找到约10000个结果。
英语原文共 9 页, 桥梁结构疲劳分析与寿命预测健康监测数据-第一部分:方法和策略 土木及结构工程学系,香港理工大学,香港九龙 于1999年9月20日收到,2000年4月4日收到修订后的版本,2000年6月9日接收 【摘要】 本文的目的是开发一种方法和策略,对现有桥梁的桥梁桥面部分的疲劳损伤评估和寿命预测的在线结构健康监测数据。基于连续损伤力学模型建立了疲劳损伤模型,对现有桥梁的疲劳损伤进行评估。提出了桥梁结构疲劳应力分析的结构模型,在结构模型中,采用弹性构件和可能的累积损伤焊接连接。基于所提出的模型,提出了基于一个在线结构健康监测系用和CDM疲劳模型得到的历史应变数据评估桥梁结构的疲劳损伤和寿命的分析方法。未来的在线监测数据的局部应力周期的代表性块的更新被包括在计算方法中。为
英语原文共 16 页, 实验室基于视图的电子学习门户虚拟实验室传质操作 Agarwal;;Ramgopal Uppaluri;;Anil Verma CSI Transactions on ICT 摘要:章中,介绍了虚拟实验室质量传递的独特概念,一个练习,由IIT古瓦哈蒂的赞助下人力资源和发展(MHRD)国家通过ICT教育任务。虚拟实验室质组成八种不同虚拟实验室模块,涵盖各个方面的传质操作,化学工程的一个关键主题教育和实践。虽然都是基于仿真模块,除了最基本的虚拟实验室模拟,虚拟实验室模块本质上包括所有方面的虚拟实验室教育即理论,实验过程中,动画、测验等虚拟实验室环境启用一种改进的化学工程的学习,学习往往是更好的通过实践和反复实验/观察在真实世界的场景中。此外,野外小径和用户友好的工作坊也被组织获得实时反馈,这些都是非常有利于提高质量的技术内容以及学习虚拟实验室
英语原文共 15 页, 利用高光谱成像和神经网络检测寒害红元帅苹果 摘要: 利用高光谱成像(400-1000纳米)和人工神经网络(ANN)技术进行了对红元帅苹果的寒害的检测和研究。这个高光谱成像系统的建立是为了获取和预处理苹果的图像,以及提取苹果的光谱特性。向前反馈传播人工神经网络模型来选择最佳的波长(S),对苹果进行分类,并检测因受寒害而使苹果坚定性发生的变化。人工神经网络选择的五个最佳波长为717,751,875,960和980纳米。将人工神经网络模型进行分组,分成了培训,测试和验证用的水果不同的组,以评估模型的鲁棒性。与另外选择的五个最佳波长的光谱和空间的反应,98.4%的平均分类精度为正常和受伤的水果区分实现的。测量和预测硬度值之间的相关系数分别为0.93,0.91和0.92是培训,测试和验证
英语原文共 9 页, 虚拟现实: 新兴的应用和未来的发展方向 摘要:虚拟现实是一种新兴技术,它使得虚拟浸入式环境在学校、学院和大学的教育中快速扩张和发展。本文介绍了虚拟现实的概述,描述了一些当前被特殊教育工作者用于对专科学院和高校的人员编制以及为在k-12学校和社区服务中心的残疾儿童和成人提供服务的应用程序,并讨论了虚拟现实的应用及其对农村特殊教育的未来发展的方向。 关键词:虚拟现实、虚拟环境、教育模拟 许多人认为虚拟现实(VR)是一个与科幻电影、电视剧、小说有关的未来技术。但是,事实上大多数人已经体验过今天的虚拟现实应用,也许通过玩电脑游戏、在一个博物馆参与一个模拟的经验、在当地的剧院观看一个人造的三维(3D)动作电影或在智能手机上使用一个增强现
LabVIEW For Everyone Virtual instrumentation is the foundation for the modern laboratory. Its also what we call a LabVIEW program. Because their functionality is software-defined by the user, virtual instruments are extremely flexible, powerful, and cost-effective. A virtual instrument consists of a computer, software, and modular hardware; all combined and configured to emulate the function of traditional hardware instrumentation. Although LabVIEW is a very powerful simulation tool, it is most often used to gather data from an external source, and it contains many VIs built especially for this purpose. For example, LabVIEW can command plug-in data acquisition, or DAQ, devices to acquire or generate analog and digital signals. You might use DAQ devices and LabVIEW to monitor a temperature, send signals to an external system, or determine the frequency of an unknown signal. LabVIEW also facilitates data transfer over the General Purpose Interface Bus (GPIB), or through your c
A deployment procedure for wireless sensor networks Abstract Since the wireless signal is invisible and unpredictable, the deployment issue for a wireless sensor network (WSN) becomes a critical task. In this paper, a procedure of deployment for a wireless sensor network in an indoor environment is proposed. The objective of the procedure is to provide a solution guide for people who don,t have sufficient wireless communication knowledge and experience in how to correctly place the wireless sensor nodes or devices in the interesting indoor environment, especially in a large-scale deployment case, and then the desired communication performance of the wireless sensor network can be achieved. The addressed deployment procedure is divided into four sub-procedures and is discussed in detail in the following. A deployment plan for an office and the real deployment testing results are then proposed to demonstrate the efficiency of the proposed deployment procedure. 1 Introduc
