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检索条件"任意字段=2012 2nd International Conference on Computer Application and System Modeling, ICCASM 2012"

共 812 条记录，以下是641-650 订阅

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iTagger: Part-of-speech tagging based on SBCB learning algorithm

iTagger: Part-of-speech tagging based on SBCB learning algor...

引用

2nd international conference on Engineering and Technology Innovation 2012, ICETI 2012

作者： Zeng, Xiao-Dong Chao, Lidia S. Wong, Derek F. He, Liang-Ye Department of Computer and Information Science University of Macau Macau S.A.R. China

ISBN: (纸本)9783037856123

The problem of part-of-speech (POS) tagging or disambiguation is a practical issue in natural language processing (NLP) community, especially in the development of a machine translation system. The performance of POS tagging system may interference the subsequent analytical tasks in the translation process, and thereafter affects the overall translation quality. This paper presents a novel POS tagging system, iTagger, which is developed based on Selecting Base Classifiers on Bagging (SBCB) learning algorithm. In this work, the POS tagging task is regarded as a classification problem. Features such as the surrounding context of ambiguous candidates, n-gram information, lexical items and linguistic clues are used and automatically extracted from the annotated corpus. The proposed system has been compared against two state-of-the-art tagging methods, Hidden Markov Model (HMM) and Maximum Entropy. The empirical results conducted on the corpora of (English) Brown corpus, (Portuguese) Tycho Brahe corpus and the Chinese Tree Bank corpus reveal the competitiveness of iTagger. Moreover, the iTagger has been developed and released to the public as library and tool for various development and application purposes. © (2013) Trans Tech Publications, Switzerland.

关键词： Hidden Markov models

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Synchronization in distributed systems

Synchronization in distributed systems

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2nd international conference on Advances in Computing and Information Technology, ACITY-2012

作者： Sampath, Amritha Tripti, C. Department of Computer Science Rajagiri School of Engineering and Technology Rajagiri valley Cochin India

ISBN: (纸本)9783642315121

In the present scenario, a demand for the highly reliable and synchronous systems is seen. As a result, there has been a gradual shift to distributed systems from the centralized systems. There are few disadvantages for this system too. The most important one is that in a distributed system, the different nodes maintain their own time using local clocks and their time values may not be same for the different nodes. I.e. there is no global clock within the system so that that the various activities in the distributed environment can be synchronized. The various clocks in the system even if set to a common time value at an instant, drift apart due to unavoidable reasons. Hence some kind of continuous mechanism for synchronization is needed so that they can coordinate and work together to achieve the objectives of the distributed system. Two types of synchronization are possible- external synchronization and internal synchronization. In a real time scenario, it is important for the system to be synchronous with each other and with a common external reference time. This is called external synchronization. But in certain systems, it is only necessary for the nodes in the system to be synchronized with each other. This is called internal synchronization. In many applications, the relative ordering of events is more important than actual physical time. Here event ordering is done without clock time values. Hence, depending on the area and type of application, clock synchronization techniques used differs. In certain real time applications, the system requires to be both internally and externally synchronized. In such cases a centralized algorithm called the 'Cristian's' algorithm is used for synchronization. But this algorithm fails in situations where the time server fails. This paper suggests some methods to make the synchronization process distributed so that the disadvantages of the Cristian's algorithm can be nullified. © 2012 Springer-Verlag.

关键词： Synchronization

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Shipboard Aircraft Arresting system modeling and Simulation

Shipboard Aircraft Arresting System Modeling and Simulation

引用

2nd international conference on Instrumentation and Measurement, computer, Communication and Control (IMCCC)

作者： Zhu, Qidan Wen, Zixia Zhang, Zhi Yu, Yongtao Harbin Engn Univ Dept Automat Harbin Peoples R China

ISBN: (纸本)9780769549354

Shipboard arresting gear is a special aero-carrier unit that is designed to provide an efficient arrestment of the deck jet-fighters of masses 15-25 tons with landing velocities between 180 and 240 km/h. In the current paper, a full-scale arresting system model is created. Main elements of the arresting system consist of cables and hydraulic system. The model contains all basic elements of the real prototype and is employed to analyze the dynamic behavior of the arresting gear with different scenarios. The stroke of cam is enlarged to increase the capacity of arresting gear. The finite element methodology is employed to analyze the dynamic behavior of cables. The developed model is used to obtain parameters of the arresting process fighter displacement, velocity, acceleration vs. time, as well as pressure in the hydraulic system and tensile force in the cable.

