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A fuzzy inference system applied to defect detection in flat steel production

A fuzzy inference system applied to defect detection in flat...

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Alice Borselli Valentina Colla Marco Vannucci Marco Veroli Communication and Perception Engineering PERCRO Laboratory Centre of Excellence of Information Pontedera Italy Department of Computer Science and System Engineering Antonio Ruberti University of Roma La Sapienza Rome Italy

Recently in many industrial fields the exploitation of vision systems for quality control had a considerable increase, which is mainly due to the technological progress experienced by such systems, that, with respect to the past, made their performance more appealing and more reliable while the associated costs are decreased. The advantages of these kind of systems in terms of savings in human resources and improved quality monitoring have become far more evident, by encouraging their adoption in a wide variety of production cycles. The present paper deals with the elaboration and information extraction from images, that represent portions of the surface of flat steel products, and describes an algorithm for defect detection and classification. The overall classification procedure is composed of a preliminary part that is mostly related to image processing and analysis, which aims at pointing out the defect (independently on the class it belongs to), as well as to the extraction of relevant features of the detected defect; the second part exploits a fuzzy inference system in order to analyze the type of defect and solves a classification problem that presently can be addressed only with the support of a human operator. Fuzzy inference systems are suitable to this application because they are able to mimic and reproduce the human reasoning.

关键词： Steel Surface treatment Feature extraction Shape Surface morphology Brightness

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TCP SYN flood detection based on payload analysis

TCP SYN flood detection based on payload analysis

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2010 8th IEEE Student Conference on Research and Development - engineering: Innovation and Beyond, SCOReD 2010

作者： Haris, S.H.C. Ahmad, R.B. Ghani, M.A.H.A. Waleed, Ghossoon M. School of Computer and Communication Engineering Universiti Malaysia Perlis P.O Box 77 d/a Pejabat Pos Besar 01000 Kangar Perlis Malaysia Department of Management Information System Applied Science University College of Administrative Science Villa 351 Road 141Block 340 Juffaie. Manama Bahrain

ISBN: (纸本)9781424486489

Transmission Control Protocol (TCP) Synchronized (SYN) Flood has become a problem to the network management to defend the network server from being attacked by the malicious attackers. The malicious attackers can easily exploit the TCP three-way handshake by making the server exhausted and unavailable with spoofed Internet Protocol (IP) address. The main problem in this paper is how to detect TCP SYN flood through network. This paper used anomaly detection to detect TCP SYN flood attack based on payload and unusable area in Hypertext Transfer Protocol (HTTP). The results show that the proposed detection method can detect TCP SYN Flood in the network through the payload. ©2010 IEEE.

关键词： Transmission control protocol

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Color Image Segmentation Based on Adaptive Level Set and Region Statistical Information

Color Image Segmentation Based on Adaptive Level Set and Reg...

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Chinese Conference on Pattern Recognition (CCPR)

作者： Xi-li Wang Yuan Feng Department of Computer Science Shaanxi Normal University Xi'an China Research Center of Electron Communication System and Electron Antagonize Technique Air Force Engineering University Xi'an China

This paper proposed an adaptive level set algorithm combining region statistical information for color image segmentation. In this model, we deduce image segmentation model with Maximum a posteriori according to Bayesian theory, and combine it into GAC model. Firstly, construct a speed stop function based on region statistical information which combines region statistical character and Bayesian model. And apply it to image segmentation on color images. Secondly, construct alterable coefficient based on a posteriori of segmented image of inside and outside the curve. It aims to change evolution direction adaptively based on the information of image. Thirdly, eliminate the re-initialization procedure by introducing interior restrict energy term of the Li method. At the same time, simplify the definition of the initial level set function. Experimental results show that this method has the advantages of evolving adaptively and stable numerical solution, and can extract the real edge of object from color image efficiently, so that is an effective image segmentation method.

关键词： Bayesian methods Image segmentation Level set Color Adaptation model Electronic mail Atmospheric modeling

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TCP SYN flood detection based on payload analysis

TCP SYN flood detection based on payload analysis

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Student Conference on Research and Development (SCOReD)

作者： S.H.C. Haris R.B. Ahmad M.A.H.A. Ghani Ghossoon M. Waleed School of Computer and Communication Engineering Universiti Malaysia Pedis Kangar Perlis Malaysia Head Department of Management Information System College of Administrative Science Applied Science University Manama Bahrain

关键词： IP networks Monitoring Floods Protocols Filtering Payloads Servers

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Packet analysis using packet filtering and traffic monitoring techniques

Packet analysis using packet filtering and traffic monitorin...

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International Conference on computer Applications and Industrial Electronics (ICCAIE)

作者： S. H. C. Haris R. B. Ahmad M. A. H. A. Ghani Ghossoon M. Waleed School of Computer and Communication Engineering Universiti Malaysia Pedis Kangar Perlis Malaysia Head Department of Management Information System College of Administrative Science Applied Science University Manama Bahrain

Malicious attackers intended to annihilate the availability of network server with threats such as Transmission Control Protocol (TCP) Synchronized (SYN) Flood. The attackers usually make the server exhausted and unavailable in order to complete the TCP three-way handshake mechanism. Detecting TCP SYN Flood in the Hypertext Transfer Protocol (HTTP) is the main problem in this paper. Anomaly detection is used to detect TCP SYN flood attack focusing in payload and unusable area. The unusual three-way handshake mechanism is also being analyzed. The results show that the proposed detection method using the combination of packet filtering and traffic monitoring can detect TCP SYN Flood in the network.

