高转速钻进时金刚石钻头磨损的试验研究进展

讨论了金刚石钻进中提高机械钻速和降低钻探磨损问题 ;探讨了这两个技术指标与钻压、转速的关系 ;提出了表示机械钻速和钻头胎体磨损关系的钻探效果指标 ,并根据后者确定出了规程参数最优值     

莱芜市莱城区城乡建设用地增减挂钩工作初探

对当前正在实施的城乡建设用地增减挂钩现状及政策进行分析,认为当前大多数地方开展增减挂钩工作认识存在偏差,由于资金拨付不到位等原因,导致工作进展的不平衡性比较突出。对增减挂钩工作中存在的问题进行剖析,并提出相应的对策建议。     

寻找降雹预报指标集的一种方法:逐步消空法

对于用逐步消空法寻找降雹预报指标集合 ,例如 :寻找指标的步骤 ,从何处入手寻找预报指标 ,预报指标的确认 ,预报指标的总个数等有关问题进行了讨论。     

A relation between abrasiveness and quartz content for some Coal Measures sediments

Conclusions 1. For a limited range of Coal Measures sediments, it has been shown that a good relation exists between the abrasiveness of the rocks and their quartz content.2. In this instance it was not possible to make any correlation with cutter wear, but it would be expected from the above result that the higher the quartz content of the rock the greater would be the wear on the cutters.     

含碳化钨硬相的镍基涂层泥浆泵缸套研究

５＃钢泥浆泵缸套内工作表面，以碳化钨硬相镍基涂层进行真空熔烧强化处理，大幅度提高了缺套的耐磨料磨损性能。对涂层的显微组织结构及机械性能进行了试验分析，并给出了涂层缸套现场使用的试验结果     

弱包镶强耐磨性胎体钻头

在分析钻进时钻头“打滑”原因的基础上,提出了利用弱包镶来解决“打滑”思路。本文介绍了弱包镶强耐磨性胎体钻头的基本原理及使用效果。     

陶瓷材料在热机钻头上的应用研究

通过选用几种陶瓷材料的试验，证明了陶瓷材料在热机钻头上的应用是可行的，同时利用热压工艺将陶瓷固定在钻头体上是可靠的。陶瓷摩擦材料耐磨性是硬质合金的2．8倍，而其成本仅是硬质合金的1／10。     

聚凝体深部液流转向技术研究与实践

阐述了聚凝体深部液流转向技术的作用机理，及将其应用于长期注水开发的羊三木油田，阻止注入水沿注采井窜流的应用成果．聚凝体是一种聚合物的凝胶体．该技术利用了聚凝体的弹性变形特性，研究其在油层多孔介质中可流动特征及其封堵大孔道产生的液流转向能力．在此基础上，完成了羊三木油田一断块丛14、丛19井深部液流转向现场试验，取得了增油降水的效果，在技术和经济上都取得了成功。     

Wardrobe matter: the sorting, displacement and circulation of women's clothing

This paper develops a reading of the wardrobe which emphasises the wardrobe's location within the consumption practices of tidying, sorting and the displacement of clothing. Its emphasis is on the circulation of clothing matter and the transience of clothing consumption, not––as recent accounts have stressed––the accumulation, collection and wearing of clothing. Using primarily the example of maternity wear, the paper outlines how clothing matter circulates amongst and between women (between siblings, between friends and amongst neighbours and acquaintances) and accounts for this practice. It argues that maternity wear circulation is both an embodied divestment/recovery ritual and about the making of mothers, through its appeal to thrift, sacrifice and making-do. The paper concludes by reflecting on the significance of the absence of maternity wear from women's wardrobes and by suggesting that wardrobes need to be thought of not just as containers of memory, but as temporary holding places in the lives of clothes, and as pivotally positioned as a fulcrum for clothing movement, between wearing, storage and displacement.     

A mixed-feeding Equus species from the Middle Pleistocene of South Africa

The dietary regime of Equus capensis from the Middle Pleistocene of South Africa is investigated by mesowear analysis. Results indicate that the mesowear signature of this species resembles that of two extant mixed feeders, the Grant's Gazelle (Gazella granti) and the Thomson's Gazelle (Gazella thomsoni), suggesting a mixed feeding dietary strategy for E. capensis. The mesowear signature of a contemporaneous population of Equus mosbachensis from Europe (Arago, France) is also determined for comparative purposes and has a typical grazing signature. In general, all extant species of Equus are believed to be almost exclusively grazers. However, a considerable degree of dietary flexibility is recently reported. The dietary signal of E. capensis is considered to be the result of feeding on the unique fynbos vegetation, which was beginning to establish itself at this time in southwestern South Africa. Grasses are a minor component of this floral kingdom. Our findings thus provide further evidence for the unexpected flexibility in feeding strategies of Equus, the most widely distributed equid taxon in the Quaternary. They highlight the potential use of the attrition–abrasion wear equilibrium as a habitat indicator, by mirroring the availability of food items in mammalian herbivore ecosystems.