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Evaluation of an actuator placement method for active noise control applications

JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME 1998年第4期120卷 875-879页

作者： Naghshineh, K Heck, LP Olkin, JA Kamman, JW Western Michigan Univ Dept Mech & Aeronaut Engn Kalamazoo MI 49008 USA

In our previous work, we developed a new actuator placement algorithm that is capable of selecting the best actuator placement for active noise control problems over a broad band of frequencies. The actuator selection algorithm is based on a novel extension of the Householder QR subset selection algorithm. The QR algorithm uses the l(2) matrix norm as a performance measure. In this paper, numerical results generated by that algorithm are compared with numerical results generated using five different performance measures. These measures, which are based on different matrix norms and functions of the actuator frequency responses, yield actuator placements that result in active noise control systems with improved performance and robustness.

关键词： Actuators Noise control Frequency response Robustness selection algorithm algorithms

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ANALYSIS OF THE GEOMETRIC DILUTION OF PRECISION USING THE EIGENVALUE APPROACH

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JOURNAL OF GUIDANCE CONTROL AND DYNAMICS 1987年第5期10卷 509-512页

作者： KOSAKA, M Systems Development Laboratory Hitachi Ltd. Japan

Geometric dilution of precision (GDOP) has been considered as a criterion for the selection of GPS satellites. The benefit of the eigenvalue approach is that the relationship between GDOP and observation directions can be expressed explicitly. In the present paper, this benefit is used to propose a novel geometric interpretation of GDOP by using an eigenvalue approach. Based on this interpretation, two simple methods of selecting GPS satellites are derived which do not need matrix inversion calculations. (B.J.)

关键词： Geometric Dilution of Precision Eigenvalues Satellite Constellations GPS GPS Satellites Model Reference Adaptive Control selection algorithm

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MODEL CORRELATION USING MULTIPLE STATIC LOAD AND VIBRATION TESTS

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AIAA JOURNAL 1995年第11期33卷 2182-2188页

作者： ZIMMERMAN, DC SIMMERMACHER, T University of Houston Houston Texas 77204-4792

In this paper, algorithmic approaches to enhance damage detection and model refinement capability are developed for cases in which experimental data from multiple tests are available. The tests may include both multiple vibration tests and multiple static load tests. The use of multitest measurements are shown to be one method to address a part of the incomplete measurement problem common to system health monitoring and model refinement, namely, the mismatch in the number of measured vibration modes in comparison to the number of modes included in the analytical finite element model. Key points made in the development will be highlighted using numerical experiments.

关键词： Finite Element Analysis System Health Monitoring selection algorithm Singular Value Decomposition Perturbation Method Cantilever Beam Sequential Linear Programming algorithm Performance Structural Modeling Young's Modulus

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Short-term load forecasting using a kernel-based support vector regression combination model

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APPLIED ENERGY 2014年 132卷 602-609页

作者： Che, JinXing Wang, JianZhou NanChang Inst Technol Coll Sci Nanchang 330099 Jiangxi Peoples R China Lanzhou Univ Sch Math & Stat Lanzhou 730000 Gansu Peoples R China

Kernel-based methods, such as support vector regression (SVR), have demonstrated satisfactory performance in short-term load forecasting (STLF) application. However, the good performance of kernel-based method depends on the selection of an appropriate kernel function that fits the learning target, unsuitable kernel function or hyper-parameters setting may lead to significantly poor performance. To get the optimal kernel function of STLF problem, this paper proposes a kernel-based SVR combination model by using a novel individual model selection algorithm. Moreover, the proposed combination model provides a new way to kernel function selection of SVR model. The performance and electric load forecast accuracy of the proposed model are assessed by means of real data from the Australia and California Power Grid, respectively. The simulation results from numerical tables and figures show that the proposed combination model increases electric load forecasting accuracy compared to the best individual kernel-based SVR model. (c) 2014 Elsevier Ltd. All rights reserved.

关键词： Short-term load forecasting Kernel Support vector regression Combination model selection algorithm

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ROLE OF DATA-BASE MANAGEMENT IN DESIGN OPTIMIZATION SYSTEMS

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JOURNAL OF AIRCRAFT 1987年第11期24卷 745-750页

作者： PARK, GJ ARORA, JS University of Iowa Iowa City Iowa

To study the role of data base and data base management system, an interactive design optimization software system called IDESIGN5 is developed to solve nonlinear programming problems. Four promising algorithms are included to overcome the lack of unanimous choice of an algorithm. Tuning parameters and procedures of algorithms are implemented through extensive numerical experimentation. The interactive process consists of menu displays, advice for decisions, and applicable messages. Input data can be created interactively and the designer can change problem parameters, algorithm, and design variable data at any point of execution. If a design variable does not effect the optimization process, it can be given a fixed value interactively. Discrete variable optimization can be performed by using design variable status capability of the system. Graphics facilities are provided for decision making. The system consists of several modules that communicate with each other through a data base managed by a data base management system. Several example problems are solved in batch and interactive environments to test the system. © Institute of Aeronautics and Astronautics, Inc., 1987. All rights reserved.

