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铁路专业设计院在长期铁路建设项目设计中积累了丰富的铁路设计案例。为弥补既有设计案例信息化管理平台的不足,解决大量资源在新建线路设计和员工技能提升方面没有发挥应有价值的情况,基于B/S架构进行铁路勘察设计案例信息化管理系统的设计与实现,介绍了系统的总体架构和具体功能实现。该系统能够较为全面地对铁路勘察设计资料进行统一收集管理,实现既有设计资料的快速查询和分析利用。便于专业设计人员快速学习、参考、利用既有案例资料和技术专家的知识经验。 相似文献
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红黏土抗剪强度与影响因子作用机理分析 总被引:1,自引:1,他引:0
结合武广客运专线红粘土直剪实验结果,按照固结快剪、快剪和慢剪3种实验条件,分别计算红黏土粘聚力、摩擦角、含水率以及液塑限等常规物理指标之间的Pearson相关系数和显著性概率,对显著影响因子的作用机理进行分析.通过分析得到了不同剪切条件下红黏土粘聚力和摩擦角的主要影响指标及其作用机理、粘聚力随液性指数的变化规律以及抗剪强度的统计结果. 相似文献
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In current cloud computing system, large amounts of sensitive data are shared to other cloud users. To keep these data confidentiality, data owners should encrypt their data before outsourcing. We choose proxy reencryption (PRE) as the cloud data encryption technique. In a PRE system, a semi-trusted proxy can transform a ciphertext under one public key into a ciphertext of the same message under another public key, but the proxy cannot gain any information about the message. In this paper, we propose a certificateless PRE (CL-PRE) scheme without pairings. The security of the proposed scheme can be proved to be equivalent to the computational Dire- Hellman (CDH) problem in the random oracle model. Compared with other existing CL-PRE schemes, our scheme requires less computation cost and is significantly more efficient. The new scheme does not need the public key certificates to guarantee validity of public keys and solves the key escrow problem in identity-based public key cryptography. 相似文献