排序方式： 共有13条查询结果，搜索用时 296 毫秒
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简介了湖州台风服务系统的资料整编及查询检索过程，各模块的结构及原理和链接关系．提供了详细的检索方法，基于GPS（global positioning system）和GIS（geographical information systems）本系统以资料套用的方式将全国的台风资料与影响浙江和湖州市的台风资料有机地互相引用，达到资源共享的目的，既可以及时了解分析全国乃至西太平洋、南海台风的活动情况．以便及时掌握台风可能对浙江、湖州的侵害。又可在需要查询台风可能对湖州带来的灾害时，直接进行沏州台风模块的检索．进行历史资料路径、风雨、影响时间、危害程度的对比，因此本系统资料翔实、项目齐全、模块分类清晰、链接查询方便。 相似文献
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Finding all occurrences of a twig pattern is a core operation of extensible markup language （XML） query processing. Holistic twig join algorithms, which avoid a large number of intermediate results, represent the state-of-the-art algorithms. However, ordered XML twig join is mentioned rarely in the literature and previous algorithms developed in attempts to solve the problem of ordered twig pattern （OTP） matching have poor performance. In this paper, we first propose a novel children linked stacks encoding scheme to represent compactly the partial ordered twig join results. Based on this encoding scheme and extended Dewey, we design a novel holistic OTP matching algorithm, called OTJFast, which needs only to access the labels of the leaf query nodes. Furthermore, we propose a new algorithm, named OTJFaster, incorporating three effective optimization rules to avoid unnecessary computations. This works well on available indices （such as B~-tree）, skipping useless elements. Thus, not only is disk access reduced greatly, but also many unnecessary computations are avoided. Finally, our extensive experiments over both real and synthetic datasets indicate that our algorithms are superior to previous approaches. 相似文献
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In this paper the problem of indexing heterogeneous structured documents and of retrieving semi-structured documents is considered. We propose a flexible paradigm for both indexing such documents and formulating user queries specifying soft constraints on both documents structure and content. At the indexing level we propose a model that achieves flexibility by constructing personalised document representations based on users views of the documents. This is obtained by allowing users to specify their preferences on the documents sections that they estimate to bear the most interesting information, as well as to linguistically quantify the number of sections which determine the global potential interest of the documents. At the query language level, a flexible query language for expressing soft selection conditions on both the documents structure and content is proposed. 相似文献
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顾红标 《上海师范大学学报(哲学社会科学版)》2008,37(2):102-105
针对目前小学语文教学中,长期存在的不重视培养学生问题意识的现状进行分析,在此基础上,指出培养小学生问题意识的重要性。文章着重提出了可供具体操作的教学策略：融洽师生关系,使学生敢问;改变教学思想和教学策略,让学生想问;指导质疑方法,使学生会问。探究在教学的过程中,使学生发现有价值、有意义的问题,然后进行积极的思维,通过实践、努力,最终解决问题,从而激发学生的潜能,提高小学语文教学效率。 相似文献
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介绍了《西华师范大学宿舍管理系统》的系统概况和总体目标，对系统的总体结构进行了描述和说明，并着重就系统实现中的两个关键技术：基于PB的模糊查询、数据管道进行了较为详细的阐述。 相似文献
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陈家洪 《内江师范学院学报》2005,20(2):109-111
生物学教学中倡导自主性学习，重视体验性教学和强调质疑意识．培养学生的创新精神、创新能力和创新思维，从而提高学生的创新素质。 相似文献
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任学礼的"汉字生命符号"学说,认为汉字是生命的象意文字,源于生命,源于生殖崇拜.本文反对这种观点.本文主要从学科知识和思维方式的角度对任学礼的观点提出质疑. 相似文献
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黄春英 《长江工程职业技术学院学报》2004,21(4):13-15
疑问是打开知识大门的钥匙.在教学中,教师应根据启发性、针对性、层次性等原则,掌握好质疑设问的技巧,培养学生的学习兴趣,引导学生发现问题、思考问题、解决问题. 相似文献