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parallel intubation technique with the Vie Scope® laryngoscope

CANADIAN JOURNAL OF ANESTHESIA-JOURNAL CANADIEN D ANESTHESIE 2024年第3期71卷 435-436页

作者： Henlin, Tomas Michalek, Pavel Gaszynski, Tomasz Soltes, Jan First Med Fac Dept Anesthesia & Intens Care Med Prague Czech Republic Univ Mil Hosp Prague Czech Republic Gen Univ Hosp Prague Dept Anesthesiol Resuscitat & Intens Care Med Prague Czech Republic Med Univ Lodz Dept Anaesthesiol & Intens Therapy Lodz Poland

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Temperature-drift effect analysis of microstrip filters based on parallel high-order DGTD and FETD method with memory reduction technique

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ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 2023年 155卷 1177-1185页

作者： Jia, Zhenglang Zhang, Huanhuan Wang, Panpan Sha, Wei E. I. Xidian Univ Natl Key Lab Antennas & Microwave Technol Xian 710071 Peoples R China Zhejiang Univ Coll Informat Sci & Elect Engn Hangzhou 310058 Peoples R China

The temperature-drift effect of microstrip filters is analyzed by the proposed electromagnetic-thermal co simulation method based on parallel high-order discontinuous Galerkin time domain (DGTD) and finite-element time-domain (FETD) algorithms with a memory reduction technique. The element matrices of DGTD method are factorized into the product of coefficient matrices and universal matrices. The coefficient matrices are different for each tetrahedral element and need to be stored for all the elements. While the universal matrices are the same for all the tetrahedral elements and only need to be stored for one element. Since the sizes of the coefficient matrices are much smaller than the element matrices of DGTD method, the proposed method avoids storing the large element matrices and greatly reduce the memory requirement of the DGTD method. Thus it reduces the memory requirement of the whole electromagnetic-thermal co-simulation which is dominated by the memory consumption of the DGTD method. Large-scale parallel technique is adopted to accelerate the process of electromagnetic-thermal co-simulation. The proposed method provides a very powerful tool for temperature-drift effect analysis of microstrip filters.

关键词： Electromagnetic-thermal co-simulation DGTD method Memory reduction technique parallel technique Microstrip filters

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A parallel deep adaptive large neighbourhood search algorithm for distributed heterogeneous hybrid flow shops with mixed-model assembly scheduling

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ENGINEERING OPTIMIZATION 2025年第2期57卷 543-570页

作者： Shao, Weishi Shao, Zhongshi Pi, Dechang Nanjing Normal Univ Sch Comp & Elect Informat Sch Artificial Intelligence Nanjing Peoples R China Nanjing Univ Aeronaut & Astronaut Coll Comp Sci & Technol Nanjing Peoples R China Informat Secur & Privacy Protect Technol Nanjing Peoples R China Minist Educ Key Lab Numer Simulat Large Scale Complex Syst Beijing Peoples R China Shaanxi Normal Univ Sch Comp Sci Xian Peoples R China

Nowadays, manufacturing enterprises must have fast response and flexible production capabilities to meet personalized and diversified market demands. Mixed-model production and distributed production have become the preferred production methods for enterprises. This article studies a distributed heterogeneous hybrid flow shop scheduling problem with a mixed-model assembly line (DHHFSP-MMAL), which consists of manufacturing and assembly stages. The DHHFSP-MMAL is modelled by a mixed integer linear programming (MILP) model. Three constructive heuristics and a parallel deep adaptive large neighbourhood search (PDALNS) problem are presented. A constructive heuristic with a group strategy is employed to obtain an initial solution. Several deep destroy-and-repair operators are proposed where problem-specific greedy local search methods are applied. The PDALNS assigns weights to destroy-and-repair operators to guide the selection of operators. The parallel computing technique is introduced to increase the efficiency of training. The experiments demonstrate that the PDALNS algorithm is an efficient and effective algorithm for solving the DHHFSP-MMAL problem.

