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An improved real-valued negative selection algorithm for anomaly detection

International Journal of Advancements in Computing Technology 2012年第16期4卷 453-459页

作者： Zeng, Jinquan Tang, Weiwen Liu, Caiming Hu, Jianbin Peng, Lingxi School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu China Sichuan Communication Research Planning and Designing Co. ltd Chengdu China Laboratory of Intelligent Information Processing and Application Leshan Normal University Leshan China School of Electronics and Information Nantong University Nantong China Department of Computer and Education Software Guangzhou University Guangzhou China

Conventional classification algorithms need samples for all classes (e.g. normal and abnormal) during the training phase. However, in many anomaly detection application, we can only get a class samples (commonly, normal samples) to train detectors. This paper presents an improved negative selection algorithm (NSA) and its applications to anomaly detection. This approach can only use normal samples to train detectors;at the same time, in order to overcome the drawbacks of the current representation of the self-space in NSAs, a new scheme of the representation of the self-space is introduced with variable-sized self-radius. In our experiments, this approach is tested using the wellknown real world datasets;preliminary results show that the new approach improves the overall performance of detectors and without increase in complexity.

关键词： Artificial intelligence

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Establishing the error threshold for alignment tasks in natural direct-touch interaction

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ICIC Express Letters 2012年第12期6卷 3049-3054页

作者： Chu, Chenhui Wang, Feng Deng, Hui Ren, Xiangshi Computer Technology Application Key Lab Kunming University of Science and Technology No. 68 Wenchang Road 12.1 Street Kunming 650093 China Department of Information Systems Engineering Kochi University of Technology Tosayamada Kami-city Kochi 782-8502 Japan

Direct touch technology is very attractive because of its glossy appearance, smooth touch and intuitive interface. However, previous studies show that the bare finger is not suitable for tasks requiring high accuracy because of its physical limitations. Indeed, the users' finger can control finger sliding with a high degree of accuracy, namely of 1 pixel, but it may take long time to achieve after multiple attempts. This study aims to understand the requirements of natural and quick interaction on direct touch devices. We evaluated the error threshold of alignment tasks so as to design natural user interface with relative high degree of accuracy. Three common tasks, i.e., object docking, scaling and rotating were implemented. Participants were asked to carry out the three tasks in restricted and non-restricted conditions. The experimental results show that the ideal error threshold of the docking and scaling task is approximately 2 pixels (0.05 cm) and the error threshold of rotation is approximately 2 degrees. Subjective feedback showed that users felt smooth interaction, continual flow and low load with such an error threshold. © 2012 ISSN 1881-803X.

关键词： Errors

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Calculating the pre-image using the kernel methods

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Advances in Information sciences and Service sciences 2012年第22期4卷 612-618页

作者： Tan, Zhiying Feng, Yong Xu, Kejia Jia, Ke Song, Xiaobo School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu China Chengdu Inst. of Computer Application Chinese Academy of Sciences Chengdu China Changzhou Inst. of Advanced Manufacturing Chinese Academy of Sciences Changzhou China Chongqing Inst. of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China School of electrical SouthWest JiaoTong University Chengdu China

The nonlinear features can be extracted by the kernel methods. The features play the important roles in pattern recognition and image processing. The researching on kernel methods has the great theoretical and practical value. In the paper, we propose a method to calculate the pre-images using the kernel methods. And we specifically design an algorithm to obtain the pre-image based on the kernel PCA with Gaussian kernel. In the algorithm, the constructed optimal problem is solved by the iterative method. The method is available to all the learning problems with a large sample set. We use the method to detect the defects on the tickets' surface. The experiments results indicate that the method not only reduce the mistake rate but also cut down the detection time.

关键词： Iterative methods

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Interference analysis of TD-SCDMA system and CDMA2000 system

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Journal of Networks 2012年第1期7卷 101-109页

作者： Hao, Chen Tong, Yang Jian-Fu, Teng Hong, He School of Electronic and Information Engineering Tianjin University Tianjin 300072 China Computer Science and Information Engineering College Tianjin University of Science and Technology Tianjin 300222 China Tianjin Mobile Communications Co. Ltd Tianjin 300052 China School of Electronic and Information Engineering Tianjin University Tianjin 300072 China Tianjin Key Laboratory for Control Theory and Application in Complicated Systems Tianjin University of Technology Tianjin 300384 China

