We use the slowness-azimuth station correction( SASC) method to improve the location accuracy of the Wenchuan aftershocks recorded by the Nagqu and Hotan seismic arrays.The results show that the standard deviations of...We use the slowness-azimuth station correction( SASC) method to improve the location accuracy of the Wenchuan aftershocks recorded by the Nagqu and Hotan seismic arrays.The results show that the standard deviations of back-azimuth and slowness errors of Wenchuan aftershocks recorded by the Nagqu array decreased by 32% and 58%respectively after correction. The decrease is 38% and 71% for the Hotan array. After the correction,the location accuracy of all Wenchuan aftershocks recorded by the Nagqu array is improved. For the Hotan array,the accuracy is improved in the slowness estimation for 78% of aftershocks and in back-azimuth estimation for all aftershocks.展开更多
Ⅰ. INTRODUCTION The region in which ferroelectries exist with the perovskite type structure is presented in Ref. [1] of this paper in a 2-dimensional parameter space of Δx and (z/r_k)_A/
Let {Xm} be a sequence of i. i. d. random variables with common distribution function F（x）. Define U-statistic by where φ is a symmetric function of two variables with Eφ（X1, X2）=0. Our results generalize the Be...Let {Xm} be a sequence of i. i. d. random variables with common distribution function F（x）. Define U-statistic by where φ is a symmetric function of two variables with Eφ（X1, X2）=0. Our results generalize the Berry-Esseen inequality for U-statistics. Let g（x） be any function, defined for all x, satisfying the conditions: （ⅰ） non-negative, even,展开更多
In the years 1929—1934, G. Bexell, a member of the Sino-Swiss Scientific Investigation Team, discovered in the 'Nanshaa section', at Hongshuiba (洪水坝) of Shanghe (上河), Jiuquan (酒泉)region, Gansu Province...In the years 1929—1934, G. Bexell, a member of the Sino-Swiss Scientific Investigation Team, discovered in the 'Nanshaa section', at Hongshuiba (洪水坝) of Shanghe (上河), Jiuquan (酒泉)region, Gansu Province, fossils of the Upper Permian Flora,展开更多
基金sponsored by the Basic Scientific Research Special Program of Institute of Geophysics,China Earthquake Administration(DQJB08819)
文摘We use the slowness-azimuth station correction( SASC) method to improve the location accuracy of the Wenchuan aftershocks recorded by the Nagqu and Hotan seismic arrays.The results show that the standard deviations of back-azimuth and slowness errors of Wenchuan aftershocks recorded by the Nagqu array decreased by 32% and 58%respectively after correction. The decrease is 38% and 71% for the Hotan array. After the correction,the location accuracy of all Wenchuan aftershocks recorded by the Nagqu array is improved. For the Hotan array,the accuracy is improved in the slowness estimation for 78% of aftershocks and in back-azimuth estimation for all aftershocks.
文摘Ⅰ. INTRODUCTION The region in which ferroelectries exist with the perovskite type structure is presented in Ref. [1] of this paper in a 2-dimensional parameter space of Δx and (z/r_k)_A/
文摘Let {Xm} be a sequence of i. i. d. random variables with common distribution function F（x）. Define U-statistic by where φ is a symmetric function of two variables with Eφ（X1, X2）=0. Our results generalize the Berry-Esseen inequality for U-statistics. Let g（x） be any function, defined for all x, satisfying the conditions: （ⅰ） non-negative, even,
文摘In the years 1929—1934, G. Bexell, a member of the Sino-Swiss Scientific Investigation Team, discovered in the 'Nanshaa section', at Hongshuiba (洪水坝) of Shanghe (上河), Jiuquan (酒泉)region, Gansu Province, fossils of the Upper Permian Flora,
