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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111-120 订阅

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The Performance of Tracking Loop Filter for Software GPS Receiver Simulation Analysis

The Performance of Tracking Loop Filter for Software GPS Rec...

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Gaoshun Song Changming Wang Fanghua Xi Aijun Zhang Department of Precision Instrument Nanjing University of Science & Technology Nanjing Jiangsu China 210094

The design of tracking loop filter for software GPS receiver is flexible, and the performances of different tracking loop fllters are analyzed in software receiver. The design methods and characteristics of second-order tracking loop filter, the third-order tracking loop filter, and the secondorder IMU-assisted-based tracking loop filter are introduced. The tracking loop filter model based on the Kalman filter is designed, and the simulation result shows that, the Kalman tracking loop filter can accurately track the dynamic signal. Because that the IMU can remove most of dynamics from the incoming signal between the satellite and receiver, allowing for a tightening of the signal tracking loops and a commensurate improvement in noise mitigation.

关键词： software receiver tracking loop IMV-assisted Kalman filtering

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引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Quan Sun Nengqiang He Lei Xu Yipeng Li Yong Ren Department of Electronic Engineering Tsinghua University Beijing China

Collaborative filtering systems have achieved great success in both research and business applications. One of the key technologies in collaborative filtering is similarity measure. Cosine-based and Pearson correlation-based methods are popular ways for similarity measure, but have low accuracy. In this paper, we propose a novel method for similarity measure, referred as hierarchical pair-wise sequence (HPWS). In HPWS, we take into account both the sequence property of user behaviors and the hierarchical property of item categories. We design a collaborative filtering recommendation system to evaluate the performance of HPWS based on the empirical data collected from a real P2P application, i.e. "byrBT" in CERNET. Experiment results show that HPWS outperforms traditional Cosine similarity and Pearson similarity measures under all scenarios.

关键词： Similarity Measure Sequence Matching Hierarchical Graph Collaborative Filtering

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Persian Banknote Recognition Using Wavelet and Neural Network

Persian Banknote Recognition Using Wavelet and Neural Networ...

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： F.PoorAhangaryan T.Mohammadpour A.kianisarkaleh Sama technical and vocational training college Islamic Azad University Tonekabon Branch TonekabonIran

In this paper a new Persian banknote recognition system using wavelet transform and neural network has been proposed. The required images for the selected banknotes are obtained using a scanner. The color images are first converted to gray scale images, and then the discrete wavelet transform (I)WT) is applied on the selected images and features are extracted. Finally, a multi layered Perceptron (MLP) Neural Network (NN) is presentedto classify eight classes of interest, which are 50, 100, 200, 500, 1000, 2000, 5000 and 10000 toman notes. The system was implemented and tested using a data set of 320 samples of Persian banknotes;40 images for each sign (from both sides). The experiments showed excellent classification results. The system was able to recognize more than 99％ of all data, correctly.

关键词： Persian banknote pattern recognition wavelet transform neural network

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Modeling the Complex Systems of International Electronic Trade Financing Portfolio

Modeling the Complex Systems of International Electronic Tra...

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Ya Li Business School of Xian International University XianPRChina

ISBN: (纸本)9781467306898

How to help enterprises realize cost minimum and profits maximum, which is the goal of many foreign trade enterprises. Based on the theoretical basis and practical basis,this paper analyse international trade financing portfolio under cost constraints, for MK corporate case, raise the financing strategy of corresponding to the greast financing amounts under financing constraints.

关键词： Computer Programming Procedural Programming Modeling of Complex Systems

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Research for Spatial Interpolation Based on Cloud Computing

Research for Spatial Interpolation Based on Cloud Computing

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Hanyu Lu Zhiyong Cao Key Laboratory of Eearth Exploration & Information Techniques of Ministry of Education Chengdu Univ Department of Science and Technology Guizhou Radio & TV University Guiyang 550004 China

In view of shortage of traditional spatial interpolation calculation needs a lot of time, putting forward spatial interpolation calculation method based on cloud calculation. This paper builds cloud computing platform of space interpolation calculation, discusses the key technologies of the cloud computing in realization spatial interpolation calculation, emphases load balancing schedule between client's Map / Reduce and client. Tests show that cloud-based spatial interpolation improves the efficiency of execution time, it is conducive to parallel computing, and it has some theoretical significance and application value.

关键词： Cloud computing cloud services spatial interpolation client-side aggregation service

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Spectral Reconstruction of Hyperion Data Based on FLAASH Model

Spectral Reconstruction of Hyperion Data Based on FLAASH Mod...

