排序方式: 共有46条查询结果,搜索用时 15 毫秒
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舷侧充气气囊装置设计 总被引:1,自引:0,他引:1
以三峡库区50客位客渡船为例进行舷侧充气气囊装置技术方案设计,通过对3种气囊尺度的比较计算,探索气囊尺度对客渡船性能的影响规律,寻求最佳气囊装置技术设计方案. 相似文献
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探讨了如何有效增强新农合与医院网络之间数据交换的安全性,提升信息系统的服务能力。建立一套由新农合管理和控制的安全防护机制,通过五控两防两隔离,全面掌握信息控制权。采用"网闸+网关+终端安全系统"的解决方案,实现新农合网络与医院内部网络与间的网络隔离断开与数据的摆渡交换。通过新农合与医院网络数据交换的安全防护方案的实施,可以有效降低网络安全风险,进一步提升新农合和医院信息系统的服务水平。 相似文献
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水库建设将影响淹没区内文物古迹的保存,岩土体文物具有本体和赋存载体不可分割的整体性特征,在水库淹没较深的情况下,无法进行整体搬迁或就地保护展示,因此"原址覆盖保护、异地模拟展示"便成为保留文物信息和价值的首选方法,其中选址即为最重要的环节之一。以乌东德水库淹没区的皎平渡渡口山洞遗址为例,在详细调查山洞遗址文物和拟选场地信息的基础上,采用层次分析法,建立以最优选址为目标层、6个指标为准则层、14个指标为子准则层、5处选址为方案层的层次结构,逐层逐个指标构建判断矩阵,通过计算和检验最终确定1号场址为最佳模拟展示场址。分析同时证明,层次分析法是一种可实现综合兼顾各种定量与定性因素的决策方法,适用于水库淹没区文物异地模拟展示及迁移复建选址方案的决策评价。 相似文献
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Isolation and characterization of bacteria from engine sludge generated from biodiesel-diesel blends
Fuel filter clogging is often a major concern of biodiesel application. Excessive sludge formed from a biodiesel-diesel fuel blend in the fuel system of marine ferries was investigated in this study to determine the sources of the sludge. Microbes were found as the major cause of sludge and the isolates were further investigated. Three types of predominant growing bacteria were isolated. These isolates were identified as Klebsiellaoxytoca, Klebsiellanov. sp., and Staphylococcusepidermidis based on morphological, biochemical, physiological and molecular evidences. All three microbes can grow vigorously in temperatures between 28 and 37 °C, with Klebsiellaoxytoca and Klebsiella nov. sp. growing at temperatures as low as 20 °C. Klebsiellaoxytoca produced significant amounts of exopolysaccharides as indicated by polyacrylamide gel electrophoresis (PAGE). Ion chromatography measurement showed that the exopolysaccharides consisted of galactose, glucose, and xylose. In a simulated biodiesel-diesel blend (5% of biodiesel in diesel) - tap water system, Klebsiellaoxytoca showed obvious growth and formed extra sludge while the other two isolates did not. The results confirmed that microbial activities in the fuel system of marine ferries are one of the major causes of excessive sludge (solid waste) formation, leading to filter clogging. This is the first report on the activities of Klebsiella and Staphylococcus in the usage of biodiesel, diesel, or their blends. The results lead to a solution to ensure clogging-free fuel system when using biodiesel-diesel blends in marine environments by applying proper biocides. 相似文献
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为提高DTN网络性能,针对摆渡路由算法中摆渡节点存储资源分配存在的公平性问题,提出了一种基于加权最大最小公平原则的摆渡节点存储资源的优化分配方案。区别于现有摆渡节点存储资源分配所使用的先来先服务方式,加权最大最小公平原则可以在保证数据节点在获得公平的数据传输机会的同时,为重点任务提供更多的资源支持。仿真实验表明,经过存储资源优化的摆渡路由算法与现有摆渡路由算法相比较,在网路传输成功率、平均网络时延等方面性能均有显著提高。 相似文献
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针对传统摆渡路由中使者调度和协作的问题,设计一种交叉区域的多使者摆渡路由协议.将网络划分成若干横向区域和纵向区域,每个区域内存在一个使者轮询节点.通过单个使者或一个横向区域使者与一个纵向区域使者的协作实现数据的传递.从理论上分析了提出协议的期望延时,并从延时和容错性两个方面对协议进行了改善.仿真评估结果表明,交叉区域摆渡路由在平衡网络负载和端到端的延时的同时,具有单一使者的容错能力,是一种合理有效的多使者调度方法. 相似文献
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