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A Wireless Cache Adaptive Invalidation Algorithm In connection and reconnection periods 一种无线缓存自适应连接和重连接失效算法
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320478
A. El-Desouky, H. Ali, E. El-Shafaiy
{"title":"A Wireless Cache Adaptive Invalidation Algorithm In connection and reconnection periods","authors":"A. El-Desouky, H. Ali, E. El-Shafaiy","doi":"10.1109/ICCES.2006.320478","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320478","url":null,"abstract":"The basic cache consistency strategy is the use of periodic invalidation reports (IRs) broadcast by the server. Recently, the addition of updated invalidation reports (UIR) has been proposed. The IR+UIR scheme achieves a much shorter query delay than the basic IR scheme. Previous researches were based on two impractical simplifying assumptions: 1) broadcast traffic is error-free and 2) no other downlink traffic exists in the system. IR partitioning reconstruction lifts these two assumptions on the basic IR and IR+UIR. The (IR partitioning, reconstruction) achieves the following 1) reduces the probability of corruption in IR, 2) improves channel utilization, 3) reduces the average delay in other downlink traffic. However, there are still some drawbacks. One of the drawbacks is the problem with long disconnection. The major contribution for this paper is to propose an adaptive cache invalidation report in the server either broadcasting invalidation reports segments (IRseg+UIR) or bit sequences (BSs) based on the client disconnection time while spending little uplink and downlink cost. Simulation results have shown, and minimized query delay and data packet delay and improved the number of uplink per successful query using the proposed algorithm","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128875583","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
Hierarchical Fuzzy Controller for Robot Manipulator 机器人机械臂的层次模糊控制器
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320421
A. Abdel Hadi, A. Elshafei
{"title":"Hierarchical Fuzzy Controller for Robot Manipulator","authors":"A. Abdel Hadi, A. Elshafei","doi":"10.1109/ICCES.2006.320421","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320421","url":null,"abstract":"Adaptive fuzzy controllers are potential candidates for controlling robot arms. However, traditional fuzzy controllers suffer from the rule explosion phenomenon. We propose here a hierarchical scheme to implement the fuzzy system and consequently relax the rule explosion problem. Furthermore, since payloads are normally varying, robotic models are uncertain. We propose a fuzzy-logic based dynamic observer to estimate the modeling uncertainties and external disturbances. The estimated model is incorporated within the control law to guarantee an acceptable tracking performance. We prove that the proposed adaptive fuzzy controller assures that all signals are uniformly ultimately bounded. Simulation results of a two-link robot arm are reported to confirm the validity of our theoretical results.","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116760245","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
Design and Realization of Data Warehouse for Coastal Restoration 海岸带修复数据仓库的设计与实现
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320492
P. Kuntala, C.-H.H. Chu, V. Raghavan
{"title":"Design and Realization of Data Warehouse for Coastal Restoration","authors":"P. Kuntala, C.-H.H. Chu, V. Raghavan","doi":"10.1109/ICCES.2006.320492","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320492","url":null,"abstract":"The goal of this paper is to propose a practical data warehouse model for the coastal restoration analysis. Coastal restoration practitioners are developing new and innovative ways to increase the efficiency and success of restoration efforts. These new methods range considerably in their scale of application, from addressing small, site-specific issues, to having a larger, regional or national focus. The proposed design of the data warehouse improves the decision capabilities of the existing independent coastal restoration decision support systems. The unified model also allows flexibility of adding new restoration projects in future. In this paper, we first try to identify the data warehousing design implications, and propose a multidimensional spatial model that supports the analyses. We then present sample queries, and define measures by which the coastal restoration data model can be evaluated","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128952027","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
Enhancing the Update Procedure of Neuro - Fuzzy Modules Used for Multi-Sensor Navigation Systems 多传感器导航系统中神经模糊模块更新程序的改进
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320488
A. Noureldin
