A Fuzzy Cluster and Retinex Theory-based Variation Model for Inhomogenous Image Segmentation

A variational inhomogeneous image segmentation model based on fuzzy membership functions and Retinex theory is proposed by introducing the fuzzy membership function.The existence of the solution of the proposed model is proved theoretically.A valid algorithm is designed to make numerical solution of the model under the framework of alternating minimization.The last experimental results show that the model can make segmentation of the real image with intensity inhomogeneity effectively.     

Buckling analysis of embedded graphene oxide powder-reinforced nanocomposite shells

In this study, the buckling analysis of a Graphene oxide powder reinforced (GOPR) nanocomposite shell is investigated. The effective material properties of the nanocomposite are estimated through Halpin-Tsai micromechanical scheme. Three distribution types of GOPs are considered, namely uniform, X and O. Also, a first-order shear deformation shell theory is incorporated with the principle of virtual work to derive the governing differential equations of the problem. The governing equations are solved via Galerkin's method, which is a powerful analytical method for static and dynamic problems. Comparison study is performed to verify the present formulation with those of previous data. New results for the buckling load of GOPR nanocomposite shells are presented regarding for different values of circumfer-ential wave number. Besides, the influences of weight fraction of nanofillers, length and radius to thickness ratios and elastic foundation on the critical buckling loads of GOP-reinforced nanocomposite shells are explored.     

Size dependent free vibration analysis of functionally graded piezoelectric micro/nano shell based on modified couple stress theory with considering thickness stretching effect

Higher-order shear and normal deformation theory is used in this paper to account thickness stretching effect for free vibration analysis of the cylindrical micro/nano shell subjected to an applied voltage and uniform temperature rising. Size dependency is included in governing equations based on the modified couple stress theory. Hamilton's principle is used to derive governing equations of the cylindrical micro/nano shell. Solution procedure is developed using Navier technique for simply-supported boundary conditions. The numerical results are presented to investigate the effect of significant parameters such as some dimensionless geometric parameters, material properties, applied voltages and temperature rising on the free vibration responses.     

基于模糊综合评判的舰艇电子战系统效能评估

舰艇电子战能力是现代舰艇综合作战能力的重要组成部分,为了准确评估舰艇电子战系统的效能,探讨现代战争条件下舰艇电子战系统的定量评估方法非常重要。应用模糊数学理论和层次分析法对舰艇电子战系统的效能进行评估,建立舰艇电子战系统的评价指标体系和三级评估模型,对定量指标和定性指标的隶属度计算进行了区分,并通过实例演示了该模型的具体应用过程。实例结果显示此方法是非常有效的,为这方面的进一步研究具有一定的借鉴意义。     

排队论在导弹防御体系射击效能中的应用

针对当前空袭手段多样化、综合化和一体化的特点,运用排队论方法,设计了一种基于排队论的射击效能评估模型。该模型综合考虑了各种因素对舰空导弹射击效能的影响,当编队的配置(如防御层数、通道数量)有所变化时,依然可以灵活运用上述模型对编队射击效能做出准确评估。     

过程方法在防化科研质量管理系统中的应用

介绍了根据国军标要求建立的科研质量管理系统．运用“过程方法”,对现行科研体制下的科研进程进行了识别,并提出了具体的控制要求。     

现代机载探测系统多源信息融合算法

针对机载探测系统的特性,应用Dempster-Shafer(D-S)证据理论和主观Bayes的组合算法,对来自机载SAR雷达、机载前视红外搜索跟踪系统(IRS)、电子支援系统(ESM)等探测系统多次观测所获得的数据,以及来自地面的电子情报(ELINT)的不同信息进行实时融合、识别,进而确定攻击对象.通过实例进行仿真证明,这种组合算法适用于不同类传感器和不同格式信息间的融合,适合于复杂信号环境.     

武器系统效能评估数学模型描述

在武器系统效能评估中,武器系统的战技指标是评估武器系统效能的重要因素.对武器系统的可靠性和维修性进行了研究,并应用于可用性矩阵计算中.利用随机过程理论,建立了武器系统可信性矩阵和武器系统效能能力指数模型,最后建立了武器系统效能评估模型.     

军警体育教学中认知结构与动作技能的形成

军警动作技能是军警部队官兵所必备的素质之一,也是其具备野外作战能力的基础。但是,有些身体素质良好的军警人员,掌握和发挥动作技能的水平却很低。在教学中要从全新的角度对军警人员获得动作技能的过程进行认知分析,以促进认知结构与动作技能的形成。     

新型驱护舰编队舰空导弹防御体系射击效能研究

针对新型驱护舰编队舰空导弹防御体系射击效能评估这一难题,对其射击效能准则进行了确立,提出了基于排队论的射击效能评估模型,对体系射击效能进行仿真计算,总结出能对系统射击效能做出准确评估的方法,并利用实例对模型进行了验证。