检索结果-内蒙古大学图书馆

2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009

作者： Cheng, Xiang Laurenson, David I. Salous, Sana Vasilakos, Athanasios V. Joint Research Institute for Signal and Image Processing School of EPS Heriot-Watt University Edinburgh EH14 4AS United Kingdom Center for Communication Systems University of Durham Durham DH1 3LE United Kingdom Department of Computer and Telecommunications Engineering University of Western Macedonia Kozani GR 50100 Greece

ISBN: (纸本)9781605585697

To simulate mobile-to-mobile (M2M) Rayleigh fading channels under more realistic scenario of non-isotropic scattering, we propose one deterministic and one stochastic sumof- sinusoids (SoS) based simulation models. The proposed models extensively consider the distributions of the angle of arrival (AoA) and the angle of departure (AoD), and thus show a good approximation to the desired statistical properties of the reference model. Copyright 2009 ACM.

关键词： Rayleigh fading

来源：评论

学校读者我要写书评

暂无评论

The structure of uniform B-spline curves with parameters

引用

Progress in Natural Science:Materials International 2008年第3期18卷 303-308页

作者： Juan Cao , Guozhao Wang institute of image processing and computer Graphic, department of mathematics, Zhejiang University, Hangzhou 310027, China Institute of Image Processing and Computer Graphic Department of Mathematics Zhejiang University Hangzhou 310027 China

The shape-adjustable curve constructed by uniform B-spline basis function with parameter is an extension of uniform B-spline curve. In this paper, we study the relation between the uniform B-spline basis functions with parameter and the B-spline basis functions. Based on the degree elevation of B-spline, we extend the uniform B-spline basis functions with parameter to ones with multiple parameters. Examples show that the proposed basis functions provide more flexibility for curve design.

关键词： Uniform B-spline Shape parameter Shape-adjustable curve Degree elevation

来源：评论

学校读者我要写书评

暂无评论

Unsupervised extraction of false friends from parallel bi-texts using the Web as a corpus

Unsupervised extraction of false friends from parallel bi-te...

引用

International Conference on Recent Advances in Natural Language processing, RANLP-2009

作者： Nakov, Svetlin Nakov, Preslav Paskaleva, Elena Department of Mathematics and Informatics Sofia University St Kliment Ohridski 5 James Bourchier Blvd. 1164 Sofia Bulgaria Linguistic Modeling Department Institute for Parallel Processing Bulgarian Academy of Sciences 25A Acad. G. Bonchev St. 1113 Sofia Bulgaria Department of Computer Science National University of Singapore 13 Computing Drive Singapore 117417 Singapore

False friends are pairs of words in two languages that are perceived as similar, but have different meanings, e.g., Gift in German means poison in English. In this paper, we present several unsupervised algorithms for acquiring such pairs from a sentence-aligned bi-text. First, we try different ways of exploiting simple statistics about monolingual word occurrences and cross-lingual word co-occurrences in the bi-text. Second, using methods from statistical machine translation, we induce word alignments in an unsupervised way, from which we estimate lexical translation probabilities, which we use to measure cross-lingual semantic similarity. Third, we experiment with a semantic similarity measure that uses the Web as a corpus to extract local contexts from text snippets returned by a search engine, and a bilingual glossary of known word translation pairs, used as "bridges". Finally, all measures are combined and applied to the task of identifying likely false friends. The evaluation for Russian and Bulgarian shows a significant improvement over previously-proposed algorithms.

关键词： Search engines

来源：评论

学校读者我要写书评

暂无评论

Computational fluid flow simulation on body fitted mesh geometry with IBM cell broadband engine architecture

Computational fluid flow simulation on body fitted mesh geom...

引用

European Conference on Circuit Theory and Design, ECCTD

作者： Zoltan Nagy Andras Kiss Sandor Kocsardi Arpad Csik Computer and Automation Research Institute Hungarian Academy of Sciences Changzhou China Department Information Technology Pázmány Péter Catholic University Changzhou China Department Image Processing and Neurocomputing University of Pannonia Veszprem Hungary Department of Mathematics and Computational Sciences Széchenyi István University Gyor Hungary

The solutions of partial differential equations (PDEs) play a key role in today's real world simulations. Computational Fluid Dynamics (CFD) is an important part of this area, which involves the problem of gas or fluid flow over different obstacles, e.g., air flow around vehicles, buildings, or the flow of water in the oceans. In engineering applications the temporal evolution of non-ideal, compressible fluids is quite often modeled by the system of Navier-Stokes equations. They are a coupled set of nonlinear hyperbolic partial differential equations and form a relatively simple, yet efficient model of compressible fluid dynamics. In the paper the implementation of a CFD on Body Fitted Mesh geometry on the Cell Broadband Engine is described. An arbitrary surface can be more easily simulated on body fitted mesh than on rectangular computation domain.

