Ar^＋刻蚀对MoS2润滑膜分子结构的影响

采用Ar^ 离子溅射源进行XPS和AES剖面分析,结果发现,Ar^ 对MoS2分子中的S原子产生“择优”选择刻蚀并随之生成非化学计量比的MoSx,Mo原子被还原,Mo3d结合能值向低端位移约1．7eV。应该注意的是,采用Ar^ 溅射进行XPS剖面分析时不能确定材料表面和界面元素的化学价态,S／Mo原子比同实验值之间亦存在差异,故应采用有关软件对实验结果进行修正。     

交换环上的w~*-模

设R是交换环,M是R-模,J是R的有限生成正则理想,若自然同态φ:R→J~*=HomR(J,R)是同构,则J称为R的GV~*-理想。用GV~*-理想定义了GV~*-无挠模,证明了无挠模是GV~*-无挠模。接着引入了w~*-模,模的w~*-包络,得到了正则w~*-理想与正则w-理想的等价性。作为应用,对w-Noether环和SM环进行了新的刻画,并证明了相应的w~*-版本的Cartan-Eilenberg-Bass定理。     

真空管内聚光集热器光学性能研究

针对具有内部反射涂层和偏心吸收管的新型真空管内聚光集热器,建立了反映其结构的几何模型,并基于光线追迹法,依托光学分析软件TracePro对其光学性能进行了研究。通过模拟仿真分别得到了该集热器对太阳直射辐射和散射辐射的光学效率,并与传统真空管集热器进行了对比。此外还研究了径向入射角、轴向入射角、内玻璃管偏心距、反射涂层圆心角等参数对光学效率的影响。最后与实验结果进行对比验证,证明了该集热器具有突出的光学性能。     

Complexiton solutions of the （2＋1）-dimensional dispersive long wave equation

In this pager a pure algebraic method implemented in a computer algebraic system, named multiple Riccati equations rational expansion method, is presented to construct a novel class of complexiton solutions to integrable equations and nonintegrable equations. By solving the (2+1)-dimensional dispersive long wave equation, it obtains many new types of complexiton solutions such as various combination of trigonometric periodic and hyperbolic function solutions, various combination of trigonometric periodic and rational function solutions, various combination of hyperbolic and rational function solutions, etc.     

Manipulation of Particles with Counter-Propagating Evanescent Waves

Two counter-propagating evanescent beams are used to align and manipulate polystyrene particles on a prism surface. Since the radiation pressure transferred laterally from the evanescent wave is negated on both sides, particles can be stably aligned. By projecting a circular and a linear beam spot onto the interface, both multiple and single arrays of particles are achieved. Arrays of particles trapped on the interface can be easily moved adjusting the intensity of incident beams on either side. We also simulate electromagnetic distribution of scattering light that is converted from the evanescent wave using the FDTD method. The results show that scattering light converts from an evanescent wave propagating through a particle array and has a distance longer than that propagating from a normal evanescent wave.     

熔融浇铸法合成Bi—Sr—Ca—Cu—O高温超导体

将 Bi_2O_3,SrCO_3,CaCO_3,CuO 按比例混合和熔融,化合成 Bi-Sr-Ca-Cu-O 复合氧化物,浇铸成型;经高温退火处理获得起始转变温度117K,零电阻温度79K 的多相超导体.此法与通常的烧结法进行了对比.     

Design and analysis of a novel tunable optical power splitter

A novel tunable optical power splitter,with a Y-branch waveguide based on the total internal reflection and a microprism with tunable index refraction,is presented.Numerical simulation of its optical performance shows that a high dynamic range,low optical loss,and relatively low wavelength-dependence can be achieved.This component offers numerous advantages such as ease for fabrication,low cost,and compact size,which are very useful for potential application in integrated optical devices.     

有超车规则的交通流的元胞自动机模型

分析和评论了2014年美国大学生数学建模竞赛（MCM）A题,以及获得outstanding winner奖的6篇论文。首先对试题进行分析,并结合已有文献指出A题的主要解题思路;然后,通过评述获奖论文,指出学生论文的优点及存在的问题;最后,对今年赛题的某些问题进行讨论。     

新课标下的数学课堂教学过程的优化

何为课堂教学过程的优化呢？课堂教学过程的优化是指在全面考虑教材目的、教学规律、原则、教学形式、教学方法、深入钻研教材和考虑学生特点的基础上使教学质量达到有效的理想的成果．教学过程的优化与否，直接关系着教学的效果，决定着教学质量的高低．为此，我在二十多年的数学课教学过程中，努力探索最优化的课堂教学过程．下面仅就本人的教学实践，谈几点粗浅的认识．