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101.
In this paper, motivated by Zhu et al. methods [Z.B. Zhu, K.C. Zhang, J.B. Jian, An improved SQP algorithm for inequality constrained optimization, Math. Meth. Oper. Res. 58 (2003) 271-282; Zhibin Zhu, Jinbao Jian, An efficient feasible SQP algorithm for inequality constrained optimization, Nonlinear Anal. Real World Appl. 10(2) (2009) 1220-1228], we propose a type of efficient feasible SQP algorithms to solve nonlinear inequality constrained optimization problems. By solving only one QP subproblem with a subset of the constraints estimated as active, a class of revised feasible descent directions are generated per single iteration. These methods are implementable and globally convergent. We also prove that the algorithms have superlinear convergence rate under some mild conditions. 相似文献
102.
《复变函数与椭圆型方程》2012,57(3):177-181
In this paper, we will show some deviation theorems and theorems of rotational angles in classes of Σ(p) and Σ(p,q) of meromorphic univalent functions. 相似文献
103.
Commutator inequalities for Hilbert space operators 总被引:3,自引:0,他引:3
We prove singular value inequalities for positive operators. Some of these inequalities generalize recent results for commutators due to Bhatia-Kitttaneh, Kittaneh, and Wang-Du. Applications of our results are given. 相似文献
104.
Matthew S. Bothner Toby E. Stuart Harrison C. White 《The Journal of mathematical sociology》2013,37(4):261-295
This article examines the effects of status differentiation on the cohesion of a social structure. Using a formal model, we simulate the fates of a hypothetical cohort of newly hired employees, who are equals in the eyes of their boss and in the nascent stages of sorting into a status hierarchy. We cast these employees in a process in which they exert effort, receive public approval from the boss in exchange, and thus come to fill different places in a status order. We then consider the circumstances under which these workers cohere as a group and when, by contrast, differentiation makes cohesion among them unlikely. Our results show that the extent of the boss's autonomy in relationship to employees accounts for this difference in outcomes. Under an autonomous boss, as differentiation transpires, status-based social forces break the group of workers apart. Conversely, when the boss occupies a compromised position, group-level cohesion coexists with differentiation. Our main contribution is the intuition that the cohesion-related consequences of status differentiation can substantially depend on the tie between contestants and their external audience. We conclude by developing conjectures for empirical research consistent with our main findings. 相似文献
105.
We prove two monotonicity properties of N(m,n), the number of partitions of n with rank m. They are (i) for any nonnegative integers m and n, and, (ii) for any nonnegative integers m and n such that n?12, n≠m+2, G.E. Andrews, B. Kim, and the first author introduced ospt(n), a function counting the difference between the first positive rank and crank moments. They proved that ospt(n)>0. In another article, K. Bringmann and K. Mahlburg gave an asymptotic estimate for ospt(n). The two monotonicity properties for N(m,n) lead to stronger inequalities for ospt(n) that imply the asymptotic estimate. 相似文献
N(m,n)?N(m+2,n),
N(m,n)?N(m,n−1).
106.
本文研究一类带奇异项及临界指数的方程 利用纤维方法证明方程在满足一定条件下正解的存在性. 相似文献
107.
108.
《Optimization》2012,61(1-4):237-254
This paper deals with stability of time-varying differential equations. New asymptotic stability conditions for time-varying continuous systems with more general assumptions are given. The Gronwall's inequality and its discrete-time versions play a crucial role in our investigation. 相似文献
109.
《Optimization》2012,61(6):907-926
The method of multipliers for variational inequalities with nonstrictly monotone cost mappings and convex differentiable constraints is considered. We prove the convergence of the method with an arbitrary value of the penalty parameter. We suggest to evaluate accuracy of solutions of auxiliary subproblems with the help of gap functions. 相似文献
110.
针对一类状态不可测的模糊输入时滞系统,应用平行分布补偿算法(PDC),设计了模糊观测器,提出了基于模糊观测器的输出反馈控制方法,给出了保证模糊时滞系统渐近稳定的新的充分条件.应用广义Lyapunov函数和线性矩阵不等式方法,证明了模糊输入时滞系统的渐近稳定性,同时给出了控制和观测增益矩阵的分离设计算法.仿真结果进一步验证了所提出的方法和条件的有效性. 相似文献