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Energy Efficient Beacon Discovering Scheme for Node Localization in Wireless Sensor Networks

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wuhan university Journal of Natural {2.s 2010年第4期15卷 303-307页

作者： LIU Xinxin1,2. ZHAO Erdun3. CHEN Kun2.1. School of Computer, wuhan {2., wuhan 43.072.{3., china 2. wuhan Digital Engineering Research Institute, wuhan 43.074,{3., china 3. department of Computer science, huazhong normal university, wuhan 430079,{3., china School of Computer Wuhan University Wuhan Hubei China wuhan Digital Engineering Research Institute Wuhan Hubei China department of Computer science Huazhong Normal University Wuhan Hubei China

Efficient sensor node localization is a crucial part of many location-dependent applications that utilize wireless sensor networks (WSNs). To cope with the problem of insufficient bea-con node for localization,we design a beacon discovery protocol in this paper that helps the blind node to find beacons nearby and present an energy efficient scheme for the beacon that receives the request from a blind node to adjust its radio range. We obtain the relationship between the mean energy consumption with adjust-ment number by the mathematical analysis. Numerical results show that great energy saving is achieved when the optimal ad-justment number is adopted.

关键词： localization wireless sensor networks energy- efficient radio range adjustment

On the Cayley-Bacharach property and the construction of vector bundles

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science china Mathematics 2011年第9期54卷 1891-1898页

作者： SUN Hao 1,2.1 department of Mathematics and Statistics,huazhong {2. {3.,wuhan 430079,china 2.department of Mathematics,East china {2. {3.,Shanghai 2.02.1,china department of Mathematics and Statistics Huazhong Normal University Wuhan China department of Mathematics East China Normal University Shanghai China

We study the Cayley-Bacharach property on complex projective smooth varieties of dimension n≥2.for zero dimensional subscheme defined by the zero set of the wedge of r-n + 1 global sections of a rank r≥n vector bund... 详细信息

关键词： Cayley-Bacharach property vector bundle reflexive sheaf k-very ample

Criteria for Regularity of Elliptic Diffusion Processes and It’s Application

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wuhan university Journal of Natural {2.s 2005年第2期10卷 347-350页

作者： LI Bo 1,2., ZHANG Xiao-min 3.1.School of Mathematics and Statistics,huazhong {2. university,{3. 430079,hubei,china 2.School of Mathematics and Statistics, {3. university, {3. 43.072.{12., china 3.Faculty of science,Ningbo university,Ningbo 3.52.1,Zhejiang, china School of Mathematics and Statistics Huazhong Normal University Wuhan Hubei China School of Mathematics and Statistics Wuhan University Wuhan Hubei China Faculty of science Ningbo University Ningbo Zhejiang China

The cone condition for x to be tegular for B under the elliptic diffusionprocess was proved. We also gave a necessary and sufficient condition for 0 to be regular for thornunder the elliptic diffusion process.

关键词： regular capacity thorn diffusion process

A Note on Abelian Extensions

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wuhan university Journal of Natural {2.s 2008年第1期13卷 6-8页

作者： YU Chuxiong1,2. FAN Yun3.1. School of Mathematics and Statistics, wuhan {2., wuhan 43.072.{3., china 2. School of Mathematics and Computer science, Jianghan {2., wuhan 43.056,{3., china 3. School of Mathematics and Statistics, huazhong normal university, wuhan 430079,{3., china School of Mathematics and Statistics Wuhan University Wuhan China School of Mathematics and Computer science Jianghan University Wuhan China School of Mathematics and Statistics Huazhong Normal University Wuhan China

Let K/Q be any abelian extension where Q is the field of rational numbers. By Galois theory and the Frobenius formula for induced characters, we prove that there exists a metabelian group G and an irreducible characte... 详细信息

关键词： abelian extensions metabelian groups induced characters Galois groups

Exploration of science Parks

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Chinese Journal of Population,Resources and Environment 2005年第1期3卷 55-59页

作者： Xiong Huibing & Sun Nengli 1 2.1. huazhong Agricultural university, {2.{3. 430079, china 2. Shandong normal university, Jinan Shandong 2.0014, china huazhong Agricultural university Wuhan Hubei 430079 China Shandong normal university Jinan Shandong 250014 China

science parks have developed greatly in the world, whereas empirical researches have showed that science parks based on linear model cannot guarantee the creation of innovation. Hi-tech innovation is derived from flow and management of information. The commercial and social interactions between in-parks and off-park firms and research institutions act as the key determinant for innovation. Industrial clustering is the rational choice for further developing Chinese science parks and solving some problems such as the lack of clear major industries and strong innovation sense, etc.

关键词： science parks hi-tech industry industrial clusters

Bose-Einstein Condensation in Linear Sigma Model at Hartree Approximation

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Communications in Theoretical Physics 2008年第5期49卷 1261-1264页

作者： SHU Song~(1,+) LI Jia-Rong~2. Faculty of Physics and Electronic Technology,hubei university,{2. 43.062.{3.2.Institute of Particle Physics,huazhong normal university,{2. 430079,{3. Faculty of Physics and Electronic Technology Hubei University Wuhan 430062 China Institute of Particle Physics Huazhong Normal University Wuhan 430079 China

The BEC of charged pions is investigated in the framework of O(4) linear sigma *** using Cornwall-Jackiw- Tomboulis formalism,we have derived the gap equations for the effective masses of the mesons at finite tempera-ture and finite isospin *** critical temperature and phase diagram of BEC are discussed in the non-chiral limitat Hartree approximation.

