具反馈控制和Holling Ⅳ功能性反应捕食非自治系统的持久性和全局稳定性

目的研究一类具反馈控制和HollingⅣ功能性反应捕食非自治系统。方法通过应用微分方程比较原理和构造适当的Lyapunov泛函进行研究。结果得到保证该系统解的持久性和全局稳定性的充分条件。结论与具反馈控制和HollingⅡ功能性反应捕食系统相比,当功能性反应函数非单调增加时,该系统仍可保持其持久性和全局稳定性。     

群决策中两类偏好信息——AHP判断矩阵和模糊偏好关系矩阵的一致化方法

在有限方案的群决策问题中，如何统一具有不同形式的偏好信息是一个新的研究课题。本文针对群决策中决策者给出着于方案的两类偏好信息－AHP判断矩阵和模糊偏好关系矩阵，通过构造转换函数，给出关于这两类偏好信息的一致化方法，这为研究群决策中不同形式偏好信息的集成方法和方案排序打下了坚实的基础，最后给出一个算例。     

ON EVALUATING THE RUN LENGTH PROPERTIES OF X^— CHARTS WITH ESTIMATED CONTROL LIM

X＾－ charts with estimated coutrol limits are commonly used in practice and treated as if the in-control process parameters were known.However,the former can behave quite differently from the latter.To understand the differences,it is necessary to study the run length distribution(RLD),its mean(ARL)and standard deviation(SDRL) of the X^- charts when the control limits are estimated.However,ARL and SDRL are integrals over and infinite region with a boundless integrand,the finiteness has not been proved in literature.In this paper,we show the finiteness and uniform integrability of ARL and SDRL.Furthermore,we numerically evaluate the ARL,SDRL and the RLD using number theory method.A numerical study is conducted to assess the performance of the proposed method and the results are compared with those given by Quesenberry and Chen.     

UNIFORM PERSISTENCE AND GLOBAL ATTRACTIVITY FOR NONAUTONOMOUS COMPETITIVE SYSTEMS WITH DISPERSION

In this paper, we consider a nonautonomous competitive model with dispersion and a finite number of discrete delays. The system, which consists of two Lotka-Volterra patches, has two competitors: one can disperse between the two patches, but the other is confined to one patch and cannot disperse. Our purpose is to demonstrate that the dispersion rates have no effect on the uniform persistence of the solutions of the system. Furthermore, we establish the conditions under which the system admits a positive periodic solution which attracts all solutions.     

广义的Bernstein-Bézier多项式的收敛性的新证明

本文对“广义的Bernstein-Bezier多项式的收敛性”采用了一种新颍、简洁的证明方法。     

泛函微分方程的一致浙近稳定性

本文用lyapunov第二方法研究泛函微分方程零解的稳定性，得到了一些以文[3-8]中的相关结果为其推论的判别条件。     

男性奴役下的女性——《诗经》中被弃妇女的哭诉

恩格斯指出：“最初的阶级压迫是跟男性对女性的奴役相一致的。”(《马克思恩格斯选》两卷集，第二卷第223页)当人类社会步入明社会之后，最初的自由感很快就被伴随而来的阶级压迫、性别差异所取代，妇女的社会地位一落千丈，就象从五彩云端跌入了万丈深渊。     

关于多元Gauss—Weierstrass算子的一致逼近

本文利用一类 K—泛函和光滑模的等价性给出了二元 Gauss—weierstrass 算子在一致逼近意义的正定理、逆空理和特征性。