中医方药量化研究中方剂“归经强度”层次分析法模型和应用

初步探讨中医方药归经量化研究中方剂的"归经强度"模型和应用.根据中药归经理论,运用(量化)层次分析法进行研究,以四君子汤为例,给出中医方药归经量化中方剂"归经权重"和"归经强度"的计算模型.方剂归经强度模型能较准确的计算方剂的归经强度,不但创新了量化层次分析法而且实现了中医方剂"归经强度"差异性量化分析和合理性应用.     

多法并举现本质 一脉相承显新意--从一道高考向量选择题说起

通过对一道形式新颖的浙江高考向量选择题的解法研究,探讨了向量的几何背景.平面几何经常涉及距离(线段长度)、夹角问题,而平面向量的运算,特别是数量积运算主要涉及向量的模和向量之间的夹角,因此我们可以用向量法解决部分几何问题.本文主要运用了几何法、坐标法、三角不等式、构造函数法、基底法解决问题,大部分方法属于通性通法,具体涉及化归与转化、数形结合、函数与方程等数学思想.     

生成锥内部凸-锥-类凸集值优化问题的标量化和鞍点

讨论集值向量优化的标量化和鞍点问题.在生成锥内部凸-锥-类凸假设下,建立了集值向量优化问题在（弱）有效和Benson真有效意义下的标量化定理和鞍点定理.     

广义锥-s次类凸向量优化的标量化和鞍点定理

讨论序拓扑向量空间中的约束向量优化问题.在广义锥-s次类凸假设下,得到了向量优化问题关于δ-弱有效解的标量化定理和Lagrange泛函的鞍点定理.     

含参广义集值向量均衡问题有效解映射下半连续的最优条件

在实Hausdorff拓扑向量空间中研究一类含参广义集值向量均衡问题弱有效解与有效解映射的下半连续性. 在近似锥-次类凸的条件下, 运用标量化的方法得到弱有效解的标量化结果. 在适当条件下, 得到含参广义集值向量均衡问题弱有效解与有效解映射下半连续性定理.     

借用一个基本公式简解一组向量考题

在高考复习中,有这么一类向量考题,它以平面几何中的点线关系为背景,以向量的数量积为测试平台,以考查学生的化归能力为目标.这种将向量的数量积问题转化为代数、三角、解几问题的解题方法,其思维量很大,运算要求很高,推理路径很长;其求解过程绕来绕去,难以把握转化的方向.笔者在研究中发现这类向量数量积的考题,有一个共同特点:它们都是共点向量或可化为共点向量的数量积,可以借用一个基本公式转化命题,     

拟凸向量值映射次微分性质及优化问题的最优性条件

本文研究了拟凸向量值映射的次微分及其拟凸向量优化问题的最优性条件.首先,引进恰当K-拟凸的概念,并利用△函数对其进行标量化,得到恰当K-拟凸的等价刻画.然后,给出拟凸向量值映射的四种次微分的定义,并研究了它们的性质.最后,利用拟凸向量值映射的次微分研究拟凸向量优化问题弱有效解的最优性条件,并用例子说明其合理性.     

基于SVM的沪深300股指期货量化交易策略

基于支持向量机(svm)理论建立沪深300股指期货量化交易模型,与传统对期货价格走势进行绝对预测的回归预测方法不同,模型利用支持向量机在处理非线性系统中的分类优势,将价格未来变化的趋势转化为交易信号,把一个复杂的时间序列回归预测问题转化为二分类问题.接着,把价量信息和技术指标分别作为输入向量,再引入止损机制,在动态预测模型上构建量化交易策略.采用历史数据对策略进行回测仿真,实证结果表明,价量信息交易策略表现要好于技术指标交易策略,量化交易模型总体取得了较好的盈利效果.     

含参集值向量均衡问题各种有效解映射的下半连续性

在实Hausdorff拓扑向量空间中,引进含参集值向量均衡问题,给出各种有效解的概念.在锥-次类凸的条件下,得到各种有效解的标量化结果.结合集值映射的弱f-性,在适当假设条件下,得到含参集值向量均衡问题各种有效解映射的下半连续性.     

