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检索条件"主题词=Detection Algorithms"

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Locating Internet Congestion: Model and Algorithm

Locating Internet Congestion: Model and Algorithm

引用

International Conference on Networks Security, Wireless Communications and Trusted Computing, NSWCTC

作者： Ye-kui Qian Ming Chen Yu-ming Zhou Inst. of Command Autom. PLA Univ. of Sci. & Technol. Nanjing Institute of Command Automation People''s Liberation Army University of Science and Technology China

ISBN: (纸本)9781424442232

Congestion is still a great problem which Internet faces. Locating congestion links is very important to execute traffic engineering and mitigate network congestion. Firstly,congestion localization model was presented. After introducing AS performance matrix model, a kind of congestion detection algorithm based on threshold was put forward. Combining AS performance matrix with topology information, congested link localization algorithm was put forward. Simulation results show the algorithm has higher detection rate and lower false positive rate under different topology sizes and congestion levels.

关键词： Internet detection algorithms Traffic control Network topology Tomography Programmable logic arrays Communication system traffic control Wireless communication Computer networks IP networks

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Omnidirectional Surveillance System for Digital Home Security

Omnidirectional Surveillance System for Digital Home Securit...

引用

International Conference on Signal Acquisition and Processing, ICSAP

作者： Wai Kit Wong Joanne Tze Yen Liew Chu Kiong Loo Wei Kin Wong Faculty of Engineering and Technology Multimedia University Malaysia

This paper proposed an efficient omnidirectional surveillance system for digital home security. In this surveillance system, the omnidirectional scenes in a room, kitchen, car porch, dining hall, corridor, garage or backyard within a digital home are first captured using a web camera attached to a hyperbolic optical mirror. The captured scenes are then fed into a laptop computer for image processing and alarm purposes. Log-polar mapping is proposed to map the captured omnidirectional image into panoramic image, hence providing the observer or image processing tools a complete wide angle of view. A trespasser detection algorithm is also designed for trespasser detection purpose. The observed significances of this new proposed surveillance system include: it can cover a wide angle of view (360deg omnidirectional), small in size, low cost, lightweight, output images are with higher data compression, and accurate trespasser detection.

关键词： Surveillance Security Layout Image processing Digital cameras Mirrors Portable computers detection algorithms Algorithm design and analysis Costs

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The Skew Correcting Method for Two Dimension Bar Code Based on Least Square Methods

The Skew Correcting Method for Two Dimension Bar Code Based ...

引用

International Conference on Digital Image Processing, ICDIP

作者： Bo Chen Zhi Liu Xiaohui Xu Software College Zhejiang University of Technology Hangzhou China

In general, the scanned image of two dimension barcode is usually skew. In order to recognize two dimension barcode correctly, the skew angle of two dimension barcode must be detected and corrected firstly. In this paper, the edge profile of two dimension barcode is extracted and the feature points are saved at first. Then the Least Square Methods is used to synthesize these features points to a straight line in order to get the skew angle and correct them. Experimental results show that this algorithm is fast and strong anti-noise. The identification and recognition rate for the two-dimension barcode is increased effectively.

关键词： Least squares methods Fourier transforms detection algorithms Decoding Graphics Digital images Educational institutions Image edge detection Feature extraction Linear regression

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A Dynamic Tracing Algorithm Based High Speed Camera

A Dynamic Tracing Algorithm Based High Speed Camera

引用

Computer Science and Information Engineering, CSIE, WRI World Congress on FLAGGED

作者： Baobao Wang Lingzhi Chen Yang Xiao Department of Computer Science and Technology Xidian University Xi'an Shaanxi China

A dynamic tracing algorithms for the detection of industrial sewing machines on images sequences from a high-speed camera is presented. First, feature extraction is completed with the Harris Corner detection algorithms based on the change of intensity; Then the prediction of the move tendency of the corners with Extended Kalman Filter is accomplished; By using of the Neighborhood Matching algorithms the paths of the component tracked is obtainable finally . The Harris Corner detection algorithms has the properties of translation, rotation and scaling invariance and high precision, the Neighborhood Matching algorithms has the advantage of low computational complexity , the combination with Extended Kalman Filter increase the efficiency and the accuracy of the system. Experimental results show that it have a good performances in the problem proposed.

关键词： Heuristic algorithms Cameras Image sequences Feature extraction detection algorithms Computer science Change detection algorithms Trajectory Particle filters Eigenvalues and eigenfunctions

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Attacks on Translation Based Steganography

Attacks on Translation Based Steganography

引用

IEEE Youth Conference on Information, Computing and Telecommunication, YC-ICT

作者： Peng Meng Liusheng Hang Wei Yang Zhili Chen NHPCC Department of CS. & Technology USTC Hefei China NHPCC Department of CS. & Technology USTC Suzhou China University of Science and Technology of China Hefei Anhui CN

Translation-based steganography (TBS) is a kind of famous text steganography. In this paper, we examine the robustness of TBS and give an effective detection algorithm for TBS. Our algorithm can not only distinguish between natural language text and stego-text which was generated by TBS, but also can distinguish between machine translated text and stego-text. The detection accuracy increases as the text size increases. When the text size is larger than 60 sentences, the detection accuracy is greater than 92%.

关键词： Steganography Cryptography detection algorithms Support vector machines Support vector machine classification IEEE members Robustness Natural languages Image reconstruction Protocols

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A Trust-Based Detecting Mechanism against Profile Injection Attacks in Recommender Systems

A Trust-Based Detecting Mechanism against Profile Injection ...

