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检索条件"主题词=Recursive algorithm"

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High Performance recursive LU Factorization for Multicore Systems 14

High Performance Recursive LU Factorization for Multicore Sy...

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14th IEEE/ACS International Conference on Computer Systems and Applications (AICCSA)

作者： Mahfoudhi, Ryma Univ Tunis El Manar Fac Sci Tunis Algorithm Parallele & Optimisat UR13ES38 Tunis 2092 Tunisia

ISBN: (纸本)9781538635810

The LU factorization (LUF) algorithm is an important kernel used in many Linear Algebra applications such as the resolution of systems of linear equations, the inversion of square matrices and the computation of matrix eigenvalues. It is also used in the LINPACK benchmark for ranking the Top 500 most powerful supercomputers. We propose in this paper a parallel recursive algorithm for LUF based on the 'Divide and Conquer' paradigm. A theoretical performance study permits to establish an accurate comparison between the designed algorithm and the PBLAS library. We achieved a series of experiments that permits to validate the contribution and lead to efficient performances obtained for large sized matrices i.e. up to 40% faster than SCALAPACK.

关键词： Divide and Conquer LU factorization Multicore architecture Parallel algorithm PBLAS recursive algorithm

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The Calculation of Product Carbon Footprint and Optimization Design

The Calculation of Product Carbon Footprint and Optimization...

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2nd International Conference on Measurement, Instrumentation and Automation (ICMIA 2013)

作者： Ma, Haishu Zhou, Chuanhong Wang, Kesheng Xiao, Jinjie Shanghai Univ Sch Mechatron Engn & Automat Shanghai Key Lab Mech Automat & Robot Shanghai 200072 Peoples R China Norwegian Univ Sci & Technol Dept Product & Quality Engn Oslo Norway

ISBN: (纸本)9783037857502

With more and more governments and organizations taking Carbon Footprint as the measure of greenhouse gas emission, the study about the calculation of carbon footprint has become a hot spot. The paper analyzed the carbon footprint in different stages of a product life circle, including manufacturing, transporting, using and disposing and also studied the part contributing the largest carbon emission. Especially in the calculation of carbon emission of manufacturing stage, recursive call algorithm was applied. The optimization design model of carbon footprint was also depicted. All the work this paper had undertaken facilitates to formulate specific carbon emission reduction measures.

关键词： Carbon Footprint recursive algorithm Optimization Design Life Cycle Assessment

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Numerically Controlled Linear Chirp Oscillator 5

Numerically Controlled Linear Chirp Oscillator

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5th Mediterranean Conference on Embedded Computing (MECO)

作者： Lesnikov, V. Chastikov, A. Garsh, D. Naumovich, T. Vyatka State Univ Dept Radio Elect Aids Kirov Russia

It is proposed the recursive generator of complex samples of the linear chirp. The generator is characterized by minimum possible memory size and the minimum time of tuning.

ISBN: (纸本)9781509022212

It is proposed the recursive generator of complex samples of the linear chirp. The generator is characterized by minimum possible memory size and the minimum time of tuning.

关键词： sampling linear chirp numerically controlled oscillator direct digital synthesis recursive algorithm

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Fast Tracking Method of Inertial Constant Based on System Identification 5

Fast Tracking Method of Inertial Constant Based on System Id...

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5th International Conference on Power and Energy Technology, ICPET 2023

作者： Zhang, Bo Zhang, Chengjian Zhang, Jing North China Electric Power University Department of Electrical Engineering Baoding China

ISBN: (纸本)9798350339673

Aiming at the problem of quantitative inertia evaluation of new energy electric power system, the system inertia constant tracking method based on system identification is studied. The method is divided into two categories: non-recursive algorithm and recursive algorithm. From the perspective of identification principle, the difference and internal relationship between the two in terms of calculation storage and identification speed are analyzed. The IEEE typical system is used to compare and verify the experimental examples. Theoretical analysis and experimental results show that the recursive algorithm has high identification accuracy, stable identification results and fast identification speed. It is suitable for the identification objects with large number of nodes and complex structure, which is conducive to the real-time monitoring and fast perception of the inertia constant of the new energy power system. © 2023 IEEE.

关键词： electric power system, inertia constant, system identification, quantitative evaluation, non-recursive algorithm recursive algorithm

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recursive Closed-loop PARSIM-E Subspace Identification

Recursive Closed-loop PARSIM-E Subspace Identification

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17th IFAC Symposium on System Identification (SYSID 2015)

作者： Hou, Jie Chen, Fengwei Liu, Tao Dalian Univ Technol Sch Control Sci & Engn Dalian Peoples R China

In this paper a recursive closed-loop PARSIMonious subspace identification method using modified innovation Estimation (PARSIM-E) is proposed, which can significantly improve computational efficiency for practical application. By recursively updating the product of the extended observability and controllability matrices, the non-causal parameters included in the triangular Toeplitz matrices are left out to avoid redundant estimation. A propagator is used to extract the system state in order to estimate the system matrices. The convergence of the proposed method is analyzed with a strict proof. Two illustrative examples arc given to demonstrate the effectiveness of proposed algorithm. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： state-space model closed-loop identification recursive algorithm propagator convergence

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The algorithm and realization for the optimization layout of irregular parts

The algorithm and realization for the optimization layout of...

