摘要：
Using techniques developed by Kuznetsov to discrete-time systems, we study the stability of the equilibrium and Neimark — Sacker bifurcation (also called Hopf bifurcation for map) of a tri-neural network system. The theoretical analyses are verified by numerical simulations. Our results have potential applications in neural networks.
摘要：
The surface diffusion of Pt dimers on Wulff polyhedral clusters with 586-12934 atoms was studied by the embedded atom method. The minimum energy diffusion path and the corresponding energy barrier for dimer diffusion on cluster surfaces were determined through a combination of the quenched Molecular Dynamics and the Nudged Elastic Band method. It was found that the diffusion of a dimer across the step-edge by dissociation and consecutive single-atom exchange with the edge atoms, rather than diffusion over the edge as a unit. Therefore, the step can enhance the dissociation of the dimer. For small Wulff polyhedral clusters containing up to 2000 atoms, the energy barrier for dimer diffusion from the {111} to the {100} facet is almost equal to that for the single adatom diffusion on the flat {111} surface. From the calculated cluster size dependence of the energy barrier, we conclude that the Wulff polyhedral cluster is stable, as the cluster has more than about 2000 atoms.
会议论文集名称：
Proceedings of 2012 IEEE 3rd international conference on emergency management and management sciences
关键词：
NURBS Surface;Generation Method;MATLAB
摘要：
NURBS surface is defined as a bi-parameter condition, so you can construct a NURBS surface may be calculated surface points the two aspects of some parameters of the algorithm. Build the way surface grid method has higher accuracy than. Also, when the surface of the normal vector calculation pointed out that the surface point can be got. It is to alleviate the surface of the isometric construction. The results show that NURBS surface generation method is effective and strategy, and by adjusting the produce come quadrilateral surface is feasible to control some of the areas.
摘要：
In this paper, the alternating Oppenheim expansion over the field of p-adic are studied. Metric properties, such as strong and weak number laws, central limit theorem, and iterated logarithm law of the digits occurring in this expansion are considered.
摘要：
In this paper, the Sylvester expansion over the field of p-adic is studied. Strong and weak number laws, central limit theorem, and iterated logarithm law of the digits occurring in this expansion are considered. At the same time, the approximation orders by rational fractions which are the partial sums of the series are investigated.
会议名称：
The 1st International ELID-Grinding Conference(第一届镜面磨削技术国际会议)
会议时间：
2008-06-12
会议地点：
长沙
会议论文集名称：
The 1st International ELID-Grinding Conference(第一届镜面磨削技术国际会议)论文集
关键词：
SEI infectious disease model;time delay, Hopf bifurcation;periodic solutions;stability
摘要：
In this paper, a SEI model with delay is investigated, where the time delays are regarded as parameters. Its dynamics are studied in terms of local analysis and Hopf bifurcation analysis. By analyzing the associated characteristic equation, it is found that Hopf bifurcation occurs when these delays pass through a sequence of critical value. A formula for determining the direction of the Hopf bifurcation and the stability of bifurcating periodic solutions is given by using the normal form method and center manifold theorem.
期刊：
Communications in Statistics - Theory and Methods,2007年36(12):2263-2272 ISSN：0361-0926
通讯作者：
Miao, Yu
作者机构：
[Miao, Yu] Wuhan Univ, Dept Math & Stat, Wuhan 430072, Hubei, Peoples R China.;Henan Normal Univ, Coll Math & Informat Sci, Henan, Peoples R China.;Hunan Agr Univ, Coll Sci, Hunan, Peoples R China.
通讯机构：
[Miao, Yu] W;Wuhan Univ, Dept Math & Stat, Wuhan 430072, Hubei, Peoples R China.
会议名称：
Workshop on Skew Distributions - Inference and Applications
会议时间：
DEC 06-07, 2004
会议地点：
Guanajuato, MEXICO
会议主办单位：
Wuhan Univ, Dept Math & Stat, Wuhan 430072, Hubei, Peoples R China.^Henan Normal Univ, Coll Math & Informat Sci, Henan, Peoples R China.^Hunan Agr Univ, Coll Sci, Hunan, Peoples R China.
关键词：
Central limit theorem;EV regression models;LS estimator
摘要：
In this article, we obtain the central limit theorems for LS estimator in simple linear errors-in-variables (EV) regression models under some mild conditions. And we also show that those conditions are necessary in some sense.
