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A New Class of Finsler Metrics with Scalar Flag Curvature

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Journal of Mathematical Research with Applications 2012年第4期32卷 485-492页

作者： Weidong SONG ,Xingshang WANG School of mathematics and {2. science,Anhui normal university,Anhui 2.1000,P.R.China School of mathematics and {2. science Anhui Normal University Anhui 241000

In this paper,we study a new class of general(α,β)-metrics F defined by a Riemannian metric α,a 1-form β and C ∞ function φ(b2.s).We provide the projective factor of a class of general(α,β)-metrics F=αφ(b2.s... 详细信息

关键词： scalar flag curvature locally projectively flat general(α,β)-metrics.

11-Round Impossible Differential Algebraic Attack for Serpent Encryption Algorithm

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Wuhan university Journal of Natural sciences 2010年第3期15卷 232-236页

作者： HU Zhihua1,2. QIN Zhongping3 1. School of computer, Wuhan {2., Wuhan 430072. Hubei, China 2. College of Mathematical and Information sciences,Huanggang normal {2., Huanggang 438000, Hubei, China 3. School of Software Engineering, Huazhong {2. of science and Technology, Wuhan 430074, Hubei, China School of computer Wuhan University Wuhan Hubei China College of Mathematical and Information sciences Huanggang Normal University Huanggang Hubei China School of Software Engineering Huazhong University of Science and Technology Wuhan Hubei China

This paper explored algebraic features of nonlinear parts in Serpent encryption algorithm and offered an 11-round Serpent-12. impossible differential algebraic attack through utilizing the method in constructing S-box algebraic equations. The new method analyzed block ll-round Serpent with 2.2. selected plaintexts and 2.2. bytes memory space at the same time of giving a new design principle of S-box anti-algebraic attack.

关键词： impossible differential Serpent algebraic equation

Up-conversion emissions of Er^(3+)-Yb^(3+) codoped Al_2._3 nanoparticles by the arc discharge synthesis method

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science China(Physics,Mechanics & Astronomy) 2009年第7期52卷 1043-1046页

作者： DONG Bin1, CAO BaoSheng1, FENG ZhiQing1, WANG XingJun2. LI ChengRen3 & HUA RuiNian4 1 School of science, Dalian Nationalities {2., Dalian 116600, China 2.School of Electronics Engineering and computer science, Peking {2., Beijing 100871, China 3 College of Physics and Electronic Technology, Liaoning normal {2., Dalian 11602., China 4 College of Life science, Dalian Nationalities {2., Dalian 116600, China 1. School of science Dalian Nationalities University Dalian 116600 China 2. School of Electronics Engineering and computer {2. Peking University Beijing 100871 China 3. College of Physics and Electronic Technology Liaoning Normal University Dalian 116029 China 4. College of Life science Dalian Nationalities University Dalian 116600 China

The Er3+-Yb3+ codoped Al2.3 nanoparticles with an average particle size of about 50 nm have been synthesized by an arc discharge synthesis method. The green and red up-conversion emissions centered at about 52., 547 and 677 nm, corresponding respectively to the 2.11/2.4I15/2. 4S3/2.4I15/2.and 4 F9/2.4I15/2.transitions of Er3+, were detected by a 978-nm semiconductor laser diode excitation. The Annealing has evident effect on the up-conversion emissions of the samples: The red up-conversion emission is noticeable before annealing; however, the green up-conversion emission becomes predominant after annealing. The mixture of (Er,Yb)3Al5O12.and α-(Al,Er,Yb)2.3 phases is more favorable for green up-conversion emissions due to an enhancement of the ESA (I) of 4I11/2.a photon→4F7/2.and ET (III) of 2.5/2.Yb3+)+4I11/2.Er3+)→2.7/2.Yb3+)+4F7/2.Er3+) processes. The two-photon absorption up-conversion process is involved in the green and red up-conversion emissions. The results have proved that arc discharge synthesis is a new promising preparation technology for optical materials.

关键词： up-conversion Er3+-Yb3+ codoped Al2.3 arc discharge synthesis

On adjacent-vertex-distinguishing total coloring of graphs

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science China mathematics 2005年第3期48卷 289-299页

作者： ZHANG Zhongfu, CHEN Xiang’en, LI Jingwen, YAO Bing, LU Xinzhong & WANG Jianfang College of mathematics and Information science, Northwest {2. university, Lanzhou 730070, China Department of computer, Lanzhou {2. College, Lanzhou 730070, China Institute of Applied mathematics, Lanzhou Jiaotong university, Lanzhou 730070, China College of Information and Electrical Engineering, Lanzhou Jiaotong university, Lanzhou 730070, China Institute of Applied mathematics, Chinese Academy of sciences, Beijing 100080, China 1. College of mathematics and Information science Northwest Normal University 730070 Lanzhou China 2. Department of computer Lanzhou Normal College 730070 Lanzhou China 3. Institute of Applied mathematics Lanzhou Jiaotong University 730070 Lanzhou China 4. College of Information and Electrical Engineering Lanzhou Jiaotong University 730070 Lanzhou China 5. Institute of Applied mathematics Chinese Academy of Sciences 100080 Beijing China

In this paper, we present a new concept of the adjacent-vertex-distinguishing total coloring of graphs (briefly, AVDTC of graphs) and, meanwhile, have obtained the adjacent-vertex-distinguishing total chromatic number... 详细信息

关键词： graph, proper total coloring, adjacent-vertex-distinguishing total coloring, adjacent-vertex-distinguishing total chromatic number.

