在简单回顾奇异值法压制随机噪音的基础上,提出了基于奇异值分解的f x y域滤波方法。该方法是一种三维去噪方法,它不需求取同相轴的倾角就可以去除倾斜同相轴的随机噪音,同时还可以较好地保持地震信号的振幅。经理论模型试算表明,该方...在简单回顾奇异值法压制随机噪音的基础上,提出了基于奇异值分解的f x y域滤波方法。该方法是一种三维去噪方法,它不需求取同相轴的倾角就可以去除倾斜同相轴的随机噪音,同时还可以较好地保持地震信号的振幅。经理论模型试算表明,该方法运算速度快,效果明显,是一种可行的去噪方法。展开更多
For a function y=f(x)to have an inverse function,f must be one-to-one.Then for each x in its domian there is exactly one y in its range;furthermore,to each y in the range,there corresponds exactly one x in the domain....For a function y=f(x)to have an inverse function,f must be one-to-one.Then for each x in its domian there is exactly one y in its range;furthermore,to each y in the range,there corresponds exactly one x in the domain.The correspondence from the展开更多
In the present note, through partial substituting of O<sup>2-</sup> by F<sup>-</sup>, CL<sup>-</sup> halogen ions, the HPCP (high-pressure cubic phase) of SrB<sub>2</sub&...In the present note, through partial substituting of O<sup>2-</sup> by F<sup>-</sup>, CL<sup>-</sup> halogen ions, the HPCP (high-pressure cubic phase) of SrB<sub>2</sub>O<sub>4-y</sub>X<sub>y</sub>: Eu<sup>2+</sup> (X=F, Cl) has been synthesized at 800℃ and 3.05GPa for the first time. The results show that the QE (luminescence quantum efficience) of HPCP doped by Cl is twice that of HPCP without doping, and 200展开更多
文摘For a function y=f(x)to have an inverse function,f must be one-to-one.Then for each x in its domian there is exactly one y in its range;furthermore,to each y in the range,there corresponds exactly one x in the domain.The correspondence from the
基金Project supported by the National Natural Science Foundation of China
文摘In the present note, through partial substituting of O<sup>2-</sup> by F<sup>-</sup>, CL<sup>-</sup> halogen ions, the HPCP (high-pressure cubic phase) of SrB<sub>2</sub>O<sub>4-y</sub>X<sub>y</sub>: Eu<sup>2+</sup> (X=F, Cl) has been synthesized at 800℃ and 3.05GPa for the first time. The results show that the QE (luminescence quantum efficience) of HPCP doped by Cl is twice that of HPCP without doping, and 200