关键词： Fluid flow Computational modeling Solid modeling Computational geometry Engines computer architecture Computational fluid dynamics Partial differential equations Marine vehicles Buildings

来源：评论

学校读者我要写书评

暂无评论

Learning a nonlinear color distance metric for the identification of skin immunohistochemical staining

Learning a nonlinear color distance metric for the identific...

引用

2009 22nd IEEE International Symposium on computer-Based Medical Systems, CBMS 2009

作者： Sobieranski, Antonio Carlos Neto, Sylvio Luiz Mantelli Coser, Leandro Comunello, Eros Von Wangenheim, Aldo Cargnin-Ferreira, Eduardo Di Giunta, Gabriella LAPIX Laboratory of Image Processing and Computer Graphics UFSC Federal University of Santa Catarina Brazil CPTEC Center for Weather Forecasts and Environment Studies INPE - Brazilian Institute for Space Research Brazil EGC Knowledge Engineering Department UFSC - Federal University of Santa Catarina Brazil MCA Graduate Program in Applied Computer Science UNIVALI - Itajai Valley University Brazil Laboratory of Histological Markers Department of Biology Embriology and Genetics UFSC - Federal University of Santa Catarina Brazil Pathology Service UFSC - Federal University of Santa Catarina Brazil

ISBN: (纸本)9781424448784

This paper presents a semiautomatic method for the identification of immunohistochemical (IHC) staining in digitized samples. The user trains the system by selecting on a sample image some typical positive stained regions that will be used as a reference for the construction of a distance metric. In this learning process, the global optimum is obtained by induction employing higher polynomial terms of the Mahalanobis distance, extracting nonlinear features of the IHC pattern distributions. The results of the proposed method showed a high correlation to a pathologist's manual analysis, which was used as a golden standard, presenting a more robust discrimination between stained and non-stained areas with little bias. © 2009 IEEE.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A layered approach to robust lane detection at night

A layered approach to robust lane detection at night

引用

IEEE Workshop on Computational Intelligence in Vehicles and Vehicular Systems, CIVVS

作者： Amol Borkar Monson Hayes Mark T. Smith Sharathchandra Pankanti Center of Signal and Image Processing (CSIP) Georgia Institute of Technology USA Department of Communication Systems KTH Swedish Royal Institute of Technology Sweden Exploratory Computer Vision Group (ECVG) IBM Thomas J. Watson Research Center USA

A layered approach is designed to address many of the real-world problems that an inexpensive lane detection system would encounter. A region of interest is first extracted from the image followed by an enhancement procedure to manipulate the shape of the lane markers. The extracted region is then converted to binary using an adaptive threshold. A model based line detection system hypothesizes lane position. Finally, an iterated matched filtering scheme estimates the final lane position. The developed system shows good performance when tested on real-world data that contains fluctuating illumination and a variety of traffic conditions.

关键词： Robustness image edge detection Cameras image converters Lighting Road accidents Automobiles Pixel Road transportation image segmentation

来源：评论

学校读者我要写书评

暂无评论

Free-Form Deformation with Rational DMS-Spline Volumes

引用

Journal of computer Science & Technology 2008年第5期23卷 862-873页

作者：徐岗汪国昭陈小雕 Institute of Computer Graphics and Image Processing Zhejiang University Department of Mathematics Zhejiang University College of Computer Science Hangzhou Dianzi University INRIA Nancy France

In this paper, we propose a novel free-form deformation （FFD） technique, RDMS-FFD （Rational DMS-FFD）, based on rational DMS-spline volumes. RDMS-FFD inherits some good properties of rational DMS-spline volumes and combines more deformation techniques than previous FFD methods in a consistent framework, such as local deformation, control lattice of arbitrary topology, smooth deformation, multiresolution deformation and direct manipulation of deformation. We first introduce the rational DMS-spline volume by directly generalizing the previous results related to DMS-splines. How to generate a tetrahedral domain that approximates the shape of the object to be deformed is also introduced in this paper. Unlike the traditional FFD techniques, we manipulate the vertices of the tetrahedral domain to achieve deformation results. Our system demonstrates that RDMS-FFD is powerful and intuitive in geometric modeling.

