長期地磁變化 的英文怎麼說
中文拼音 [zhǎngqīdecíbiànhuà]
長期地磁變化
英文
secular variation-
For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics
利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0The basic characteristics of secular variation of geomagnetic field of sheshan seismic station
佘山臺地磁場長期變化基本特徵For a class of quasi - one - dimensional cluster, we study the effect of side spins on the spin - spin correlation on chain, our calculations show that the side spins added in the same sublattice can effectively strengthen the spin - spin correlation in large distance region and make the change tend to flat
計算證明，側自旋加進相同的子格中能有效地加強自旋關聯使得它在長距離范圍內的變化趨于平緩，而周期性地加入側自旋可以在基態中建立磁性長程序。Some features in the secular variation of the geomagnetic field in chinese mainland
中國大陸地磁場長期變化的某些特徵Three - dimensional distribution of geomagnetic energy in the earth ' s interior and its secular variations
地磁場能量在地球內部的三維分佈及其長期變化分享友人