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IET International Conference on Frontier Computing. Theory, Technologies and Applications

作者： H. I. Huang Y. S. Wu Y. K. Chan C. H. Lin Department of Computer Science and Information Engineering National Taichung Institute of Technology Taiwan Graduate School of Computer Science and Information Technology National Taichung Institute of Technology Taiwan Department of Management Information System National Chung Hsing University Taiwan

This study was mainly about genetic algorithms of feature selection. The features adopted by this paper include CCM and DBPSP for the relationship between color and texture, CHKM for the color information of an image. The genetic algorithm of this study is implemented by MatLab program. The genetic algorithm optimization and searching technology adopted mechanics of genes and natural selection, and the algorithm implementation steps are: population initialization, fitness functions, selection, crossover, mutation, iteration and evolution. Feature selections used here are Sequential Forward Selection (SFS), Sequential Backward Selection (SBS), and the genetic algorithm-based feature selection used in this essay respectively. This study was analyzed and compared the result of the experiment respectively. The experiment was carried out for comparing the image retrieval accuracy, feature selection and computing time of image retrieval.

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3D topological reconstruction based on Hough transform and growing neural gas for informationally structured space

3D topological reconstruction based on Hough transform and g...

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2010 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Naoyuki Kubota Tsubasa Narita Beom Hee Lee Department of System Design Tokyo Metropolitan University Hino Tokyo Japan Japan School of Electrical Engineering and Computer Science Seoul National University of Technology Seoul South Korea

This paper proposes a method of 3D topological reconstruction for informationally structured space including sensor networks and robot partners for co-existing with people. The informationally structured space realizes the quick update and access of valuable and useful information for both people and robots on real and virtual environments. In this paper, we use distance information and color information measured by 3D distance image sensor and CMOS camera for 3D topological reconstruction. First, we propose an extraction method of objects from the background image based on Hough transform as preprocessing. Next, we propose a method of 3D topological reconstruction based on growing neural gas to construct informationally structured space. Finally, we show experimental results of the proposed method and discuss the effectiveness of the proposed method.

关键词： Three dimensional displays Robot sensing systems Transforms Cameras Image color analysis Mobile robots

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A Scenario Based Approach for Service Identification

A Scenario Based Approach for Service Identification

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IEEE Annual computer Software and Applications Conference Workshops (COMPSACW)

作者： Suntae Kim Minseong Kim Vijayan Sugumaran Sooyong Park Department of Computer Science and Engineering Sogang University Seoul South Korea Department of Computer Science George Mason University Fairfax VA USA School of Business Administration Oakland University Rochester MI USA Department of Service System Management and Engineering Sogang University Seoul South Korea

Service oriented approach is increasingly being utilized to develop business applications to keep pace with the changing environment and business requirements. Service identification is one of the core activities in developing Service oriented systems. To identify proper services, business requirements and business change factors should be analyzed because the ultimate aim of a service oriented system is to achieve business requirements and business agility. We propose a service identification method based on scenario modeling and a conceptual framework to elicit possible business changes. Traceability among business requirements, business changes and the identified services are also supported by our method.

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Wireless Sensor Network for Point Positioning a Falling Rocket Projectile in an Explosive Testing Zone

Wireless Sensor Network for Point Positioning a Falling Rock...

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International Conference on Sensor Technologies and Applications, SensorComm

作者： Hairong Yan Youzhi Xu Zhiguang Wang Embedded Software and System Institute Beijing University of Technology Beijing China School of Electrical Engineering Jönköping University Jonkoping Sweden Computer Science school China University of Petroleum Beijing China

This paper considers the localization of a rocket projectile's landing point in an explosive testing zone using a wireless sensor network. Grid anchor nodes with seismic sensors are arranged in the target area. An algorithm is proposed for the positioning of the grid anchor nodes and for hyperbolic localization. Additionally, a node health report is included in the algorithm for the node destroyed by the rocket projectile. This paper includes simulation results for the hyperbolic localization algorithm and the choice of grid anchor nodes.