关键词： modeling and simulation finite element modeling shipboard arresting gear hydraulic system

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The Design and Implementation of 3D Visualization Pipeline Information system Based on 2D Figures

The Design and Implementation of 3D Visualization Pipeline I...

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The 2nd international conference on computer-Aided Design, Manufacturing, modeling and Simulation(CDMMS 2012)

作者： Hong-Yi Li Yue Chen Di Zhao School of Mathematics and System Science Beihang University School of Software Beihang University

ISBN: (纸本)9783037855409

Currently,many designers for pipeline network,such as the municipal drainage pipelines,oil/gas transport pipelines,use Auto CAD to design their drawings which demonstrated in a 2D *** professionals,it's easy to view and modify their *** for common users who usually have little professional knowledge on pipeline design,a 3D scene view is more *** this end,we propose the architecture and implementation of pipeline network information that has facilities such as reconstructing the 3D scene of a pipe network from 2D Auto CAD files(.dwg files).

关键词： computer-Aided Design,Virtual Reality,Pipeline Networks,Dwgdirect,Openscenegraph

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The Research of Heterogeneous CNC Machine Tool DNC Integration system Based on OPC Technology

The Research of Heterogeneous CNC Machine Tool DNC Integrati...

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The 2nd international conference on computer-Aided Design, Manufacturing, modeling and Simulation(CDMMS 2012)

作者： Maoyao Ao Yan Zhao Department of Machinery Guangxi Vocational & Technical College School of Psychology Southwest University Chongqing Municipal Public Security bureau

ISBN: (纸本)9783037855409

Because different manufacturers of CNC machine tool use the different NC system at present,it results the actuality that the CNC machine tool is hard to integrate and *** paper proposed a scheme of DNC integrated system of heterogeneous CNC Machine Tool based on OPC technology,after analyzing OPC interface and industrial Ethernet *** workshop-level experimental platform of DNC system based on Ethernet *** this platform,establish the communication with OPC Server by using VC,realize monitoring and management to the bottom heterogeneous CNC machine *** example proved that the scheme was practical and effective.

关键词： OPC Heterogeneous CNC Machine Tool DNC system

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application and development of RFID technique

Application and development of RFID technique

引用

2012 2nd international conference on Consumer Electronics, Communications and Networks, CECNet 2012

作者： Liu, Chunli Liu, Donghui Department of Computer Engineering CangZhou Normal University CangZhou Hebei China

ISBN: (纸本)9781457714153

Radio Frequency Identification (RFID) is widely used in every area, but its standardization, anti-collision algorithm, and system measurement accuracy still need further improving. systematic study is made in this paper according to the strengths and weaknesses of RFID and its development trend. It also explains the safety of RFID and its strengths over efficient and fast identification algorithm;introduces RFID technology and the combination of internet-of-things, wireless sensors and NFC technologies as well as the application of RFID technology in the fields of retailing, logistics and traffic. Through an aggregate analysis of world manufacturers' application and study of RFID technology, the writer also points out the development trend of RFID technology in our country. © 2012 IEEE.

关键词： Wireless sensor networks

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A CROSS-PLATFORM CONTEXT-AWARE application DEVELOPING FRAMEWORK FOR MOBILE TERMINALS

A CROSS-PLATFORM CONTEXT-AWARE APPLICATION DEVELOPING FRAMEW...

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2012 IEEE 2nd international conference on Cloud Computing and Intelligence systems

作者： Pingyi Wang Jingling Zhao Qing Liao School of Computer Science Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

The increasing number of mobile terminals facilitates the development of context-aware applications. However, developing a context aware application is still a complex work, which involves mechanisms of context acquisition and context processing. In order to release the developer’s burden, many context aware frameworks emerged. But none of them yet has sufficient consideration of mobile environment characteristics. Besides, restricted to the mobile platform, the developed application could not achieve cross-platform deployment. A cross-platform context-aware application developing framework for mobile terminals is proposed in this paper. This framework could shield system differences, centralize context acquisition, context modeling, context storing, context interpretation and context aggregation for many context aware applications on the same terminal. Applying the framework, data of same sensor would not be duplicated processed by many context aware applications. Context aware application would be built faster. And mobile terminal resources would be used more efficiently.

