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2008 International Symposium on Communications and Information Technologies最新文献

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Link Completion using Prediction by Partial Matching 使用部分匹配预测的链路完成
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700278
P. Chaiwanarom, C. Lursinsap
{"title":"Link Completion using Prediction by Partial Matching","authors":"P. Chaiwanarom, C. Lursinsap","doi":"10.1109/ISCIT.2008.4700278","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700278","url":null,"abstract":"Prediction by partial matching (PPM) is typically used as a powerful method for data compression. Recently, PPM was applied to solve link prediction problem, e. g., predictive prefetching on the Web. Link completion is a link analysis problem and is almost identical to link prediction but harder and more general. This research applies PPM to impute the missing links in single (directed) graph-structured data model with node and link labels. The experiments use the co-authorship dataset for case-study. Our proposed algorithm not only uses original PPM forward method but also PPM backward and hybrid methods. The algorithm can predict any missing position at any position of a given query link. The experimental results show the prediction accuracy in several dimensions depending on the testing data.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"79 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120856126","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}
引用次数: 3
A Newly Proposed Bandwidth Allocation Algorithm for IEEE 802.16 Wireless Access Systems 一种新的IEEE 802.16无线接入系统带宽分配算法
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700150
C. Liang, Shou-Kuo Shao, Jen-Chieh Yu, Jung-Shyr Wu
{"title":"A Newly Proposed Bandwidth Allocation Algorithm for IEEE 802.16 Wireless Access Systems","authors":"C. Liang, Shou-Kuo Shao, Jen-Chieh Yu, Jung-Shyr Wu","doi":"10.1109/ISCIT.2008.4700150","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700150","url":null,"abstract":"In this paper, we propose a new packet scheduling algorithm for IEEE 802.16 wireless access systems running time division duplex (TDD) mode. We compare the performance of the proposed algorithm to others in terms of bandwidth and fairness in details. The simulation results show that not only the newly proposed algorithm can handle the dynamic bandwidth allocation to achieve higher throughput, but also it can guarantee the QoS support and provide better fairness.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125102866","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}
引用次数: 6
Online Unconstrained Handwritten Thai Character Recognition Using Multiple Representations 使用多重表示的在线无约束手写泰文字符识别
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700169
K. Bounnady, B. Kruatrachue, T. Matsuura
{"title":"Online Unconstrained Handwritten Thai Character Recognition Using Multiple Representations","authors":"K. Bounnady, B. Kruatrachue, T. Matsuura","doi":"10.1109/ISCIT.2008.4700169","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700169","url":null,"abstract":"This paper proposes an unconstrained handwritten Thai character recognition method using multiple representations. The proposed method can recognize different handwritten Thai characters having small curve segments with clockwise and counter clockwise directions, although the conventional method such as the elastic matching method was difficult to recognize them. As the experimental results, the recognition rate was 97.50% and the recognition time (average) using the PC with 1.4 GHz Pentium 4 was 0.01 second.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125115950","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}
引用次数: 7
Novel Multiplierless FPGA Implementation of CDMA 2000 Baseband Filter CDMA 2000基带滤波器的新型无乘法器FPGA实现
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700200
D. Romero, G. Dolecek
{"title":"Novel Multiplierless FPGA Implementation of CDMA 2000 Baseband Filter","authors":"D. Romero, G. Dolecek","doi":"10.1109/ISCIT.2008.4700200","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700200","url":null,"abstract":"In CDMA (Code Division Multiple Access) systems, a baseband digital bandlimiting filter is required to achieve zero Inter-Symbol Interference (ISI). This paper presents an efficient implementation of a CDMA 2000 baseband filter based on a Reconfigurable Multiplier Blocks (ReMB). The foundations of the new structure are a modified Interpolated Finite Impulse Response (IFIR) structure and rounding technique. This choice of ReMB yields a multiplier free structure with less implementation resources than previous designs.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123757111","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}
引用次数: 2
An Effective Safety Alert Broadcast Algorithm for VANET 一种有效的VANET安全警报广播算法
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700192
Kanitsom Suriyapaibonwattana, Chotipat Pomavalai
{"title":"An Effective Safety Alert Broadcast Algorithm for VANET","authors":"Kanitsom Suriyapaibonwattana, Chotipat Pomavalai","doi":"10.1109/ISCIT.2008.4700192","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700192","url":null,"abstract":"VANET has become an interesting research field because we can get a lot of benefit from VANET such as to enhance road safety, reduce traffic congestion and etc. However VANET has some drawbacks such as broadcast storm disrupting network communication, rapid topology changes. These problems need solutions to improve VANET's performance. In this paper we propose a new approach to reduce broadcast storm and improve performance for safety alert application in VANET. Finally we compare of the proposed algorithm performance the current standard approach.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117091205","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}
引用次数: 89
Simulation of Flow Velocity Distribution Control in Separator of a Polymer Electrolyte Fuel Cell 聚合物电解质燃料电池分离器流速分布控制仿真研究
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700257
T. Nakpipat, T. Kayashima, H. Ennoji, T. Iijima
