检索结果-内蒙古大学图书馆

digital human modeling for design and engineering symposium

作者： De Craecker, W. Druyts, H. Ramon, H. Forausbergher, E. Haex, B. Audekercke, R. Van Coorevits, P. Vanderstraeten, G. Universiteit Leuven Belgium UZ Gent Belgium

Low back pain presents a common problem in occupational health, where exposure to vibration in vehicles is recognised as an important risk factor. It is commonly accepted that long-term exposure to whole-body vibrations can induce degenerative changes in the lumbar spine, but it is not understood what injury mechanisms are responsible for the problems involved. The standard approach is to model and to measure spine movement in response to low frequency vibrations (in the range of 0-20 Hz), in order to make a realistic prediction of vibration transmission through the human body, and of consequent pressure/tension between spine segments. This information, together with data on muscle behaviour, should produce an improved understanding of the spinal movements caused by vibration, and provide objective means for comfort and health evaluation of specific vibration frequencies and body postures. Therefore a two-dimensional active biomechanical model is presented which allows the determination of these unknown internal forces between spine segments. This model consists of the sacrum, the lumbar and thoracic vertebrae, a neck and a head. All these parts are modelled as rigid bodies, connected by non-linear stiffnesses. Geometry, inertial properties as well as the musculature of the model are determined according to human anatomy. Furthermore experiments are executed to determine seat-to-head transmissibilities, while the subjects were sitting in three different postures (erect, normal and slouched). These transmissibilities are used to evaluate the model. Finally the intradiscal compressive forces are used as an estimate for the intradiscal pressure, which is a parameter that gives an idea about the severity of the vibrations and its possibility to give rise to damage of the intervertebral discs. Copyright © 2005 SAE International.

关键词： Automobile bodies

来源：评论

学校读者我要写书评

暂无评论

Appointments for 2005-2006 term

引用

IEEE Transactions on Very Large Scale Integration (VLSI) Systems 2005年第7期13卷 773-782页

作者： Ranganathan, Nagarajan Agrawal, Vishwani D. Chakradhar, Srimat T. Chakrabarty, Krishnendu Courtois, Bernard DeMara, Ronald Hu, Xiaobo Sharon Ismail, Yehea I. Jha, Niraj K. John, Lizy Kurian Ker, Ming-Dou Koren, Israel Liu, Bin-Da Marculescu, Diana Marculescu, Radu Narayanan, Vijaykrishnan Nassif, Sani R. Nowick, Steven M. Sapatnekar, Sachin S. Sherlekar, Sunil Sylvester, Dennis Vemuri, Ranga Pham, Michael Department of Computer Science and Engineering University of South Florida Tampa FL 33620 United States Department of Computer Science and Engineering Nanomaterials and Nanomanufacturing Research Center University of South Florida Tampa United States IEEE United States Systems United States Department of Electrical and Computer Engineering Rutgers University New Brunswick NJ United States IETE India ACM NEC Laboratories America Inc. Princeton NJ United States Duke University Durham NC United States ACM SIGDA Sigma Xi United States Laboratory of Techniques of Informatics and Microelectronics for Computer Architectecture ASME IMAPS IEEE Computer Society University of Central Florida Orlando United States Computer Engineering Program SEECS Department of Computer Science and Engineering University of Notre Dame Notre Dame IN United States Northwestern University Evanston IL United States Department of Electrical Engineering Princeton University Princeton NJ United States Association for Computing Machinery Austin United States UT Austin Engineering Foundation United States Department of Electronics Engineering National Chiao-Tung University Taiwan Department of Electrical and Computer Engineering University of Massachusetts Amherst United States Department of Electrical Engineering Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA United States Electrical and Computer Engineering Faculty Carnegie Mellon University Pittsburgh PA United States Computer Science and Engineering Department Pennsylvania State University University Park United States IBM Austin Research Laboratory Austin TX United States Columbia University New York NY United States Department of Electrical and Computer Engineering University of Minnesota Minneapolis United States Tata Consultancy Services Centre of Excellence for Embedded Systems India Department of Electrical Engineering IIT Bombay India Department of Electrical Engineering Uni

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Binary document image watermarking for secure authentication using perceptual modeling

Binary document image watermarking for secure authentication...

