多元向量值正交小波包的刻画

In this paper,the notion of orthogonal vector-valued wavelet packets of space L2(Rs,Cn)is introduced.A procedure for constructing the orthogonal vector-valued wavelet packets is presented.Their properties are characterized by virtue of time-frequency analysis method,matrix theory and finite group theory,and three orthogonality formulas are obtained.Finally,new orthonormal bases of space L2(Rs,Cn)are extracted from these wavelet packets.     

英平诸痹灵药酒中铜、锰、镍、钴、锶、锂的含量及分析

利用火焰原子吸收法测定5种英平诸痹灵药酒中铜、锰、镍、钴、锶、锂的含量。结果表明，该类药酒中锰含量较丰富，锂含量较低，其含量由多到少的顺序为：锰＞锶＞镍＞铜＞钴＞锂。探讨了英平诸痹灵药酒中微量元素与治疗类风湿疾病的关系。     

Solitary Waves of a Perturbed sine—Gordon Equation

Based on the bifurcation and the idea that the solitary waves and shock waves of partial differential equations correspond respectively to the homoclinic and heteroclinic trajectories of nonlinear ordinary differential equations satisfied by the travelling waves,different conditions for the existence of solitary waves of a perturbed sine-Gordon equation are obtained.All of the corresponding approximate solitary wave solutions are given by integrating the derived approximate equations directly.     

Fibonacci光栅衍射频谱的自相似结构

本文设计并制作了一种按Ｆｉｂｏｎａｃｃｉ数列规则排列的准周期衍射光栅，从理论和实验两方面计算与显示了该光栅的自相似衍射频谱，这对准晶体光学中非周期的频率分析研究有一定的理论和实用价值。     

BRILLOUIN LIGHT-SCATTERING INVESTIGATION OF ELASTIC ANOMALY FROM SUPERLATTICES

In this paper we report some new experimental results concerning the elastic properties of periodic and quasiperiodic superlattices studied by means of Brillouin spectroscopy. The observation of both bulk and surface acoustic phonons as well as the fitting using effective medium approximation on the phonon spectrum enables us to extract accurately some rele-vant effective elastic constants in both structures. We have verified that the elastic anomaly which occurs in the periodic structures is also present in quasiperiodic ones. These results imply that the interaction mechanism of Fermi electrons with reduced Brillouin zone bound-ary is not responsible for the observed elastic anomalies, The comparative study of these superlattices proves that the elastic anomaly is relevant directly to interfacial effects.     

EFFECT OF LIGHT-INDUCED SCATTERING ON DIFFRACTION EFFICIENCY IN PHOTOREFRACTIVE CRYSTALS

The coupled wave equations and their analytic solutions in photorefractive crystals are presented for the case of two-beam writing, while the light-induced scattering is considered, Using this result, the diffraction efficiency for each writing beam is discussed in doped KNSBN crystals with unidirectional fan, which is explained theoretically and verified exper-imentally.     

变系数广义线性模型及其估计

本文以经典广义线性模型为基础,通过假定其中的回归变量的系数是某一度量空间中点的任意函数,提出了一类有广泛应用背景的变系数广义线性模型,增加了模型的灵活性和适应性,同时也适用于空间数据的统计分析。基于局部加权最大似然估计方法,文章讨论了变系数广义线性模型的拟合与统计推断,以及与之相关的局部权系统和其中光滑参数的确定。     

大芯径石英光纤中皮秒脉冲激光的自聚焦

本文报道了对大芯径石英光纤中皮秒脉冲激光自聚焦现象的实验研究和理论分析.文中测量了自聚焦先场的近场光强轮廓,研究了自聚焦光场的时域和频域性质,并对环形自聚焦光场的成因进行了解释.     

噁英鎓类高聚物薄膜非线性折射率的测量及其时间分辨研究

本文报道有机杂环化合物(口恶)英(钅翁)掺杂高聚物PMMA薄膜的光学特征,在600～1000nm波长范围内,透射率为80～90%,材料折射率n=1.554,利用反向传播简并四波混频法测得该薄膜的非线性光学系数x~(3)为10~(-10)e.s.u.,并观测到后向泵浦束被延迟情况下,前向泵浦光束与探测光束形成光栅瞬态弛豫时间分辨曲线,它的弛豫时间为30ps.     

赤霉酸对枯草杆菌α—淀粉酶形成的作用

在枯草杆菌细胞的培养基中加入赤霉酸,可以显著地促进α-淀粉酶的形成。环式磷酸腺苷和三磷酸腺苷能够模拟赤霉酸促进α-淀粉酶合成的作用。我们还观察了葡萄糖对α-淀粉酶产生的影响。当细菌在含有谷氨酸的培养基中生长时,加入葡萄糖能使α-淀粉酶的合成受到抑制。葡萄糖对α-淀粉酶形成的抑制作用可以被赤霉酸所消除。此外,在有赤霉酸存在时,枯草杆菌α-淀粉酶的合成受到放线菌素D的抑制。赤霉酸对α-淀粉酶合成的作用可能是在转录水平上受到环式磷酸腺苷的调节。