共查询到20条相似文献,搜索用时 120 毫秒
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为了解决传统温室有线监控系统组网复杂、无法实现远程监控等缺点,在已有硬件架构基础上加入无线收发模块,设计开发基于Web的温室环境无线监控平台。该平台利用.net面向对象编程技术以及SQL Server数据库技术,采用客户端/服务器(C/S)和浏览器/服务器(B/S)两种架构方式实现温室数据实时采集、远程监控等功能。整个监控系统电路简单、扩展性强、实现远程控制,具有良好的应用前景。 相似文献
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总结调度信息自动化的现状,阐明了以WEB-浏览器/服务器(B/S)模式代替客户机/服务器(C/S)模式应用于新型调度信息系统所带来的优越性,简单介绍了基于B/S模式的调度信息系统的结构以及功能特点。 相似文献
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介绍了一个基于LabVIEW和IAP(In Application Programming,在应用编程)技术的远程交互式单片机开发实验系统。系统采用浏览器/服务器(B/S)技术,用户可以在任何Internet终端访问系统,可以远程构建真实的电路、远程下载程序至现场单片机中进行单片机实验,甚至进行项目的设计开发。用户不仅可以观察到实时实验现象,而且可以对实验电路进行实时动作,如按键操作、电位器调节等。 相似文献
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针对油井液位远程测试系统中现场嵌入式设备计算资源不足和不能满足远程实时监控的问题,本文基于云计算技术,设计和实现了一套嵌入式云测试系统.基于亚马逊公司的Eucalyptus(桉树)云平台实现了云测试监控中心的功能.测控现场端采用STM32F103微处理器和S3C2440A微处理器实现了测控节点和嵌入式测控服务器的硬件开发,嵌入式测控服务器在嵌入式Linux操作系统的支撑下,通过KVM、QEMU实现了测试设备的虚拟化,测控节点和测控服务器之间采用Modbus通信协议.系统实现了实时测试和远程实时测控的功能,测试结果表明,能满足实际应用的需求. 相似文献
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近年来,国家实施了"西新工程",加大了对新疆广播电视事业的建设和投入。建立一个全面、实用、快捷、有效的广播电视节目内容监测系统,必须运用当前先进的数字压缩、网络通讯、视音频比对、智能比对、关键词识别、数据库等技术,采用不同的组网方案,来构建节目内容监测系统的监测方式。通过实时监测、轮询监测、任务监测来达到效果,该系统采用面向服务的架构SOA,基于XML统一标准的系统结构。系统在逻辑上采用基于.Net FrameWork规范的B/S/S(浏览端/服务器/服务器)三层结构模型来设计,形成了整体技术解决方案。 相似文献
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Jinman Kim Weidong Cai Stefan Eberl Dagan Feng 《IEEE transactions on information technology in biomedicine》2007,11(2):161-169
Three-dimensional (3-D) visualization has become an essential part for imaging applications, including image-guided surgery, radiotherapy planning, and computer-aided diagnosis. In the visualization of dual-modality positron emission tomography and computed tomography (PET/CT), 3-D volume rendering is often limited to rendering of a single image volume and by high computational demand. Furthermore, incorporation of segmentation in volume rendering is usually restricted to visualizing the presegmented volumes of interest. In this paper, we investigated the integration of interactive segmentation into real-time volume rendering of dual-modality PET/CT images. We present and validate a fuzzy thresholding segmentation technique based on fuzzy cluster analysis, which allows interactive and real-time optimization of the segmentation results. This technique is then incorporated into a real-time multi-volume rendering of PET/CT images. Our method allows a real-time fusion and interchangeability of segmentation volume with PET or CT volumes, as well as the usual fusion of PET/CT volumes. Volume manipulations such as window level adjustments and lookup table can be applied to individual volumes, which are then fused together in real time as adjustments are made. We demonstrate the benefit of our method in integrating segmentation with volume rendering in its application to PET/CT images. Responsive frame rates are achieved by utilizing a texture-based volume rendering algorithm and the rapid transfer capability of the high-memory bandwidth available in low-cost graphic hardware. 相似文献
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基于GPU的虚拟内窥镜场景实时绘制算法 总被引:1,自引:0,他引:1
为满足影像引导手术(IGS)中高分辨率、海量数据的实时渲染,提出一种基于GPU的虚拟内窥镜场景实时绘制算法。该算法针对虚拟内窥镜渲染数据的特点(管腔数据占总数据比例小,5%左右),首先对图像进行自动分割,得到管腔组织的分割数据;仅将分割后的数据一次载入图像显存,利用光线投射算法进行渲染,并在多GPU负载方面做了优化。充分利用GPU渲染和并行计算的能力,实现了海量数据(1 024×1 024×1 024)的实时渲染。 相似文献
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基于Kinect的实时深度提取与多视绘制算法 总被引:4,自引:3,他引:1
