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Custom Integrated Circuits conference (CICC)

作者： P.J. Bricaud Mentor Graphics Corporation Sophia-Antipolis France

The never ending increase of silicon capacity available to system and IC designers, as predicted by Moore's Law, brings on a cyclical crisis in design methodology and engineering productivity generating a ripple effect through the EDA and electronics industries. The system-on-a-chip era will need more than available silicon to become a reality. A new design methodology roadmap based on IP reuse needs to emerge. Two of the EDA giants, Synopsys and Mentor Graphics, took the initiative at DAC 1997 to set the pace for the new challenge of System-on-a-Chip design. After more than a year and the publishing of the Reuse Methodology Manual (RMM) that sets the stage for IP Reuse and System-on-a-Chip design, where do we stand? The Reuse Methodology Manual is well perceived and accepted by the design community and represents a stake in the ground towards ensuring rapid creation of reusable designs. throughout this tutorial an attempt is made to describe the total SoC design now based on reusable IP and also to outline some non-trivial issues during this process: effect of available silicon capacity, SoC integration, SoC verification and documentation.

关键词： System-on-a-chip Silicon design methodology Electronic design automation and methodology Moore's Law design engineering Productivity Electronics industry Graphics Publishing

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Enterprise modeling and simulation platform integrating manufacturing system design and supply chain

Enterprise modeling and simulation platform integrating manu...

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IEEE International conference on Systems, Man and Cybernetics

作者： F. Kubota S. Sato M. Nakano Software Science Laboratory Toyota Central Research and Development Laboratories Inc. Nagakute Aichi Japan

In this paper, we propose enterprise modeling and simulation platform integrating manufacturing system design and supply chain. through the analysis of an enterprise model integrating them, we have found that an enterprise is too complicated to simulate because there are various execution frequency and many types of information flow. We have overcome the difficulty of simulating a complicated enterprise model by using the agent-oriented language, "ROPL". This platform has three features. 1) It realizes a suitable design of an enterprise model under the interaction between manufacturing system design and supply chain. 2) Users can evaluate a design result by simulating an enterprise model. 3) By adapting CORBA, it enables a communication environment, which makes this platform practical. The simulation experiments demonstrate that our developed platform can be employed in complicated enterprise simulation. This paper describes the details of new enterprise modeling and simulation methodology on this platform. After the details, we discuss applicability of simulation integration methodology through an application example.

关键词： Manufacturing systems Supply chains Enterprise resource planning Production planning process planning Analytical models Computer aided manufacturing throughput Mathematical model Mathematical programming

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A semi-formal approach to assist software design with reuse

A semi-formal approach to assist software design with reuse

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International conference on Software Maintenance (ICSM)

作者： W.C. Chu C.P. Hsu C.W. Lu Xudong He Department of Computer and Information Science Tunghai University Taiwan Department of Information Engineering Feng Chia University FCU Taiwan Department of Computer Science Florida International University USA

design with reuse has been accepted as a cost-effective way to software development. Software reuse covers the process of identification, representation, retrieval, adaptation, and integration of reusable software components. In this paper, we propose a semi-formal approach to software reuse. The approach consists of the following major steps: (1) software components are annotated with formal information, (2) the software components are then translated into predicate transition nets, and (3) consistency checking of the reusable and new components is carried out using the reachability analysis technique of predicate transition (PrT) nets. The approach is demonstrated through an example.

关键词： Software design Software reusability Software systems Software libraries Programming Specification languages Reachability analysis Application software Information science design engineering

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International space station microgravity environment design & verification

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AIP conference Proceedings 1999年第1期458卷 465-470页

作者： Steve Del Basso Analysis Integration Team Boeing North American 2100 Space Park Drive Houston Texas 77058

A broad class of scientific experiments has evolved which utilize extreme low acceleration environments. The International Space Station will provide such a “microgravity” environment, in conjunction with an unparalleled combination of quiescent period duration, payload volume and power, and manned or telescience interaction. The International Space Station is the world’s first manned space vehicle with microgravity requirements. These place limits on the acceleration levels within the pressurized laboratories and affect everything from flight altitude and attitude to the mechanical and acoustic energies emitted by an air circulation fan. To achieve such performance within the program’s resource constraints, a microgravity control approach has been adopted which balances both source and receiver disturbance mitigation. The Active Rack Isolation System (ARIS) provides acceleration attenuation at the payload rack level, and dominant sources have been reduced either by isolation or design modifications. Analytical assessments indicate that the vehicle is capable of meeting the challenging microgravity requirements, although some current marginal non-compliances do exist. Assessment refinements will continue through the verification phase with greater reliance on test and on-orbit measured data as part of a long term effort to clearly define and understand the constitution of the acceleration environment. This process will assure that the design and operation of the International Space Station will support significant microgravity science research.

