检索结果-南通市图书馆

Non-p-generic and Strongly Nonbranching Degree

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 1994年第1期10卷 30-41页

作者： Ding Decheng department of Mathematics nanjing university nanjing,210008 china department of Mathematics Nanjing University Nanjing China

It has been proved by the author that every p-generic degree is *** this paper we construct an *** which is strongly nonbranching and *** means that the class of nonbranching degrees does not coincide with the class o... 详细信息

关键词： Non-p-generic and Strongly Nonbranching Degree NB

POINCARE BIFURCATIONS IN POLYNOMIAL DIFFERENTIAL SYSTEMS

在线全文

学校读者我要写书评

暂无评论

Systems Science and Mathematical Sciences 1999年第2期12卷 166-174页

作者： LUO Dingjun(department of Mathematics, nanjing normal university, nanjing 210097, china) 南京师范大学数学系江苏南京

The Poincare bifurcations for polynomial differential systems are considered in this paper. Usually, the Pontryagin’s method of perturbed Hamiltonian systems are used to deal with such problem by studying the number and multiplicity of the zero points for certain Abelian integrals, and many results have been gived for concrete polynomial systems. But, the method is inapplicable to the case where the unperturbed system has complicated Hamiltonian function, or is integrable but non-Hamiltonian. We now start from a different angle to avoid the complicated calculations of the Abelian integrals and try to study the Poincare bifurcation from the Hopf bifurcations of all possible orders for the system, and give a complete result for the Poincare bifurcations of quadratic system in Bautin’s form.

关键词： Limit cycle Poincare bifurcation Hopf bifurcation.

Sorption behavior of U(VI), ^(234)U(VI) and ^(238)U(VI) onto fracture-filling clays in Beishan granite, Gansu: Application to selecting the site of high-level radwaste repository in china

在线全文

学校读者我要写书评

暂无评论

Science china Earth Sciences 2005年第10期48卷 1649-1655页

作者： MIN Maozhong1,2, LUO Xingzhang3, WANG Ju4, JIN Yuanxin4 & WANG Rucheng1 1. department of Earth Sciences, State Key Laboratory of Mineral Deposit Research, nanjing university, nanjing 210093, china 2. Center of Materials Analysis, nanjing university, nanjing 210093, china 3. department of Environmental Science and Engineering, nanjing university, nanjing 210093, china 4. Beijing Geology Institute, Nuclear Industry, Beijing 100029, china nanjing university Nuclear Industry

The first results of sorption experiments of U(VI), 234U(VI) and 238U(VI) onto original (unpurified) fracture-filling clays from No.1 monzonitic granite intrusion, Beishan area, Gansu Province, china are reported. The monzonitic granite intrusion is a potential location for a high-level radwaste (HLW) repository in china. The present experimental results show that the maximum U(VI) sorption reached 92% at near-neutral pH and the distribution coefficient (Kd) was 12.6 mL/g. A high sorption capacity of the fracture-filling clays in host rock on radioactive ele-ments is necessary for HLW deep geological disposal repository. No preferential sorption of 234U onto the clays was found. Finally, the sorption of U(VI) onto the clays was also modeled using a surface complexation model.

关键词： HLW geological disposal repository, granite, uranium, radionuclide, clay, sorption.

On consensus protocols for high-order multiagent systems

在线全文

学校读者我要写书评

暂无评论

控制理论与应用（英文版） 2010年第4期8卷 406-412页

作者： Jing KUANG,Jiandong ZHU (School of Mathematical Sciences,nanjing normal university,nanjing Jiangsu 210097,china) School of Mathematical Sciences Nanjing Normal University Nanjing Jiangsu China

In this paper,the static consensus problem and the dynamic consensus problem are considered for a class of high-order multiagent *** the proposed consensus protocols,necessary and sufficient conditions for the consensus problems are *** the static consensus protocol,the desired consensus speed can be achieved by adjusting feedback *** show the effectiveness of the proposed consensus protocols.

