDG 51 Class Destroyers. Mr. Krishna M. Choppella:is a Sofware Engineer at Eidea Laboratories Incotporated where he works on componentbased distributed enterpvise frameworks. He has been involved in creating data analysis tools for the US Nay by integrating CAD modeis databases and graphical front ends. His work in the Masters degree program in Mechanical Engineering at the University of Texas at Austin was in di0ddase.r spectroscopy of combustion products in porous-matri burners. He received his Bachelors degree in Electrical Engineering in India. He was a Research Associate at the Centre for Laser Technology and Project Engi

Ship design is often multidisciplinary involving several design elements with various types of objectives and constraints (O/C) some easily described as mathematical formulas, others better modeled as descriptive assertions. This paper describes a method based on fuzzy functions and an integrated performance index to model O/C using descriptive assertions to be used with mathematical formulas in optimization. Another issue addressed in this paper concerns the coordination of design elements when sequentially coupled, that is, when one leads the other and the performance of the follower depends greatly on the design of the leader. Based on neuro-fuzzy techniques, the method described here coordinates and optimizes sequentially coupled elements. The two methods are applied to machinery arrangement (MA) and pipe routing (PR). Preliminary models for optimization of MA and PR are described considering convenience, producibility: engine room size, interference and location as factors in the O/C set. Some test results from MA/PR applications are presented and discussed. The methods are generic and can be extended to other elements in ship design. They are mutually independent and may be used separately Two advantages of their use are an improvement in overall performance and a reduction in the need for redesign of elements.

关键词： Optimization

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A logical framework for graph theoretical decision tree learning 7th

A logical framework for graph theoretical decision tree lear...

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7th International Workshop on Inductive Logic Programming, ILP 1997

作者： Geibel, Peter Wysotzki, Fritz Methods of Artificial Intelligence Computer Science Department Technical University Berlin Sekr. Fr 5-8 Franklinstr. 28/29 BerlinD-10587 Germany

ISBN: (纸本)3540635149

We present a logical approach to graph theoretical learning that is based on using alphabetic substitutions for modelling graph morphisms. A classified graph is represented by a definite clause that possesses variables of the sort node for representing nodes and atoms for representing the edges. In contrast to the standard logical semantics, different node variables are assumed to denote different objects. The use of an alphabetical subsumption relation (α-subsumption) implies that the least generalization of clauses (α-generalization) has different properties than Plotkin's least generalization (gg). We present a method for constructing optimal α-generalizations from Plotkin's least generalization. The developed framework is used in the relational decision tree algorithm TRITOP. © Springer-Verlag Berlin Heidelberg 1997.

关键词： Decision trees

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Parallel algorithms for treewidth two 23rd

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23rd International Workshop on Graph-Theoretic Concepts in computer science WG 1997

作者： de Fluiter, Babette Bodtaender, Hans L. Centre for Quantitative Methods P.O. Box 414 Eindhoven5600 AK Netherlands Department of Computer Science Utrecht University P.O. Box 80.089 Utrecht3508 TB Netherlands

ISBN: (纸本)3540637575

In this paper we present a parallel algorithm that decides whether a graph G has treewidth at most two, and if so, constructs a tree decomposition or path decomposition of minimum width of G. The algorithm uses O(n) operations and O(log n log* n) time on an EREW PRAM, or O(log n) time on a CRCW PRAM. The algorithm makes use of the resemblance between series-parallel graphs and partial two-trees. It is a (non-trivial) extension of the parallel algorithm for series-parallel graphs that is presented in [6]. © Springer-Verlag Berlin Heidelberg 1997.

