双通线加热的热力学及实验分析(英文)

The present investigation deals with process analysis of oxy-acetylene flame assisted double pass line heating for varying plate thickness. oxy-acetylene flame as the heat source for multi pass line heating to achieve 3-D bending of plates with varying thicknesses was studied. The oxy-acetylene flame was modeled as the moving heat source in the FEM analysis. The transient thermal histories were predicted taking into account the temperature dependent thermo-mechanical properties. A comparative study between single pass and double pass line heating residual deformation was also carried out. The temperature distribution and residual deformations predicted by the numerical model developed in the present work compared fairly well with those of the experimental ones.     

Experimental Investigation of TARMAX Model for Modeling of Hydrodynamic Forces on Cylinder-like Structures

A new approach that models lift and drag hydrodynamic force signals operating over cylindrical structures was developed and validated. This approach is based on stochastic auto regressive moving average with exogenous (ARMAX) input and its time-varying form, TARMAX. Model structure selection and parameter estimation were discussed while considering the validation stage. In this paper, the cylindrical structure was considered as a dynamic system with an incoming water wave and resulting forces as the input a...     

交通拥堵反思

通过对交通拥堵进行反思,认为交通拥堵是充满活力的成功城市的伴生品,应从不同角度考虑拥堵问题.提出了十项有别于传统观点的提议,主要包括:机动性至关重要,交通拥堵是社会、经济活力的象征;道路扩容效果短暂,并会诱发潜在需求,但仍可带来一定的社会、经济效益;土地使用对出行行为的改变需要长期的努力;紧凑型发展会加剧交通拥堵;降低...     

中国城市道路规划方位性问题研究

文章结合中国的传统建筑文化理念和现代科学原理,从历史文化、能源节约、环境保护、房地产定价、交通安全等多方面分析研究了城市道路在规划和设计时所应遵从的定向规则。     

PORT OF SEATTLE STATEMENT REGARDING 21ST CENTURY

It is impossible to overstate the importance of the World Wide Web to any business, including ports, and there will come a day in the not-too-distant future when all internal and external processes involving the Port of Seattle will be Web-based. We see nothing but growth in the continued application of the Web to our everyday business. The Port has launched a five-year eBusiness strategy to help maintain our position as an innovative leader among ports. There are virtually no     

内燃机车的新型控制器

苏联的内燃机车从1988年起就开始采用三种新型控制型：干线内燃机车用的KM-2000型控制器，带电阻制动和无电阻制动调车内燃机车用的KM-2100型联合控制式控制器以及带电阻制动干线内燃机车用的KM-2200型控制器。本文介绍了这些控制器的结构特点、技术参数和使用情况。     

Bio-analytical method development and validation of Rasagiline by high performance liquid chromatography tandem mass spectrometry detection and its application to pharmacokinetic study

The most suitable bio-analytical method based on liquid liquid extraction has been developed and validated for quantification of Rasagiline in human plasma. Rasagiline-13C3 mesylate was used as an inte...     

电流变流体的润滑性能研究

提出了电流变流体作为润滑剂使用的新设想,研究了电流变流体粘度的可控特性,通过试验获得了电流变流体摩擦力随电场强度、悬浮颗粒浓度、油膜厚度等因素的变化规律,为深入研究电流变流体的润滑特性奠定了基础。     

THE ANALYSIS OF CHILD′S GROWTH TREND DURING 1958～1995 IN XI′AN CITY

ＷｉｔｈｔｈｅｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｅｃｏｎｏｍｙａｎｄｔｈｅｅｌｅｖａｔｉｏｎｏｆｎｕｔｒｉｔｉｏｎｌｅｖｅｌｉｎＣｈｉｎａ,ｔｈｅｃｈｉｌｄ＇ｓｇｒｏｗｔｈｈａｓｉｍｐｒｏｖｅｄｒｅｍａｒｋａｂｌｙ．Ｉｎｔｈｉｓｐａｐｅｒ,ｗｅｃｏｌｌｅｃｔｅｄｔｈｅｄａｔａｏｆ８ｉｎｖｅｓｔｉｇａｔｉｏｎｓｏｎｇｒｏｗｔｈｏｆｃｈｉｌｄｒｅｎａｇｅｄ７～１７ｙｅａｒｓｂａｓｉｓｆｏｒｆｕｒｔｈｅｒｉｍｐｒｏｖｉｎｇｃｈｉｌｄ＇ｓｌｉｖｉｎｇｃｏｎｄｉｔｉｏｎｓ．Ｔｈｅ８ｉｎｖｅｓｔｉｇａｔｉ…