发布求助
文献互助 智能选刊 最新文献

2007 International Symposium on Information Technology Convergence (ISITC 2007)最新文献

筛选
英文 中文
Birefrigence Optimization Algorithm of the Polarimetric CT System 偏振CT系统的双冷优化算法
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.31
Hyoung-Jun Park, Hyun Jin Kim, Minho Song
{"title":"Birefrigence Optimization Algorithm of the Polarimetric CT System","authors":"Hyoung-Jun Park, Hyun Jin Kim, Minho Song","doi":"10.1109/ISITC.2007.31","DOIUrl":"https://doi.org/10.1109/ISITC.2007.31","url":null,"abstract":"We developed a fiber-optic current sensor system for the over-current protection relay. A spun fiber was employed to eliminate linear birefringence effect, and to compare the efficiency a twisted and a Flint glass fiber were also tested. From the experimental results, we obtained less than 2% of linear error with spun fiber output according to current increases. The SNR at 60 Hz is measured to be more than 55 dB. The spun fiber sensor coil showed the sensitivity of about 6 and 35 dB better than the Flint glass fiber and twisted fiber, respectively.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115802511","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
Computer Simulation Results for a W-CDMA Frequency Synthesizer W-CDMA频率合成器的计算机仿真结果
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.35
Jae Hwan Lee, Hang-Geun Jeong
{"title":"Computer Simulation Results for a W-CDMA Frequency Synthesizer","authors":"Jae Hwan Lee, Hang-Geun Jeong","doi":"10.1109/ISITC.2007.35","DOIUrl":"https://doi.org/10.1109/ISITC.2007.35","url":null,"abstract":"This paper describes the design and simulation of a frequency synthesizer in a standard 0.18 um CMOS technology. The performance of the charge pump is very important in determining the quality of frequency synthesizers. In designing the charge pump, we need to consider various issues such as current mismatch, charge sharing, feed through, and charge injection. This paper focuses on the current mismatch. An LC VCO was used for good phase noise characteristics. It is composed of np-core for negative resistance and p- tail for current source. An accumulation mode MOS varactor is used for frequency tuning, which has wide tuning range. A divider which scales from 423 to 434 is implemented by pulse swallow method. The entire design is verified through extensive computer simulation.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121612577","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
Computer Simulation Performance of Iterative Water-Filling Algorithm for ADSL2+ and VDSL Mixed System ADSL2+和VDSL混合系统迭代充水算法的计算机模拟性能
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.34
Jian Xu, Jongsoo Seo, Lu Xue, S. Song
{"title":"Computer Simulation Performance of Iterative Water-Filling Algorithm for ADSL2+ and VDSL Mixed System","authors":"Jian Xu, Jongsoo Seo, Lu Xue, S. Song","doi":"10.1109/ISITC.2007.34","DOIUrl":"https://doi.org/10.1109/ISITC.2007.34","url":null,"abstract":"Crosstalk is a major issue in modern ADSL and VDSL systems. Static spectrum management (SSM), the traditional way to guarantee spectrum compatibility, employs spectral masks which can be overly restrictive and result in poor performance. In this paper, fixed margin iterative water-filling algorithm is applied in downstream VDSL and ADSL2+ scenario when they are in the same binder. The algorithm can minimize the transmission power and at the same time the overall high-quality service is guaranteed for all the users of the same binder. The simulation results show that ADSL2+ can realize performance gains by up to 80% compared with SSM techniques or ADSL.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122130617","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
An Integrated Simulation Environment Which Automatically Generates and Edits Source Code for Geant4: Geant4Editor 一个自动生成和编辑Geant4源代码的集成仿真环境:Geant4Editor
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.24
Sungsik Shin, A. Kima, Seungwan Kima, Juwhan Song, O. Gwun
{"title":"An Integrated Simulation Environment Which Automatically Generates and Edits Source Code for Geant4: Geant4Editor","authors":"Sungsik Shin, A. Kima, Seungwan Kima, Juwhan Song, O. Gwun","doi":"10.1109/ISITC.2007.24","DOIUrl":"https://doi.org/10.1109/ISITC.2007.24","url":null,"abstract":"Geant4 is a physical library, used for radiation or other physics simulations. To take advantage of the Geant4 library, the user should inherit the classes which are provided in the library and embody the three classes required by C++ language. Because it is usually difficult and takes a lot of time for a physicist to embody these classes, we are developing a user interface system named Geant4Editor in order to provide a more convenient integrated simulation environment in which to edit and generate the Geant4 source code. In this paper, we explore the weak points of the existing programs, and analyze the Geant4 library execution process and mandatory class definition rules, so as to allow the mandatory classes to be generated simply by inputting parameters and to provide a more convenient integrated simulation environment. Geant4Editor is based on Win32, and runs in the Windows environment.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121958957","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
Converting Sensor Data into Ontology Using DOM Model in Home Network 基于DOM模型的家庭网络传感器数据本体转换
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.37
Wontaek Lim, Tam V. Nguyen, M. Yu, Deokjai Choi
{"title":"Converting Sensor Data into Ontology Using DOM Model in Home Network","authors":"Wontaek Lim, Tam V. Nguyen, M. Yu, Deokjai Choi","doi":"10.1109/ISITC.2007.37","DOIUrl":"https://doi.org/10.1109/ISITC.2007.37","url":null,"abstract":"Reasoning the sensor data is necessary in context-awareness of home network. For sensing data usually was sent by hex code, it can't directly reason with this data type. So we convert this sensor data into ontology to reason using DOM of XML. We convert the environments information, temperature, humidity, and time, among many sensors into ontology through receiving sensor data every minute. Through reasoning to use this converting information, we will get more accurate context information.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128093098","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
Segmentation of Medical Image Using a Statistical Technique and Its 3D Visualization 医学图像的统计分割及其三维可视化
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.83
