- Oberon is the second largest moon of Uranus. It presents a surface covered with impact craters, indicating a geologically inactive past. Oberon is believed to have a rocky core surrounded by a layer of ice. - Umbriel is a dark, low-reflective moon of Uranus. It is characterized by ...
The core value of the library is librians' common occupational and professional ideal cornerstone,with significances in the value levels,and library profession is its main body.Library core value has the characteristics of lasting,unique,authoritative,ideal,and so on.The characteristics of core value...
Quantifying unbalance, the threshold for single ventricle palliation vs biventricular repair in patients with unbalanced complete atrioventricular septal defect (AVSD), is challenging. Using a core laboratory review of baseline echocardi... JM Meza,PJ Devlin,DM Overman,... - Semin Thorac Cardiovasc...
An unplanned, but unique, experiment has given an in situ measurement of the strength of deforming subglacial till under the central region of a major valley glacier. We report on both planned and unplanned borehole investigations of the subglacial shear zone of Columbia Glacier, southeast Alaska....
Simulations show that Mercury's core is made up of a mixture of iron and nickel, while the crust and mantle are mainly composed of silicates. Mercury's high density is likely due to the effect of impact and gravitational compression on the planet during its formation, as well as its ...
The greater the pore structure heterogeneity of a core, the bigger the fractal dimension calculated by single-line fitting, and the larger difference between the two fractal dimensions calculated by the two-line fitting method. 展开 关键词: mercury injection method pore structure fractal dimension ...
Grain size characteristics and evolution of core sedimentary environment in the Houtao plain reach of the Yellow river[J]. Acta Sedimentologica Sinica, 37(6): 1234-1243. (in Chinese with English abstract) Google Scholar LI M Y, ZHANG S R, XU H Q, et al., 2019. Spatial patterns ...
(Stalagmite PD); 7: the δ18O record of Lianhua Cave (Stalagmite A1); 8: the δ18O record of planktonic foraminifera in sediments of core TS6; 9: the Hematite-stained grains(HSG)content of North Atlantic; 10: the average grain diameter in sediments of core TS6; 11: 30°N summer ...
doi:1002-0721(2005)23:5<588:COREEO>2.0.TX;2-BMesozoic Erazirconelementtheta (eu)boundary of J3-K_1Luanping regionrare earthsRare earth elements of the zircons from the Mesozoic volcanic rocks in Luanping region, Hebei, were analyzed the results reflect that the average values of theta_(...
Porosity tends to be constant when the side length of the digital core cube model is 450 voxel. The reservoir space of tight sandstone reservoirs in the study area is mainly composed of intergranular pores and micro-fractures, with a small number of cleavage fractures, and more isolated pores....