A5007749895- Acoustic Wave Phenomena Research
- Vehicle Noise and Vibration Control
- Aerodynamics and Acoustics in Jet Flows
- Wind and Air Flow Studies
- Machine Fault Diagnosis Techniques
- Plasmonic and Surface Plasmon Research
- Structural Health Monitoring Techniques
- Metamaterials and Metasurfaces Applications
- Turbomachinery Performance and Optimization
- Blind Source Separation Techniques
- Combustion and flame dynamics
- Offshore Engineering and Technologies
- Innovative Educational Techniques
- Remote Sensing and LiDAR Applications
- Petroleum Processing and Analysis
- Aerospace Engineering and Applications
- Magnetic Bearings and Levitation Dynamics
- Mesoporous Materials and Catalysis
- AI and Multimedia in Education
- Innovative Teaching Methods
- Indoor and Outdoor Localization Technologies
- Spectroscopy and Laser Applications
- Advanced Electron Microscopy Techniques and Applications
- Millimeter-Wave Propagation and Modeling
- Photonic and Optical Devices
Xi'an Jiaotong University
2021-2024
Dalian University of Technology
2006-2024
Yan'an University
2021-2022
Yanan University Affiliated Hospital
2021-2022
University of South Australia
2016
Lawrence Berkeley National Laboratory
2013
Abstract A boundary recovery and sliver elimination algorithm of the three‐dimensional constrained Delaunay triangulation is proposed for finite element mesh generation. The includes two main procedures: geometrical procedure topological procedure. Combining advantages edges/faces swappings splittings presented respectively by George Weatherill, can recover missing boundaries guarantee geometry conformity introducing fewer Steiner points. phases: ‘dressing wound’ smoothing, which will...
Abstract Noise source identification of gas turbines can provide the basis and guidance for vibration noise reduction turbines. Independent component analysis (ICA) is one most popular techniques blind separation (BSS) widely used in mechanical systems. ICA suitable independent signals. However, order to identify dependent sources turbines, a convolutive BSS frequency domain based on bounded (BCA) proposed. First, basic theory BCA introduced detail. The mixing time transformed into an...
A ring-shaped plasmonic nanostructure is established for realizing the field enhancement and focusing through a radial vector beam incidence. The light of proposed simulated by finite-difference time-domain (FDTD). results show that obvious spot can be observed when Au placed on gold layer. Especially, maximum intensity ratio single reach up to 41, minimum full width at half (FWHM) closes 60 nm, size beyond diffraction limit as small 0.19λ0. Moreover, not realized in cases linear...
For the sound field reconstruction of large conical surfaces, current statistical optimal near-field acoustic holography (SONAH) methods have relatively poor applicability and low accuracy. To overcome this problem, SONAH based on cylindrical is proposed in paper. Firstly, elementary waves are transformed into those suitable for radiated surface through cylinder-cone coordinates transformation, which forms matrix characteristic spatial domain. Secondly, pressure expressed as superposition...
Abstract For the sound field reconstruction of large cylindrical surfaces, statistically optimal near-field acoustic holography (SOCNAH) has high accuracy but low resolution. To solve this problem, resolution enhanced SOCNAH (RE-SOCNAH) based on equivalent source method (ESM) is proposed. Firstly, measurements are used to acquire complex pressures holographic surface. Secondly, with all measurement points as boundary conditions, single-layer potential ESM reconstruct pressure corresponding...
Abstract In practical acoustic measurement for large cylindrical surfaces, it is difficult to keep conformal and coaxial between the holographic surface reconstruction surface. To overcome this problem, a combined sound field method using non-conformal plane proposed in paper. Based on pressure measured plane, first reconstructs statistically optimal planar near-field holography, then holography. And least square optimization determine position of addition, ill-posed problems, an error...
Conventional model-driven operational transfer path analysis (OTPA) cannot update and optimize itself based on data characteristics, which weakens its accuracy reliability. Inspired by data-driven thinking of learning from data, this paper develops statistically OTPA. First, considering the statistical distribution characteristics potential errors in according to central limit theorem, factors affecting error calculating transmissibility are analyzed summarized. Then, constructing objective...
At present, people are under great pressure to survive, and there more sudden diseases coming along with it. The time that fail cure in due society occurs frequently. Therefore, based on this kind of phenomenon, paper combines fall alarm Beidou positioning, designs a new type detection system STM32 single chip microcomputer as the main control chip, which uses ADXL345 tilt sensor for detection, buzzer remote by sending real-time information through GSM module, so timely users. In addition,...
Abstract For the sound field of cylindrical or compact sources, current separation technique (FST) based on statistically optimized near-field acoustic holography (SONAH) uses planar wave for separation, and effects different functions have not yet been studied. However, non-conformal problem between hologram surface sources commonly has a risk accuracy reduction. Here, an FST nonplanar SONAH is proposed to solve this problem. First, considering that prediction will attenuate errors, noise...
This paper proposed a method on accurate phase matching control between the pulse laser and AC TIG arc in real time, laser-arc hybrid heat source system is developed as well. With utilization of this two typical cases that acts peak trough welding current waveform, effect regulations weld formation, penetration depth plasma shape are studied during magnesium alloy AZ61. Results indicate that, when acting formation better than trough. However, act deeper peak.
Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – 8, 2013.
In practical acoustical measurement for large cones, maintaining coaxial and conformal between the holographic surface reconstructed is usually tedious. To overcome this flaw, a conical near-field acoustic holography (NAH) based on cylindrical wave function of variable radius nonconformal plane proposed in paper. First, (VR)–based modified statistically optimal NAH (SOCNAH) method, entitled VR-SOCNAH, proposed, which more applicable to surfaces. Second, with measured sound pressure data...