| 1. | Soil quality - guidance on the determination of background values
土壤质量.基本值测定指南 |
| 2. | Soil quality - guidance on the determination of background values
土壤质量.基本值测定指南 |
| 3. | Analyze the defect of gray prediction formula , and point out the structure of background value ha ' s an important influence on the precision
对gm ( 1 ， 1 )模型中背景值的计算方法进行改进，这种改进使模型具有对建模结果进行优化的能力。 |
| 4. | In the campania region , baseline and background values are often coincident , where the samples represent catchment basins away from urban or industrial areas
在坎帕尼亚地区，样品代表的是远离市区或者工业区的汇水盆地，所以基线值和背景值经常是吻合的。 |
| 5. | 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。 |
| 6. | As shown by the experimental results , the treatment either with phosphoric acid or by heating with microwave , the interference of high background values was effectively eliminated
试验结果显示，或用磷酸处理，或经微波加热处理，均能有效消除高背景的干扰。 |
| 7. | This paper systemically contrasts and analyses the background value and its distribution , the relationship between element enrichment and ore - foming of the four units
依据1 ： 20万水系沉积物测量数据，对比分析了主要成矿元素在整个成矿带及4个构造单元的背景值、元素的空间分布规律、元素富集特征及其与成矿的关系等。 |
| 8. | From the point of view , a new calculation formula of background value is proposed , and the improvement could make the gray model have the ability to optimize the modeling so as to obtain the optimal results
同时引入概率论的知识，并结合马尔可夫模型动态的预测将来各年的经营状况以及各种状况的概率，以提高预测的精确性。 |
| 9. | ( 5 ) in some regions covered by black shales continuously , black shales weathering might be the cause of variations of regional background values , thus the cause of some endemics and other geochemical diseases
( 5 )在黑色页岩连续分布区内，黑色页岩风化、区域元素背景值、地克病等地球化学病症三者之间具有某种程度的因果关系。 |
| 10. | According to character of the magnetic data and susceptibility observation values , the thesis analyzes and deals with them by some reasonable methods , for instance the wavelet eliminating noise , the stepwise separated operator separating regional and local magnetic field , the foreboded statistics method distilling susceptibility background value
处理磁测和磁化率观测值时，给出的多种合适的方法(如小波去噪方法、分离区域磁场和油气局部磁场的逐次分离算子以及提取黄土磁化率背景值的先验统计提取法等)使数据的有效性显著提高。 |
