共查询到20条相似文献,搜索用时 125 毫秒
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本文简要概述了地质岩芯钻探技术的发展历程和作用,对其中复合型钻探技术、立轴岩心钻探技术以及全液压式钻探技术等重要技术的应用现状进行了分析,着重探讨了资源勘探中绳索取芯地质钻探技术以及连续反循环岩心钻探技术的应用,并对地质岩芯钻探技术未来在资源勘探中的应用前景做出了简要的分析。 相似文献
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对近年来荧光显微技术在土壤微生物可视化研究中的应用进行了综述,介绍了荧光显微镜技术、激光共聚焦技术、荧光原位杂交技术,并综合分析了各项技术的优缺点. 相似文献
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利用氧化铁皮烧结矿做炼钢氧化剂的探讨 总被引:3,自引:0,他引:3
用氧化铁皮研制烧结放代替铁矿石做炼钢氧化剂经试验表明,其理化性能均优于铁矿石,可替代铁矿石作为炼钢的氧化剂。氧化铁皮的开发利用,综合效益显著。 相似文献
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The purpose of this paper is to present a review of those studies using the F scale in substantially its original form which appeared in the literature between 1950 and 1955. The studies were grouped into five major categories: (a) ideology; (b) personality correlates; (c) interpersonal behavior; (d) cultural and sub-cultural variations; and (e) studies of the instrument. It was concluded that "many questions still remain to be answered before its (the F scale) use would have much meaning in terms of predicting human behavior." 64-item bibliography. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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热轧氧化铁皮的成因及去除方法 总被引:19,自引:1,他引:18
阐述了板坯热轧时形成氧化铁皮的原因、影响因素、铁皮的种类和组成。介绍了国内外板坯热轧时去除氧化铁皮的各种方法,以及各种除鳞设备和除鳞条件,并针对武钢生产高强度热轧板提出了改进建议。 相似文献
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In order to suppress the surface cracking induced by Cu during reheating and hot rolling process,Cu enrichment and its migration at the steel-scale interface was investigated during heating of steel cast at temperatures between 1000℃and 1200℃in N2-O2 and N7-H2O atmospheres.For oxidation of Cu containing steel,Cu enriched phase was formed by the preferential oxidation of Fe and the enrichment and migration behavior of Cu depends on the oxidation temperature,steel chemistry and atmosphere condition.Ni in steel induced the formation of solid Cu and Ni enriched phase at steel/scale interface and in scale layer and the formation of uneven steel/scale interface, which suppresses the Cu enrichment because of extrusion of Cu enriched region before the formation of liquid phase.On the other hand,Sn addition promotes the liquid Cu formation at steel/scale interface and penetration into grain boundary of Cu enriched phase by decreasing solidus temperature and solubility limit.In addition,for oxidation at 1 200℃,the behavior of Cu at and around the steel-scale interface was found dependent to a large extent on morphology of the oxide scale formed during oxidation.At the early stage of oxidation,Cu-rich phase formed and accumulated at the steel scale interface under both O2-N2 and H2O-N2 atmospheres.As the oxidation proceeded,however,Cu enrichment at and its migration from the steel-scale interface were vastly different for different oxidizing atmospheres.In the case of O2-N2 oxidation,an oxide layer formed initially at the steel surface, but soon after a gap was developed at the steel-scale interface and grew in its size,which practically separated the scale from the steel substrate.The scale layer formed under this condition was porous.The Cu-rich phase initially formed at the interface was found migrating to the scale layer,leaving no Cu-rich phase at the interface.In the case of H2O-N2 oxidation,however,the scale layer formed was dense and tightly attached to the steel surface,and the Cu rich-phase continued to accumulate at the interface.Regarding the behavior of Cu-rich phase formed at the interface,it is proposed with experimental evidences that,when a gap forms at the steel-scale interface,it is the vaporization of Cu in the Cu-rich phase through the gap that brings Cu to the scale. 相似文献
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介绍了微机核子秤的工作原理及其在冶金石灰多粉尘生产环境下的应用结果。应用表明,微机核了秤有足够的计量精度,可要满足冶金石灰生产配料工艺的要求。 相似文献
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广州电梯公司过去与全国所有“老国企”一样,从产品技术到经济规模都处于较低水平,通过“招商引资”使企业的产品技术水平紧跟世界先进水平,不断推动企业发展。 相似文献
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