Zhang Jian-wu, Yu Cheng-lei, Tang Bin, Ji Ying-ying
Wireless location algorithm based on TOA/TDOA has been researched and compared, and precise ranging technology based on TOA has been analyzed in this paper. In view of the existing location algorithm is always in 2-dimension form, Chan algorithm has been concluded in 3-dimension form and a 3-dimension location method based on TOA is proposed. The method transforms the nonlinear location equation into linear form by using initialization estimation coming from two-step weighed least square, then calculates the location estimation. The method is simple and precise. The simulation about it is given to show its theoretic value.
{"title":"Chan Location Algorithm Application in 3-Dimension Space Location","authors":"Zhang Jian-wu, Yu Cheng-lei, Tang Bin, Ji Ying-ying","doi":"10.1109/CCCM.2008.76","DOIUrl":"https://doi.org/10.1109/CCCM.2008.76","url":null,"abstract":"Wireless location algorithm based on TOA/TDOA has been researched and compared, and precise ranging technology based on TOA has been analyzed in this paper. In view of the existing location algorithm is always in 2-dimension form, Chan algorithm has been concluded in 3-dimension form and a 3-dimension location method based on TOA is proposed. The method transforms the nonlinear location equation into linear form by using initialization estimation coming from two-step weighed least square, then calculates the location estimation. The method is simple and precise. The simulation about it is given to show its theoretic value.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122689803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Baogang Chen, Chengbo Huang, Yong Xu, Jinlong Hu, Shouqiang Liu
In this study, we measure, model and analyze characteristics of traffic flows of P2P application Maze by capturing real traffic from an operational network. Maze is a P2P file-sharing system with a centralized, cluster-based search engine and a social network among peers. We report the models for flow arrival interval, flow size, flow duration and flow rate of Maze traffic flows. With the growing of peer-to-peer traffic, understanding traffic models and characteristics of peer-to-peer applications will benefit network design, traffic control procedure as well as network simulation.
{"title":"Measurement and Analysis of Peer-to-Peer Application Traffic Characteristics","authors":"Baogang Chen, Chengbo Huang, Yong Xu, Jinlong Hu, Shouqiang Liu","doi":"10.1109/CCCM.2008.382","DOIUrl":"https://doi.org/10.1109/CCCM.2008.382","url":null,"abstract":"In this study, we measure, model and analyze characteristics of traffic flows of P2P application Maze by capturing real traffic from an operational network. Maze is a P2P file-sharing system with a centralized, cluster-based search engine and a social network among peers. We report the models for flow arrival interval, flow size, flow duration and flow rate of Maze traffic flows. With the growing of peer-to-peer traffic, understanding traffic models and characteristics of peer-to-peer applications will benefit network design, traffic control procedure as well as network simulation.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131479174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
By combining visual preview kinematics, dynamic equation of steering system and 2-DOF steering dynamistic model of 4WS, we establish the two degree of freedom model of four-wheel steering vehicle. And then the switching hyper plane is designed by applying the optimal control theory. During the change of parameter is little, 4WS steering performance is carried out by adopting sliding variable structure controller. To improve the steering performance of 4WS, especially state variables convergent velocity, Kalman filter for 4WS is designed. And the robust optimal controller is designed for model and parameter is uncertainty. The simulation results show that the controller designed by the proposed method has good robustness; it can easily attenuate the change and uncertainty of model.
{"title":"Dynamics Simulation on Control Technology for 4WS Vehicle Steering Performance","authors":"Zhang Rong-hui, Jia Hong-guang, Chen Tao","doi":"10.1109/CCCM.2008.57","DOIUrl":"https://doi.org/10.1109/CCCM.2008.57","url":null,"abstract":"By combining visual preview kinematics, dynamic equation of steering system and 2-DOF steering dynamistic model of 4WS, we establish the two degree of freedom model of four-wheel steering vehicle. And then the switching hyper plane is designed by applying the optimal control theory. During the change of parameter is little, 4WS steering performance is carried out by adopting sliding variable structure controller. To improve the steering performance of 4WS, especially state variables convergent velocity, Kalman filter for 4WS is designed. And the robust optimal controller is designed for model and parameter is uncertainty. The simulation results show that the controller designed by the proposed method has good robustness; it can easily attenuate the change and uncertainty of model.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133187984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
According to 3G standard, the communicating bandwidth of mobile devices is 2Mbps, which makes it possible to realize 3G faced P2P e-commerce service among mobile devices. In this paper, the author mainly solved the problem of how to apply mobile P2P technology into modern e-commerce platform. Then, introduced the actuality of modern e-commerce in use and the system architecture of a 3G faced mobile P2P e-commerce system. At last, expatiate the business flow of the new platform.
