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旧桥桩基础的茶载试验是桥梁工程检测的一重要内容,也是评估旧桥承载力的重要依据。通过对上海武宁路桥桩基础的荷载试验,分析讨论了旧桥的桩基承载力,为该桥的改扩建提供了科学依据。  相似文献   
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针对上海复兴东路隧道工程浦东工作井和暗埋段深基坑的特征,提出了基坑开挖同步监测设计方案,信息化施工效果分析表明,该监测方案是可行的。通过监测信息反馈,及时进行施工工序和施工参数调整,取得了较好的经济效益和社会效益。  相似文献   
3.
With the rapid increase of educational resources, how to search for necessary educational resource quickly is one of most important issues. Educational resources have the characters of distribution and heterogeneity, which are the same as the characters of Grid resources. Therefore, the technology of Grid resources search was adopted to implement the educational resources search. Motivated by the insufficiency of currently resources search methods based on metadata, a method of extracting semantic relations between words constituting metadata is proposed. We mainly focus on acquiring synonymy, hyponymy, hypernymy and parataxis relations. In our schema, we extract texts related to metadata that will be expanded from text spatial through text extraction templates. Next, metadata will be obtained through metadata extraction templates. Finally, we compute semantic similarity to eliminate false relations and construct a semantic expansion knowledge base. The proposed method in this paper has been applied on the education grid.  相似文献   
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近几年来,随着越南出口货运量不断增长,世界各大知名集装箱航运公司加大挂靠越南盖梅港运力投入,进出越南盖梅港的集装箱船趋于大型化。由于受该港所处特殊地理环境影响,大型集装箱船舶安全进出风险倍增。本文汇总该港资料及多次安全进出的体会,对越南盖梅港及TCIT码头作了简要介绍,为同行提供参考。  相似文献   
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本针对目前国内外CAD系统存在的算法效率低、稳定性差、不便于移植、二次开范围不及集成化程度低等问题,结合中国国情,开发出一套既具有国际先进水平又能不能扩展完善的具有自主版权的CAD系统,使CIMS及虚拟制造技术真正实用化。  相似文献   
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Theconceptofwirelessnetworkwasintro ducedaround 1 980 [1,2 ] ,IEEE 80 2 .1 1forWirelessLocalAreaNetwork (WLAN )was publishedinJune 1 997[3] .Nowavarietyofwirelesstechnolo giesandproductshavebeendeveloped ,theyarebe comingtheviablecomplementarysolutionstowirednetworks[1] ,suchasLANextension ,inter LANbridges,ad hocnetworking ,nomadicaccess,etc..Moreover,wirelessalsoproducesavarietyofnewapplications,suchasmobileeducation ,computing ,bankingandsoon .Anewmobilecommerceisforthcoming .Thebig…  相似文献   
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Aiming at issues on multimedia communication in synchronous real-time teleteaching (SRT) systems over IP network, a 4-tuple structural mode of multimedia communication is proposed in the paper, and an SRT-oriented distributed MCU model is built according to the mode. Moreover, the mechanism of multicast communication across subnets is discussed. The distributed MCU model has been applied successfully in our interactive synchronous real-time telesteaching system RealClass and has shown good extendibility in operation.  相似文献   
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针对目前国内外减速顶测系统中存在的效率低、使用复杂、功能无法扩展以及自动化程度低等问题,提出并开发出一种新型、高效方便、多功能的减速顶微机测试系统,对系统的测试原理及关键问题进行了详细介绍,该测试原理完全可应用到其它测试领域。  相似文献   
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