共查询到20条相似文献,搜索用时 125 毫秒
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当前,国际、国内市场黄金价格的"断崖式"下跌,黄金矿山生产经营压力日益加剧,而市场原材料价格和劳动力成本上升等因素直接推升矿山生产经营成本"跳跃式"上涨,矿山赢利空间受到双重挤压承压力下降,亏损风险持续扩大。黄金矿山的管理者们为保证企业生存与发展,必须努力探寻降低成本的措施和方法。以陕西太白黄金矿业有限责任公司为实例,对黄金矿山企业降本增效的途径进行阐述,以为其他黄金矿山生产经营者提供借鉴和参考。 相似文献
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浅谈黄金矿山实行股份制王志学,闯绍铭(长春邮电学院)(长春冶金地质专科学校)黄金是现代工业生产不可缺少的贵金属,黄金生产离不开黄金矿山。黄金矿山是发展黄金事业的基础,是创造社会财富、繁荣国民经济不可缺少的重要组成部分。因此,如何加强黄金矿山管理,提高... 相似文献
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论述了中国黄金尾矿的二次资源价值和可利用性,总结了黄金尾矿综合开发利用的现状、途径,并依据黄金矿山尾矿的特点,对未来发展趋势进行了分析和预测。说明了尾矿资源回收对缓解黄金资源短缺,延长黄金矿山服务年限,将起到重要作用;综合开发利用黄金尾矿.不仅可以减少尾矿对环境的影响和危害,而且还可以获得良好的经济效益、环境效益和社会效益;提出了减量、再用、循环和复垦是矿山可持续发展,解决尾矿问题的根本出路,有助于推动中国黄金尾矿资源综合开发与利用工作的开展。 相似文献
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为作好引进新技术、新设备的消化吸收工作,由中国黄金总公司和美国瓦格纳采矿设备公司共同召开的瓦格纳产品研讨会于一九八九年七月二十七日至二十九日在北京昆仑饭店召开。中国黄金总公司、冶金部进出口公司二处、长春黄金研究所、山东省和吉林省黄金公司、内蒙赤峰市黄金局、烟台黄金机械厂以及有关使用瓦格纳公司设备的黄金矿山代表参加了会议。 会上,美方瓦格纳公司代表主要介绍了我国黄金矿山所引进该公司的设备的情况。主要是地下矿用铲运机,我国黄金矿山目前先后引进了该公司的 相似文献
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M Bofill M Lipman JE McLaughlin MA Johnson LW Poulter 《Canadian Metallurgical Quarterly》1998,11(3):548-553
Continuing care: developing a policy analysis for nursing Many authors have commented on the invisibility of nursing in policy development, implementation and analysis. Some of this invisibility may be attributed to the lack of an easily accessible framework to assist analysis of policy from a nursing perspective. In this paper we offer a framework for nursing policy analysis based on the domain concepts of nursing. We use continuing care for older people, a topical policy issue and fundamental nursing specialty, as a case study to demonstrate the utility and potential of such a framework in action. The resulting analysis helps identify areas of potential policy interest to nurses, raises questions for further policy analysis and offers a coherent position statement for action. 相似文献
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对现场在线仪器分析质量控制中的A、B、C管理进行了详细介绍,主要包括A、B、C管理的概念、目的以及执行过程。A管理的主要目的是对仪器分析的短期精密度(即短期漂移)进行管理,通过观察标准样品均值x以及平行测定标准样品分析值波动程度R的变动,来实现对分析仪器精密度的监控,也称仪器的漂移校正管理或标准化管理。控制同一分析室内同类分析仪器分析值间的偏差程度,防止在生产过程中因两台仪器切换分析时,出现系列生产样分析值不相衔接等情况的发生,使现场两台同类型仪器的分析值基本一致,将两台同类型的仪器进行对照分析并校正到相互基本一致的工作,称为B管理。将仪器分析值与化学分析值或更高一级别的分析方法测定值进行系统比较,并校正到与化学值基本一致的工作,称为C管理。ABC管理对现场仪器分析的质量控制具有良好的管理及指导作用。 相似文献
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介绍了中间包内钢液流动特性分析模型的研究进展,针对中间包内钢液的去夹杂流动特性,论述了典型的单、多流中间包去夹杂流动特性分析模型,并通过对比分析找出了较优的单、多流中间包去夹杂流动特性分析模型。对于多流中间包内钢液的流动特性,不仅要考虑非金属夹杂物的去除,还要考虑多流中间包内各流流动特性的一致性,对比分析了典型各流流动特性一致性分析模型的特点并找出了合适的分析模型。所找到的合理的去夹杂及各流流动特性一致性分析模型为中间包内钢液流动特性分析提供了理论依据。 相似文献
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钛合金中钒元素看谱分析方法研究 总被引:1,自引:1,他引:0
使用光栅看谱镜和棱镜看谱镜研究了钛合金中V元素看谱分析用可见光谱线特征,计算机模拟了V和Ti元素的可见光谱图,摄制了彩色图谱.研究了钛合金中V元素的V437.92 nm、V459.41 nm和 V485.15 nm等分析谱线组的特征,给出了分析用谱图和半定量分析用强度标志.研究了钛合金中V元素的看谱分析方法,进行了牌号鉴别应用研究.结果可用于钛合金和其他合金中V元素的定性分析、半定量分析,满足生产现场材料牌号鉴别的需要. 相似文献
