Results 11 to 20 of about 2,152,800 (267)

3-D Spatial Spectrum Fusion Indoor Localization Algorithm Based on CSI-UCA Smoothing Technique

IEEE Access, 2018
In the indoor wireless localization environment, the non-line-of-sight receiving signal and low signal-to-noise ratio are usually strongly dominant issues due to the heavy existence of multipath signals, which also restrict the final wireless ...
Di He, Taha Bouras, Xin Chen, Wenxian Yu, Yi Zhang, Yueming Yang   +5 more
doaj   +1 more source

A State Optimization Model Based on Kalman Filtering and Robust Estimation Theory for Fusion of Multi-Source Information in Highly Non-linear Systems

Sensors, 2019
Consistent state estimation is a vital requirement in numerous real life applications from localization to multi-source information fusion. The Kalman filter and its variants have been successfully used for solving state estimation problems.
Muhammad Adeel Akram, Peilin Liu, Muhammad Owais Tahir, Waqas Ali, Yuze Wang   +4 more
doaj   +1 more source

Location- and Physical-Activity-Based Application for Japanese Vocabulary Acquisition for Non-Japanese Speakers

Multimodal Technologies and Interaction, 2023
There are various mobile applications to support foreign-language learning. While providing interactive designs and playful games to keep learners interested, these applications do not focus on motivating learners to continue learning after a long time ...
Nguyen Tran, Shogo Kajimura, Yu Shibuya
doaj   +1 more source

Vector Graph Assisted Pedestrian Dead Reckoning Using an Unconstrained Smartphone

Sensors, 2015
The paper presents a hybrid indoor positioning solution based on a pedestrian dead reckoning (PDR) approach using built-in sensors on a smartphone. To address the challenges of flexible and complex contexts of carrying a phone while walking, a robust ...
Jiuchao Qian, Ling Pei, Jiabin Ma, Rendong Ying, Peilin Liu   +4 more
doaj   +1 more source

Statistical Multipath Model Based on Experimental GNSS Data in Static Urban Canyon Environment

Sensors, 2018
A deep understanding of multipath characteristics is essential to design signal simulators and receivers in global navigation satellite system applications.
Yuze Wang, Xin Chen, Peilin Liu
doaj   +1 more source

Playful Learning with a Location-Based Digital Card Environment: A Promising Tool for Informal, Non-Formal, and Formal Learning

Information, 2020
Most people are using their smartphones daily and carry them all the time. Therefore, mobile learning applications can be integrated in daily routines to make learning a part of daily life.
Olga De Troyer, Jan Maushagen, Renny Lindberg, David Breckx   +3 more
doaj   +1 more source

Improvement of Noise Uncertainty and Signal-To-Noise Ratio Wall in Spectrum Sensing Based on Optimal Stochastic Resonance

Sensors, 2019
Noise uncertainty and signal-to-noise ratio (SNR) wall are two very serious problems in spectrum sensing of cognitive radio (CR) networks, which restrict the applications of some conventional spectrum sensing methods especially under low SNR ...
Di He, Xin Chen, Ling Pei, Lingge Jiang, Wenxian Yu   +4 more
doaj   +1 more source

A Comprehensive Survey for Deep-Learning-Based Abnormality Detection in Smart Grids with Multimodal Image Data

Applied Sciences, 2022
In this paper, we provide a comprehensive survey of the recent advances in abnormality detection in smart grids using multimodal image data, which include visible light, infrared, and optical satellite images.
Fangrong Zhou, Gang Wen, Yi Ma, Hao Geng, Ran Huang, Ling Pei, Wenxian Yu, Lei Chu, Robert Qiu   +8 more
doaj   +1 more source

Double Dummy Location Selection Algorithm Based on Behavior Correlation [PDF]

Jisuanji kexue, 2023
At present,most of the dummy location privacy protection methods do not fully consider that the attacker may have the background knowledge about the information,which user requested from the service last time,so it cannot effectively resist the ...
TU Sipan, ZHANG Lin, LIU Xiping
doaj   +1 more source

A Novel Nonlinear Stochastic-Resonance-Enhanced Acceleration Data Processing Approach [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Smartphones are indispensable tools in modern social life, and they can be used for online shopping, electronic payment, gaming, and navigation. In particular, low-cost inertial measurement unit (IMU) sensors are widely integrated into smartphones, so ...
X. Gao, D. He, X. Chen, Y. Xiang, D. Zou, L. Pei   +5 more
doaj   +1 more source