In this paper, the feasibility of co-channel coexistence of Time Division- Synchronous Code Division Multiple Access (TD-SCDMA) and Code Division Multiple Access 2000 (CDMA2000) systems operating in a macro cell environment is investigated. The deterministic analysis and simulation method are used to evaluate the performance compromising of both systems. Based on a more efficient calculation scheme, a novel deterministic equation is proposed and used to provide a better interpretation of the relationship between aggressor and victim in the interference system. The evaluation and simulation results show consistency with the corresponding experiment results. Furthermore, the interference characteristics of Omni-antenna and smart antenna in TD-SCDMA and CDMA2000 are compared, providing an important guideline to reduce the interference of two systems. © 2012 Academy Publisher.

关键词： Code division multiple access

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Smart home network mechanism via cloud computing

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Journal of Computational Information Systems 2012年第23期8卷 10035-10042页

作者： Liu, Li Fu, Xiaodong Jiang, Hong Lv, Yang Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming 650500 China Computer Technology Application Key Lab of Yunnan Province Kunming 650500 China National Engineering Research Center of Digital Life State-Province Joint Laboratory of Digital Home Interactive Applications Sun Yat-sen University Guangzhou 510006 China

Traditional smart home system based on TCP/IP network applies TC35i cell phone module in smart home controller, and realizes function of short message service by GSM network. This realization model is complex, high-cost, hard to test, and it cannot ensure the short messages could be received and sent successfully. Using the advantages of Cloud computing system, we present a kind of smart home network mechanism solution based on Cloud computing in this paper. Two important constituents in the proposed solution, i.e., SGIP exterior short message gateway and residential quarter information system are described in detail. Moreover, the error ratio of system decreases markedly by improving the short message interface. The proposed smart home network mechanism solution via Cloud computing can be a referential model of the digital life application research based on Cloud computing platform. ©2012 by Binary Information Press.

关键词： Cloud computing

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Experimental analysis on the buckling failure of elliptical-notched circular tubes subjected to cyclic bending

Chung Cheng Ling Hsueh Pao/Journal of Chung Cheng Institute ...

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Chung Cheng Ling Hsueh Pao/Journal of Chung Cheng Institute of Technology 2012年第2期41卷 183-190页

作者： Lee, Kuo-Long Hung, Chao-Yu Pan, Wen-Fung Department of Computer Application Engineering Far East University Taiwan Department of Mechanical Engineering Chinese Military Academy Taiwan Department of Engineering Science National Cheng Kung University Taiwan

This paper presents an experimental investigation on the buckling failure of 304 stainless steel tubes with five different elliptical-notched depths subjected to cyclic bending. It can be observed from the experiment data that the steel tube with any notch depth exhibits a cyclic hardening phenomenon from the moment and curvature relationship, and a steady-state loop is found after a few loading cycles. From the relationship between the ovalization and curvature, an unsymmetric and ratcheting manner of the curve is found. Lower notch depth leads to further unsymmetry of the curve. It can also be observed from curvature-number of cycles to produce buckling curve that five almost parallel straight lines can be found for five different notch depths in a log-log scale. Finally, by using the theoretical equation introduced by Kyriakides and Shaw in 1987, a material parameter equation for the notch depth was proposed in this study to simulate the aforementioned relationship. By comparing the theoretical analysis with the experimental data, it is shown that the theoretical formulation can properly represent the experimental results.

关键词： Buckling

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A study of battery modeling technologies for vehicle system simulations

A study of battery modeling technologies for vehicle system ...

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IEEE Workshop on computers in Power Electronics

作者： Takayuki Sekisue Koichi Shigematsu Takashi Abe Thanh-Son Dao Technical Division Electrical Business Unit. ANSYS Japan K.K. Tokyo Japan Model Based Development Promotion Division Cybernet Systems Company Limited Nagoya Aichi Japan Division of Electrical Engineering and Computer Science Graduate School of Engineering Nagoya University Nagasaki Japan Application Engineering Division Maplesoft Waterloo Canada

The goal of this research is a proposal of a standard model for vehicle system simulations. Recently, the CO 2 reduction and efficiency improvement of the energy consumption are important subjects in development of the vehicle systems. The new technologies related to vehicle development have continued to increase in complexity. For these reasons, the energy management simulation by the coordinated design of an electric system and vehicle system is required. The electrical behavior of the batteries becomes important to improve the energy management in the vehicle systems. The battery modeling technologies and the application example for vehicle system simulation are reported.

