元数据管理系统是构建、管理、维护和使用数据仓库系统的核心部件。
Metadata management system is the core of construction and management and maintenance and use data warehouse system.
机电一体化产品分系统（整机）和基础元、部件两大类。
Mechanical and electrical subsystems integration products (complete machine) and the foundation yuan, part two categories.
系统阐述利用有限元法对机械结构零部件进行疲劳断裂分析的相关理论和方法。
The relative theory and methods on the analysis of the fatigue and fracture of mechanical components by means of the finite element method are discussed.
这些计算公式均以系统元部件可测参数来表示，因此对实际的系统设计和性能评价有重大实用价值。
Formulas based on the directly measurable parameters of the system are proposed, which can be applied to system design and evaluation.
而边界元法对于处理机械系统中的刚性和柔性结合部比较方便，因此，运用边界元法对机械系统零、部件及整机进行建模和解析具有非常重要的意义。
Because BEM has an advantage in dealing with a rigid or flexible joint, its application in modeling and analysis of mechanical system plays an important part.
而边界元法对于处理机械系统中的刚性和柔性结合部比较方便，因此，运用边界元法对机械系统零、部件及整机进行建模和解析具有非常重要的意义。
Because BEM has an advantage in dealing with a rigid or flexible joint, its application in modeling and analysis of mechanical system plays an important part.
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