关键词： Distributed heterogeneous hybrid flow shop mixed-model assembly line adaptive large neighbourhood search scheduling parallel technique

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parallel Computation of Complex Antennas around the Coated Object Using Iterative Vector Fields technique

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IEICE TRANSACTIONS ON ELECTRONICS 2014年第7期E97C卷 661-669页

作者： Yan, Ying Zhao, Xunwang Zhang, Yu Liang, Changhong Ma, Zhewang Xidian Univ Sci & Technol Antenna & Microwave Lab Xian 710071 Shaanxi Peoples R China Saitama Univ Grad Sch Sci & Engn Sakura Ku Saitama 3388570 Japan

In this paper, a novel hybrid technique for analyzing complex antennas around the coated object is proposed, which is termed as "iterative vector fields with Physical Optics (PO)". A closed box is used to enclose the antennas and the complex field vectors on the box' surfaces can then be obtained using Huygens principle. The equivalent electromagnetic currents on Huygens surfaces are computed by Higher-order Method of Moments (HOB-MoM) and the fields scattered from the coated object are calculated by PO method. In addition, the parallel technique based on Message Passing Interface (MPI) and Scalable Linear Algebra Package (ScaLAPACK) is employed so as to accelerate the computation. Numerical examples are presented to validate and to show the effectiveness of the proposed method on solving the practical engineering problem.

关键词： complex antenna around coated object iterative vector fields with Physical Optics (PO) Higher-order Method of Moments parallel technique

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Efficient approach for ground dynamic impedance function of the large-scale nuclear power plant footing under a layered site considering the embedded effect

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COMPUTERS AND GEOTECHNICS 2025年 178卷

作者： Li, Jianbo Hou, Hongwei Li, Zhiyuan Lin, Gao Dalian Univ Technol State Key Lab Coast & Offshore Engn Dalian 116024 Peoples R China Dalian Univ Technol Inst Earthquake Engn Dalian 116024 Peoples R China China Inst Water Resources & Hydropower Res Earthquake Engn Res Ctr Beijing 100038 Peoples R China

Simplified lumped-parameter model in nuclear power standards have been commonly applied for ground-nuclear island structure interaction investigation. However, when considering the fine far-field radiation damping effect, the previous simplified models cannot reflect the correlation of the infinite-domain dynamic impedance function with respect to the excitation frequency as well as take into consideration the non-homogeneity of layered ground. Furthermore, the global coupling characteristics of the high-precision artificial boundaries will lead to a sudden increase in the computational cost. In this study, a large-scale calculation method for nuclear island structures through the scaled boundary finite element method (SBFEM) is developed, which can consider the embedded effect and is applicable to the coupling of the dynamic impedance function under layered ground conditions. A method of decoupling the near and far field interface domain is introduced, which solves the full matrix storage limitation for dynamic stiffness (DS) matrix according to original SBFEM, and adopts the partitioned parallel technique to improve the inverse efficiency of large matrices in the process of dynamic condensation. Numerical examples show that the proposed algorithm has good accuracy and applicability for different foundation shapes, foundation embedment effects, and layered characteristics of ground, and provides engineering references for the calculation of dynamic impedance function under large-scale nuclear power plants.

关键词： Dynamic impedance function FEM-SBFEM Large scale parallel technique Layered site

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Time-Domain Shielding Effectiveness Analysis Based on DGTD Method Accelerated by Local Time-Stepping and parallel techniques

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IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY 2023年第3期65卷 900-911页

作者： Jia, Zheng Lang Zhang, Huan Huan Ding, Da Zhi Zhao, Lei Ren, Qiang Jiang, Li Jun Xidian Univ Natl Key Lab Antennas & Microwave Technol Xian Peoples R China Nanjing Univ Sci & Technol Dept Commun Engn Nanjing Peoples R China China Univ Min & Technol Sch Informat & Control Engn Xuzhou Peoples R China Beihang Univ Sch Elect & Informat Engn Beijing Peoples R China Univ Hong Kong Dept Elect & Elect Engn Hong Kong Peoples R China

