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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Deo Prakash Vidyarthi Anil Kumar Tripathi B.K. Sarker Abhishek Dhawan Department of Computer Science Banaras Hindu University India Department of Computer Engineering I.T Banaras Hindu University Varanasi India Department of Computer and Systems Engineering Kobe University Kobe Japan Department of Computer Applications Cochin University Cochin India

Summary form only given. Most of the task allocation models & algorithms in distributed computing system (DCS) require a priori knowledge of its execution time on the processing nodes. Since the task assignment is not known in advance, this time is quite difficult to estimate. We propose a cluster-based dynamic allocation scheme, in a distributed computing system, which eliminate this time requirement. Further, as opposed to a single task allocation, generally proposed in most of the models, we consider multiple tasks. A fuzzy function is used for both the module clustering and processor clustering. Dynamic invocation of clustering and assignment is considered. Experimental results show the efficacy of the proposed model.

关键词： Distributed computing Distributed control Clustering algorithms Scalability computer science Systems engineering and theory computer applications Concurrent computing computer networks Processor scheduling

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Development of a MEMS-based gate to enhance cold-cathode electron field emission for space applications

Development of a MEMS-based gate to enhance cold-cathode ele...

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International Conference on Vacuum Nanoelectronics (IVNC)

作者： H.R. Goldberg P.A. Encarnacion B.E. Gilchrist R. Clarke D.P. Morris J.L. Van Noord Electrical Engineering and Computer Science Department University of Michigan Ann Arbor MI USA Electrical Engineering and Computer Science Department University of Michigan Department of Physics University of Michigan Department of Physics University of Michigan Ann Arbor MI USA ElectroDynamic Applications Inc. Ann Arbor MI USA

A gated structure of arrays of micron-sized holes has been developed at the University of Michigan. The structure can be positioned atop any uniformly structured planar emitting surface and biased to effect electron emission. The structure is designed to be compatible with a variety of emission surface technologies such as thin films (e.g., boron nitride), carbon nanotubes, and self-assembled nanostructures.

关键词： Electron emission Etching Boron Dielectrics Silicon Application software Transistors Fabrication Nanostructures Plasmas

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REASONING ABOUT FUNCTIONALITY OF CORE MATCHING FUNCTIONS FOR INFORMATION RETRIEVAL

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International Journal of Wavelets, Multiresolution and Information Processing 2004年第2期2卷 207-216页

作者： JIAN PING LI DAWEI SONG YONG QIN YANG YUAN YAN TANG International Centre for Wavelet Analysis and Its Applications Logistical Engineering University Chongqing 400016 P. R. China Department of Computer Science Chinese University of Hong Kong Hong Kong China Chongqing Jiaotong University Chongqing 400074 P. R. China Hong Kong Baptist University Hong Kong China

Traditional benchmarking methods for information retrieval (IR) are based on experimental performance evaluation. 1–14 Although the metrics precision and recall can measure the effectiveness of a system, it cannot assess the underlying model. Recently, a theory of "aboutness" has been used for functional benchmarking of IR. Latest research shows that the functionality of an IR model is largely determined by its retrieval mechanism, i.e. the matching function. In particular, containment and overlapping (either with or without a threshold value) are the core IR matching functions. The objective of this paper is to model the containment and overlapping matching functions using an aboutness-based framework and analyze them from an abstract and theoretical viewpoint. Separate aboutness relations for containment, pure-overlapping (i.e. without threshold) and threshold-overlapping matching functions are defined, and the sets of properties supported by them are derived and analyzed respectively. These three relations can be used to determine and explain the functionality of an IR system and how the functionality affects the performance of the system. Moreover, they can provide the design guidelines for new IR systems.

关键词： Intelligent information retrieval functional benchmarking of IR models reasoning about functionality

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Field emission of nanostructured boron nitride thin films in the presence of residual gases

Field emission of nanostructured boron nitride thin films in...

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International Conference on Vacuum Nanoelectronics (IVNC)

作者： P.A. Encarnacio H.R. Goldberg C.A. Deline B.E. Gilchrist J.L. Van Noord R. Clarke Dept. of Phys. Michigan Univ. Ann Arbor MI USA Electrical Engineering and Computer Science Department The University of Michigan Ann Arbor MI USA ElectroDynamic Applications Inc. Ann Arbor MI USA Department of Physics The University of Michigan Ann Arbor MI USA

In this paper, field emission was measured in varying atmospheres of different gases, from an on-going study of thin films of polycrystalline boron nitride (BN). The initial results indicate that the nanostructured BN surface exhibit robust emission characteristics in the presence of residual gases such as oxygen, xenon, water vapor, and nitrogen. Also, no permanent effect on the emission characteristics was observed from the exposure of the films to the gas.

关键词： Boron Transistors Gases Surface morphology Nanostructures Sputtering Atomic force microscopy Scanning electron microscopy Application software Nanostructured materials

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STUDY ON RECURSIVE CONSTRUCTION METHOD OF BIORTHOGONAL WAVELETS FOR SIGNAL PROCESSING

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International Journal of Wavelets, Multiresolution and Information Processing 2004年第2期2卷 197-206页

作者： ZHONGHONG YAN JIAN PING LI YONG QIN YANG YUAN YAN TANG Department of Bioengineering Chongqing Institute of Technology Chongqing 400050 P. R. China International Centre for Wavelet Analysis and Its Applications Logistical Engineering University Chongqing 400016 P. R. China Chongqing Jiaotong University Chongqing 400074 P. R. China Department of Computer Science Hong Kong Baptist University Hong Kong China

Wavelet has been applying in signal analyzing, image processing model recognizing, computer sense etc. But among them biorthogonal wavelets with symmetry characteristics (or antisymmetry) in the image compressing, signal examination has more special functions, this paper research a recursive construction method, at the same time, It is valuable to notice that our recursive methods are not the same as the W. Seldens's lifting scheme, the new technique has important mean to adaptive signal processing and more application: such as for QMF•CQF etc. filters. It is very easy to choose the wavelet bases match to questions by dynamically.

