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vector algorithm FOR LAYERED REINFORCED-CONCRETE SHELL ELEMENT STIFFNESS MATRIX

STRUCTURAL ENGINEERING AND MECHANICS 1995年第2期3卷 173-183页

作者： MIN, CS GUPTA, AK N CAROLINA STATE UNIV CTR NUCL POWER PLANT STRUCT EQUIPMENT & PIPINGRALEIGHNC 27695

A new vector algorithm is presented for computing the stiffness matrices of layered reinforced concrete shell elements. Each element stiffness matrix is represented in terms of three vector arrays of lengths 78, 96 and 36, respectively. One element stiffness matrix is calculated at a time without interruption in the vector calculations for the uncracked or cracked elements. It is shown that the present algorithm is 1.1 to 7.3 times more efficient then a previous algorithm developed by us on a Gray Y-MP supercomputer.

关键词： vector algorithm ELEMENT STIFFNESS MATRIX INELASTIC FINITE ELEMENT ANALYSIS CRAY Y-MP, SUPERCOMPUTER

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A PARALLEL AND vector VARIANT OF THE CYCLIC REDUCTION algorithm

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SIAM JOURNAL ON SCIENTIFIC AND STATISTICAL COMPUTING 1988年第4期9卷 761-765页

作者： SWEET, RA NATL CTR ATMOSPHER RES BOULDERCO 80307

The Buneman variant of the block cyclic reduction algorithm begins as a highly parallel algorithm, but collapses with each reduction to a very serial one. Using partial fraction expansions of rational matrix functions... 详细信息

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Inelastic vector finite element analysis of RC shells

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STRUCTURAL ENGINEERING AND MECHANICS 1996年第2期4卷 139-148页

作者： Min, CS Gupta, AK N CAROLINA STATE UNIV CTR NUCL POWER PLANT STRUCT EQUIPMENT & PIPINGRALEIGHNC 27695

vector algorithms and the relative importance of the four basic modules (computation of element stiffness matrices, assembly of the global stiffness matrix, solution of the system of linear simultaneous equations, and calculation of stresses and strains) of a finite element computer program for inelastic analysis of reinforced concrete shells are presented. Performance of the vector program is compared with a scalar program. For a cooling tower problem, the speedup factor from the scalar to the vector program is 34 for the element stiffness matrices calculation, 25.3 for the assembly of global stiffness matrix, 27.5 for the equation solver, and 37.8 for stresses, strains and nodal forces computations on a Gray Y-MP. The overall speedup factor is 30.9. When the equation solver alone is vectorized, which is computationally the most intensive part of a finite element program, a speedup factor of only 1.9 is achieved. When the rest of the program is also vectorized, a large additional speedup factor of 15.9 is attained. Therefore, it is very important that all the modules in a nonlinear program are vectorized to gain the full potential of the supercomputers. The vector finite element computer program for inelastic analysis of RC shells with layered elements developed in the present study enabled us to perform mesh convergence studies. The vector program can be used for studying the ultimate behavior of RC shells and used as a design tool.

关键词： inelastic inelasticity nonlinear nonlinearity vector computer vector programming vector algorithm finite element method finite element analysis reinforced concrete shells

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Performance Comparative Study Between vector And ECOLOCATION algorithms For Indoor Positioning 7

Performance Comparative Study Between Vector And ECOLOCATION...

