全文获取类型
收费全文 | 56篇 |
免费 | 0篇 |
专业分类
化学 | 3篇 |
数学 | 51篇 |
物理学 | 2篇 |
出版年
2021年 | 3篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 1篇 |
2012年 | 3篇 |
2011年 | 2篇 |
2009年 | 1篇 |
2007年 | 1篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2002年 | 4篇 |
1999年 | 5篇 |
1998年 | 1篇 |
1996年 | 4篇 |
1994年 | 2篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1977年 | 2篇 |
1975年 | 1篇 |
排序方式: 共有56条查询结果,搜索用时 31 毫秒
41.
A. A. Tolstonogov 《Proceedings of the Steklov Institute of Mathematics》2016,293(1):199-215
An evolution inclusion with the right-hand side containing the difference of subdifferentials of proper convex lower semicontinuous functions and a multivalued perturbation whose values are nonconvex closed sets is considered in a separable Hilbert space. In addition to the original inclusion, we consider an inclusion with convexified perturbation and a perturbation whose values are extremal points of the convexified perturbation that also belong to the values of the original perturbation. Questions of the existence of solutions under various perturbations are studied and relations between solutions are established. The primary focus is on the weakening of assumptions on the perturbation as compared to the known assumptions under which existence and relaxation theorems are valid. All our assumptions, in contrast to the known assumptions, concern the convexified rather than original perturbation. 相似文献
42.
We consider the problem of minimization of an integral functional with nonconvex with respect to the control integrand. We minimize our functional over the solution set of a control system described by two ordinary differential equations subject to a control constraint given by a multivalued mapping with closed nonconvex values. The coefficients of the equations and the constraint depend on the phase variables. One of the equations contains the subdifferential of the indicator function of a closed convex set depending on the unknown phase variable. The equation containing the subdifferential describes an input–output relation of hysteresis type. 相似文献
43.
A. A. Tolstonogov 《Siberian Mathematical Journal》2017,58(4):727-742
In a separable Banach space we consider a differential inclusion whose values are nonconvex, closed, but not necessarily bounded sets. Along with the original inclusion, we consider the inclusion with convexified right-hand side. We prove existence theorems and establish relations between solutions to the original and convexified differential inclusions. In contrast to assuming that the right-hand side of the inclusion is Lipschitz with respect to the phase variable in the Hausdorff metric, which is traditional in studying this type of questions, we use the (ρ–H) Lipschitz property. Some example is given. 相似文献
44.
A. A. Tolstonogov 《Proceedings of the Steklov Institute of Mathematics》2015,291(1):190-202
For a conflict-controlled dynamical system whose motion is described by neutraltype functional differential equations in Hale’s form and for a quality index that evaluates the motion history realized up to the terminal instant of time, we consider a differential game in the class of control-with-guide strategies. We construct an approximating differential game in the class of pure positional strategies in which the motion of a conflict-controlled system is described by ordinary differential equations and the quality index is terminal. We show that the value of the approximating game gives the value of the original game in the limit, and that the optimal strategies in the original game can be constructed by using the optimal motions of the approximating game as guides. 相似文献
45.
46.
47.
48.
A. A. Tolstonogov 《Journal of Mathematical Sciences》2009,162(3):407-442
We consider a control system described by an evolution equation with control constraint which is a multivalued mapping of
a phase variable with closed nonconvex values. One of the evolution operators of the system is the subdifferential of a time-dependent
proper, convex, and lower semicontinuous function. The other operator, acting on the derivative of the required functions,
is the subdifferential of a convex continuous function. We also consider systems with the following control constraints: multivalued
mappings whose values are the closed convex hulls of the values of the original constraint and multivalued mapping whose values
are the extreme points of the convexified constraint that belong to the original one. We study topological properties of the
sets of admissible “trajectory–control” pairs of the system with various control constraints and clarify the relations between
them. An example of a parabolic system with hysteresis and diffusion phenomena is considered in detail. Bibliography: 19 titles. 相似文献
49.
A.A. Tolstonogov D.A. Tolstonogov 《NoDEA : Nonlinear Differential Equations and Applications》1999,6(1):101-118
We establish the existence of extreme solutions for a class of nonlinear evolution inclusions with non-convex right-hand
side defined on an evolution triple of Banach spaces. Then we show that extreme solutions which belong to the solution set
of the original system are in fact dense in the solutions of the system with convexified right-hand side. Subsequently we
use this density result to derive nonlinear and infinite-dimensional version of the “bang-bang” principle for control systems.
An example of a nonlinear parabolic distributed parameter system is also worked out in detail.
Received November 21, 1997 相似文献
50.
We consider a control system described by a nonlinear second order evolution equation defined on an evolution triple of Banach spaces (Gelfand triple) with a mixed multivalued control constraint whose values are nonconvex closed sets. Alongside the original system we consider a system with the following control constraints: a constraint whose values are the closed convex hull of the values of the original constraint and a constraint whose values are extreme points of the constraint which belong simultaneously to the original constraint. By a solution to the system we mean an admissible trajectory-control pair. In this part of the article we study existence questions for solutions to the control system with various constraints and density of the solution set with nonconvex constraints in the solution set with convexified constraints. 相似文献