Results 41 to 50 of about 27,428,987 (129)

Dual MIMU Pedestrian Navigation by Inequality Constraint Kalman Filtering

open access: yesSensors, 2017
The foot-mounted inertial navigation system is an important method of pedestrian navigation as it, in principle, does not rely any external assistance. A real-time range decomposition constraint method is proposed in this paper to combine the information
Wei Shi, Yang Wang, Yuanxin Wu
doaj   +1 more source

The impact of location on satisfaction with dementia services amongst people with dementia and their informal carers: a comparative evaluation of a community-based and a clinic-based memory service [PDF]

open access: yes, 2007
Background: The development of effective medication for the treatment of Alzheimer's disease led to an expansion in the use of memory clinics ther clinic-based services for the delivery and monitoring of the drugs.
Gibson, Grant   +3 more
core   +1 more source

Multiradar Collaborative Task Scheduling Algorithm Based on Graph Neural Networks with Model Knowledge Embedding

open access: yesLeida xuebao
Modern radar systems face increasingly complex challenges in tasks such as detection, tracking, and identification. The diversity of task types, limited data resources, and strict execution time requirements make radar task scheduling a strongly NP-hard ...
Haoqing LI   +4 more
doaj   +1 more source

Downlink Ergodic Rate Analysis for Virtual Cell Based Cloud Radio Access Networks

open access: yesIEEE Access, 2017
Cloud Radio Access Network (CRAN) is a promising approach to cope with the challenges of next generation mobile communications. This paper studies the downlink ergodic rate of a (N, K) virtual cell-based CRAN, in which each mobile station (MS) selects ...
Ming Cheng   +3 more
doaj   +1 more source

A Location Privacy Attack Based on the Location Sharing Mechanism with Erroneous Distance in Geosocial Networks

open access: yesSensors, 2020
Geographical social networks (GSN) is an emerging research area. For example, Foursquare, Yelp, and WeChat are all well-known service providers in this field. These applications are also known as location-based services (LBS).
Tu-Liang Lin   +2 more
doaj   +1 more source

A 3-D Near-Field Source Localization Approach Based on the Combination of a Phase Interferometer, the Centroid Algorithm and the Perpendicular Foot Algorithm

open access: yesSensors
In this study, several 3-dimensional (3-D) parameter estimation and localization algorithms for wireless near-field (NF) sources are proposed employing the uniform circular array (UCA) structure. In the single-base-station case, the algebraic relation is
Zhijun Qin   +6 more
doaj   +1 more source

Providing Location-Aware Location Privacy Protection for Mobile Location-Based Services

open access: yesTsinghua Science and Technology, 2016
Location privacy has been a serious concern for mobile users who use location-based services provided by third-party providers via mobile networks. Recently, there have been tremendous efforts on developing new anonymity or obfuscation techniques to ...
Yu Wang, Dingbang Xu, Fan Li
doaj   +1 more source

A Survey of Dummy-Based Location Privacy Protection Techniques for Location-Based Services

open access: yesSensors, 2022
As smart devices and mobile positioning technologies improve, location-based services (LBS) have grown in popularity. The LBS environment provides considerable convenience to users, but it also poses a significant threat to their privacy.
Shiwen Zhang   +4 more
doaj   +1 more source

Noise-Resilient Acoustic Low Energy Beacon for Proximity-Based Indoor Positioning Systems

open access: yesSensors, 2021
Proximity-Based Indoor Positioning Systems (PIPSs) are a simple to install alternative in large facilities. Besides, these systems have a reduced computational cost on the mobile device of those users who do not continuously demand a high location ...
Teodoro Aguilera   +5 more
doaj   +1 more source

Location Determination Using WiFi - Fingerprinting Versus WiFi - Trilateration

open access: yes, 2007
Many applications in the area of location-based services and personal navigation require nowadays the location determination of a user not only in outdoor environment but also indoor.
Retscher, Günther, Mok, Esmond
core   +2 more sources

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