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international conference on computer technology and development

作者： Suciati, Nanik Harada, Koichi Hiroshima Univ Dept Informat Engn Grad Sch Engn Hiroshima 730 Japan

ISBN: (纸本)9780769538921

Since 3D models have been used in wide range of industries, such as entertainment, architecture, medical, etc, the availability of tools to ease the creation of 3D models is important. This paper proposes and implements an algorithm for converting 2D image into sequence of curves on 3D flat model. This work is a part of a system for applying detail features captured from 2D image into 3D model. With 2D image as the input and 3D flat model containing sequences of curves as the output, the main processes in our algorithm are edge detection, connected-component labeling, finding list of control point's curves, mapping 2D canvas into 3D flat model, and drawing cubic B-spline curve which interpolates endpoints. The experiment shows that the curves on 3D model can approximate the shape-content of 2D image, and the processing time of algorithm is sufficiently fast.

关键词： computer graphics image processing edge detection connected-component labeling b-spline curve

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On Faster Bounding Volume Hierarchy Construction for Avatar Collision Detection

On Faster Bounding Volume Hierarchy Construction for Avatar ...

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international conference on computer technology and development

作者： Suaib, Norhaida Mohd Bade, Abdullah Mohamad, Dzulkifli Sulaiman, Hamzah Asyrani Univ Teknol Malaysia Fac Comp Sci & Informat Syst Dept Comp Graph & Multimedia Utm Skudai 81310 Johor Malaysia

ISBN: (纸本)9780769538921

In many interactive computer graphics applications, users are represented as virtual characters called avatars. Collision detection is a pre-requisite in interactive computer graphics application so that appropriate response and realistic behaviour can be generated. However, it will not be easy to anticipate collisions since objects' motion are dependant on user interaction and avatar manipulation. Ideally, collision detection needs to be done efficiently, with accurate result in the shortest time possible. However, due to its computationally intensive nature, collision detection could cause a bottleneck to the system. A variety of techniques, data structures and algorithms were proposed to accelerate the collision detection process. Acceleration data structures are widely used not only to promote faster collision detection, but also in the field of ray tracing and deformable objects simulation. This paper discusses the use of bounding volume hierarchy as an acceleration data structure in collision detection for avatar in virtual environment, as well as similar methods used in interactive ray tracing and deformable objects simulation. Based on these findings, method for fast bounding volume hierarchy construction is proposed as a first step towards efficient avatar collision detection.

关键词： collision detection bounding volumes bounding volume hierarchies virtual reality computer graphics

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Analysis of the anisotropic spatial variability and three-dimensional computer simulation of agricultural soil bulk density in an alluvial plain of north China

Analysis of the anisotropic spatial variability and three-di...

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第三届国际计算机及计算技术农业应用学术会议

作者： Y.He~a,K.L Hu~(a,*),Y.F.Huang~a,B.G.Li~a,D.L.Chen~b a Department of Soil and Water Sciences,Resources and Environmental Sciences College,China Agricultural University,Beijing 100193,China b Department of Resource Management and Geography,Melbourne School of Land and Environment,The University of Melbourne,Victoria 3010,Australia

Statistical analysis of the heterogeneity of soil bulk density in regional scale is important to crop growth and tillage *** most field data focus on bulk density up to a depth of 0.3 m,this study measured the bulk density of 28 in situ soil core locations up to a depth of 1.3 *** method was used to analyze the anisotropic spatial variability and three-dimensional Sequential Gaussian Simulation(SGSIM) was *** results of nugget/sill ratio indicated that the sampling scheme was fine enough to capture the spatial correlation distance of bulk density in the vertical *** nugget effect, however,in the horizontal direction suggested that the sampling frequency was not enough for bulk density in that *** result of three-dimensional SGSIM is consistent with measured data,indicating that the simulation method is suitable for this research objective. The results may provide basic information for other agricultural management practices.