{"title":"Enhancing the Update Procedure of Neuro - Fuzzy Modules Used for Multi-Sensor Navigation Systems","authors":"A. Noureldin","doi":"10.1109/ICCES.2006.320488","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320488","url":null,"abstract":"Land vehicles rely mainly on Global Positioning System (GPS) to provide its position with consistent accuracy. However, GPS receivers may encounter frequent GPS outages within urban areas where satellite signals are blocked. In order to overcome this problem, GPS is usually combined with inertial sensors (accelerometers and gyroscopes) mounted inside the vehicle to obtain a reliable navigation solution, especially during GPS outages. Neuro-fuzzy modules were used to fuse data from GPS and inertial sensors in real-time. This research optimizes the operation of these modules by implementing a temporal window-based cross-validation approach during the update procedure. A field test data was used to examine the performance of the proposed method and the results discuss the merits and the limitations of the proposed technique.","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123913838","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
Indirect Adaptive Fuzzy Coordinated Excitation and SVC Control for Multi-Machine Power System 多机电力系统的间接自适应模糊协调激励与SVC控制
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320422
H. Yousef, M. Wahba, B. Bouchiba
{"title":"Indirect Adaptive Fuzzy Coordinated Excitation and SVC Control for Multi-Machine Power System","authors":"H. Yousef, M. Wahba, B. Bouchiba","doi":"10.1109/ICCES.2006.320422","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320422","url":null,"abstract":"Coordinated control scheme for generator excitation and static VAR compensator (SVC) using an indirect adaptive fuzzy logic control (IAFLC) of multi-machine power systems based on multi-input-multi-output feedback linearization technique is developed in this paper. The power system considered in this paper consists of two generators and infinite bus connected through a network of transformers and transmission lines. The fuzzy controller is constructed from fuzzy feedback linearization controller whose parameters are adjusted indirectly from the estimates of plant parameters. The adaptation law adjusts the controller parameters on-line so that the plant outputs tracks the reference model outputs. Simulation results show that the proposed IAFLC controller, compared with a controller based on traditional linearization technique enhances the transient stability of the power system under sever abnormalities","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123997693","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
Effect of the Sampling Time on the Accuracy of Estimating the Frequencies of Multiple Sinusoids 采样时间对多重正弦波频率估计精度的影响
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320469
M. H. El-Shafey
{"title":"Effect of the Sampling Time on the Accuracy of Estimating the Frequencies of Multiple Sinusoids","authors":"M. H. El-Shafey","doi":"10.1109/ICCES.2006.320469","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320469","url":null,"abstract":"The accuracy of the estimates of the frequencies of multiple sinusoids in noise depends on many factors. Among these factors are the signal to noise ratio, the estimation technique, the number of sinusoids and their relative values. An estimation technique was suggested recently that yields the required frequencies as the generalized eigenvalues of two matrices formed from samples of the sinusoids and a filtered signal of these sinusoids. It was found that the sampling time has a profound effect on the accuracy of the resulting estimates. Recent interest in eigenstructure techniques in engineering applications led to increasing interest in the mathematical literature addressing the generalized eigenproblem. Recent studies exposed the relation between the condition of the generalized eigenproblem and the condition of a corresponding Vandermonde matrix. In this paper it is shown that the condition of the Vandermonde matrix can be influenced by the choice of the sampling time, consequently improving the generalized eigenproblem condition and making the frequency estimation technique more immune to noise","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128436756","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
An Automatic Label Extraction Technique for Domain-Specific Hidden Web Crawling (LEHW) 面向特定领域的隐式网络爬行(LEHW)自动标签提取技术
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320490
A. El-Desouky, H. Ali, S. El-Ghamrawy
{"title":"An Automatic Label Extraction Technique for Domain-Specific Hidden Web Crawling (LEHW)","authors":"A. El-Desouky, H. Ali, S. El-Ghamrawy","doi":"10.1109/ICCES.2006.320490","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320490","url":null,"abstract":"General-purpose search engines (e.g. Google and Yahoo) ignore valuable data that represent 80% of the content on the Web, this portion of Web called hidden Web (HW). Pages in the hidden Web are dynamically generated in response to queries submitted via the search forms. In this paper, a new algorithm for extracting labels from multi-attribute (M-A) search form fields is proposed. A technique for automatic query generation for single-attribute (S-A) search forms is also provided in order to enhance the performance of the overall domain-specific hidden Web crawlers. The innovation of (LEHW) algorithm is its capability to distinguish between (S-A) and (M-A) forms; so that the capability of dealing with both of them, unlike most hidden Web crawlers that ignore either of them. Embedding of the proposed algorithm within the overall framework of the HW crawler is evaluated through experiments using real Web sites. The preliminary results demonstrate the accuracy and precision of the proposed approach for most of the sites considered","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"41 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126226484","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
