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International Workshop on Metamaterials

作者： Yongjun Huang Guangjun Wen Weiren Zhu School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu China Advanced Computing and Simulation Laboratory (AxL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

The research of metamaterial is one of most important global activity that promises to change the lives in many different ways. Flexibly controlling the properties of metamaterials by tunable designs makes metamaterials more colorful and thus enables a family of new electromagnetic devices. In this paper, the use of ferrites on design of tunable metamaterials has been reviewed. Owing to the novel properties of ferrites, including broadband negative permeability and tunability of permeability, a great many researchers have focused on investigating ferrites based metamaterials and the relevant applications. This paper reviews the design, theoretical analysis, numerical and experimental demonstrations, and the potential applications of the ferrite based metamaterials.

关键词： Metamaterials Ferrites Wires Permeability Magnetic resonance Helium

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On Load Balancing of Hybrid OpenCL/Global Arrays Applications on Heterogeneous Platforms

On Load Balancing of Hybrid OpenCL/Global Arrays Application...

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International Conference on Electrical Engineering/Electronics, computer, Telecommunications and Information technology

作者： Ekasit Kijsipongse Suriya U-ruekolan Large-Scale Simulation Research Laboratory National Electronics and Computer Technology Center (NECTEC) 112 Thailand Science Park Pahon Yothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand

ISBN: (纸本)9781467320269

In the recent years, high performance computing (HPC) resources has grown up rapidly and diversely. The next generation of HPC platforms is assembled from resources of various types such as multi-core CPUs and GPUs. Thus, the development of a parallel program to fully utilize heterogeneously distributed resources in HPC environment is a challenge. A parallel program should be portable and able to run efficiently on all types of computing resources with the least effort. We combine the advantages of Global Arrays and OpenCL for such the parallel programs. We employ the OpenCL in implementing parallel applications at fine-grain level so that they can execute across heterogeneous platforms. At coarse grain level, we utilize the Global Arrays for efficient data communication between computing resources in terms of virtually shared memory. In addition, we also propose a load balancing technique based on the task pool model for hybrid OpenCL/Global Arrays applications on heterogeneous platforms to improve the performance of the applications.

关键词： Balancing Applications Heterogeneous

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Design and Assembly of a Double-Sided 3D Package with a Controller and a DRAM Stack

Design and Assembly of a Double-Sided 3D Package with a Cont...

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IEEE Electronic Components and technology Conference

作者： Xi Liu Ming Li Don Mullen Julia Cline Suresh K. Sitaraman Computer Aided Simulation for Packaging Reliability Laboratory (CASPaR) The George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA USA RAMBUS Inc. Sunnyvale CA USA

The microelectronic packaging field is moving into the third dimension for miniaturization, low power consumption, and better performance. In this paper, we present a double- sided flip-chip organic substrate with a memory controller on one side of the package, and 3D stacked disaggregated memory chips on the other side of the package. This design allows the controller to interface with the DRAM stack directly through the substrate providing the shortest possible interconnect path, and thus achieving the fastest signaling speed. However, this double-sided flip chip on organic substrate also causes yield, assembly, test, and reliability challenges. In order to optimize the assembly process, a sequential 3D finite-element model was developed to simulate the package assembly process. In these simulations, various assembly process sequences were simulated with different conditions and materials. In addition, a probing test model was also built to study the connectivity of the Land Grid Array (LGA) pin array with the PCB sockets. Results show that the careful selection of assembly steps and package materials are crucial for the successful package assembly and also important for the probing test.

关键词： Double-Sided 3D Controller

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An unstructured normal mode decomposition solver on real ocean topography for the analysis of storm tide hazard

An unstructured normal mode decomposition solver on real oce...

