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The paper researches data property, principle standard and step of spatial database and discusses framework management of spatial database and analyses key technology that are seamless integration of spatial database, metadata structure, spatial database
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摘要采用空间数据库的基本理论，结合北京市国土资源与房屋管理信息系统中建库的实例，研究了空间数据建库的数据性质，空间数据建库的原则、标准和步骤；探讨了空间数据库的组织管理；分析了空间数据建库数据的无缝集成、元数据的组织、空间数据库增量备份和增量更新等关键技术。 |
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The paper researches rectangle, parabola, sinusoid and triangle acceleration curves and their response characteristics, and puts forward a concept of combined acceleration.
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摘要研究了输送机的各种加速度（矩形、抛物线形、正弦形和三角形）曲线及其响应特性，在此基础上，提出了组合加速度的概念，并对其进行了研究。 |
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The paper reveals the superiority and effectiveness of the method for the economical operation of those transformers in rural electric network and urban districts, by which the loss of transformer is decreased and the energy source is economized.
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摘要为在农村电网和城市小区实施配电变压器经济运行，提出一种新的配电变压器经济运行算法，使变压器达到降低损耗，节约能源和经济运行的目的。 |
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The paper reviewed the connections and relations between the control economic policy of Republic Government aid state-owner capital, the expanding of state-owner enterprise and Its status aid role during wartime from the timing oldie control economy, the
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本文从战时经济统制政策形成，国家资本体系的确立，以及经济统制政策与国家资本企业的互动三个方面，考察经济统制政策与国家资本企业的关系，以及经济统制政策下国家资本企业的发展及其地位和作用。 |
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The paper reviewed traits and genetic rules of cotton against verticillium wilt in general, depicted the three approaches which exists in cotton defending against verticillium wilt through reinforcing physical structure, producing plant phytoalexin, inter
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摘要本文概述了棉花抗黄萎病的特点与规律，指出棉花植株是通过自身组织结构的强化、植物抗毒素的合成以及微生物之间的互作三方面应对黄萎病菌的侵染。 |
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The paper reviews home and overseas research works on exhumation and use of nitrogen-fixing resource, genetics engineering of nitrogen fixation, and biochemistry of nitrogenase and chemical modeling of biological nitrogen fixation, and describe the prospe
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本文从固氮资源的发掘和利用、固氮的遗传工程以及固氮酶生物化学和化学模拟生物固氮三方面对国内外的研究进展进行了全面的阐述，并对生物固氮研究的前景进行了展望。 |
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The paper reviews the concept, characteristics of food nanotechnology. At the same time, it summarizes its recent research and application on food nutrients.
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摘要文章介绍了纳米技术的概念、特性，并对其在食品科学中的最新研究与应用进行了综述。 |
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The paper reviews the developments and the new trends of the monolithic stationary phase on ion chromatography, including the advantages and the classification of monoliths, as well as their applications for the separation and analysis of ionic molecules.
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本文就离子色谱领域整体固定相的发展以及最新的研究动向进行了综述，讨论了离子色谱整体固定相的优点、分类以及在分离分析离子态物质方面的应用等。 |
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The paper reviews the history and trend of methods of credit risk measurement in the last 20 years, and enumerates the most important literatures. It helps study deeply in the field.
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摘要本文回顾了信用风险测量方法在过去20多年里创新、应用和发展的历史，其中列举了大量当时最重要的文献，并在此基础上分析了未来该领域的发展和研究方向，为进一步在该领域深入研究提供一些帮助。 |
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The paper reviews the major features and inadequacies of the monograph and regards the work as a tour de force that makes good omissions and deficiencies and brings forth new ideas.
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文章对该书的主要特色和不足之处作了评述，认为这是一部拾遗补缺、开拓创新的精品力作。 |
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The paper reviews the recent progress in [3+2] cycloaddition using azomethine ylide, including preparation of ylide, mechanism and selectivity of reaction, and application in the total synthesis of natural products.
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摘要综述了亚甲胺叶立德的制备、它参与的[3+2]环加成反应的反应机理、反应选择性及在天然产物全合成中的应用等方面的最新进展。 |