{"title":"EPMD: A 3G Faced P2P E-Commerce Platform for Mobile Devices","authors":"Lei Wang","doi":"10.1109/CCCM.2008.193","DOIUrl":"https://doi.org/10.1109/CCCM.2008.193","url":null,"abstract":"According to 3G standard, the communicating bandwidth of mobile devices is 2Mbps, which makes it possible to realize 3G faced P2P e-commerce service among mobile devices. In this paper, the author mainly solved the problem of how to apply mobile P2P technology into modern e-commerce platform. Then, introduced the actuality of modern e-commerce in use and the system architecture of a 3G faced mobile P2P e-commerce system. At last, expatiate the business flow of the new platform.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134121741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An observation quality evaluation system for onboard dual frequency GPS is presented in this paper. We investigate how to evaluate the quality of onboard dual frequency kinematic GPS receiver using in-flight observations, and provide several indices of onboard observation quality evaluation. To come over high dynamic characteristics of onboard observations, we design an efficient method of outlier elimination and cycle slip detection. Then via linear combination of original observations, the kinematic observations noise is extracted, and the observation quality is evaluated. Further more, we provide an algorithm to compute the correlation of different types of observations, and analyze the relation between the observation quality and sightline direction. We achieve a series of reliable quality evaluation results by experiments on the data from CHAMP satellite and provide reasonable explanation. The results of CHAMP data analysis contribute to better understanding of receivers and applications of GPS.
{"title":"Quality Evaluation of Onboard Dual Frequency Kinematic GPS Observations","authors":"De-feng Gu, Lei Sun, Dong-yun Yi","doi":"10.1109/CCCM.2008.133","DOIUrl":"https://doi.org/10.1109/CCCM.2008.133","url":null,"abstract":"An observation quality evaluation system for onboard dual frequency GPS is presented in this paper. We investigate how to evaluate the quality of onboard dual frequency kinematic GPS receiver using in-flight observations, and provide several indices of onboard observation quality evaluation. To come over high dynamic characteristics of onboard observations, we design an efficient method of outlier elimination and cycle slip detection. Then via linear combination of original observations, the kinematic observations noise is extracted, and the observation quality is evaluated. Further more, we provide an algorithm to compute the correlation of different types of observations, and analyze the relation between the observation quality and sightline direction. We achieve a series of reliable quality evaluation results by experiments on the data from CHAMP satellite and provide reasonable explanation. The results of CHAMP data analysis contribute to better understanding of receivers and applications of GPS.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133380111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The bilingual translation individual search engine is a kind of Web application program which integrated the functions of bilingual translation and personalized search engine. This paper introduced the theory of bilingual translation and personalized search engine, and then discussed the design and implementation of personalized search engine on bilingual translation.
{"title":"The Design and Implementation of Personalized Search Engine Based on Bilingual Translation","authors":"Li Dongfei, Duan Jianguo","doi":"10.1109/CCCM.2008.19","DOIUrl":"https://doi.org/10.1109/CCCM.2008.19","url":null,"abstract":"The bilingual translation individual search engine is a kind of Web application program which integrated the functions of bilingual translation and personalized search engine. This paper introduced the theory of bilingual translation and personalized search engine, and then discussed the design and implementation of personalized search engine on bilingual translation.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134098565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
XML datasets may contain redundant information due to some anomaly functional dependencies among elements and attributes just as those in relational database schema. This paper proposes a new concept of XML functional dependency based on constraint-tree model. An algorithm is given to remove data redundancies in XML datasets, in which the above new XML functional dependency and dataset itself are together applied.
{"title":"Removing XML Data Redundancies by Constraint-Tree-Based Functional Dependencies","authors":"Teng Lv, Ping Yan","doi":"10.1109/CCCM.2008.140","DOIUrl":"https://doi.org/10.1109/CCCM.2008.140","url":null,"abstract":"XML datasets may contain redundant information due to some anomaly functional dependencies among elements and attributes just as those in relational database schema. This paper proposes a new concept of XML functional dependency based on constraint-tree model. An algorithm is given to remove data redundancies in XML datasets, in which the above new XML functional dependency and dataset itself are together applied.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134419012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Routing problem is one of the most important issues to a wireless sensor network (WSN), and multicast communication has become necessary to support some new applications. In the paper, we propose an energy-aware multicast routing algorithm for WSNs. The algorithm is based on geographic routing, and defines the multicast region as rectangle that has smallest area but covers all destination nodes, where an access point is selected as a gateway. The whole routing process includes two phases. The first phase is to seek a minimal energy path from the sink to the access point based on the idea of dynamic programming. The second phase is to search for a broadcast tree between the access point and the destination nodes in the multicast region. Experiments indicate that our algorithm has better performance on energy expends and success rate of tree setup.