关键词： Rockets Projectiles Wireless sensor networks Testing Wireless communication Explosives Accuracy

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Prediction Model for Tiered Accuracy Requirements in Large-scale Object Tracking Sensor Networks

Prediction Model for Tiered Accuracy Requirements in Large-s...

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International Conference on computer and Information Technology (CIT)

作者： Guangcheng Qin Panlong Yang Qiang Chen Hao Yin Kai Lin Institute Communication Engineering People''s Liberation Army University of Science and Technology China Institute of Electronic System Engineering Beijing China Institute Communication Engineering People''s Liberation Army University of Science and Technology Beijing China School of Computer Science & Technolgy Dalian University of Technology China

In large-scale object tracking wireless sensor networks, multiple mobile nodes will bring large amount of communication overheads in maintaining the accuracy of localization tracking, which would possibly affect the collection and dissemination of the tracking data, seriously. Existing seminar works purely focus on achieving optimal tracking accuracy and suffer from large amount of protocol overhead, due to lacking of adaptations on various accuracy requirements for different tracking applications. In this paper, we propose a prediction based object tracking protocol for tiered accuracy requirements. The tired accuracy requirements are perceived by each entity so as to establish a unified predicted model for the moving objects and the sink nodes. Moreover, the network entities could share the corresponding model parameters to others related, thus, all the interested entities use the same model to predict the moving objects and the corresponded sink location, so as to achieve a precise location. In this approach, the system achieves efficient data distribution and information sharing to reduce communication overheads, such that tiered application requirements are satisfied. An optimal model on vehicular mobility in analytical form is made, employing the trace generated by kinematic model and the data collected in real experiments. In that, we set up a simulation environment in evaluating our protocol using Qualnet, a validated commercial simulation platform. Simulation results show that, the proposed algorithm can effectively improve network efficiency and successfully satisfy different level of application requirements.

关键词： Predictive models Data models Accuracy Mathematical model Mobile communication Trajectory Sensors

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Internal model control for hysteretic nonlinear systems based on support vector regression

Internal model control for hysteretic nonlinear systems base...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Wenguang Zhang Jianqin Mao Yanhua Ma Beijing Key Laboratory of Measurement and Control Technology and System for Industrial Process Control & Computer Engineering School North China Electric Power University Beijing China School of Automation Science and Electrical Engineering Beijing Aeronautics and Astronautics University Beijing China

Aim at the hysteretic nonlinearity characteristic of the giant magnetostrictive actuator in control, an internal model control method based on support vector regression is presented in this paper. Its models are built by support vector regression using the input and output data of the actuator and the internal model control is achieved. The simulation results show the method in this paper has better control precision.

关键词： Support vector machines Actuators Automation Data models Computational modeling Hysteresis Magnetostriction

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Scalable embedded Ge-junction vertical-channel tunneling field-effect transistor for low-voltage operation

Scalable embedded Ge-junction vertical-channel tunneling fie...

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IEEE Nanotechnology Materials and Devices Conference (NMDC)

作者： Min-Chul Sun Sang Wan Kim Garam Kim Hyun Woo Kim Jong-Ho Lee Hyungcheol Shin Byung-Gook Park System LSI Division Samsung Electronics Company Limited Yongin si South Korea School of Electrical Engineering and Computer Science Inter-University Semiconductor Research Center Seoul South Korea

While a tunneling field-effect transistor (TFET) is an attractive candidate for sub-20 nm ultra-low-power device, high I ON /I OFF and on-current are rarely reported with the deep-submicron structures. In this study, we propose a practical novel TFET structure with vertical channel and Ge junction, which shows high current ratio, low subthreshold swing and relatively high current even when the minimum device dimension is smaller than 20 nm. To find the optimum design, the off-state injection of a short-channel TFET and optimization of the source-side junction are studied by simulation.