关键词： DBMS Nonlinear Programming Trusses Software Development Finite Element Analysis Sensitivity Analysis Numerical Modeling Finite Element Method Software Finite Difference Method selection algorithm

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Finding the minimum number of elements with sum above a threshold

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INFORMATION SCIENCES 2013年 238卷 205-211页

作者： Jiang, Yan Pang, Chaoyi Zhang, Hao Lan Wang, Junhu Li, Tongliang Zhang, Qing He, Jing Zhejiang Univ Ctr Data Management & Intelligent Comp NIT Ningbo Zhejiang Peoples R China Hebei Acad Sci Inst Appl Math Shijiazhuang Peoples R China CSIRO ICT Ctr Brisbane Qld Australia Griffith Univ Sch Informat & Commun Technol Nathan Qld 4111 Australia Victoria Univ Ctr Appl Informat Melbourne Vic 8001 Australia

Motivated by the wavelet compression techniques and their applications, we consider the following problem: Given an unsorted array of numerical values and a threshold, what is the minimum number of elements chosen from the array, such that the sum of these elements is not less than the threshold value. In this article, we first provide two linear time algorithms for the problem. We then demonstrate the efficacy of these algorithms through experiments. Lastly, as an application of this research, we indicate that the construction of wavelet synopses on a prescribed error bound (in L-2 metric) can be solved in linear time. (C) 2013 Elsevier Inc. All rights reserved.

关键词： selection algorithm Haar wavelet Data compression Data representation

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Data reuse algorithm for multiple reference frame motion estimation

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ELECTRONICS LETTERS 2007年第7期43卷 382-383页

作者： Shim, H. Kyung, C.-M. Korea Adv Inst Sci & Technol Div Elect Engn Sch Elect Engn & Comp Sci Taejon 305701 South Korea

A data reuse algorithm for multiple reference frame motion estimation is described. The proposed algorithm reduces memory access by modifying the reference frame search order and search centre such that the likelihood of data reuse is increased. Experimental results show that the algorithm reduces memory access by 15-30% compared to the conventional fast reference frame selection algorithm, while maintaining similar bit rate and PSNR.

关键词： REFERENCE FRAMES algorithms selection algorithm Peak signal-to-noise ratio Access

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An extension of mechanism design optimization for motion generation

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MECHANISM AND MACHINE THEORY 2009年第9期44卷 1759-1767页

作者： Shen, Qiong Al-Smadi, Yahia M. Martin, Peter J. Russell, Kevin Sodhi, Raj S. USA Ctr Res Dev & Engn Armaments Engn & Technol Ctr Picatinny Arsenal NJ 07806 USA New Jersey Inst Technol Dept Mech Engn Newark NJ 07102 USA AECOM Special Struct Grp New York NY 10005 USA

As an extension of the authors published work on a search algorithm for motion generation with Grashof, transmission angle and linkage perimeter conditions [P.J. Martin, K. Russell, R.S. Sodhi, On mechanism design optimization for motion generation, Mechanism and Machine Theory 42 (10) (2007) 1251-1263], this work formulates a goal program to generate four-bar mechanism fixed and moving pivot loci that considers prescribed coupler poses, a coupler load and maximum driver static torques. Published by Elsevier Ltd.

关键词： Motion generation Coupler load Planar mechanism Four-bar mechanism Optimization selection algorithm

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Traffic engineering enhancement to QoS-OSPF in DiffServ and MPLS networks

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IEE PROCEEDINGS-COMMUNICATIONS 2004年第1期151卷 101-106页

作者： Lim, SH Yaacob, MH Phang, KK Ling, TC Univ Malaya Fac Comp Sci & Informat Technol Kuala Lumpur 50603 Malaysia

In the paper, a traffic engineering enhancement to the QoS-OSPF routing protocol is proposed and used as the path selection algorithm in a DiffServ-MPLS network. The proposed scheme, TE-QOSPF, exploits the use of non-shortest paths to improve load-balancing and avoid network congestion. Simulation results show that the algorithm outperforms the QoS-OSPF scheme in terms of loss ratio, link utilisation, and delay.

关键词： Load balancing multiprotocol label switching network shortest path Traffic engineering selection algorithm Refractive surgery enhancement differentiated network service

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SELECT-PARTITIONED JOIN - AN IMPROVED PARTITION-BASED JOIN algorithm

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INFORMATION SYSTEMS 1991年第2期16卷 199-209页

作者： HO, C JONG, SP MYUNGHWAN, K CORNELL UNIV SCH ELECT ENGN ITHACA NY 14853 USA

We propose a new partition-based join algorithm, called select-partitioned join, which performs better than the sort-merge and hash-partitioned join. The proposed select-partitioned join algorithm consists of three major steps. The first step is to determine a partitioning pattern by which the total join cost can be minimized and choose the bound values of the buckets by using a selection algorithm. The second is to partition both relations into ranged buckets according to the partitioning pattern and the bound values chosen in the previous step. And the last step is to apply the nested-block join on the partitioned bucket pairs. The selection algorithm is based on the cumulative distribution function and it is performed by a single scan of the smaller relation. The performance of the select-partitioned join is analyzed in terms of the number of I/Os and compared with the sort-merge and hash-partitioned join algorithms. Our join algorithm is better than a hash-partitioned join algorithm, which is, in general, known to be better for the join operation. Simulation experiments are conducted for the join algorithms.

关键词： JOIN algorithm RELATIONAL DATABASE selection algorithm CUMULATIVE DISTRIBUTION FUNCTION

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