提出了一种基于Kinect的实时深度提取算法和单纹理+深度的多视绘制方法。在采集端,使用Kinect提取场景纹理和深度,并针对Kinect输出深度图的空洞提出一种快速修复算法。在显示端,针对单纹理+深度的基于深度图像的绘制(DIBR,depth image based rendering)绘制产生的大空洞,采用一种基于背景估计和前景分割的绘制方法。实验结果表明,本文方法可实时提取质量良好的深度图,并有效修复了DIBR绘制过程中产生的大空洞,得到质量较好的多路虚拟视点图像。以所提出的深度获取和绘制算法为核心,实现了一种基于深度的立体视频系统,最终的虚拟视点交织立体显示的立体效果良好,进一步验证了本文算法的有效性。本文系统可用于实景的多视点立体视频录制与播放。 相似文献
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《Journal of Location Based Services》2013,7(2):79-99
3D virtual environments are increasingly used as general-purpose medium for communicating spatial information. In particular, virtual 3D city models have numerous applications such as car navigation, city marketing, tourism and gaming. In these applications, points-of-interest (POI) play a major role since they typically represent features relevant for specific user tasks and facilitate effective user orientation and navigation through the 3D virtual environment. In this article, we present strategies that aim at effectively visualising POI in a 3D virtual environment used on mobile devices. Here, we additionally have to face the ‘keyhole’ situation, i.e. the users can realise only a small part of the environment due to the limited view space and resolution. For the effective visualisation of POI in 3D virtual environments we propose to combine specialised occlusion management for 3D scenes together with visual cues that handle out-of-frame POI. We also discuss general aspects and definitions of POI in the scope of 3D models and outline a prototype implementation of the mobile 3D viewer application based on the presented concepts. In addition, we give a first performance evaluation with respect to rendering speed and power consumptions. 相似文献
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随着基于位置的社交网络(LBSN)技术的快速发展,为移动用户提供个性化服务的兴趣点(POI)推荐成为关注重点。由于POI推荐面临着数据稀疏、影响因素多和用户偏好复杂的挑战,因此传统的POI推荐往往只考虑签到频率以及签到时间和地点对用户的影响,而忽略了签到序列中用户前后行为的关联影响。为了解决上述问题,该文通过序列的表示考虑签到数据的时间影响和空间影响,建立了时空上下文信息的POI推荐模型(STCPR),为POI推荐提供了更精准的个性化偏好。该模型基于序列到序列的框架下,将用户信息、POI信息、类别信息和时空上下文信息进行向量化后嵌入GRU网络中,同时利用了时间注意力机制、全局和局部的空间注意力机制来综合考虑用户偏好与变化趋势,从而向用户推荐感兴趣的Top-N的POI。该文通过在两个真实的数据集上实验来验证模型的性能。实验的结果表明,该文所提出的方法在召回率(Recall)和归一化折损累计增益(NDCG)方面优于几种现有的方法。 相似文献
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Jeffrey R. Blum Mathieu Bouchard Jeremy R. Cooperstock 《Mobile Networks and Applications》2013,18(3):295-309
Numerous projects have investigated assistive navigation technologies for the blind community, tackling challenges ranging from interface design to sensory substitution. However, none of these have successfully integrated what we consider to be the three factors necessary for a widely deployable system that delivers a rich experience of one’s environment: implementation on a commodity device, use of a pre-existing worldwide point of interest (POI) database, and a means of rendering the environment that is superior to a naive playback of spoken text. Our “In Situ Audio Services” (ISAS) application responds to these needs, allowing users to explore an urban area without necessarily having a particular destination in mind. We describe the technical aspects of its implementation, user requirements, interface design, safety concerns, POI data source issues, and further requirements to make the system practical on a wider basis. Initial qualitative feedback from blind users is also discussed. 相似文献
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绝缘体上压电基板(POI)是一种新兴的压电单晶复合薄膜结构材料。POI基板由压电单晶材料薄层(单晶钽酸锂/铌酸锂)、二氧化硅层及高阻硅衬底构成,采用Smart-Cut工艺制备,可保证板层高均匀度及高质量的批量生产。通过这种基板可设计满足5G通信要求的高性能集成声表面波(SAW)谐振器和滤波器。基于POI材料制备的SAW器件具有高频、高品质因数(Q)值、低温度敏感性及较大带宽等优良特性,同时还能在同一芯片上集成多个SAW滤波器,具有广阔的市场应用前景。该文介绍了POI基板的制备、国内外的研究现状及POI基板在高性能SAW滤波器中的应用,综述了制备POI基板的关键技术并展望了未来的发展趋势。 相似文献