Bilong Liu
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View article: Analysis of Key Factors Affecting the Sensitivity of Dual-Backplate Capacitive MEMS Microphones
Analysis of Key Factors Affecting the Sensitivity of Dual-Backplate Capacitive MEMS Microphones Open
This paper presents a comprehensive investigation of sensitivity-determining factors in dual-backplate capacitive MEMS microphones through analytical modeling, finite element analysis (FEM), and experimental validation. The study focuses o…
View article: Volume measurement and calculation of sessile droplets on inclined planes and spherical external surfaces
Volume measurement and calculation of sessile droplets on inclined planes and spherical external surfaces Open
This paper puts forward a novel measurement and calculation method for sessile droplets' volumes on inclined planes and spherical external surfaces. The volume of a droplet on an inclined plane or on a spherical external surface, which has…
View article: Model prediction and numerical calculation of critical breakage volumes of pendant droplets
Model prediction and numerical calculation of critical breakage volumes of pendant droplets Open
There is an inherent link between droplet volume (V) and the diameter of the dropper influencing its creation. This research study calculates the fundamental profile of a pendant droplet created by a dropper. We confirm that the internal f…
View article: Study on the Accurate Magnetic Field Analytical Model of an Inertial Magnetic Levitation Actuator Considering End Effects
Study on the Accurate Magnetic Field Analytical Model of an Inertial Magnetic Levitation Actuator Considering End Effects Open
To address the demand for low noise and high stealthiness in ships and other vessels, this paper innovatively proposes an inertial magnetic levitation actuator based on non-uniform-sized Halbach permanent magnet arrays. To improve control …
View article: Minimal Conditioned Stiffness Matrices with Frequency-Dependent Path Following for Arbitrary Elastic Layers over Half-Spaces
Minimal Conditioned Stiffness Matrices with Frequency-Dependent Path Following for Arbitrary Elastic Layers over Half-Spaces Open
This paper introduces an efficient computational procedure for analyzing the propagation of harmonic waves in layered elastic media. This offers several advantages, including the ability to handle arbitrary frequencies, depths, and the num…
View article: Numerical Investigation of Heat Transfer and Development in Spherical Condensation Droplets
Numerical Investigation of Heat Transfer and Development in Spherical Condensation Droplets Open
This study establishes thermodynamic assumptions regarding the growth of condensation droplets and a mathematical formulation of droplet energy functionals. A model of the gas–liquid interface condensation rate based on kinetic theory is d…
View article: Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys
Coupling Effect of Mn Addition and Deformation on Mechanical and Electrical Properties of Al-Zr Alloys Open
In order to increase the strength of Al-Zr alloys, which are promisingly used for heat-resistant conductors, the coupling effect of Mn addition (0.16 wt.% and 0.88 wt.%) and deformation on the precipitation, mechanical, and electrical prop…
View article: Sound Absorption of the Absorber Composed of a Shunt Loudspeaker and Porous Materials in Tandem
Sound Absorption of the Absorber Composed of a Shunt Loudspeaker and Porous Materials in Tandem Open
To investigate the sound absorption of the absorber composed of a shunt loudspeaker (SL) and porous materials (PM) in tandem, the normal absorption coefficients for six samples of different groups of parameters are measured using impedance…
View article: Prediction Method for RUL of Underwater Self-Enhancement Structure: Subsea Christmas Tree High-Pressure Valve Actuator as a Case Study
Prediction Method for RUL of Underwater Self-Enhancement Structure: Subsea Christmas Tree High-Pressure Valve Actuator as a Case Study Open
Underwater pressure-bearing structures are produced in practice by means of pressure self-enhancement methods in order to improve the stress distribution and enhance the pressure-bearing performance. On the other hand, the pairs equation s…
View article: Numerical Investigation of Distributed Speed Feedback Control of Turbulent Boundary Layer Excitation Curved Plates Radiation Noise
