检索结果-南通市图书馆

Modulation on the collective response behavior by the system size in two-dimensional coupled cell systems

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2006年第3期49卷 304-312页

作者： ZHANG Jiqian1, SHEN Chuansheng1,2.& CUI Zhifeng1 1. college of Physics and Electronic Information, Anhui Normal University, Wuhu 2.1000, china 2. Department of Educational Technology,{2., anqing 246011, china college of Physics Electronic Information Anhui Normal University Wuhu 241000 China Department of Educational Technology Anqing Teachers College Anqing 246011 China

By the intracellular calcium ionic minimal model proposed by Berridge, we investigated the collective response of two-dimensional (N×N) coupled cell systems to the external stimulation using numerical simulation methods. With a coupled intensity fixed and an appropriate coupled cell number chosen, the kinetic system size resonance was discovered. At the same time, it was found that the system size responding to the external stimulation for different coupled intensities transferred too, especially when the coupled intensity increased, the range of the corresponding system size extended. These phe- nomena illustrate that the coupled cell number and the coupled intensity can play con- structive roles in noisy coupled systems, by which the biology system would probably improve its capability to respond to the external stimulation.

关键词： cell coupling,collective response,system size resonance

HYDROELASTIC VIBRATIONS AND LIQUID SLOSHING SUPPRESSION IN A RECTANGULAR TANK WITH ELASTIC SPACER

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2004年第3期16卷 336-340页

作者： CHENGXu-duo LIANGYong WENJi-hua SchoolofFoodScienceandEngineering NanjingUniversityofFinanceandEconomicsNanjing210003China

In this paper, the couple vibration of liquid and elastic spacer in arectangular tank is investigated. Two different velocity potential functions correspondingrespectively to the liquid above and below the elastic spacer are assumed. Complicated boundaryconditions corresponding to two velocity potential functions and vibrations of elastic spacer aregiven. Using the method of energy, the equation of couple frequency is obtained. Through numericalcomputation the natural frequencies that change according to the location and stiffness of thespacer are shown.

关键词： system dynamics liquid-solid coupling sloshing suppression liquid-filledspacecraft

ASYMPTOTIC BEHAVIOR OF SOLUTIONS TO A CLASS OF SECOND ORDER QUASILINEAR DIFFERENTIAL EQUATIONS WITH DELAY DEPENDING ON THE UNKNOWN FUNCTION

在线全文

学校读者我要写书评

暂无评论

Annals of Differential Equations 2011年第1期27卷 94-103页

作者： Luhong Ye(School of Math. and Computational Sciences,anqing teachers {{2.,anqing 246011,Anhui)

The asymptotic behavior of the solutions to a class of second order quasilinear differential equations is considered. The main results improve and generalize those in Elbert and Kusano [3].

关键词： asymptotic behavior delay second order differential equations

THE EQUIVALENT MECHANICAL MODELS OF LIQUID SLOSHING IN A SPHERICAL TANK WITH SPACER UNDER LOW GRAVITY

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2005年第1期17卷 110-116页

作者： CHENGXu-duo HUMei-zhu WENJi-hua SchoolofFoodScienceandEngineering NanjingUniversityofFinanceandEconomics.Nanjing210003China／／DepartmentofPhysicsAnqingTeachersCollegeAnqing246011China SchoolofFoodScienceandEngineering NanjingUniversityofFinanceandEconomicsNanjing210003China

The dynamics of liquid sloshing in a spherical tank with spacer under low gravity was investigated. By extending the characteristic functions, the frequencies of liquid free sloshing, reaction force and moments on the wall of tank were obtained. By mechanical equivalent principle, the equivalent models of spring vibrator damper of liquid sloshing were given. The numerical results obtained show when a spacer is inserted in the tank, the sloshing frequency of liquid and the sloshing mass of liquid will decrease.

关键词： low gravity liquid sloshing equivalent mechanical models

DYNAMIC CHARACTERISTICS OF LIQUID SLOSHING IN A TRANSVERSELY VIBRATING SPHERICAL TANK WITH A SPACER UNDER LOW GRAVITY

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2008年第6期20卷 762-769页

作者： CHENG Xu-duo HU Mei-zhu WEN Ji-hua School of Food Science and Engineering Nanjing University of Finance and Economics Nanjing 210003 China Department of Physics Anqing Teachers College Anqing 246011 China

The dynamic characteristics of liquid sloshing in a transversely vibrating spherical tank with spacer under low gravity were investigated. By expanding the characteristic functions, the frequencies and velocity potentials of liquid free-sloshing were obtained. The dynamic equations and boundary conditions of liquid sloshing in the traverse vibrational spherical tank with spacer under low gravity were derived. By modifying the velocity potentials of liquid free-sloshing, the velocity potentials of liquid sloshing in the traverse vibrating spherical tank with a spacer were obtained. Furthermore, the forces and the moments acting on tank wall were given. The numerical results show when a spacer is inserted in the tank, the sloshing frequencies of liquid and the forces acting on tank wall will decrease, but the moment of force to the centre of the tank which is caused by the force of liquid acting on the spacer will occur.

