一维Ginzburg-Landau超导方程组的渐近性态

本文讨论了一维Ginzburg-Landau超导方程组的渐近性态. 确定了当 Ginzburg-Landau参数趋于无穷大时, 稳态Ginzburg-Landau超导方程组以及发展型Ginzburg-Landau超导方程组的解列的极限, 并证明了当时间和Ginzburg-Landau参数均趋于无穷大时,发展型Ginzburg-Landau超导方程组的不对称的极限函数是渐近稳定的, 而对称的极限函数是非渐近稳定的.     

关于积分中值定理的一个结论(英文)

文 [1 ],[2 ]研究了当积分区间长度趋于零时 ,积分中值定理中间点的渐近性质 ,本文研究当积分区间长度趋于无穷时 ,积分中值定理中间点的渐近性质 .     

关于积分中值定理的一个结论

[1],[2]研究了当积分区间长度趋于零时,积分中值定理中间点的渐近性质,本研究当积分区间长度趋于无穷时,积分中值定理中间点的渐近性质。     

协变量维数可以趋于无穷的纵向数据的广义估计方程分析

广义估计方程(GEE)是分析纵向数据的常用方法.Balan,Schiopu-Kratina(2005)研究了协变量维数固定,GEE估计的渐近正态性.WANG(2011)研究了协变量维数趋于无穷,GEE估计的渐近正态性和响应变量是两点分布Wald统计量的渐近分布.本文证明协变量维数是固定的或趋于无穷,响应变量是任意分布的Wald统计量的渐近分布是卡方分布,Wald统计量可以直接用于统计推断.     

二阶非线性中立型微分方程的振动性和渐近性

本文建立了一类非线性二阶中立型微分方程一切解振动或者渐近趋于零的充要条件。     

Extended Fisher-Kolmogorov系统的渐近吸引子

考虑了ExtendedFisher-Kolmogorov系统的解的长时间行为,构造了一个有限维解序列即该系统的渐近吸引子,证明了它在长时间后无限趋于方程的整体吸引子,并给出了渐近吸引子的维数估计.     

高阶柯西中值定理中间点的渐近性及误差估计

利用洛必达法则研究长度趋于零和长度趋于无穷大的两类区间上高阶柯西值定理中间点的渐近性及其误差估计.     

满足Denjor猜测极值情况的整函数

对于满足Denjoy猜测极值情况的整函数,本文给出了这类函数沿着某些渐近路径趋于∞的最佳速度估计,证明了不存在有穷亏值,以及刻划了这类函数的Borel方向和相应于有穷渐近值的渐近路径在平面上的分布情况.     

积分中值定理中间点研究的一个新结果

对于区间长度趋于零,积分中值定理中间点的渐近性态作了进一步的研究,得到了一个新结果.     

关于积分中值定理的一个注记

研究当积分区间长度趋于无穷时 ,积分中值定理中间点的渐近性质     

Sequential Linear-Quadratic Method for Differential Games with Air Combat Applications

We present a numerical method for computing a local Nash (saddle-point) solution to a zero-sum differential game for a nonlinear system. Given a solution estimate to the game, we define a subproblem, which is obtained from the original problem by linearizing its system dynamics around the solution estimate and expanding its payoff function to quadratic terms around the same solution estimate. We then apply the standard Riccati equation method to the linear-quadratic subproblem and compute its saddle solution. We then update the current solution estimate by adding the computed saddle solution of the subproblem multiplied by a small positive constant (a step size) to the current solution estimate for the original game. We repeat this process and successively generate better solution estimates. Our applications of this sequential method to air combat simulations demonstrate experimentally that the solution estimates converge to a local Nash (saddle) solution of the original game.     

An achievement rate approach to linear programming problems with an interval objective function

In this paper, we focus on a treatment of a linear programming problem with an interval objective function. From the viewpoint of the achievement rate, a new solution concept, the maximin achievement rate solution, is proposed. Nice properties of this solution are shown: a maximin achievement rate solution is necessarily optimal when a necessarily optimal solution exists, and if not, then it is still a possibly optimal solution. An algorithm for a maximin achievement rate solution is proposed based on a relaxation procedure together with a simplex method. A numerical example is given to demonstrate the proposed solution algorithm.     

Global efficiency in multiobjective programming *

In this paper, we are concerned with global efficiency in multiobjective optimization. After exposing a property of a cone-subconvexlike function, we prove that a local weakly efficient solution, a local efficient solution and a local properly efficient solution are respectively a global weakly efficient solution, a global efficient solution and a global properly efficient solution of a multiobjective programming problem if cone- subconvexlikeness or cone-pre-invexity is assumed     

一类拟线性常微分方程的多解

说明一类拟线性特征值问题有两个正解;一个大解,一个小解。同时本也证明小解是一个山路解当参数大时发展成为尖解。     

AF—代数的闭的Jordan理想

讨论AF-代数的闭的Jordan理想。我们证明了AF-代灵敏的一个闭的子集是其一Jordan理想的充分必要条件是它是一个结合理想。     

A bifurcation phenomenon in a singularly perturbed two-phase free boundary problem of phase transition

In this paper, we prove a bifurcation phenomenon in a two-phase, singularly perturbed, free boundary problem of phase transition. We show that the uniqueness of the solution for the two-phase problem breaks down as the boundary data decreases through a threshold value. For boundary values below the threshold, there are at least three solutions, namely, the harmonic solution which is treated as a trivial solution in the absence of a free boundary, a nontrivial minimizer of the functional under consideration, and a third solution of the mountain-pass type. We classify these solutions according to the stability through evolution. The evolution with initial data near a stable solution, such as the trivial harmonic solution or a minimizer of the functional, converges to the stable solution. On the other hand, the evolution deviates away from a non-minimal solution of the free boundary problem.     

A note on the Helmholz oscillator

The possible existence of a potentially chaotic soliton solution of an unperturbed classical oscillator is investigated. It is shown that in general the solution of the so-called “Helmholz oscillator” is a periodic solution. Special solutions are also found where a localized soliton solution or a decaying solution is obtained depending on the initial conditions.     

On fourth-order elliptic boundary value problems with nonmonotone nonlinear function

This paper is concerned with the fourth-order elliptic boundary value problems with nonmonotone nonlinear function. The existence and uniqueness of a solution is proven by the method of upper and lower solutions. A monotone iteration is developed so that the iteration sequence converges monotonically to a maximal solution or a minimal solution, depending on whether the initial iteration is an upper solution or a lower solution.     

Periodic solutions in n dimensions and Volterra equations

If a nonlinear autonomous n-dimensional system of ordinary differential equations has a bounded solution with a certain uniform stability property, this solution approaches an almost periodic solution with the same stability property. (More precisely, the almost periodic solution is in the set of ω-limit points of the given solution.) If the bounded solution has, in addition to the uniform stability property, an asymptotic stability property, then the solution approaches a periodic solution with the same stability properties. Practical (i.e., computable) sufficient conditions for boundedness of solutions are obtained. The results are applied to generalized Volterra equations.     

群体决策问题的一种最优均衡解

本文引进了群体决策问题的一个最优解概念—s~*-最优均衡解,s~*-最优均衡解可以作为群体决策问题的一种解,它的实际意义是为所有的决策者找到一个最优解。我们证明了求解s~*-最优均衡解等价于求解一个相应的单目标优化问题,且在一定条件下s~*-最优均衡解总是存在的。我们也讨论按比例分配的s~*-最优均衡解问题。本文为解决群体决策问题提供了一种新的途径。