我所2016年发表论文欣赏-第二十六期

地球所研究生会 · 公众号 · · 2017-07-10 14:31

正文

题目

Experimental study of directionally solidified ferromagnetic shape memory alloy under multi-field coupling

作者

Yuping Zhu , Tao Chen , Yao Teng , Bingfei Liu , Lijun Xue

发表刊物

《Journal of Magnetism and Magnetic Materials》

摘要

Directionally solidified, polycrystalline Ni–Mn–Ga is studied in this paper. The polycrystalline Ni–Mn–Ga samples were cut at different angles to solidification direction. The magnetic field induced strain under constant stress and the temperature-induced strain under constant magnetic field during the loading–unloading cycle were measured. The experimental results show that the mechanical behavior during the loading–unloading cycle of the material is nonlinear and anisotropic. Based on the experimental results, the effects of multi-field coupling factors, such as stress, magnetic field, temperature and cutting angle on the mechanical behaviors were analyzed. Some useful conclusions were obtained, which will provide
guidance for practical applications.

题目

The crustal structure of south central Mongolia
using receiver functions

作者

Jing He , Qingju Wu , Eric Sandvol , James Ni , Andrea Gallegos , Mengtan Gao ,Munkhuu Ulziibat , and Sodnomsambuu Demberel

发表刊物

《AGU》

摘要

The crustal thicknessH and averagecrustal velocityratio k (Vp/Vs) beneath south central Mongolia are investigated using the H-k stacking method based on teleseismic radial receiver functions. Our primary results reveal that the local crustal thickness varies from 38 to 46km with an average value of 43km. Thicker crust is found beneath the western Hentey Mountains, while thinner crust is located in the southern area of the Zuunbayan fault zone. The Bouguer gravity anomalies exhibit a strong correlation with the overall crustal thickness pattern throughout most of our study regime. Moreover, a new approach which integrates the Bouguer anomaly gradient and the receiver function-derived crustal thickness is adopted to calculate the density of thelower crustunderneath central Mongolia. Fairly dense lower crust of approximately3000kg/m 3 is found in the Middle Gobi Desert. The measured crustal Vp/Vs ratio ranges from 1.68 to 1.83 with an average
value of 1.74. Low Vp/Vs ratio is found beneath the western Hentey Mountains. In general, low Vp/Vs ratios correlate well with regions of quartz-rich crust and high heat flow. High Vp/Vs ratios occur in the Middle Gobi
volcanic regions and the Mesozoic Southern Gobi Basin.