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2015 Computational Electromagnetics International Workshop (CEM)最新文献

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Amplifying the response of a buried object by depositing a passive layer on the ground 通过在地面上沉积一层被动层来放大被埋物体的反应
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237424
C. Valagiannopoulos, N. Tsitsas, A. Sihvola
{"title":"Amplifying the response of a buried object by depositing a passive layer on the ground","authors":"C. Valagiannopoulos, N. Tsitsas, A. Sihvola","doi":"10.1109/CEM.2015.7237424","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237424","url":null,"abstract":"A circular cylindrical perfectly electric conducting inclusion is buried at a certain distance from the surface of the ground. We determine suitable parameters of a thin passive superstrate layer placed atop the ground such that the detectability of the circular inclusion is increased when the configuration is illuminated by a line source. Preliminary numerical results exhibiting the effectiveness of the approach are presented.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134070607","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
Preconditioner for a scattering solver based on the intrusive stochastic galerkin method accelerated with MLFMM 基于入侵随机伽辽金法的MLFMM加速散射解的预调节器
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237417
Z. Zubac, J. Fostier, D. De Zutter, D. Ginste
{"title":"Preconditioner for a scattering solver based on the intrusive stochastic galerkin method accelerated with MLFMM","authors":"Z. Zubac, J. Fostier, D. De Zutter, D. Ginste","doi":"10.1109/CEM.2015.7237417","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237417","url":null,"abstract":"We present a preconditioner for an intrusive stochastic Galerkin method (SGM) based scattering solver that also leverages the multilevel fast multipole method (MLFMM). The proposed preconditioner is essential in developing a general and intrusive SGM method. Simulation results are obtained for a canonical scattering structure with perfect electrically conducting strips with statistically varying geometry. Results are reported for the number of iterations, with and without using a preconditioner, and for the time required to setup the preconditioner.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122841918","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
Massive computation of singular values of small matrices on GPUs gpu上小矩阵奇异值的大量计算
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237428
A. Capozzoli, C. Curcio, Salvatore Di Donna, A. Liseno
{"title":"Massive computation of singular values of small matrices on GPUs","authors":"A. Capozzoli, C. Curcio, Salvatore Di Donna, A. Liseno","doi":"10.1109/CEM.2015.7237428","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237428","url":null,"abstract":"This paper presents a fast and robust approach to evaluate the singular values of a very large number of small matrices on GPUs. The timings and the accuracy obtained are compared to those achieved by \"state-of-the-art\" libraries. The results show that, by suitably tuning the trade-off between computational speed and accuracy, a reasonable speedup over a fast multi-core CPU is possible.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"19 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131290426","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
Leveraging prior state in 3-D full-wave RF imaging via Levenberg-Marquardt algorithm 利用Levenberg-Marquardt算法在三维全波射频成像中的先验状态
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237443
H. Muniganti, D. Gope
{"title":"Leveraging prior state in 3-D full-wave RF imaging via Levenberg-Marquardt algorithm","authors":"H. Muniganti, D. Gope","doi":"10.1109/CEM.2015.7237443","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237443","url":null,"abstract":"Sensitivity of initial guess while using Levenberg- Marquardt algorithm in solving the inverse problem for 3-D radio frequency (RF) imaging is studied. It is shown that the prior state as initial guess can be leveraged for a personal device to detect and monitor breast health.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128092158","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 simple and robust technique to retrieve effective refractive index of heterogeneous dielectrics for millimeter-wave applications 一种简单可靠的毫米波非均质介质有效折射率反演技术
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237420
Abdul Aziz, L. Matekovits, A. De Sabata
{"title":"A simple and robust technique to retrieve effective refractive index of heterogeneous dielectrics for millimeter-wave applications","authors":"Abdul Aziz, L. Matekovits, A. De Sabata","doi":"10.1109/CEM.2015.7237420","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237420","url":null,"abstract":"In this paper a simple methodology to retrieve the effective refractive index of a heterogeneous dielectric substrate is proposed. The host dielectric material is filled with small spherical dielectric inclusions which are arranged in a cubic lattice to form a heterogeneous dielectric. The proposed technique relies on the determination of the dispersion diagram (DD) of a unit cell that consists of a dielectric cube with a dielectric spherical inclusion at its center. The inhomogeneous substrate results from a 3D periodic repetition of the unit cell. Since only waves those propagate parallel to one of the faces of the unit cell are considered, the DD is 2D. The DD is then restricted to the ΓXMΓ spectral triangle that borders the irreducible first Brillouin zone, due to the symmetry of the structure. The effective refractive index can readily be determined through the slope of the DD, without using scattering parameters.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132877674","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
Micro-doppler radar for human breathing and heartbeat detection 用于人体呼吸和心跳检测的微型多普勒雷达
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237422
İsmail Ŗişman, Anıl Onur Canbaz, K. Yeğin
