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检索条件"任意字段=Conference on Visualization and Data Analysis 2011"

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Open Government data on the Web: A Semantic Approach

Open Government Data on the Web: A Semantic Approach

引用

International conference on Emerging Intelligent data and Web Technologies (EIDWT)

作者： Julia Hoxha Armand Brahaj Institute of Applied Informatics and Formal Description Methods (AIFB) Karlsruhe Institute of Technology Germany FIZ Karlsruhe-Leibniz Institute for Information Infrastructure Germany

Initiatives of making government data open are continuously gaining interest recently. While this presents immense benefits for increasing transparency, the problem is that the data are frequently offered in heterogeneous formats, missing clear semantics that clarify what the data describe. The data are displayed in ways, which are not always clearly understandable to a broad range of user communities that need to make informed decisions. We address these problems and propose an overall approach, in which raw statistical data independently gathered from the different government institutions are formally and semantically represented, based on an ontology that we present in this paper. We further introduce the approach deployed in publishing these data in alignment with Linked data principles, as well as present the methods implemented to query single or combined dataset and visualize the results in understandable ways. The introduced approach enables data integration, leading to vast opportunities for information exchange, analysis on combined datasets, simplicity to create mashups, and exploration of innovative ways to use these data creatively.

关键词： Ontologies Resource description framework Semantics data models Government Publishing data visualization

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Using students' tracking data in E-learning: Are we always aware of security and privacy concerns?

Using students' tracking data in E-learning: Are we always a...

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International conference on Communication Software and Networks, ICCSN

作者： Madeth May Sébastien George LIESP Laboratory INSA Lyon University of Lyon I Villeurbanne France

This paper presents a study on security and privacy concerns in E-learning. The study has been conducted along with our research effort that focuses on tracking students' activities on Computer-Mediated Communication tools (e.g. discussion forum, blog, wiki, etc.). It aims to express our attention on technical and ethical aspects of using tracking approach in the learning process. While the study covers an analysis of some existing research data of security in E-learning and user privacy protection provisions, it helps us gain a broader perspective of utilizing the tracking approach in our research. The major contribution of this paper is that it raises an awareness of the relevant issues, which are often neglected in the research efforts that implicate user tracking and personal data usage for instructional purposes.

关键词： Organizations Humans visualization

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PETransWS: Web Service Computing Platform for Logistics and Transportation

PETransWS: Web Service Computing Platform for Logistics and ...

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Euromicro conference on Parallel, Distributed and Network-Based Processing

作者： Francisco Almeida Vicente Blanco Julio Brito Andres Crespo Jose A. Moreno Adrian Santos PETrans Proyecto Estructurante de Transporte Department de Estadística I.O. y Computación University of La Laguna La Laguna Spain

In large organizations and small firms in transportation, there is a growing need to use and analyze spatial data. Transportation system analysis and planning as well as mobility studies frequently use Geographic Information Systems (GIS). In this paper we propose the development of a web services platform dedicated to transportation and logistics. Taking advantage of the web services development framework PyOpenCF we integrate in the same environment services oriented to geolocalization, logistical optimization, etc. We develop a PyOpenCF client whose graphic interface allows processes with spatial data to be launched and provides a visualization of the results.

关键词： Geographic Information Systems Transportation Servers Web services Standards data models Spatial databases

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Alpha particle induced single-event error rates and scaling trends in commercial SRAM cells

Alpha particle induced single-event error rates and scaling ...

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European conference on Radiation and its Effects on Components and Systems (RADECS)

作者： I. Chatterjee B. L. Bhuva S.-J. Wen R. Wong Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN USA Cisco Systems Inc. CA USA

Alpha particles are a critical reliability problem facing advanced technologies. This paper reports extensive tests over a wide range of technology nodes on CMOS SRAMs to study operating voltage, data pattern, operati... 详细信息

关键词： Random access memory Layout Error analysis Transistors visualization Sensitivity System-on-a-chip

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Contemporary Concerns in Geographical/Geospatial Information Systems (GIS) Processing

Contemporary Concerns in Geographical/Geospatial Information...

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IEEE National Aerospace and Electronics conference

作者： Erik P. Blasch Matthew Pellechia Paul B. Deignan Kannappan Palaniappan Shiloh L. Dockstader Gunasekaran Seetharaman Defence R&D Canada-Valcartier ITT Geospatial Systems L-3 Communications Univ. of Missouri-Columbia CS Dept. AFRL Information Directorate

ISBN: (纸本)9781457710407

With the advent of advances in Geospatial Information Systems (GIS);there is a need to determine the areas of research and new tools available for GIS systems. GIS consists of the collection, integration, storage, exploitation, and visualization of geographic and contextual data and spatial information. Future GIS needs, techniques, models, and standards should be shared openly among developers for future instantiation of products. The summary of selected areas include (1) support for large-data formats including meta-data transparency, (2) adherence to open standards, (3) generation of extensible architectures, and (4) development of a consistent set of metrics for analysis. The future of GIS products will include non-spatial as well as spatial data which requires information fusion, management functions from machine-processed data to user-defined actionable information, and use-case challenge problems for comparison.

关键词： Geospatial Geographical Information Systems Metrics Information fusion User refinement geographic information systems Information fusion Geospatial Science and Technologies Metronidazole spatial data Developers

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Research and implementation on visualization system of disassembly sequence planning based on Ant colony algorithm

Research and implementation on visualization system of disas...