The discontinuous Galerkin time-domain (DGTD) method accelerated by local time-stepping (LTS) and parallel techniques is employed to analyze the time-domain shielding effectiveness (TDSE) of metallic enclosures. The detailed formulations and implementation procedures of the DGTD method and LTS and parallel techniques are introduced. Numerical results validate the correctness of the proposed method. Moreover, the influence of various design parameters of the metallic enclosure, including aperture dimensions, wall thickness, spacing of aperture arrays, etc., on the TDSE are analyzed by the proposed method. Some rules are given for the design of the enclosure with rectangular apertures from the perspective of TDSE. The proposed method provides an extremely powerful tool for the evaluation of TDSE.

关键词： Time-domain analysis Method of moments Finite difference methods Magnetic domains Electromagnetic interference Mathematical models Finite element analysis Discontinuous Galerkin time-domain (DGTD) method local time stepping (LTS) parallel technique time-domain shielding effectiveness (TDSE)

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Adaptive-Compi: Enhancing Mpi-Based Applications' Performance and Scalability by using Adaptive Compression

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INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS 2011年第1期25卷 93-114页

作者： Filgueira, Rosa Singh, David E. Carretero, Jesus Calderon, Alejandro Garcia, Felix Univ Carlos III Madrid Dept Comp Sci Madrid Spain Univ Politecn Madrid Dept Comp Architecture E-28040 Madrid Spain

This paper presents an optimization of MPI communication, called Adaptive-CoMPI, based on runtime compression of MPI messages exchanged by applications. The technique developed can be used for any application, because its implementation is transparent for the user, and integrates different compression algorithms for both MPI collective and point-to-point primitives. Furthermore, compression is turned on and off and the most appropriate compression algorithms are selected at runtime, depending on the characteristics of each message, the network behavior, and compression algorithm behavior, following a runtime adaptive strategy. Our system can be optimized for a specific application, through a guided strategy, to reduce the runtime strategy overhead. Adaptive-CoMPI has been validated using several MPI benchmarks and real HPC applications. Results show that, in most cases, by using adaptive compression, communication time is reduced, enhancing application performance and scalability.

关键词： adaptive system cluster architecture compression algorithm heuristics MPI library parallel technique

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Simulation of free surface flows in a distributed memory environment

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JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS 1999年第1期103卷 77-92页

作者： Cuminato, JA Castelo, A Boaventura, M Tomé, MF USP ICMSC BR-13560970 Sao Carlos SP Brazil UNESP IBILCE BR-15054000 SJ Do Rio Preto SP Brazil Univ Tecn Lisboa Inst Super Tecn P-1096 Lisbon Portugal

A parallel technique, for a distributed memory machine, based on domain decomposition for solving the Navier-Stokes equations in cartesian and cylindrical coordinates in two dimensions with free surfaces is described. It is based on the code by Tome and McKee (J. Comp. Phys. 110 (1994) 171-186) and Tome (Ph.D. Thesis, University of Strathclyde, Glasgow, 1993) which in turn is based on the SMAC method by Amsden and Harlow (Report LA-4370, Los Alamos Scientific Laboratory, 1971), which solves the Navier-Stokes equations in three steps: The momentum and Poisson equations and particle movement, These equations are discretized by explicit and 5-point finite differences. The parallelization is performed by splitting the computation domain into vertical panels and assigning each of these panels to a processor. All the computation can then be performed using nearest neighbour communication. Test runs comparing the performance of the parallel with the serial code, and a discussion of the load balancing question are presented. PVM is used for communication between processes. (C) 1999 Elsevier Science B.V. All rights reserved.