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7th International Conference Internet Technologies and Applications (ITA)

作者： Obeidat, H. Obeidat, O. Bomhara, M. Shuaieb, W. Alabdullah, A. Dama, Y. Binmelha, M. Jones, S. Abd-Alhameed, R. Univ Bradford Sch Elect Engn & Comp Sci Bradford W Yorkshire England Wayne State Univ Coll Engn Detroit MI USA An Najah Natl Univ Dept Telecommun Engn Nablus Palestine

ISBN: (纸本)9781509048151

a comparative study of performance is conducted between two indoor positioning algorithms described in the Literature, the vector and Ecolocation algorithms. Both use received signal strength (RSS) to implement a radio frequency fingerprinting technique. The experiment is conducted using commercial ray tracing software called Wireless Insite and Matlab. The vector algorithm performs better than the Ecolocation algorithm, which suffers heavily from an ambiguity issue. For the vector algorithm, the median position error was 2.79 m and 90% of errors were less than 5.72 m

关键词： Ecolocation Indoor localization Ray tracing RF-fingerprinting RSS vector algorithm

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Online measuring method and dynamic characteristics of gas kinetic parameters of linear compressor

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MEASUREMENT 2018年 125卷 545-553页

作者： Zou, Huiming Li, Can Tang, Mingsheng Wang, Min Tian, Changqing Chinese Acad Sci Tech Inst Phys & Chem Key Lab Cryogen Beijing 100190 Peoples R China Chinese Acad Sci Tech Inst Phys & Chem Beijing Key Lab Thermal Sci & Technol Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Gas force has great influence on linear compressor performance and it is normally nonlinear and time varying. To make it easy for the theoretical analysis and control of linear compressor, the gas force is generally represented by an equivalent spring and an equivalent damper, thus the linear model of gas force is important to the precision of the theoretical model. However, the existing numerical linearization methods of gas force are lack of experimental validation. To solve this problem, this paper presents a new online measuring method for the gas kinetic parameters based on a vector algorithm, and builds up an online measuring test bench, then experimentally investigates the dynamics characteristics of the gas kinetic parameters and compares the numerical results with the experimental results. The comparisons show that the numerical results using Fourier transform agree well with the experimental results.

关键词： Linear compressor Gas kinetic parameters Online measuring Dynamic response vector algorithm

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SPARSE MATRIX MULTIPLICATION ON vector COMPUTERS

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International Journal of High Speed Computing 1990年第2期2卷 101-116页

作者： JOCELYNE ERHEL IRISA – INRIA Campus Universitaire de Beaulieu F-35042 RENNES Cedex France

An important kernel of scientific software is the multiplication of a sparse matrix by a vector. The efficiency of the algorithm on a vector computer depends on the storage scheme. With storage by rows, performances are limited in general by the small vector length. Therefore a storage by so-called generalized columns has been designed, which provides long vectors and consequent good performance. However, it is not suitable for the symmetric case. A new type of storage, by sparse diagonals, has thus been defined. It still exhibits long vectors, with performances as good as previously, but it is also well-suited to symmetric matrices. Results on a CRAY 2, with various sparse matrices, compare the three algorithms and show the efficiency of the storage by sparse diagonals.

关键词： Sparse matrix vector algorithm rows generalized columns diagonals

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Research on dynamic characteristics of matrix rectifier

Research on dynamic characteristics of matrix rectifier

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1st IEEE Conference on Industrial Electronics and Applications (ICIEA 2006)

作者： Yang, X. J. Cai, W. Ye, P. S. Gong, Y. M. Shanghai Jiao Tong Univ Dept Elect Engn Huashan Rd Shanghai 200030 Peoples R China Shanghai Univ Dept Automat Shanghai 200072 Peoples R China

ISBN: (纸本)9780780395138

The complete circuit dq transformation of a three phase AC-DC MC, namely matrix rectifier (MR) system, is derived by utilizing circuit dq transformation technique and input current space vector algorithm. Then the model is partially differentially linearized, and the AC small signal circuit model is obtained, so is the state equation of matrix converter system. Based on the system signal-flow chart, the transfer functions of output variables to input variables are derived, then the dynamic behaviors of open loop system is analyzed theoretically. The above theoretical analysis is proved by the simulated results, laying the foundation for further system design. But the case of slightly unbalanced input voltages in practical applications is not considered here.

关键词： three phase AC-DC converter matrix rectifier circuit dq transformation input current space vector algorithm dynamic characteristics

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