Comparative Study on Super-Resolution of Images 图像超分辨率的比较研究
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320451
I. Ibrahim, M.K. Ahmed, Z. Nossair, F. A. Allam
{"title":"Comparative Study on Super-Resolution of Images","authors":"I. Ibrahim, M.K. Ahmed, Z. Nossair, F. A. Allam","doi":"10.1109/ICCES.2006.320451","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320451","url":null,"abstract":"Super-resolution of images has become a very important research topic nowadays. There are many algorithms that have been developed to enhance the resolution of images. In this paper, we undertake a study for evaluating and comparing three of these algorithms. These three algorithms are: neural network algorithm, wavelet extrema extrapolation algorithm, and hallucinating faces algorithm. Our study indicated that: the better performance comes at the expense of higher complexity, large database, and more computational time. The hallucinating faces algorithm gives the largest peak signal to noise ratio (PSNR) when magnifying low dimensional faces and gives better output when the database contains larger number of images. The neural network algorithm gives better results for high dimensional faces, but it needs long time for training. The wavelet extrema extrapolation algorithm gives better results for high dimensional faces than for low dimensional faces. The performance of these three algorithms gets better as the dimension of input faces gets higher and only the hallucinating faces can give good results for lower dimensional faces such as 64times48 pixels","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132385675","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
MANAGE1: New Stream Cipher for Data Encryption in CDMA Wireless Networks MANAGE1: CDMA无线网络中数据加密的新流密码
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.1109/ICCES.2006.320446
Nabil Hamdy, Tarek El Megeed, Ahmed Hamad, Marian Kamal
{"title":"MANAGE1: New Stream Cipher for Data Encryption in CDMA Wireless Networks","authors":"Nabil Hamdy, Tarek El Megeed, Ahmed Hamad, Marian Kamal","doi":"10.1109/ICCES.2006.320446","DOIUrl":"https://doi.org/10.1109/ICCES.2006.320446","url":null,"abstract":"Even though that CDMA 2000 wireless networks is being widely deployed as a cellular digital standard around the world, it has some hidden vulnerabilities when concerned with the security issues. The main focus of this paper is to propose MANAGE1 as a design of a new stream cipher system to be used for data encryption in CDMA wireless networks. This new cipher system is intended to replace the offered data encryption algorithm in CDMA networks known as ORYX. The proposed cipher system is being assessed from different aspects. The first aspect addresses the period and linear complexity profiles of the generated keystream. The second is the statistical properties of the keystream, which are being tested using the standard statistical tests. It is shown that MANAGE1 cipher system improves the practical security over the ORYX, thus ensuring that data security in CDMA networks becomes more reliable to suit the high demand of secure data transmissions in the next generation of wireless communications","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115758221","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
New Approximate Strategies for Playing Sum Games Based on Subgame Types 基于子博弈类型的和博弈新近似策略
2006 International Conference on Computer Engineering and Systems Pub Date : 2006-11-01 DOI: 10.3233/ICG-2006-29403
M. M. Zaky, Cherif R. S. Andraos, S. A. Ghoneim
{"title":"New Approximate Strategies for Playing Sum Games Based on Subgame Types","authors":"M. M. Zaky, Cherif R. S. Andraos, S. A. Ghoneim","doi":"10.3233/ICG-2006-29403","DOIUrl":"https://doi.org/10.3233/ICG-2006-29403","url":null,"abstract":"In this work, we investigate the potential of combining artificial intelligence (AI) tree-search algorithms with the algorithms of combinatorial game theory to provide more efficient strategies for playing sum games based on subgame types. Two new approximate strategies are developed and tested using a specified game model. Both strategies achieve higher performance than approximate strategies previously proposed in literature without being computationally more expensive","PeriodicalId":261853,"journal":{"name":"2006 International Conference on Computer Engineering and Systems","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115561165","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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