关键词： Batteries Vehicles Mathematical model Integrated circuit modeling Equations System-on-a-chip Discharges (electric)

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The research and application of web-application based workflow engine

The research and application of web-application based workfl...

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IEEE International Conference on Communication Software and Networks

作者： Wang, Yujie Zhang, Yu Department of Computer Application South China University of Technology Computer Science and Engineering Academy Guangzhou China

ISBN: (纸本)9781612844855

Workflow is the technology of implementing automated process. It has a wide use in many fields. The study of workflow engine is a key problem of implement of workflow system. The traditional workflow engine has many limits in practice. In order to reduce cost, shorten developing cycle and raise product competitiveness, open source softer ware become more and more popular in enterprise application. jBPM based on J2EE is most prone to be commercialized in the open source workflow engine domain. But before designing jBPM workflow, it should install eclipse plug-in first. It is a shortcoming especially in the system which has a high demand of time. This paper is in tented to use JavaScript to design a compiler based on MVC pattern, to solve this problem and expand the jBPM engine interfaces to better meet the application in the real-time system with better flexibility, transplant ability. © 2011 IEEE.

关键词： Real time systems

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Unknown malicious executables detection based on immune principles

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Research Journal of Applied sciences, engineering and Technology 2012年第1期4卷 82-85页

作者： Zeng, Jinquan Liu, Caiming Hu, Jianbin Zhang, Yu School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 China Sichuan Communication Research Planning and Designing Co. ltd Chengdu 610041 China Laboratory of Intelligent Information Processing and Application Leshan Normal University Leshan 614004 China School of Electronics and Information Nantong University Nantong 226019 China College of Information Science and Technology Hainan Normal University 571158 Haikou China

Detecting unknown malicious executables is a challenging task. Traditional anti-virus systems use signatures to detect malicious executables. However, the method cannot detect unseen instances or variants. Inspired by biological immune systems, an immune-based approach for detection of unknown malicious executables is proposed in this paper, which is referred to MEDMI. The approach can use the benign executables to be the training set for building the profile of the system and then generates detectors to detect malicious executables. The experiments comparing with different detection methods show that the approach provides an effective novel solution to detect malicious executables. © Maxwell Scientific Organization, 2012.

关键词： Viruses

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Numerical simulations of nonequilibrium flows over rounded models at reentry speeds 18

Numerical simulations of nonequilibrium flows over rounded m...

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18th AIAA/3AF International Space Planes and Hypersonic Systems and Technologies Conference 2012

作者： Wen, Chih-Yung Massimi, Heriberto Saldívar Chen, Yen-Sen Liang, Shen-Min Bondar, Yevgeniy A. Ivanov, Mikhail S. Department of Mechanical Engineering The Hong Kong Polytechnic University Kowloon Hong Kong Department of Aeronautics and Astronautics National Cheng Kung University No.1 University Road Tainan 70101 Taiwan National Space Organization 8F 9 Prosperity 1st Rd. Hsinchu Science Park Hsinchu 30078 Taiwan Department of Computer Application Engineering Far East University No.49 Chung Hua Rd. 744 Taiwan Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Computational Aerodynamics Laboratory Institutskaya str. 4/1 Novosibirsk 630090 Russia

ISBN: (数字)9781600869310

ISBN: (纸本)9781600869310

The present work focuses on the problem of aerothermodynamics of space vehicles with rounded edges on the hypersonic segment of the flight trajectory. Firstly, the in-house Navier-Stokes solver, UNIC-UNS code, with the slip boundary condition is used to simulate the flows around a spherical-nosed cylinder at different Knudsen numbers and Mach numbers, and compared with DSMC computations for validation. The Navier-Stokes simulations are in good agreement with that of DSMC. The hypersonic flows over the European eXPErimental Re-entry Test-bed (EXPERT) model are then simulated for a wide range of flow regimes, which correspond to the expected descent trajectory with allowance for rarefaction and thermochemical nonequilibrium. Three dimensional CFD analyses are presented for the complete geometry of the capsules considering the air dissociation and its effects on the flow structure and on the force and thermal loads for the hypersonic segment of the flight as a precursor to the future studies and to provide the scientific community with quality data that can be used to improve tools for the design of hypersonic vehicles. © 2012 by Wen, Saldivar Massimi, Chen, Liang, Bondar and Ivanov.

关键词： Hypersonic vehicles

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