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Abstract: The development situation of pump hydraulic design CAD software is introduced, and the characteristics of PCAD2000 are detailed.
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文摘:简要分析了国内泵水力设计CAD软件的发展现状。 |
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Abstract: The development, structure performance and new te chnology application of such large-scale open pit loading equipment as elect ric shovel, hydraulic excavator and wheel loader were described.
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文摘:论述了露天矿大型装载设备电铲、液压挖掘机和轮式装载机的发展概况、结构性能及新技术的应用。 |
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Abstract: The development,application research and importance status in technology and economy of precious metal catalyst were described in present paper.And the development of new type catalysts was also discussed.
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文摘:叙述贵金属催化剂在技术经济领域中的重要地位及其应用研究发展态势，并讨论开发新型催化剂的技术方向。 |
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Abstract: The diferrences in cell growth, composition and levels of anthocyanins and catechins, activity of phenylalanine ammonia-lyase and dynamics of production between anthocyanin accumulating and non-accumulating subclones of tea cultured cells were e
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文摘:从细胞生长、色素和儿茶素次生产物组成与含量、苯丙氨酸解氨酶活性以及产物合成动态分析几方面，研究比较了积累色素与不积累色素的两类茶树培养细胞系之间的差异。 |
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Abstract: The differences between loess and sand in liquefaction mechanism,models of pore water pressure generation, coefficients of volumetric compressibility and permeability coefficients are preliminarily analyzed to realize the characteristics, the ra
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文摘:初步分析了黄土与砂土在液化机理、孔压增长模型、体积压缩系数以及渗透系数方面的差异以便认识黄土液化具有的孔压增长快、消散慢和沉降大的特性。 |
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Abstract: The digital PID control equation in microcomputer-based control systems is introduced.The effects of the technologies of digital smooth filtering，first order recurrence filtering and dynamic compensation for improving the control features and en
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文摘:介绍了微机控制系统中的数字PID控制算式，重点分析了数字平滑滤波、一阶递推滤波和动态补偿技术在改善控制性能、提高控制精度中的作用，给出了仿真实验的结果图。 |
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Abstract: The discrete element method (DEM) model of two-level isolation system impacted by external force is developed.
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文摘:提出了外力冲击的二级隔离系统的DEM模型。 |
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Abstract: The durability problem of electronic equipment, the relationship among reliability , maintainability and supportability, and the character of electronic equipment are discussed.
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摘要：主要讨论了有关电子设备的耐久性问题和耐久性与可靠性、维修性、保障性的关系以及耐久性的特点。 |
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Abstract: The e-business is developing rapidly, and the current tax base has been harmed. How to solve the taxation of e-business in our country has become more and more highlighted.
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论文摘要：电子商务飞速发展，现行税基受到侵蚀，如何解决我国电子商务的税收问题已经日臻突出。 |
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Abstract: The ecological benefits on various bunds planted with vegetation were studied using fuzzy comparison analysis method，the results showed that the bunds of Amorpha fruiticosa，biomass，Caragana korshinskii are relatively good，especially the bund of
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文摘:通过对几种生物埂生态效益的模糊对比分析结果表明，紫穗槐、黄花菜、柠条埂的生态效益相对较好，尤其是紫穗槐埂为最优，而海棠埂则稍差一些。 |
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Abstract: The effect and principle of health food therapy are introduced.The therapy is helpflul for the prevntion of occupationa poisoning.
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文摘:简述了职业人群保健膳食方法的原理、功效及制订原则，该膳食方法对预防职业中毒有辅助作用。 |
