IEEE Journal on Multiscale and Multiphysics Computational Techniques最新文献_第8页

Multiphysics Computing of Challenging Antenna Arrays Under a Supercomputer Framework 在超级计算机框架下挑战性天线阵列的多物理场计算

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-03-10 DOI: 10.1109/JMMCT.2023.3254661

Hao-Xuan Zhang;Qiwei Zhan;Li Huang;Da-Wei Wang;Yin-Da Wang;Wei-Jie Wang;Zhen-Guo Zhao;Hai-Jing Zhou;Kai Kang;Liang Zhou;Wen-Yan Yin

{"title":"Multiphysics Computing of Challenging Antenna Arrays Under a Supercomputer Framework","authors":"Hao-Xuan Zhang;Qiwei Zhan;Li Huang;Da-Wei Wang;Yin-Da Wang;Wei-Jie Wang;Zhen-Guo Zhao;Hai-Jing Zhou;Kai Kang;Liang Zhou;Wen-Yan Yin","doi":"10.1109/JMMCT.2023.3254661","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3254661","url":null,"abstract":"A parallel multiphysics simulation solver is developed to solve electromagnetic-thermal-mechanical coupling for some challenging large-scale antenna arrays. To achieve high scalability of supercomputer architectures, we reconstruct the preconditioned BiCGSTAB method and the non-overlapping domain decomposition method, so that the most resource-intensive matrix factorization steps can be performed in parallel independently within subdomains. The electromagnetic and thermal fields are solved separately, while coupled through the dissipated power and the temperature-dependent material parameters; after thermal steady state is reached, the mechanical simulation is stimulated subject to the temperature rise. The accuracy of electromagnetic-thermal coupling and thermal stress solution are first validated, and then the strong/weak parallel scalability experiments of the developed multiphysics solver are performed on supercomputer. Finally, an extremely challenging antenna array is simulated using the proposed solver, where to our best knowledge we bring the scale of multiphysics simulations excited by frequency-domain electromagnetic fields to the order of billion unknowns for the first time.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"165-177"},"PeriodicalIF":2.3,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Investigating the Scattering Characteristics of Artificial Field-Aligned Irregularities Based on T-Matrix Algorithm 基于t矩阵算法的人工场对准不规则体散射特性研究

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-03-03 DOI: 10.1109/JMMCT.2023.3252053

Shuai S. A. Yuan;Zhu Hong Lin;Li-Bin Lv;Shu-Ji Hao;Wei E. I. Sha

{"title":"Investigating the Scattering Characteristics of Artificial Field-Aligned Irregularities Based on T-Matrix Algorithm","authors":"Shuai S. A. Yuan;Zhu Hong Lin;Li-Bin Lv;Shu-Ji Hao;Wei E. I. Sha","doi":"10.1109/JMMCT.2023.3252053","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3252053","url":null,"abstract":"The artificial field-aligned irregularity (AFAI) in ionosphere can be generated by heating the ionosphere with high-power high-frequency radio waves, and the physical structures of AFAIs are modeled as elongated multiple multilayer plasma cylinders. At relatively low frequencies, AFAIs could work as natural reflectors for long-distance communications. In order to evaluate the performance of AFAI-based communications, it is crucial to obtain the objective radar cross section (RCS) of AFAIs quickly and accurately. On account of the large electrical size of AFAIs, it would be time-consuming to calculate the objective RCS by full-wave simulations, meanwhile, the accuracies of the existing approximated methods are limited in many scenarios. In this paper, the T-matrix algorithm is used for analytically calculating the objective RCS of AFAIs after making reasonable approximations. Compared to the results obtained from full-wave simulations, the errors of objective RCS are within an acceptable range while the computation time is largely reduced. Furthermore, the scattering characteristics of AFAIs at different frequencies are investigated. The proposed method could be readily implemented for investigating and predicting the performance of AFAI-based long-wave communications.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"147-157"},"PeriodicalIF":2.3,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Method of Characteristic Modes Analysis and Manipulation for Antenna Design by Using Generalized Partial Element Equivalent Circuit 基于广义部分单元等效电路的天线设计特征模态分析与处理方法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-02-06 DOI: 10.1109/JMMCT.2023.3242714

