Transmission Properties of W3 Y-Branch Filters in Two-Dimensional Photonic Crystal Slabs

A highly efficient W3 Y-branch filter in a two-dimensional photonic crystal slab with triangular lattice of air holes is designed and fabricated, and its transmission properties are measured. By accurately adjusting the size of the resonant cavities, the minimum wavelength spacing of 7 nm between two channels is realized. The corresponding resonant wavelengths of the two cavities agree well with the calculated ones. This implies that this kind of fiIter may be promising in integrated wavelength division multiplexing system.     

关于Fatou域的结构

给定有理函数$f$的一个不变的多连通吸性域$U$,我们证明存在一个有理函数$g$和它的一个完全不变的Fatou域$V$,使得$(f,U)$和$(g,V)$是全纯共轭的,而且$g$的Julia集的每个非平凡分支都是拟圆周,其内部是一个最多包含一个后临界轨道点的最终超吸性域. 进一步,$g$在相差一个全纯共轭的意义下是唯一的.     

吩噻嗪卤代衍生物的荧光研究

本文主要研究了3-溴-N-乙基吩噻嗪(Br-P)在各种酸度、增敏溶剂、感光效应等条件下的荧光变换现象，并确定了最佳的发光体系。方法简单、准确可靠，其线性范围为1×10     

MOMENT EXPANSIONS OF PROTON DIPOLAR SPINNING-SIDEBAND INTENSITIES IN A 1H MAS NMR SPECTRUM

对于包含分子和分子基团绕至少一个轴高速运动的固体体系，本文推导出其质子核磁共振谱的偶极魔角旋转边带强度的理论计算表达式，建立了用其静态粉末谱的矩的展开的计算方法，计算出旋转边带强度按三十阶矩展开的系数，它可以处理包含高达十五阶边带的谱.     

紧致Hermite流形之间的调和映照

将Bochner-Kodaira
公式推广到一般Hermite流形的复向量丛上. 作为应用得到了一类Hermite流形之间的调和映射的复解析性.     

Source-Type Solution of Nonlinear Parabolic Diffusion-Convection Equation

This paper is concerned with the nonlinear parabolic diffusion-convection equationut = (um).. (un)x (1)with a Dirac measure as its initial datum,i.e.u(x,0) = (x), (2)where m 1 and n 0 are two physical constants.From a mathematical point of view,this quasilinear parabolic equation is uniformly parabolicif m = 1 and nonuniformly parabolic (that is degenerate near the set where u = 0 ) if m > 1.Moreover the convection term become singular near the set where u = 0 if 0 < n < 1 .Ourtreatment will…     

纳米晶(CeO2)1-x(BiO1.5)x固溶体的水热合成

在240℃水热体系中首次合成出系列纳米晶固溶体(CeO