关键词： Signal processing recursive construction wavelets filter wavelets applications

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Fingerprint matching using recurrent autoassociative memory

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International Journal of Neural Systems 2003年第4期13.0卷 263-271页

作者： Poorna, B. Easwarakumar, K.S. Department of Computer Applications Dr. M.G.R. Engineering College Maduravoyal Chennai 602 102 India School of Computer Science and Engineering Anna University Chennai 600 025 India

An efficient method for fingerprint searching using recurrent autoassociative memory is proposed. This algorithm uses recurrent autoassociative memory, which uses a connectivity matrix to find if the pattern being searched is already stored in the database. The advantage of this memory is that a big database is to be searched only if there is a matching pattern. Fingerprint comparison is usually based on minutiae matching, and its efficiency depends on the extraction of minutiae. This process may reduce the speed, when large amount of data is involved. So, in the proposed method, a simple approach has been adopted, wherein first determines the closely matched fingerprint images, and then determines the minutiae of only those images for finding the more appropriate one. The gray level value of pixels along with its neighboring ones are considered for the extraction of minutiae, which is more easier than using ridge information. This approach is best suitable when database size is large. © World Scientific Publishing Company.

关键词： Minutiae extraction Pattern matching Recurrent autoassociative memory

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Solutions of a problem of Ore on spanning trees and its generalization

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Electronic Notes in Discrete Mathematics 2003年 15卷 127-130页

作者： Mund, G.B. Rao, S.B. Mohapatra, C.K. Department of Computer Science Engineering Indian Institute of Technology Kharagpur India Stat-Math Unit Indian Statistical Institute Kolkata India Institute of Mathematics and Applications Bhubaneswar India

We consider graphs, not necessarily finite, with neither loops nor multiple edges. Pertinent definitions are given below. For notation and definitions not given here, we generally follow Harary and Buckley [1]. Let G = (V,E) be a connected graph. The distance between vertices u and v in G, d_G(u,v), is the shortest length of a u - v path in G. The eccentricity of u in G, e_G(u) = sup{d_G(u,v) : v ∈ V(G)}. A spanning tree T of a graph G is called a distance preserving spanning tree of G if there exists a vertex u_T of G such that d_T(u_T,x) = d_G(u_T,x) for every vertex x of G. Note that for every vertex v of a connected graph G there exists a distance preserving spanning tree T of G with u_T = v. Every subtree of G can be extended to a spanning tree of G, by the axiom of choice. A connected graph G is said to have the property P if every spanning tree T of G is a distance preserving spanning tree of G. The following problem was posed by Ore [see [2], page 102, problem 4]. © 2005 Elsevier Ltd. All rights reserved.

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Co-firing technology for buried resistors

Co-firing technology for buried resistors

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作者： Yadagiri, G. Goswami, K.K. Gurumurthy, K.S. Satyam Shankara, K.N. ISRO Satellite Center Bangalore India Department of Electronics and Computer Science Engineering UVCE Bangalore India Department of Electronics and Communications Engineering 118c Bangalore India Space Applications Center Ahmedatwd India

ISBN: (纸本)0791836908

The complexity and performance of the electronic components and systems is increasing and placing greater demands on compact packaging and interconnection technologies. Multilayer thick film technology is one of the important technologies adopted in the miniaturization of electronic systems. Normally only interconnections are made in the ntermediate layers. The possibility of fabricating resistors along with interconnections in the intermediate layers using conventional thick film materials using co-firing process has been examined in mis paper. Normally multilayer structures are fabricated by printing / drying / firing of each layer separately starting from the bottom most layer (sequential processing). In this process the bottom layers undergo sintering many times. To avoid many firing cycles and to save power and processing time, a study is taken up to examine the effects of co-firing on the multilayer structure with embedded resistors. The results of the study are presented in this paper.

关键词： Thick films

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Tri-diagonalization of the covariance matrix generated by the multistage Wiener filter for whitening blind signals

Tri-diagonalization of the covariance matrix generated by th...

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2003 IEEE Wireless Communications and Networking Conference: The Dawn of Pervasive Communication, WCNC 2003

作者： Sud, Seema Myrick, Wilbur L. Goldstein, J. Scott Department of Electrical and Computer Engineering George Mason Univ. FairfaxVA22030 United States Science Applications International Corporation 4501 Daly Drive Suite 400 ChantillyVA20141 United States

ISBN: (纸本)0780377001

The multistage Wiener filter (MWF) has been shown to provide performance benefits that meet or exceed MMSE performance. The principle behind the MWF is a whitening operation naturally created by a tri-diagonalization of the covariance matrix at each stage. In blind mode, tri-diagonalization of the implicit covariance matrix structure no longer occurs, resulting in sub-optimal performance. In this paper, we show, using the CDMA system as an example, that tri-diagonalization can occur for blind mode using larger sample support or spatial diversity at the transmit or receive antenna. © 2003 IEEE.

关键词： Covariance matrix

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Tri-diagonalization of the covariance matrix generated by the multistage Wiener filter for whitening blind signals

Tri-diagonalization of the covariance matrix generated by th...

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IEEE Conference on Wireless Communications and Networking

作者： S. Sud W.L. Myrick J.S. Goldstein Department of Electrical and Computer Engineering George Mason University Fairfax VA USA Science Applications International Corporation Chantilly VA USA

关键词： Covariance matrix Signal generators Wiener filter Multiaccess communication Performance loss Application software Drives Receiving antennas Interference Performance analysis

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