Evaluation of crystallinity in TiO2 films with mixed structures grown on MgO (001) substrates by argon-ion beam sputtering based on infrared reflection-absorption spectra

TiO2 films with thicknesses (d) above 15 nm were grown on optically polished surfaces of MgO (001) substrates held at 400 degrees C by sputtering a Ti target with an argon-ion beam when the partial pressure of O2 was kept at 1.1 x 10(-2) Pa. X-ray diffraction patterns show that TiO2 films with d < 56 nm are composed of an a-axis anatase-type structure, whereas those with d > 56 nm are composed of a mixture of phases with the c-axis parallel to the film surface. The thickness dependence of the infrared reflection-absorption spectra shows that TiO2 films with d < 56 nm are composed of both anatase and amorphous phases, whereas those with d > 56 nm are composed of anatase, rutile, and amorphous phases. The crystallinity in TiO2 films is also evaluated from the infrared reflection-absorption spectra by comparison of the observed and the calculated results determined from the dielectric function of anisotropic TiO2 bulk single crystal.     

Development of an 8‐bit VGA LCOS microdisplay with FSC modes using a low‐cost process

Abstract— A VGA‐resolution LCOS microdisplay operated in the field‐sequential color (FSC) mode was fabricated using a low‐cost process. An 8‐bit digital data driver with digital‐to‐analog converters, which can realize a 256‐level gray scale and gamma compensation, has been integrated into a color microdisplay. A top‐to‐bottom approach to the design of an FSC LCOS microdisplay is described. The design of the silicon‐backplane circuits is outlined in detail. Finally, a prototype of this display and its imaging performance are discussed.     

用LabWindows/CVI实现Moxa NPort Serve串口通讯的方法

介绍LabWindows/CVI环境下,基于TCP/IP的设备实现多串口通讯的方法。与其它开发串口通讯的方法相比,LabWindows/CVI中独有的、功能强大的RS232函数库使串口通讯更容易实现。     

数字城市中大楼的计算机三维重建技术

Introduction In the real life of today, it' s often necessary to com puterize the building view especially at the tim e of m aking policy,tendering and selling the building.To re- alize dynam ic show and m utual observation, it is a m ust reproducing the building three dim ensionally through com puter. R eproducing buildings in three dim ensions is a hot topic at present. To establish virtual reality there are a large num ber of m ethods, which differ in the conve- nience and flexibility to pr…     

ADO和LabSQL在数据库操作方面的应用

本文介绍了在Labview中应用ADO控件和第三方控件LabSQL对数据库操作的方案,解决了Labview中的数据库操作的问题.详细介绍了Access数据库的创建,数值的添加和查询显示,并将该技术成功应用于某设备的监控程序中.     

某航测相机的控制系统设计

就某航测相机控制分系统中的主要部分设计进行了比较详细的阐述。该相机控制系统主要包括测光机构控制、凸轮驱动控制、多快门同步控制、CCD相机同步控制、调光控制等部分。各部分依据控制流程,统一协调工作实现拍摄任务。     

在μC/OS-II中消除优先级反转

使用实时内核,优先级反转是实时系统中出现最多的问题。为了防止这种现象的发生,内核必须能够自动变换任务的优先级,目前比较有效的方法有优先级继承和优先级顶置等。而作为一个优秀而应用广泛的实时内核,μC/OS-II没有防优先级反转的机制。基于此,首先分析了优先级反转及解决方法,然后提出如何对μC/OS-II的调度算法进行扩展,使其支持优先级顶置协议,从而良好解决了该实时系统中的优先级反转问题,提高了系统的实时性能。     

普及计算环境的设备灵活接入技术研究--基于OSGi的数字家庭解决方案

普及计算使人们能通过各类智能计算设备，随时随地获得各种所需的信息服务。作为普及计算的一个重要的应用领域，数字家庭将家庭内各种家电和设备联网，通过网络为人们提供丰富、个性化、方便、安全和高效的服务。而如何达到各种智能设备的灵活接入，成了实现此目标的一个关键问题。在和。SVA-IBM联合实验室合作iHome项目中，作者对此进行了深入的研究。本文提出了基于OSGi的数字家庭普及计算环境智能计算设备灵活接入解决方案，并实现了一个应用的系统，从而验证其可行性。     

虎杖活性成分的提取与分离

通过实验研究确定了虎杖活性成分的提取和分离条件：用质量8倍于虎杖粗粉,浓度为80%乙醇,温度60 ℃,浸渍3次,每次2 h,提取率为96.3%.再经硅胶柱层析分离虎杖乙醇的提取物,氯仿-甲醇梯度洗脱[V（氯仿）：V（甲醇）=9.8 ： 0.2 ～ 7.0 ： 3.0].薄层层析检测得到5种单体：大黄素甲醚、大黄素、大黄酸、白藜芦醇和白藜芦醇苷.以虎杖饮片为基准,得率分别为0.03%、0.92%、1.56%、2.0%和1.41%.     

心电信号中工频干扰的最小二乘估计和消除

心电图(ECG)分析对心血管疾病的诊断是十分重要的。但所测得的心电信号经常受到各种干扰的影响,其中由电源引起的工频干扰影响最大。本文应用非线性方程组的最小二乘解法估计工频干扰,从而将其从心电信号中消除。与CramerE提出的最小二乘估计方法相比,本方法的计算公式更为通用,所需的已知条件较少且无须进行估计前的预处理工作。