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1.
针对炮兵阵地配置的特殊要求,将模糊数学中的隶属度概念引入到炮兵阵地聚类算法之中,具有较强的可操作性,利于计算机实现,对炮兵指挥决策有一定的参考价值.  相似文献   

2.
在研灾Banach空间常微分方程Cauchy 问题解的存在性问题时,人们常常使用一个 很难验证且一般情况下难以达到的条件──一致连续性条件,本文完全不使用一致连续性条 件,仅利用紧型条件,获得了Banach空间Cauchy问题解的存在性定理,从而改进和推广了已 知的有关结果,  相似文献   

3.
In this paper, we study the growth of solutions of a first-order linear differential equation and that of a second-order linear differential equation. From this we obtain some uniqueness theorems of a nonconstant entire function and its first derivative having the same fixed points with the same multiplicities. The results in this paper also improve some known results. Some examples show that the results in this paper are best possible.  相似文献   

4.
A conventional problem of paper handling in a page-printing printer is to design a reliable paper path. Sometimes, this also affects the printing quality. The nonlinear theory of elastica has often been used to model paper deflection shape and to predict the paper path between some guiding rollers. The present paper proposes another method that can solve this problem more efficiently. Considering a piece of paper as a nonlinear beam, finite element analysis with geometric nonlinearity and manipulating the contact gap element between paper and guiding surfaces can be used to simulate the large-deflection behavior of paper. In this paper, the paper path in the vicinity of an OPC (organic photoconductive) drum is investigated with a general purpose finite element package. The effect of the electrostatic force between the OPC drum and the paper is considered, and the deformed shape of the paper for different forces lengths is obtained. According to those results an appropriate paper guide is added for an exact paper path.  相似文献   

5.
In this paper, we prove a theorem on the growth of a solution of a linear differential equation. From this we obtain some uniqueness theorems concerning that a nonconstant entire function and its derivatives sharing a small entire function. The results in this paper improve many known results. Some examples are provided to show that the results in this paper are the best possible.  相似文献   

6.
污染环境中三维竞争系统的生存阈值   总被引:4,自引:0,他引:4  
本文用积分均值法,首次讨论了带有毒素影响的三维竞争系统的Lotka-Volterra模型,得到了各种群平均持续生存与绝灭的阈值.文中所得结论对环境污染以及生物种群影响的理论研究和实际应用有重要意义.文[5,6]的主要结论包含在本文的结果中.  相似文献   

7.
本文在平行数据模型方差成分的框架下,考虑了横截面内误差项Uit~ARCH(q)的异方差处理方法.给出模型设定的假设检验和参数的一致估计,并利用Monte-Carlo方法验证了本文估计方法优于普通最小二乘估计方法.  相似文献   

8.
考虑成本因素的税企博弈模型   总被引:2,自引:0,他引:2  
本在献[1]的基础上,进一步考虑成本因素在更为一般的条件下建立了新的税企博弈模型,得到国家税务机关最优混合策略及其骗税罚款系数公式,并且指出献[1]的结论是本的一个推论。  相似文献   

9.
试卷质量的灰色综合评判   总被引:3,自引:0,他引:3  
李文革.试卷质量的灰色综合评判.数理统计与管理,1997,16(4),42~45.本文运用灰色综合评判评价了文[1]中的七套试卷,得到了与文[1]不同的结果,但本文的结果更符合客观实际。  相似文献   

10.
本文在平行数据模型方差成分的框架下,考虑了横截面内误差项v_(it)~ARCH(q)的异方差处理方法。给出模型设定的假设检验和参数的一致估计,并利用Monte-Carlo方法验证了本文估计方法优于普通最小二乘估计方法。  相似文献   

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