关键词： free-form deformation rational DMS-spline volume control lattice of arbitrary topology multiresolution deformation direct manipulation

来源：评论

学校读者我要写书评

暂无评论

Forward-backward sequential Monte Carlo smoothing for joint target detection and tracking

Forward-backward sequential Monte Carlo smoothing for joint ...

引用

International Conference on Information Fusion

作者： Daniel E. Clark Ba Tuong Vo Ba Ngu Vo Joint Research Institute in Signal & Image Processing School of Engineering & Physical Sciences Heriot-Watt University UK School of Electrical Electronic & Computer Engineering University of Western Australia Crawley WA Australia Department of Electrical & Electronic Engineering University of Melbourne Parkville VIC Australia

ISBN: (纸本)9780982443804

The problem of jointly detecting whether a target is present in a scene and, if there is, estimating its state can be viewed as a multi-object estimation problem where there is a maximum of one target. This joint detection and estimation problem can be solved using a special case of the multi-object Bayes filter. In this paper we investigate the joint target detection and estimation problem with forward-backward smoothing and propose a sequential Monte Carlo implementation. Finite Set Statistics not only facilitates the development of appropriate joint detection and estimation filters, but also the direct extension of these filtering solutions to their related smoothing counterparts. Preliminary results indicate that using the smoothing has two distinct advantages over just using filtering: Firstly, we are able to more accurately identify the appearance and disappearance of a target in the scene and secondly, we can provide improved state estimates when the target exists.

关键词： Monte Carlo methods Smoothing methods Object detection Target tracking Nonlinear filters Filtering State estimation Layout Current measurement Delay estimation

来源：评论

学校读者我要写书评

暂无评论

ωB-splines

引用

Science in China(Series F) 2008年第8期51卷 1167-1176页

作者： FANG Mei'E WANG GuoZhao Institute of Computer and Image Processing and the Department of Mathematics Zhejiang University Hangzhou 310027 China College of Computer Hangzhou Dianzi University Hangzhou 310018 China

A new kind of spline with variable frequencies, called ωB-spline, is presented. It not only unifies B-splines, trigonometric and hyperbolic polynomial B-splines, but also produces more new types of splines, ωB-spline bases are defined in the space spanned by {coso） t, sino）t, ], t, ..., t^n, ...} with the sequence of frequencies m where n is an arbitrary nonnegative integer, ωB-splines persist all desirable properties of B-splines. Furthermore, they have some special properties advantageous for modeling free form curves and surfaces.

关键词： ωB-splines frequencies B-splines trigonometric polynomial B-splines hyperbolic polynomial B-splines

来源：评论

学校读者我要写书评

暂无评论

Fabrication of QCM sensor array and PDMS micro chamber for biosensor applications

Fabrication of QCM sensor array and PDMS micro chamber for b...

引用

International Conference on Electrical Engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON

作者： K. Jaruwongrungsee T. Maturos K. Wong-ek M. Sangworasil C. Pintavirooj A. Wisitsora-at A. Tuantranont Biomedical Signal and Image Processing Laboratory Department of Electronics Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand Nanoelectronics and MEMS Laboratory National Electronics and Computer Technology Center Pathum Thani Thailand Nanosceince and Technology Program Graduated College Chulalongkom University Bangkok Thailand

In this work, an array of quartz crystal microbalance (QCM) sensors is fabricated on a single quartz crystal substrate and attached with poly(dimethylsiloxane) (PDMS) micro chamber for using in flow-injection system. The Cr/Au electrode array is deposited on both side of quartz substrate by sputtering through electroplated microshadow mask. PDMS micro chamber was fabricated by mold casting technique with SU-8 mold. Fabricated PDMS micro chamber and QCM sensor array were attached together for using in flow-injection system. In our experiment, the QCM electrodes were coated with the carboxylic poly(vinyl chloride) (PVC-COOH) and then the carboxylic group was activated with carbodiimide hydrochloride (EDC) and N-hydroxylsuccinimide (NHS) for protein binding. The scanning electron micrograph shown the trapped protein on the modified sensing layer, it confirmed that our QCM sensor and PDMS micro chamber can be used as QCM biosensor array. This new QCM sensor array provide possibility of multiple detection in small amount of sample within a single quartz crystal substrate that avoid the error signal from the different properties of each sensor in an array.

关键词： Sensor arrays Biosensors Fabrication Sensor systems Electrodes Proteins Chromium Gold Sputtering Casting

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：