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1.
本文在给出层次系统决策过程和讨论两种实际二层线性系统规划模型的基础上,提出了一类具有广泛典型代表性的二层线性系统规划模型。给出了这类二层系统线性规划模型解的两种等价形式和下层极值函数的几种表达式。  相似文献   

2.
用于组合有效性综合评价的非参数方法研究   总被引:2,自引:2,他引:2  
针对系统内部同类单元的联合问题,给出了一类基于样本数据评价组合有效性的非参数模型和方法,并探讨了评价组合有效性模型的性质、求解方法以及模型给出的组合有效性的经济含义。分析了组合有效单元与相应的多目标规划Pareto有效解之间的关系,探讨了外界条件变化对评价结果的影响。为了进一步在模型中反映决策者的偏好,给出了带有权重约束的评价组合有效性模型,并探讨了其相关性质。  相似文献   

3.
具有饱和增长趋势的若干曲线模型研究   总被引:6,自引:1,他引:5  
动植物生长和经济领域中的许多过程具有单调递增,增长有极限即具有饱和增长趋势的特点。本建立了三个能拟合,预测具有该特点的新的曲线模型;讨论了新型性质特点;论述了新建模型与已知模型的联系与区别,指出了新模型的特殊适用范围。  相似文献   

4.
个体与群体之间的一类博弈问题分析   总被引:7,自引:0,他引:7  
分析个体与群体之间的一类博弈问题,构造一对多博弈模型。其同时具有Stackelberg模型、演化博弈模仿者动态模型的特点:在博弈的第一阶段,有限理性的群体参与者采取模仿者动态行为;在博弈的第二阶段,完全理性的个体参与者根据群体参与者的策略分布,确定自己的反应函数。博弈达到稳定状态后,群体参与者采取演化稳定策略,而个体参与者的风险占优策略将收敛于Nash均衡策略。讨论模型的一些性质:有限理性的群体在模仿过程中存在收益损失;老练的个体参与者存在欺骗行为;在个体参与者完全理性决策的带引下,可以解决多重Nash均衡的选择问题。  相似文献   

5.
一类短生命周期产品供应链的联合契约   总被引:11,自引:1,他引:11  
刘斌  陈剑  刘思峰 《系统工程》2005,23(3):55-62
研究了一类短生命周期产品的销售渠道协调问题。首先针对产品销售分阶段采用不同策略的现实,设计了回购和价格补贴相融合的联合契约,并构建了动态规划模型对其加以刻画;然后,给出了联合契约实现系统协调的必要紊件,并围绕协调利润分割方案给出了确定契约参数的方法;最后,得出了如下结论:(1)单一契约的两阶段模型均是该联合契约的特例;(2)联合契约可灵活实现双方的协调利润分割,并且实现系统协调仅依赖于系统的成本结构;(3)在高风险的市场环境下,供应商将成为缔结联合契约的积极倡导者。  相似文献   

6.
基于约束理论的一个管理决策NLP模型   总被引:4,自引:1,他引:3  
在并行工程环境下,很广泛的一类管理决策过程可归结为一类线性约束NLP模型,本文依据约束理论(TOC)给出了确定“瓶颈”约束的定量方法,并提出了通过增加“瓶颈”约束的资源以有效地提高管理决策的整体综合效益的模型流程。  相似文献   

7.
GM(1,1)幂模型求解方法及其解的性质   总被引:7,自引:0,他引:7  
根据灰色系统信息覆盖的基本原理,给出了GM(1,1)幂模型中参数α的估计方法.讨论了α的不同取值对模型解的影响,对其白化微分方程解的定理进行了补充,并给出了白化微分方程解的优化方法.结果表明,所提出的建模方法更能适应于一类具有饱和状态或发展变化受众多因素影响的波动原始序列,在0<α<1且a>0和α>1且a<0两种情形下,GM(1,1)幂模型与灰色Verhulst模型具有相同的极限性质,但模拟预测精度高于灰色Verhulst模型.  相似文献   

