高职院校毕业论文格式排版系统开发

主要讨论高职院校的学生毕业论文排版系统开发方面的问题。首先从实际应用角度出发,阐述开发的本系统的意义,接着结合本校的论文格式要求讨论该系统的结构及具体的模块设计。最后对本系统在本校的实际应用情况进行小结。     

用ATL开发异步调用组件

异步与分布式应用软件系统在工程领域有着广泛的应用,有必要寻找一种快速高效地构筑异步系统的方法,微软的组件对象模型COM可以很好地满足这方面的需要。首先概述开发异步调用组件的意义和工具,以及所涉及到的COM基本概念,包括接口、事件、连接点、线程模型等,并结合一个具体工程实例详述了在Visual C++6.0编程环境下用ATL开发异步调用组件的方法,最后对组件进行了测试并顺利通过,证明了COM开发此类异步应用系统的高效性。     

C#.NET下三层架构数据库应用系统开发调试分析

基于C#.NET三层架构下的数据库系统是一种方便快速的开发模式,具有高性能的可重复性和可维护性,是一类灵活的事务处理机制。因此广泛的应用在一些web数据库开发系统中。为解决C#.NET条件下建立三层架构数据库应用系统时通常遇到的问题,阐述在建立三层架构数据库应用系统的标准流程,并提出变化条件下数据库设计过程中变化的三层架构程序修改方法,对不易修改但是较常见的编译错误进行解决。     

缩微资料数字化管理系统的开发与应用

介绍了缩微资料数字化管理系统软件。系统的开发应用了多层应用体系结构,数据库的设计中应用了分布式管理机制,确保表格结构和表格之间的相互依赖关系。在软件的编制中采用模块化开放式结构。便于系统的功能扩展。ASP技术的运用满足了管理系统的网络化需求,实现了多机联网目录检索。该系统已在军队院校图书馆推广使用。     

居民身份证登记指纹信息直报系统设计与实现

本文通过身份证登记指纹信息直报系统开发过程中,引入了ASP.NET三层架构的开发模式,并通过三层架构模式原理实现了系统的开发,其中重要的查询统计报表功能开发是基于目前微软流行的RDLC组件报表开发的,最后给出了系统通过对数据库优化设计和系统安全的开发过程,提高了直报系统的查询、统计速度和系统安全性、可靠性。     

基于NHibernate的客户登录系统的实现

研究一个客户登录系统的实现,该系统是在visual studio.net2005下使用c#语言、SQL server2000数据库进行开发.首先介绍系统的开发背景以及研究价值,其次,介绍开发环境、语言及数据库,最后,叙述系统设计的实现.     

数据库在某光电设备自动检定中的应用

本文介绍了一种光电设备自动检定系统的设计方法,论述了该系统软件部分的设计,系统数据库的设计思路,及其建立、管理与维护。着重说明了建立数据库时数据库各表间的关系连接。文中以数据的多种匹配查询,具体阐述了自动检定系统数据库的开发与应用。     

光电设备自动检定数据库管理系统设计

本文介绍了一种光电设备自动检定数据库管理系统的设计方法．论述了该系统数据库的结构，及其建立、管理与维护。着重说明了建立数据库时数据库各表间的关系连接。文中以数据的多种匹配查询具体阐述了自动检定系统数据库的开发与应用。     

虚拟维修训练系统中数据库的应用

数据库技术在虚拟维修训练系统中起着重要的作用。文章以MySQL数据库为例简述了数据库特点,分析了应用数据库的虚拟维修训练系统的优势,介绍了虚拟维修训练系统中数据库设计的基本方法,结合Torque Game Engine三维引擎开发了具有较好可移植性的虚拟维修训练系统。实验结果表明,将数据库技术应用到虚拟维修训练系统,可以有效提高系统开发的效率。     

