Results 261 to 270 of about 4,227,251 (320)
Theories and Methods for Indoor Positioning Systems: A Comparative Analysis, Challenges, and Prospective Measures. [PDF]
Sensors (Basel)Hailu TG, Guo X, Si H, Li L, Zhang Y.
europepmc +1 more source
APPLICATION OF INDOOR POSITIONING BASED ON KPCA AND BP NEURAL NETWORK ALGORITHM
, 2017 Zou Zi-ming, Wenbin He, Fumin Li
openalex +1 more source
Deep Underground Science and Engineering, EarlyView.Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang +4 more
wiley +1 more source
Improved Kalman Filtering Algorithm Based on Levenberg-Marquart Algorithm in Ultra-Wideband Indoor Positioning. [PDF]
Sensors (Basel)Xie C, Fang X, Yang X.
europepmc +1 more source
Review and prospects of shear test of bolted rock joints
Deep Underground Science and Engineering, EarlyView.The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren +4 more
wiley +1 more source
Robust Indoor Positioning with Smartphone by Utilizing Encoded Chirp Acoustic Signal. [PDF]
Sensors (Basel)Cheng B, Huang Y, Zou C.
europepmc +1 more source
Deep Underground Science and Engineering, EarlyView.The effects of grout strength and thickness on the shear behavior of bolt–grout interfaces (BGI) under constant normal stiffness conditions are investigated. Shear strength, failure modes, and acoustic emission characteristics are examined. The findings reveal that grout strength exerts a significantly greater influence on BGI shear strength and ...
Sunhao Zhang +5 more
wiley +1 more source
A Survey of Visible-Light-Communication-Based Indoor Positioning Systems. [PDF]
Sensors (Basel)Wang R, Niu G, Cao Q, Chen CS, Ho SW.
europepmc +1 more source
Deep Underground Science and Engineering, EarlyView.This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu +6 more
wiley +1 more source