23 Result(s)
within
**aoDong Yang
Physics
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Article
Acid wet blasting method for fabricating superhydrophobic aluminum surface with micro-nano composite structures
A superhydrophobic surface is an ideal choice to enhance the corrosion resistance of aluminum (Al) and Al-based alloys which are widely used in various industrial fields. However, there are limitations in the ...
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Article
Open AccessStatistical law of laser echo disturbance characteristics under atmospheric turbulence
Atmospheric turbulence significantly affects laser transmission and echo. The size of the echo cross section and the distribution of energy are important parameters to obtain target information. In this paper,...
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Hardware-efficient quantum principal component analysis for medical image recognition
Principal component analysis (PCA) is a widely used tool in machine learning algorithms, but it can be computationally expensive. In 2014, Lloyd, Mohseni & Rebentrost proposed a quantum PCA (qPCA) algorithm [Nat....
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Open AccessStudy on laser transmission interference characteristics based on atmospheric turbulent medium
The characteristics of laser transmission interference in the atmospheric turbulent medium are studied in this paper in order to obtain the target interference image with atmosphere as the transmission medium ...
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Article
Doppler-free dual-excited state spectroscopy and its application for measurement of hyperfine structure of 6D5/2 level of 133Cs
Based on cesium 6S1/2—6P3/2—6D5/2 (852 nm + 917 nm) ladder-type system, we simultaneously obtain the Doppler-free saturated absorption spectroscopy (SAS) between the 6S1/2 → 6P3/2 transition and optical–optical d...
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Article
Open AccessExperimental critical quantum metrology with the Heisenberg scaling
Critical quantum metrology, which exploits quantum critical systems as probes to estimate a physical parameter, has gained increasing attention recently. However, the critical quantum metrology with a continuo...
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Article
Size, morphology, and composition of lunar samples returned by Chang’E-5 mission
This study focuses on the physical and chemical properties of surficial lunar regolith (LR) samples returned from the Moon by the Chang’E-5 (CE-5) mission. Insights regarding the effect of a new sampling geolo...
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Training Bases of the Dwarf Troops
To train competent combat dwarf troops, scientists set up various training bases, big or small. How do the training bases look like from the inside?
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Article
The role of lanthanum in improving the visible-light photocatalytic activity of TiO2 nanoparticles prepared by hydrothermal method
In this work, the La-doped TiO2 (La–TiO2) nanoparticles with different La content were successfully synthesized by hydrothermal method aiming at enhancing the visible-light photocatalytic performance. The as-prep...
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Article
Open AccessProbe optimization for quantum metrology via closed-loop learning control
Experimentally achieving the precision that standard quantum metrology schemes promise is always challenging. Recently, additional controls were applied to design feasible quantum metrology schemes. However, t...
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Article
Open Access3D Janus plasmonic helical nanoapertures for polarization-encrypted data storage
Helical structures have attracted considerable attention due to their inherent optical chirality. Here, we report a unique type of 3D Janus plasmonic helical nanoaperture with direction-controlled polarization...
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Article
An Improved Calibration Framework for Iterative Self-Consistent Parallel Imaging Reconstruction (SPIRiT)
The image quality of iterative self-consistent parallel imaging reconstruction (SPIRiT) algorithm highly depends on the accuracy of linear coefficients which can be easily influenced by k-space noise. In this stu...
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Article
Open AccessSpin-controlled wavefront sha** with plasmonic chiral geometric metasurfaces
Metasurfaces, as a two-dimensional (2D) version of metamaterials, have drawn considerable attention for their revolutionary capability in manipulating the amplitude, phase, and polarization of light. As one of...
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Article
Planar Gradient Coil Design Using L1 and L2 Norms
We present a novel and general formulation for the optimisation of gradient coils, wherein the minimization of the conductor length and the simplicity of construction are two of the main design parameters. The...
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Article
Design and Demonstration of Four-Channel Received Coil Arrays for Vertical-Field MRI
The layout of radio-frequency received coils is related to signal-to-noise ratio (SNR) in magnetic resonance imaging (MRI). In this paper, different structures of four-channel received coil arrays for vertical...
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Article
Design and Optimization of a Four-Channel Received Coil for Vertical-Field MRI
Signal-to-noise ratio (SNR) is an important factor in magnetic resonance imaging (MRI), and it strongly depends on the structure of radio frequency (RF) coils. To obtain a high SNR and uniform image in a verti...
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Article
Compositional and structural properties of pulsed laser-deposited ZnS:Cr films
We present the properties of Cr-doped zinc sulfide (ZnS:Cr) films deposited on Si(100) by pulsed laser deposition. The films are studied for solar cell applications, and to obtain a high absorption, a high Cr...
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Article
Shim Coils Design for Halbach Magnet Based on Target Field Method
A modified target field method is presented to the construction of shim and gradient coils for Halbach-type magnet featuring cylindrical magnet and transversal magnetic field direction. With Biot–Savart law, m...
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Article
Optimized Phase-Sensitive Inversion Recovery for MRI Contrast Manipulation
In this paper, we propose a practical optimized phase-sensitive inversion recovery approach for longitudinal contrast enhancement of tissues. With the usage of double dynamic range of longitudinal magnetizatio...
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Article
Experimental realization of three-dimensional indefinite cavities at the nanoscale with anomalous scaling laws
Metamaterials allow for extraordinary electromagnetic properties that are not attainable in nature1,2,3,4,5,6,7,8,9. Indefinite media with hyperbolic dispersion, in particular, have found intriguing applications1...