Yuhang Dou;Hao Chen

{"title":"Method of Characteristic Modes Analysis and Manipulation for Antenna Design by Using Generalized Partial Element Equivalent Circuit","authors":"Yuhang Dou;Hao Chen","doi":"10.1109/JMMCT.2023.3242714","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3242714","url":null,"abstract":"A method of analyzing characteristic modes (CMs) of antennas with multiple lumped \u0000<italic>LC</i>\u0000 loads is proposed based on the full-wave generalized partial element equivalent circuit (GPEEC) model. Different with traditional CMs analysis methods, this method can be integrated into an optimization algorithm. With this powerful engine, we can develop a systematic method to manipulate radiation CMs of a mobile terminal while preserving its aesthetic structure features of the industrial design. This method can reveal all possible radiation structure performances as traditional methods and even create new possible radiation modes to improve antenna performance. With the GPEEC model, a comprehensive analysis of antennas can be achieved simultaneously, including but not limited to simulating time-/frequency-domain responses, evaluating radiation efficiency contributed by the self- and mutual radiated power separately, and plotting current and field distribution. Three design examples are demonstrated, including analyzing the working mechanism of the self-curing decoupling technique for mobile terminals from the view of CMs, extending the bandwidth of an antenna in LTE-A low-frequency bands, and creating a pair of MIMO antennas in the low LTE-A bands. These examples are verified theoretically and experimentally, showing the high potential of this method in analyzing and designing antennas for mobile terminals.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"123-134"},"PeriodicalIF":2.3,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Predicting Output Responses of Nonlinear Dynamical Systems With Parametrized Inputs Using LSTM 基于LSTM的参数化非线性动力系统输出响应预测

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-02-03 DOI: 10.1109/JMMCT.2023.3242044

Lihong Feng

{"title":"Predicting Output Responses of Nonlinear Dynamical Systems With Parametrized Inputs Using LSTM","authors":"Lihong Feng","doi":"10.1109/JMMCT.2023.3242044","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3242044","url":null,"abstract":"Long Short-Term Memory (LSTM) has been more and more used to predict time evolution of dynamics for many problems, especially the fluid dynamics. Usually, it is applied to the latent space after dimension reduction of the full dynamical system by proper orthogonal decomposition (POD), autoencoder (AE) or convolutional autoencoder (CAE). In this work, we propose to directly apply LSTM to the data of the output without dimension reduction for output response prediction. The dimension of the output is usually small, and no dimension reduction is necessary, thus no accuracy loss is caused by dimension reduction. Based on the standard LSTM structure, we propose an LSTM network with modified activation functions which is shown to be much more robust for predicting periodic waveforms. We are especially interested in showing the efficiency of LSTM for predicting the output responses corresponding to time-vary input signals, which is rarely considered in the literature. However, such systems are of great interests in electrical engineering, mechanical engineering, and control engineering, etc. Numerical results for models from circuit simulation, neuron science and a electrochemical reaction have shown the efficiency of LSTM in predicting the dynamics of output responses.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"97-107"},"PeriodicalIF":2.3,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Simulation of Thin-Film Cells With a Multiscale Quantum-Mechanical/Electromagnetic Method 薄膜电池的多尺度量子力学/电磁法模拟

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-02-02 DOI: 10.1109/JMMCT.2023.3241633

Lei Zhang;Hui Zeng;Zhenhong Fan;Da-Zhi Ding

{"title":"Simulation of Thin-Film Cells With a Multiscale Quantum-Mechanical/Electromagnetic Method","authors":"Lei Zhang;Hui Zeng;Zhenhong Fan;Da-Zhi Ding","doi":"10.1109/JMMCT.2023.3241633","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3241633","url":null,"abstract":"This article studies the surface plasmon-enhanced effect of metal nanoparticles (NPs) in thin-film cells by using a semi-classical multiscale quantum-mechanical/electromagnetic (QM/EM) method. The QM/EM method establishes a relationship between classical electromagnetic environment and full quantum-mechanical photovoltaics with quantized vector magnetic potential on the boundary. In our theoretical framework, the EM region is solved by Maxwell equation with method of moments (MoM), and the QM region is solved by density-functional tight-binding (DFTB) theory with the nonequilibrium Green's function. The proposed method has predicted that metal NPs could generate surface plasmon enhancement and substantially improve the photovoltaic performance of thin-film cells. By comparison, we investigated the influences of different NP materials, distributions and drop-casting ratios on the current-voltage characteristics. The simulated results provide a comprehensive understanding of photoelectric interaction, which can be utilized to improve the power conversion efficiency (PCE) of thin-film cells by fast optimization design.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"71-81"},"PeriodicalIF":2.3,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49981636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A TF/SF Plane Wave Source Condition for the Constraint-Preserving FVTD Method 保约束FVTD方法的TF/SF平面波源条件

