|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Internal wave parameters retrieval from space-borne SAR image显示文摘基于散布成像的成像机制和微波为海洋的表面特征建模的海洋的内部波浪 SAR,我们开发了一个新方法从 SAR 形象提取内部波浪参数。第一,起始的风地从 NCEP 分析数据,海水密度和海洋的内部波浪被导出 pycnocline 深度从利未夫数据被估计,内部波浪导致的表面水流根据 KDV 方程被计算。NRCS 侧面然后被解决行动平衡方程并且使用海表面雷达反散射模型模仿。风和内部波浪 pycnocline 深度被一步一步地使用两分方法让模仿的数据接近 SAR 图象调整。然后,当在模仿的信号和 SAR 图象之间合适的最好出现时,风速度, pycnocline 深度,阶段速度,组速度和内部波浪的振幅能从 SAR 形象被检索。方法在 Dongsha 岛附近在一幅景色 SAR 图象上被测试,在华南海,结果证明模仿的海洋的内部波浪 NRCS 侧面象90%一样高在有关联系数的 SAR 图象上在对那的好同意,并且从 SAR 形象检索的海洋的内部波浪的振幅与 SODA 数据是可比较的。而且,阶段速度在华南海从另外的 16 幅景色 SAR 图象检索了在对描述在内部波浪阶段速度和水深度之间的关系的实验公式的好同意,根平均数平方和相对错误是不到 0.11 ms -1并且7%,分别地,显示 SAR 图象为在这份报纸开发的内部波浪参数检索和方法是有用的会聚、适用。 | Kaiguo FAN Bin FU Yanzhen GU Xingxiu YU Tingting LIU Aiqin SHI Ke XU Xilin GAN | 2015 | Frontiers of Earth Science2015，9，4： | 2 |
| 2 | Influence of microtopography, ridge geometry and rainfall intensity on soil erosion induced by contouring failure显示文摘 | Liu Qianjin Shi Zhihua Yu Xingxiu | 2014 | Soil & Tillage Research2014，136，： | 1 |
| 3 | Comparative study on dissolved N and P loss and eutrophication risk in runoff water in contour and down-slope显示文摘 | Ma Qiau Yu Xingxiu Lti Guoan | 2010 | Journal of Food Agriculture & Environment2010，8，34： | 1 |
| 4 | A comparison of measured ^(137)Cs and excess ^(210)Pb levels in the cultivated brown and cinnamon soils of the Yimeng Mountain area显示文摘This contribution analyzes the similarities and differences between the measured activities of 137Cs and excess 210Pb(210Pbex) in the cultivated brown and cinnamon soils of the Yimeng Mountain area, discusses the influence of soil texture on the measurement of 210Pbex, and presents differences between the two types of soils. Fields A and B were selected to represent the fields that contain cultivated brown and cinnamon soils, respectively. From either study field, one site of sectioned core and six bulk cores were collected to measure 137Cs levels, 210Pbex levels, and the particle-size composition of soil samples. Three undisturbed soil samples were collected to measure capillary and aeration porosities. The 137Cs inventories for the two study fields are very similar. The 137Cs is a man-made radionuclide, which means that its measured levels for soils are unaffected by soil texture. In contrast, levels of the naturally occurring 210Pbex of soils from Field A were lower than those of Field B by about 50%. In contrast to aquatic sediments, levels of 210Pbex in terrestrial surface soils are affected by the emanation of 222Rn from the soils. It can be assumed that the coarser the soils, the greater the emanation of 222Rn; in addition, the lower the measured 210Pbex, the greater the underestimate of this value. The cultivated brown soils in Field A are coarser than the cultivated cinnamon soils in Field B. As a result, 222Rn in Field A will diffuse more easily into the atmosphere than that in Field B. As a consequence, the measured 210Pbex in soils from Field A is much lower than the actual value, whereas the value measured for Field B is much closer to the actual value. | ZHANG Yunqi LONG Yi YU Xingxiu AN Juan | 2014 | Chinese Journal Of Geochemistry2014，33，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员