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Suihua Liu Lei Yan Yini Duan Bin Yang Institute of Remote Sensing & Geographic Information System Peking University Beijing 100871 China Beijing Key Lab of Spatial Information Integration and its Applications Peking University Beijing 100871China

A method of spectral reconstruction based on FLAASH (Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes) is introduced in this paper. A scene of Hyperion image is adopted with hypersepctral data in October 14th, 2008 in the Mountainous regions of Guizhou. The FLAASH model is adopted spectral reconstruction five typical objects. Atmospheric water vapor absorption band are removed(1346nm-1467nm and 1800nm-1971nm). The results show that, Vegetation reflectance in the visible band has a significant reflectance peak in green band, and have high reflection in the near infrared region due to multiple scattering effects. Water in the entire spectral range has a low reflection. Experiment and reasonable result could be achieved to improve performance of Hyperion,.

关键词： hyperion atmosphere correction spectral reconstruction FLAASH

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Security in the Internet of Things: A Review

Security in the Internet of Things: A Review

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Jianqi Liu Caifeng Zou Hui Suo Jiafu Wan College of Information Engineering Guangdong Jidian Polytechnic Guangzhou China College of Information Engineering Guangdong Jidian Polytechnic Guangzhou China School of Computer

In the past decade, internet of things (IoT) has been a focus of research. Security and privacy are the key issues for IoT applications, and still face some enormous challenges. In order to facilitate this emerging domain, we in brief review the research progress of IoT, and pay attention to the security. By means of deeply analyzing the security architecture and features, the security requirements are given. On the basis of these, we discuss the research status of key technologies including encryption mechanism, communication security, protecting sensor data and cryptographic algorithms, and briefly outline the challenges.

关键词： internet of things security privacy confidentiality challenges

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A key management scheme based on cluster radiation matrix in WSN

A key management scheme based on cluster radiation matrix in...

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Xiaopeng Cui Yongping Zhang School of computer science and technology China University of Mining and Technology CUMT Xuzhou China

This Wireless sensor networks will be mapped to the matrix, the points on the matrix form different clusters, cluster heads according to their load and communication cost make the sensor cluster, the cluster key space corresponds with the set of key pool one to one, the sensor nodes select keys from the key subset which they belong to, establishing shared key with the cluster nodes easily. Nodes in different clusters between clusters can point to something within the matrix east, west, south, north, southeast, northeast, southwest, northwest of radiation to establish a shared key. The paper presents a wireless sensor networks key management scheme based on cluster radiation matrix, which has great scalability and anti-destroying ability.

关键词： WSN Key Pre-distribution Matrix radiation

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A Self-rollback System for Vulnerability Attack

A Self-rollback System for Vulnerability Attack

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Hong GAN Dan PAN Guangzhou City Construction College Guangzhou. China Guangzhou City Construction College Guangzhou China

In the paper attacks in view of the procedure loophole, proposed when the procedure movement from restores and returns draws hack the method. First knows in the method to the procedure entrance point returns as the procedure draws hack the spot, next when procedure collapse distinguishes and locates the procedure loophole, finally analyzes between the loophole input and exterior input dependent relations distinguishes the triggering procedure loophole the procedure entrance point, and returns to this input point correspondence procedure draws back an achievement this procedure from to restore returns draws back the condition to carry on to the procedure draws back, causes the procedure to be possible to continue the normal operation. The experimental result indicated that, the method can succeed the recognition to attack to the realistic software loophole and completes the procedure from to restore draws back.

关键词： Computer security Loophole attack identify vulnerability program self-rollback

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A new method for solving inverse kinematics of an industrial robot

A new method for solving inverse kinematics of an industrial...

引用

2012 International Conference on Computer Science and Electronic Engineering(2012 IEEE计算机科学与电子工程国际会议 ICCSEE 2012)

作者： Jing HUANG Xianlun WANG Dongsheng LIU Yuxia CUI College of Electromechanical Engineering Qingdao University of Science and Technology Qingdao China

The kinematics model of robot is established based on the specific structure of 6R robot. In consideration of the robot base movement and the actuators replacement, the key problem of robot inverse kinematics is separated and a new simple method for deriving inverse kinematics without complex matrix inversion is developed. Furthermore, by analyzing the procedure of solution, the author optimizes the solution algorithm in favor of programming realization to satisfy the demand of off-line programming and real-time control. Finally, the validity of the solution of forward and inverse kinematics is verified by simulation experiments. And the result can be used on the robot which has similar mechanical configurations.

关键词： industrial robot inverse kinematics simulation

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