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检索条件"任意字段=2012 2nd International Conference on Computer Application and System Modeling, ICCASM 2012"

共 812 条记录，以下是311-320 订阅

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Process analysis of buffer overflow based on dynamic binary platform

Process analysis of buffer overflow based on dynamic binary ...

引用

2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Fei, Kang Pengcheng, Dong Hui, Shu Jing, Sun China National Digital Switching System Engineering and Technological Research Center Zhengzhou 450002 China

ISBN: (纸本)9789491216008

Based on dynamic binary platform, an analysis method for buffer overflow is described in detail and a prototype system is implemented. Overflow detection based on exception capture, control flow analysis, and memory status checks is implemented according to the principle of buffer overflow exploits. By monitoring memory read and write instructions, control transfer instructions, system obtains call sequences and data transfer flow. Through analysis of memory data and function calls, we locate code lead to overflow. Experimental results show that the system can detect overflow, and accurately position code segment which results in buffer overflow. The prototype system is of important value in efficient analysis of 0day and rapid patching software. © The Authors.

关键词： Data transfer

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Design and implementing of meteorological data management system

Design and implementing of meteorological data management sy...

引用

2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Xiong, Jia Zhang, Weimin Yu, Yi Qin, Yaolei Department of Computer Science University of National Defense Technology Changsha China NO.94865 Troops of Chinese People's Liberation Army Hangzhou China

ISBN: (纸本)9789491216008

Based on characteristic of meteorological data, meteorological data management system(MDMS) is designed and implemented. It is divided to client-side and server-side parts. The server-side which is responsible for meteorological data archived retrieved uses two-tier design, including logical server and physical server. The client-side provides based on portal framework Gridsphere provide web interface for users and researchers to use this system in grid environment. This system can manage heterogeneous meteorological data and improve the efficiency of meteorological data archived and retrieved. The system has been successfully applied to Chinese Ensemble Prediction Grid Project (CEPGP),and CEPGP works efficiently to demonstrate the feasibility of the system. © the authors.

关键词： Information management

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A scheduling algorithm for fork-join DAG in bus-based and heterogeneous environment

A scheduling algorithm for fork-join DAG in bus-based and he...

引用

2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Wang, Lisheng Chen, Liguo Wang, Kete Department of Computer Science College of Electronic and Information Engineering Tongji University Shanghai China

ISBN: (纸本)9789491216008

The Fork-Join task graph is one of the basic modeling structures for parallel processing. However, many previous scheduling algorithms ignore to economize processors and minimize the total completion time. What's more, many algorithms don't consider the competition caused by bus-based clusters and the heterogeneous of processors in real applications. This paper presents a new algorithm for Fork- Join task graph, considering economy of processors and minimization of the total completion time, the non-parallel communication, and heterogeneous environment as well. We propose a task scheduling algorithm based on task duplication which randomly generated a number of Fork-Join task graphs by producing the task execution time and communication time. Simulation results show that the proposed algorithm has less total completion time and less number of processors than other compared algorithms for more practical applications. © the authors.

关键词： Scheduling algorithms

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The research and implementation of anti-theft monitoring alarm system based on MTK

The research and implementation of anti-theft monitoring ala...

引用

2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Luo, Mingzhang Wang, Junmin Zhang, Mingyun Wang, Hongli Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of Education Yangtze University Jingzhou China Yangtze University Jingzhou China SJS Ltd. Jingzhou China

ISBN: (纸本)9789491216008

As a cost-effective mobile development platform, MTK support the functions of recording video and sending multimedia message. In this paper, an anti-theft monitoring alarm system based on MTK is proposed and implemented. The design based on a high performance MTK chip of MT6226. The sensors and the alarm device attached to MT6226 through the interface of GPIO. Once one of the sensors detect abnormal signal, MT6226 call the thread of recording video, driving the alarm device. Then the MTK send a multimedia message which compressed by the video to the master. The experiment results show that the anti-theft monitoring alarm system based on MTK platform have achieved good performance on cost-effective and flexibility, which make up for the inadequacy of existing monitoring systems. © The Authors.

关键词： Alarm systems

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Locality preserving fisher discriminant analysis with clustering

Locality preserving fisher discriminant analysis with cluste...

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2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Zou, Lishan Wang, Yuechao Chen, Zhenzhou Wu, Xiaorong College of Information and Automobile Engineering Guangzhou City Polytechnic Guangzhou 510405 China Computer School South China Normal University Guangzhou 510631 China School of CISCO Informatics China Guangdong University of Foreign Studies Guangzhou 510420 China

ISBN: (纸本)9789491216008

Fisher discriminant analysis (FDA) is an important feature extraction method for many classifiers. However, it tends to give undesired results if samples in some classes form several separate clusters, i.e., multimodal. This paper proposed a new feature extraction method called locality preserving Fisher discriminant analysis with clustering (LPFDA) for multimodal data. First new classes are formed by clustering data according to labels, then the between-subclass scatter matrix and within-subclass scatter matrix are computed by new classes, finally the vectors are choose which will maximize the Fisher criterion function as the discriminant vector . When our method is applied to the recognition problems of digits and images, and the experimental results show the better performance than the original one. © the authors.

关键词： Feature extraction

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K-coverage algorithm based on target association in wireless sensor network

K-coverage algorithm based on target association in wireless...