Numerical Investigation of Distributed Speed Feedback Control of Turbulent Boundary Layer Excitation Curved Plates Radiation Noise Open
The control of decentralized velocity feedback on curved aircraft plates under turbulent boundary layer excitations is numerically investigated in this paper. Sixteen active control units are set on the plate to reduce the vibration and so…
View article: Determination of Frequency-Dependent Shear Modulus of Viscoelastic Layer via a Constrained Sandwich Beam
Determination of Frequency-Dependent Shear Modulus of Viscoelastic Layer via a Constrained Sandwich Beam Open
Viscoelastic material can significantly reduce the vibration energy and radiated noise of a structure, so it is widely used in lightweight sandwich structures. The accurate and efficient determination of the frequency-dependent complex mod…
View article: Arterial Coordination Control Optimization Based on AM–BAND–PBAND Model
Arterial Coordination Control Optimization Based on AM–BAND–PBAND Model Open
The green wave coordinated control model has evolved from the basic bandwidth maximization model to the multiweight approach to an asymmetrical multiband model and a general signal progression model with phase optimization to improve the o…
View article: Experimental Research on Reducing Flow-Induced Cavity Resonance with a Narrowband Active Noise Control System
Experimental Research on Reducing Flow-Induced Cavity Resonance with a Narrowband Active Noise Control System Open
In this paper, active control of flow-induced cavity resonance noise is addressed. A hybrid numerical method is presented to predict the resonance frequency and, instead of traditional active flow control, a narrowband active noise control…
View article: Fractional Order PID Control Based on Ball Screw Energy Regenerative Active Suspension
Fractional Order PID Control Based on Ball Screw Energy Regenerative Active Suspension Open
A ball screw type energy regenerative active suspension under fractional order PID control is proposed and studied in order to improve the vibration damping performance of the suspension. A mathematical model of the energy regenerative act…
View article: Multi-Sensor Fusion for Lateral Vehicle Localization in Tunnels
Multi-Sensor Fusion for Lateral Vehicle Localization in Tunnels Open
The satellite navigation signal in the tunnel is weak, and it is difficult to achieve accurate lateral positioning in complex conditions such as low-speed congestion by relying solely on inertial navigation or line image recognition, which…
View article: Spatio-Temporal Traffic Flow Prediction Based on Coordinated Attention
Spatio-Temporal Traffic Flow Prediction Based on Coordinated Attention Open
Traffic flow prediction can provide effective support for traffic management and control and plays an important role in the traffic system. Traffic flow has strong spatio-temporal characteristics, and existing traffic flow prediction model…
View article: Audio Compensation with Cascade Biquad Filters for Feedback Active Noise Control Headphones
Audio Compensation with Cascade Biquad Filters for Feedback Active Noise Control Headphones Open
In active noise control (ANC) headphones, the audio signal is modified together with the primary noise if a feedback controller is used. Although this problem can be alleviated with an FIR model of the secondary path, practical implementat…
View article: Narrowband Active Noise Control Using Decimated Controller for Disturbance with Close Frequencies
Narrowband Active Noise Control Using Decimated Controller for Disturbance with Close Frequencies Open
In this paper, multi-channel active noise control systems subjected to narrowband disturbances with close frequencies are investigated. Instead of controlling each frequency separately, a mixed-reference signal is assumed and thus a transv…
View article: Topological waveguide states with adjustable width in elastic heterostructures with periodic semi-circular holes
Topological waveguide states with adjustable width in elastic heterostructures with periodic semi-circular holes Open
The topological interface state in the one-dimensional periodic structure is difficult to be flexibly applied to practical engineering. Here we construct a ubiquitous sandwich structure with periodic semi-circular holes to realize the topo…
View article: Feedback Controller Optimization for Active Noise Control Headphones Considering Frequency Response Mismatch between Microphone and Human Ear
