河北省张承地区风沙现状及治理对策

在分析张家口、承德地区风沙形成原因及发展趋势的基础上,提出了河北省防沙治沙工作中存在的问题,根据河北省不同类型区的自然、地理及社会经济条件,提出了风沙治理模式和建议。     

Analysis and visualisation with host-based software – The features of STNAnaVist™

This article is based on experiences with data and text mining to gain information for strategic business decisions, using host-based analysis and visualisation (A/V), primarily in the field of patents. The potential advantages of host-based A/V are pointed out and the features of the first such A/V software, STN^®AnaVist™, are described in detail. Areas covered include the user interfaces, initial set of documents for A/V, data mining, text mining, reporting, and suggestions for further development.     

超速状态的"混乱"呈现--2005首届深圳城市\建筑双年展评述

文章从“展览描述”、“展览性格分析”、“展览学术分析”三个层面对张永和作为独立策展人的首届深圳“城市＼建筑”双年展进行解读与剖析。     

Optimizing the Vacuum Heat-Treatment of Hot-Work Tool Steels by Linear Elastic Fracture Mechanics

Linear elastic fracture mechanics was used to optimize the vacuum heat-treatment procedures for conventional hot-work AISI H11 tool steel. The fracture toughness was determined with non-standard, circumferentially notched and fatigue-precracked tensile-test specimens. The fracture-testing method is sensitive to changes caused by variations in the microstructure resulting from the austenitizing and tempering temperatures as well as the homogeneity of the material itself. The combined tempering diagram- Rockwell-C hardness, Fracture toughness K_Ic, Tempering temperature was used for the choice of the vacuum heat-treatment parameters necessary to obtain the best properties for a given application with respect to the investigated steel.     

钛及钛合金中氧和氢的联合测定

叙述了用红外吸收法对钛及钛合金中氧和氢联合测定的方法，取得了测定的最佳条件。连续测定6次的相对标准偏差在10％以下，作加标回收试验的回收率为95．6％～103．9％。分析时间在3min以内，可应用于日常分析，结果满意。     

环境友好油层保护钻井液的研究及应用

针对江苏油田地层特性和地面生态环境具体情况开展了钻井液防塌性能、油层保护与环境保护的协同研究。在研制和筛选能满足环境保护要求的钻井液处理剂如润滑剂、降滤失剂和油层保护剂等的基础上,通过配方优化研制出了环境友好油层保护钻井液体系,并进行了防塌、油层保护、裂缝封堵等性能的室内评价。评价结果表明:该钻井液体系具有较强的抑制泥页岩膨胀和分散能力,渗透率恢复值大于85%,润滑性及滤失性好,而且无生物毒性,化学毒性低,易生物降解。应用该钻井液体系在江苏油田AF地区进行了现场试验,现场应用表明,该钻井液体系防塌性和油层保护效果好,各项环境指标达到农用污染标准,可直接排放,从源头控制了钻井液的污染,可进一步推广应用。     

松嫩平原洪涝旱碱综合治理及水土资源可持续利用问题

文章依据松嫩平原洪、涝、旱、碱综合治理和在水土资源中存在的问题，提出必须加大科研力度，提高技术含量，从保护生态环境可持续开发利用自然资源的战略角度出发，综合治理洪、涝、旱、碱灾害，并提出了一些具体作法。     

Procedure for Measuring Low Concentrations of H2 and H2S Above a Water Surface

A simple measuring procedure for low concentrations of H₂ and H₂S (at the level of ppm fractions) above the surface of water by using sensitive gas analyzers is suggested. The procedure is easily accomplished in conditions outside the laboratory (under field conditions).     

Discrete Modeling and Suggested Measurement of Heat Transfer in Gas-Solids Flows

This article presents a two-dimensional transient model for gas-solids flow and heat transfer through pipes using the coupled Computational Fluid Dynamics and Discrete Element Method approach. Numerical simulations have been conducted to examine the modification of fluid thermal structure due to the presence of particles in a pneumatic transport pipeline. Modeled results have demonstrated the key role of transversal motion of rebounding particles in the pipe cross section in altering fluid temperature. Further implementation of this modeling technique in air-drying processes is discussed and possible experimental methods for the measurement of in situ particle and fluid motion and temperature profile are cited.     

Microwave heating synthesis of HgS and PbS nanocrystals in ethanol solvent

A novel route was developed to prepare PbS and HgS nanocrystals in ethanol solvent in the presence of sodium hydroxide by microwave heating method. PbS and HgS nanocrystals were obtained with an average size of approximately 10 and 6 nm, respectively. In the reaction, mercury acetate and lead acetate were used as mercury and lead source; sulfur powder was employed as chalcogenide source. The products were characterized by X-ray powder analysis (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV–Vis absorption spectroscopy. The probable mechanism was presented.