压制球形药包解决退模问题的技术措施

文中简要阐述了在制备球形药包过程中,为解决压装药件的退模问题所采取的技术措施,并提出了较佳的成型底座的设计方案。     

Valid parameter range analyses for chemical reaction kinetic models

The present work quantifies the relations between the structure of a chemical reaction kinetic model, its valid parameter range, and the truncation error tolerance of the model. General methods are presented to solve the three important problems of valid parameter range analysis: (1) identification of the valid parameter range of a kinetic model, (2) estimation of the error tolerance required when applying a kinetic model over a specified parameter range, and (3) improvement of existing model generation algorithms to construct more robust models. Finally, the relationship between a model's structure, its valid parameter range, and the truncation error tolerance are illustrated by the flexibility-tolerance-model graph. The new methods are applied to pyrolysis of methane/ethane mixtures.     

Pultruded fibre reinforced polyurethane composites II. Effect of processing parameters on mechanical and thermal properties

This paper presents a novel process for the fabrication of pultruded polyurethane (PU) composites. The effects of the processing parameters on the mechanical properties (flexural strength and flexural modulus, etc.) and thermal properties (HDT) of the fibre reinforced PU composites by pultrusion have been studied. The processing parameters investigated include pulling rate (in-line speed), die temperature, filler type and content, and post-cure time and temperature. Results show that the composites possessed various optimum pulling rates at different die temperatures. On the basis of the DSC diagram, the swelling ratio, the mechanical properties and the thermal properties of composites, the optimum die temperature can be determined. It is found that the mechanical and thermal properties increase with filler content for various types of filler. The mechanical and thermal properties increase at a suitable post-cure temperature and time. Furthermore, the properties which decreased due to the degradation of composite materials for a long post-cure time will be discussed.     

基于MATLAB优化工具箱的行星轮系参数优化设计

为了合理分配行星轮系的总传动比，并使系统体积小、质量轻，建立了具有3个设计变量、1个目标函数和8个约束方程的优化设计数学模型，并用MATLAB优化工具箱进行求解。经实例计算和分析，说明这种优化方法符合实际、准确可靠；设计的数学模型有一定的使用价值，为深入研究行星轮系建立了基础。     

水土保持工程施工阶段的设计变更

通过对水土保持工程施工阶段设计变更原因的分析，指出水土保持生态工程施工阶段变更的必要性和建设、监理单位对变更管理的重要性。通过对变更设计的程序和原则进行的分析，阐述了变更设计涉及的几个主要问题。     

10000m^3内浮顶油罐双浮动吸油装置设计

介绍了某油库扩建工程中10 000 m3内浮顶油罐双DN500浮动吸油装置的结构设计,并对内浮顶罐浮动吸油装置的浮力进行了优化配置,此经验对我国内浮顶油罐浮动吸油装置的设计和使用具有一定的指导意义.     

大跨度架空输水钢管的纵向局部加强设计

本文给出了用加强板加大管道截面系数来增加架空输水管道跨越距离的设计方法及其计算过程,并用实例说明了用此种方法加强大跨度管道的有效性和合理性。     

安阳市民用建筑有线电视管道工程设计及施工规范

针对近几年安阳市城区规模的不断扩大和安东新区的开发启动以及房地产市场的迅速发展，根据相关标准，结合安阳市城市发展的实际需要，提出了安阳市民用建筑有线电视管道工程设计及施工规范。     

正确运用规范把设计质量提升到一个新的高度

就民用建筑设计部门设计图纸质量抽查中出现的问题，进行了剖析并提出了注意事项。