Search Results - "Cao, Hongji"

Protective Performance of Coated Reinforcement in Coral Concrete under Dry/Wet Cycling by Cao, Hongji, Wu, Qing, Akbar, Muhammad, Yang, Ning, Hussain, Zahoor

“…The actual protective performance of the coated reinforcement in coral concrete was investigated by measuring the chloride ion diffusion coefficient,…”
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An Adaptive Bluetooth/Wi-Fi Fingerprint Positioning Method based on Gaussian Process Regression and Relative Distance by Cao, Hongji, Wang, Yunjia, Bi, Jingxue, Qi, Hongxia

“…Trusted positioning data are very important for the fusion of Bluetooth fingerprint positioning (BFP) and Wi-Fi fingerprint positioning (WFP). This paper…”
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Indoor Positioning Integrating PDR/Geomagnetic Positioning Based on the Genetic-Particle Filter by Sun, Meng, Wang, Yunjia, Xu, Shenglei, Cao, Hongji, Si, Minghao

“…This paper proposes a fusion indoor positioning method that integrates the pedestrian dead-reckoning (PDR) and geomagnetic positioning by using the…”
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An Adaptive Weighted KNN Positioning Method Based on Omnidirectional Fingerprint Database and Twice Affinity Propagation Clustering by Bi, Jingxue, Wang, Yunjia, Li, Xin, Qi, Hongxia, Cao, Hongji, Xu, Shenglei

“…The human body has a great influence on Wi-Fi signal power. A fixed K value leads to localization errors for the K-nearest neighbor (KNN) algorithm. To address…”
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A Wi-Fi FTM-Based Indoor Positioning Method with LOS/NLOS Identification by Si, Minghao, Wang, Yunjia, Xu, Shenglei, Sun, Meng, Cao, Hongji

“…In recent years, many new technologies have been used in indoor positioning. In 2016, IEEE 802.11-2016 created a Wi-Fi fine timing measurement (FTM) protocol,…”
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Indoor Positioning Method Using WiFi RTT Based on LOS Identification and Range Calibration by Cao, Hongji, Wang, Yunjia, Bi, Jingxue, Xu, Shenglei, Si, Minghao, Qi, Hongxia

“…WiFi-based indoor positioning methods have attracted extensive attention due to the wide installation of WiFi access points (APs). Recently, the WiFi standard…”
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DBSCAN and TD Integrated Wi-Fi Positioning Algorithm by Bi, Jingxue, Cao, Hongji, Wang, Yunjia, Zheng, Guoqiang, Liu, Keqiang, Cheng, Na, Zhao, Meiqi

“…A density-based spatial clustering of applications with noise (DBSCAN) and three distances (TD) integrated Wi-Fi positioning algorithm was proposed, aiming to…”
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Supplementary open dataset for WiFi indoor localization based on received signal strength by Bi, Jingxue, Wang, Yunjia, Yu, Baoguo, Cao, Hongji, Shi, Tongguang, Huang, Lu

“…Several Wireless Fidelity (WiFi) fingerprint datasets based on Received Signal Strength (RSS) have been shared for indoor localization. However, they can’t…”
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RTK/Pseudolite/LAHDE/IMU-PDR Integrated Pedestrian Navigation System for Urban and Indoor Environments by Zhu, Ruihui, Wang, Yunjia, Cao, Hongji, Yu, Baoguo, Gan, Xingli, Huang, Lu, Zhang, Heng, Li, Shuang, Jia, Haonan, Chen, JianQiang

“…This paper presents an evaluation of real-time kinematic (RTK)/Pseudolite/landmarks assistance heuristic drift elimination (LAHDE)/inertial measurement…”
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Improved Indoor Fingerprinting Localization Method Using Clustering Algorithm and Dynamic Compensation by Bi, Jingxue, Huang, Lu, Cao, Hongji, Yao, Guobiao, Sang, Wengang, Zhen, Jie, Liu, Yuying

“…Many indoor fingerprinting localization methods are based on signal-domain distances with large localization error and low stability. An improved…”
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A Real-Time BLE/PDR Integrated System by Using an Improved Robust Filter for Indoor Position by Xu, Shenglei, Wang, Yunjia, Sun, Meng, Si, Minghao, Cao, Hongji

“…Indoor position technologies have attracted the attention of many researchers. To provide a real-time indoor position system with high precision and stability…”
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Research on HAR-Based Floor Positioning by Qi, Hongxia, Wang, Yunjia, Bi, Jingxue, Cao, Hongji, Xu, Shenglei

“…Floor positioning is an important aspect of indoor positioning technology, which is closely related to location-based services (LBSs). Currently, floor…”
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WiFi RTT Indoor Positioning Method Based on Gaussian Process Regression for Harsh Environments by Cao, Hongji, Wang, Yunjia, Bi, Jingxue, Xu, Shenglei, Qi, Hongxia, Si, Minghao, Yao, Guobiao

“…A novel two-way ranging approach was introduced into the Wireless Fidelity (WiFi) standard, and its ranging accuracy reached one meter in a low multipath…”
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BLE-based floor positioning method for multi-level atrium spatial environments by Qi, Hongxia, Wang, Yunjia, Bi, Jingxue, Cao, Hongji, Xu, Shenglei, Liu, Hui

“…Nowadays, cities and towns all over the world are dotted with high-rise buildings, and floor positioning technology has gradually become the focus of indoor…”
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Fingerprint Positioning Method for Dual-Band Wi-Fi Based on Gaussian Process Regression and K-Nearest Neighbor by Cao, Hongji, Wang, Yunjia, Bi, Jingxue, Sun, Meng, Qi, Hongxia, Xu, Shenglei

“…Since many Wi-Fi routers can currently transmit two-band signals, we aimed to study dual-band Wi-Fi to achieve better positioning results. Thus, this paper…”
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PSOSVRPos: WiFi indoor positioning using SVR optimized by PSO by Bi, Jingxue, Zhao, Meiqi, Yao, Guobiao, Cao, Hongji, Feng, Yougui, Jiang, Hu, Chai, Dashuai

“…Wireless fidelity (WiFi) indoor positioning has attracted the attention of thousands of researchers. It faces many challenges, and the primary problem is the…”
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Smartphones: 3D Indoor Localization Using Wi-Fi RTT by Cao, Hongji, Wang, Yunjia, Bi, Jingxue

“…This letter proposes a 3D indoor localization algorithm for smartphones using wireless fidelity (WiFi) round-trip time (RTT). In the proposed algorithm, the…”
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Robust Heading Estimation Algorithm for Android Smartphones by Cao, Hongji, Wang, Yunjia, Bi, Jingxue, Qi, Hongxia, Sun, Meng

“…This paper proposes a robust heading estimation algorithm for smartphones, which integrates the gradient descent (GD) approach and genetic algorithm (GA) to…”
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LOS compensation and trusted NLOS recognition assisted WiFi RTT indoor positioning algorithm by Cao, Hongji, Wang, Yunjia, Bi, Jingxue, Zhang, Yinsong, Yao, Guobiao, Feng, Yougui, Si, Minghao

“…In previous studies, ranging errors in the line of sight (LOS) environment were often overlooked, resulting in an increase in positioning errors. In non-line…”
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Simultaneous WiFi Ranging Compensation and Localization for Indoor NLoS Environments by Sun, Meng, Wang, Yunjia, Huang, Lu, Xu, Shenglei, Cao, Hongji, Joseph, Wout, Plets, David

“…Smartphone-based WiFi ranging using fine time measurement (FTM) is severely impacted by Non-line-of-sight (NLoS) environments, which causes significant…”
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