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Abstract: The paper introuduces the methods of making drawing of double channel impeller in classical works, points out some problems in the drawing and gives out a correct method of making drawing after combine atual situation.
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文摘:简述了现有文献中双流道叶轮的叶片绘型方法，指出文献中绘型存在的问题，并结合设计实例给出了正确的绘型方法。 |
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Abstract: The paper involves main aspects of Russian steel tube industry, including recent general production situation, activities by major steel tube makers in technical updating and new product development to sharpen their competitive edges, steel tube
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文摘:介绍了俄罗斯钢管生产近期概况，主要钢管企业在提高市场竞争力方面进行的技术改造和新产品开发的一些动态，俄罗斯钢管进出口情况和复苏俄罗斯钢管生产的应对措施。 |
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Abstract: The paper made a discussion of the implication,features,and developmental trend of modern agriculture as well as several problems of the construction of ecological agriculture.The research indicated that relied upon ecological civilization,moder
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文摘:论述了我国现代农业的内涵、特征和发展趋势，讨论了生态农业规划和建设的关键性问题，指出现代农业应以生态文明为基础，以产业化、生态化和市场化为主导，以提高农业经营者的科技和生态环境意识为中心，在合理规划的基础上，注重效益型、生态农业建设。 |
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Abstract: The paper mainly analyses how to strengthen the financial management for rear service socialization in colleges.
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摘要:文章主要分析高校后勤向社会化转变过程中如何做好财务管理工作。 |
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Abstract: The paper mainly describes the best choice of there-dimensional seismic layout with respect to the main facts that affect there-dimensional seismic data acquisition.
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文摘:本文从影响三维地震数据采集的各主要因素出发分别论述了采集系统的最佳选择问题. |
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Abstract: The paper mainly introduces how to optimize the existed filtration method with statistics normal distribution and quadrature optimization,which make the optimized filtration method economic 、 time saving and effective.
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摘要：主要介绍了如何利用正态分布和正态优化对现有的筛选方法进行优化，从而使优化后的筛选方法在达到预期筛选目的的情况下做到最经济，省时和有效。 |
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Abstract: The paper mainly introduces the application that the high voltage inverter in the oil field pump and joint electricity effect is clear, and possesses application and dissemination value.
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摘要：本文叙述了高压变频器在油田注水泵上的应用，节电效果明显，具有推广应用价值。 |
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Abstract: The paper presents a experimental study on thermal conductivity of frost formation through sublimation of water vapor.The experinmentals shows the results in reference ［4］ is curect.
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文摘:实验研究水蒸汽凝华结霜过程中在冷壁面上形成的霜层的导热系数，并以此验证作者曾提出的霜层导热系数的理论结果. |
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Abstract: The paper presents a method of improving machining accuracy in electrochemical machining by using a dual pole tool.
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文摘:采用辅助阳极法来改善电解孔加工过程中侧面间隙电场的分布。 |
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Abstract: The paper presents distribution of nepheline syenites and theirtectonic settings, rock assembladges, mineral associations and geochemisical characteristics, discusses the relationship between the minerological characteristics of main minerals an
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文摘:介绍了中国霞石正长岩的分布、产出的大地构造环境、岩体的岩石组合、岩石的地球化学和造岩矿物组合特征。 |
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Abstract: The paper presents the design of a servo driver which can control different kinds of motors.This kind of driver uses advanced 16 bits CPU 80C196KC as its control kernel.It can control induced motor、synchronous motor or two DC servo motors.It can
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文摘:本文设计一种可工作于多种控制模式下的伺服驱动器，这控制器以高档16位单片机80C196KC为控制核心，可控制感应电动机、同步电动机及两台直流伺服电动机，它利用同样的硬件平台通过对软件的设置而选择不同的运行模式。 |
