排序方式: 共有28条查询结果,搜索用时 46 毫秒
1.
Tong ZHAO 《数学年刊B辑(英文版)》2022,43(2):195-208
This paper characterizes the limits of a large system of interacting particles distributed on the real line. The interaction occurring among neighbors involves two kinds of independent actions with different rates. This system is a generalization of the voter process, of which each particle is of type A or a. Under suitable scaling, the local proportion functions of A particles converge to continuous functions which solve a class of stochastic partial differential equations driven by Fisher-Wrig... 相似文献
2.
Jesús Gonzalo Pérez 《Geometriae Dedicata》2008,132(1):105-119
A simple dynamical condition is given for line fields within a contact structure, which is satisfied exactly by those line
fields which are common kernels of contact circles. Some convexity properties are established which are useful in the study
of contact circles up to homotopy. A necessary condition for extending a contact form to a contact circle is given. Based
on work of Lisca–Matić and Honda, concrete examples are given which show that the condition is not just homotopic but a geometric
one. The paper ends with an open question.
Dedicated to Fernando Varela, for many reasons. 相似文献
3.
Hoh 《Applied Mathematics and Optimization》2008,45(3):269-281
Pseudodifferential operators with negative definite symbols appear as generators of jump-type Markov processes. The purpose
of this paper is to treat the large jumps of the process by a perturbation approach for the generator. This is of particular
interest since in this way the generators are made accessible to a symbolic calculus of pseudodifferential operators. The
main auxiliary result consists of a characterization of tightness of the jump measures in terms of the symbol. 相似文献
4.
We study the asymptotic behavior of weak solutions to the stochastic 3D Navier-Stokes-α model as α approaches zero. The main result provides a new construction of the weak solutions of stochastic 3D Navier-Stokes equations as approximations by sequences of solutions of the stochastic 3D Navier-Stokes-α model. 相似文献
5.
We introduce upper and lower envelopes for sets of measures on an arbitrary topological space, which are then used to give
a tightness criterion. These concepts are applied to show the existence of optimal policies for a class of Markov control
processes.
Accepted 22 May 1998 相似文献
6.
Zhao Dong Jie Xiong Jianliang Zhai Tusheng Zhang 《Journal of Functional Analysis》2017,272(1):227-254
7.
Masatake Hirao Masanori Sawa Yuanyuan Zhou 《Journal of Combinatorial Theory, Series A》2011,118(2):634-640
In this paper we present a new 4-dimensional tight Euclidean 5-design on 3 concentric spheres, together with a list of all known tight Euclidean designs which has been updated since the last survey paper by Bannai and Bannai (2009) [6]. We also examine whether each of all known tight Euclidean designs has the structure of a coherent configuration. 相似文献
8.
This article considers a system with infinitely many interacting particles, starting with a system of n interacting particles that is described by a system of n stochastic differential equations for the time-varying locations and weights. Any particle in the system interacts with others through the weighted empirical measure Un formed by the sum of weighted Dirac measures on the n particles. Weak convergence of the weighted empirical measure is studied under suitable conditions, such as bounded initial values, and linear growth of drift and diffusion coefficients. Thereafter, the limit of the weighted empirical measures is identified to be a martingale solution of the infinite interacting system. 相似文献
9.
We propose and analyze a splitting-up scheme for the numerical approximation of the 3D stochastic Navier-Stokes-α model. We prove the convergence of the scheme to the unique variational solution of the 3D stochastic Navier-Stokes-α model when the time step tends to zero. 相似文献
10.