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Abstract: It presents a new design method for pressure vessel in plasticstate with the help of FEM, and gives an optimized thick or profile design.
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文摘:以失效前材料全部进入塑性为设计准则，对压力容器提出了用有限元法进行了优化设计的方法。 |
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Abstract: It presents the theory and structure of computer aided assembly process planning system based on the agile manufacturing mode, and analyzes the modules which make up of this system，including the acquiring of assembly information，the construction
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文摘:介绍了敏捷制造模式下的装配工艺设计系统的原理与体系结构，对系统中装配信息的获取、装配工艺知识库的建立、装配顺序的决策以及装配仿真的实现等几个模块进行了具体的分析。 |
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Abstract: It proposes a model for shaft centerline measurement and winding level,gives the coordinates transformation formula of measured data,and develops the program diagram for centerline measurement of wind-shaft.
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文摘:提出了一种便于微机处理的轴线的空间解析表达方法以及轴线弯曲程度的表示方法，给出了轴线测量数据获取方法与坐标转换公式，提出了零件轴线弯曲时精密测量的一般步骤。 |
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Abstract: It provides some suggestions to develop traffic transportation, through reviewing the containerized direct traffic, the management of dangerous cargo container, the development of modem logistic and German macroscopicial regulate and control pol
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简介：摘要：通过对德国集装箱多式联运、危险货物集装箱管理和现代物流的发展以及德国政府对公路、铁路和水路三大交通管理体制的宏观调控政策的考察，提出我们发展交通运输业的若干建议。 |
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Abstract: It was an effective and economical way that the relationship of food chain between eagle and rodent was used to control the latter.
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文摘:利用鹰、鼠的食物链关系招鹰灭鼠，控制鼠类猖獗为害，是草地鼠害防治经济有效的途径。 |
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Abstract: It was deduced that the shapes of magnetic particle indicationsof point-type defects on workpiece surface depended on the resistance of carrier medium, and their dimensions depended on the volume of the defect equivalent cuboid, the magnetising
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文摘:推断出工件表面点状缺陷磁痕的形状取决于磁粉载体的介质阻尼力，磁痕大小取决于缺陷等效长方槽的体积、工件和磁粉材料的磁化特性、磁场强度、磁粉长度和横截面积以及载体介质的阻尼特性等。 |
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Abstract: It was studied by us that new technologies using strong pulsed magnetic field and electric current were applied to refine metal's solidified structure.These technologies improved remarkably the solidified structure of LY12 aluminum alloy and mad
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文摘:提出了用强脉冲磁场和电流细化金属凝固组织的新工艺.与未经磁场或电流处理的凝固样品相比，强脉冲电磁场能够显著地改善LY12铝合金的凝固组织，使晶粒明显细化、球化,电磁场的强度愈强，这种改善效果愈明显.对该新工艺的细化机理进行了理论分析，同时，指出了实验中的新现象和新问题. |
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Abstract: It was verified through experiment and measurement that there was growth phenomenon taking place with nodular iron castings after graphitizing annealing at low temperature.The emergence mechanism and reason of the “ annealing growth nature” was
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文摘:通过试验和测试，证实了球铁件经低温石墨化退火后存在的生长现象，并对这种“退火生长性”产生的机理及原因进行探讨，提出了防止措施。 |
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Abstract: It's an important problem to determine the stability of zero solutions of linear neutral differential equation. A simple judgment on this problem is given.
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摘要:线性中立微分方程的一个重要问题是其零解渐进稳定性。文章给出一个简便的稳定性判断准则。 |
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Abstract: Iterative learning control is an effective approach to the control of processes that are repetitive in nature.In this paper,an open-closed-loop PI-type iterative learning control scheme for the precise tracking control of a class of discrete non
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文摘:对于具有重复运动性质的对象，迭代学习控制是一种有效的控制方法.针对一类离散非线性时变系统在有限时域上的精确轨迹跟踪问题，提出了一种开闭环PI型迭代学习控制律.这种迭代律同时利用系统当前的跟踪误差和前次迭代控制的跟踪误差修正控制作用.给出了所提出的学习控制律收敛的充分必要条件，并采用归纳法进行了证明.最后用仿真结果对收敛条件进行了验证. |
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Abstract: Judicial proof authentication at court is a litigation procedure during which judges attest the truth of the case at court.
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文摘:法官当庭认证是法官当庭认证案件事实的一种诉讼活动。 |