引用

5th IEEE International symposium on Signal Processing and Information Technology

作者： Puhan, Niladri B. Ho, Anthony T. S. Center for Information Security School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore

In this paper, we propose a new perception based watermarking algorithm in binary document images for secure authentication purpose. Binary image watermarking with pixel flipping approach is a challenging problem, because flipping the black and white pixels in such simple images can bring noticeable visual distortion. A novel perceptual based model was proposed towards digital watermarking of binary images in [9], The model estimates the distortion resulting from flipping of a pixel by finding the curvature-weighted distance difference (CWDD) measure between original and watermarked contour segments. In this paper, the reversible property of the CWDD measure is used towards designing a new authentication watermarking algorithm so that the possibility of any undetected modification to the watermarked image is removed. This algorithm embeds an authentication signature computed from the original image into itself after identifying an ordered set of low-distortion pixels. The same ordered set of pixels are correctly found in both the embedder and blind detector through the design of necessary conditions. The ability of the proposed authentication algorithm to detect any modification in the watermarked image is equivalent to the security of cryptographic authentication. The parity attack found in the previous block-wise data hiding methods in binary images is not possible in the proposed algorithm due to pixel-wise embedding of the authentication signature. Simulation results show the imperceptibility of the watermarking process and successful detection of content modifications. © 2005 IEEE.

关键词： digital watermarking

来源：评论

学校读者我要写书评

暂无评论

The Modular modeling System (MMS): A toolbox for water- and environmental-resources management

The Modular Modeling System (MMS): A toolbox for water- and ...

引用

2005 Watershed Management Conference - Managing Watersheds for human and Natural Impacts: engineering, Ecological, and Economic Challenges

作者： Leavesley, George H. Markstrom, Steven L. Viger, Roland J. Hay, Lauren E. U.S. Geological Survey MS 412 DFC Denver CO 80225 United States

ISBN: (纸本)0784407630

The increasing complexity of water- and environmental-resource problems require modeling approaches that incorporate knowledge from a broad range of scientific and software disciplines. To address this need, the U.S. Geological Survey (USGS) has developed the Modular modeling System (MMS). MMS is an integrated system of computer software for model development, integration, and application. Its modular design allows a high level of flexibility and adaptability to enable modelers to incorporate their own software into a rich array of built-in models and modeling tools. These include individual process models, tightly coupled models, loosely coupled models, and fully- integrated decision support systems. A geographic information system (GIS) interface, the USGS GIS Weasel, has been integrated with MMS to enable spatial delineation and characterization of basin and ecosystem features, and to provide objective parameter-estimation methods for models using available digital data. MMS provides optimization and sensitivity-analysis tools to analyze model parameters and evaluate the extent to which uncertainty in model parameters affects uncertainty in simulation results. MMS has been coupled with the Bureau of Reclamation object-oriented reservoir and river-system modeling framework, RiverWare, to develop models to evaluate and apply optimal resource-allocation and management strategies to complex, operational decisions on multipurpose reservoir systems and watersheds. This decision support system approach has been developed, tested, and implemented in the Gunnison, Yakima, San Joaquin, Rio Grande, and Truckee River basins of the western United States. MMS is currently being coupled with the U.S. Forest Service model SIMulating Patterns and Processes at Landscape Scales (SIMPPLLE) to assess the effects of alternative vegetation-management strategies on a variety of hydrological and ecological responses. Initial development and testing of the MMS-SIMPPLLE integration is bein

关键词： Watersheds

来源：评论

学校读者我要写书评

暂无评论

Visual modeling for Software Intensive Systems

Visual Modeling for Software Intensive Systems

引用

IEEE symposium on Visual Languages and human Centric Computing (VL/HCC)

作者： H. Giese I.H. Kruger K.M.L. Cooper Universität Paderborn Germany University of California USA University of Texas Dallas USA

Summary form only given. Visual modeling techniques play an important role in the design and understanding of complex, software intensive systems. Block diagrams in systems engineering and the Unified modeling Languag... 详细信息

关键词： Software systems Object oriented modeling Systems engineering and theory Unified modeling language Software tools Software safety Embedded software

来源：评论

学校读者我要写书评

暂无评论

A content-based music retrieval system using representative melody index from music databases

A content-based music retrieval system using representative ...

引用

Second International symposium on Computer Music modeling and Retrieval, CMMR 2004

作者： Won, Jae-Yong Lee, Jae-Heon Ku, Kyongi Park, Jaehyun Kim, Yoo-Sung School of Information and Communication Engineering Inha University Incheon 402-751 Korea Republic of

For content-based music retrieval, since not only the correctness of retrieval results but also the performance of retrievals is important, there are great needs for efficient content-based music retrieval systems that can quickly retrieve the relevant music on demand from large music database with low storage overhead. In this paper, we describe the design and implementation of a content-based music retrieval system in which the representative melody index is systemically constructed and used to support quick and appropriate retrievals to users' melody queries. By using the proposed system for digital music libraries, it could save up to 65% of index space than that for the whole motifs index while the appropriateness of retrieval results is maintained. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Computer music

来源：评论

学校读者我要写书评

暂无评论

Overcoming Complexity and Tradition-Related Shortcomings of Enabling Technologies: Solutions for Advanced Information Displays in LCA

Overcoming Complexity and Tradition-Related Shortcomings of ...

