基于随机性集合覆盖模型的伤病员后送运力预计及优化配置仿真模型设计

目的:设计仿真模型用于大批伤病员后送动力预计及配置优化。方法:分析了目前运力预计方法的不足,引入运筹学中的选址问题,选用应用随机性集合覆盖模型解决后送运力优化配置的理论模型,分析探讨了伤病员后送中的若干不确定因素,包括后送工具的可获得性、后送工具的容量及速度、有效工作时间。根据这些随机变量的特征,确定相应的理论概率分布。结果:按照蒙特卡罗仿真的原理,以随机性集合覆盖模型为基础,用随机数模拟上述不确定因素,形成后送运力优化配置的仿真模型。结论:本模型可作为今后开发计算机辅助软件的基础,并供各级卫勤机构参考。

海上伤病员后送加权平均运力的预计方法

卫生运力预计是战时卫勤组织指挥的重要内容之一。我军未来作战海上后送大批伤病员时 ,可能混合使用多种不同性能的后送工具。为此提出了加权平均运力的概念及预计方法 ,讨论了其局限性。本方法可供各级卫勤领导和机关参考。

Investigations on Several Mechanical Problems in Windblown Sand Movement

It is very necessary for investigation on mechanism of windblown sand movement to understand and find out effective measures of preventing and reducing windblown sand, This also deals with some general features and hot spots in the scientific forelands. such as multi-scale problems. interactions among. multi-physical-fields, randomness and nonlinearity as well as complex systems. In recent years, a series of experiments in wind tunnels and theoretical modeling as well as computer simulation have been taken by our research group （the Laboratory of Environmental Mechanics on Windblown Sand Movement in Lanzhou University ）in a cross-disciplinary （mechanics and geography） viewpoint. Several original and essential studies were explored such as the main regularities of charges on sand particles, the mechanisms of electric field in windblown sand flux, the effects induced by the electric field on the flux, the microwave propagations, the evolution process of windblown and flux under mutual couple interations among several physical fields, and the simulation of the main features of Aeolian sand ripples.