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IEEE/SICE International Symposium on System Integration (SII)

作者： Vesselenyi, T. Bungau, C. Husi, G. Univ Oradea IMT Fac Dept Mechatron Oradea Romania Univ Oradea IMT Fac Dept Managerial Engn Oradea Romania

ISBN: (纸本)9781479969449

Intelligent Building, as a concept, has been established nearly 30 years ago, and it covered the field of building automation. In time, the concept evolved to cover more dynamic systems of complex elements, which actively responds to user's demands. As a result of a project named Intelbuild (HURO 0802/155_AF), University of Oradea and University of Debrecen had developed a laboratory platform with research equipment and software to support research in the Intelligent Building domain. Our paper synthesizes ideas related to applications which can be developed with these equipment and software. The Intelbuild project can be seen as a precursor of project DEnzero (TAMOP-4.2.2.A-11/1/KONV-2012-0041) developed by the University of Debrecen.

关键词： building management systems research and development Intelbuild project University of Debrecen University of Oradea building automation computation techniques dynamic systems intelligent building applications laboratory platform project DEnzero research equipment Buildings Educational institutions Intelligent sensors Laboratories Optical fiber sensors Temperature sensors

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Critical Analysis of Life Span Improvement techniques in Energy Constraints Edge IoT Devices

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SN Computer Science 2023年第3期4卷 221页

作者： Padmini, M.S. Kuzhalvaimozhi, S. Department of Computer Science and Engineering The National Institute of Engineering Mysuru India Department of Information Science and Engineering The National Institute of Engineering Mysuru India

IoT edge computing facilitates data to be processed at a location closer to the place where it is generated. Placing computing closer allows for faster and more reliable service to the users. It also benefits latency-sensitive applications. These benefits are overshadowed by the risk of energy drain in edge IoT devices. Many works have been proposed to improve the life span of edge IoT devices. These works target either computation or communication overhead reduction to minimize energy consumption. This survey does a critical analysis of existing solutions and presents the research gap. In addition to the identification of research gaps, the survey also presents possible solutions at a higher level to address these gaps. © 2023, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.

关键词： Communication strategies computation techniques Energy Internet of things (IOT) Optimization

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Optimization techniques for spectrum handoff in cognitive radio networks using cluster based cooperative spectrum sensing

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WIRELESS NETWORKS 2021年第3期27卷 2173-2192页

作者： Devi, M. Kalpana Umamaheswari, K. Sri Ramakrishna Inst Technol Dept Informat Technol Coimbatore Tamil Nadu India PSG Coll Technol Dept Informat Technol Coimbatore Tamil Nadu India

Spectrum handoff has an undesirable effect in utilizing the space for Secondary user (SU) in the spectrum, which causes a handoff delay in cognitive radio network. The SU frequently faces the problem of handoff process which is likely to interrupt the service and substantial delay over the quality of service during the transmission. It struggles towards identifying the channel during the handoff by occupying a major role in today's era. Based on this research, an effectual spectrum handoff scheme is anticipated using Spectrum Binary Particle Swarm Optimization (SpecBPSO) algorithm and M/G/1 queuing model. Towards improving the efficiency of SU and reducing the congestion over channel, Cluster Based Cooperative Spectrum Sensing (CBCSS) is used. The cluster head is selected dynamically based on the sensing signal of the SU. The cluster head is associated with the SU base station to report the active and inactive channel in the spectrum and later decision report is generated by the fusion center. In this proposed method, SpecBPSO uses the Boolean variable to reduce the total service time for handoff to find the optimal global value using bitwise and mutation operator format. This study work also presents an outline to observe the outcome of primary user's activity and the delay performance of spectrum handoff with the possible interruptions in a CR network. The simulation setup of the proposed work is compared with spectrum particle swarm optimization (SpecPSO), binary particle swarm optimization (BPSO) and ant colony optimization that provide a better tradeoff over the delay achievement, maximize the SNR with the three benchmark functions and optimal handoff.