关键词： free surface flow distributed memory parallel technique domain decomposition

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parallel Higher Order DGTD and FETD for Transient Electromagnetic-Circuital-Thermal Co-Simulation

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IEEE TRANSACTIONS ON MICROWAVE THEORY AND techniqueS 2022年第6期70卷 2935-2947页

作者： Zhang, Huan Huan Wang, Pan Pan Jiang, Li Jun Sha, Wei E., I Tong, Mei Song Liu, Ying Wu, Wei Jun Shi, Guang Ming Xidian Univ Natl Key Lab Antennas & Microwave Technol Xian 710071 Peoples R China Univ Hong Kong Dept Elect & Elect Engn Hong Kong Peoples R China Zhejiang Univ Coll Informat Sci & Elect Engn Hangzhou 310058 Peoples R China Tongji Univ Coll Elect & Informat Engn Shanghai 201804 Peoples R China China Ship Dev & Design Ctr Sci & Technol Electromagnet Compatibil Lab Wuhan 430064 Peoples R China Xidian Univ Sch Artificial Intelligence Xian 710071 Peoples R China

A hybrid higher order discontinuous Galerkin time-domain (DGTD) method and finite-element time-domain (FETD) method with parallel technique is proposed for electromagnetic (EM)-circuital-thermal co-simulation in this article. For electromagnetic simulation, DGTD method with higher order hierarchical vector basis functions is used to solve Maxwell equation. Circuit simulation is carried out by modified nodal analysis method. For thermal simulation, FETD method with higher order interpolation scalar basis functions is adopted to solve heat conduction equation. To implement electromagnetic-circuital-thermal co-simulation, the electromagnetic and circuital equations are strongly coupled through voltages, currents, and electric fields at the lumped ports first. Then the electromagnetic and thermal equations are weakly coupled with electromagnetic loss and temperature-dependent medium parameters. Finally, large-scale parallel technique is used to accelerate the process of multiphysics simulation. Numerical results are given to validate the correctness and capability of the proposed electromagnetic-circuital-thermal co-simulation method.

关键词： Electromagnetics Integrated circuit modeling Mathematical models Time-domain analysis Finite element analysis Electromagnetic heating Microwave theory and techniques Discontinuous Galerkin time-domain (DGTD) method electromagnetic (EM)-circuital-thermal co-simulation finite-element time-domain (FETD) method higher order basis functions parallel technique

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UAV path planning in mountain areas based on a hybrid parallel compact arithmetic optimization algorithm

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NEURAL COMPUTING & APPLICATIONS 2023年 1-16页

作者： Wang, Ruo-Bin Wang, Wei-Feng Geng, Fang-Dong Pan, Jeng-Shyang Chu, Shu-Chuan Xu, Lin North China Univ Technol Sch Informat Sci & Technol Beijing 100144 Peoples R China North China Univ Technol Beijing Urban Governance Res Ctr Beijing 100144 Peoples R China Univ South Australia STEM Adelaide 5095 Australia Shandong Univ Sci & Technol Coll Comp Sci & Engn Qingdao 266590 Peoples R China Flinders Univ S Australia Coll Sci & Engn 1284 South Rd Tonsley SA 5042 Australia

Unmanned Aerial Vehicle (UAV) path planning is one of the core components of its entire autonomous control system. The main challenge lies in efficiently obtaining an optimal flight route in complex environments, especially in mountain areas. To address this, we propose a novel version of arithmetic optimization algorithm (AOA), named parallel and compact AOA (PCAOA). In PCAOA, the compact technique can save the memory of UAV and shorten the calculation time, and the parallel technique can quicken the convergence speed and improve the solution accuracy. In addition, the flight path generated by PCAOA is smoothed with cubic B-spline curves, making the path suitable for a UAV. The performance of PCAOA is demonstrated on 23 benchmark functions. Experimental results show that PCAOA achieves competitive results. Finally, the simulation studies are conducted to verify that PCAOA can successfully acquire a feasible and effective route in different mountain areas.

关键词： UAV path planning parallel technique Compact technique Arithmetic optimization algorithm

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