TH703 98010052用部分相干光衍射理论研究光栅成像系统=Studyof grating imaging system using theory of partialcoherence[刊,中]/邓健,王晓方,张正泉(中科院上海光机所.上海(201800))//光学学报.-1997,17(4).-465-471对可用于研究X...TH703 98010052用部分相干光衍射理论研究光栅成像系统=Studyof grating imaging system using theory of partialcoherence[刊,中]/邓健,王晓方,张正泉(中科院上海光机所.上海(201800))//光学学报.-1997,17(4).-465-471对可用于研究X射线源光谱特性的光栅成像系统进行了研究,运用部分相干光成像理论对系统的成像性质和传递函数进行分析,指出像面上的光强分布正比于光栅复振幅透过率函数的自相关函数的傅里叶变换与光源在接收面上的几何投影像之间的卷积。展开更多
The holomorphic factorization of the superstring partition function is verified at arbitrary genus. The evaluation of scattering amplitudes and the implications of genus-dependent estimates on the string coupling are ...The holomorphic factorization of the superstring partition function is verified at arbitrary genus. The evaluation of scattering amplitudes and the implications of genus-dependent estimates on the string coupling are given.展开更多
Oblique wave interaction with a two-layer breakwater consisting of perforated front and back wall in the presence of bottom undulations is analyzed.Wave characteristics are studied in the framework of small-amplitude ...Oblique wave interaction with a two-layer breakwater consisting of perforated front and back wall in the presence of bottom undulations is analyzed.Wave characteristics are studied in the framework of small-amplitude wave theory,and Darcy’s law is used for flow past porous structures.The varying bottom topography spanned over a finite interval connected by two semi-infinite intervals of uniform water depths.Eigenfunction expansion method is used to handle the solution in the regions of uniform bottom and a modified mild-slope equation along with jump conditions is employed for varying bottom topography.Reflection,transmission,and wave energy dissipation coefficients are obtained numerically by applying the matrix method to understand the effects of several physical quantities such as wavenumber,porosity,and angle of incidence.The transmission coefficient reduces significantly and the wave energy dissipation is high for the present model.Also,Bragg scattering is analyzed in the presence of step-type rippled bottom and presented in this paper.展开更多
文摘TH703 98010052用部分相干光衍射理论研究光栅成像系统=Studyof grating imaging system using theory of partialcoherence[刊,中]/邓健,王晓方,张正泉(中科院上海光机所.上海(201800))//光学学报.-1997,17(4).-465-471对可用于研究X射线源光谱特性的光栅成像系统进行了研究,运用部分相干光成像理论对系统的成像性质和传递函数进行分析,指出像面上的光强分布正比于光栅复振幅透过率函数的自相关函数的傅里叶变换与光源在接收面上的几何投影像之间的卷积。
文摘The holomorphic factorization of the superstring partition function is verified at arbitrary genus. The evaluation of scattering amplitudes and the implications of genus-dependent estimates on the string coupling are given.
基金Saista Tabssum acknowledges the Institute post-doctoral fellowship grant from Indian Institute of Technology,Bombay.
文摘Oblique wave interaction with a two-layer breakwater consisting of perforated front and back wall in the presence of bottom undulations is analyzed.Wave characteristics are studied in the framework of small-amplitude wave theory,and Darcy’s law is used for flow past porous structures.The varying bottom topography spanned over a finite interval connected by two semi-infinite intervals of uniform water depths.Eigenfunction expansion method is used to handle the solution in the regions of uniform bottom and a modified mild-slope equation along with jump conditions is employed for varying bottom topography.Reflection,transmission,and wave energy dissipation coefficients are obtained numerically by applying the matrix method to understand the effects of several physical quantities such as wavenumber,porosity,and angle of incidence.The transmission coefficient reduces significantly and the wave energy dissipation is high for the present model.Also,Bragg scattering is analyzed in the presence of step-type rippled bottom and presented in this paper.
