A5102806513- Machine Fault Diagnosis Techniques
- Gear and Bearing Dynamics Analysis
- Advanced machining processes and optimization
- Fault Detection and Control Systems
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Measurement and Metrology Techniques
- Mechanical and Optical Resonators
- Asphalt Pavement Performance Evaluation
- Acoustic Wave Resonator Technologies
- Infrastructure Maintenance and Monitoring
- Enhanced Oil Recovery Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Advanced Measurement and Detection Methods
- Advanced Fiber Laser Technologies
- Industrial Vision Systems and Defect Detection
- Structural Behavior of Reinforced Concrete
- Structural Health Monitoring Techniques
- Advancements in Battery Materials
- Advanced Wireless Communication Technologies
- Sensor Technology and Measurement Systems
- Reliability and Maintenance Optimization
- Cerebral Palsy and Movement Disorders
- Advanced Neural Network Applications
- Optical Wireless Communication Technologies
North University of China
2022-2025
Anhui University of Science and Technology
2018-2024
Xinjiang Medical University
2023-2024
Second Affiliated Hospital of Xinjiang Medical University
2023-2024
Jiangsu University
2024
Xi'an Jiaotong University
2012-2023
Jiangxi Provincial Cancer Hospital
2023
Nanchang University
2023
Civil Aviation University of China
2023
Ministry of Education of the People's Republic of China
2023
Abstract Acoustic sensors with ultrahigh sensitivity, broadband response, and high resolution are essential for high-precision nondestructive weak signal detection technology. In this paper, based on the size effect of an ultrahigh-quality ( Q ) calcium fluoride (CaF 2 resonator, a acoustic is detected by dispersive response regime in which acoustic, elastic wave modulates geometry converted to resonance frequency shift. Through structural design sensitivity reaches 11.54 V/Pa at 10 kHz...
Chirp modulation can generate a relatively flat electro-optic frequency comb (EO comb) and offers the advantage of reconfigurability, demonstrating significant potential in high-precision sensing absorption spectroscopy measurements. However, nonresonant devices such as waveguides are susceptible to limitations efficiency bandwidth during modulation. In this paper, by utilizing chirp resonance mode, we have realized an EO based on lithium niobate resonator with small tooth spacing high...
The optical resonators with ultrahigh quality (Q) factor are advantageous as highly sensitive sensors, benefiting from the sharp characteristics of their resonance peaks. However, this high sensitivity is usually achieved at expense linear range, so sensing dynamic range physically limited. In paper, we propose a nonlinear modulation method based on generation an interference phenomenon between two scattering amplitudes. recursive property Bessel function utilized to construct expressions...
We propose a low-frequency magnetic sensing method using magnetically modulated microcavity resonant mode. Our sensitive unit with periodically changing poles is formed by combining an AC excitation coil microcavity. The vibrates at the frequency of amplitude-modulated signal and changes its mode when interacts field. Signal processing performed on spectrum to obtain signals. results experiment show that measured sensitivity 0.5 Hz field 12.49 V/mT, bias instability noise 16.71 nT achieved....
As a natural modifier of asphalt, rock asphalt has been widely used to improve its thermal stability and aging resistance. However, the cracking resistance modified by is unsatisfactory. In order in low temperature, two kinds modifiers—styrene–butadiene rubber (SBR) nano-CaCO3—were selected as compound modifiers, then implemented low-temperature performance binder. Then, Buton (BRA) was chosen study subject. The BRA, compound-modified BRA/SBR, BRA nano-CaCO3 were determined identify whether...
The methods for synergistically improving mechanical performance and self-healing ability of polymers based on hydrogen bonds were introduced discussed.
The vibration signals collected by the sensor often have non-stationary and non-linear characteristics owing to complexity of working environment rolling bearing, so it is difficult obtain useful stable information for diagnosis. Empirical Wavelet Transform (EWT) can effectively decompose nonlinear signals, but not suitable signal analysis bearing with a complicated spectrum. In this paper, an improved EWT (IEWT) method proposed developing new segmentation approach. Meanwhile, IEWT compared...
Abstract We present a novel approach for flow simulations through naturally-fractured vuggy carbonate reservoirs. This generalizes upscaling methods which have been successfully used to perform reservoir on geological (fine) scales. Typically, vugular porous media is described using both Stokes and Darcy's equations at the fine-scale. propose use of simplified model based Stokes-Brinkman equations. Darcy can be obtained from these by appropriate choice parameters. Moreover, in presence...
Cooperative non-orthogonal multiple access (C-NOMA) and buffering are promising techniques to improve spectrum efficiency in the next generation of wireless networks. In this article, a buffer-aided cooperative NOMA network with direct links is studied. The throughput maximization problem firstly formulated under assumption fixed power allocation optimally solved by designing mode selection policy. order further system throughput, extended into case that jointly optimized. An optimal...
For decades, bearing factory quality evaluation has been a key problem and the methods used are always static tests. This paper investigates use of piezoelectric ultrasonic transducers (PUT) as dynamic diagnostic tools relevant signal classification technique, wavelet packet entropy (WPEntropy) flow manifold learning, for quality. The data were analyzed using learning. results showed that technique with WPEntropy learning was able to detect different types defects on components. test method...
Whispering gallery mode (WGM) crystalline resonator is an excellent platform for acoustic sensing because the quality ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</i> ) factor of 10 <sup xmlns:xlink="http://www.w3.org/1999/xlink">11</sup> can theoretically increase sensitivity by more than three orders magnitude. However, ultrahigh and wide dynamic response range cannot be achieved simultaneously, due to extremely narrow linewidth...
A series of off-stoichiometric LiNixMn2–xO4 (x = 0.37, 0.43, 0.49, 0.52, and 0.56) spinels are prepared by adjusting Mn/Ni molar ratio used to investigate the correlations between Mn3+ content, structural ordering degree, oxygen vacancies, impurities, electrochemical properties in these through inductive coupled plasma atomic emission spectroscopy, scanning electron microscopy, Fourier transform infrared X-ray photoelectron Rietveld refinement diffraction data, galvanostatic charge/discharge...
A novel non-contact instantaneous torque sensor is proposed in this paper. The mechanical structure of the mainly consists two eccentric sleeves rotating about an elastic shaft. measurement transformed into phase difference between sleeves. Eddy current sensors are used to measure distance changes their probes and modulated by when any applied shaft demodulation principle relies on solving simple trigonometric functions without complex signal processing methods. Therefore, acquisition can be...
We investigate physical layer security of a downlink cooperative non-orthogonal multiple access system with an untrusted relay. A friendly jammer (FJ) is employed in order to improve the secrecy sum rate. Aiming at maximizing rate by optimizing power allocation both source and FJ, optimization problem formulated solved iteratively using alternating method. Specifically, decoupled into two sub-problems, each which optimally solved. Moreover, proposed imperfect channel state information...