改性乳化沥青的发展和应用概况

综述了改性乳化沥青的发展及应用概况,重点讨论了改性乳化沥青的生产、制备工艺、稳定性影响因素,并对国内外改性乳化沥青的应用情况加以概述。     

ERP系统现状及其在国内铸造业中的应用

主要分析讨论了ERP的系统结构、设计方法、优化算法以及功能模块等问题，并对我国铸造业应用ERP系统的情况进行了综述和分析；最后，提出了在ERP实施过程中亟需解决的问题。     

Computational modelling of polymer electrolyte membrane (PEM) fuel cells: Challenges and opportunities

Fuel cells are still undergoing intense development, and the combination of new and optimized materials, improved product development, novel architectures, more efficient transport processes, and design optimization and integration are expected to lead to major gains in performance, efficiency, reliability, manufacturability and cost-effectiveness. Computational fuel cell engineering (CFCE) tools that allow systematic simulation, design and optimization of fuel cell systems would facilitate the integration of such advances, allow less heavy reliance on hardware prototyping, and reduce development cycles.     

梁柱组合节点的试验研究新进展

作为对Zandonini和da Silva等关于组合节点试验的早期综述的更新，本介绍了1997年以后的最新试验研究，并总结了组合节点在单调荷载和反复荷载作用下的破坏模式以及荷载形式、节点连接形式和节点域板的加劲方式对组合节点受力性能的影响。     

The hydrogen-fueled internal combustion engine: a technical review

A review is given of contemporary research on the hydrogen-fueled internal combustion engine. The emphasis is on light- to medium-duty engine research. We first describe hydrogen-engine fundamentals by examining the engine-specific properties of hydrogen and surveying the existing literature. Here it will be shown that, due to low volumetric efficiencies and frequent preignition combustion events, the power densities of premixed or port-fuel-injected hydrogen engines are diminished relative to gasoline-fueled engines. Significant progress has been made in the development of advanced hydrogen engines with improved power densities. We discuss several examples and their salient features. Finally, we consider the overall progress made and provide suggestions for future work.     

我国油田化学堵水调剖剂开发和应用现状

本文分八大类简述了国内各种堵水调剖剂的性能，研究及应用简况，对今后堵水调剖剂的研究提出建议。     

石油沥青质的化学和物理─Ⅰ石油沥青质的定义和分离

石油沥青质是最重要的石油组分之一，它在石油的勘探、开发、储运、加工及重质石油产品利用方面有着重要作用．本文论述了石油沥青质的含义及分布沥青质的各种方法，详细讨论了使用溶剂分离沥青质的理论基础和各种影响因素。     

冲压加工的新技术

产品的不断更新推动了塑性加工业持续发展，冲压技术获得了巨大的进步。本文介绍的复合冲压、微细冲压、智能化冲压、绿色冲压就是有力的例证。     

Analysis of sulphonamide residues in edible animal products: A review

The methods of analysis for sulphonamide residues in edible animal products are reviewed. Sulphonamides are widely used for therapeutic and prophylactic purposes in both humans and animals, sometimes as growth promoters as additives in animal feed. As a result of their widespread use, there is concern about whether the levels used of these drugs can generate serious problems in human health, e.g., allergic or toxic reactions. Several methods for the determination of sulphonamides have been reported in the literature and this review considers high-performance liquid chromatography (HPLC), liquid chromatography-mass spectrometry (LC/MS), gas chromatography (GC), thin-layer chromatography (TLC), high-performance capillary electrophoresis (HPCE), enzyme-linked immunosorbant assay (ELISA), biosensor immunoassay (BIA) and microbiological methods. Specific aspects of analysing sulphonamides, such as sample handling, chromatographic conditions and detection methods are discussed. Methods for drug residue monitoring should be accurate, simple, economical in both time and cost, and capable of detecting residues below the maximum residue limits (MRL). The current sulphonamide detection technologies are based on chromatographic methods or bacteriological growth inhibition. The instrumental methods such as HPLC and GC are both sensitive and specific, but are laborious and expensive. Because of the labour-intensive processes, only a few cases of GC methods applied to residue analysis have been published. These methods are suitable for confirmation but not for screening of large numbers of samples. Microbiological methods do not require highly specialized and expensive equipment. They also use highly homogeneous cell populations for testing and thus result in better assay precision. Although HPCE has powerful separation ability, the precision is poor and the instrument still needs to be improved. To date, this technique has not been widely applied to routine analysis. Currently, TLC has been almost replaced by other instrumental analysis. A rapid, sensitive and specific assay is required to detect positive samples in routine analysis, which can then be confirmed for the presence of sulphonamides by HPLC. Immunochemical methods such as ELISA can be simple, rapid and cost-effective, with enough sensitivity and specificity to detect small molecules. This review can be considered as a basis for further research aimed at identifying the most efficient approaches.     

提高复杂电子产品设计评审质量的方法

本文从设计评审的重要性、评审准备、评审的实施、评审后续工作等方面论述了提高复杂电子产品设计评审质量的方法.