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1.
Reham Alabduljabbar 《计算机系统科学与工程》2022,40(1):1-15
It is a common observation that whenever patients arrives at the front desk of a hospital, outpatient clinic, or other health-associated centers, they have to first queue up in a line and wait to fill in their registration form to get admitted. The long waiting time without any status updates is the most common complaint, concerning health officials. In this paper, UrNext, a location-aware mobile-based solution using Bluetooth low-energy (BLE) technology is presented to solve the problem. Recently, a technology-oriented method, the Internet of Things (IoT), has been gaining popularity in helping to solve some of the healthcare sector’s problems. The implementation of this solution could be illustrated through a simple example of when a patient arrives at a clinic for a consultation. Instead of having to wait in long lines, that patient will be greeted automatically, receive a push notification of an admittance along with an estimated waiting time for a consultation session. This will not only provide the patients with a sense of freedom but would also reduce the uncertainty levels that are generally observed, thus saving both time and money. This work aims to improve the clinics’ quality of services, organize queues and minimize waiting times, leading to patients’ comfort while reducing the burden on nurses and receptionists. The results demonstrate that the presented system is successful in its performance and helps achieves a pleasant and conducive clinic visitation process with higher productivity. 相似文献
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自1980年第一台商品GPS信号接收机问世以来,GPS信号接收机不断更新换代,日新月异。综析了GPS信号接收机的新近发展,主要表现在下述方面:用软件无线电技术实现GPS信号接收机的软件化;用蓝牙技术实现GPS数据的无线传输;用通用无线分组业务(GPRS)扩展RTK移动站的作用距离;用SAASM技术直接捕获和跟踪P码;用内置增强跟踪技术研制成GPS/WAAS/EGNOS集成接收机。 相似文献
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室内蓝牙定位系统中基于众包的指纹数据库更新
田增山,从海峰,周牧
(重庆邮电大学 移动通信技术重庆市重点实验室,重庆 400064)
中文说明:
基于指纹的蓝牙定位是一种十分流行的室内定位技术。但是,蓝牙基站的位置或者是环境的变化会对信号分布产生极大的影响,这最终将导致蓝牙定位精度降低。人工收集带位置标签的指纹信息以建立和更新指纹库严重限制了蓝牙定位技术的广泛推广。为解决这个问题,本文提出一种指纹库自适应更新方法。首先,众包数据包含蓝牙接收信号强度(Received Signal Strength,RSS),行人的速度和航向将被记录下来。其次,这些被记录的众包数据将被卡尔曼滤波进行融合用于轨迹有效性分析,来实现为无地理位置标签的RSS分配标签生成候选指纹的目的。然后,当每个参考点获取到足够候选指纹,每个参考点的原始指纹和候选指纹将进行基于密度的聚类(Density-based Spatial Clustering of Applications with Noise ,DBSCAN)来滤除噪声,同时最大的一个类的指纹均值将被选为对应参考点更新后的指纹。最后,充分的实验结果表明随着候选指纹和更新次数的增加,基于指纹的蓝牙定位精度可以被逐渐提高。
关键词:室内定位,指纹库更新,众包数据,蓝牙,DBSCAN
相似文献4.
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For facility management, photography is an efficient and accurate method of recording the physical state of infrastructure. However, without an effective organizational scheme, the difficulty of retrieving relevant photos from historical databases can become overly burdensome for highly complex or long-lived assets. To make strategic decisions, it is crucial to retrieve the right information from a plurality of sources in a timely manner. The main objective of this paper is to present a method for organizing and retrieving photos from massive facility management photo databases using photo-metadata: photographed location, camera perspective, and image semantic content information. Indoor localization experiments were performed using Bluetooth technology to infer the location information. Perspective is inferred from the device’s on-board inertial measurement unit (IMU). Image semantic content is inferred using a Convolutional Neural Network (CNN)-based deep learning algorithm. Fusing these three features, seven query options were provided for the user when retrieving images. Leveraging Building Information Modeling (BIM) as a process and Geographic Information Systems (GIS) as a framework, this paper also envisions a federated information management by connecting 2D and 3D facility assets with our real-world map which can be smoothly bridged with our image retrieval system. The realization of the integrated application with BIM and GIS is significantly beneficial for the facility management domain by advancing the understanding of projects in a broader view with a federated data platform. In this research, the framework is illustrated with 21 institutional buildings within the University of Texas at Austin’s main campus, and the authors conclude that the proposed metadata-based image retrieval system can ultimately enhance the better-informed decision-making process through rapid information retrieval. 相似文献
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对蓝牙无线个域网的各项流量特性进行了分析,探讨了蓝牙设备在4种工作模式间的切换对蓝牙网络性能的影响,分析了影响蓝牙网络有效带宽的各个因素。另外,通过仿真,发现蓝牙无线链路流量特性具有自相似的特性,即适合采用自相似类型的流量模型来进行分析、描述及预测。 相似文献
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目前,在我国的电力、燃气、热力、自来水行业,大部分仍然采用无线远程集抄和手持抄表机的人工抄表模式。随着智能手机的普及,手机的功能和质量已经远远强于一般的数据采集手持设备。使用手机抄表软件可以轻松实现日常数据采集抄录工作。并可以使用手机的网络实现数据的及时上传下载。本文提供一种用于热量表的智能手机蓝牙抄表的抄收方法,该方法实现使用一部普通的android智能手机实现对热量表的抄读和设置。由于采取通用的智能手机平台,不依赖硬件设备,不需要定制产品,只需要额外加一个蓝牙转串口模块、采用相同的手机操作系统程序代码就可以通用,智能手机平台在编程工具方面都具有很好的扩展性,本方法在功能上扩展性强;智能手机平台在通信通道上有较强的延伸性,能够依照本方法搭建很好的解决方案,进行数据通信等。 相似文献
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