8.
不确定微分方程是由典范过程驱动的一类微分方程,是一种描述不确定过程或不确定动态系统的新型数学工具.本文在研究网络舆情传播过程和传播类型的基础上,充分考虑网络舆情传播过程中存在的一些不确定因素,根据网络舆情传播的不同阶段提出相应的基于不确定微分方程的网络舆情传播模型.最后结合甘肃兰州自来水苯含量超标事件给出了衰退阶段模型的数值计算实例,预测结果与实际传播情况基本吻合.  相似文献   

9.
中国股市波动性过程中的长期记忆性实证研究   总被引:23,自引:1,他引:23  
应用一类描述金融市场波动性过程的长期记忆特征的分整自回归条件异方差模型(FIGARCH模型),研究了中国股票市场波动性过程的长期记忆性,实证结果表明中国股市波动性过程具有明显的长期记忆特征;文章还分析了FIGARCH模型与传统的条件方差模型相比,在模型描述和预测上所体现出的优越性。  相似文献   

10.
HLA联邦互操作性校核与验证研究   总被引:3,自引:0,他引:3  
刘飞  杨明 《系统仿真学报》2004,16(11):2388-2390,2394
互操作性是HLA联邦开发过程中必须解决的重要问题之一。本文对互操作性进行深入研究,给出了HLA联邦互操作性框架,对联邦的互操作性进行了分级描述;并且在该互操作性框架和联邦开发与执行过程的基础上,进一步给出了HLA联邦互操作性校核与验证的过程模型,用以指导联邦开发与执行过程中互操作性的评估。  相似文献   

11.
Let be the set of trees on 2k+1 vertices with nearly perfect matchings, and let be the set of trees on 2k + 2 vertices with perfect matchings. The largest Laplacian spectral radii of trees in and and the corresponding trees were given by Guo (2003). In this paper, the authors determine the second to the sixth largest Laplacian spectral radii among all trees in and give the corresponding trees. This research is supported by the National Natural Science Foundation of China under Grant No. 10331020.  相似文献   

12.
Let F=C(x1,x2,…,xe,xe+1,…,xm), where x1, x2,… , xe are differential variables, and xe+1,…,xm are shift variables. We show that a hyperexponential function, which is algebraic over F,is of form g(x1, x2, …,xm)q(x1,x2,…,xe)^1/lwe+1^xe+1…wm^xm, where g∈ F, q ∈ C(x1,x2,…,xe),t∈Z^+ and we+1,…,wm are roots of unity. Furthermore,we present an algorithm for determining whether a hyperexponential function is algebraic over F.  相似文献   

13.
We study two-weight norm inequality for imaginary powers of a Laplace operator in R^n, n ≥ 1, especially from weighted Lebesgue space Lv^p(R^n) to weighted Lebesgue space Lμ^p(R^n), where 1 〈 p 〈 ∞. We prove that the two-weighted norm inequality holds whenever for some t 〉 1, (μ^t, v^t) ∈ Ap, or if (μ, v) ∈Ap, where μ and v^-1/(p-1) satisfy the growth condition and reverse doubling property.  相似文献   

14.
均衡函数及其在变权综合中的应用   总被引:67,自引:6,他引:61  
进一步研究了均衡函数,改进了[4]中公理化体系,获得了两大数均衡函数及相应的变权模式并分析了这些模式之间的关系。  相似文献   

15.
高寒阴湿区陇薯6号氮磷用量及栽培密度配套模式研究   总被引:3,自引:0,他引:3  
通过两年的试验研究,利用二次通用旋转设计原理建立了氮肥(x1)、磷肥(x2)和栽培密度(x3)与陇薯6号产量(y)的回归方程,对方程进一步分析表明,各因素对产量影响的大小顺序是氮肥〉密度〉磷肥。陇薯6号产量大于39t/hm^2的栽培方案是:施纯氮122.56t/hm^2~177.50t/hm^2、磷102.74t/hm^2~167.26L/hm^2,栽培密度为52861株//hm^2~60580株/hm^2(行距60cm,株距27.5cm~31.5cm)。图4,表4,参7。  相似文献   