{"title":"An Energy-Efficiency Multicast Routing Algorithm in Wireless Sensor Networks","authors":"Wang Xiangli, L. Layuan, W. Wenbo","doi":"10.1109/CCCM.2008.239","DOIUrl":"https://doi.org/10.1109/CCCM.2008.239","url":null,"abstract":"Routing problem is one of the most important issues to a wireless sensor network (WSN), and multicast communication has become necessary to support some new applications. In the paper, we propose an energy-aware multicast routing algorithm for WSNs. The algorithm is based on geographic routing, and defines the multicast region as rectangle that has smallest area but covers all destination nodes, where an access point is selected as a gateway. The whole routing process includes two phases. The first phase is to seek a minimal energy path from the sink to the access point based on the idea of dynamic programming. The second phase is to search for a broadcast tree between the access point and the destination nodes in the multicast region. Experiments indicate that our algorithm has better performance on energy expends and success rate of tree setup.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134568877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To resolve the problem of the frequency selective fading and intersymbol interference (ISI) caused by data transmission in channel, this study researches on multicarrier spread spectrum technique. According to the special structure of multicarrier direct sequence code division multiple access (MC-DS-CDMA,) system, this study analyses the relation of parameters configure and resumable path numbers, and the performance of system in different parameters configure and multi-user. By the simulating and comparing of the same bandwidth and measure arithmetic at last, it can obtain better performance than the direct sequence CDMA (DS-CDMA, direct sequence code division multiple access) and greatly promote the capacity of anti-MAI (multiple access interference) and anti-ISI in the process of transmission.
{"title":"Study on Multicarrier Spread Spectrum in PLC","authors":"Cuiru Wang, Xiangbing Yu","doi":"10.1109/CCCM.2008.38","DOIUrl":"https://doi.org/10.1109/CCCM.2008.38","url":null,"abstract":"To resolve the problem of the frequency selective fading and intersymbol interference (ISI) caused by data transmission in channel, this study researches on multicarrier spread spectrum technique. According to the special structure of multicarrier direct sequence code division multiple access (MC-DS-CDMA,) system, this study analyses the relation of parameters configure and resumable path numbers, and the performance of system in different parameters configure and multi-user. By the simulating and comparing of the same bandwidth and measure arithmetic at last, it can obtain better performance than the direct sequence CDMA (DS-CDMA, direct sequence code division multiple access) and greatly promote the capacity of anti-MAI (multiple access interference) and anti-ISI in the process of transmission.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"348 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134387490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wei Zheng, Chaokun Wang, Dapeng Zhao, Shengfei Shi, Jianmin Wang
Mobile environment has been one of focuses of computing, communication and management. Mobile review ranking problem, for the first time, is brought out in this paper. Also, a novel ranking algorithm, TiCom, is proposed for mobile review ranking. TiCom is based on the idea of time compensation, and is used to prevent fresh voting item from being ranked too high or too low. Experimental results show that TiCom effectively improves the review process, e.g. music review ranking, especially in mobile environments.
{"title":"TiCom: A Time-Compensation Based Review Ranking Algorithm for Mobile Clients","authors":"Wei Zheng, Chaokun Wang, Dapeng Zhao, Shengfei Shi, Jianmin Wang","doi":"10.1109/CCCM.2008.363","DOIUrl":"https://doi.org/10.1109/CCCM.2008.363","url":null,"abstract":"Mobile environment has been one of focuses of computing, communication and management. Mobile review ranking problem, for the first time, is brought out in this paper. Also, a novel ranking algorithm, TiCom, is proposed for mobile review ranking. TiCom is based on the idea of time compensation, and is used to prevent fresh voting item from being ranked too high or too low. Experimental results show that TiCom effectively improves the review process, e.g. music review ranking, especially in mobile environments.","PeriodicalId":326534,"journal":{"name":"2008 ISECS International Colloquium on Computing, Communication, Control, and Management","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133490364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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