引用

International symposium on Environmentally Conscious design and Inverse Manufacturing (Ecodesign)

作者： H.E. Otto F. Kimura K.G. Mueller Department of Precision Engineering University of Tokyo Tokyo Japan Siemens VDO Automotive Regensburg Germany

In practice, enabling technologies, along with digital models and computer-aided / computer-based systems, are still not sufficiently integrated to make life cycle modeling and life cycle assessment methods and technologies suitable tools for designers and engineers. For example, life cycle assessment is becoming more and more an integral tool in today's product design and design evaluation during analysis and optimization. However, approaches and tools that still feature old fashioned paradigms and structures in critical areas such as human-computer interaction and information representation are somewhat counter-productive, considering the increase of both the complexity of the problem and the quantities of data to be handled. In this paper we aim at presenting, in a transparent way, the motivations, structure, and consequences of one approach leading to solutions which overcome such obstacles. This approach also supports the application and successful translation into practice of one modern methodology which is central for the cradle-to-grave evaluation used to improve environmentally conscious products and service designs.

关键词： Displays Data visualization Automotive engineering design engineering Product design Documentation humans design optimization Modems design methodology

来源：评论

学校读者我要写书评

暂无评论

Power sources compared: The ultimate truth?

Power sources compared: The ultimate truth?

引用

24th International Power Sources symposium and Exhibition 2005 on Power Sources and the Environment, IPSS 2005

作者： Flipsen, S.F.J. Delft University of Technology Faculty of Industrial Design Engineering Landbergstraat 15 2628 CE Delft Netherlands

ISBN: (纸本)9781605601113

Especially during the last decade the demand for portable power is steadily rising due to the increasing wireless products integrated in our day-to-day lives (cellular phone, personal digital assistant (PDA) and of course the remote control for your television set or VCR). These portable consumer electronics are mainly powered by alkaline batteries, and nowadays more and more by rechargeables. Alternative power sources, like fuel cells and photovoltaic cells, can be used in portable consumer electronics, possibly making them more cost-effective, more environmentally and user friendly. For the consumer industry the opportunities of these other alternative power-sources is unknown, and designers are not known with the state-of-the-art of the technology. Opportunities for short-term but especially long-term developments in portable electronics are in that way overlooked. In this paper the most interesting power-sources available will be compared on the basis of power and energy characteristics, and costs. Emerging power sources like fuel cells are a very interesting alternative for the lithium-ion battery, but the road ahead for it is still long when we look at state-of-the-art developments. Other power sources described and compared are: ether-smog, human power, thermo-electric generators, piëzo generators, electro-mechanical devices, photovoltaic cells, micro fuel-cells and micro combustion-engines.

关键词： Fuel cells

来源：评论

学校读者我要写书评

暂无评论

Control of a buck inverter for grid-connected PV systems: a digital and sliding mode control approach

Control of a buck inverter for grid-connected PV systems: a ...

引用

IEEE International symposium on Industrial Electronics (ISIE)

作者： J.J. Negroni C. Meza D. Biel F. Guinjoan Electronic Engineering Department Barcelona UPC Spain Institute of Industrial and Control Engineering UPC Barcelona Spain Electronic Engineering Department UPC Vilanova i la Geltru Spain

This work describes the analysis, modeling and design of a buck-based inverter control for grid-connected photovoltaic (PV) systems. On one hand a linear digital voltage controller is designed from a large-signal linear sampled-data model of the system to maximize the steady-state input-output energy transfer ratio. On the other hand, a sliding-mode current controller is also designed to assure a unity power factor. The achievement of the DC-AC conversion and the efficient PVs energy extraction are validated with simulation results.

关键词： Sliding mode control Control systems Inverters Photovoltaic systems Solar power generation digital control Voltage control Power system modeling Steady-state Energy exchange

来源：评论

学校读者我要写书评

暂无评论

modeling Approach for Auction Based Markets

Modeling Approach for Auction Based Markets

引用

Workshops on Applications and the Internet (SAINT)

作者： J. Makio I. Weber Information Management and Systems University of Karlsruhe Karlsruhe Germany

designing and conceptualizing electronic auction systems is a complex task dependent on human, economic, and technical factors. In this paper, we propose a way to simplify that design task and reduce complexity. Using the two software engineering approaches "abstraction" and "divide and conquer" we show how these approaches can be mapped into auction design. The "abstraction" approach leads to a process template that can be parameterized; the "divide and conquer" approach leads to a component based definition of electronic auctions. Both approaches are unified within a "market modeling language (MML)" which provides the design of auction based electronic markets.

关键词： Consumer electronics Computer science Software engineering Information management human factors Information technology Economic forecasting Internet Conferences engineering management

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：