16.
This paper is devoted to the study of semi-bent functions with several parameters flexible on the finite field F2n.Boolean functions defined on F2n of the form f(r)ab(x) =Trn1(axr(2m-1))+Tr41(bx(2n-1)/5) and the form g(rs)abcd(x)=Trn1(axr(2m-1))+Tr41(bx(2n-1)/5)+Trn1(cx(2m-1)1/2+1)+Trn1(dx(2m-1)s+1) where n = 2m,m = 2(mod 4),a,c ∈ F2n,and b ∈ F(16),d ∈ F2,are investigated in constructing new classes of semi-bent functions.Some characteristic sums such as Kloosterman sums and Weil sums are employed to determine whether the above functions are semi-bent or not.  相似文献   

17.
In this paper, we investigate the growth of meromorphic solutions of higher order linear differential equation f^(k) +Ak-1 (z)e^Pk-1^(z) f^(k-1) +…+A1 (z)e^P1(z) f′ +Ao(z)e^Po(z) f = 0 (k ≤ 2), where Pj(z) (j = 0, 1,..., k - 1) are nonconstant polynomials such that deg Pj = n (j = 0, 1,..., k - 1) and Aj(z)(≠ 0) (j = 0, 1,..., k - 1) are meromorphic functions with order p(Aj) 〈 n (j = 0, 1,..., k - 1).  相似文献   

18.
1  IntroductionIn Ref.[1 ] some queueing indices of the Mx/ G( M/ G) / 1 repairable queueing system withsingle delay vacation were discussed,and the transient solution,stationary solution andstochastic decomposition of the queue length were obtained.Butwhile the service stationis up and operating,it is subject to breakdowns.Once the service station breaks down,there is a repair operation that bring the broken service station back to a new state andoperation immediately.So it is important to…  相似文献   

19.
The purpose of this paper is to present a general iterative scheme as below:
and to prove that, if {α n } and {r n } satisfy appropriate conditions, then iteration sequences {x n } and {u n } converge strongly to a common element of the set of solutions of an equilibrium problem and the set of fixed points of a nonexpansive mapping and the set of solution of a variational inequality, too. Furthermore, by using the above result, we can also obtain an iterative algorithm for solution of an optimization problem , where h(x) is a convex and lower semicontinuous functional defined on a closed convex subset C of a Hilbert space H. The results presented in this paper extend, generalize and improve the results of Combettes and Hirstoaga, Wittmann, S.Takahashi, Giuseppe Marino, Hong-Kun Xu, and some others. This research is supported by the National Natural Science Foundation of China under Grant No. 10771050.  相似文献   

20.
It has been observed in laboratory experiments that when nonlinear dispersive waves are forced periodically from one end of undisturbed stretch of the medium of propagation, the signal eventually becomes temporally periodic at each spatial point. The observation has been confirmed mathematically in the context of the damped Korteweg-de Vries (KdV) equation and the damped Benjamin-Bona-Mahony (BBM) equation. In this paper we intend to show the same results hold for the pure KdV equation (without the damping terms) posed on a finite domain. Consideration is given to the initial-boundary-value problem {ut+ux+uux+uxxx=0, u(x,0)=φ(x), 0〈x〈1, t〉0,u(0,t)=h(t), u(1,t) = 0, ux(1,t) = 0, t〉0.It is shown that if the boundary forcing h is periodic with small ampitude, then the small amplitude solution u of (*) becomes eventually time-periodic. Viewing (*) (without the initial condition) as an infinite-dimensional dynamical system in the Hilbert space L^2(0, 1), we also demonstrate that for a given periodic boundary forcing with small amplitude, the system (*) admits a (locally) unique limit cycle, or forced oscillation, which is locally exponentially stable. A list of open problems are included for the interested readers to conduct further investigations.  相似文献   

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