云主机可信技术研究

本文研究云主机可信技术主要关注云计算环境下云主机全生命周期的可信。随着云计算的普及,越来越多业务从传统的物理服务器迁移到云主机之上,云主机为业务提供了弹性的计算资源但同时为业务的可信带来了新挑战。面对新的云主机可信挑战,本文对云主机全生命周期内的可信进行研究,包括云计算服务可信、云主机镜像可信、云主机创建可信、云主机启动可信、云主机迁移可信、云主机销毁可信等,该研究对于云计算环境下的云主机的可信具有一定的指导意义和应用价值。     

量子密码技术现状及云安全应用展望

随着量子通信技术的快速发展，以量子密钥分发为核心的量子密码体系日趋成熟，量子密码技术因其安全优势已成为信息安全领域研究的重点方向。本文研究了量子密码技术的发展现状，针对量子密码技术在云计算安全中的应用进行了展望，提出了量子云密码体系、分布式量子安全云、基于量子密钥的云安全控制三个应用思路，对构建基于量子密码技术的新型云安全体系具有积极指导意义。     

A computational method for post-construction settlement of high-speed railway bridge pile foundation considering soil creep effect

Based on reasonable assumptions that simplified the calculational model,a simple and practical method was proposed to calculate the post-construction settlement of high-speed railway bridge pile foundation by using the Mesri creep model to describe the soil characteristics and the Mindlin-Geddes method considering pile diameter to calculate the vertical additional stress of pile bottom.A program named CPPS was designed for this method to calculate the post-construction settlement of a high-speed railway bridge pile foundation.The result indicates that the post-construction settlement in 100 years meets the requirements of the engineering specifications,and in the first two decades,the post-construction settlement is about 80% of its total settlement,while the settlement in the rest eighty years tends to be stable.Compared with the measured settlement after laying railway tracks,the calculational result is closed to that of the measured,and the results are conservative with a high computational accuracy.It is noted that the method can be used to calculate the post-construction settlement for the preliminary design of high-speed railway bridge pile foundation.     

小尖山隧道弃碴场稳定性分析

以小尖山隧道弃碴场为例,结合勘察资料,选取典型剖面,从场址稳定性、弃碴体整体及局部稳定性三方面进行稳定性分析。结果揭示,该弃碴场天然状态下稳定性较好,暴雨状态下局部边坡可能失稳。