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international conference on Computer Communications and Networks (ICCCN)

作者： A. Ziram A.-L. Beylot M. Becker Institut National des Télécommunications Evry France Université de Versailles Saint Quentin en Yvelines Versailles France

ISBN: (纸本)0818690143

this paper generalizes the classical Jacobaeus (1950) method for evaluating the call blocking probabilities in multistage interconnection networks in the context of ATM type traffic. the aim of this generalization is twofold, first the results are extended to capture the heterogeneous, multirate and multiclass nature of the traffic; second it takes into account a path hunting algorithm inside the interconnection network. Sequential routing is chosen. the kernel of the method is computing occupancy probabilities of interstage links. An aggregation method is used for this computation. the accuracy of the method is shown by comparing with simulation. In addition to call blocking evaluation, the method may easily be extended to include other hunting algorithms.

关键词： Switches Asynchronous transfer mode Routing Telecommunication traffic Jacobian matrices Traffic control Computational modeling Telephony Fabrics throughput

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Optimization of the rehabilitation of the Emscher drainage system using continuous rainfall-runoff-modeling

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WATER SCIENCE AND TECHNOLOGY 1997年第8-9期36卷 33-37页

作者： Pfeiffer, E Simon, M Emschergenossenschaft D-45218 Essen Germany Hydrotec Consulting Engineers D-52066 Aachen Germany

the northbound migration of maining activities in the Emscher Region is making the open combined sewer system obsolete. this complex task requires a large number of water resources development activities in the subcatchments of tributaries. To harmonize these single activities and to evaluate their performance as part of the complete system a detailed rainfall-runoff-model of the whole Emscher system has been set up, Intensive anthropogenic impacts made it necessary to use actual system data to run advanced modeling techniques. the model set-up and first applications have been recently completed. the reconstruction of the extreme storm event of January 1995 showed excellent results. One of the major objectives is the reduction of flood levels by decentral retention measures. An evaluation matrix will be set up for the 22 potential sites for flood storage with a total volume of 4.8 million m(3). Reconstruction plans developed through interdisciplinary investigations will be ranked concerning potential for realization and water resources benefits. In the mean and long range the applicability of approaches for flood control strategies using real-time forecasting models will be checked. (C) 1997 IAWQ. Published by Elsevier Science Ltd.

关键词： rainfall-runoff-modeling longterm simulation water resources development project flood control urban and rural hydrology

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Optimization of the rehabilitation of the Emscher drainage system using continuous rainfall-runoff-modeling

Optimization of the rehabilitation of the Emscher drainage s...

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7th IAHR/IAWQ international conference on Urban Storm Drainage

作者： Pfeiffer, E Simon, M Emschergenossenschaft D-45218 Essen Germany Hydrotec Consulting Engineers D-52066 Aachen Germany

关键词： rainfall-runoff-modeling longterm simulation water resources development project flood control urban and rural hydrology

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modeling workflow using tasks and transactions

Modeling workflow using tasks and transactions

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international Workshop on Database and Expert Systems Applications

作者： A.H.H. Ngu Toncan Duong U. Srinivasan School of Computer Science and Engineering University of New South Wales Sydney NSW Australia

the need for workflow management is apparent from the recent increase in the number of products (Lotus Note, SAP Business Workflow, Workmanager) that aim to support various business workflow features. However, a conceptual modeling or specification of workflow is paramount if workflows are to be managed. the authors propose using two distinct constructs to model workflow, the transaction and the task. the transaction deals with the specification of the communication aspects of workflow, while the task deals with the required adaptability of workflow systems. they demonstrate conceptual modeling of workflow using a real-life system in a hospital.

关键词： Software tools Humans Logic Computer science Australia Aging Hospitals Intelligent agent Decision making context

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Concurrency control using a new conflict relation

Concurrency control using a new conflict relation

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international Workshop on Database and Expert Systems Applications

作者： SangKeun Lee SoonYoung Jung Chong-Sun Hwang Department of Computer Science Korea University South Korea

ISBN: (纸本)0818676620

the paper proposes a new conflict relation called preservation. By explicitly including reverse-operations, preservation can be used independently of execution contexts to which different recovery algorithms and/or object models give rise. the paper also makes a two-dimensional (i.e., execution contexts and operations' specifications) comparison between preservation and other conflict relations. In each execution context, a formal comparison reveals that preservation-based concurrency control achieves more concurrency than that which is commutativity-based.

关键词： Concurrency control Object oriented modeling Concurrent computing Database systems Optimized production technology Transaction databases Computer science context modeling Control systems Object oriented databases

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Supporting large meetings with query awareness

Supporting large meetings with query awareness

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international Workshop on Database and Expert Systems Applications

作者： G. Schwabe Hohenheim University Germany

Computer support for large meetings has more profound effects on productivity than computer support for small meetings. this makes the design of support a particularly worthwhile task. the key design issue of "awareness for large groups" is discussed. "Query awareness" provides large groups and especially their facilitators with an overview over the group's activities. the facilitator can query the shared material on the basis of context information (time, persons, subgroup, etc.) and see the results marked in his workspace. the concept of query awareness is demonstrated with the GO (Group Objects) prototype and an object oriented model.