带变动序结构的向量优化问题的E-最优元

推广固定锥序下的改进集概念到变动序关系.引入了带变动序结构的向量优化问题的E-最优元.应用Tammer-Weidner意义下的非线性标量化函数,给出了向量优化问题E-最优元的标量化刻画,建立了带变动序结构的向量优化问题的E-最优元的必要和充分最优性条件.     

基于排队论的通信系统中费用优化问题

采用带启动时间的N策略排队,对ATM通信网中虚通道连接中的费用问题进行了量化分析,给出使系统总费用最少的最优策略N*.     

Quantitative Stability Analysis of Two-Stage Stochastic Linear Programs with Full Random Recourse

Abstract

In this paper, we apply the parametric linear programing technique and pseudo metrics to study the quantitative stability of the two-stage stochastic linear programing problem with full random recourse. Under the simultaneous perturbation of the cost vector, coefficient matrix, and right-hand side vector, we first establish the locally Lipschitz continuity of the optimal value function and the boundedness of optimal solutions of parametric linear programs. On the basis of these results, we deduce the locally Lipschitz continuity and the upper bound estimation of the objective function of the two-stage stochastic linear programing problem with full random recourse. Then by adopting different pseudo metrics, we obtain the quantitative stability results of two-stage stochastic linear programs with full random recourse which improve the current results under the partial randomness in the second stage problem. Finally, we apply these stability results to the empirical approximation of the two-stage stochastic programing model, and the rate of convergence is presented.     

System of Vector Equilibrium Problems and Its Applications

In this paper, we introduce a system of vector equilibrium problems andprove the existence of a solution. As an application, we derive someexistence results for the system of vector variational inequalities. We alsoestablish some existence results for the system of vector optimizationproblems, which includes the Nash equilibrium problem as a special case.     

Generalized Vector Variational Inequalities over Countable Product of Sets

In this paper, we consider vector variational inequalities with set-valued mappings over countable product sets in a real Banach space setting. By employing concepts of relative pseudomonotonicity, we establish several existence results for generalized vector variational inequalities and for systems of generalized vector variational inequalities. These results strengthen previous existence results which were based on the usual monotonicity type assumptions     

Characterizations of Solutions for Vector Equilibrium Problems

In this paper, we characterize the solutions of vector equilibrium problems as well as dual vector equilibrium problems. We establish also vector optimization problem formulations of set-valued maps for vector equilibrium problems and dual vector equilibrium problems, which include vector variational inequality problems and vector complementarity problems. The set-valued maps involved in our formulations depend on the data of the vector equilibrium problems, but not on their solution sets. We prove also that the solution sets of our vector optimization problems of set-valued maps contain or coincide with the solution sets of the vector equilibrium problems.     

考虑意识对带媒介的SIS模型中疾病传播过程的影响

在无标度网络上,研究意识对带媒介的SIS模型中疾病传播过程的影响.最后的结果表明接触意识与局部意识能增加流行病阈值,而全局意识与媒介意识不能.     

对称集值向量拟均衡问题解集的稳定性

本文研究了对称集值向量拟均衡问题解集的稳定性.证明了在约束映射满足一定连续性与目标映射是锥-恰当拟凸的集值映射条件下,对称集值向量拟均衡问题的解集是稳定的,还证明了每个对称集值向量拟均衡问题的解集至少存在一个本质连通区.     

The global weak sharp minima with explicit exponents in polynomial vector optimization problems

In this paper we discuss the global weak sharp minima property for vector optimization problems with polynomial data. Exploiting the imposed polynomial structure together with tools of variational analysis and a quantitative version of ?ojasiewicz’s gradient inequality due to D’Acunto and Kurdyka, we establish the Hölder type global weak sharp minima with explicitly calculated exponents.     

On the index of finite determinacy of vector fields with resonances

In this paper we study normal forms for a class of germs of 1-resonant vector fields on R^n with mutually different eigenvalues which may admit extraneous resonance relations. We give an estimation on the index of finite determinacy from above as well as the essentially simplified polynomial normal forms for such vector fields. In the case that a vector field has a zero eigenvalue, the result leads to an interesting corollary, a linear dependence of the derivatives of the hyperbolic variables on the central variable.     

Existence of a Solution and Variational Principles for Vector Equilibrium Problems

In this paper, we prove an existence result for a solution to the vector equilibrium problems. Then, we establish variational principles, that is, vector optimization formulations of set-valued maps for vector equilibrium problems. A perturbation function