引用

2009 Third IEEE International Conference on Secure Integration and Reliability Improvement SSIRI 2009(第三届IEEE安全软件集成及可信性改进国际会议)

作者： Chuliang Weng Qiang Zhang Yuan Luo Minglu Li Computer Science and Engineering Department Shanghai Jiao Tong University Shanghai China 200240 Computer Science and Engineering Department Shanghai Jiao Tong University Shanghai China200240

ISBN: (纸本)9780769537580

Recommender systems could be applied in grid environment to help grid users select more suitable services by making high quality personalized recommendations. Also, recommendation could be employed in the virtual machines managing platform to measure the performance and creditability of each virtual machine. However, such systems have been shown to be vulnerable to profile injection attacks (shilling attacks), attacks that involve the insertion of malicious profiles into the ratings database for the purpose of altering the system's recommendation behavior. In this paper we introduce and evaluate a new trust-based detecting algorithM for protecting recommender systems against profile injection attacks. Moreover, we discuss the combination of our trust-based metrics with previous metrics such as RDMA in profile-level and item-level respectively. In the end, we show these metrics can lead to improved detecting accuracy experimentally.

关键词： Recommender systems virtual machines RDMA Injections Vulnerable detection algorithms

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Recognition of T Waves in ECG signals

Recognition of T Waves in ECG signals

引用

Annual Northeast Bioengineering Conference

作者： Mohamed Elgendi Mirjam Jonkman Friso De Boer School of Engineering and Information Technology Charles Darwin University Australia

The method described in this paper deals with the problems of T-wave detection in ECG signals. Determining the position of a T-wave can be complicated, due to the ambiguous and changing form of the complex and the presence of noise. We developed a method to detect T-waves in noisy signals. The performance of the proposed method was tested on 33 records of the MIT/BIH Arrhythmia Database resulting in 0.48% incorrectly detected T waves.

关键词： Electrocardiography Spatial databases Testing Feature extraction Heart beat Morphology detection algorithms Sampling methods Heart rate variability Information technology

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Resource scheduling and congestion control for WMN

Resource scheduling and congestion control for WMN

引用

IEEE International Conference on Communications Technology and Applications, ICCTA

作者： Xu Li Xiaosong Yang Lei Cui Zhangdui Zhong State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China

ISBN: (纸本)9781424448166

The guarantee technology of MAC quality of service (QoS) for wireless mesh network is proposed in this paper. While the MAC protocol of IEEE 802.16 mesh mode has provided a good framework for QoS guarantee, there is not a detailed standard for the resource scheduling algorithm in the MAC protocol. So further development is left to designers. According to the characteristics of WMN, this paper presents a resource scheduling algorithm. Also, the paper designs a new congestion detection module in MAC layer. With the help of the new congestion detection module, the congestion handling capacity of the network is improved and QoS guarantee mechanism is enhanced. To evaluate the performance of the algorithm, a simulation platform is set and implemented. The simulation results show that the new resource scheduling algorithm and congestion detection algorithm not only ensure the service priority of real-time operation but also improve the resource utilization and the network throughput.

关键词： Quality of service Scheduling algorithm Media Access Protocol Wireless mesh networks detection algorithms Resource management Throughput

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Field test results of power-line signaling based anti-islanding scheme

Field test results of power-line signaling based anti-island...

引用

IEEE Canada Electric Power Conference, EPEC

作者： Xun Long Chris Lerohl Wilsun Xu Yunwei Li Ken Burr Corey Senkow Department of Electrical and Computer Engineering University of Alberta Edmonton AB Canada Manitoba Hydro MBH Winnipeg MAN Canada

ISBN: (纸本)9781424445080;9781424445097

The capability of anti-islanding protection is a very important requirement for distributed generators (DG). A power line signaling based scheme for anti-islanding protection has been proposed in a companion paper. In the scheme, a signal generated by power electronics is injected from a central upstream location to the DG sites. The lack of a signal at the DG site indicates that the DG is islanded. This paper is a summarization of extensive field test for the proposal. Two proposed detection algorithms have been verified, the impact of firing angles on signal strength have been determined and the effect of power system frequency drift have been analyzed. The test results proved that the proposed scheme is promising for the anti-islanding protection of distributed generator.

关键词： Testing Distributed power generation Power system protection Power generation Signal generators Power electronics Proposals detection algorithms Power system analysis computing Frequency

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New Algorithm of Liquid Level of Infusion Bottle Based on Image Processing

New Algorithm of Liquid Level of Infusion Bottle Based on Im...

引用

International Conference on Information Engineering and Computer Science (ICIECS)

作者： Huasheng Zhu Department of Computer Science and Technology Nanchang Institute of Technology Nanchang China

ISBN: (纸本)9781424449934

The key of intelligent infusion system is to detect liquid level of infusion bottle fast and accurately. We proposed an automatic detection algorithm of liquid level of infusion bottle based on image processing, by designing edge detection, binarization, filtering, image projection and motion detection to realize automatic liquid level detection. The algorithm has the advantages of stable noise-resistance, rapidity and simplicity, etc. Experimental results of the algorithm show that the algorithm is effective and feasible.

关键词： Image processing Image edge detection Intelligent systems Flowcharts Motion detection detection algorithms Algorithm design and analysis Hardware Intelligent sensors Fluid flow

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