关键词： Floods IP networks Monitoring Protocols Filtering Servers Payloads

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Market-Based Bandwidth Allocation for Broadband Satellite communication Networks

Market-Based Bandwidth Allocation for Broadband Satellite Co...

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International Conference on Advances in Satellite and Space communications, SPACOMM

作者： Stavroula Vassaki Athanasios D. Panagopoulos Philip Constantinou Maria Angeles Vázquez-Castro Institute of Computer and Communication Systems (ICCS) National Technical University of Athens Athens-Zografou Greece Telecommunications and System Engineering Department Universitat Autonoma de Barcelona Bellatera (Barcelona) Spain

In this paper, we model the problem of bandwidth allocation for a broadband satellite communication system using a two level market-based game. Specifically, we consider that a number of satellite operators sell bandwidth to a certain number of users in order to maximize their profit. Simultaneously, the users choose from which satellite to buy the requested bandwidth trying to maximize their efficiency. Therefore, the initial problem of bandwidth allocation is modeled as a multiple buyer-multiple seller game where the satellites represent the sellers and the users represent the buyers of the game.

关键词： Channel allocation Broadband communication Satellite communication Bandwidth Artificial satellites Nash equilibrium Game theory Economic forecasting systems engineering and theory computer networks

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The S.H.E.L.L. project: A secure habitat for an enhanced long living: Design, implementation and guidelines for a new concept of people assistance

The S.H.E.L.L. project: A secure habitat for an enhanced lon...

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International Symposium on Applied Sciences on Biomedical and communication Technologies, ISABEL

作者： Fulvio Mastrogiovanni Giorgio Allasia Andrea Bagnasco Antonella Giuni Department of Computer Communication and System Sciences University of Genoa Genoa Italy Department of Biophysical and Electronics Engineering University of Genoa Genoa Italy FOS Srl Genoa Italy Genova Robot Srl Genoa Italy

The SHELL project aims at implementing state of art technologies in the domains of Wireless Sensor Networks, Ambient Intelligence, Context Awareness, Automated Learning, in order to design a new concept for assisting people affected by mental diseases or living alone. The goal to achieve is a modular device kit system, easy to deploy and to use, which will be able to learn to peculiar habits of the people under monitoring in order to improve the level of automatic alarms.

关键词： Monitoring Biomedical monitoring Sensors Adaptation model Personnel Medical diagnostic imaging Data models

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A high efficiency and multi-band/multi-mode power amplifier using a distributed second harmonic termination

A high efficiency and multi-band/multi-mode power amplifier ...

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European (Formerly European Gallium Arsenide and Other Semiconductors Application Symposium - EGASS) Microwave Integrated Circuit Conference (EuMIC)

作者： Jangheon Kim Farouk Mkadem Slim Boumaiza Telecommunication System Division Digital Media & Communication Business Samsung Electronics Company Limited Suwon Gyeonggi South Korea Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

This paper proposes a new broadband saturated power amplifier (SPA) with a distributed second harmonic termination supporting multi-band/multi-mode operation. The proposed network is composed of a fundamental matching circuit and multiple second harmonic termination circuits. Due to the multiple harmonic terminations, the proposed PA improves the frequency range where the PA can achieve a high efficiency. The proposed PA is fabricated using a 45 W Cree CGH40045 GaN HEMT. Drain efficiencies of greater than 60% (average 66%) are achieved between about 1.8 GHz and 2.3 GHz (500 MHz bandwidth). When driven with long term evolution (LTE) and two carrier wideband code division multiple access (WCDMA) signals at DCS1800, PCS1900, and WCDMA bands, the linearity specifications of the corresponding standards are satisfied using the digital predistortion linearization technique, and it attains an efficiency of greater than 30%.

关键词： Harmonic analysis Broadband communication Impedance Multiaccess communication Spread spectrum communication Bandwidth Gallium nitride

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Color image segmentation based on adaptive level set and region statistical information

Color image segmentation based on adaptive level set and reg...

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Chinese Conference on Pattern Recognition

作者： Wang, Xi-Li Feng, Yuan Department of Computer Science Shaanxi Normal University Xi'an 710062 China Research Center of Electron Communication System and Electron Antagonize Technique Air Force Engineering University Xi'an 710051 China

ISBN: (纸本)9781424472109

关键词： Image segmentation

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Method for measuring the twist angle of an optically compensation bend by using the heterodyne interferometry

Method for measuring the twist angle of an optically compens...

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IEEE Instrumentation and Measurement Technology Conference

作者： Shinn-Fwu Wang Wesley Lai Jyh-Shyan Chiu Rih-Huei Yeh Heng-Cheng Tseng Wei-Chou Chen Department of Electronic Engineering Ching Yun University of Technology Taoyuan Taiwan Institute of Computer Communication and System Engineering Ching Yun University of Technology Taoyuan Taiwan Research & Development Center Hannstar Display Corporation Tainan Taiwan

ISBN: (纸本)9781424428328

A new measuring method based on the common-path heterodyne interferometry is used to determine the twist angle, pre-tilt angle, and cell gap of an optically compensation bend (OCB) liquid crystal (LC) cell. In this paper, the twist angle of an OCB LC cell can be determined by measurement the phase difference instead of the reflectance difference. Because the measuring system is based on the common-path heterodyne interferometry, it can provide the most sensitive way to measure the twist angle of an OCB LC cell against the air turbulence and environmental vibrations. The method has some merits, e.g., a simple setup, in real-time test and reliability, etc.

关键词： Optical interferometry Goniometers Optical mixing Liquid crystal displays Electrooptic modulators Light sources Optical retarders Optical sensors Phase measurement Vibration measurement

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