INNOVATIVE APPLICATIONS OF IONIC LIQUIDS AS “GREEN” ENGINEERING LIQUIDS

Over the past decade, ionic liquids (ILs) have become one of the fastest growing “green” media for chemists and engineers due to their superb physicochemical properties. The applications of these remarkable salts in reactions and extraction processes have been extensively investigated and reviewed. This review, however, highlights recent advances of ILs as versatile “green” engineering liquids in a variety of industrial applications including heat transfer fluids, azeotrope-breaking liquids, lubricants, electrolytes, liquid crystals, supported IL membranes, plasticizers, and more. This review is not intended to be comprehensive, but rather to discuss the potentials of ILs for diverse industrial applications.     

煤矸石对硅酸盐水泥水化历程的影响

从强度、反应程度、孔溶液碱度和SEM等方面,研究了煤矸石作为水泥辅助胶凝材料的水化情况,并与Ⅱ级粉煤灰进行比较。试验结果表明:煤矸石发生火山灰反应时间比粉煤灰早,且发生火山灰反应所需的碱度值比粉煤灰低;掺煤矸石水泥水化样的早期抗压强度比粉煤灰水泥水化样低,但7d到28d强度增长速率明显大于相同掺量的粉煤灰水泥,相同28d抗压强度的条件下,煤矸石掺量比粉煤灰的掺量高10%。     

1991—1992国外工程塑料进展

介绍了1991～1992年国外工程塑料研究和生产概况。论述了通用工程塑料、特种工程塑料和聚合物合金的研究开发、改性和应用方面的进展。且指出工程塑料发展趋势和特点;对复合材料技术进展作了较详尽的分析与阐述。     

An analysis of transport phenomena for multi-solid particle systems at higher reynolds numbers by a standard karman—pohlhausen method—I Momentum transfer

Using the concentric spheres free surface model and a standard 4th polynomial Karman—Pohlansen method, the dimensionless tangential stress distribution, and the dimensionless pressure distribution around a solid sphere in a swarm, and the viscous, form and total drag coefficient for multi-solid particle systems were computed numerically at higher Reynolds numbers. The void function obtained from the drag coefficient for multiparticle system was comparative to the experimental data. The friction factor for multi-particle systems so computed agreed with the experimental data of packed and distended beds.     

基于广义Hoek-Brown准则的节理岩体力学参数折剪计算

节理化岩体力学参数是矿山工程地质和稳定性分析的重要基础数据,一般在实验室通过单轴、三轴试验只能得到岩石的力学参数,无法得到岩体的力学参数。目前,利用岩石力学参数确定岩体力学参数的方法较多,但都过于烦琐或准确度不高,急需一种新的简易确定方法。因此,通过利用基于广义Hoek-Brown准则的地质强度指标（GSI法）,并结合相应的岩土分析软件,强度折剪岩石力学参数值,从而得到岩体的力学参数。通过将该方法应用于赤峰中色白音诺尔矿业有限公司岩体力学参数的计算中,证明采用该方法考虑岩体的结构面和完整性,可较为准确地反映节理化岩体的力学特性,且方便可行,具有工程实用价值。?     

基于问题框架的计算机辅助需求工程工具的研发

问题框架(Problem Frames,PF)已经得到需求工程界的广泛重视和研究。目前,问题框架在理论基础和开发方法等方面已经有很多研究成果,但如何把它们应用到实际的软件开发项目中仍是一个有待解决的问题。本工具可帮助系统分析员实现从用户需求到软件规约的平滑和可推理的变换,从而为软件开发项目中需求的沟通、建模及分析等提供技术支持。此外,该工具产生的结果也为下一步的软件设计提供帮助。它对促进问题框架方法的进一步发展和成熟,如从研究走向实用,具有重要的推动作用。     

信管专业网络工程实践教学课程体系建设方案的探讨

针对实践教学在培养信管专业应用与创新人才方面具有的重要的作用,文章分析了信管专业网络工程实践教学课程体系的层次与内容、课程设置和教学过程中所遇到的问题,并提出解决应用型本科地方高等院校中信管专业网络工程实践教学课程体系建设方案的一种可行性思路。     

手机二维码整合三亚旅游资源的应用研究

分析了手机二维码的特点,手机二维码技术在三亚旅游市场的应用研究,通过整合三亚旅游资源,可以提高三亚旅游服务效率和服务水平,规范旅游市场,积极推进三亚市旅游市场的信息化建设。     

基于项目驱动的合作学习在“信息系统原理与工程”课程教学中的应用

通过分析“信息系统原理与工程”课程实施过程中的若干不足,提出了基于项目驱动的合作学习方法,并详细介绍了该方法的具体实施过程和若干注意事项。实践证明该方法在提高学员自主性和创造性,增加学员开发能力方面效果显著。     

Theory and experiment on the three-dimensional motion of a freely suspended spherical particle at the entrance to a pore at low Reynolds number

This paper examines the three dimensional approach of a neutrally buoyant sphere of any size to a circular hole in a plane wall at very low Reynolds number. The analysis differs from previous studies, largely applied to the multipore filter, in that the authors investigate the three dimensional hydrodynamic interaction of the sphere with the entrance geometry of the pore in the limit of zero inertia. The problem is first exactly formulated as the linear superposition of fundamental Stokes flows for rotation and translation of the sphere and flow past a stationary sphere. Approximate solutions are then obtained for the deviation of sphere trajectories from fluid stream lines and the results compared with laboratory model experiments in a low Reynolds number settling tank. The theory and experiment show that because of the hydrodynamic interaction sphere trajectories and fluid streamlines deviate significantly as the opening is approached, that all spheres eventually enter the pore regardless of their initial position, but that a non-uniform concentration profile develops with large increases in concentration near the walls of the orifice in the vicinity of the opening. The results provide a basic mechanism to explain the onset of Fahraeus phenomenon for red cells entering small blood vessels and glass tubes.