麦克斯韦方程和锥形折射

通过对麦克斯韦方程格林函数的计算 ,我们得到它的求解公式 ,然后解释为什么一束光线射到冰洲石表面上会产生两束折射光线 ,并描述了折射光线的路径     

The transmission and bistability of a nonlinear quasioptical resonator in ESR-conditions in ruby

Due to rapid progress of the nonlinear optics it has become real to observe and use the phenomenon of optics bistability in such passive structure as a Fabry-Perot resonator filled (completely or partially) with a substance having nonlinear adsorbtion and refraction. The problem of the optic bistability of such resonance structures were discussed in [1,2].     

5kW横流CO2激光器输出偏振特性研究

对采用Π型折叠光腔的工业用５ＫＷ横流ＣＯ２激光器的输出偏振特性了实验研究和理论分析，结果表明：其输出为垂直于光腔平面的１００％的线偏振光。     

棱镜玻璃折射率的测定

本文介绍了一种高精度测量玻璃折射率的任意偏向角法，主要说明了该方法的实验原理、测量方法及理论误差分析。     

二元衍射光栅式偏光器件的设计

本文利用双折射晶体刻划成的二元衍射光栅的衍射偏振特性,设计了偏光器件(可分别对o光或e光起偏);偏光分束器件(包括非对称及对称偏振分束两类),并对有关参数对设计的影响进行了讨论.     

平面光波导中的有效折射率数值解法及光场分析

本文给出一种计算有效折射率的数值迭代算法，通过计算得出平面光波导的光场分布及厚度。     

A compact numerical algorithm for solving the time‐dependent mild slope equation

The mild slope equation has been widely used to describe combined wave refraction and diffraction. In this study, a new numerical algorithm is developed to solve the time‐dependent mild slope equation in a second‐order hyperbolic form. The numerical algorithm is based on a compact and explicit finite difference method that is second‐order accurate in both time and space. The algorithm has the similar structure to the leap‐frog method but is constructed on three time levels for the second‐order time derivative term. The numerical model has the capability of simulating transient wave motion by correctly predicting the speed of wave energy propagation, which is important for the real‐time forecast of the arrival time of storm waves generated in the far field. The model is validated against analytical solution for wave shoaling and experimental data for combined wave refraction and diffraction over a submerged elliptic shoal on a slope (Coastal Eng. 1982; 6 :255). Lastly, the realistic scale Homma's island (Geophys. Mag. 1950; 21 :199) is studied with the use of various wave periods of T = 720s, T = 120 s, and T = 24 s. These wave periods correspond to long, intermediate, and short waves for the given topography, respectively. Comparisons are made between numerical results and existing analytical solutions in terms of the wave amplification around the island, which serves as the indicator for the potential wave runup. Excellent agreements are obtained. The model runs on a PC (Pentium IV 1.8GHz) and the computer capacity allows the computation of a mesh system up to 3000 × 3000, which is equivalent to about 150 × 150 waves or a large area of 540km × 540km for a wave train with the period of T = 60 s. Copyright 2004 John Wiley & Sons, Ltd.     

Rheological and microrheological characterization of a novel amphoteric xanthan gum

A novel amphoteric xanthan gum (AXG) containing anionic carboxyl groups and cationic quaternary ammonium substituents was prepared from xanthan gum (XG) and 3-chloro-2-hydroxypropyltriethanolammonium acetate. The rheological and microrheological properties of AXG and XG solutions were studied in this work. The rheological results showed that the apparent viscosity of the 0.4% AXG solution was 5.26 times that of the 0.4% XG solution, and the AXG solution exhibited more obvious thixotropy and much stronger viscoelasticity than the XG solution. Both experiment and numerical simulations were adopted to investigate the gel-breaking process of the AXG solution, and the rheokinetics equations can well describe the evolution of complex viscosity. Moreover, the optical microrheology method was also adopted to investigate the microrheological behavior of AXG and XG solutions. The microrheological results showed that the AXG solution exhibited higher viscosity index at zero shear and a more obvious solid-like behavior than the XG solution. Good agreement is found when comparing the results obtained from microrheology to classical rheology, which verifies the feasibility of the microrheology method for measuring the solution properties, especially some properties not well described by the current rheological approach.     

Viscosity, Surface Tension, and Refractive Index Measurements of Mixtures of Isomeric Butanediols with Water

Solution properties of aqueous mixtures of isomeric butanediols have been investigated employing viscosity, surface tension, and index of refraction measurements as functions of temperature. The deviation of viscosity, surface tension, and molar refraction from ideal solution behavior is evaluated from the experimental data. The deviation from ideality is discussed in terms of molecular interactions between the components. Surface activity of the diols is evident from the surface tension measurements. It is found that the degree of hydrophobicity of the diols varies in the order 1,2 > 2,3 > 1,3 > 1,4. The strength of interaction of diols with the water varies in the order 2,3 > 1,4 1,3 > 1,2.     

两性离子交换树脂吸附L-苹果酸热力学研究

本文研究了两性离子交换树脂柱吸附分离L－苹果酸的热力学行为，在分析柱上测定了不同温度时的吸附等温线热力学性能的变化，结果表明，当温度对20℃至80℃变化时，该树脂对L－苹果酸的吸附量显著减小。故可采用热水作为洗脱剂进行脱附。进一步计算得该树脂吸附热△H为－34.89KJ/mol，该值远大于一般的酸／碱离子交换树脂，因而温度对其平衡产生很大的影响。