我国矿业城市实现可持续发展的途径分析

详细分析我国矿业城市可持续发展所面临的社会、经济、资源和生态环境等问题，提出了我国矿业城市应树立可持续发展目标及其内涵，系统分析矿业城市可持续发展的结构和模式，结合我国矿业城市发展存在的主要问题，以矿业城市可持续发展理念为指导，提出我国矿业城市实现可持续发展的途径及其建议。     

高合金钢铸造用涂料的试制与开发

介绍了炉爪用合金钢1Cr25Ni20Si2Re,导板用合金钢2Cr32Ni5采用串箱铸造过程中，有关镁砂粉涂料和石英粉涂料的试制。结果表明：镁砂粉涂料为不透气涂料，不太适用，而合理配方的石英粉涂料使用性能良好。     

Metric-based reasoning about pseudocode design in the partial metrics system

The goal of the PMS project is to produce an environment in which the intelligent online assessment of the design for large-scale ADA programming projects is provided. The focus is on the representation of knowledge about the design process for an individual module. Changes in pseudocode complexity are measured in terms of partial metrics. These metrics can take the designers inferences about the pseudocode program structure into account when assessing module complexity. Next, a model of the stepwise refinement process is given which demonstrates how pseudocode elaboration decisions can be modelled in partial metric terms. Finally, the decisions associated with each refinement step for 17 example refinements taken from the computer science literature are described using partial metrics.     

输气管道天然气连续取样器的研制及应用

文章针对国内管输天然气气质分析工作中取样环节所存在的问题，结合国外技术发展趋势，全面地介绍了输气管道天然气连续取样器的研制过程。实践证明，该装置较好地解决了天然气密度值偏差问题，满足管输天然气全分析的要求，同时，该装置的推广应用将会提高天然气的计量准确度。     

浅谈托辊的开发与实践

本钢１７００连轧机应用的托辊原由外企业制作，为了减少公司资金外流，公司技术人员和工人结合现有的生产条件，先后攻克了辊身铸造和加工，托辊装配等工艺方面的难关，研制成功了合格的产品，年创经济效益８０万元。     

A Refinement Calculus for Shared-Variable Parallel and Distributed Programming

Parallel computers have not yet had the expected impact on mainstream computing. Parallelism adds a level of complexity to the programming task that makes it very error-prone. Moreover, a large variety of very different parallel architectures exists. Porting an implementation from one machine to another may require substantial changes. This paper addresses some of these problems by developing a formal basis for the design of parallel programs in the form of a refinement calculus. The calculus allows the stepwise formal derivation of an abstract, low-level implementation from a trusted, high-level specification. The calculus thus helps structuring and documenting the development process. Portability is increased, because the introduction of a machine-dependent feature can be located in the refinement tree. Development efforts above this point in the tree are independent of that feature and are thus reusable. Moreover, the discovery of new, possibly more efficient solutions is facilitated. Last but not least, programs are correct by construction, which obviates the need for difficult debugging. Our programming/specification notation supports fair parallelism, shared-variable and message-passing concurrency, local variables and channels. The calculus rests on a compositional trace semantics that treats shared-variable and message-passing concurrency uniformly. The refinement relation combines a context-sensitive notion of trace inclusion and assumption-commitment reasoning to achieve compositionality. The calculus straddles both concurrency paradigms, that is, a shared-variable program can be refined into a distributed, message-passing program and vice versa. Received July 2001 / Accepted in revised form May 2002     

地震资料精细处理和解释在徐家围子油田的应用

以地震资料精细处理和解释在大庆长垣外围徐家围子油田开发中的成功应用为例，论述了地震地质综合描述技术在地质情况复杂的低、特低渗透油田开发中的应用效果。     

汽车用焊接钢管的发展

介绍了汽车用焊接钢和产品品种，国内皮类管的生产现状及市场需求状况；国外汽车用焊管最新发展情况。建议国内汽车用焊管应该是定点供料，定点生产，设备配套，完善工艺，建立从炼钢，轧制到制管的质量管理体制。     

珠江口门海堤堤型的选择

珠江口站地区面临南海、大陆岸线长４５７ｋｍ，遭受洪水。潮汐、台风的影响，河口滩涂 发育迅速，以约１００ｍ／ａ的速度向大海延伸。随着沿海地区的经济发展，滨海－２ｍ高程以上的滩涂的４万ｈｍ＾２正在和将要建堤围垦和开发利用，原有海堤也亟待加固提高，因此，对珠江口门坝有海堤堤型资料进行收集、整理，分析总结，选择经济可行的海堤堤型，具有重要的现实意义。文中收集了珠江口门的几种主要堤型，通过对各种堤基工程地质