外文原文 Overview of JSP Technology Benefits of JSP JSP pages are translated into servlets. So, fundamentally, any task JSP pages can perform could also be accomplished by servlets. However, this underlying equivalence does not mean that servlets and JSP pages are equally appropriate in all scenarios. The issue is not the power of the technology, it is the convenience, productivity, and maintainability of one or the other. After all, anything you can do on a particular computer platform in the Java programming language you could also do in assembly language. But it still matters which you choose. JSP provides the following benefits over servlets alone: bull; It is easier to write and maintain the HTML. Your static code is ordinary HTML: no extra backslashes, no double quotes, and no lurking Java syntax. bull; You can use standard Web-site development tools. Even HTML tools that know nothing about JSP can be used because they simply ignore the JSP tags. bull; You ca
Digital Image Processing and Edge Detection Digital Image Processing Interest in digital image processing methods stems from two principal application areas:improvement of pictorial information for human interpretation; and processing of image data for storage, transmission, and representation for autonomous machine perception. An image may be defined as a two-dimensional function, f(x, y), where x and y are spatial (plane) coordinates, and the amplitude of f at any pair of coordinates (x, y) is called the intensity or gray level of the image at that point. When x, y, and the amplitude values of f are all finite, discrete quantities, we call the image a digital image. The field of digital image processing refers to processing digital images by means of a digital computer. Note that a digital image is composed of a finite number of elements, each of which has a particular location and value.These elements are referred to as picture elements,image elements, pels, and pixel
英语原文共 12 页, 建立地理空间数据库分析欧洲铁路(1830-2010) —— 历史GIS方法 摘 要 GIS是一种工具。我们可以用它学习发生在地球表面的各种现象分部的逻辑。在这篇文章中,我们旨在探索它在长期历史研究中的潜力。这里,我们开发出一种历史GIS系统关于在1830-2010时期的欧洲地铁。使用传统分析以便估量地铁的地域性影响和人口分布的影响。这是一种对于这种需求的回应。这项工作主要的内容:宣传空间数据应用的延伸;解释方法以便更好得开发系统;强调一些通过它已经获得的结论。迄今为止,在研究该铁路的地域影响方面,HGIS所提供的可能性还很少被探讨。类似的,到现在,在欧洲范围内几乎没有工作在这个领域里。因此,本HGIS最具创新性的方面在于所使用的方法和所处理的主题。 关键字 地铁;历史GIS;历
英语原文共 14 页, 附录X 译文 景观规划工具:利用不同用户生成的数字足迹规划风景旅游路线 摘要 为了方便前往城市的旅行准备过程,已经做了很多工作来自动推荐POI或一系列POI,以满足用户的需求。但是,大多数现有工作都忽略了规划POI之间详细旅行路线的问题,而将任务留给了在线地图服务或商用GPS导航仪。就建议最短的旅行距离或时间而言,这样的服务或导航器不能满足用户的多样化要求。例如,在以休闲驾驶为目的旅行的情况下,沿着旅行路线的风景对用户来说非常重要,并且良好的规划服务应该将路线的风景置于优先位置,而不是距离或花费的时间。为此,在本文中,我们提出了一个名为ScenicPlanner(景观计划工具)的新颖框架,用于路线推荐,它结合了带有地理位置标记的图像和可从位置检入的数字足迹。基于社
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