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- The Natural Background Value and Characteristics of Trace Element in Plants of the Qinghai Lake Region 青海湖地区植物微量元素自然背景值及其特征
- natural background value 自然本底值
- Study of the Natural Background Values of Cr and HgElement in Thousand-Mountains Soil 千山土壤中铬、汞微量元素的自然背景值研究
- 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;
- The results show that the radioactivity level of varied water bod-ies of the city was within normal natural background. 调查结果表明,上海市各类水体中天然放射性核素浓度属正常本底水平。
- 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 results show that the radioactivity level of variedwater bodies of the province was within normal natural background. 调查结果表明,全区绝大部分水体中天然放射性核素浓度属正常本底水平,个别水样核素浓度偏高。
- 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。
- There are 575 deluxe rooms of various styles in the 550 mu tropic plants garden of the hotel, preparing amazing natural background for this picture-like resort. 酒店现有575间风格迥异的豪华客房点缀于550亩的热带植物花园中,为这一风景如画的仙游圣地平铺了靓丽的天然底色。
- 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。
- On the whole, cities enjoyed good acoustic environment and radioactivity pollution maintained at natural background level. The total amount of arable land was on decline. 城市声环境质量较好,辐射环境质量基本维持在天然本底水平。
- When natural background sounds, like the engine tickover of a parked car, were added, the hybrids' direction sometimes could not be detected until they were perilously close. 如果添加诸如停车时发动机的空转此类自然背景音,有时混合型汽车的方向在危险距离之前根本无从判断。
- 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。
- The rates of extinction of local species that accompany these rapid changes in land cover may soon be far in excess of what is found today,reaching as high as 10,000 times the natural background rate. 伴随着这些士地覆盖的迅速变化,当地物种灭绝的速率可能很快便大大超过了我们今天所发现的,达到自然的1万倍。
- The rates of extinction of local species that accompany these rapid changes in land cover may soon be far in excess of what is found today, reaching as high as 10, 000 times the natural background rate. 伴随着这些士地覆盖的迅速变化,当地物种灭绝的速率可能很快便大大超过了我们今天所发现的,达到自然的1万倍。
- In this paper, an algorithm based on watershed transformation and fuzzy logical catchment basins combination is proposed to suppress or remove the feature of natural background, and applied to infrared object boundary detection and labeling. 文中在分水岭算法的基础上,结合模糊逻辑方法,对自然背景下的红外人工目标的边界检测和分割以及红外背景的抑制进行了探讨。
- 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。