软件应用体系结构模型研究

随着信息时代的来临以及计算机的高度普及,大型的软件系统越来越多的出现在我们周围,这给我们带来的极大的便利。计算机软件的应用体系结构模型,是一种帮助计算机软件增强系统的开放性、复用性和集成性的有效助力,被大规模的应用在商业软件系统的开发过程。现今阶段常见的有三种计算机软件应用体系结构模型,这三者分别是单层应用体系结构模型、双层计算机应用体系模型和多层计算机应用体系模型。本文针对这三者各自的特点进行简要探讨,介绍了各自的优劣,从综合角度上来看,推荐使用多层的应用体系结构模型。     

Multiple-source optical diffusion approximation for a multilayer scattering medium

A method for improving the accuracy of the optical diffusion theory for a multilayer scattering medium is presented. An infinitesimally narrow incident light beam is replaced by multiple isotropic point sources of different strengths that are placed in the scattering medium along the incident beam. The multiple sources are then used to develop a multilayer diffusion theory. Diffuse reflectance is then computed using the multilayer diffusion theory and compared with accurate data computed by the Monte Carlo method. This multisource method is found to be significantly more accurate than the previous single-source method.     

Overview and applicability of residual stress estimation of film-substrate structure

Residual stresses arising from thermal mismatch in layered structures rank among the major causes of mechanical failures in light-emitting diodes, integrated circuits, electronic packages, and micro-electro-mechanical systems. Applying analytical solutions to predict or calculate residual stresses’ magnitude and distribution in multilayer film-substrate system has been widely adopted by many researchers. These researches are based on multilayer theories of film-substrate systems, such as Suhir's formula, Stoney's equation, and extend Stoney's equations. To discuss and distinguish the characteristics of these approaches, finite element analysis numerical solutions and multilayer theory analytical solutions are compared and analyzed. This encompasses the theories’ application spectrum as well as their prediction capability. In addition, this work not only discusses the theories’ property and workability but also demonstrate the feasibility of the finite element method (FEM) and bilayer theories in experiment. The experimental result demonstrates that FEM is a reliable approach in predicting the mechanical behavior of multilayer structures. Hence, when calculating or predicting thin film stress using the aforementioned theories, the methodology proposed in this research can be employed to effectively validate the feasibility of these theories.     

正交各向异性多层夹芯层板理论

正交各向异性多层夹芯层板具有较好的强度、刚度和稳定综合性能,已在一些重要承力结构(如复合材料桥)中应用。本文建立的分析理论,考虑板层和芯层为正交各向异性,各层材性和厚度可以不同,各芯层角变形可以不等的较普遍情况,而目前流行的单夹芯板的Hoff理论和Reissner理论只是本理论简化的一种特殊情况。      

General theory of sub-quarterwave multilayers with highly absorbing materials

A general theory of multilayers with enhanced reflectance has been developed based on the superposition of sub-quarterwave layers of various highly radiation-absorbing materials. The theory has been developed by second-order expansion of the multilayer reflectance with respect to the optical-constant differences between the materials in the multilayer. The current paper completes and improves the theory that was developed in a previous paper [J. Opt. Soc. Am. A 18, 1406 (2001)] by including the case of nonnormal incidence and general radiation polarization and by providing more-accurate film thickness values of the optimized multilayer than with the previous theory. The theory provides an accurate approach to the design of a new concept of multilayer coatings with more than two materials. The new multilayers are adequate to enhance the reflectance of the materials particularly in the far and the extreme ultraviolet.     

The thermal conductivity of cryogenic insulation materials and its temperature dependence

For the presentation of the thermal conductivity of cryogenic insulation materials and their integral mean values an empirical function is suggested, with which experimentally found values can be extrapolated to other temperature levels.The selection of materials includes granulated and fibrous insulations under atmospheric pressure as well as under vacuum and a multilayer insulation for most high performances.It is shown theoretically, how the constants in the empirical function can be determined. Their calculation is demonstrated practically by using real measurements.For a multilayer insulation a theory is developed, with which a measured value can be extrapolated to other temperatures, gas pressures and numbers of layers. Its application to a real insulation system is demonstrated too.The results are listed in a tabular summary.     

