parabolic dune

parabolic dune的基本解释

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抛物线沙丘, 新月形沙丘

与parabolic dune相关的网络例句 [注：此内容来源于网络，仅供参考]

We have observed the structure of these dune sands and analyzed the grain-size,surface textural features and several main chemical elements of them,the results showed that:(1) these dune sands have some eolian structure characteristics which are similar to the recent dune sands;(2) they are also similar to the recent dune sands in grain-size components,and parameters of Mz,?滓,Sk and Kg,as well as in several main chemical components;(3) the scatter plots of Mz-?滓,SiO2-Al2O3+TOFE and the probability curves of grain-size showed that these paleo dune sands are different from paleosols and fluvio-lacustrine facies but are consistency with recent dune sands;and(4) the quartz sands have well roundness and some surface textural features such as dish-shape pits,crescent-shape pits,pockmarked pits,upturned cleavage plates,siliceous precipitates and siliceous crevasses,indicating that they had been carried for a long time by the wind.

对这些沙丘砂的沉积构造观察以及粒度、扫描电镜和常量化学元素分析结果表明：(1)这些沙丘砂具有与现代沙丘砂相似的风成沉积构造特征；(2)粒度及其参数--Mz、σ、Sk和Kg，以及主要化学组分SiO2、Al2O3和TOFE也与现代沙丘砂相近；(3)Mz-σ、SiO2-Al2O3+TOFE散点图和概率累积曲线显示这些沙丘砂与萨拉乌苏组中的河湖相、古土壤差别明显，而与现代沙丘砂一致；(4)石英砂颗粒具有良好的磨圆以及碟形坑、新月形坑、麻坑、上翻解理薄片、硅质沉淀和硅质裂纹等表面结构特征，反映其曾受持久的风力搬运作用。

The second part is the controllability of parabolic equation .We study on the controllability of parabolic systems with a nonlinear term involving the state and the gradient ,the null-controllability property of a 1-d parabolic equation involving a fractional power of the Laplace operator ,null controllability of some systems of two parabolic equations with one control force ,and exact controllability of the parabolic system with bilinear control .

第二部分写的是，抛物方程的能控性，我们研究了含有状态和梯度的非线性的项抛物系统的能控性，含有拉普拉斯算子的分数阶的1-d抛物方程的零能控性，带有一个强控制的两个抛物方程的一些系统的零能控性和具有双线性控制抛物系统的精确能控性。

This study provided the analysis of changes of species diversity and productivity in relation to soil properties in six typical habitats （wet meadow, dry grassland, fixed dune, semi-fixed dune, semi-shifted dune, and shifted dune） in Horqin Sand Land.

研究了科尔沁沙地6个典型生境类型的沙质草地群落物种多样性与生产力的变化，分析了植物群落格局、物种多样性、生产力与土壤特性的关系。

与parabolic dune相关的网络解释 [注：此内容来源于网络，仅供参考]

mobile dune, wandering dune：流动沙丘

crescent dune 新月形沙丘 | mobile dune, wandering dune 流动沙丘 | fixed dune 固定沙丘

parabolic cylindrical surface：抛物柱面

parabolic cylindrical equation 抛物柱面型方程 | parabolic cylindrical surface 抛物柱面 | parabolic detection 抛物线检波

degenerate parabolic equation：拟线性退缩抛物方程

伪抛物型积分微分方程:Linear Quasi-parabolic Integro-differential Equation | 拟线性退缩抛物方程:Degenerate parabolic equation | 抛物型变分不等式:parabolic variational inequalities