Junyang Liu¹, Yuan Li², Yulu Zhang², Shuai Ma², Gui Li³, Yi He¹, Haiwen Yi¹, Yue Liu¹, Xiaotao Xu⁴, Xu Zhang¹, Jinyao He¹, Guangjun Wen¹, Jian Li^1,*

CMC-Computers, Materials & Continua, Vol.80, No.1, pp. 913-930, 2024, DOI:10.32604/cmc.2024.049999 - 18 July 2024

Abstract Addressing the challenges of passive Radio Frequency Identification (RFID) indoor localization technology in Non-Line-of-Sight (NLoS) and multipath environments, this paper presents an innovative approach by introducing a combined technology integrating an improved Kalman Filter with Space Domain Phase Difference of Arrival (SD-PDOA) and Received Signal Strength Indicator (RSSI). This methodology utilizes the distinct channel characteristics in multipath and NLoS contexts to effectively filter out interference and accurately extract localization information, thereby facilitating high precision and stability in passive RFID localization. The efficacy of this approach is demonstrated through detailed simulations and empirical tests conducted on… More >

Lingwu Qian¹, Jianxiang Li², Qi Tang¹, Mengfei Liu¹, Bingjie Yuan¹, Guoli Ji^1,*

CMES-Computer Modeling in Engineering & Sciences, Vol.136, No.2, pp. 1441-1455, 2023, DOI:10.32604/cmes.2023.024534 - 06 February 2023

Abstract In recent years, a number of wireless indoor positioning (WIP), such as Bluetooth, Wi-Fi, and Ultra-Wideband (UWB) technologies, are emerging. However, the indoor environment is complex and changeable. Walls, pillars, and even pedestrians may block wireless signals and produce non-line-of-sight (NLOS) deviations, resulting in decreased positioning accuracy and the inability to provide people with real-time continuous indoor positioning. This work proposed a strong tracking particle filter based on the chi-square test (SPFC) for indoor positioning. SPFC can fuse indoor wireless signals and the information of the inertial sensing unit (IMU) in the smartphone and detect More >

Kristina K. Rauser‐Foltz¹, Lois J. Starr², Anji T. Yetman¹

Congenital Heart Disease, Vol.14, No.5, pp. 864-867, 2019, DOI:10.1111/chd.12824

Abstract Objectives: This study assessed the frequency and utility of echocardiographic examination in patients with all forms of Ehlers‐Danlos syndrome and sought to iden‐ tify clinical variables associated with an abnormal echocardiogram.
Design/setting: This was a retrospective study of all patients carrying a diagnosis of Ehlers‐Danlos syndrome of any type who were evaluated by a pediatrician or pediatric subspecialist at a single tertiary medical center with an affiliated children’s hospital during the period January 2013 to December 2018.
Patients: Chart review was performed on all patients carrying a diagnosis of Ehlers‐ Danlos syndrome in the electronic medical record.
Outcome Measures:… More >