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- Research on geochemistry background value for subsurface water in Shanghai 上海市浅层地下水环境地球化学背景值研究
- Keywords subsurface water;geochemistry background value;NH4 - N;NO2;NO3;synthetic organic pollution; 浅层地下水;地球化学背景值;氨氮离子;亚硝酸根离子;硝酸根离子;综合性有机类污染;
- geochemistry background value 地球化学背景值
- The sources, background value, environmental geochemistry features of fluorine, and its biological effects on animals, plants and human beings were reviewed. 阐述了环境中氟污染的来源、本底值和氟的主要环境地球化学特征及氟对植物、动物和人机体的生物效应。
- The investigation includes microelement background value and combination law of road dusts in element character of geochemistry. 路面积尘微量元素地球化学特征研究包括元素背景值和组合规律研究。
- geochemical background value 地球化学背景值
- Geochemical background values for the soil in the Songjia region, Yibin, Sichuan and their significance 宜宾市宋家地区土壤元素背景值研究及其意义
- The Pb accumulation concentration in the ring set was less than the background value in soil. 年轮序列中Pb的积累浓度低于土壤背景值;
- Cobalt background value is distributed in an apparent and regular order vertically and horizontally. 由于成土母质母岩的不同，土壤中的钴背景值有明显的差异；
- The Middle Cambrian Tianpeng Formation has high background value of metallogenetic element, which is the advantageous ore source horizon. 田蓬组地层成矿元素高背景值,为有利之矿源层。
- According to the strata about the trace elements in coal of China,the different background value of trace elements in different parts of China were d rew out. 由于分析样品分布不均和采用的测试方法各不相同,本文的数据还不能准确地代表中国煤中微量元素的平均丰度值。
- As a gray exponential model with distortions, the precision of GM(1,1) depends on the conformation of background value and the selection of original condition. 摘要GM(1,1)模型是有偏差的灰指数模型，其精度取决于背景值的构造形式和初始条件的选取。
- Examples show that the new formula to calculate background valu e of non-equidistance series makes GM(1,1) model have a very high fitting and f orecasting precision. 实例说明，重构的背景值计算公式用于非等间距序列有很高的拟合和预测精度。
- A variation trend has been pointed out in this paper that the geochemical background field descends gradually (i.e. high background field exists in the bas... 烃类湿度系数呈现西干东湿的变化趋势。主要含油气盆地地球化学场与地热梯度具有明显的相关性,揭示了两者间的成因关系。
- Rocks formed by underground water genetic type of geomorphology, the characteristics of meteorology are the main factors controlling the background value of environment of iodine clement and the content of iodine in water. 影响地下水形成的岩石、地貌成因形态类型、气象等,是制约碘元素的环境背景值及其水中碘含量的主要因素。
- On basis of a great number of the analysis da-ta of soil samples, the distribution trend of background value and the main effecting factor of Ti, Zr. Hf. Ta in different soil types and regions were discussed in this paper. 在大量土壤样品分析数据的基础上;讨论了钛、锆、铪和钽在不同土类和地区的环境背景值的分布趋势和主要影响因素.
- The Background Values and Distribution of As and Cr in Main Grains in shaanxi Area. 陕西地区主要粮食作物中砷、铬元素背景值及其分布
- The geochemical field of the Hefei Basin belongs to that of low background values, low moisture and inhomogeneity. 合肥盆地地球化学空间场属低背景、低湿度和非均匀场范畴。
- Soil cobalt background values are high in middle and northwest part of Yunnan province. 土壤钴背景值在澳中和澳西北局部地区较高。
- A little crack detracts from the value of the vase. 小小的裂痕减损那个花瓶的价值。
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
