对当代中国建筑文化价值取向的反思——以1978-2014年《建筑学报》为参照系的研究

以1978-2014年的《建筑学报》为参照系,从传统价值、地域价值、创新价值3个方面梳理出当代中国建筑文化发展的基本价值取向与文化价值的建构过程.     

当他们谈论“现代建筑”时,他们在谈论什么?——1980-1992年的《建筑学报》与香山饭店

介绍当代中国建筑史上的重大事件——1982年完工的香山饭店,指出从1980-1992年,《建筑学报》的相关文章有15篇之多,这一系列文章,是对该建筑事件的记录,还折射出这12年间中国建筑语境的微妙变化——这是一个“现代主义”观念向中国本土移植的艰难过程.     

《建筑学报》创刊始末

研究《建筑学报》创刊的历史背景,集中论述其在1954年的发展及其与诸多历史事件及人物间的联系,讨论该刊在新中国国家建构过程中的作用.     

Measurement of circumferential viscosity profile in stationary journal bearing by shear ultrasonic reflection

Viscosity is the most important property of a lubricant that can affect bearing performance. It controls the film thickness that is established during an operation. In this study, the ultrasonic method was used to measure the static viscosity profile around a journal bearing by using shear reflection coefficients at several locations around the journal bearing. This enables the viscosity profile to be established. The technique introduced was found to be successful and acceptable results were obtained from certain regions of the journal bearing flow. This study serves as a preliminary work for developing viscosity measurement in a rotating journal bearing.     

Predicting friction reliably and accurately in journal bearings—A systematic validation of simulation results with experimental measurements

It is the aim of this work to predict friction in journal bearings reliably and accurately under realistic dynamic working conditions. To this purpose elastohydrodynamic (EHD) calculations using an extensive oil-model and including an approach to the conformal roughnesses of the bearing surfaces are carried out for transient loads typical for current utility vehicles (40 MPa) as well as for considerably higher specific loads (70 MPa) and for different lubricants (SAE10, SAE20, SAE30 and SAE40) to account for a large span of working conditions ranging from full film lubrication to mixed lubrication with metal-metal contact.The results obtained from this simulation model are compared to measurements performed on a journal bearing test rig. We find that the results of the presented approach agree very closely with the experimental values. The presented approach allows consequently to investigate the effectiveness of changes in bearing geometry, bearing materials, bearing surface roughness, lubricant viscosity and engine operating conditions to reduce friction in journal bearings.     

.NET环境下利用UG/NXOpen和UG/Journal对UG的二次开发

分析了UGNX6.0软件提供的二次开发技术及当前常用的开发方法,针对低效率的问题,提出基于.NET平台通过UG/NXOpen和UG/Journal(日记)软件的联合应用实现uG的快速参数化设计的方法,并给出采用此方法实现参数化自动建模的一个实例,验证了此方法的可行性.     

《太阳能学报》引文定量分析与研究

文章依据《中国科学引文数据库》对1990-2000年《太阳能学报》被国内科技期刊引用频次及其它指标进行计量统计、分析、归纳和综合评价,旨在从中揭示出该刊在文献交流等方面的基本特点及带有规律性的结论。     

切割机空气静压电主轴径向承载力及刚度的设计

径向承载力及刚度是影响切割机空气静压电主轴高转速下工作稳定性的重要因素,也是切割机空气静压电主轴重要的设计指标。本文采用工程计算方法,对切割机空气静压电主轴径向承载力及刚度进行设计计算。     

Swan song.

Presents remarks from the outgoing editor of the Journal of Experimental Psychology: General. The author thanks the readers, writers, reviewers, and unsung administrators and technicians without whom publication of the Journal would be impossible. The author also discusses some of the challenges involved in journal publication, and proposes an alternative scheme for this endeavor. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of electric field on hydrodynamic characteristics of finite-length ER journal bearings

A numerical analysis is performed on the hydrodynamic characteristics of electrorheological (ER) fluid flows in journal bearings based on computational fluid dynamics (CFD) techniques. The bearing has a finite-length and operates under incompressible laminar flow with steady conditions. The analysis is based on the numerical solution of full three-dimensional Navier–Stokes equations. The applied electric field is imposed partially along a contractive section of the journal bearings and the modified Bingham plastic model is used to describe the behavior of ER fluid. The results presented are obtained by using finite-volume-methods and solved by the semi-implicit method for pressure-linked equations (SIMPLE) algorithm. In this study, cavitation effects are also considered by using the viscosity modeling. The results have shown that the influences of ER effects, caused by the applied electric field, on the journal bearing characteristics are significant and not negligible. Compared with the Newtonian lubricant case, the effects of the ER effects provide an enhancement in the load-carrying capacity, but do have little effects on the attitude angle. The quantitative effects on load-carrying capacity are more pronounced for journal bearings operating at higher values of eccentricity ratio or lower rotary speed.