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OCEANS - Europe

作者： Sirod Sirisup Asanobu Kitamoto Large-Scale Simulation Research Laboratory National Electronics and Computer Technology Center Klong Luang Pathum Thani Thailand Digital Content and Media Sciences Research Division National Institute of Information Chiyoda Tokyo Japan

In this study, we have developed an unstructured normal mode decomposition solver based on the finite element method for the purpose of normal mode analysis on natural basins. The normal mode analysis can be used to provide the site-specific storm hazard summary such as storm risk for a given basin. This information can provide a useful guideline during the storm events. The analysis of the two past storm events using the normal modes derived from the solver has been demonstrated in two different locations. The first event is tropical cyclone Linda (1997) in the Gulf of Thailand and the second one is tropical cyclone Melor (2009) in the Ise Bay, Japan. The analysis reveals a relation of the storm forward speed and the storm path to the spatial distribution of leading normal modes. We believe that our results can be used for the analysis of past storm events, and may be applied to future storm events.

关键词： Storms Tropical cyclones Eigenvalues and eigenfunctions Mathematical model Equations Tides Sea measurements

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Tunable ferrite based triple-band μ-negative metamaterial

Tunable ferrite based triple-band μ-negative metamaterial

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Haibin Sun Guangjun Wen Yongjun Huang Jingping Zhong Weiren Zhu Key Laboratory of Broadband Optical Fiber Transmission & Communication Networks School of Communication and Information Engineering University of Electronic Science and Technology Chengdu China Advanced Computing and Simulation Laboratory (AxL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

We present a tunable triple-band μ-negative metamaterial composed of loop resonator and ferrite. The tunable triple-band-stop transmission spectrum of such metamaterial is investigated numerically by full wave simulations. Moreover, the corresponding effective parameters are retrieved to illustrate the tunable μ-negative characteristic.

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Systematic method for modeling and designing of an optofluidic sensor to measure the pressure and flow rate

Systematic method for modeling and designing of an optofluid...

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Iranian Conference on Electrical Engineering (ICEE)

作者： M. Mansuri M. Ebnali-Heidari S. Mokhtarian M. K. Moravvej-Farshi Department of Electrical Engineering Islamic Azad University Najafabad Iran Faculty of Engineering University of Shahrekord Shahrekord Iran Department of mechanical engineering Isfahan University of technology Isfahan Iran Faculty of Electrical and Computer Engineering Advanced Devices Simulation Laboratory Tarbiat Moalem University Tehran Iran

In this paper, we present a new method for designing an optofluidic interferometric sensor to measure the pressure and flow rate based on generated optical ring pattern. This sensor consists of a flexible air gap optical cavity whose curvature depends on the pressure. When illuminated by a monochromatic light, the curved surface generates the interference patterns. In our numerical simulations, we take the effects of fluid flow rate, solid deformation, and the light interference into account. We use the beam propagation method (BPM) for simulating the optics and the finite element method (FEM) for simulating the mechanics. This pressure sensor was demonstrated in the working range of 0-60Pa at the constant temperature of 20 C.

关键词： Optics Fluids Indexes Ethanol Glass

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Analysis of Thermoelectric Generator by Finite Element Method

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Procedia Engineering 2012年 32卷 1006-1011页

作者： T. Seetawan U. Seetawan A. Ratchasin S. Srichai K. Singsoog W. Namhongsa C. Ruttanapun S. Siridejachai Thermoelectrics Research Center Faculty of Science and Technology Sakhon Nakon Rajabhat University 680 Nittayo Road Muang District Sakhon Nakon 47000 Thailand Thatnaraiwittaya School 606 Nittayo Rd. Sakon Nakhon 47000 Thailand Large-Scale Simulation Research Laboratory (LSR) National Electronics and Computer Technology Center (NECTEC)112 Thailand Science Park Pahon Yothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand

This paper focuses on designing thermoelectric generator (TEG) via numerical method. Thermoelectric module in this study was made from n-type CaMnO3 and p-type Ca3Co4O9. The couple field equations were formulated into a system of algebraic equations by means of finite element method (FEM). The simulation procedure was verified by comparing with experimental results, which showed a very good agreement between the two outcomes. The parametric design exhibited that output voltages vary linearly with height of TEG, until reaching some limiting value, the linear relationship was terminated. After that specific height, increasing the height of TEG no longer gains notable output voltage.

