建设项目初步设计概算的审查

总结关于初步设计概算审查的经验,包括内容、方式、人员、方法等。     

鼓泡塔中的有效涡扩散系数及湍流特性

依据湍流模式理论提出新的有效涡扩散系数关系式,讨论其与既有关系式的异同并与湍流实测数据比较,结果表明,本文关系式给出与实测值更为一致的结果,而既有的一些关系式的计算值偏高．由此讨论了涡扩散系数与鼓泡塔流动模型的关系,指出了数据偏差产生的原因．     

高温装置工程放大的基础技术

讨论了高温装置工程放大的基础,涉及固体结构和流体流动在时空尺度上外推的若干问题,综述了学科前沿的研究进展,并提出拟实工程放大的概念。     

Prediction of cellular structure in free expansion of viscoelastic media

A systematic model is presented for a free expansion polymer foaming process that includes simultaneous nucleation and bubble growth. An influence volume approach, which couples nucleation and bubble growth, is used to account for the limited supply of dissolved gas. The melt rheology is described using the Larson viscoelastic model. The initial conditions are obtained at the upper bound of critical cluster size under conditions of elastic deformation. The resulting set of equations are solved using a combination of numerical techniques. A parametric study is conducted to examine the effects of key process variables on bubble growth, nucleation, and final bubble size distribution. It shows that the factors influencing nucleation and growth affect the ultimate bubble sizes and their distribution. The Gibbs number, a dimensionless measure of the barrier to overcome for nucleation, has the strongest impact on the cellular structure of the foam. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:1353–1368, 1998     

浅析压敏乳胶商标纸卷翘的原因及防治措施

本文介绍了压敏乳胶商标纸卷翘的几种形式；分析了其产生的原因并提出了防治措 施。     

冒泡压力对过滤介质(芯)过滤比的影响

本文论述了冒泡压力和过滤介质（芯）过滤比这两个不同定义概念的关系。二者定义不同,却互为影响。由于介质特性和组织结构不同,以及试验条件的不同,其相互影响的程度也没有一定的常数。     

涂料粘度测度Ⅰ.气泡粘度计法

粘度是涂料产品的重要指标之一,是测定漆料中聚合物分子量大小的可靠方法,粘度的测定对于涂料生产过程的控制、保证产品质量十分必要。介绍了气泡粘度计的测量原理、规格种类、测量方法及影响因素。     

Bubble size and mass transfer coefficients in dual-impeller agitated reactors

The study relates to the mass transfer and the bubble size in a non standard vessel equipped with various dual-impeller combinations. The effects of the rotational speed, gas flow rate, impeller type and diameter are investigated. The volumetric mass transfer coefficient k_La and the bubble size d_bs were studied. The liquid side mass transfer coefficient k_L and the volumetric interfacial area a were estimated separately. A comparison has been made with some existing correlations.     

改性沥青混凝土路面上面层施工质量控制

根据南友高速公路C1标段的施工经验,论述了改性沥青混凝土路面上面层材料组成设计、沥青混合料调试、生产及机械摊铺、碾压的施工质量控制要点以及施工过程中注意的问题,以提高路面的施工质量。     

伸缩缝对多层建筑顶升纠偏的影响及处理方法

根据建筑物发生不均匀沉降后伸缩缝的变形特点和破坏类型,分别讨论了伸缩缝对建筑物纠偏加固的影响,提出了可行的解决方案,为建筑物纠倾的顺利实施提供了保证.