关键词： Tunneling Logic gates Silicon MOSFET circuits Transistors Junctions Doping

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34-fs pulse generation directly from an Er:fiber laser

34-fs pulse generation directly from an Er:fiber laser

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The 5th International Symposium on Ultra-fast Phenomena & Terahertz Waves(第五届超快现象与太赫兹波国际研讨会)

作者： Ding Ma Chun Zhou Yue Cai Weijian Zong Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and NetworksSchool of Electronics Engineering and Computer Science University of Beijing Beijing 100871 P.R.China

We report 34 fs level pulse generation directly from a mode locked Er:fiber laser at a repetition rate of 230 MHz.

关键词： Ultrafast lasers Fiber lasers

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Adaptive step size method for the power system model of dispatcher training simulator

Adaptive step size method for the power system model of disp...

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IEEE General Meeting Power& Energy Society

作者： Pyeong-Ik Hwang Seon-Ju Ahn Seong-Il Hur Yong-Tae Yoon Seung-Il Moon School of Electrical Engineering and Computer Science Seoul National University Seoul South Korea School of Electrical Engineering Myongji University Gyeonggi South Korea Information Technology Department Power System Operation Division Korea Power Exchange Seoul South Korea

Because it is almost impossible to train the dispatchers with real power system, the dispatcher training simulator (DTS) is used for the training. Among various components of the DTS, the power system model (PSM) emulates the dynamic behavior of the power system to calculate the frequency and voltage. In the PSM, the power plants are modeled as differential equations, so the mechanical power of the power plants is calculated by the numerical methods. Conventionally, the fixed step-size algorithm has been used in the PSM, however it has some drawbacks. This paper develops the prototype PSM using the Matlab, and analyzes the problems of the fixed step-size algorithm by comparing the results with those of PSCAD simulation considered as a real system. In order to overcome the limitations, the adaptive step size method for the PSM is proposed by modifying the general adaptive step size method. From the simulation using the proposed method, it is verified that the accuracy of the PSM is increased.

关键词： Load modeling Power system dynamics Prototypes Power generation Numerical models Topology

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Virtual Coach Technology for Supporting Self-Care

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Physical Medicine and Rehabilitation Clinics of North America 2010年第1期21卷 179-194页

作者： Ding, Dan Liu, Hsin-Yi Cooper, Rosemarie Cooper, Rory A. Smailagic, Asim Siewiorek, Dan Department of Rehabilitation Science and Technology University of Pittsburgh Pittsburgh PA 15260 United States Department of Veterans Affairs Human Engineering Research Laboratories VA Pittsburgh Healthcare System Pittsburgh PA 15206 7180 Highland Drive Bldg. 4 2nd Fl. East 151R1-H United States Center for Assistive Technology Pittsburgh PA 15213 200 Lothrop Street Forbes Tower Suite 3010 United States School of Computer Science Institute for Complex Engineered Systems Carnegie Mellon University Pittsburgh PA Hamburg Hall 1217 United States School of Computer Science Carnegie Mellon University Pittsburgh PA Newell-Simon Hall 3519 United States

"Virtual Coach" refers to a coaching program or device aiming to guide users through tasks for the purpose of prompting positive behavior or assisting with learning new skills. This article reviews virtual coach interventions with the purpose of guiding rehabilitation professionals to comprehend more effectively the essential components of such interventions, the underlying technologies and their integration, and example applications. A design space of virtual coach interventions including self-monitoring, context awareness, interface modality, and coaching strategies were identified and discussed to address when, how, and what coaching messages to deliver in an automated and intelligent way. Example applications that address various health-related issues also are provided to illustrate how a virtual coach intervention is developed and evaluated. Finally, the article provides some insight into addressing key challenges and opportunities in designing and implementing virtual coach interventions. It is expected that more virtual coach interventions will be developed in the field of rehabilitation to support self-care and prevent secondary conditions in individuals with disabilities. © 2010 Elsevier Inc.

关键词： Context awareness Disability Intelligent prompting Power wheelchair seating functions Preventive health management Secondary condition Self-care Virtual coach

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