关键词： Soil bulk density Spatial variability Regional scale Sequential Gaussian Simulation

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development of Smart Drop Restoration Scheme for Customer's Ease in the i-FTTH EPON Network Solution

Development of Smart Drop Restoration Scheme for Customer's ...

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international conference on computer technology and development

作者： Ab-Rahman, Mohammad Syuhaimi Hassan, Siti Rahayu Jumari, Kasmiran Univ Kebangsaan Malaysia Dept Elect Elect & Syst Engn Fac Engn & Built Environm Comp & Network Secur Res Grp Bangi 43600 Selangor Malaysia

ISBN: (纸本)9780769538921

This paper addresses a new restoration mechanism in drop region of EPON network by using the optical switch device to increase the efficiency, survivability and reliability of fiber to the home (FTTH) customer access network. The developed device will be installed at the drop section to detect the failure line that occurs in the multi-line drop section of FTTH network downwardly from passive optical splitter to the customer premises (ONU). The drop section restoration mechanism called smart drop restoration scheme (SDRS) will contribute for tree based and bus based architecture. Conventionally, the failure line of FTTH network can be measured using Optical Time-Domain Reflectometer (OTDR) upwardly from customer premises to the central office. The optical switches will be controlled by Access Control System (ACS). If the breakdown is the detected in drop section, ACS will recognize the related access line by the 3% tapped signal that is connected to every access line. The activation signal is then sent to activate the dedicated protection scheme. But if fault is still not restored, the shared protection scheme will be activated. Results from Optisystem software simulation will be presented so as to prove the solution feasibility.

关键词： component FTTH PON restoration optical switch

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Comparative Analysis on Spatio-Temporal Land Use and Land Cover (LULC) Characteristics in Three Asia Cities

Comparative Analysis on Spatio-Temporal Land Use and Land Co...

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2010 The 3rd international conference on Computational Intelligence and Industrial Application (PACIIA2010)

作者： Inakwu O.A.Odeh Faculty of Agriculture Food and Natural Resources The University of Sydney SydneyAustralia

integration of Geographical Information System (GIS) and Remote Sensing (RS) methods is one of the most important methods for detecting LULC’s change. In this study,with the support of GIS,RS technology and based on recent 10 years LULC data,the landscape pattern dynamics and regional spatio-temporal features related with the LULC change of three metropolis in Asian region,Zhangjiagang (China),Dehradun (India),and Hanoi (Vietnam) are analyzed. We mapping the LULC using supervised method with parallelepiped-maximum likelihood algorithm in ERDAS Imagine 9.1 of the study area based on three consecutive satellite images: Landsat TM,Landsat ETM+ and ASTER. The regional feature of the three cities illustrates different development direction,and the urbanization process of the cities was at different stages. Zhangjiagang was found at the highest stage of urbanization,and with the significant high per capita income level. Hanoi and Dehradun were demonstrated a moderate degree of urbanization and extensive land alternation of agricultural and non-used land to urban area. In Hanoi,Vietnam’s capital city,urban agriculture is a longstanding feature,but rapid urban growth is leading to greater competition over land use. In Dehradun,urban areas increased from 96.15 ha to 150.23 ha while agricultural areas decreased from 91.59ha to 45.33ha from 2000-2009. Urban class showed an overall amount and extent of change from 28023 ha to 33215 ha while agricultural areas decrease from 45031 to 41173 during 2002-2010 in Zhangjiagang. As the result,the issue of low quality and security of food was concerned in these three areas. Government support has encouraged urban producers to modernize and invest in safer developing practices. However,in these cities,as indeed elsewhere,there is an urgent need to recognize the significance of sustainable development,agriculture and native forest area reservation in future planning strategies. This kind of strategies identifies key trends and underlying

关键词： LULC change Urbanization Land-use competition Sustainable development Comparative analysis Zhangjiagang Dehradun Hanoi.

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Study on the status of computer education in logistics management professional and reform proposals

Study on the status of computer education in logistics manag...