关键词： Parallel algorithms

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The limitations of decision trees and automatic learning in real world medical decision making

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Journal of Medical Systems 1997年第6期21卷 403-415页

作者： Zorman, Milan Štiglic, Milojka Molan Kokol, Peter Malčić, Ivan Faculty of Electrical Engineering and Computer Science 2000 Maribor Smetanova 17 Slovenia Maribor Teaching Hospital Department of Pediatric Surgery 2000 Maribor Ljubljanska 2 Slovenia Klinicki Bolnicki Centar Rebro Klinika za Djecje Bolesti Zagreb Kispaticeva 12 Croatia

The decision tree approach is one of the most common approaches in automatic learning and decision making. The automatic learning of decision trees and their use usually show very good results in various 'theoretical' environments. But in real life it is often impossible to find the desired number of representative training objects for various reasons. The lack of possibilities to measure attribute values, high cost and complexity of such measurements, and unavailability of all attributes at the same time are the typical representatives. For this reason we decided to use the decision trees not for their primary task-the decision making-but for outlining the most important attributes. This was possible by using a well-known property of the decision trees-their knowledge representation, which can be easily understood by humans. In a delicate field of medical decision making, we cannot allow ourselves to make any inaccurate decisions and the 'tips,' provided by the decision trees, can be of a great assistance. Our main interest was to discover a predisposition to two forms of acidosis: the metabolic acidosis and respiratory acidosis, which can both have serious effects on child's health. We decided to construct different decision trees from a set of training objects. Instead of using a test set for evaluation of a decision tree, we asked medical experts to take a closer look at the generated trees. They examined and evaluated the decision trees branch by branch. Their comments show that trees generated from the available training set mainly have surprisingly good branches, but on the other hand, for some, no medical explanation could be found.

关键词： Automatic learning Decision tree

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Intelligent support for the neuroimaging

Intelligent support for the neuroimaging

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Annual IEEE Symposium on computer-Based Medical Systems

作者： B. Novak G. Bunc Faculty of Electrical Engineering and Computer Science University of Maribor Maribor Slovenia Department of Neurosurgery Teaching Hospital of Ljubljanas Medical School Maribor Ljubljana Slovenia

Neuroimaging provides a neurosurgeon with the most important information about pathology concerning a particular patient. The amount of such information is enormous and is still growing with the introduction of new equipment. The problem is the choice of the exact details of interest from this huge amount of information, how to make it more visible, and how to store it etc. in order to enable the physician to make better and quicker decisions about exact diagnosis and localization of the pathology for further medical interventions. In such cases computer based intelligent support can help a physician to acquire more important information from X-ray images. This is very important for drawing proper conclusions and taking appropriate action. The authors are developing a prototype of a computer based intelligent support for neuroimaging (CBISN). Some practical examples are presented.

关键词： Neuroimaging Histograms Biomedical imaging Medical diagnostic imaging Pathology Neurosurgery Decision making Physics computing Prototypes Image storage

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Overview, current trends and latest results in estimating the effects of load modelling on power-system damping and stability

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EUROPEAN TRANSACTIONS ON ELECTRICAL POWER 1997年第2期7卷 107-113页

作者： Milanovic, JV [?]Jovica V. Milanovic (1967) received the Dipl.-Ing. (Elec.) and M.Sc. (Elec. Eng.) degrees from the University of Belgrade. Yugoslavia. in 1987 and I99 I respectively. One year he worked with “Energoproject-MDD”- Engineering and Contracting Co. in Belgrade as an engineer in designing power plants and substations. In late 1988 hejoined the Faculty of Electrical Engineering of the University of Belgrade first as an associate teaching assistant and then (since late 199 I) as teaching assistant at the Dept. of Power Converters and Drives. Between March 1993 and January 1996 he completed his Ph.D. at the University of Newcastle. Australia. at the Dept. of Electrical and Computer Engineering. Since February 1996 he is lecturer at the Department of Electrical Engineering and Computer Science at the University of Tasmania Austnlia. His major interests include synchronous machines and power system transients control and stability. (The University of Tasmania. Dept. of Electrical Engineering and Computer Science GPO Box 252-65 Hobart Tas 7001 Australia.Te1+61 362/262-753 Fax+61 369/262 136. e-mail: Jovica.Milanovic@eecs.utas.edu.au)

The paper presents the overview of load modelling for power-system damping and stability studies with main conclusions summarized from previous research. The attempt has been made to present a cross-section of the most exploited existing load models together with the most important conclusions drawn from their implementation in power-system stability programs. The current trends and latest results in the domain of damping of electromechanical oscillations in power systems are also presented. The effects of load dynamics on damping of electromechanical oscillations were analyzed on the basis of one of generic load models proposed in the past. The recent results further encourage investigation in this area and highlights the importance of proper load modelling.

