共查询到20条相似文献,搜索用时 78 毫秒
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矿体的统计特征是矿体数学特征的重要内容之一,是数学地质应用与发展的基础。通过对玲珑脉状金矿品位及厚度标志值变化特征的统计分析与研究,建立了该类型矿体的品位统计分布模型,并试图通过各种统计特征数据、定性与定量地反映矿床形成特点,为隐伏矿体预测提供信息。 相似文献
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将云南优质、富锰矿的成因类型初步划分为3个大类8个亚类,概述了各类型锰矿床的基本地质特征及优质、富锰矿的控矿因素,指出沉积—变质(改造)型锰矿是云南优质、富锰矿的主要类型和找矿重点。强调加强基础地质工作,注重岩相古地理研究,推行中、大比例尺成矿预测,是使云南优质、富锰矿找矿取得突破和提高找矿效果的捷径。 相似文献
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文章从地层、构造和岩浆岩等地质特征入手,通过对与稀土矿成矿关系密切的风化壳发育特征、成矿母岩岩石特征和土壤地球化学特征,以及与成矿有关的地形地貌、气候和构造因素等条件进行稀土矿成矿潜力综合分析,系统总结了稀土矿成因、类型,在此基础上,对清流县温郊至长校一带稀土矿资源进行预测并提出工作建议,为今后在该地区开展稀土矿勘查工作提供可靠的地质依据。 相似文献
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黄铁矿成分标型是矿物最本质的特征因素,融合了众多成因及找矿的关键信息,可为成矿预测及找矿实践提供矿物学的特征参数。在以往研究基础上,以全国各典型的成因类型及亚类型金矿床主成矿期黄铁矿为研究对象,引入经过标准化的蛛网图分析主微量元素的平均含量,以更好的区分各成因类型金矿床,并运用δFe-δS投图方法、Co-Ni-As质量三角图分析主微量元素成分标型特征,从而提取最重要的矿床成因和找矿信息。结果表明:经过标准化处理的主微量元素蛛网图,其标准化值及元素演化趋势可有效识别不同类型金矿床,且δFe-δS、Co-Ni-As均具有良好的分区特征,可反映不同成因类型金矿床的标型差异,对于深化认知矿床成因、找矿勘探具有重要的现实参考意义。 相似文献
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平邑卓家庄金矿作为目前国内矿产资源最丰富的隐爆角砾金矿床,主要分布于NW向与EW向两者断裂交汇之地,具备高金品质(平均100×10-6以上)与全筒式矿化等特征。且金属矿矿石包含了破碎岩、震碎角砾岩以及隐爆角砾岩等类型矿石。但为了能够对该金矿进行精准开发,就需要对卓家庄金矿的地质特征、成矿规律与要求等进行研究分析,以为成矿预测勘察奠定基础。基于此,本文首先分析了典型矿床系统的结构与形成要素,借助从成矿预测角度,对平邑卓家庄的金矿地质特征进行全面分析,提出了金矿成矿预测勘察措施。以期为提高金矿资源开发质量提供相应的参考。 相似文献
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WL Weston 《Canadian Metallurgical Quarterly》1976,37(5):346-352
Delayed type (Type IV) hypersensitivity is commonly manifested in clinical practice as allergic eczematous contact dermatitis (AECD). This reaction can be transferred by lymphoid cells but not serum and parallels other T lymphocyte immune responses. Recent evidence correlates the sensitization phase of AECD with in vitro lymphocyte transformation and the elicitation phase with lymphokine activity. Although a bewildering variety of haptens may be responsible for AECD, they have in common an ability to form co-valent bonds with proteins. Patch testing with the offending antigen will reproduce the disease. Therapy of choice remains topical or systemic corticosteroids. 相似文献
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王学斌 《湖南冶金职业技术学院学报》2007,7(3)
设0<p<∞,α>-1,Dpα表示单位圆盘△上满足∫△(1-|z|2)a|f'(z)|pdm(z)<∞的解析函数全体,对所有0<p<q<∞.,得到了Dpα到Dqβ的乘子的充要条件. 相似文献
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王学斌 《湖南冶金职业技术学院学报》2007,7(3):134-136
设0〈ρ〈∞,α〉-1,D^ρα表示单位圆盘△上满足∫△(1-|z|^2)α|f′(z)|^ρdm(z)〈∞的解析函数全体,对所有0〈ρ〈q〈∞.,得到了D^ρα到D^qβ的乘子的充要条件。 相似文献
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Errors in research do occur. Their prevalence should be viewed with alarm rather than passive acceptance as an essential concomitant of humans conducting research. The author looks at the discussion of errors in an article by Leroy Wolins (Amer. Psychologist, 1962, 17, 657-658) and an article by Emanuel Berger (Amer. Psychologist, 1962, 17, 657). The first article suggests that we may be quite unaware of the large proportion of the iceberg (erroneous research results) which is never perceived or reanalyzed. The second article pleads for experimental evaluation of research results. It would seem as though these two articles are both positively and negatively related. On the one hand, subjective evaluation and interpretation of research results may possibly expose inadvertent errors in computations (or in design, sampling, etc.). Thus, results which do not readily blend with an already established nomological network might call for statistical recomputations. On the other hand, subjective evaluation can become quite blinding when one identifies with or strongly favors certain results. In such cases, errors in computation would never be suspected, much less discovered. The author discusses experimental errors further, taking a look at Type I and Type II bias. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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新型轻合金主要包括铝合金、镁合金和钛合金,具有密度小、强度适中的优点.对交通运输、国防高技术和武器装备等的发展尤为重要.本文主要介绍这些新型轻合金在实际的应用现状和发展前景. 相似文献
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铜管-管壳式换热器的设计 总被引:1,自引:0,他引:1
从铜管-管壳式换热器中铜管与管板连接时的受力情况同钢制管壳式换热器中钢管与管板连接时的受力情况的。区别及钢管-管壳式换热器的特点出发。提出铜管-管壳式换热器的设计方法。 相似文献
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介绍了孔洞式滑块在小型推钢式连续加热炉中的应用以及运行的效果。指出采用孔洞式滑块可降低能耗,提高炉子热效率,减少设备故障率,提高成材率。 相似文献
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M And?l P Kucera L Treslová J Perusicová V Karlová A Richterová J Potocková 《Canadian Metallurgical Quarterly》1998,44(4):232-236
We present the case of an adult patient with growth hormone (GH) insufficiency and hereditary motor and sensory neuropathy type 1. Stopping GH replacement at the attainment of final height was associated with a marked reduction in power and mobility, resulting in the patient becoming wheelchair bound. GH replacement was assessed in a double-blind placebo-controlled trial. During the GH replacement arm of the trial, the patient's mobility and independence returned to previous levels. We suggest that the indications for GH replacement in adults should take account of other medical problems, in particular neuromuscular disorders, as well as the degree of GH deficiency. 相似文献