关键词： Soft computing Evolutionary algorithm Queuing model computation techniques

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Safety analysis of pool-type double containment of system-integrated modular advanced reactor: A case study for Saudi Arabia

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INTERNATIONAL JOURNAL OF ENERGY RESEARCH 2021年第8期45卷 12047-12058页

作者： Khan, Salah Ud-Din Almutairi, Zeyad Alanazi, Meshari Khan, Shahab Ud-Din King Saud Univ Coll Engn Sustainable Energy Technol Ctr POB 800 Riyadh 11421 Saudi Arabia KACARE Energy Res & Innovat Ctr Riyadh Riyadh Saudi Arabia King Saud Univ Coll Engn Mech Engn Dept Riyadh Saudi Arabia King Saud Univ King Abdullah Inst Nanotechnol Riyadh Saudi Arabia Natl Tokamak Fus Program Islamabad Pakistan

In March 2015, the Kingdom of Saudi Arabia signed an agreement with South Korea to build the system-integrated modular advanced reactor (SMART) originally developed by the Korean Atomic Energy Research Institute. The SMART is a structurally contained safe dual-purpose power plant reactor that produces both electricity and desalination. This study aims to design a double-containment structure with a pool-type concept to enhance the SMART safety and develop a robust design for future modular reactors. For that purpose, a theoretical model is developed herein, which leads to the modeling of a double-containment structural design of a water pool. The model calculates various parameters (ie, temperature, pressure, phasic velocities, and condensable gases) and is used to develop a simulation program for use in a computational assessment. Moreover, two best-estimate thermal hydraulic engineering programs, namely THEATRe and RELAP5, are used to simulate the original SMART with the double-containment water pool structure. The differences in the modeling strategies of the two simulation techniques are discussed to accurately measure various technical parameters. Accordingly, a nodalization diagram of the reactor and the pool-type concept are developed and simulated. The results obtained from the computational models yield the error of >2%, depicting accuracy. A small-break loss of coolant accident is also simulated to mitigate the transient conditions. The result verifies the adoptability of this reactor concept in any other small modular reactor.

关键词： computation techniques double containment SMART reactor theoretical model validation water pool

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The Application of a Wave Action Design Technique with Minimal Cost on a Turbocharged Engine Equipped with Water Cooled Charge Air Cooler Aimed for Energy Management

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Energy Procedia 2013年 36卷 948-957页

作者： Haitham Mezher David Chalet Jérôme Migaud Pascal Chesse LUNAM Univeristé Ecole Centrale de Nantes LHEEA UMR CNRS 6598 Nantes France Mann+Hummel Boulevard de la Communication Louverné 53061 Laval France

The vast majority of today's cars remain powered by gasoline or Diesel engines. In the European market, Diesel cars accounts for 55% of all new registrations while gasoline cars for 44%. All the other technologies such as hybrids, fully electric or natural gas and ethanol powered cars combine to make up the remaining 1%. Despite the publicity on these highly anticipated alternative technologies, statistics indicate that their usage remains marginal when compared to more ‘traditional’ powertrains. The internal combustion engine remains the principal way of transportation, at least for the foreseeable years. That being said, undesirable emissions (HC, CO, NOx, PM) are today's major concern because of their negative impact on air quality and global warming. The latest Euro 6 standard limits the CO emissions on a gasoline engine to 68% and the PM (particulate matter) on a Diesel engine to 96% lower than those established in 1992. CO2 emissions which are directly proportional to consumption rates are recently added to the list with a target of 95 g/Km for 2020. The main trend for solving these issues is through engine downsizing with high rates of turbocharging accompanied by fuel injection control, after-treatment and system integration. techniques that increment the energy saving costs. The ICCT (International Council on Clean Transportation) estimates that the cost of taking a 4-cylinder 1.5L Diesel engine from no emission controls to the Euro 6 standard is around US$1400. A major technique to gain control of the engine processes and achieve high performance and low emission levels is through air handling depicted by air intake tuning, turbocharging tuning and charge air cooling. This article briefly describes the air intake line of 4-cylinder 1.5L turbocharged Diesel engine and investigates the role of wave action phenomena on its intake line. The goal here is to achieve lower consumption and better performance by finding the optimal intake geometry. The latter com

关键词： Energy Saving and Efficiency Measures Simulation Software computation techniques Internal Combustion Engines Wave Action and Acoustic Supercharging Frequency Domain Modeling Pollution Control Transportation Systems.

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computational Dynamics, Third Edition 1

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2009年

作者： Ahmed A. Shabana

ISBN: (数字)9780470686850

ISBN: (纸本)9780470686157

computational Dynamics, 3rd edition , thoroughly revised and updated, provides logical coverage of both theory and numerical computation techniques for practical applications. The author introduces students to this advanced topic covering the concepts, definitions and techniques used in multi-body system dynamics including essential coverage of kinematics and dynamics of motion in three dimensions. He uses analytical tools including Lagrangian and Hamiltonian methods as well as Newton-Euler Equations. An educational version of multibody computer code is now included in this new edition ***/go/shabana that can be used for instruction and demonstration of the theories and formulations presented in the book, and a new chapter is included to explain the use of this code in solving practical engineering problems. Most books treat the subject of dynamics from an analytical point of view, focusing on the techniques for analyzing the problems presented. This book is exceptional in that it covers the practical computational methods used to solve "real-world"problems. This makes it of particular interest not only for senior/ graduate courses in mechanical and aerospace engineering, but also to professional engineers. Modern and focused treatment of the mathematical techniques, physical theories and application of rigid body mechanics that emphasizes the fundamentals of the subject, stresses the importance of computational methods and offers a wide variety of examples. Each chapter features simple examples that show the main ideas and procedures, as well as straightforward problem sets that facilitate learning and help readers build problem-solving skills