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-01-31 DOI: 10.1109/JMMCT.2023.3241190

Kaiser Niknam;Jamesina J. Simpson

引用次数: 0

Deep-Learning-Based Metasurface Design Method Considering Near-Field Couplings 考虑近场耦合的基于深度学习的元表面设计方法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-01-17 DOI: 10.1109/JMMCT.2023.3237699

Mengmeng Li;Yuchenxi Zhang;Zixuan Ma

引用次数: 2

Electromagnetic-Thermal Analysis With FDTD and Physics-Informed Neural Networks 利用FDTD和物理信息神经网络进行电磁热分析

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-01-13 DOI: 10.1109/JMMCT.2023.3236946

Shutong Qi;Costas D. Sarris

引用次数: 2

Split-Field Domain Decomposition Parallel Algorithm With Fast Convergence for Electromagnetic Analysis 一种快速收敛的电磁分析分域分解并行算法

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-01-12 DOI: 10.1109/JMMCT.2023.3236645

Shuzhan Sun;Dan Jiao

引用次数: 0

Numerical Study of the Optical Response of $text{ITO}$-${text{In}_{{2}}{text O}_{{3}}}$ Core-Shell Nanocrystals for Multispectral Electromagnetic Shielding 多光谱电磁屏蔽中$text{ITO}$-${text{In}_{{2}}{text O}_{{3}}}$核壳纳米晶体光响应的数值研究

IF 2.3

IEEE Journal on Multiscale and Multiphysics Computational Techniques Pub Date : 2023-01-10 DOI: 10.1109/JMMCT.2023.3235750

Nicola Curreli;Matteo Bruno Lodi;Michele Ghini;Nicolò Petrini;Andrea Buono;Maurizio Migliaccio;Alessandro Fanti;Ilka Kriegel;Giuseppe Mazzarella

{"title":"Numerical Study of the Optical Response of $text{ITO}$-${text{In}_{{2}}{text O}_{{3}}}$ Core-Shell Nanocrystals for Multispectral Electromagnetic Shielding","authors":"Nicola Curreli;Matteo Bruno Lodi;Michele Ghini;Nicolò Petrini;Andrea Buono;Maurizio Migliaccio;Alessandro Fanti;Ilka Kriegel;Giuseppe Mazzarella","doi":"10.1109/JMMCT.2023.3235750","DOIUrl":"https://doi.org/10.1109/JMMCT.2023.3235750","url":null,"abstract":"Nowadays, materials to protect equipment from unwanted multispectral electromagnetic waves are needed in a broad range of applications including electronics, medical, military and aerospace. However, the shielding materials currently in use are bulky and work effectively only in a limited frequency range. Therefore, nanostructured materials are under investigation by the relevant scientific community. In this framework, the design of multispectral shielding nanomaterials must be supplemented with proper numerical models that allow dealing with non-linearities and being effective in predicting their absorption spectra. In this study, the electromagnetic response of metal-oxide nanocrystals with multispectral electromagnetic shielding capability has been investigated. A numerical framework was developed to predict energy bands and electron density profiles of a core-shell nanocrystal and to evaluate its optical response at different wavelengths. To this aim, a finite element method software is used to solve a non-linear Poisson's equation. The numerical simulations allowed to model the optical response of \u0000<inline-formula><tex-math>$mathbf {ITO}$</tex-math></inline-formula>\u0000-\u0000<inline-formula><tex-math>$mathbf {In_{2}O_{3}}$</tex-math></inline-formula>\u0000 core-shell nanocrystals and can be effectively applied to different nanotopologies to support an enhanced design of nanomaterials with multispectral shielding capabilities.","PeriodicalId":52176,"journal":{"name":"IEEE Journal on Multiscale and Multiphysics Computational Techniques","volume":"8 ","pages":"60-70"},"PeriodicalIF":2.3,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/7274859/10003074/10013664.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49962821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0