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4th international conference on computer Science and Education

作者： Peng, Jianliang Zhejiang Gongshang Univ ZGSU Coll Comp Sci & Informat Engn Hangzhou Zhejiang Peoples R China

ISBN: (纸本)9781424435197

According to accelerate the development of logistics information technology trends and business-to-complex logistics management personnel requirements, logistics management believes that the strengthening of professional computer education. Through surveys, analysis of China's logistics management college computer education the main problems, the corresponding recommendations for improvement, which is China's colleges and universities logistics management and healthy development of professional, is very useful.

关键词： Logistics management computer education reformation

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The Design and Construction of Online Learning Environment for Students' Subjective development

The Design and Construction of Online Learning Environment f...

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2nd IEEE international conference on computer Science and Information technology

作者： Zhao Xiangfei Jiao Baocong Capital Normal Univ Dept Educ Technol Beijing Peoples R China

ISBN: (纸本)9781424445189

Based on develoopment of subjectivity for students,the thesis raises a thought about designing an online learning environment,so as to improve the development of subjectivity on students. Then it analysizes the design thought and the flow of work for online learning environment,and draws up the flow chart of work. At last,it illustrates the feasibility on development of subjectivity for students.

关键词： subjectivity subjective development online learning environment work flow

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Analysis and Research on the Security Key technology of Grid

Analysis and Research on the Security Key Technology of Grid

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4th international conference on Frontier of computer Science and technology

作者： Longjun, Zhang Engn Coll APF Dept Commun Engn Xian Peoples R China

The security of Grid is becoming a key problem for its further application. At present, many organizations of Grid are trying to solve this problem. This paper discusses the advantages of the latest technology of Grid... 详细信息

ISBN: (纸本)9780769539324

关键词： Authentication Data security Information security Grid computing Public key computer security Communication system security Protocols computer networks Standards development

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eLearniXML: Towards a model-based approach for the development of e-Learning systems considering quality

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ADVANCES IN ENGINEERING SOFTWARE 2009年第12期40卷 1297-1305页

作者： Fardoun, Habib Montero, Francisco Lopez Jaquero, Victor Univ Castilla La Mancha Comp Syst Dept Albacete 02071 Spain

With the evolution of technology, and especially of the Internet, a growing interest has appeared for online education. The many advantages of e-Learning have made this teaching philosophy an ideal partner for teachers, either as a complement to regular education or as a substitute for traditional education. The development of an e-Learning system poses extra challenges for software developers, since there are other facets, such as contents and user tracking, not usually considered in software development methodologies. In this paper eLearniXML approach to the development of e-Learning systems is presented. This approach enriches the development of e-Learning systems method proposed in ADDIE with the model-based development of user interfaces and software quality consideration. By doing so, we aim at the development of, what we have named, a Model-Based Instructional development Environment (MB-ISDE), to include e-Learning development in the current trends of model-based software development. (C) 2009 Elsevier Ltd. All rights reserved.

关键词： e-Learning Model-based design of user interfaces MB-ISDE

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Design and development of PC-based EGSE Platform for the SST Payload

Design and Development of PC-based EGSE Platform for the SST...

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2nd IEEE international conference on computer Science and Information technology

作者： Liu Fei-Fei Chinese Acad Sci Natl Astron Observ Beijing Peoples R China

ISBN: (纸本)9781424445189

The Space Solar Telescope (SST) will carry five instruments as the payload on board a satellite, which imposes great challenges on the SST payload EGSE (Electrical Ground Support Equipment) development in both the engineering and technical aspects. To meet those challenges, a platform based EGSE development method is proposed. The basic principle is to develop the SST payload EGSE with a modular architecture and on a re-usable software platform. This paper describes the experiences gained during the preliminary design and implementation which was carried out in parallel with the hardware development.

关键词： Payload EGSE EGSE platform CCSDS 660.0 Space Solar Telescope

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