{"title":"Simulation of Flow Velocity Distribution Control in Separator of a Polymer Electrolyte Fuel Cell","authors":"T. Nakpipat, T. Kayashima, H. Ennoji, T. Iijima","doi":"10.1109/ISCIT.2008.4700257","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700257","url":null,"abstract":"A number of researches on a small fuel cell have been studied to use as a power supply for portable information and communication equipment like laptop computer, cellular phone etc because fuel cell can use for long time compared with conventional batteries. In order to make small fuel cell, it is useful to improve the efficiency of electric-chemical reaction in separator of a fuel cell. Flow velocity distribution of gas like oxygen and hydrogen has important role for increasing efficiency of fuel cell. It is necessary to clarify the flow in separator. In this study, first validity of numerical analysis result is confirmed compared with experimental result. Flow velocity and pressure distributions for different shape of manifold are examined in detail by numerical analysis by using CFD (computational fluid dynamics) code. Effect of Reynolds number on flow velocity distribution is also made clear.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130486505","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}
引用次数: 0
Development of Inverted Pendulum System at KMITL KMITL倒立摆系统的研制
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700220
P. Pannil, A. Klaeoyotha, P. Ukakimaparn, T. Trisuwannawat, K. Tirasesth, N. Kominet
{"title":"Development of Inverted Pendulum System at KMITL","authors":"P. Pannil, A. Klaeoyotha, P. Ukakimaparn, T. Trisuwannawat, K. Tirasesth, N. Kominet","doi":"10.1109/ISCIT.2008.4700220","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700220","url":null,"abstract":"This paper presents the development of Inverted Pendulum System at King Mongkut's Institute of Technology Ladkrabang (KMITL), including the designing, construction and control system design. The stabilizing of an unstable system in optimal control scheme via state-space approach is applied. The LQG controller design examples including the addition of the quadratic derivatives of state variables term in the usual standard performance index for linear quadratic Gaussian optimal control as an extra weighting function to play the role in swing suppressor is presented. Finally, a new inverted pendulum system nearly SEGWAY function is shown in this paper.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"432 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125758950","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}
引用次数: 2
Self-mixing DFB Velocimeter with 3-dB Fiber Coupler 带3db光纤耦合器的自混频DFB测速仪
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700268
N. Igari, O. Mikami
{"title":"Self-mixing DFB Velocimeter with 3-dB Fiber Coupler","authors":"N. Igari, O. Mikami","doi":"10.1109/ISCIT.2008.4700268","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700268","url":null,"abstract":"Two beam irradiation scheme enables Doppler velocity measurement using a laser diode without the information of the irradiation angle. By combining the self-mixing effect of a laser diode and the two beam irradiation, the measurement system can be very simple and compact. In this paper, this scheme was demonstrated by using a pig-tail 1.55 pm DEB laser diode and a 3-dB fiber coupler. It was confirmed that the velocity measurement with high precision was possible without the irradiation angle information.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131835570","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}
引用次数: 1
Analysis on the Compatibility between UWB and Narrowband Wireless Communication Systems 超宽带与窄带无线通信系统的兼容性分析
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700261
Shubin Wang, Zheng Zhou, Wei-xia Zou, Qijun Song, Y. Ye
{"title":"Analysis on the Compatibility between UWB and Narrowband Wireless Communication Systems","authors":"Shubin Wang, Zheng Zhou, Wei-xia Zou, Qijun Song, Y. Ye","doi":"10.1109/ISCIT.2008.4700261","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700261","url":null,"abstract":"The potential interference of ultra wideband (UWB) on existing narrowband wireless communication systems must be analyzed before it is applied, so the paper uses a method based on the physical layer model to analyze the compatibility of direct-sequence ultra wideband (DS-UWB) and multi-band ultra wideband (MB-UWB) on several narrowband victim systems. Based on the physical layer models of PAM-DS-UWB and PPM-DS-UWB and MB-UWB and these victim systems, depended on the communication condition of victim systems, the power restrictions of UWB are obtained on the operating frequency band of N-CDMA, GSM, WLAN systems. The results can offer a solution for the compatibility between UWB and these victim systems.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115840232","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}
引用次数: 2
An Improved Design for Speech Denoising 一种改进的语音去噪设计
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700170
Zhou Kong, Yujun Liu, Kesheng Liu, Meilei Jiang
{"title":"An Improved Design for Speech Denoising","authors":"Zhou Kong, Yujun Liu, Kesheng Liu, Meilei Jiang","doi":"10.1109/ISCIT.2008.4700170","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700170","url":null,"abstract":"In high-noise environment, the background noises have greatly bad influence on the speech recognition and its transmission quality. The speech extraction and the noise reduction are long-term questions which the communication system has not solved effectively all the while. In this paper, we propose an improved system solution based on the combination of the bone-conduction sensor, a digital signal processor contained denoising algorithms and an active noise reduction part. At the beginning, the bone-conduction sensor is used to gather the voice. Next, the collected noisy speech signal is enhanced with spectral subtraction algorithm. Then the enhanced signal is detected with the improved short-time energy voice activity detection algorithm based on the Mel frequency. Finally we employ the ANR technology in the receiver. We have designed a prototype system based on the wireless platform. The results of tests show that it achieves better progress in anti-noise performance.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124241898","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}
引用次数: 0
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