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对于第二积分中值定理中的“中间点”的渐进性问题,将区间的端点推广到区间中的任意点,给出并证明了更一般的结论,改进和推广了现有的相关结论. 相似文献
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建于上世纪六、七十年代的公路桥梁,现在大多带病服务于现代交通运输中,因此,对这些桥梁进行病害检查及分析就显得十分重要。 相似文献
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简要介绍了旧路加宽涵洞的开发内容,并以盖板涵为例对加宽涵洞的勘察设计过程、设计的主要内容、施工方法和注意事项等加以介绍. 相似文献
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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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在分析333TEU集装箱船的双壳舷侧结构耐撞性能的基础上,结合钢-泡沫结构自身的冲击性能,将钢-泡沫结构替代舷侧外板结构,得到新的舷侧耐撞结构形式。利用MSC.Dytran数值仿真软件,对双壳舷侧结构的耐撞性能进行综合分析。 相似文献