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检索条件"丛书名=电子工程与计算机科学"

共 178 条记录，以下是21-30 订阅

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The judgement on lack of nitrogen in rice based on SVM algorithm

The judgement on lack of nitrogen in rice based on SVM algor...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Lu, Bing Sun, Jun Liu, Hui Song, Caihui Wu, Xiaohong Information Center Jiangsu University Zhenjiang Jiangsu China School of Electrical and Information Engineering Jiangsu University Zhenjiang Jiangsu China

ISBN: (纸本)9780769546476

The intelligent judgment of nitrogen content in rice has great significance to its healthy growth. Here use soil less culture technique to cultivate rice with different nitrogen levels. In various stages, field spec is used to acquire rice canopy spectra, meanwhile using AA3 continuous flow analyzer to measure nitrogen level in specimen of rice leaves, which constitutes a sample database about rice with different nitrogen content. Samples in the sample library is tested and modeled by use of Least Squares Support Vector Machines (LS-SVM) method. At last, predict the classification of the test samples. This test shows that, the eventual recognition accuracy whether are deficient in nitrogen can reach 95. It suggests that, support vector machines (SVM) can be used for the judgment whether the rice is deficient in nitrogen or not. © 2012 IEEE.

关键词： Support vector machines

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Research on malicious code detection based on least-squares estimation

Research on malicious code detection based on least-squares ...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Wu, Yunlong Chen, Chen Wang, Huiquan Xu, Xinhai Zhou, Jie National Laboratory for Parallel and Distributed Processing School of Computer National University of Defense Technology Changsha Hunan 410073 China School of Computer National University of Defense Technology Changsha Hunan 410073 China

ISBN: (纸本)9780769546476

Malicious code detection based on behaviors is the development direction of anti-virus techniques. However, the current detection methods based on this theory expose several problems such as the unclearness of behavior sequence analysis and the high false negatives. For this situation, this paper proposes a malicious code detection method based on least-squares estimation. In this method, it correlates program behaviors with time and subject-object, and then constitutes an accurate and complete behavior sequence. It can provide a preprocessing method for the subsequent detection. In order to improve the accuracy and intelligence of malicious code detection, we introduce the concept of expert subjective degree. By modeling malicious samples based on least-squares estimation we can train the Expert Subjective Degree Vector (ESDV) and simulate experts to judge the threat values of malicious codes. Experiments show that this method is more accurate than the current ways to detect the malicious codes which execute themselves in sub-period and sub-process ways, so it can be used as an effective complement of the current anti-virus software. © 2012 IEEE.

关键词： Codes (symbols)

来源：评论

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Video monitoring communication system design based on wireless mesh networks

Video monitoring communication system design based on wirele...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Yang, Liuqing Computer Dept. Fuzhou Vocational and Technical Institute Fuzhou Fujian 350002 China

ISBN: (纸本)9780769546476

In this paper, wireless network was designed for the large data flow requirements in video monitoring, Including frequency planning, building a campus wireless signal coverage standard model, the theoretical calculations of covering effect, wireless security and authentication and certification site selecting, Proposed the overall solution of IP wireless video monitoring system, and applied to the actual campus network monitoring system, to obtain the corresponding research results. The design is to provide wireless access coverage for state of the complex geographical environment, the high cost of cable distribution networks, information technology needed for development areas, to resolve such applications such as video transmission design solutions. © 2012 IEEE.

关键词： Monitoring

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Iterative method of maximum likelihood for state estimation with inequality constraints

Iterative method of maximum likelihood for state estimation ...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Wu, Xinhui Huang, Gaoming Gao, Jun College of Electronic Engineering Naval University of Engineering Wuhan 430033 China

ISBN: (纸本)9780769546476

An iterative method of incorporating state inequality constraints in kalman filter is proposed. The constrained filter is derived as the maximum posteriori solution to the constraints, a penalty function is used to transform the inequality constraints, and the solution to the set of estimates is obtained by using Gaussian Newton method. At each time step the unconstrained kalman filter solution is projected onto the state Constraint surface. A target tracking example is presented demonstrating the efficiency of the algorithm. © 2012 IEEE.

关键词： Kalman filters

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The blind equalization method based on particle filter theory

The blind equalization method based on particle filter theor...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Wang, Lei Yang, Jie Ao, Wei Bai, Xi Chen, Lei Chongqing Communication College Chongqing China

ISBN: (纸本)9780769546476

In this pape, particle filter theory and its Application in blind equalization are presented. The basic idea of particle filter is the recursive computation of relevant probability distributions using discrete random measures composed of the particles and its weights. Compared with the other methods for equalization, the advantage of particle filtering is in that exploited approximation doesn't involve linearization around current estimates but rather approximations in the representation of the desired distribution by discreet random measures. The simulation shows that the algorithm is feasible even under the conditions of lower signal-to-noise ratio. © 2012 IEEE.

