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Abstract: In this paper,the efficient stress method is used as main means,while the Railway Engineering Anti-Earthquake Design Specification and the dynamic triaxial test are used as additional means.The authors analyze the ground layer liquefaction of sh
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文摘:以有效应力原理的有限元计算分析为主、铁路工程抗震设计规范及室内动三轴实验为辅，对修建在粉土或粉细砂层中的盾构隧道进行了两种不同埋深情况下的液化分析，得出了埋深不同液化区出现区域不同的结论，并提出隧道抗液化的合理埋深。 |
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Abstract: In this paper,the feasibility of the separation of nano-CaCO3 slurry is studied and the operating parameters affecting the process are investigated.
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文摘:论证了用板框过滤纳米碳酸钙悬浮液的可能性，讨论了操作条件对该分离过程的影响，并指出了这种方法存在的不足及改进的方向。 |
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Abstract: In this paper,the feature of stamping part is divided into form feature,tolerance feature,management feature and material feature.The definition of theses feature and the relationship between them are presented.Then,a feature-based product defin
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文摘:针对冲压件特点，将冲压件特征分为形状特征、精度特征、管理特征及材料特征，给出了这些特征的定义并描述了它们之间的联系，提出了基于特征的冲压件定义模型；然后对冲压件形状特征的表达及建模方法进行了详细的描述，为后续的冲压工艺设计提供了坚实的基础。 |
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Abstract: In this paper,the kinematically admissible velocity fields are established by using the metal flow patterns based on the experiments,and the configuration dimensions of billet and the curves of Load-stroke in precision forging process for spur g
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文摘:本文利用有实验根据的变形流动模式建立动可容速度场，利用上限法模拟用实心坯料精锻直齿圆柱齿轮时坯料的外形尺寸变化和力—行程曲线，所得结果与实验测定值很一致，可供冲挤精锻工艺设计参考。 |
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Abstract: In this paper,the laser transformation hardening(LTH)system which used for Die and Mould and laser processing methods are introduced.The relationship between depth of hardening layer,wear resistance properties and laser hardening processing para
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文摘:介绍了用于模具表面的激光强化加工系统和激光强化工艺方法，讨论了激光强化模具表面的硬化层深度和耐磨性能与激光强化工艺参数之间的关系，采用激光强化技术能大幅度提高模具的使用寿命。 |
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Abstract: In this paper,the lawful metrological units were compared with the abrogated units in analytical chemistry,and the common mistakes in the application of the lawful metrological units were discussed.Some correct examples in the application of the
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文摘:对分析化学领域中常见的法定计量单位与其对应的废弃形式进行了比较，指出了应用中常见的错误，并汇集了该领域中有关计量单位表述的正确范例。 |
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Abstract: In this paper,the mathematics model of the heat exchange in the combustion chamber of the ceramic furnace was established.Influences of the insulation on heat exchange in combustion space of ceramic furnace was simulated.
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文摘:本文建立了陶瓷窑炉火焰空间系统传热数学模型，根据该数学模型模拟了保温对火焰空间系统对物料传热的影响。 |
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Abstract: In this paper,the pollution sources and the hazards of the pollutants in nitrotoluene production are briefly described,the various approaches for reducing and eliminating the pollution by adoption of cleaner production are outlined.
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文摘:简介一硝基甲苯生产过程中污染物的产生和危害，概述了采用清洁生产技术减少和消除污染的各种途径。 |
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Abstract: In this paper,the preparation of the catalysts for the oxidation of Fluorene to Fluoreone is studied.The influences of the dipping time,calcining temperature,calcining time and the air quantity during the calcination are discussed.
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文摘:研究了用工业芴气相氧化制取芴酮的催化剂制作条件，考察了浸渍时间、煅烧温度、煅烧时间和煅烧空气量对催化剂制作的影响. |
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Abstract: In this paper,the problems of the window set-up,the forward receiving method by mirror and the way of side direction receiving ,when LDV is used to measure the velocity of water flow inside a circular tube,are discussed and some practical experi
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文摘:使用二维激光多普勒测速仪(LDV)对圆管中水流进行测速时，对于窗口的设置、利用反射镜前向接收的方法和侧向接收方式等问题,本文进行了探讨，并总结了测量中的一些实际经验。 |
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Abstract: In this paper,the reason arisen from the noise of the BX1 AC arc welder is analysed.For the main factor,moving core viberating,the measure to reduce the noise is advanced from three hands,inside and outside slide.The other measure is also advanc
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文摘:对BX1系列交流弧焊机噪声产生的原因进行了分析，针对产生噪声的主要原因——动铁芯的振动，从三个方面、内外滑道分别提出了具体的降低措施，并对次要原因也提出了具体降低措施。 |