关键词： Object oriented modeling Productivity Prototypes Collaborative software Accidents Concurrent computing Computer architecture Application software Writing

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SciAgents-an agent based environment for distributed, cooperative scientific computing

SciAgents-an agent based environment for distributed, cooper...

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international conference on Tools for Artificial Intelligence (ICTAI)

作者： T.T. Drashansky A. Joshi J.R. Rice Department of Computer Sciences Purdue University West Lafayette IN USA

Problem solving using complex mathematical models of physical phenomena requires expert knowledge in a variety of fields of computer science, such as parallel computing and numerical methods. SciAgents is a problem-solving environment to allow these models to become truly easy to use for the application scientists, much like PC-based systems. It is based on the agent-oriented model of computing. In this paper, we discuss the design and architecture of SciAgents in the context of models based on partial differential equations. We present a set of artificial/computational intelligence techniques used by the cooperating agents that constitute SciAgents, which allows them to complete the program specification and to carry out the program execution with minimal need for user intervention. SciAgents permits the non-expert user to cost-effectively and easily develop software for solving complex mathematical models. It is scalable and allows for extensive reuse of existing software.

关键词： Scientific computing Object oriented modeling Problem-solving Parallel processing Computer architecture Humans Concurrent computing Physics computing Computer science Application software

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FUNDAMENTAL-CONCEPTS AND LIMITATIONS IN PRECISION POINTING AND TRACKING PROBLEMS 7

FUNDAMENTAL-CONCEPTS AND LIMITATIONS IN PRECISION POINTING A...

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7th conference on Acquisition, Tracking, and Pointing

作者： JOHNSON, CD MASTEN, MK Univ. of Alabama in Huntsville (United States) Texas Instruments Inc. (United States)

ISBN: (纸本)0819411868

In this paper, we first describe the generic pointing and tracking problems in a general dynamical system/state-space context. then, we analyze the information-theoretical aspects of the various uncertain signals in those problems, and establish some fundamental performance limitations those uncertainties induce, using various results and principles of modern control theory. It is shown that the introduction of 'waveform models' for uncertain signals, leading to an extended-state formulation of pointing and tracking problems, is the most effective rational means of coping with those fundamental limitations.

关键词： Control systems Information operations Control systems design Computer aided design Mathematical modeling Silicon Dynamical systems Selenium Detection theory Prototyping

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A micro-vectorprocessor Architecture - Performance modeling and Benchmarking - 93

A micro-vectorprocessor Architecture - Performance Modeling ...

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7th international conference on Supercomputing, ICS 1993

作者： Hashimoto, Takashi Hironaka, Tetsuo Murakami, Kazuaki Yasuura, Hiroto Department of Information Systems Interdisciplinary Graduate School of Engineering Sciences Kyushu University Kasuga Fukuoka816 Japan

ISBN: (纸本)089791600X

this paper proposes and examines some architectural features suitable for micro-vectorprocessors. Due to the I/O-pin bottleneck, micro-vectorprocessors should save the off-chip memory bandwidth by exploiting the on-chip register bandwidth instead. those features include the vector-instruction-level multithreading and FIFO vector registers. there are three variations of multithreading: periodic, forced, and round-robin. the paper also formulates the performance of micro-vectorprocessors with such architectural features. And then, the paper evaluates the performance attainable by those micro-vectorprocessors through software simulation. From the benchmark results, it is found that the vector-instruction-level multithreading and FIFO vector registers can improve the performance of the micro-vectorprocessors with the half memory bandwidth comparable to that of ones with the full memory bandwidth. Furthermore, forced multithreading is found to be tolerant to the large memory access latency. From these results, the paper concludes that the forced multithreading at the vector-instruction level is a good candidate for the architectural features suitable to micro-vectorprocessors. © 1993 ACM.

关键词： Vectors

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Trends in Biomathematics: Chaos and Control in Epidemics, Ecosystems, and Cells 1

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1000年

作者： Rubem P. Mondaini

ISBN: (数字)9783030732417

ISBN: (纸本)9783030732400;9783030732431

this volume gathers together selected, peer-reviewed papers presented at the BIOMAT 2020 international Symposium, which was virtually held on November 1-6, 2020, with an organization staff based in Rio de Janeiro, Brazil. Topics covered in this volume include infection modeling, with an emphasis on different aspects of the COVID-19 and novel Coronavirus spread; a description of the effectiveness of quarantine measures via dynamic analysis of SLIR model; hemodynamic simulations in time-dependent domains; an optimal control model for the Ebola disease; and the co-existence of chaos and control in the context of biological models. Texts in agroforestry, economic development, and wastewater treatment processes complete this volume.;Held every year since 2001, the BIOMAT international Symposium gathers together, in a single conference, researchers from Mathematics, Physics, Biology, and affine fields to promote the interdisciplinary exchange of results, ideas and techniques, promoting truly international cooperation for problem discussion. the 20th edition of the BIOMAT international Symposium has received contributions by authors from 18 countries: Algeria, Brazil, Cameroon, Canada, Chile, China (Hong Kong), Colombia, Germany, Hungary, India, Italy, Morocco, Nigeria, Russia, Senegal, South Africa, USA, and Uzbekistan. Previous BIOMAT volumes with selected works from 2017, 2018, and 2019 were also published by Springer.

关键词： Mathematical and Computational Biology Ecology Epidemiology

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