关键词： finite temperature field theory Bose-Einstein condensation phase transitions

Spectral anomalies and spectral switches of partially coherent and polychromatic light diffracted at an aperture

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science china(Physics,Mechanics & Astronomy) 2004年第1期47卷 24-35页

作者： Lü Baida1, 3.& PAN Liuzhan1, 2.1. Institute of Laser Physics and Chemistry, Sichuan university, Chengdu 610064,{2. 2. department of Physics, Luoyang {3. College, Luoyang 47102.,{2. 3. State Key Laboratory of Laser Technology, huazhong university of science and Technology, wuhan 43.074,{2. Correspondence should be addressed to L Baida (email: badalu@***) Received July 10, 2.03 Institute of Laser Physics and Chemistry Sichuan University Chengdu China State Key Laboratory of Laser Technology Huazhong University of Science and Technology Wuhan China department of Physics Luoyang Normal College Luoyang China

Based on the propagation theory of partially coherent light in the space-frequency domain, the anomalous spectral behavior and spectral switches in the far field of partially coherent and polychromatic light diffracted at an aperture are studied. It is shown that, as compared with spatially fully coherent and polychromatic light whose spectral anomalies are induced only by aperture diffraction, the spectral anomalies and spectral switches of partially coherent and polychromatic light depend on the aperture diffraction, spatial correlationβ and bandwidth of the original spectrum. Detailed numerical calculations are made to illustrate the behavior of spectral switches of partially coherent and polychromatic light, and the results for spatially fully coherent and polychromatic light are treated as a special case ofβ=1 and included in our theory.

关键词： spectral anomaly spectral switch partially coherent and polychromatic light far field aperture diffraction

Robustness and breakup of the spiral wave in a two-dimensional lattice network of neurons

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science china(Physics,Mechanics & Astronomy) 2010年第4期53卷 672-679页

作者： MA Jun 1,2. TANG Jun 2., ZHANG AiHua 3.& JIA Ya 2.1 department of Physics, Lanzhou {2. of Technology, Lanzhou 73.050, china 2.department of Physics, Central china normal {2., wuhan 430079, china 3.College of Electrical and Information Engineering, Lanzhou {2. of Technology, Lanzhou 73.050, china department of Physics Lanzhou University of Technology Lanzhou China department of Physics Central China Normal University Wuhan China College of Electrical and Information Engineering Lanzhou University of Technology Lanzhou China

The robustness and breakup of spiral wave in a two-dimensional lattice networks of neurons are investigated. The effect of small- world type connection is often simplified with local regular connection and the long-range connection with certain probability. The network effect on the development of spiral wave can be better described by local regular connection and changeable long-range connection probability than fixed long-range connection probability because the long-range probability could be changeable in realistic biological system. The effect from the changeable probability for long-range connection is simplified by multiplicative noise. At first, a stable rotating spiral wave is developed by using appropriate initial values, parameters and no-flux boundary conditions, and then the effect of networks is investigated. Extensive numerical studies show that spiral wave keeps its alive and robust when the intensity of multiplicative noise is below a certain threshold, otherwise, the breakup of spiral wave occurs. A statistical factor of synchronization in two-dimensional array is defined to study the phase transition of spiral wave by checking the membrane potentials of all neurons corresponding to the critical parameters(the intensity of noise or forcing current)in the curve for factor of synchronization. The Hindmarsh-Rose model is investigated, the Hodgkin-Huxley neuron model in the presence of the channel noise is also studied to check the model independence of our conclusions. And it is found that breakup of spiral wave is easier to be induced by the multiplicative noise in presence of channel noise.

关键词： spiral wave factor of synchronization breakup multiplicative noise robustness

Knockdown of CD146 reduces the migration and proliferation of human endothelial cells

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Cell Research 2006年第3期16卷 313-318页

作者： Yanyong Kang~(1,3. Fengcai Wang~(1,2. Jing Feng~1 Dongling Yang~1 Xu Yang~3.Xiyun Yan~11 National Laboratory of Biomacromolecules,Institute of Biophysics,Chinese Academy of {2. Beijing 100101,china 2.Chemistry department,Anyang teacher's College,Anyang 455000,china 3.College of Life {2.,Central china normal university,wuhan {12.,china National Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Science Beijing China College of Life science Central China Normal University Wuhan China Chemistry department Anyang teacher's College Anyang China

Our previous study has demonstrated that CD 146 molecule is a biomarker on vascular endothelium,which is involvedin angiogenesis and tumor *** the mechanism behind is not *** we have for the first time devel-oped a novel CD146 blockade system using CD146 siRNA to study its function on endothelial *** data showedthat CD146 siRNA specifically blocked the expression of CD146 on both mRNA and protein levels,leading to thesignificant suppression of HUVEC proliferation,adhesion and *** results demonstrate that CD146 playsa key role in vascular endothelial cell activity and angiogenesis,and CD146 siRNA can be used as a new inhibitor foranti-angiogenesis therapy.

关键词： small interfering RNA adhesion molecule CD 146 vascular endothelial cell