Wronskian and Grammian Determinant Solutions for a Variable-Coefficient Kadomtsev-Petviashvili Equation

In this paper, we derive the bilinear form for a variable-coefficient Kadomtsev Petviashvili-typed equation. Based on the bilinear form, we obtain the Wronskian determinant solution, which is proved to be indeed an exact solution of this equation through the Wronskian technique. In addition, we testify that this equation can be reduced to a Jacobi identity by considering its solution as a Grammian determinant by means of Pfaffian derivative formulae.     

Quantum Heat Transfer in a Harmonic Chain with a Dephasing Reservoir

The quantum heat transfer in a harmonic chain with a dephasing reservoir is investigated based on the master equation method. The incoming phonons from the thermal reservoir will be scattered back partially into the reservoir at the contact site, leading to the contact resistance. Dephasing in the harmonic chain suppresses the transmitting of scattered phonons into the harmonic chain. Then the heat flux in the chain is reduced by dephasing. However, the heat t~ux is symmetric to interchanging the reservoirs temperatures even with the dephasing. Therefore, the thermal rectification csnnot be realized with pure depha~ing only.     

一种高准确度、高可靠的红外光电时刻测量系统

针对靶场试验对测量仪器的准确度及可靠性的特殊要求,开发了一种基于嵌入式PC/104模块和大规模可编程逻辑器件CPLD的红外光电时刻测量系统.介绍了该系统的组成、测量原理及其实现途径.靶场实验结果表明,该系统设计环境适应能力强,能可靠地工作在－35～45℃的环境下;测量准确度高,测时误差小于30 μs.     

Topological Structure of Entropy of 4-Dimensional Axisymmetric Black Holes

Using the relationship between the entropy and the Euler characteristic, an entropy density is introduced to describe the inner topological structure of the entropy of 4-dimensional axisymmetric black holes. It is pointed out that the density of entropy is determined by the singularities of the timelike Killing vector field of spacetime, and these singularities carry the topological numbers, Hopf indices and Brouwer degrees, which are topological invariants. At last, Kerr–Newman black hole as an example of axisymmetric black holes is given. What’s more, the entropy and the latent heat of the topological phase transition of the black hole mentioned above are calculated and the latent heat just lies in the range of the energy of gamma ray bursts. This work is supported in part by the NSFs of China under Grant No. 10575068 and of Shanghai Municipal Committee of Science and Technology under Grant No. 04ZR14059 and Shanghai Leading Academic Discipline Project under Project Number: T0104.     

Depolarization properties of cirrus clouds from polarization lidar measurements over Hefei in spring

A new polarization lidar has been developed for detecting depolarization characteristics of aerosol and cirrus over Hefei (31.90°N, 117.16°E), China. The fundamental principle of polarization lidar is briefly introduced.     

一种新型微透镜阵列成象式投影光刻系统的研究

从理论和实验两方面入手,系统地研究了微透镜阵列的形成原理和制作工艺,分析了微透镜阵列的面形结构,得到了联系微透镜阵列矢高与制作工艺参量的经验公式.并且将四片微透镜阵列耦合,形成一个深紫外光刻的1:1成象的多孔径微小光刻系统.从几何光学理论出发,分析了这个光刻系统综合成象的特点,讨论了这种光刻系统的光学性能,并给出了实验测量方法.     

共焦扫描显微成象系统的点扩散函数再商讨

针对共焦扫描显微成象中物体相对于被扫描点的位置矢量是反向移动的特性,探讨了物体移动后的物函数在此基础上,根据成象的理论进行了计算,得到新的系统点扩散函数表达式,最后根据计算结果分析成象的性质,得出了系统成象的相干性.     

胆结石中蛋白质的傅里叶变换红外光谱和表面增强拉曼光谱研究

用氯仿、乙醚、乙醇和盐酸等溶剂溶解一组人体胆结石，获取难溶物；用傅里叶变换红外光谱和表面增强拉曼光谱对难溶剩余物进行研究。结果显示，结石难溶物主要由胆红素盐和蛋白质组成，结石中的蛋白质的二级结构以α螺旋和无规卷曲构象为主，其中α螺旋构象成分较多。讨论了蛋白质在胆结石形成中的作用。     

PIV水下流场测试系统试验研究

基于粒子图像测速技术,设计研制了一套适用于水洞洞体内高速、封闭试验条件的流场测量与显示设备.该系统由光源、成像、图像处理与分析、控制和粒子投放等分系统组成,具有复杂环境下全流场的无接触、无扰动、高准确度测量和显示能力,流场测试误差小于2%,可为水下航行器外形设计及其改进提供相关的实测数据.     

采用Authorware 5制作现代光学实验多媒体课件

我们采用目前最流行的多媒体制作软件Authorware 5开发工具，把现代光学实验原理，公式推导，实验内容，步骤等字材料，以及用CCD采集的干涉图像，优美的背景音乐及解说词等多种数学信息，制作成多媒体课件，可直接用于远程教育，有较大的实用价值。