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Improving the efficiency of motion planning on a polyhedron

Improving the efficiency of motion planning on a polyhedron

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International conference on Multisensor Fusion and integration for Intelligent Systems (MFI)

作者： Pi-Ying Cheng Der Chin Liu Department of Mechanical Engineering National Chiao Tung University Hsinchu Taiwan

This study presents a novel algorithm to derive an efficient motion planning on a polyhedron model. The proposed algorithm combines the computational geometry method with the numerical analysis method to obtain the bend points that pass through the shortest path. This algorithm should improve the efficiency of the motion planning process. The computational geometry method is applied to create fractional patches, to retrieve information about the patches, and to calculate the distance between two points. The numerical analysis method is applied to derive the feasible paths, and then the Djikstra method is used to identify the shortest path between specific points of the edge boundary. An illustrative example demonstrates this algorithm's feasibility and effectiveness. The purpose of this research is to simplify the process of variant motion planning, eliminate the time needed for estimating the optimal solution of the Voronoi method, and enhance the working efficiency.

关键词： Nonlinear equations Computational geometry process planning Path planning Collision avoidance Mechanical engineering Numerical analysis Information retrieval Motion estimation Algorithm design and analysis

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Beyond access: informed participation and empowerment 99

Beyond access: informed participation and empowerment

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Proceedings of the 1999 conference on Computer support for collaborative learning

作者： Ernesto G. Arias Hal Eden Gerhard Fischer Andrew Gorman Eric Scharff University of Colorado Boulder

This paper is based on the fundamental claim that one of the major roles of new media is not to deliver predigested information to individuals, but to provide the opportunity and resources for social debate and discussion. For most design problems (ranging from urban design to graphics design and software design) that we have studied over many years, the knowledge to understand, frame, and solve these problems does not exist, but is constructed and evolved during the process of solving them, exploiting the power of the "symmetry of ignorance" and "breakdowns." From this perspective, access to existing information and knowledge (often seen as the major advance of new media) is a very limiting concept. Many social and technological innovations are limited to provide primarily better access, leading to "consumer" cultures. Our approach focuses and creates support for lifelong learning activities grounded in informed participation and empowerment, allowing learners to incrementally acquire ownership in problems and contribute actively to their *** illustrate our approach, we present the Envisionment and Discovery Collaboratory (EDC), an integrated physical and computational environment supporting informed participation through new forms of knowledge creation, integration, and dissemination. The EDC empowers users to act as designers in situated learning and collaborative problem-solving activities. It addresses the integration of the userís consumer and designer roles, not by translating them into an "either-or" type of support, but rather by providing users with the flexibility to move along this spectrum according to needs, opportunities, and personal interest and engagement in particular learning situations.

关键词： shared knowledge active participation integrated physical and computational spaces participatory design CSCL in community and informal settings distributed cognition

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An integration design approach in PID controller

An integration design approach in PID controller

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Proceedings of the International conference on Intelligent processing and Manufacturing of Materials, IPMM

作者： Jen-Yang Chen Department of Electronic Engineering China Institute of Technology and Commerce Taipei Taiwan

A hybrid PID controller that combining the Ziegler-Nichols PID controller with the grey prediction PID controller is proposed. The fuzzy gain scheduler is constructed to integrate these two controllers. Different characteristics of the employed controllers have been appropriately acquired. The advantage of the proposed control architecture is that the parameters of PID controllers do not need to adapt. Furthermore, the design scheme provides an easy way to design the PID controller. The goal of the first Ziegler-Nichols PID controller is designed with fast response. Usually, it can be obtained after using the Ziegler-Nichols tuning algorithms. The second grey prediction PID controller is operated in slow response. It can be easily achieved through scheduling the system output. The fuzzy gain scheduling has been successfully applied to emulating these two controllers. Simulation results exhibit the superiority of the proposed method over the conventional ones.

