A5063290329- Acoustic Wave Phenomena Research
- Topological Materials and Phenomena
- Mechanical and Optical Resonators
- Acoustic Wave Resonator Technologies
- Metamaterials and Metasurfaces Applications
- Image and Signal Denoising Methods
- Structural Behavior of Reinforced Concrete
- Geology and Paleoclimatology Research
- Ultrasonics and Acoustic Wave Propagation
- Geological formations and processes
- Aerodynamics and Acoustics in Jet Flows
- Structural Load-Bearing Analysis
- Advanced Data Compression Techniques
- Photonic Crystals and Applications
- Speech and Audio Processing
- Seismic Waves and Analysis
- Geophysical Methods and Applications
- Modular Robots and Swarm Intelligence
- DNA and Biological Computing
- Mathematical Analysis and Transform Methods
- Structural Response to Dynamic Loads
- Seismic Performance and Analysis
- Advanced biosensing and bioanalysis techniques
- Magnetic Properties and Applications
- Underwater Acoustics Research
Southwest Jiaotong University
2016-2024
Hebei University of Technology
2024
Shantou University
2020-2024
Weifang University
2024
Tongji University
2017-2022
China University of Geosciences
2020
Peking University
2007-2008
Yanshan University
2003
Distinct from the phononic valley pseudospin, real physical spin of elastic waves adds a novel tool kit capable envisaging valley-spin physics topological crystals local viewpoint. Here, we report observation as well hidden spin-valley locking mechanism overlooked before. We demonstrate that selective one-way routing phonon states along interface can be reversed by imposing metasource at different locations with opposite correspondence. unveil directionality controlled chiral coupling...
Abstract The topological properties of elastic waves underpin the visions widespread novel phonon devices such as rainbow trapping. In this work, a shamrock-leaf perforated phononic crystal with graded interface is designed to achieve both edge states (TES) and effect together. mechanism activated by varying TES along gradient uncovered, spatial trapped different frequencies are presented. Meanwhile, based on effect, wave packet behaviors encountering various types defects at interfaces...
Directional routing of one-way classical wave has raised tremendous interests about spin-related phenomena. This sparks specifically the elastic study pseudo-spin in meta-structures to perform robust manipulations. Unlike mathematics, intrinsic spin angular momentum is predicted quite recently which exhibits selective excitation unidirectional propagation even conventional solids. However, due challenge building up chiral sources, experimental observation still missing. Here, we successfully...
Transverse spin of surface waves is a universal phenomenon which has recently attracted significant attention in optics and acoustics. It appears gravity water waves, plasmon polaritons, acoustic exhibits remarkable intrinsic spin-momentum locking, found useful applications for efficient spin-direction couplers. Here we demonstrate, both theoretically experimentally, that the transverse elastic (Rayleigh) an anomalous sign near surface, opposite to case electromagnetic, sound, or waves. This...
Abstract Topological phononic cavities, such as ring resonators with topological whispering gallery modes (TWGMs), offer a flexible platform for the realization of robust circuits. However, chiral mechanism governing TWGMs and their selective routing in integrated circuits remain unclear. This work reveals, both experimentally theoretically, that at interface, elastic spin texture is intricately linked to, can be explained through knowledge of, phonon eigenmodes inside each unit cell....
We investigate the propagation of surface acoustic wave through phononic crystals (PCs) that consist composite pillars, comprising a cap metallic pillar and bottom epoxy on semi-infinite substrate. The computation band structures, together with measured transmission spectra, shows important role in engineering structures for its Young's modulus one order magnitude smaller than pillar. also discuss conditions ignoring influences PCs featuring extremely high pillars. finally modify height to...
Parameters of geomorphological characteristics are critical for research on yardangs. However, methods which low-cost, accurate, and automatic or semi-automatic extracting these parameters limited. We present here techniques this purpose. They object-based image analysis (OBIA) Canny edge detection (CED), using free, very high spatial resolution images from Google Earth. chose yardang fields in Dunhuang west China to test the methods. Our results showed that extractions registered an overall...
Abstract Topological phononics are well known for their topological edge states (TES) due to backscattering immunity and pseudospin-dependent phonon transport. Here, we study two types of TES on valley phononic crystal (PC) plates. We magnify the transversely symmetric antisymmetric properties by observing displacement distribution in both simulations experiments. underline theoretical origin based a simplified mass-spring model, i.e. combination phase difference caused periodicity PC plate...
Harvesting multi-frequency sound energy from environmental noise is a meaningful topic to supply for potential devices. In this work, we constructed an array of Helmholtz resonators (HRs) with cross-linked polypropylene (IXPP) ferroelectret films on the inner walls HR cavities, whose resonant frequencies range 300 800 Hz and quasi-static piezoelectric coefficient d33 230 pC/N. The harvesting performance IXPP investigated, both theoretically experimentally, in single various sizes, showing...
The fusion of multispectral (MS) and panchromatic (PAN) images is a useful technique to enhance the spatial quality low-resolution MS images. standard data methods may not be satisfactory because they can alter spectral information content. In this paper, we present new method by combining 2D EMD (two dimensional empirical mode decomposition) with IHS (Intensity-Hue-Saturation). Empirical decomposition (EMD) catches people's attention for analyzing nonstationary signals adaptively. To get...
Wave guiding is important in acoustic circuits for on-chip devices that are essential several fields, including telecommunication, sensing, and medical imaging. Designing configurable still its early stages, however. The authors construct guides by adding a line of hollow pillars to forest solid on thin plate, demonstrate evidence due the whispering-gallery mode. They also show interesting phenomena, such as evolution guided beam pattern asymmetric transmission plate waves. These results...