308nm激光作用下V2O5非晶薄膜的变异

研究了在308nm准分子激光辐照下，V₂O₅非晶薄膜性质的变化-利用X射线衍射、X射线光电子能谱及扫描电子显微镜等多种测试方法进行了分析比较，确定V₂O₅非晶薄膜性质的变化是由于高功率密度的准分子激光作用，造成V₂O₅薄膜的快速升温熔化和快速冷凝重构，使其中的氧产生缺位，引起化学配比偏离所致- 关键词：     

酰胺Ⅰ与残基分子间不对称耦合作用下孤立子特性的变化

文内研究了酰胺Ⅰ振动与其前后胺基酸残基分子间不对称耦合对蛋白质分子链上所激发孤立子的能量、动量等特性的影响。结果表明，无论是亚声速孤立子还是超声速孤立子都能被激发，并且这种非对称耦合致使亚声速孤立子的波形振幅、能量及动量增大，孤立子的形成能降低     

Effects of Correlations Between the Real and Imaginary Parts of Quantum Noise on Intensity Fluctuation for a Single-Mode Laser

We study the effects of correlations between the real and imaginary parts of quantum noise on the intensity fluctuation for a single-mode laser. The analytic expressions of the intensity correlation function C(r) and the associated relaxation time Tc in the case of a stable locked phase resulting from the cross-correlation λq between the real and imaginary parts of quantum noise are derived by means of projection operator method. Based on numerical computations it is found that the presence of cross-correlations between the real and imaginary parts of quantum noise causes the intensity fluctuation to increase. A slowing-down phenomenon exists in the sense that Tc increases as a function of |λq|. Thus the decay o[ intensity fluctuation becomes slower.     

准分子激光作用下二氧化钛的表面变性

适当能量密度的准分子激光作用于二氧化钛时，电导性能发生了显著的变化，室温下从原来的绝缘体转变为半导体，同时表面颜色也发生了变化．利用X射线衍射、X射线光电子能谱及显微分析等多种测试方法进行了分析、比较，确定了该过程是由于短脉冲的准分子激光作用，造成了二氧化钛的快速升温熔化和快速冷凝重构，导致氧的缺位，引起了化学配比偏离．用热传导方程对能量密度阈值进行了近似估算，结果与实验基本相符 关键词：     

Effects of cross-correlated noises on the relaxation time of the bistable system

The stationary correlation function and the associated relaxation time for a general system driven by cross-correlated white noises are derived, by virtue of a Stratonovich-like ansatz. The effects of correlated noises on the relaxation time of a bistable kinetic model coupled to an additive and a multiplicative white noises are studied. It is proved that for small fluctuations the relaxation time T_c as a function of λ (the correlated intensity between noises) exhibits very different behaviours for αD (α and D, respectively, stand for the ntensities of additive and multiplicative noises). When α>D, T_c increases with increasing λ. But when α相似文献   

YBaCuO超导体中Cl代O的研究

用不同来源的Cl^-部分取代Y123相中的O，结果表明：不论以什么方式掺杂，都能获得正交相．以CuCl₂方式引入的Cl^-主要占据在123相的O2位置上，而以BaCl₂方式引入的Cl^-则主要占据在O4位置，前者引起超导电性显著的变化，而且使正常态的电导行为由金属性变为半导体性；后者虽然导致T_c下降，但T_c＞77K，且正常态的电导行为未改变，说明CuO面上的氧 关键词：     

Mean First—Passage Time of a Bistable Kinetic Model Driven by Multiplicative Coloured Noise and Additive White Noise

We study the transient properties of a bistable kinetic system driven by correlated noises for the cases of multiplicative coloured noise and additive white noise. The mean first-passage time (MFPT) of the system is calculated. From numerical computations we find that: (i) the MFPT of the bistable system are affected by the correlation time of multiplicative coloured noise T and the cross-correlation strength between noises λ and, T and λ play the same roles in the MFPT. (ii) The MFPT corresponding to weakly correlated noises and strongly correlated noises exhibits the very different behaviour and there is a one-peak structure in the MFPT for strongly correlated noises. The peak grows highly as T increases, which means that the noisy colour causes the suppression effect of the escape rate to become more pronounced.