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2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Sun, Zeyu Li, Chuanfeng Department of Computer and Information Engineering Luoyang Institute of Science and Technology Luoyang 471023 China

ISBN: (纸本)9789491216008

During the process of carrying out K coverage algorithm of WSN to the target area, there are some shortcomings, such as many redundancy nodes will emerge, the process consumes a lot of node energy in the network at the same time, and the process is easily restricted by the outside environmental elements. Countering the shortcomings, this article puts forward an event probability K coverage algorithm. By means of giving different probability value to different monitor degree of the target area nodes, and by way of information exchange and relevance nature between the nodes, the algorithm fixes the smallest nodes collection and the biggest target collection, thus effectively fulfills K coverage to target area nodes, optimizes network resources, reduces energy consumption of the nodes, prolongs the life time of the network. Simulation experiments show that, this algorithm can fulfill K coverage to target area at small cost and increases the whole network life time, has good practical result and stability. © the authors.

关键词： Energy utilization

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Software and hardware implementation of IIR based on matlab&acceldsp

Software and hardware implementation of IIR based on matlab&...

引用

2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Chen, Hongyan Wang, Lisheng Department of Computer Science and Technology Tongji University Shanghai China

ISBN: (纸本)9789491216008

Since the IIR design is very difficult and timeconsuming by using the hardware description language directly, this paper presents a simpler and more efficient method for IIR digital filter design. This design is based on Batterworth analog filter, using the impulse response invariant method. The design steps are: design nonquantitative IIR filter using Matlab;convert the designed IIR filter of M language into hardware description language using AccelDSP;then verify and synthesize the IIR design using ISE 10.1 of Xilinx. The design is verified by timing simulation and can be implemented on FPGA directly. The key of this design is to analyze the IIR digital filter algorithm, then describe it through the synthesizable m language and finally convert the m program to RTL design by using AccelDSP. The aim of this paper is to simplify the IIR digital filter design. © The Authors.

关键词： IIR filters

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Artifact removal from EEG with a preprocessing for preserving desired bands

Artifact removal from EEG with a preprocessing for preservin...

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2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Chiang, Ching-Tai Ouyang, Chen-Sen Wu, Rong-Ching Lin, Lung-Chang Yang, Rei-Cheng Department of Computer and Communication National Pingtung Institute of Commerce Pingtung Taiwan Department of Information Engineering I -Shou University Kaohsiung Taiwan Department of Electrical Engineering I -Shou University Kaohsiung Taiwan Department of Pediatrics Kaohsiung Medical University Hospital Kaohsiung Taiwan

ISBN: (纸本)9789491216008

Artifacts such as eye movements, muscle, electrocardiogram (EKG) and line noise may cause severe contamination in Electroencephalogram (EEG). The independent component analysis (ICA) is the general method to remove the artifacts within electroencephalographic traces. Desired bands in specific EEG analysis, however, may be seriously eliminated in the deflation procedure. A preprocessing with extraction of desired bands in the ICA is presented to prevent the desired bands from cancellation in the process of artifact rejection. Thus, the desired bands in EEG can be completely preserved while removing the artifacts. Some real EEG recordings are provided to demonstrate the effectiveness of the proposed method. © The Authors.

关键词： Electroencephalography

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Digital 3D modeling of vestment based on project-camera system

Digital 3D modeling of vestment based on project-camera syst...

引用

2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Tao, Jun School of Mathematics and Computer Science Jianghan University Wuhan Hubei 430056 China

ISBN: (纸本)9789491216008

With the coming of information age and the development of computer science, digitalization of whole vestment is becoming more and more important. The surface of whole vestment is sequent and glossy so that it is lack of the texture characteristic which is the key of digital 3D modeling. According to this reason, the structure illumination is steered into a method of this paper. The paper proposes the method by which 3D model of whole vestment is created from 2D image sequences directly but not by the common techniques using general CAD model. In the paper the structure illumination is generated by the slide projector and the modeling of whole vestment is based on the strict theory of the digital photogrammetry, computer vision and image processing pattern recognition. Because whole vestment is lack of the applicable texture for matching as above said, the characteristic texture generated by the structure illumination is added onto the surface of whole vestment. After the characteristic texture is extracted from images and is matched well, 3D coordinates of the characteristic texture can be calculated out by the space forward intersection. Then the whole vestment model is acquired by connecting all neighbour space points in the TIN and rendering the real texture of whole vestment automatically. The 3D modeling method is untouched so that it is nondestructive which is just suitable for the messaline and the clothing. The method of whole vestment 3D modeling proposed in the paper is flexible, effective and practical, which is confirmed by the results of the reconstructing experiments. © the authors.

关键词： computer aided design

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The application of HHT method used in the anchor bolt testing signal

The application of HHT method used in the anchor bolt testin...

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2012 2nd international conference on computer application and system modeling, iccasm 2012

作者： Wang, Linsong Wang, Junmin Luo, Mingzhang Chen, Chao Wang, Qiuge Wang, Kun Institute of Geophysics and Geomatics China University of Geosciences Wuhan 430074 China Yangtze University Jingzhou China Faculty of Engineering China University of Geosciences Wuhan China

ISBN: (纸本)9789491216008

When varying degrees defects existing in the anchorage system, energy decreasing and frequency mutation can be caused during the acoustic waves propagation. We can get the instantaneous frequency of the signal by processing the analysis of anchor bolt testing signal using the method of HHT (Hilbert-Huang Transform), then we derive the accurate expression of its frequency varying over time. In addition, we can obtained the Time-Frequency distribution of the energy in three-dimensional space (which also known as the distribution of Hilbert) on the basis of the expression. The analysis results of the simulated signal and actual signals (measurement signals) indicated that the HHT method can collect the effective information Comparatively accurate thus validate that this method can apply to anchor bolt testing signals with variable energy and frequency preferably. © The Authors.

关键词： Bolts

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