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A fingerprint feature extraction algorithm based on curvature of Bezier curve

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Progress in Natural Science:Materials International 2007年第11期17卷 1376-1381页

作者： Yuan Huaqiang1, Ye Yangdong2, Deng Jianguang2, Chai Xiaoguang1 and Li Yong1(1. School of Software, Dongguan university of technology, Dongguan 523808, china 2. information engineering institute, zhengzhou university, zhengzhou 450001, china) School of Software Dongguan University of Technology Dongguan 523808 China information engineering institute Zhengzhou University Zhengzhou 450001 China

Fingerprint feature extraction is a key step of fingerprint identification. A novel feature extraction algorithm is proposed in this paper, which describes fingerprint feature with the bending information of fingerprint ridges. Ridges in the specific region of fingerprint images are traced firstly in the algorithm, and then these ridges are fit with Bezier curve. Finally, the point that has the maximal curvature on Bezier curve is defined as a feature point. Experimental results demonstrate that this kind of feature points characterize the bending trend of fingerprint ridges effectively, and they are robust to noise, in addition, the extraction precision of this algorithm is also better than the conventional approaches.

关键词： fingerprint identification feature extraction Bezier curve curvature

Design and verification of an FPGA programmable logic element based on Sense-Switch pFLASH

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Frontiers of information technology & electronic engineering 2024年第4期25卷 485-499页

作者： zhengzhou CAO Guozhu LIU Yanfei ZHANG Yueer SHAN Yuting XU No.58 Research institute China Electronics Technology Group CorporationWuxi 214035China

This paper proposes a kind of programmable logic element(PLE)based on Sense-Switch pFLASH *** programming Sense-Switch pFLASH,all three-bit look-up table(LUT3)functions,partial four-bit look-up table(LUT4)functions,latch functions,and d flip flop(DFF)with enable and reset functions can be *** PLE uses a choice of operational logic(COOL)approach for the operation of logic functions,it allows any logic circuit to be implemented at any ratio of combinatorial logic to *** intrinsic property makes it close to the basic application specific integrated circuit(ASIC)cell in terms of fine granularity,thus allowing ASIC-like cell-based mappers to apply all their optimization *** measuring Sense-Switch pFLASH and PLE circuits,the results show that the“on”state driving current of the Sense-Switch pFLASH is about 245.52μA,and that the“off”state leakage current is about 0.1 *** programmable function of PLE works *** delay of the typical combinatorial logic operation AND3 is 0.69 ns,and the delay of the sequential logic operation DFF is 0.65 ns,both of which meet the requirements of the design technical index.

关键词： Field programmable gate array(FPGA) Programmable logic element(PLE) Boolean logic operation Look-up table Sense-Switch pFLASH Threshold voltage

Low-complexity distributed differential spacetime coding scheme for amplify-and-forward cooperative networks

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Science in china(Series F) 2009年第8期52卷 1418-1427页

作者： YU XiangBin1,2, BI GuangGuo3 & XU WeiYe4 1 College of information Science and technology, Nanjing university of Aeronautics and Astronautics, Nanjing 210016, china 2 Department of electronic engineering, City university of Hong Kong, Hong Kong, china 3 National Mobile Communications Research Laboratory, Southeast university, Nanjing 210096, china 4 Department of Communication engineering, Nanjing institute of technology, Nanjing 211167, china College of information Science and technology Nanjing University of Aeronautics and Astronautics Nanjing China Department of electronic engineering City University of Hong Kong Hong Kong China National Mobile Communications Research Laboratory Southeast University Nanjing China Department of Communication engineering Nanjing Institute of Technology Nanjing China

By introducing a space-time coding scheme based on amicable orthogonality, we develop a distributed differential space-time coding scheme with the amplify-and-forward （AF） method for wireless cooperative networks. The scheme requires no knowledge of the channel state information at both transmitters and receivers, and effectively decreases the realization complexity due to no channel estimation. Moreover, it has lower decoding complexity and higher coding advantage than the existing scheme, thus avoiding the shortcoming of exponential decoding complexity of some existing schemes. According to the pairwise error probability （PEP） analysis of the system, the power allocations of source and relay terminals are jointly optimized, and as a result, the PEP is minimized, which will provide a helpful guideline for system design. Numerical calculation and simulation results show that the developed scheme is superior to the existing scheme. Moreover, the scheme with optimal power allocation yields obvious performance improvement over that with equal power allocation.

关键词： differential space-time coding cooperative communication amplify-and-forward method power allocation

High sensitivity refractive index gas sensing enhanced by surface plasmon resonance with nano-cavity antenna array

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Chinese Physics B 2012年第8期21卷 416-420页

作者：赵华君 institute of information Optoelectronics technology and Application Departments of Electronic and Electrical EngineeringChongqing University of Arts and Sciences

The surface plasmon resonance gas sensor is presented for refractive index detection using nano-cavity antenna array. The gas sensor monitors the changes of the refractive index by measuring the spectral shift of the resonance dip, for modulating the wavelength of incident light. It is demonstrated that minute changes in the refractive index of a medium close to the surface of a metal film, owing to a shift in the resonance dip of the wavelength, can be detected. The average detection sensitivity is about 3200 nm/RIU （refractive index units）, which is more than twice that of a metal grating-based gas sensor. The reflectivity of the surface plasmon resonance dip is only - 0.03%, and the full widths at half maximum （FWHMs） of bandwidth of the angle and wavelength are - 0.20° and 4.71 nm, respectively.

