Automatic software install/update for embedded Linux

Linux has a special feature of automount in the Linux kernel. Filesystem can be mounted and unmounted automatically. Its performance is similar to MS Windows. It works well under demands of more saving resources and automatization, like memory of system. An approach to install/update software automatically on embedded platform was proposed. This approach derives from above feature based on embedded environment with Linux OS. Configurations of files related to this feature were introduced. An example in practice was given to realize this approach from universal serial bus （USB） memory disk when USB disk is available.     

铁路危险货物运输电子化资质审批管理系统的设计与实现

加强铁路危险货物运输源头信息化卡控,对于铁路危险货物运输管理具有重要意义。铁路危险货物运输电子化资质审批管理系统具有电子化资质审批、制作集成指纹信息的资质审批卡、电子化受理审核及运单打印等功能。本系统作为铁路危险货物运输源头卡控的强有力手段,已实际投入使用,系统运行稳定,达到设计要求。     

最优投资组合差异系数σ/μ的性质与确定方法

首先分析研究了Markowitz均值-方差模型在一般条件下即允许卖空条件下的差异系数的存在性、唯一性和最优值的解法，在此基础上分析证明了更具实际意义的在非卖空条件下该模型的差异系数最优值的存在性和唯一性，给出了差异系数的数学表达式，并提供了一种解法及其实现的具体方法步骤，最后依据此方法对实例进行了分析验算．