Results 41 to 50 of about 15,274 (262)

Low-Cost Indoor Positioning Application Based on Map Assistance and Mobile Phone Sensors

Sensors, 2018
Current mainstream navigation and positioning equipment, intended for providing accurate positioning signals, comprise global navigation satellite systems, maps, and geospatial databases.
Yi-Shan Li, Fang-Shii Ning
doaj   +1 more source

Operation Limits of Integrated Photo‐Rechargeable Batteries

Advanced Materials, EarlyView.
This study elucidates the operational limitations of integrated photo‐rechargeable batteries. We demonstrate that the photo‐charging process is fundamentally restricted not only by material‐to‐material energy level alignment but also by transient capacitive charge accumulation within the cathode framework.
Byung‐Man Kim, Arvind Pujari, Hooman Abbasi, Weidong Xu, Yutong Han, Samuel D. Stranks, Michael De Volder   +6 more
wiley   +1 more source

Doppler Differential Positioning Technology Using the BDS/GPS Indoor Array Pseudolite System

Sensors, 2019
A Global Satellite Navigation System (GNSS) cannot provide normal location services in an indoor environment because the signals are blocked by buildings.
Xingli Gan, Baoguo Yu, Lu Huang, Ruicai Jia, Heng Zhang, Chuanzhen Sheng, Guangwei Fan, Boyuan Wang   +7 more
doaj   +1 more source

Electrochromic Adaptive Solar Heater and Sub‐Ambient Passive Daytime Radiative Cooler

Advanced Materials, EarlyView.
An electrochromic Cu–Bi nanocluster device dynamically switches between solar heating and daytime sub‐ambient radiative cooling without mechanical motion. Defect‐activated graphene, minimized electrolyte loss, and pulse‐assisted reversible electrodeposition enable opposite solar and mid‐infrared modulation in one opaque platform, establishing a design ...
Chenxi Sui, Qizhang Li, Yu Han, Xinyu Dou, Gangbin Yan, Jiadong Liu, Blake Harris, Jinlei Li, Alexander S. Filatov, Qingsong Fan, Ching‐Tai Fu, Po‐Chun Hsu   +11 more
wiley   +1 more source

Study on Adversarial Sample Attacks on Deep Learning Based Fingerprinting Indoor Localization [PDF]

Jisuanji gongcheng
This study investigated adversarial attacks on Deep Learning(DL) based Wi-Fi fingerprint indoor positioning systems, which have significantly improved indoor localization performance by effectively extracting deep features from Received Signal Strength ...
ZHANG Xuejun, XI Ayou, JIA Xiaohong, ZHANG Bin, LI Mei, DU Xiaogang, HUANG Haiyan
doaj   +1 more source

Diketopyrrolopyrrole‐Based Cation as a Semiconducting Spacer in Layered Perovskite

Advanced Materials, EarlyView.
Diketopyrrolopyrrole cation incorporated layered perovskites exhibiting extended absorption profiles and enhanced charge carrier mobility with type‐II energy alignment. The improved photoconversion efficiency demonstrates the critical role of incorporating organic semiconductors in optimizing layered perovskite performance.
Waygen Thor, Colin Jeanguenat, Louise De Cian, Demetra Tsokkou, Parnian Ferdowsi, Nicolas J. Diercks, Natalie Banerji, Jun‐Ho Yum, Kevin Sivula   +8 more
wiley   +1 more source

Recent Advances of Slip Sensors for Smart Robotics

Advanced Materials Technologies, EarlyView.
This review summarizes recent progress in robotic slip sensors across mechanical, electrical, thermal, optical, magnetic, and acoustic mechanisms, offering a comprehensive reference for the selection of slip sensors in robotic applications. In addition, current challenges and emerging trends are identified to advance the development of robust, adaptive,
Xingyu Zhang, Liao Wu, Shuai He, Zhao Sha, Yuwan Huang, Shuying Wu, Dewei Chu, Chun H. Wang, Shuhua Peng   +8 more
wiley   +1 more source

An RFID Indoor Positioning Algorithm Based on Support Vector Regression

Sensors, 2018
Nowadays, location-based services, which include services to identify the location of a person or an object, have many uses in social life. Though traditional GPS positioning can provide high quality positioning services in outdoor environments, due to ...
He Xu, Manxing Wu, Peng Li, Feng Zhu, Ruchuan Wang   +4 more
doaj   +1 more source

Virtual Cultural Tour Guidance System Integrated with IBeacon-based Indoor Positioning [PDF]

Jisuanji gongcheng, 2016
The 3D virtual tour system often provides immersive tour experience.It cannot offer information service about tour and is hard to fulfill users’ personalized requirement.To tackle this issue,an indoor positioning method based on IBeacon Bluetooth ...
WU Xiaozhu,CHEN Chongcheng,LIU Xianfeng,LI Jieguang,FANG Lina
doaj   +1 more source

Spectral Compensation Strategy for Radical‐Induced Dye Degradation in Liquid Crystal Polymer Composites

Advanced Optical Materials, EarlyView.
A spectral compensation strategy is introduced to overcome radical‐induced degradation of dichroic dyes during UV photopolymerization. By incorporating a complementary photochromic liquid‐crystalline dye, broadband optical attenuation is preserved without disrupting photopolymerization, enabling high‐contrast and durable dye‐doped liquid crystal ...
Wei‐Hsien Wu, Li‐Min Chang, Yu‐Hsuan Peng, Hsiu‐Hui Chen, Chun‐Ta Wang   +4 more
wiley   +1 more source