{"title":"Micro-doppler radar for human breathing and heartbeat detection","authors":"İsmail Ŗişman, Anıl Onur Canbaz, K. Yeğin","doi":"10.1109/CEM.2015.7237422","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237422","url":null,"abstract":"Detection of live-human presence under the debris is a critical problem especially after natural disasters such as earthquakes and landslides. If a radar system can detect breathing and heartbeats, it would be invaluable and preferable to existing acoustic or ultrasound based systems. Human breathing and heartbeats have very low frequency components and their detection in the presence of noise pose a great challenge for researchers. In this study, we first analyzed the radar parameters for such detection, built a system prototype based on continuous-wave Doppler radar, and tested on human subjects behind concrete walls. Our zero-intermediate-frequency receiver system was able to detect breathing and heart pulses from a 40 cm stand-off distance, behind a 25 cm thick-concrete wall using 7 dBm (5 mW) transmit power.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132973654","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: 6
Lumped-element modeling of millimeter-wave HEMT parasitics via full-wave electromagnetic analysis 基于全波电磁分析的毫米波HEMT寄生集总元建模
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237434
Y. Karisan, C. Caglayan, G. Trichopoulos, K. Sertel
{"title":"Lumped-element modeling of millimeter-wave HEMT parasitics via full-wave electromagnetic analysis","authors":"Y. Karisan, C. Caglayan, G. Trichopoulos, K. Sertel","doi":"10.1109/CEM.2015.7237434","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237434","url":null,"abstract":"We present a broadband lumped-element parasitic equivalent circuit extraction procedure based on full-wave modeling of electromagnetic interactions within the pad layout of millimeter-wave high electron mobility transistors (HEMTs). The proposed method is illustrated using a conventional two-finger HEMT topology within a coplanar waveguide environment. The accuracy of the suggested extraction procedure is validated through extensive comparisons between full-wave electromagnetic simulations, and the computed response of the proposed model up to 325 GHz. For the first time, we develop a systematic parameter extraction algorithm for differential device configurations.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121866615","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
Multilevel inverse-based factorization preconditioner for solving sparse linear systems in electromagnetics 求解电磁学稀疏线性系统的多电平逆分解预调节器
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237411
Yiming Bu, B. Carpentieri, Zhao-Li Shen, Ting-Zhu Huang
{"title":"Multilevel inverse-based factorization preconditioner for solving sparse linear systems in electromagnetics","authors":"Yiming Bu, B. Carpentieri, Zhao-Li Shen, Ting-Zhu Huang","doi":"10.1109/CEM.2015.7237411","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237411","url":null,"abstract":"We introduce an algebraic recursive multilevel approximate inverse-based preconditioner, based on a distributed Schur complement formulation. The proposed preconditioner combines recursive combinatorial algorithms and multilevel mechanisms to maximize sparsity during the facorization. Experiments on selected sparse linear systems from electromagnetics applications demonstrate the potential of the proposed method, also against other state-of-the-art solvers.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133691998","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
Imaging multiple objects with time-reversed FDTD method at microwave range 微波波段时域有限差分法多目标成像
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237444
C. Bardak, M. Saed, S. Taskin
{"title":"Imaging multiple objects with time-reversed FDTD method at microwave range","authors":"C. Bardak, M. Saed, S. Taskin","doi":"10.1109/CEM.2015.7237444","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237444","url":null,"abstract":"A simulation technique is presented for imaging multiple objects in microwave region. The proposed technique is based on the time-reversed finite-difference time-domain method (FDTD-TR) in three dimensions. Using this technique, not only the locations of objects but also their detailed images can be obtained. The method is capable of imaging hidden objects with transmission as well as reflection imaging modalities in the nearfield and far-field. The proposed technique is computationally efficient due to using a much smaller data set compared to conventional FDTD-TR imaging techniques where the entire time span of the captured data is reversed. The method was validated using experimental results as well as simulations.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"264 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114234501","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
Transitioning HPC software to exascale heterogeneous computing 将HPC软件过渡到百亿亿次异构计算
2015 Computational Electromagnetics International Workshop (CEM) Pub Date : 2015-07-01 DOI: 10.1109/CEM.2015.7237412
Wen-mei W. Hwu, Li-Wen Chang, Heehoon Kim, Abdul Dakkak, Izzat El Hajj
{"title":"Transitioning HPC software to exascale heterogeneous computing","authors":"Wen-mei W. Hwu, Li-Wen Chang, Heehoon Kim, Abdul Dakkak, Izzat El Hajj","doi":"10.1109/CEM.2015.7237412","DOIUrl":"https://doi.org/10.1109/CEM.2015.7237412","url":null,"abstract":"An increasing portion of the top supercomputers in the world, including Blue Waters, have heterogeneous CPUGPU computational units. As we move towards exascale, we can expect even more pervasive deployment of heterogeneous computational units. While a handful of science teams can already use heterogeneous computational units in their production applications, there is still significant room for the growing use. This paper presents the current state and projected path for transitioning software into this new paradigm. We first summarize the currently practical languages such as OpenCL, OpenACC, and C++AMP, in increasing levels of productivity, highlighting their recent advancements in supporting performance portability and maintainability. We will then give a brief overview of some emerging programming systems such as TANGRAM and Troilet that are designed to further enhance developer productivity for heterogeneous computing.","PeriodicalId":409699,"journal":{"name":"2015 Computational Electromagnetics International Workshop (CEM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120968680","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: 6
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