GIS技术和数字化测绘技术在工程测量中的运用

随着现代科技和信息化的不断发展,各个行业的运转速度也不断加快。在工程项目领域,引入现代化的科技设备和技术,能够提升工程质量和节约成本,并能在一定程度上缩短工期。工程测量时工程项目的基础环节直接影响后续工作的开展。文章以工程测量为基础,分析了GIS技术和数字化测绘技术的具体含义和重要性,并深入分析其在工程测量领域中的应用,为工程测量的应用提供参考。     

数字化测绘技术在工程测量中的应用研究

测绘技术是建筑、水利、工程施工前期测量工作的重要基础,随着数字化技术在测绘领域应用的不断深入,逐渐形成了一套更加精确化、智能化的数字化测绘技术体系,对比传统工程测量技术而言具有显著质量与效率优势。因此,文章简单概述了数字化测绘技术的发展现状及发展趋势,同时基于数字化测绘技术优势,明确了数字化测绘技术在工程测量中的应用方向,并以具体的文物古迹修复工程测量工作为例,探讨了具体的数字化测绘技术应用方案。     

GPS测量技术及其在工程测量中的应用

GPS的出现给测绘领域带来了前所未有的变革.GPS被广泛地应用于大地测量、控制测量等领域,而在工程测量领域,GPS技术同样发挥着巨大的作用,这不但使工程测量的效率大大地提升,而且使工程测量的稳定性增强,进而大大地提高工程测量的准确性与精度.为此,本文阐述了GPS测量技术的特点,以及GPS测量技术在工程测量中的应用.     

GPS-RTK技术在输电线路测量中的应用

在电力系统中,电力的传输需要通过电力线路来完成,是电力系统的重要组成部份。输电线路工程在实施前,必须对输电线路工程进行设计,并根据线路工程的不同设计阶段,对线路采用相应的测量方式,以满足设计要求。勘察测量工作贯穿了输电线路从可研设计到施工的各个阶段,对线路的设计、建设具有重要的指导作用。GPS-RTK技术是当前比较先进的测量技术,与人工测量和其他测量技术相比更加精确,能够实现动态定位。在输电线路的测量过程中,加强对GPS-RTK技术的应用,是提高电力输配线路建设水平的重要途径。     

探讨工程测量中RTK技术的应用及其中存在的问题

现代社会的进步,国家对于建设事业的重视程度也越来越深,各项建设工程成为了极为普遍的现象。在开展不同的项目工程之前,需要对其所处地区进行相应的工程测量,全面掌握其基本情况,就需要应用到实施动态测量技术。其作为现代较为先进的工程测量技术,其属于常用的GPS测量方法,能够有效的提高测量的准确度和人员的工作效率。本文简单分析了其技术RTK的应用,包括一般的控制测量、测量水体中的地形、地籍测量、数字化地图的测量、工程放样测量等,并提出几点问题,为进行工程测量的人员提供一定的参考与借鉴。     

无人机航测技术在工程测量中的应用分析

随着科学技术的进步和经济的发展,无人机航拍技术被越来越多地应用于各个领域,尤其是在工程测量领域,更是倍受青睐。其体积小、机动灵活、易于操作等特点,为无人机在工程测量中的实际应用中提供了便利。无人机技术的使用,不但可以极大地提高测量工作的效率,而且可以提高数据采集的准确性,为工程的顺利进行提供了保证。通过对无人机航测技术在工程测量中的应用优势分析可以推测,在将来无人机航测技术的应用范围将越来越广阔。     

浅析智能全站仪自动照准精度在核电工程测量中的应用与研究

随着科技时代的快速发展,智能全站仪在测量领域的应用越来越广泛。在核电工程测量中,采用了大量的高精度智能全站仪(如Leica MS60,TS60等)。在高精度智能全站仪的协助下,既可以提高工作效率,减少人员投入,还能提高现场测量放样的精度,且其与人工照准相比更加稳定。文中讨论了人工照准与智能ATR技术的测量精度,然后对两种Leica高精度智能全站仪进行测量对比,在不同条件下进行了多次实验,验证了ATR智能照准技术更加稳定可靠。     

工程测量技术的发展与应用研究

随着社会的发展以及科学技术的革新,工程测量技术得到了巨大的进步。经过长时间的不断发展,工程测量技术已经逐渐趋于成熟,对推动我国国民经济建设作出了突出贡献。在计算机技术迅速发展的背景下,工程测量技术领域涌现出诸多新型的测绘工程测量技术,与传统的测量技术相比,这些新兴技术有着非常多的优势,值得在实践过程中得到推广应用。本篇论文主要对工程测量技术在新时期的发展及其应用进行了分析与探讨。     

基于光学显微视觉的精密定位测量综述（特邀）

精密定位测量旨在针对微动目标实现微纳米精度的定位与小尺度操纵,其作为一种重要的测量技术,在工业生产、半导体制造等高端装备领域得到广泛应用。与其他测量方法不同,光学显微视觉测量技术因具备交互性强、扩展性强的特征而广泛应用于精密测量中。对基于光学显微视觉的精密定位测量技术进行分析与综述。首先,介绍光学显微视觉系统的成像模型与工作原理。其次,根据是否基于标靶图案的特征,对显微定位测量算法进行分类;同时,根据标靶图案的周期特征进行进一步的分类与探究,讨论其在不同标靶图案下的性能指标。最后,总结光学显微视觉定位测量方法在不同领域的应用与前景。该综述旨在为研究人员提供关于光学显微视觉精密定位测量技术的发展状态与趋势,促进微纳尺度定位测量技术的发展。     

计算机数字化测绘技术在工程测量中的应用

近年来,随着社会经济的快速发展,在工程测量领域中越来越多的先进技术得到广泛应用.但传统测绘技术已无法满足社会经济发展需求,逐渐被数字化技术所取代.在测量仪器智能化发展中,数字化测绘技术因其特有的优势而在工程测量中得到大量使用,并发挥着极其重要的作用.与此同时,测量工作人员还需对自身知识结构进行不断优化,对专业素养进行有效提升,不断加强实践操作能力,使自身能够满足不同阶段的发展需求,让数字化测绘技术的发展得到进一步提升.为此,本文主要对数字化测绘技术的概述、特点及应用进行了分析与探究.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.