关键词： Three-term control Control systems Job shop scheduling Fuzzy control Pi control Proportional control Performance gain Electrical equipment industry process control Fuzzy set theory

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Teaching undergraduates fundamental engineering management concepts

Teaching undergraduates fundamental engineering management c...

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Portland International conference on Management of Engineering and Technology (PICMET)

作者： J.R. Goulding Program Systems Integrator Electroglas Inc. Santa Clara CA USA

Summary form only given. Developing products that require a high degree of cross-functional integration (mechanical-electrical-software) places new demands upon undergraduate education. New hires or junior engineers must be capable of functioning in and contributing to a team-oriented environment. This paper discusses the results of teaching fundamental engineering management concepts, such as market-driven product requirements, concurrent and simultaneous engineering, GANTT and CPM scheduling, decision making, and uncertainty and risk analysis, to undergraduate mechanical and electrical engineering students. Portland State University's School of Engineering expanded the senior capstone course, called design Methods, for mechanical engineering students to include the instruction of fundamental engineering management concepts. The main objective of the course is to introduce the design process and give the students practical experience as exemplified through well-defined, structured case studies and a two-term design project. Several original design problems are obtained primarily from local industry to be performed by groups of 3 to 5 students under the supervision of a faculty and industry advisor operating in a broader academic-industrial setting. The full scope of a realistic design project is thus experienced. The course has been successful and has been expanded to include electrical engineering students. Feedback from industry suggests that the students who have participated in this program are better prepared, have improved communication skills, and function well in team-oriented design projects.

关键词： Education Research and development management Electrical engineering Educational products Job shop scheduling Decision making Uncertainty Risk analysis design engineering design methodology

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The socio-cultural environment in the software process modeling

The socio-cultural environment in the software process model...

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Computer Science Society (SCCC) International conference Chilean FLAGGED

作者： S.T. Acuna G.E. Barchini Universidad Nacional de Santiago del Estero Santiago del Estero Argentina

With regard to the increasing complexity and heterogenization of organizations, the technological and organizational dimensions of software process modeling are passing through an integration period. In this paper, we present a methodological framework to analyze software construction models' cultural feasibility. A symbiotic multi-level software process cycle model (SMPCM) has been designed. This model inter-relates the socio-cultural, scientific/technological and paradigmatic environments. The authors describe the engineering-level processes and how these processes are developed and inter-related among themselves and with the SMPCM environments. Participative and symbiotic methodologies are described in order to model the organization and to reveal its culture, and in order to design and improve dynamic, flexible and evolutive software process models. The proposed methodologies are validated in a study prototype and preliminary results are analyzed.

关键词： Cultural differences Symbiosis Software prototyping Prototypes Technological innovation Electrical capacitance tomography Application software Software quality Floods Humans

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An inner product processor design using novel parallel counter circuits

An inner product processor design using novel parallel count...

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IEEE Asia-Pacific conference on ASIC (AP-ASIC)

作者： Rong Lin A.S. Botha K.E. Kerr G.A. Brown Department of Computer Science SUNY at Geneseo Geneseo NY USA Department of Computer Engineering Rochester Institute of Technology Rochester NY USA Microprocessor Technology Lab Hewlett-Packard Company VLSI Technology Center Fort Collins CO USA

This paper presents a novel parallel inner product processor architecture. The proposed processor has the following features: (1) it can be easily reconfigured for computing inner products of input arrays with four or more types of structures. Typically, each input array may contain 64 8-bit items, or 16 16-bit items, or 4 32-bit items, or 1 64-bit item, with items in unsigned or 2's complement form; (2) it can be pipelined to produce inner products efficiently,; (3) it has a compact VLSI area with very simple reconfigurable components. The processor mainly consists of an array of 8/spl times/8 or 4/spl times/4 small multipliers plus two or three arrays of adders. The total amount of hardware is comparable to a single 64/spl times/64 array multiplier; (4) The whole network is reconfigured through using a few control bits for the desired computations, and the reconfiguration can be done dynamically; (5) The design is highly regular and modular, and most parts of the network are symmetric and repeatable. (6) A set of high performance parallel counter circuits are utilized in the design.

关键词： process design Product design Counting circuits Computer architecture Very large scale integration Adders Hardware Computer networks Concurrent computing High performance computing

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