Equivalent refractive index of multilayer films of different materials

The variation of the equivalent refractive index with composition of multilayer films of ZnS-MgF₂-SiO, ZnS-Na₃AlF₆ and Ge-ZnS, prepared by depositing alternate layers of different materials, has been investigated. It has been established that, for small step thicknesses (much less than the wavelength of light to be used for measurements) of each layer, the composite multilayer films are optically equivalent to homogeneously mixed films of the same materials of corresponding relative compositions. Further, the results show that the indices of the multilayer films of ZnS-MgF₂-SiO and ZnS-Na₃AlF₆ are in good agreement with the values predicted on the basis of the Lorentz-Lorenz theory. The refractive index of Ge-ZnS multilayer films is in agreement with the Drude theory. Our studies also show that the refractive index of a multilayer film composed of three materials, two of which react chemically in the molten and vapour states, as, for example, ZnS and SiO in ZnS-MgF₂-SiO films, is equivalent to that expected theoretically for a homogeneously mixed film of the same materials. The controlled and predictable equivalent behaviour of multilayer films suggests their use to produce variable refractive index optical coatings by selecting any number of materials which may or may not react with each other chemically.     

Multilayer Transitions in Spin-3/2 Blume–Capel Model with RKKY Interaction in a Transverse Field

Using mean-field theory, we have studied the effect of quantum transverse field on the magnetic properties and multilayer transitions in the spin-3/2 Blume–Capel model with RKKY interaction. The system is formed by two magnetic multilayer materials, of different thicknesses, separated by a non magnetic spacer of thickness M. It is found that there exist critical transverse fields above which the multilayer transitions occur. This critical value decreases when increasing the thickness of the nonmagnetic spacer M. Phase diagram is established in different plane of space parameter.     

材料设计的发展新趋势——材料设计计算方法

计算机计算技术和量子理论等领域的发展,使材料住处数据系统,热力学方法,分了疲乏量子理论乃至神经网络方法,拓扑几何都应用于材料设计中,采用计算方法进行材料设计上具人经验、高效及预测功能的特点,该方法将成为材料设计发展的重新趋势。     

镀有非对称交替膜系的玻璃颜色特性研究

本文对镀有非对称折射率高低交替膜系的玻璃的颜色特性进行了研究。比较了不同的膜系结构形式,通过改变每层膜的厚度,可得到的不同的色品坐标。发现镀的玻璃上的第一层膜为高折射率材料所得到的玻面颜色好。灾个结论可应用到玻璃装饰业上。     

Efficiencies of master, replica, and multilayer gratings for the soft-x-ray-extreme-ultraviolet range: modeling based on the modified integral method and comparisons with measurements

The near-normal-incidence efficiencies of a 2400-groove/mm holographic master grating, a replica grating, and a multilayer grating are modeled in the soft-x-ray-extreme-ultraviolet (EUV) regions and are compared with efficiencies that are measured with synchrotron radiation. The efficiencies are calculated by the computer program PCGrate, which is based on a rigorous modified integral method. The theory of our integral method is described both for monolayer and multilayer gratings designated for the soft-x-ray-EUV-wavelength range. The calculations account for the groove profile as determined from atomic force microscopy with a depth scaling in the case of the multilayer grating and an average random microroughness (0.7 nm) for the short wavelengths. The refractive indices of the grating substrate and coatings have been taken from different sources because of the wide range of the wavelengths (4.5-50 nm). The measured peak absolute efficiency of 10.4% in the second diffraction order at a wavelength of 11.4 nm is achieved for the multilayer grating and is in good agreement with a computed value of approximately 11.5%. Rigorous modeling of the efficiencies of three similar gratings is in good overall agreement with the measured efficiency over a wide wavelength region. Additional calculations have indicated that relatively high normal incidence efficiency (of at least several percent) and large angular dispersion in the higher orders can be achieved in the 4.5-10.5-nm range by application of various multilayer coatings.