关键词： logical practical computation techniques coverage theory applications students topic advanced introduces concepts author dimensions kinematics three motion essential coverage system dynamics multibody newtoneuler methods

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Fast likelihood computation techniques in nearest-neighbor based search for continuous speech recognition

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IEEE SIGNAL PROCESSING LETTERS 2001年第8期8卷 221-224页

作者： Pellom, BL Sarikaya, R Hansen, JHL Univ Colorado Ctr Speech & Language Res Boulder CO 80309 USA

This paper describes two effective algorithms that reduce the computational complexity of state likelihood computation in mixture-based Gaussian speech recognition systems, We consider a baseline recognition system that uses nearest-neighbor search and partial distance elimination (PDE) to compute state likelihoods. The first algorithm exploits the high dependence exhibited among subsequent feature vectors to predict the best scoring mixture for each state, The method, termed best mixture prediction (BMP), leads to further speed improvement in the PDE technique. The second technique, termed feature component reordering (FCR), takes advantage of the variable contribution levels made to the final distortion score for each dimension of the feature and mean space vectors. The combination of two techniques with PDE reduces the computational time for likelihood computation by 29.8% over baseline likelihood computation. The algorithms are shown to yield the same accuracy level without further memory requirements for the November 1992 ARPA Wall Street Journal (WSJ) task.

关键词： .reordering feature vectors Nearest-Neighbor BMP Fast Likelihood computation techniques Continuous Speech Recognition best mixture PDE technique

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Level repulsion and the dynamical diagonalization of matrices

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PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 2002年第1-2期312卷 153-158页

作者： Pato, MP Univ Fed Sao Paulo Inst Fis BR-08315970 Sao Paulo Brazil

A set of first-order coupled equations of motion for eigenvalues and eigenvectors of a generic matrix is derived in terms of the equation of motion for the matrix itself. An efficient method of diagonalization is then constructed by defining an appropriate dynamics for the matrix. A comparison with the standard diagonalization method based on Jacobi transformations is made. (C) 2002 Elsevier Science B.V. All rights reserved.

关键词： statistical models computation techniques quantum computation

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BIFURCATIONS OF LIOUVILLE-TORI OF AN INTEGRABLE CASE OF SWINGING ATWOOD MACHINE

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NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-GENERAL PHYSICS RELATIVITY ASTRONOMY AND MATHEMATICAL PHYSICS AND METHODS 1995年第9期110卷 1111-1121页

作者： OUAZZANITH, A OUAZZANIJAMIL, M Laboratoire de Physique du Solide Faculté des Sciences Morocco

We give a complete description of the real phase space topology of a swinging Atwood's machine. All generic bifurcations of Liouville tori were determined theoretically and numerically. We give also an explicit pe... 详细信息

关键词： 02.70 03.20 04.40 Classical mechanics of discrete systems: general mathematical aspects computation techniques Continuous media electromagnetic and other mixed gravitational systems

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NUMERICAL EVALUATION OF THE KINETIC-ENERGY OPERATOR

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NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-GENERAL PHYSICS RELATIVITY ASTRONOMY AND MATHEMATICAL PHYSICS AND METHODS 1994年第10期109卷 1039-1048页

作者： HAIDER, Q Physics Department Fordham University Bronx USA

The numerical accuracy of computing the kinetic energy of a quantum-mechanical system using the gradient operator is studied in this paper. To this end, a matrix formulation for deriving multi-point central-difference formulas for the first and higher-order derivatives of a non-singular function is developed. In particular, 7-point and 9-point formulas for derivatives of order one through six and one through eight, respectively, have been derived explicitly. Accuracy of the formulas has been tested by comparing the calculated values of the derivatives of a function with the exact ones. The 9-point formula for the gradient has been used to compute the kinetic energy of a particle and the results have been compared with those of the 9-point Laplacian. The calculations indicate that the kinetic energy computed via the gradient operator is as accurate as that obtained via the Laplacian operator.

关键词： computation techniques Numerical approximation and analysis Numerical differentiation and integration

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