| 1. | Enrichment and release of uranium during weathering of sedimentary rocks in wujiang catchments 乌江流域沉积岩风化过程中铀的富集与释放 |
| 2. | Many common minerals , such as feldspar , develop microscopic pits during weathering 许多常见矿物(例如长石)会在风化过程中发展出微小坑洞。 |
| 3. | The dissolution process with microstructural variation in marlite in three gorges reservoir area 三峡地区泥灰质岩石在岩溶和风化过程中力学性质的变化 |
| 4. | During the weathering of granite , groundwater from the granitoid weathering crust have special chemical compositions 花岗岩的风化过程,使其风化壳地下水具有比较特殊的水化学组成。 |
| 5. | In this thesis , we research into the geochemical data of the groundwater from the granitoid weathering crust of the fogang granite in baisha region , guangdong province 本文研究了广东省白沙地区花岗岩风化壳地下水的水化学特征,特别是与花岗岩的风化过程有关的稀土元素含量及其分布模式。 |
| 6. | The prevention and cure of the spilt oils pollution is an important task of the protection of marine environment . the study of the weathering of spilt oils is the base of the prediction and control of oil spills 溢油污染的防治是海洋环境保护的重要课题,而溢油的预测和控制的基础是对溢油风化过程的研究。 |
| 7. | The process of evaporation and emulsification , which are the most important in the weathering of spilt oils , has been studied in this thesis . a weathering prediction model , which will be an important tool in oil spill contingency reaction , has also been developed 本文深入研究了海上溢油蒸发和乳化这两个重要的风化过程的机理,并建立了溢油应急反应的重要工具? ?风化预测模型。 |
| 8. | The 0 . 28xl0 ~ _ ( 9 ) t carbon derived from atmospheric co _ ( 2 ) is transferred from atmosphere and biosphere to the ocean by surface rock weathering processes . in order to monitor the quality of the river , it is also important to understand the natural flux of dissolved ions 珠江流域3条主要支流的化学风化过程存在明显差异,西江和北江流基本以碳酸盐类溶解为主,而东江河水扣除大气降水的来源外,溶解质基本出自硅酸盐类的风化。 |
| 9. | The main conclusions are as follows : the hco3 - ion content of zhujiang river changes notably in one hydrological year , especially in wet season and dry season . as for the content of inorganic carbon , that of the xijiang river is the highest , then the beijiang river , and then the dongjiang river . the xijiang river ' s inorganic carbon source was major from karst process in the drainage basin 得出如下的结论:珠江水体hco _ 3 ~ -离子含量在一个水文年中发生显著变化,特别是丰水期与枯水期之间波动幅度较大;无机碳含量西江含量最高,其次是北江,东江最低;西江无机碳主要来源于岩溶作用,由于受河流冲刷效应影响,丰水期hco _ 3 ~ -离子含量升高;东江流域无机碳主要来源于硅酸盐岩的碳酸盐风化过程,丰水期hco _ 3 ~ -离子含量无显著变化;北江无机碳来源于岩溶作用和硅酸盐岩的碳酸盐风化过程,受稀释效应影响,无机碳含量随水量增加而降低。 |
| 10. | The evaporation of some oils and their emulsifies was modeled with pan evaporation method , and the characteristics of the evaporation in different states was inspected . the equations of evaporation rate and the factors of inhibitory action of emulsification on evaporation have been obtained . the dynamics mechanism of emulsification has been discussed based on the observation and analysis of the characteristics of oil and water motion 本文主要是从目前研究的薄弱环节作为研究突破口,用浅盘蒸发法对原油及其乳化物的蒸发进行模拟,考察不同原油在不同阶段和乳化状态下的蒸发特征,得出蒸发速率方程及乳化对蒸发抑制作用因子;观测和分析油水运动规律,分析乳化动力学过程;以组成和状态是决定风化特征的主要因素和联系各风化过程的纽带这一思想为基础建立溢油风化预测模型。 |