关键词： Blind equalization

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Study on the joint receiver used in MIMO system

Study on the joint receiver used in MIMO system

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Fu, Haiyang Shang, Zhijiao Cao, Shike Lu, Min College of Telecommunication and Information Engineering Nanjing University of Posts and Telecommunications Nanjing 210003 China

ISBN: (纸本)9780769546476

As multi-antenna being used in MIMO system to transmit signals with the same carrier frequency, one physical channel in MIMO will contain multi-virtual independent Rayleigh fading channels (VIRFC), among which very small relative time delay is existed, so the definition for the independent Rayleigh fading channel (IRFC) in MIMO theory is wrong. Also it is proved in the paper that joint receiver used in MIMO system could not transform these VIRFCs to IRSCs in the environment of MIMO system, so it is too difficult for MIMO system to be realized in CDMA mode or not. © 2012 IEEE.

关键词： Antenna phased arrays

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Convergence of hybrid steepest-descent methods with wn-mapping for generalized variational inequalities

Convergence of hybrid steepest-descent methods with wn-mappi...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Chen, Xiaomin Xie, Xuping Department of Information and Computing Science Chengdu Electromechanical College Chengdu 610031 China Department of Mathematic Chengdu University of Information Technology Chengdu 610225 China

In this paper, we consider the generalized variational inequality, to obtain its convergence theorem, we introduce iterative algorithm with infinite nonexpansive mapping to find approximate solution of the GVI (F, g, ... 详细信息

ISBN: (纸本)9780769546476

关键词： Nonlinear analysis

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Investigation and implementation of teaching methods of Java language

Investigation and implementation of teaching methods of Java...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Yang, Zhi Zhejiang Water Conservancy and Hydropower College Hangzhou China

ISBN: (纸本)9780769546476

The paper analyzed the characteristics of Java programming course. It analyzed the problems in the practical teaching of Java programming course. This paper presents several java curriculum reform ideas, tools and methods to stimulate the students' interest in learning, improve practical skills. The purpose of this paper is to develop rigorous logical thinking ability and creative ability, and to equip students with basic project development capabilities. Our Java curriculum reform is aimed to provide more qualified for the software industry, the Java application-oriented talents. © 2012 IEEE.

关键词： Students

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Simultaneous computation of wide-angle and wide-band base on asymptotic waveform evaluation

Simultaneous computation of wide-angle and wide-band base on...

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Li, Cui-Hua Wu, Jiang Department of Electronic Information and Electrical Engineering Hefei University Hefei China Hefei Haier Information Product Co. Ltd Hefei Haier China

ISBN: (纸本)9780769546476

the radar cross section(RCS)of a target is dependent on frequency as well as observation angle. the asymptotic waveform evaluation(AWE) technique is applied to predict the mono-static RCS of an arbitrarily shaped two-dimensional cylinder in both frequency and angular domains. the method of moments was used to solve the electric field integral equation, and the surface electric current density for a single angle and frequency was obtained. In the AWE technique, the surface current on the perfect electric conductor is expanded in a rational function via the Padapproximation. Using the function, the electric current distribution can be obtained at any angle and frequency within given angle and frequency range, which is used to compute the wide-angle and wide-band RCS. The numerical results are in good agreement with the results obtained by the method of moments at each frequency. © 2012 IEEE.

关键词： Radar cross section

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A two-step discretization algorithm based on rough set

A two-step discretization algorithm based on rough set

引用

2012 International Conference on Computer Science and Electronics Engineering, ICCSEE 2012

作者： Xu, Chenggang Xu, Yulong Xiao, Dawei Institute of Information and Technology Henan University of Traditional Chinese Medicine ZhengZhou 450003 China

ISBN: (纸本)9780769546476

A two-step discretization algorithm by dynamic clustering based on Rough set is proposed. The algorithm first discretization for decision table using dynamic clustering algorithm, then discrete again using cut importance discretization algorithms, and obtain the final cut sets, because the dynamic clustering algorithm processing speed is quickly and it impel a lot of breakpoint be screened, thus the operation efficiency of algorithm is increase notable. Finally, simulation results show that the proposed algorithm is correct and high efficiency. © 2012 IEEE.

关键词： Decision tables

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