Feedback Controller Optimization for Active Noise Control Headphones Considering Frequency Response Mismatch between Microphone and Human Ear Open
This paper presents an investigation on the feedback controller design for active noise control headphones under the condition that the frequency responses of the primary and secondary paths corresponding to the feedback microphone do not …
View article: Enhanced Low-Frequency Sound Absorption of a Porous Layer Mosaicked with Perforated Resonator
Enhanced Low-Frequency Sound Absorption of a Porous Layer Mosaicked with Perforated Resonator Open
A composite structure composed of a porous-material layer mosaicked with a perforated resonator is proposed to improve the low-frequency sound absorption of the porous layer. This structure is investigated in the form of a porous-material …
View article: Synthetic Weyl Points of the Shear Horizontal Guided Waves in One-Dimensional Phononic Crystal Plates
Synthetic Weyl Points of the Shear Horizontal Guided Waves in One-Dimensional Phononic Crystal Plates Open
Weyl physics in acoustic and elastic systems has drawn extensive attention. In this paper, Weyl points of shear horizontal guided waves are realized by one-dimensional phononic crystal plates, in which one physical dimension plus two geome…
View article: Design of a Maglev Inertial Actuator with High Mass Power Ratio for Lateral Vibration Control of Propulsion Shafting
Design of a Maglev Inertial Actuator with High Mass Power Ratio for Lateral Vibration Control of Propulsion Shafting Open
The maglev inertial actuators with high power and mass maybe effective for lateral vibration control of a propulsion shafting. But the mass power ratio of the actuators currently in use is too small to meet the requirements. In the paper, …
View article: Optimal Design of Magneto-Force-Thermal Parameters for Electromagnetic Actuators with Halbach Array
Optimal Design of Magneto-Force-Thermal Parameters for Electromagnetic Actuators with Halbach Array Open
A magnetic levitation isolation system applied for the active control of micro-vibration in space requires actuators with high accuracy, linear thrust and low power consumption. The magneto-force-thermal characteristics of traditional elec…
View article: A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption
A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption Open
A perforated plate with stepwise apertures (PPSA) is proposed to improve sound absorption for low frequencies. In contrast with an ordinary perforated plate with insufficient acoustic resistance and small acoustic mass, the perforated plat…
View article: Optimization of Shunted Loudspeaker for Sound Absorption by Fully Exhaustive and Backtracking Algorithm
Optimization of Shunted Loudspeaker for Sound Absorption by Fully Exhaustive and Backtracking Algorithm Open
The shunted loudspeaker with a negative impedance converter is a physical system with multiple influencing parameters. In this paper, a fully exhaustive backtracking algorithm was used to optimize these parameters, such as moving mass, tot…
View article: A note on the sound transmission of a spherical sound wave through a double plate structure
A note on the sound transmission of a spherical sound wave through a double plate structure Open
The sound transmission of a spherical wave through a double plate structure is theoretically and numerically analyzed. Unlike the plane wave incidence, it is demonstrated that the sound transmission loss due to the spherical sound wave inc…
View article: Sound Transmission Prediction of Sandwich Plates With Honeycomb and Foam Cores and an Emphatic Discussion on Radiation Terms
Sound Transmission Prediction of Sandwich Plates With Honeycomb and Foam Cores and an Emphatic Discussion on Radiation Terms Open
When applying the modal summation method to the sound transmission loss (STL) prediction of various plates, the assumption of the blocked sound pressure, or alternatively speaking, ignoring sound radiation terms, has obvious simplicity and…
View article: An Investigation on the Sound Absorption Performance of Granular Molecular Sieves under Room Temperature and Pressure
An Investigation on the Sound Absorption Performance of Granular Molecular Sieves under Room Temperature and Pressure Open
The sound absorption of granular silica-aluminate molecular sieve pellets was investigated in this paper. The absorption coefficients of molecular sieve pellets with different pore sizes, pellet sizes, and layer thicknesses were measured t…