Myungeun Lee, Soonyoung Park, Wanhyun Cho, Soohyung Kim
{"title":"Segmentation of Medical Image Using a Statistical Technique and Its 3D Visualization","authors":"Myungeun Lee, Soonyoung Park, Wanhyun Cho, Soohyung Kim","doi":"10.1109/ISITC.2007.83","DOIUrl":"https://doi.org/10.1109/ISITC.2007.83","url":null,"abstract":"We present an automatic segmentation and its visualization method for medical image. First, the statistical segmentation consists of two steps: number detection of clusters composing an image and parameter estimation of a statistical model. Here we use the morphological operations to determine automatically the number of clusters or objects composing a given image without any prior knowledge and adopt the Gaussian mixture model (GMM) to characterize an image statistically. Next, the Deterministic Annealing Expectation Maximization algorithm is employed to estimate the parameters of the GMM. Finally, we use a modified marching cubes algorithm to visualize the extracted images. The experimental results show that our proposed method can extract and visualize exactly the human organs from the CT image.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123753949","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
Second Order Hold Based Discretization Method of Input Time-Delay Systems 基于二阶保持器的输入时滞系统离散化方法
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.81
Zheng Zhang, K. Chong
{"title":"Second Order Hold Based Discretization Method of Input Time-Delay Systems","authors":"Zheng Zhang, K. Chong","doi":"10.1109/ISITC.2007.81","DOIUrl":"https://doi.org/10.1109/ISITC.2007.81","url":null,"abstract":"Second order hold is a method can provide a high precision for discretization of input-driven nonlinear systems. A new discretization scheme combined second order hold with Taylor-series is proposed. The sampled-data representation and the mathematical structure of the new discretization scheme are explored. Both exact sampled-data representation and approximate sampled-data representation are described in detail. The performance of the proposed discretization procedure is evaluated by simulation studies. Various sampling rates, time-delay values and truncation order of Taylor-series are considered to investigate the proposed method. The results demonstrate that the proposed scheme is practical and is easy to use for time-delay systems. The comparison between second order with first order and zero order is given to show the characteristic of the proposed method.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121475952","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
Hot Spot Prediction Algorithm for Shared Web Caching System Using NN 基于神经网络的共享Web缓存系统热点预测算法
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.53
S. Yoo, K. Chong
{"title":"Hot Spot Prediction Algorithm for Shared Web Caching System Using NN","authors":"S. Yoo, K. Chong","doi":"10.1109/ISITC.2007.53","DOIUrl":"https://doi.org/10.1109/ISITC.2007.53","url":null,"abstract":"As the population of Web grows, network traffic on the World Wide Web increases, which has a great impact on the network utilization. On WWW, there are innumerable objects, popular and unpopular of which the frequently requested object by users is called 'hot spot'. Often hot spot brings an excessive load to the cache server and original server, resulting in a swamped state in the system. In this paper, a hot spot prediction algorithm based on neural network has been suggested to solve the problems induced by hot spots. The hot spot to be requested in the near future will be prefetched into the proxy servers after predicting. Therefore, a faster responding to the users' requests and a higher efficiency of the proxy server can be achieved. Hot spots can be obtained by analyzing the access logs file using the neural network method. A simulator has been developed by using the PERL language in order to validate the performance of the suggested algorithm, through which the hit rate improves and the requests among the shared proxy servers are well load-balanced.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130693437","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: 4
ITU-R Standardization of Digital Performance for Fixed Satellite Services ITU-R固定卫星业务数字性能标准化
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.61
Sooyoung Kim, S. Yeo, Sastri L. Kota
{"title":"ITU-R Standardization of Digital Performance for Fixed Satellite Services","authors":"Sooyoung Kim, S. Yeo, Sastri L. Kota","doi":"10.1109/ISITC.2007.61","DOIUrl":"https://doi.org/10.1109/ISITC.2007.61","url":null,"abstract":"This paper presents recent ITU-R standardization activities on digital performance for fixed satellite services. Recently, a few new research results on the error performance objectives and efficient digital transmission techniques including adaptive transmissions have been reported and they are now reflected to revise ITU-R Recommendations. In this paper, we summarize these activities by detailing the backgrounds and various examples. In addition, we briefly report other related standardization activities and future works under studying.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128308761","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
Improved Construction of Low-Density Parity-Check Codes Based on Lattices 基于格的低密度奇偶校验码的改进构造
2007 International Symposium on Information Technology Convergence (ISITC 2007) Pub Date : 2007-11-23 DOI: 10.1109/ISITC.2007.55
Xiongfei Tao, Jong-man Kim, Weizhong Liu, Li Kong
{"title":"Improved Construction of Low-Density Parity-Check Codes Based on Lattices","authors":"Xiongfei Tao, Jong-man Kim, Weizhong Liu, Li Kong","doi":"10.1109/ISITC.2007.55","DOIUrl":"https://doi.org/10.1109/ISITC.2007.55","url":null,"abstract":"In this paper we construct a class of LDPC codes with girth 10 based on 2-D lattices. The parity check matrix is an incident matrix of lines and points in the lattices. By selection of slope sets, general triangles and quadrangles are removed in the lattices which leads to the corresponding codes have girth no less than 10. The codes are regular, whose column weight is 3. The generated check matrix have quasi-cyclic structure, and the codes show excellent bit error rate(BER) performance over A WGN channels.","PeriodicalId":394071,"journal":{"name":"2007 International Symposium on Information Technology Convergence (ISITC 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132655118","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: 5
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信