Lei Yu

ORCID: 0000-0003-4439-2133
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About
Contact & Profiles
Research Areas
  • Structural Health Monitoring Techniques
  • Indoor and Outdoor Localization Technologies
  • Ultrasonics and Acoustic Wave Propagation
  • Millimeter-Wave Propagation and Modeling
  • Energy Efficient Wireless Sensor Networks
  • Laser-induced spectroscopy and plasma
  • Advanced Adaptive Filtering Techniques
  • Speech and Audio Processing
  • Structural Engineering and Vibration Analysis
  • Radio Wave Propagation Studies
  • Advanced Fiber Optic Sensors
  • Acoustic Wave Phenomena Research
  • Satellite Communication Systems
  • Underwater Vehicles and Communication Systems
  • Industrial Technology and Control Systems
  • Concrete and Cement Materials Research
  • Acoustic Wave Resonator Technologies
  • Laser-Plasma Interactions and Diagnostics
  • Control Systems and Identification
  • Magnetic confinement fusion research
  • Innovative concrete reinforcement materials
  • Atomic and Molecular Physics
  • Vehicle Noise and Vibration Control
  • Optical Wireless Communication Technologies
  • Ultrasound Imaging and Elastography

Beijing Institute of Technology
2013-2025

Peking University
2025

Shenzhen University
2025

China University of Geosciences
2023

Xi'an University of Technology
2010-2020

Xi'an University of Science and Technology
2014

Institute of Modern Physics
2012

Concrete made from rice husk ash (RHA) is stronger and more durable than normal concrete. It can also help reduce greenhouse gas emissions. A feasible prediction model to rapidly determine the compressive strength of RHA concrete save resources time, properties characteristics be accurately determined. In this study, predicted by using support vector regression (SVR) in conjunction with three optimization algorithms, namely firefly algorithm (FA), particle swarm (PSO), grey wolf (GWO). The...

10.1016/j.cscm.2023.e02201 article EN cc-by-nc-nd Case Studies in Construction Materials 2023-06-07

Abstract Piezocomposite ultrasonic transducers (PUTs) are extensively used in diverse technological fields, however, PUTs based on conventional 1–3 piezocomposite containing only one type of piezo pillars have met a bottleneck further performance enhancement. Herein, the [011]‐oriented relaxor ferroelectric Pb(In 1/3 Nb 2/3 )O 3 ‐Pb(Mg ‐PbTiO (PIN‐PMN‐PT) crystal, novel (1 A ,1 B )‐3 structure two types single‐crystal pillars‐ high d 33 , k t with square cross‐section (termed as 1 ) and dhgh...

10.1002/adfm.202417084 article EN Advanced Functional Materials 2025-01-05

Crowd counting is of significant importance for numerous applications, e.g., urban security, intelligent surveillance and crowd management. Existing methods typically require specialized hardware deployment strict operating conditions, thereby hindering their widespread application. To acquire a more effective approach, device-free method based on Channel Status Information (CSI) proposed. The wavelet domain denoising introduced to mitigate environment noise. Furthermore, the amplitude or...

10.3390/s18113981 article EN cc-by Sensors 2018-11-15

Modal parameter estimation plays an important role in vibration-based damage detection and is worth more attention investigation, as changes modal parameters are usually being used indicators. This paper focuses on the problem of output-only recursive time-varying structures based upon parameterized representations time-dependent autoregressive moving average (TARMA). A kernel ridge regression functional series TARMA (FS-TARMA) identification scheme proposed subsequently employed for a...

10.1155/2017/8176593 article EN cc-by Shock and Vibration 2017-01-01

Partially ionized plasma contains the bound electrons, which have an effect on instability of plasma. The evolution process electron density cannot be obtained by using existing optical method used for diagnosing free density. In this work, we carry out a high-precision experiment: energy loss 100 keV proton beam penetrating through partially hydrogen target is measured platform ion beam-plasma interaction at Institute Modern Physics, Chinese Academy Sciences. according to model Bethe...

10.7498/aps.73.20231736 article EN Acta Physica Sinica 2024-01-01

Abstract The modal parameters of long-range cruise weapon systems are typically obtained through finite element analysis and ground vibration testing. However, due to the inability simulate system’s time-varying characteristics under flight conditions, it is customary conduct modelling or testing based on several representative operating scenarios. Subsequently, frequency system derived numerical interpolation. This repetitive modelling, analysis, process both time-consuming...

10.1088/1742-6596/2891/16/162022 article EN Journal of Physics Conference Series 2024-12-01

Crowd counting is of significant importance for numerous applications, e.g., urban security, intelligent surveillance and crowd management. Existing methods typically require specialized hardware deployment strict operating conditions, thereby hindering their widespread deployment. To acquire a more effective approach, device-free method based on Channel Status Information (CSI) proposed, which could mitigate environment noise through wavelet transform extract the amplitude or phase...

10.20944/preprints201808.0015.v1 preprint EN 2018-08-01

Natural gas has been one of the most important kinds vehicle fuel since discovery abundant shale storage. Operating costs diesel engine can be reduced by replacing with diesel-CNG dual fuel. The present contribution is mainly about electronic control system engine. Hardware and software were designed. Two strategies named equivalent power strategy diesel-saving put forward for different targets. Furthermore, these two testified experiments conducted on test bench. Results show that average...

10.4028/www.scientific.net/amr.860-863.1754 article EN Advanced materials research 2013-12-13

Indoor localization systems based on received signal strength indication (RSSI) techniques are usually used in office buildings. However, RSSI is susceptible to environmental influences, which may make performances unstable. Packet recep

10.3233/rft-140059 article EN International Journal of RF Technologies 2014-01-01

X-ray emission induced by 300 MeV/u C ions impacting on copper was investigated at the Heavy Ion Research Facility in Lanzhou (HIRFL). The results showed a very high yield of K hyper-satellite comparing to satellite emission.

10.1088/1742-6596/388/8/082031 article EN Journal of Physics Conference Series 2012-11-05

The widespread popularization of ubiquitous devices promotes fervent demands for location-based services (LBS). This paper technically proposes a methodology named virtual reference based positioning (VRBP) the location positioning, which models RFID systems with tags and constructs such information classical radio propagation model in order to enhance accuracy. Instead deploying high density tags, notion VRBP decreases possibility signal interference. Furthermore, we propose VT-LANDMARC,...

10.1145/1774088.1774206 article EN 2010-03-22

Operational modal parameter identification is a tough problem in aerospace engineering due to the complex mechanics environment, various noises, and limited computational resources. In this paper, novel, recursive, robust, high-efficiency approach proposed for issue. The kernelized time-dependent autoregressive moving average (TARMA) model adopted nonstationary responses, recursive estimator established based on maximum correntropy criterion, sliding-window technique applied fix complexity,...

10.1155/2020/2946709 article EN cc-by Shock and Vibration 2020-06-05
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