On the rigidity theorem for harmonic functions in Khler metric of Bergman type

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science China mathematics 2010年第3期53卷 779-790页

作者： LI Song-Ying 1,2. & WEI DongHuan 1 1 School of mathematics and {2. science, Fujian normal university, Fuzhou 350007, China 2.Department of mathematics, university of California, Irvine, CA 92.97-3875, USA 1. School of mathematics and {2. science Fujian Normal University Fuzhou 350007 China2. Department of Mathematics University of California Irvine CA 92697-3875 USA

The paper gives a method to generate the potential functions which can induce Khler metrics u = uij dz idz j of Bergman type on the unit ball B n in C n . The paper proves that if h ∈ C n (B n ) is harmonic in these metrics u ( u h = 0) in B n , then h must be pluriharmonic in B n . In fact, it is a characterization theorem, as a consequence, the paper provides a way to construct many counter examples for the potential functions of the metric u so that the above theorem fails. The results in this paper generalize the theorems of Graham (1983) and examples constructed by Graham and Lee (1988).

关键词： rigidity pluriharmonic Laplace-Beltrami operators u-harmonic

Solvation effects on brain uptakes of isomers of ^(99m)Tc brain imaging agents

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Chinese science Bulletin 2002年第21期47卷 1786-1791页

作者： JIA Hongmei, MA Xiaohui, WANG Cunxin & LIU Boli1. Department of Chemistry, Beijing normal university, Beijing 100875, China 2. Center for Biomedical Engineering, Beijing Polytechnic university, Beijing 10002., China 1. Department of Chemistry Beijing Normal University Beijing 100875 China 2. Center for Biomedical Engineering Beijing Polytechnic University Beijing 100022 China

Analysis of electrostatic hydration free energies of the isomers of the 99mTc-BAT and 99mTc-DADT complexes is carried out using the computer simulation technique. The results show that not only a correlation exists between the logarithm of the brain uptake and the electrostatic hydration free energy for the isomers of 99mTc-brain radiopharmaceu-ticals, but also a linear relationship exists between the logarithm of the ratio of the brain uptake of the syn isomer to that of the anti one and the difference between the electrostatic hydration free energy of the syn-isomer and that of the anti one. Furthermore, the investigation on the important factors influencing the brain uptakes of 99mTc-radiophar-maceuticals and the reasons of the different biodistribution of the isomers of the 99mTc-complexes is explored at the molecular level. The results may provide a reference for the rational drug design of brain imaging agents.

关键词： 99mTc-brain imaging agent isomer brain uptake electro-static hydration free energy.

Non-Rigid Object Tracking by Anisotropic Kernel Mean Shift

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Transactions of Tianjin university 2007年第5期13卷 370-374页

作者：齐苏敏黄贤武 School of Electronics and Information Engineering Soochow University Department of computer science Qufu Normal UniversityQufu 273165China

Mean shift,an iterative procedure that shifts each data point to the average of data points in its neighborhood,has been applied to object ***,the traditional mean shift tracker by isotropic kernel often loses the object with the changing object structure in video sequences,especially when the object structure varies *** paper proposes a non-rigid object tracker by anisotropic kernel mean shift in which the shape,scale,and orientation of the kernels adapt to the changing object *** experimental results show that the new tracker is self-adaptive and approximately twice faster than the traditional tracker,which ensures the robustness and real time of tracking.

关键词： object tracking mean shift anisotropic kernel modal matching

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SYN Flood攻击源代码分析

计算机工程与应用 2003年第7期39卷 36-39页

作者：陈波解放军理工大学通信工程学院南京师范大学计算机系南京210097

文章从程序设计的角度介绍了SYNFlood攻击的原理,并分析了攻击源代码,对涉及的Linux网络编程知识进行了研究。

关键词：拒绝服务攻击网络安全源代码分析 SYNFlood攻击计算机网络 TCP/IP协议程序设计

A hybrid approach of Knowledge Discovery in fishery resources evaluation

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西南师范大学学报(自然科学版) 1999年第5期 536-544页

作者： Li\ Li Department of computer science,Southwest China {2. university,Chongqing 400715

A framework is put for ward,which integrates Knowledge Discovery in Database (KDD) with case based reasoning (CBR) and Bayesian *** following tasks are fulfilled:(1)discovering refined rules;(2.retrieving structured data which can not be described by flat vector feature;(3)forecasting the location of central fishing ground for the next *** these have been applied to a real case with some encouraging and interesting results.

关键词： knowledge discovery in databases bayesian network case based reasoning causal network