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证据权法在成熟矿区进行成矿远景预测的尝试——以山西灵丘支家地铅锌银矿为例 总被引:1,自引:0,他引:1
简要介绍了证据权模型的数学模型及GIS应用原理,尝试性地将该法引入到工作程度高的小范围矿区成矿预测工作中.在深入理解山西支家地矿区成矿特征基础上,通过了点阵化处理矿体、地质体的方法尝试性离散矿体和地质体,选取了符合条件的独立性控矿因子,优化提取了地层、线性构造,矿体和岩石界限等致矿证据层;以10 m×10 m为网格单元,分析了各证据层与矿体分布的空间相关性,定量计算了各证据层对矿化影响的对比值,使任意空间位置可能发生矿化的概率的计算成为可能,解释了各证据与成矿有利的相关程度,进而定量确定了该矿区各控矿因子对成矿有利程度,获得了断裂热液型矿体和隐爆角砾岩型矿体的成矿后验概率,并通过图形方式直观表达了成矿高概率区的空间分布,已知矿体与成矿高概率区有很高的吻合度,说明该方法在成熟矿区应用具有可行性. 相似文献
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介绍了小佟家堡子金矿床的区域地质概况、矿床地质概况、矿体地质特征和矿床类型。通过对小佟家堡子金矿床的围岩蚀变、矿体形态、规模、金属矿物组合等地质特征的研究提出了找矿标志。 相似文献
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为了在“全三脱”工艺流程中实现炉渣的高效循环利用,将[w((P2O5))]较低的热态脱碳炉终渣通过渣罐兑入脱磷炉继续发挥脱磷作用。分析结果表明,提高返回渣量及脱磷渣磷分配比均可显著降低脱磷炉石灰消耗量,当渣钢磷分配比及返回渣量控制合适时,脱磷炉可不加入石灰而使半钢磷质量分数达到目标值。对脱碳炉渣在脱磷炉冶炼中的再熔化过程进行计算分析,随着铁水中硅元素的氧化,脱碳渣碱度降低而不断熔化,逐渐发挥脱磷作用。在“全三脱”工艺流程中成功开发了转炉渣热态循环利用工艺,脱磷率提高约6%,返回脱碳渣加入量约为67.13 kg/t,石灰、轻烧白云石和萤石分别节约9.37、1.15 和2.45 kg/t,半钢温度提高约7 ℃。 相似文献
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针对赣南离子型稀土开发现状,根据环境保护“十五”计划实现低劣转化的要求,提出推广高新技术,强化清洁生产管理,引入绿色环保税制等措施,解决赣南稀土开发生态环境保护问题,促进资料优势向经济优势转化,走可持续发展道路。 相似文献
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在金的光度分析测定研究中,追溯其显色剂的源头,对研究金的光度分析进展具有重要意义;同时,对原有显色剂分子的改进,对分析功能团的修饰,新的分析显色体系的提出,以及合成或发现新显色剂,同样具有重要作用和诱人的前景。通过文献检索,找出了中国光度法测定金的70多种显色剂的研究和应用,并将其分类介绍,以期对该领域进一步探索、改进和开拓。 相似文献
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陈希颖 《中国稀土学报(英文版)》1992,(1)
Application of rare earth in steels has gone through three stages in China.The investigation of rare earthadding method begun at the late 1970's has solved the technical problems caused by rare earth addition.Controlling sulphide morphology,several rare earth treated steel grades with improved properties have been developedand put into production.Rare earth exerts remarkable effect on the performance of low sulphur steel and on thehydrogen behavior in steel.Rare earth used for surface treatment of iron and steel materials expands rare earthutilization. 相似文献
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Morteza N. Orang J. Scott Matyac Richard L. Snyder 《Canadian Metallurgical Quarterly》2008,134(1):96-100
Reliable information on irrigation methods is important for determining agricultural water demand trends. Therefore, a study was conducted during 2002 to collect information on irrigation methods that were used by growers to irrigate their crops in 2001. The results were compared to earlier surveys to assess trends in cropping and irrigation methods. A one-page questionnaire was developed to collect information on irrigated land by crop and irrigation methods. The questionnaire was mailed to 10,000 growers in California that were randomly selected from a list of 58,000 growers by the California Department of Food and Agriculture, excluding rice, dry-land, and livestock producers. From 1972 to 2002, the area planted has increased from 15 to 31% for orchards and from 6 to 16% for vineyards. The area planted to vegetables has remained relatively static, while that planted to field crops has declined from 67 to 42% of the irrigated area. The land irrigated by low-volume (drip and microsprinkler) irrigation has increased by about 33%, while the amount of land irrigated by surface methods has decreased by about 31%. Sprinkler usage has decreased in orchards and vineyards, but it has increased in vegetable crops. 相似文献
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近年来随着质量体系认证,实验室认可体系在中国不断展开,统计技术作为一种控制手段被应用于化验室检测控制。本文通过建立载金炭中金含量值的 x-R控制图,对检测数据进行统计分析,使检测结果得到有效控制。 相似文献
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