关键词： Context-awareness Cross-platform Mobile terminal Framework

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Location-based service (LBS) falling-detection and alarm system by smartphone

Location-based service (LBS) falling-detection and alarm sys...

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2nd international conference on Engineering and Technology Innovation 2012, ICETI 2012

作者： Lo, Bird C. Department of Computer Science and Information Engineering Minghsin University of Science and Technology Taiwan

ISBN: (纸本)9783037856123

Up to date, smart phone with built-in sensors (tri-accelerometer, GPS) and Internet access has become a useful kit for many purpose using. In this paper, we present the design and the implementation a combine approach for the detection of falls by smartphone. It used analyzing of body postures, mobility and falling location to recognize falls happened. In this paper, we present a system with real-time classification of human movements based on built-in sensor of smartphone. At the same time, it is able to classify the data for falling recognition. In our algorithm, it is not only to analysis of body postures by tri-accelerometer, but also to analysis of falling location by GPS sensor. We used a parameter called falling-risk (FR) to measure falling risk at different location. The FR is based on falling history at GPS location (x, y). It will alarm falling with fall location when falling and it will notice when user entered the high risk area. The major advantage of the proposed system is the novel application of smartphone which already have the necessary sensors and can monitor fall ubiquitously without any additional devices. We develop an Android application that monitors the phone's built-in sensors, detects falls, and generates high risk alerts when user passes through the high risk area. We test the application against a number of Activities of Daily Life (ADLs) and fall events, and present the results. © (2013) Trans Tech Publications, Switzerland.

关键词： Location based services

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Dynamic Simulation of Concrete Pump Truck's Boom system Based on Rigid-flexible Coupling Model

Dynamic Simulation of Concrete Pump Truck's Boom System Base...

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The 2nd international conference on computer-Aided Design, Manufacturing, modeling and Simulation(CDMMS 2012)

作者： Yang Ping Wang Rui Shao Yuhong Lv Pengmin Fujian Chuanzheng Communications College School of Engineering Machinery Chang'an University

The concrete pump truck's boom system of 5 booms is taken as the research object in this *** with finite element theory and multi-body dynamics theory,a rigid-flexible coupling model of concrete pump truck's boom system is established by modal synthesis *** the measured displacement-time curve of turntable as the excitation,the booms' pumping process in horizontal mode is simulated by the dynamic simulation software *** the field experiment results,the rationality of the modal is *** provides an effective method for dynamics analysis and structure improve of the concrete pump truck's boom system.

关键词： Concrete Pump Truck'S Boom,Rigid-Flexible Coupling,Modal Synthesis Method,Dynamic Simulation

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Location Based Computation Sharing Framework for Mobile Devices

Location Based Computation Sharing Framework for Mobile Devi...

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The 2nd international conference on Emerging Trends in computer and Image Processing(ICETCIP’2012);The 2nd international conference on Advancements in Electronics and Power Engineering(ICAEPE’2012);The 2nd international conference on Trends in Mechanical and Industrial Engineering(ICTMIE’2012);The 2nd international conference on Advances in Biotechnology and Pharmaceutical Sciences(ICABPS’2012);The 2nd international conference on Chemical,Biological and Environment Sciences(ICCEBS’2012);The 2nd international conference on Management,Economics and Social Sciences(ICMESS’2012)

作者： Samiul. Islam Boraq. Ammourah Mohamad. Mahmoud Department of Computer Science College of Computer Science and Information System in Najran University MIS department in Salman bin Abdulaziz University

Third generation and fourth generation mobile devices are providing various online services and applications to facilitate users with their rich web interfaces. Limited computing power and shorter battery life of mobile devices caused computation intensive application components to migrate to the external computing resources. By elastic resource provisioning and the ability to support large scale service deployment, mobile cloud computing introduced an attractive platform for offloading the computational processes among mobile devices. In this paper we proposed a location based computation sharing framework for mobile devices in which mobile devices locating in the same cell can share their processing power. We introduced a certification technique by which all mobile devices within 10 meters ranges can share their processing power using Bluetooth technique without traditional 2 step verification process.

关键词： Bluetooth Connectivity, Computational Process Sharing, Mobile Computing, Wireless Ad-hoc Network

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