基于AM186处理器的深度测量系统

本文介绍了一种基于AM186嵌入式处理器、采用深度脉冲计量法实现油井深度测量、并通过网络传递数据信息的系统.该系统已经成功应用于石油勘测领域.     

数字城市建设中单体建筑物三维模型的实现

介绍了CSG/B-rep混合模型的基本情况，以太原理工大学办公楼为例，利用OpenGL在VC 下建立模型，绘制和显示了三维图形，指出该混合建模手段的采用，对数字城市的建设具有重要的意义。     

常温,常压下合成氨工艺气爆炸极限的计算

本文通过合成氨工艺气体与空气混合气爆炸极限实验测定的结论和实验数据的分析、回归，获得了室温、常压下计算任意组成的合成氨工艺气爆炸极限的计算公式     

Influence of polymer viscosity on the morphological and opto‐electronic behavior of polysiloxane dispersed ferroelectric liquid crystal composite thin films

Poly(dimethyl)siloxanes of different viscosity have been synthesized by hydrolytic condensation of dimethyldichloro silane. Polysiloxane dispersed ferroelectric liquid crystal (PDFLC) composite films were prepared simultaneously by solvent induced and polymer induced phase separation techniques (SIPS and PIPS, respectively). These composite films were prepared by mixing polymer and ferroelectric liquid crystal mixture in diethyl ether and then adding 0.2% of room temperature vulcanizer for crosslinking. Film morphology, droplet size, and electro‐optic parameters of PDFLC systems have been studied by using polysiloxanes of different viscosity. We show that the polymer viscosity affects the droplet size, morphological uniformity, electro‐optic properties, and also the extent to which the phase separation is complete. These composite systems show the switching time of few microseconds. Structure‐property correlation in these materials have been studied and explained on the basis of polysiloxane viscosity. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 159–166, 2004     

Effects of solvent adsorption on solution properties of poly(vinyl alcohol)/dimethylsulfoxide/water ternary systems

In this study, the solvent adsorption phenomena of poly(vinyl alcohol) (PVA) in cosolvent mixtures of dimethylsulfoxide (DMSO; solvent 1) and water (solvent 2) were investigated. Typically, this cosolvent mixture could form hydrogen‐bonded DMSO/(water)₂ complexes, involving one DMSO and two water molecules. Because of the complex formation in the cosolvent mixtures, PVA chains preferentially adsorb water molecules at DMSO mole fraction X₁ < 0.33, but preferentially adsorb DMSO molecules at X₁ > 0.33. The preferential adsorption of DMSO (a good solvent for PVA) could cause the relatively extended conformation of PVA chains in solutions because of the increase in excluded volume effect. Because of various interactions between PVA chains and cosolvent mixtures, the aggregation and gelation behaviors of PVA solutions were significantly affected by the composition of cosolvent mixture. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 3211–3217, 2004     

Walking through CS AKTive Space: a demonstration of an integrated Semantic Web application

We describe CS AKTive Space, an integrated semantic web application and winner of the 2003 Semantic Web Challenge [http://www.challenge.semanticweb.org/]. A demonstration of the application is available at http://cs.aktivespace.org/. CS AKTive Space represents and integrates a wide range of heterogenous resources representing the computer science domain in the UK; it supports the exploration of patterns and implications inherent in the content and exploits a variety of services, visualisations and multidimensional representations to support questions like who is working with whom, where are there geographical concentrations in funding or research area, who are the most significant researchers in an area. We briefly show how this demonstration illustrates a number of substantial challenges for the Semantic Web. These include problems of referential integrity, tractable inference and interaction support. We review our approaches to these issues and discuss relevant related work.     

Consideration of some dilute-solution phenomena based on an expression for the Gibbs free energy

Rigorous expressions based on the Lennard-Jones (6–12) potential, are presented for the Gibbs and Helmholtz free energy of a dilute mixture. These expressions give the free energy of the mixture in terms of the thermodynamic properties of the pure solvent, thereby providing a convenient means of correlating dilute mixture behavior with that of the pure solvent. Expressions for the following dilute binary solution properties are derived: Henry's constant, limiting activity coefficients with their derivatives, solid solubilities in supercritical gases, and mixed second virial coefficients. The Henry's constant expression suggests a linear temperature dependence; application to solubility data for various gases in methane and water shows a good agreement between theory and experiment. In the thermodynamic modeling of supercritical fluid extraction, we have demonstrated how to predict new solubility-pressure isotherms from a given isotherm, with encouraging results. The mixed second virial coefficient expression has also been applied to experimental data; the agreement with theory is good.Paper presented at the Ninth Symposium on Thermophysical Properties, June 24–27, 1985, Boulder, Colorado, U.S.A.     

解析沥青混合料拌和站的成本控制方法

为了降低沥青混合料拌和站的成本,对沥青混合料拌和站设备的燃烧系统与导热油炉进行了改造,并从轧石场的选择、原材料的堆放、现场矿粉的生产等方面给出了料场管理的建议,总结了一些设备操作与保养的成本控制措施,以达到提高企业经济效益的目标。