基于Windows Mobile平台的产品管理软件的设计与开发

分析了基于Windows Mobile平台的维吾尔文产品管理系统,着重研究Windows Mobile的应用开发及维吾尔文的书写特点、手机输入法设计中的难点与不等宽问题．设计实现了具有不同编辑方向的维、汉、英、多语种智能手机的混合输入和屏幕显示．在基于.NET compact Framework的智能设备开发框架下,使用Pocket outlook对象模型,实现了客户的便捷通讯功能．在系统的设计和实现过程中,引入Windows Mobile技术和SQL Server Mobile数据库技术来解决相关数据的存储和处理问题．     

Detection of Fe 3d electronic states in valence band and magnetic properties of Fe-doped ZnO film

Fe-doped ZnO film has been grown by laser molecular beam epitaxy (L-MBE) and structurally characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), all of which reveal the high quality of the film. No secondary phase was detected. Resonant photoemission spectroscopy (RPES) with photon energies around the Fe 2p-3d absorption edge is performed to detect the electronic structure in the valence band. A strong resonant effect at a photon energy of 710 eV is observed. Fe³⁺ is the only valence state of Fe ions in the film and the Fe 3d electronic states are concentrated at binding energies of about 3.8 eV and 7 eV～ 8 eV. There are no electronic states related to Fe near the Fermi level. Magnetic measurements reveal a typical superparamagnetic property at room temperature. The absence of electronic states related to Fe near the Fermi level and the high quality of the film, with few defects, provide little support to ferromagnetism.     

SiH2Cl2-NH3配比对a-SiNx:H薄膜PL峰的影响

低压化学气相沉积制备的纳米硅镶嵌结构的a-SiNx：H薄膜,在3．75eV的激光激发下,室温下发射1～3个高强度的可见荧光。在相同的沉积温度下（900℃）,选择不同的SiH2Cl2和NH3气体配比时,所得薄膜表现出不同的荧光属性,荧光峰的峰位和数目有着显著的变化。通过TEM、IR、XPS等分析手段对其原因进行了研究分析,认为不同配比下,生成的薄膜中缺陷态的种类和密度有所不同,这影响了其PL峰个数及其各峰的相对强弱。     

Diffusion behavior of helium in titanium and the effect of grain boundaries revealed by molecular dynamics simulation

The microstructures of titanium(Ti), an attractive tritium(T) storage material, will affect the evolution process of the retained helium(He). Understanding the diffusion behavior of He at the atomic scale is crucial for the mechanism of material degradation. The novel diffusion behavior of He has been reported by molecular dynamics(MD) simulation for the bulk hcp-Ti system and the system with grain boundary(GB). It is observed that the diffusion of He in the bulk hcp-Ti is significantly anisotropic(the diffusion coefficient of the [0001] direction is higher than that of the basal plane),as represented by the different migration energies. Different from convention, the GB accelerates the diffusion of He in one direction but not in the other. It is observed that a twin boundary(TB) can serve as an effective trapped region for He.The TB accelerates diffusion of He in the direction perpendicular to the twinning direction(TD), while it decelerates the diffusion in the TD. This finding is attributable to the change of diffusion path caused by the distortion of the local favorable site for He and the change of its number in the TB region.     

Observation of selective surface element substitution in FeTe_(0.5)Se_(0.5) superconductor thin film exposed to ambient air by synchrotron radiation spectroscopy

A systematic investigation of oxidation on a superconductive Fe Te_(0.5)Se_(0.5)thin film,which was grown on Nb-doped SrTiO_3(001) by pulsed laser deposition,has been carried out.The sample was exposed to ambient air for one month for oxidation.Macroscopically,the exposed specimen lost its superconductivity due to oxidation.The specimen was subjected to in situ synchrotron radiation photoelectron spectroscopy(PES) and x-ray absorption spectroscopy(XAS) measurements following cycles of annealing and argon ion etching treatments to unravel what happened in the electronic structure and composition after exposure to air.By the spectroscopic measurements,we found that the as-grown FeTe_(0.5)Se_(0.5)superconductive thin film experienced an element selective substitution reaction.The oxidation preferentially proceeds through pumping out the Te and forming Fe–O bonds by O substitution of Te.In addition,our results certify that in situ vacuum annealing and low-energy argon ion etching methods combined with spectroscopy are suitable for depth element and valence analysis of layered structure superconductor materials.     

基于用户关系的维吾尔文微博数据获取方法的研究

目前,互联网上的大部分群体性数据资源集中在微博、论坛等社交网络上.跨语言社会舆情分析是我国智能信息处理的一个研究热点.维吾尔语是我国主要少数民族语言之一,为了构建一个好的跨语言舆情分析系统,维吾尔文微博的数据获取显得尤为重要.维吾尔文微博数据获取最大的难点是微博开发商不提供API.本文以技术和经济为基础的"Guduk"微博为研究对象,提出了一种基于用户关系的维吾尔文微博数据获取爬虫系统方案,此方案解决了在不提供API情况下的数据获取难点.本文的研究为跨语言舆情分析系统提供大量的维吾尔文社交网络数据资源、数据获取方法和技术.     

圆内(外)角定理及其应用

现将圆内角定理和圆外角定理及其部分应用介绍如下．一、圆内角定理“顶点在圆内的角的度数,等于它所对的弧和它的对顶角所对的弧的度数的和的一半．”(初中几何第二册19页第1题)     

一个新型、综合的表面分析装置———同步辐射光电子能谱实验站

一个新型、综合的表面分析装置———同步辐射光电子能谱实验站刘凤琴奎热西钱海杰陶小平杨易董宇辉贾金蜂（中国科学院高能物理研究所，北京１０００３９）在所有现代表面分析技术中，光电子能谱是使用最广泛的一种．光电子能谱主要研究处于表面的物质的电子结构，因而...     

光导热塑料及其在全息技术中的应用

一、前 言 作为一种崭新的成像技术,全息照相术[1,2]不仅以其能获得物体的三维再现象引人注意,而且已经成为激光应用的一个重要领域,与科学研究、新技术发展和工业生产等许多方面发生联系.目前,全息照相用的主要记录材料是银盐底片.但是从操作、使用方面来看,银盐底片存在着许多固有的弱点,给全息技术推广应用带来了很大困难.为此开展了多种非银盐记录材料的研究.例如掺Fe 铌酸锂、重铬酸明胶、硫系玻璃半导体、光色晶体及光导热塑料等[3-6].对新的记录材料的要求是:应该有理想的感光灵敏度、分辨率、衍射效率;实时、原位显影;摆脱暗室操作…     

Directional Motion of Droplets in a Conical Tube or on a Conical Fibre

Manipulating the directional movement of liquid droplets is of significance for design and fabrication of some microfluidic devices, An energy-based method is adopted to analyse the directional movement of a droplet deposited in a conical tube or on a conical fibre. We perform an experiment to investigate the directional motion of a droplet in an open conical tube. Our theoretical analysis and experimental observations both demonstrate that surface tension can drive the droplet to move in the conical tube. The critical condition of the liquid moving in the conical tube is presented. We also analyse a droplet on a conical hydrophilic fibre, which can move from the thinner to the thicker end.