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Traditionally, analyses developed for circular piles have also been used for rectangular piles by replacing in calculations the rectangular pile with a circular pile of equivalent area. In this paper, we present a settlement analysis that applies to piles with either rectangular or circular cross sections installed in multilayered soil deposits. The analysis follows from the solution of the differential equations governing the displacements of the pile-soil system obtained using variational principles. The input parameters needed for the analysis are the pile geometry and the elastic constants of the soil and pile. Pile displacements and vertical soil displacements calculated using this analysis match well those from finite-element analysis. A parametric study highlights some important insights for rectangular and circular piles in multilayered soil. A user-friendly spreadsheet program (ALPAXL) was developed to facilitate the use of the analysis. Examples illustrate the use of the analysis in design. 相似文献
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Most steel plant laboratories in the Benelux-countries are equipped with ICP-AES and AA-spectrometers dedicated to the analysis of samples in solution, mainly for the quantitative determinations of cations. These methods, however, are hardly suitable for the analysis of anions; hence, the interest in applying the ion chromatography method for the determination of these ions. The “Centre de Recherches Métallurgiques” studied different applications of ion chromatography (I.C.) in steel industry laboratories. In this paper, four major applications of this technique are described: analysis of waste waters, determination of the anions in surface treatment baths, analysis of rolling mill coolants, and analysis of sulphur in steel. 相似文献
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IR Walpole DA Kool T Edkins R Creegan S Levitt ST Francis J Goldblatt 《Canadian Metallurgical Quarterly》1995,162(9):464-467
OBJECTIVE: To assess the provision of accurate pre-symptomatic genetic testing with DNA analysis and appropriate counselling for individuals and families known to be at high risk of developing familial adenomatous polyposis coli (FAP). PATIENTS AND METHODS: Thirty-one families with clinically and pathologically documented FAP were ascertained from the Western Australian Polyposis Registry. DNA was collected from over 200 individuals in these families to establish their genetic risk status for FAP, either by direct mutation analysis, or by linkage analysis. Individuals undergoing DNA testing were given intensive psychosocial support and counselling. RESULTS: In 19 families DNA-based counselling could not be offered because either the adenomatous polyposis coli (APC) gene mutation could not be detected or there were insufficient family members for linkage analysis. Gene testing yielded mutations of the APC gene in 87 individuals from 12 families; by gene tracking (or linkage analysis) in three families and by mutation analysis in the remaining nine (four of which had only one affected individual). DNA results conformed with a definite clinicopathological diagnosis in 27 FAP patients and, of the remaining 60 high-risk subjects tested, 14 had inherited the mutated APC gene. CONCLUSIONS: DNA analysis allowed accurate genetic counselling for 12 of 31 families affected by FAP, thus improving the medical and personal management in asymptomatic people who would otherwise be subjected to the uncertainty of long term surveillance and repeated colonic examinations. In future a superior biomolecular approach to gene mutation analysis, such as the protein truncation test, will facilitate management for most FAP individuals and families. 相似文献
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使用看谱镜计算机自动分析系统研究了铁基合金中钛元素看谱分析用可见光谱,模拟了Fe和Ti元素的可见光谱图,制作了数字化彩色图谱.研究了铁基合金中Ti元素的Ti499.95 nm、Ti551.25 nm和Ti489.99 nm等分析谱线组的特征,给出了分析用谱图和半定量分析用强度标志.研究了铁基合金中Ti元素的看谱分析方法.结果可用于铁基合金中Ti元素的定性分析、半定量分析和牌号鉴别. 相似文献