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Influence of human engineering on manning levels and human performance on ships

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NAVAL ENGINEERS JOURNAL 1997年第5期109卷 67-76页

作者： Anderson, DE Oberman, FR Malone, TB Baker, CC David E. Anderson:has a bachelor of science degree in environmental engineering from Florida Technological University and a master's degree in environmental engineering from the University of Central Florida. He is a graduate of the Naval Sea Systems Command's Engineer-In-Training (EIT) Program. Mr. Anderson was instrumental in introducing the collective protection system (CPS) in the U.S. Navy developing the initial forward-fit package for the USS Gunston Hall and the engineering change proposal (ECP) for the USS Wasp. In 1990 he joined the Human Systems Integration (HSI) Division (SEA 55W5) where he was task leader for auxiliary ships. He is currently the HSI manager for the future technology variant of the SeaLift ship and the future carrier. Association of Scientists and Engineers 33rdAnnual Technical Symposium 26 April 1996. Fred R. Oberman:has B.A. and M.A. degrees from the University of Chicago and Loyola University (experimental psychology) and an M.S. degree in industrial engineering and operations research from Virginia Polytechnic Institute (VPI). He has more than 30 years experience in HSI management planning research analysis design and testing in government and private sector positions. He is currently responsible for NavSea HSI generic research and tool development efforts. He is responsible for Human Engineering Specifications and Standards (Commercial Hypertext) and is the NavSea 03D7 representative on HSI in Performance Specifications and for integration of HSI within Integrated Logistic Support (ILS). He has served as DoD HSI SubTAG chair and member of the Simulation and Modeling Test and Evaluation Display and Control Systems Human Computer Interaction Specifications and Standards and Systems Design Sub Tags as a member of the Society of Naval Architects and Marine Engineers (SNAME) Systems Safety Panel and a member of NATO RSG 14 on man-machine analysis. Thomas B. Malone: CHFEP received a Ph.D. in experimental psychology from Fordham University in 1964. He is president of Carlow

The objectives of Human Engineering (HE) are generally viewed as increasing human performance, reducing human error, enhancing personnel and equipment safety, and reducing training and related personnel costs. There are other benefits that are thoroughly consistent with the direction of the Navy of the future, chief among these is reduction of required numbers of personnel to operate and maintain Navy ships. The Naval Research Advisory Committee (NRAC) report on Man-Machine Technology in the Navy estimated that one of the benefits from increased application of man-machine technology to Navy ship design is personnel reduction as well as improving system availability, effectiveness, and safety The objective of this paper is to discuss aspects of the human engineering design of ships and systems that affect manning requirements, and impact human-performance and safety The paper will also discuss how the application of human engineering leads to improved performance, and crew safety, and reduced workload, all of which influence manning levels. Finally, the paper presents a discussion of tools and case studies of good human engineering design practices which reduce manning.

关键词： Human engineering

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Submarine power sources for the mission

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NAVAL ENGINEERS JOURNAL 1996年第3期108卷 129-138页

作者： Donaldson, AJ [?]A.J. Donaldson spent several years at Rolls-Royce and Associates Limited working on computer methods for reactor transient analysis before obtaining a Master of Science degree in Nuclear Technology from the Royal Naval College at Greenwich in 1984. Subsequently as a senior engineer he joined a team assessing alternative power technologies for naval space and commercial applications.