关键词： low gravity liquid forced sloshing sloshing suppression

DYNAMIC CHARACTERISTICS OF LIQUID SLOSHING IN A RECTANGULAR TANK UNDER LOW GRAVITY

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2006年第2期18卷 170-176页

作者： CHENG Xu-duo HU Mei-zhu LIU Zhi-yun School of Food Science and Engineering Nanjing University of Finance and Economics Nanjing 210003 China Department of Physics Anqing Teachers College Anqing 246011 China School of Food Science and Engineering Nanjing University of Finance and Economics Nanjing 210003 China

In this paper, the dynamics of liquid sloshing in a rectangular tank under low gravity was investigated. The basic frequencies and the velocity potentials of sloshing of liquid were obtained by expansion of the Fourier series. The characteristics of force and moment of the liquid acting on a rectangular tank were analyzed. The equivalent mechanical models of spring-vibrator-damper of sloshing of liquid were established with mechanical equivalent principle and numerical results were given. The numerical results show that the equivalent sloshing mass increases with the increase of gravity, and that the basic frequency and the equivalent sloshing mass increase with the increase of the liquid depth.

关键词： low gravity liquid sloshing equivalent mechanical model

Exponential attractors of the nonlinear wave equations

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1998年第16期43卷 1331-1335页

作者： DAI Zhengde 1 and MA Dacai 2.1. Department of Mathematics, Yunnan University, Kunming 650031, china 2. Department of Mathematics, Shangrao teachers {2., Shangrao 334000, china Department of Mathematics Yunnan University Kunming China Department of Mathematics Shangrao Teachers College Shangrao China

The (E, E)-type exponential attractors for the nonlinear wave equation were obtained by using the decomposition of operators and finite covering *** results solves the open problem of Eden et al.

关键词： nonlinearity wave equations exponential attractors.

STABILITY OF TIME VARYING SINGULAR DIFFERENTIAL SYSTEMS WITH DELAY

在线全文

学校读者我要写书评

暂无评论

Annals of Differential Equations 2008年第4期24卷 484-489页

作者： Zhang Hai1,2. Jiang Wei1 (1. School of Mathematical Sciences, Anhui University, Hefei 2.0039 2. School of Math. and Computation Sci., anqing teachers college, anqing 246011, Anhui)

In this paper, stability of time varying singular differential systems with delay is considered. Based on variation formula and Gronwall-Bellman integral inequality, we obtain the exponential estimation of the solution and the sufficient conditions under which the considered system is stable and exponentially asymptotically stable. These results will be very useful to further research on Roust stability and control design of uncertain singular control systems with delay.

关键词： singular differential systems with delay time varying exponential estimation stability

Potential control of horseradish peroxidase immobilization on gold electrode

在线全文

学校读者我要写书评

暂无评论

中国科学：化学英文版 2004年第2期47卷 134-141页

作者： GE Cunwang1,2. YU Wei1, LI Changan1, WANG Nanping2.& GU Ning1 1. Key Laboratory of Molecular and Biomolecular Electronics (Southeast University), Ministry of Education, Research Center for Nano-scale Science and Technology, Southeast University, Nanjing 2.0096, china 2. Department of Chemistry, Nantong teachers {2., Nantong 2.6007, china 1. Key Laboratory of Molecular and Biomolecular Electronics (Southeast University) Ministry of Education Research Center for Nano-scale Science and Technology Southeast University 210096 Nanjing China 2. Department of Chemistry Nantong Teachers College 226007 Nantong China

A new approach based on potential control was firstly used for the immobilization of horseradish peroxidase (HRP) as the model protein. The self-assembly monolayer (SAM) was prepared with 2.aminoethanethiol (AET) on the gold electrode. The charge on HRP was adjusted by means of the acidity of the phosphate buffer solution (PBS) for dissolving the HRP. The in-fluence of electric potential on HRP immobilization was investigated by means of colorimetric immunoassay of enzyme-substrate interaction (CIESI) using an automatic plate reader. The HRP modified electrodes were characterized with X-ray photoelectron spectroscopy (XPS) as well as atomic force microscope (AFM) on template-stripped gold surface. The potential for maximum immobilization of HRP was near the zero charge potential. The result indicates that controlled potential can affect the course of HRP immobilization without the loss of enzymic activity. It is of great significance for the control of biomolecular self-assembly and the intrinsic electric device.

关键词： electric potential control, horseradish peroxidase, immobilization, gold electrode, self-assembly.