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International conference on Computer Supported Cooperative Work in Design

作者： Xiaozhen Mi Xiaoyang Zhen Shaoze Zhou Wenhui Fan School of Transportation Engineering Dalian Jiaotong University Dalian China Automation Department Tsinghua University Beijing China

The visualization system of disassembly sequence planning verifies the feasibility and correctness of disassembly process providing a research platform for technologists and maintainer. This paper focuses on the algorithm of disassembly sequence planning and its visual simulation, and applies Ant colony algorithm (ACA) to optimize the disassembly sequence, in which interference matrix and stability matrix are established to express geometric constrains and stability constrains. By defining the state-transition rule and updating local and global pheromone, the algorithm is guided to find the optimal solution faster. The system interface is implemented based on Qt and the parts coding and sub-assemblies are defined on the basis of tree structures. The visual simulation of disassembling process is realized based on OSG. Relevant data in the system is stored and accessed by XML documents. Finally, the traction device of CRH3 EMU bogie is taken as an example to validate the efficiency of the algorithm and the practicability of the system. The research achieves desired results in the algorithm convergence, and the developed system is accessed easily and suitable for large-scale assemblies.

关键词： Assembly Planning Digital signal processing XML Solid modeling Stability analysis Algorithm design and analysis

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Development of measurement and control system for braking torque of wind turbine brake

Development of measurement and control system for braking to...

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International conference on Electrical and Control Engineering (ICECE)

作者： Kongwu Ji Xiaohui Li Chengcheng Zhu Jinsheng Xiao School of Automotive Engineering Wuhan University of Technology Wuhan China School of Computer Science and Technology Wuhan University of Technology Wuhan China Product Department Yuhuan Kailing Group Company Limited Taizhou China

Wind turbine is widely used in renewable energy system. A new measurement and control system for braking torque of wind turbine brake has been developed. High-precision torque sensors and hydraulic sensors are adopted to ensure accuracy of measurement and control. The Microsoft Visual C++ 6.0 is used to develop the system which has functions of data acquisition, storage, query and analysis.

关键词： Educational institutions Presses Torque Wind turbines Automotive engineering Torque measurement visualization

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Image pattern discovery by using the spatial closeness of visual code words

Image pattern discovery by using the spatial closeness of vi...

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IEEE International conference on Image Processing

作者： Meng Sun Hugo Van hamme Department of Electrical Engineering-ESAT Katholieke Universiteit Leuven Leuven Belgium

A graph regularized non-negative matrix factorization (NMF) model is proposed for image pattern discovery. Each image is represented by its histogram of visual words (i.e. bag-of-words) and the image contents are discovered by the NMF model. The graph regularization preserves the spatial closeness of visual code words in the obtained patterns, thus improving the bag-of-words representation against its main shortcoming: the loss of spatial information. Experiments on a subset of the Caltech256 database show the efficacy of the proposed model.

关键词： visualization Training Entropy Error analysis Mathematical model Training data Equations

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A novel two-stage algorithm for accurate registration of 3-D point clouds

A novel two-stage algorithm for accurate registration of 3-D...

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International conference on Multimedia Technology

作者： Jiajing Dai Jie Yang Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781612847719

Accurate registration of 3-D point clouds is a common problem in computer vision. This paper presents a new two-stage algorithm for point clouds registration. A novel local invariant feature which is a k-dimensional vector is proposed and used in our coarse registration stage. Two new structural constraints combined with the Iterative Closest Point (ICP) algorithm are adopted in our fine registration stage. The accuracy and effectiveness of our algorithm is visually and quantitatively demonstrated by the comparative experiments on synthetic and real 3-D data.

关键词： Iterative closest point algorithm Robustness Estimation Computer vision visualization Algorithm design and analysis Mathematical model

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Using canonical correlation analysis for generalized sentiment analysis, product recommendation and search 11

Using canonical correlation analysis for generalized sentime...

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5th ACM conference on Recommender Systems, RecSys 2011

作者： Faridani, Siamak Automation Sciences Lab. Department of Industrial Engineering and Operations Research University of California Berkeley CA United States

Standard Sentiment analysis applies Natural Language Processing methods to assess an "approval" value of a given text, categorizing it into "negative", "neutral", or "positive" ... 详细信息

ISBN: (纸本)9781450306836

Standard Sentiment analysis applies Natural Language Processing methods to assess an "approval" value of a given text, categorizing it into "negative", "neutral", or "positive" or on a linear scale. Sentiment analysis can be used to infer ratings values for users based on textual reviews of items such as books, films, or products. We propose an approach to generalizing the concept to multiple dimensions to estimate user ratings along multiple axes such as "service", "price" and "value". We use Canonical Correlation analysis (CCA) and derive a mathematical model that can be used as a multivariate regression tool. This model has a number of valuable properties: it can be trained offline and used efficiently on live stream of texts like blogs and tweets, can be used for visualization and data clustering and labeling, and finally it can potentially be incorporated into natural language product search algorithms. At the end we propose an evaluation procedure that can be used on live data when a ground truth is not available. Based on this model we present our preliminary results from empirical data that we have collected from our system Opinion Space1. We show that for this dataset the CCA model outperforms the PCA that was originally used in Opinion Space. © 2011 ACM.

关键词： Sentiment analysis

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