关键词： subwavelength structures sensor resonators surface plasmons

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基于Web管理技术的安全网络管理系统

计算机工程 2002年第1期28卷 170-171,238页

作者：王海洲李晓解放军信息工程大学电子技术学院郑州450004

分析了基于的网络管理技术,提出了一种解决网络管理安全的方法,并结合基于的网络管理技术进行了安全管理系统的原WebWeb 型设计与实现。

关键词： Web 管理技术网络管理安全代理安全网络管理系统计算机网络

Using New Fusion Operations to Improve Trust Expressiveness of Subjective Logic

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Wuhan university Journal of Natural Sciences 2011年第5期16卷 376-382页

作者： ZHOU Hongwei1,2,3,SHI Wenchang1,2,LIANG Zhaohui1,2,LIANG Bin1,2 1.Key Laboratory of Data engineering and Knowledge engineering,Ministry of Education,Beijing 100872,china 2.School of information,Renmin university of china,Beijing 100872,china 3.institute of electronic technology,information engineering university of PLA,zhengzhou 450004,Henan,china Key Laboratory of Data engineering and Knowledge engineering Ministry of Education Beijing China School of information Renmin University of China Beijing China institute of electronic technology Information Engineering University of PLA Zhengzhou Henan China

Subjective logic provides a means to describe the trust relationship of the realworld. However, existing fusion operations it offers Weal fused opiniotts equally, which makes it impossible to deal with the weighted opinions effectively. A. Jcsang presents a solution, which combines the discounting operator and the fusion operator to produce the consensus to the problem. In this paper, we prove that this approach is unsuitable to deal with the weighted opinions because it increases the uncertainty of the consensus. To address the problem, we propose two novel fusion operators that are capable of fusing opinions according to the weight of opinion in a fair way, and one of the strengths of them is improving the trust expressiveness of subjective logic. Furthermore, we present the justification on their definitions with the mapping between the evidence space and the opinion space. Comparisons between existing operators and the ones we proposed show the effectiveness of our new fusion operations.

关键词： trust subjective logic opinion fusion weizht

A multicast routing algorithm with multiple trees

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Journal of Systems engineering and electronics 2005年第2期16卷 426-432页

作者： Cui Xunxue 1,2 , Gao Wei3 & Fang Hongyu41. New Star Research institute of Applied technology, Hefei 230031, P. R. china 2. Jiangsu Key Laboratory of Computer information Processing technology,Soochow university, Suzhou 215006, P. R. china 3. Department of electronic engineering and information Science,university of Science and technology of china, Hefei 230027, P. R. china 4. School of electronic Science and technology, Anhui university, Hefei 230039, P. R. china New Star Research institute of Applied technology Hefei 230031 P. R. China 2. Jiangsu Key Laboratory of Computer information Processing technology Soochow University Suzhou 215006 P. R. China Department of electronic engineering and information Science University of Science and Technology of China Hefei 230027 P. R. China School of electronic Science and technology Anhui University Hefei 230039 P. R. China

Quality of service (QoS) multicast routing has continued to be a very important research topic in the Internet. A method of multicast routing is proposed to simultaneously optimize several parameters based on multiobjective genetic algorithm, after the related work is reviewed. The contribution lies on that the selection process of such routing is treated with multiobjective optimization. Different quality criterions in IP network are taken into account for multicast communications. A set of routing trees is generated to approximate the Pareto front of multicast problem. Multiple trees can be selected from the final set of nondominated solutions, and applied to obtain a good overall link cost and balance traffic distribution according to some simulation results.

关键词： multicast routing quality of service multiobjective optimization genetic algorithms.

A MULTICAST KEY MANAGEMENT SCHEME BASED ON CHARACTERISTIC VALUES OF MEMBERS

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Journal of electronics(china) 2012年第Z2期 294-301页

作者： Du Xiaoqiang* ** Bao Wansu* Fu Xiangqun* *(institute of electronic technology, PLA information engineering university, zhengzhou 450004, china) **(Unit 95019 of the PLA, Xiangyang 441800, china)

A new collusion attack on Pour-like schemes is proposed in this paper. Then, we present a collusion-free centralized multicast key management scheme based on characteristic values of members. The re-keying method that other group members calculate new keys when a member is joining or leaving is also designed. It achieves forward secrecy and backward secrecy. Compared with typical existing centralized schemes, the storage of Group Key Controller (GKC) in our scheme halves the storage overhead of others, and communication overhead of GKC is 2 in case of joining re-keying. Especially, the leaving re-keying overhead is and the overall performance is excellent.

关键词： Security multicast Key management Characteristic values Collusion Re-keying

Dam risk assistant analysis system design

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Science china(Technological Sciences) 2008年第S2期51卷 101-109页

作者： HE XianFeng1,2,3,GU ChongShi3,4,WU ZhongRu3,4 & SU HuaiZhi3,4 1 Yellow River institute of Hydraulic Research,zhengzhou 450003,china 2 Embankment Security Defect Prevention and Control engineering Research Center of MWR,zhengzhou 45000,china 3 College of Water Resources and Hydropower engineering,Hohai university,Nanjing 210098,china 4 National engineering Research Center of Water Resources Efficient Utilization and engineering Safety,Hohai university,Nanjing 210098,china Yellow River institute of Hydraulic Research Zhengzhou China Embankment Security Defect Prevention and Control engineering Research Center of MWR Zhengzhou China College of Water Resources and Hydropower engineering Hohai University Nanjing China National engineering Research Center of Water Resources Efficient Utilization and engineering Safety Hohai University Nanjing China

In order to reduce the labor intensity and task difficulty of dam risk analysis and to meet the actual requirement of dam risk analysis,it is necessary to establish a dam risk assistant analysis *** program structure and the implementation ways of the dam risk assistant analysis system are analyzed,and a procedural framework with "three-tier and multi-database" structure and "level structure" is *** concept of dam risk assessment system modular development is proposed and the coupled mode of function module and data is ***,the dam risk assistant analysis system is developed using Delphi visual programming language.

关键词： dam risk risk analysis assistant analysis system