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6th International Forum on Strategic Technology, IFOST 2011

作者： Guo, Wenlan Zhang, Tong Computer Science and Technology College Harbin Univ.Sci.Tech. Harbin China Tianyuan CNC Equipment Co. Ltd. Harbin Institute of Technology Harbin China

ISBN: (纸本)9781457703966

Pointing to the optimization layout problem of irregular parts on the rectangular area, this paper proposes a kind of the combined algorithm, which is based on the scan line algorithm and the pre-layout method. The main idea of this algorithm is to continuously nest parts by a local optimal principle until the end of the layout which includes a recursive algorithm. The experimental results show that the algorithm not only calculates quickly, but also can get a more satisfied layout result. © 2011 IEEE.

关键词： algorithm design and analysis Industries Layout Production Shape Software Steel irregular part optimization layout irregular parts local optimal principle maintenance engineering optimisation prelayout method rectangular area recursive algorithm recursive functions scan line algorithm the layout the nested layout the scan algorithm

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Quality comparison between hybrid regularized exponential forgetting algorithm with alternative covariance matrix and selected standard long-run on-line identification methods of industrial systems 17

Quality comparison between hybrid regularized exponential fo...

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17th Conference on Applied Mathematics, APLIMAT 2018

作者： Vachálek, Ján Melicher, Markus Vašek, Pavol Šišmišová, Dana Volenský, Tomáš Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology in Bratislava Nám. slobody 17 Bratislava812 31 Slovakia

ISBN: (纸本)9788022747653

This paper compares the quality of standardly used ON-LINE identification algorithms like directional forgetting and regularized exponential forgetting with the hybrid algorithm of exponential forgetting with an alternative covariance matrix. It points also to the behavior of selected algorithms in different deployment conditions and different run times. Particularly interesting is the long-run deployment, which correlates with use in industry. Based on the results obtained, decisions will be taken about the suitability of the hybrid regularized exponential forgetting algorithm with an alternative covariance matrix for selected industrial deployment scenarios. © 2018 Slovak University of Technology in Bratislava. All rights reserved.

关键词： Adaptive control Forgetting method Long-run on-line identification recursive algorithm Time varying parameters

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An Analytical Solution of Scattering by a Buried Two Concentric Sphere

An Analytical Solution of Scattering by a Buried Two Concent...

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2020 Cross Strait Radio Science and Wireless Technology Conference

作者： Geng, You-lin Wu, Liang-jie Zhang, Peng-quan Hangzhou Dianzi Univ Inst Antennas & Microwaves Hangzhou 310018 Peoples R China

ISBN: (纸本)9781728181813

Based on the image method and addition theorem of spherical vector wave functions, a solution to the multiple scattering by a buried concentric spheres is *** iterative process to obtain the scattered field is discussed in this paper by using boundary conditions on the boundary between the free space and the buried area, inner and outer spheres of the concentric spheres, respectively.

关键词： Electromagnetic scattering recursive algorithm spherical vector wave functions two concentric sphere

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Generation System Reliability Assessment Incorporating Photovoltaic Energy

Generation System Reliability Assessment Incorporating Photo...

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International Conference on Emerging Trends and Advances in Electrical Engineering and Renewable Energy (ETAEERE)

作者： Krishna, K. Shivarama Kumar, K. Sathish VIT Univ Sch Elect Engn Vellore 632014 Tamil Nadu India

ISBN: (纸本)9789811043949;9789811043932

The reliability assessment of generation system including photovoltaic energy has been described in this article. In general, the reliability analysis of power system can be done at three Hierarchical Levels, but here the reliability analysis of power system is performed at generation level. Therefore the reliability is accomplished at Hierarchical Level-I (HL-I). The intermittent nature of solar irradiance and failure rate of the components have been considered for the development of photovoltaic system. The annual solar data has been considered, in which the generation from the photovoltaic system is made into different states using Fuzzy C-Means clustering method. In addition, the Markov process has been implemented not only to obtain the probability of the photovoltaic model but also its frequency and duration for all the specified states. Finally, the recursive algorithm is used to evaluate the indices of the reliability for Roy Billinton Test System including photovoltaic unit.

关键词： Fuzzy C-means Markov process Photovoltaic system Reliability assessment recursive algorithm Reliability indices

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An algorithm for edge-magic total labeling of composite graphs

An algorithm for edge-magic total labeling of composite grap...

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2020 IEEE International Conference on Information Technology, Big Data and Artificial Intelligence, ICIBA 2020

作者： Shao, Shuhong Li, Jingwen Yuan, Qinghou Wang, Bimei School of Electronic and Information Engineering Lanzhou Jiaotong University Lanzhou Gansu Province730070 China

ISBN: (纸本)9781728152240

If the labeling values of edges and vertexs for a graph G(p, q) are mapped to 1, 2, , p+q, and the sum of the labels of any two vertexs and their associated edges is equal to a constant, this labeling is called edge-magic total labeling. In this paper, a recursive algorithm is designed to obtain the edge-magic total labeling of the finite vertex composite graph. Through the analysis of the results, It is found that the composite graph F_nrightarrow C_luparrow S_m is an EMTL graph, and then some theorems are summarized and proved. © 2020 IEEE.

关键词： Composite graphs Edge-magic graphs Edge-magic total labeling recursive algorithm

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