关键词： Thermoelectric generator finite element method numerical simulation geometric design

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A terrain matching method for irregular military symbols based on the simplification of control points

A terrain matching method for irregular military symbols bas...

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International Workshop on Digital Media and Digital Content Management, DMDCM 2011

作者： Li, Fengxia Zhang, Qingyi Jie, Fei Beijing Key Laboratory of Digital Performance and Simulation Technology School of Computer Science and Technology Beijing Institute of Technology Beijing 100081 China

ISBN: (纸本)9780769544137

To realize the real-time rendering for regular and irregular military symbols, it proposed a terrain matching method based on the simplification of control points. The elevation values of the irregular military symbols were obtained primarily in the method. Then the elevation curve was differentiated and smoothed for times. And the final control points were obtained after the merging the initial control points. The corresponding three-dimensional model was generated after plotting on two-dimensional electronic map with the method. Experimental results showed that the model could guarantee real-time matching and obtain better matching results. The military symbols reflected terrain undulation well, thus displayed information of battlefield situation more precisely. © 2011 IEEE.

关键词： Arrays Equations Mathematical model Merging Military computing Process control Solid modeling collision detection irregular military symbols terrain matching

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A Bayes thresholding method based on edge protection strategies

A Bayes thresholding method based on edge protection strateg...

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2nd International Conference on Multimedia technology, ICMT 2011

作者： Zhang, Zhenhua Zhang, Yuxin Pan, Yang Xiao, Linchang College of Computer Science and Technology State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China

ISBN: (纸本)9781612847740

In this paper, several image denoising methods of protecting edges of images are introduced and the shortcomings of these algorithms are analyzed. A novel high-frequency edge detection method is proposed based on Inter Correlation of Wavelet Coefficients at Finer Scales and the distribution of wavelet coefficients. The experimental results and analysis are given here. The experimental results show that the proposed method has higher PSNR than the traditional method Bayes threshold denoising does. © 2011 IEEE.

关键词： Wavelet transforms

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Efficient large Pearson correlation matrix computing using hybrid MPI/CUDA

Efficient large Pearson correlation matrix computing using h...

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International Joint Conference on computer Science and Software Engineering

作者： Kijsipongse, Ekasit U-Ruekolan, Suriya Ngamphiw, Chumpol Tongsima, Sissades Large Scale Simulation Research Laboratory National Electronics and Computer Technology Center Pathumthani Thailand Biostatistics and Informatics Laboratory Genome Institute National Center for Genetic Engineering and Biotechnology Pathumthani Thailand

ISBN: (纸本)9781457706875

The calculation of pairwise correlation coefficient on a dataset, known as the correlation matrix, is often used in data analysis, signal processing, pattern recognition, image processing, and bioinformatics. With the state-of-the-art Graphic Processing Units (GPUs) that consist of massive cores capable to do processing up to several Gflops, the calculation of correlation matrix can be accelerated several times over traditional CPUs. However, due to the rapid growth of the data in the digital era, the correlation matrix calculation becomes computing intensive which needs to be executed on multiple GPUs. As of now, GPUs are common components in data center at many institutions. Their GPU deployment tends towards a GPU cluster which each node is equipped with GPUs. In this paper, we propose a parallel computing based on the hybrid MPI/CUDA programming for fast and efficient Pearson correlation matrix calculation on GPU clusters. At coarse grain parallelism, the correlation matrix is partitioned into tiles which are distributed to execute concurrently on many GPUs using MPI. At fine grain level, the CUDA kernel function on each node performs massively parallel computing on a GPU. To balance load across all GPUs, we adopt the work pool model which there is a master node that manages tasks in the work pool and dynamically assign tasks to worker nodes. The result of the evaluation shows that the proposed work can ensure the load balance across different GPUs and thus gives better execution time than using a simple static data partitioning. © 2011 IEEE.

关键词： Graphics processing unit

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