关键词： Consensus Multiagent systems Graph theory

A CONSTRUCTIVE PROOF OF THE INVERSION FORMULA FOR ZONAL FUNCTIONS ON SL(2, R)

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 1996年第1期17卷 81-88页

作者： XIAO CHANGBAI ZHENG WEIXING SU WEIYI (department of Mathematics, nanjing university nanjing 210093, china.) department of Mathematics Nanjing University Nanjing 210093 China

A constructive proof is given for the inversion formula for zonal functions on SL(2, R). A concretely constructed sequence of zonal drictions are proved to satisfy the inversion formula obtained by Harish-Chandra for compact supported infinitely differentiable zonal *** use of the property of this sequence somehow similar to that of approxination kernels,the authors deduce that the inversion formula is true for continuous zonal functions on SL(2, R)under some condition. The classical result can be viewed as a corollary of the results here.

关键词： Inversion formula Zonal function Approximation kernel

HUBER'S M-ESTIMATOR ON UNDERDETERMINED PROBLEMS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 1995年第2期13卷 130-143页

作者： Wang Jia-song Tang Sheng-rong (department of Mathematics, nanjing university, nanjing, china) 南京大学数学系江苏南京

After surveying the theoretical aspects of Huber's M-estimator on underdeter-mined problems, two finite algorithms are presented. Both proceed in a construc-tive manner by moving from one partition to an adjacent one. One of the algorithm,which uses the tuning constant as a continuation parameter, also has the facility to simultaneously estimate the tuning constant and scaling factor. Stable and efficient implementation of the algorithms is presented together with numerical results. The L1-norm problem is mentioned as a special case.

关键词： Za Pro HUBER’S M-ESTIMATOR ON UNDERDETERMINED PROBLEMS

Dynamics of Spin-2 Bose-Einstein Condensates

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第12期48卷 1041-1046页

作者： HOU Jing-Min department of Physics,Southeast university,nanjing 211189,china department of Physics Southeast University Nanjing 211189 China

We numerically simulate the dynamics of a spin-2 Bose-Einstein *** find that the initialphase plays an important role in the spin component *** spin mixing processes can fully cancel out due toquantum interference when taking some initial special *** all the spin mixing processes,the total spin is *** the initial population is mainly occupied by a component with the maximal or minimal magnetic quantum number,the oscillations of spin components cannot happen due to the total spin *** presence of quadratic Zeemanenergy terms suppresses some spin mixing processes so that the oscillations of spin components are suppressed in someinitial spin ***,the linear Zeeman energy terms have no effects on the spin mixing processes.

关键词： spinor Bose-Einstein condensates dynamics spin mixing

Morphology and the M_(BH)-σ_* relation for NLS1s

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2010年第S1期53卷 256-258页

作者： BIAN WeiHao & HUANG Li department of Physics and Institute of Theoretical Physics,nanjing normal university,nanjing 210097,china department of Physics and Institute of Theoretical Physics Nanjing Normal University Nanjing China

For a sample of 33 narrow-line Seyfert 1 galaxies(NLS1s)(z<0.1) from the Sloan Digital Sky Survey,we investigate their *** find that 24 NLS1s show clear bar structure and 9 NLS1s show no bar *** bar frequency in this ... 详细信息

For a sample of 33 narrow-line Seyfert 1 galaxies(NLS1s)(z4 NLS1s show clear bar structure and 9 NLS1s show no bar *** bar frequency in this NLS1s sample is about 70%.We do not find any difference in the location of NLS1s with or without bars on the MBH-σ* diagram.

关键词： active galaxies bar black hole mass

MULTIVALUED PERTURBATION TO NONLINEAR DIFFERENTIAL INCLUSIONS WITH MEMORY IN BANACH SPACES

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 1996年第2期17卷 237-244页

作者： XUEXINGMEI SONGGUOZHU departmentofMathemtics＆Mechanics SoutheastUniversityNanjing210018China. departmentofMathematics NanjingUniversityNanjing210008China.

The authors give the existence results to the nonlinear differential inclusion u'(t) ∈ Au(t) +F(t,ut), where A is a ganerator of equicontinuous semigroup and F is multivalued.

关键词： Differential inclusion with memory Equicontimuous semigroup Housdorff measure Kamke function