This study compares nuclear and non-nuclear submarines for various mission requirements. It includes non-nuclear AIP options: alternative fuels and oxidants, heat engines and electrochemical systems, as well as advanced rechargeable batteries. Alternative submarine power sources are summarized and the non-nuclear AIP options are compared with each other for different energy storage requirements. The AIP options most suitable for low capacities have already been demonstrated, and descriptions have been published. This is not the case for the fuel cell systems which are expected to be most compact for longer endurance AIP, and so an example is described briefly in this paper. An AIP system is outlined to meet a particular mission requirement (1000-3000nm radius to a coastal/enclosed sea patrol area). This draws on fuel cell and reformer programs at Rolls-Royce and Associates Limited. The paper concludes with a cost effectiveness assessment of alternative submarines for typical sets of mission requirements. The alternatives are compared in terms of endurance, speed, payload, signatures and relative cost. This paper does not draw on any study funded by the Ministry of Defence. All data is from open literature or is estimated on a purely comparative basis.

关键词： Submarines

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An intelligent tutoring system for malaria based on the health-2000 large-scale integrated expert system

An intelligent tutoring system for malaria based on the heal...

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13th International Congress on Medical Informatics Europe, MIE 1996

作者： Boyom, S.F. Kwankam, S.Y. Kouam, L. Asoh, D.A. Kouokam, F.G. Department of Computer Sciences Faculty of Science University of Yaounde I France Center for Health Technology School of Engineering University of Yaounde I United States University Teaching Hospital University of Yaounde I France

ISBN: (纸本)9051992785

In response to the need for converting diagnostic systems into intelligent tutoring systems, we have developed a futuristic tool to assist in the training of doctors, nurses, health technicians and pharmacists. It is part of an integrated hospital information system, christened Health-2000, which combines a system for medical diagnosis and a system for fault diagnosis among its many features. The main function of the intelligent tutoring system is to provide training in two main areas: the development and use of tutorial software aimed at improving health care, and how to combat malaria. To achieve these objectives, we build on the INFOCOR methodology and the Hypercard Guide for tutorial software development. We simulate the learning environment of the user through lessons and tests, to help build his/her capacity for medical decision making. The system also instructs medical experts on proper use of available tools in the development of tutorial software in their areas of expertise. As to the specific disease covered, malaria is an easy choice. The disease attacks more than 270 million people worldwide, and is the most widespread and most devastating of tropical diseases, causing one to two million deaths per year. © The authors 1996.

关键词： computer aided instruction

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The informed professor: Clinical instruction of breast disease diagnosis and management 3rd

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3rd International Conference on computer Aided Learning and Instruction in science and Engineering, CALISCE 1996

作者： Rahilly, Timothy J. Saroyan, Alenoush Greer, Jim Lajoie, Susanne P. Breuleux, Alain Azevedo, Roger Fleiszer, David Department of Educational and Counselling Psychology McGill University Canada Centre for University Teaching and Learning McGill University Canada Department of Computer Science University of Saskatchewan Canada McGill University Canada Montréal General Hospital Canada

ISBN: (纸本)3540614915

This paper describes a learning environment in the domain of breast disease and discusses some of the issues in designing a system cooperatively with content, pedagogical, and computer programming experts. The environment uses curricular content, presented in a non-linear fashion, from third and fourth year medical school;all aspects of the curriculum are available simultaneously to enhance the integration of declarative and procedural knowledge necessary in skilled clinical performance. The system represents an interactive, authentic environment where learners construct knowledge, develop higher order cognitive skills such as diagnosis, reasoning, and decision making, apply knowledge and skills, interact with patients, and receive appropriate feedback. The design of the learning environment is based on the theory of cognitive apprenticeship, thus the type and level of information and feedback provided by the system is dependent up on the learner's input. The system also allows learners to evaluate themselves by comparing their actions and decisions to those of experts in the field. The collaboration of experts from different disciplines in designing this environment has resulted in a greater degree of sophistication in ways in which the project has been conceptualized and reified. By focusing all experts on the learning goals of the environment and by cooperatively assisting each type of expert to extend their knowledge of the other areas, we have been able to create a system that incorporates the key theoretical principles from each area. The result is a learning environment that emphasizes meaningful learning of knowledge and skills that learners can apply when they are confronted with similar situations in the real world. © Springer-Verlag Berlin Heidelberg 1996.

关键词： Decision making

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