A5069940782- Quantum optics and atomic interactions
- Atomic and Subatomic Physics Research
- Advanced MRI Techniques and Applications
- Numerical methods in inverse problems
- Image and Signal Denoising Methods
- Statistical and numerical algorithms
- Photonic and Optical Devices
- Advanced Computational Techniques and Applications
- Random lasers and scattering media
- Inertial Sensor and Navigation
- Metamaterials and Metasurfaces Applications
- Credit Risk and Financial Regulations
- Structural Health Monitoring Techniques
- Blasting Impact and Analysis
- Geophysics and Gravity Measurements
- 3D Surveying and Cultural Heritage
- Simulation and Modeling Applications
- Photonic Crystals and Applications
- Monetary Policy and Economic Impact
- Neural Networks and Reservoir Computing
- Grey System Theory Applications
- Remote Sensing and LiDAR Applications
- Financial Risk and Volatility Modeling
- Geoscience and Mining Technology
- Advanced Decision-Making Techniques
Harbin Institute of Technology
2019-2024
Suzhou Institute of Nano-tech and Nano-bionics
2019-2023
Chinese Academy of Sciences
2009-2023
Endicott College
2023
Hohai University
2009-2012
Institute of Geodesy and Geophysics
2009
Optical deep learning based on diffractive optical elements offers unique advantages for parallel processing, computational speed, and power efficiency. One landmark method is the neural network (D2NN) three-dimensional printing technology operated in terahertz spectral range. Since bandwidth involves limited interparticle coupling material losses, this paper extends D2NN to visible wavelengths. A general theory including a revised formula proposed solve any contradictions between...
Polarization imaging is an important branch of the microscopy technique that can provide additional information and enhanced contrast. The illumination system a polarization microscope enables many different polarizations but makes setup bulky, complicated, slow. Here, we design fabricate ultrathin planar axicon metalens also parallel with polarizations. Our results reveal diffraction-limited size high degree linear polarization. To verify our approach, accurately map angle aluminum grating,...
Abstract Quantitative assessments of the level and lifetime alkali metal in atomic vapor cells are essential for improving stability magnetometers. In this paper, a fast non-destructive approach is proposed to directly characterize 87 Rb hermetic MEMS cell. The MEMS-compatible evaporation technique developed dispense with high efficiency. morphology metallic cell visualized by X-ray technique, measured contact angle 43° ± 2°. Combined image recognition, quantitative characterization...
This paper presents a robust algorithm for the registration of building point clouds based on planar features when there are no targets in scanning process. First, obtaining normal vectors planes that fitted from segmented overlapping areas is absolutely necessary to generate completed three-dimensional models. Then mathematical model can be established by using character Rodriguez Matrix. Furthermore, accuracy analyzed and compared with Iterative Closest Point (ICP) algorithm, results show...
Accurate characterization of atomic vapor cells is crucial for enhancing the sensitivity miniature magnetometers. In this study, a fast and efficient approach developed to characterize relaxation properties inner surface 87Rb micro-electro-mechanical systems (MEMS) cell. Based on zero-field level crossing effect, transverse rate was experimentally determined, depolarization coefficient 0.097 atom-wall collisions in MEMS cell obtained. The experiments demonstrated that alkali-wall collision...
Here we achieved the structured light patterns of a pseudorandom dot array by single diffractive optical element. The can be applied to achieve three-dimensional imaging. First, was generated proposed improved encoding methods, which are an formula-method-based algorithm and enumeration-method-based algorithm. Second, elements were designed as projectors generate dots Gerchberg-Saxton Pseudorandom arrays with different sizes validate methods. A maximal size 713×449 experimentally achieved....
The third Nanjing Yangtze River Bridge is a steel pylon cable stayed bridge. Such structure new in China and therefore brings challenges to the work of control surveys. This paper describes survey methods used for building erecting pylons construction tower. adopted have proven successful can be as reference similar projects future.
Vapor cells as the key part of chip-scale atomic clocks determine their volume stability and power consumption. Micro-fabrication, especially cavity packaging, is challenging. In this paper, micro-fabricated rubidium vapor are fabricated Au-In TLP bonding with asymmetric metal configuration proposed designed to package wafer-scale cell chips at a low processing temperature 200 °C. Tests show that intermetallic compounds AuIn2 AuIn uniformly formed in interlayer, indicating bonded interlayer...
In allusion to the problems that conventional wavelet neural network has disadvantages of training slowly, convergence local minimum easily and poor approximation performance, two aspects including initial parameters selection methods were selected be optimized after analyzing its performance. A kind self-adaptive method get number hidden layer nodes was put forward. And WNN model based on SCG optimization algorithm constructed, combining with setting self-correlation. The been used predict...
Toward the ill-conditioned Problem of Gauss-Markov model, analyze causes and all kinds methods, emphatically research computational process Two-Step method. Extending simplifying method, give a new method for solving problem, Matrix Parameterization Finally through analog computation, verify feasibility quality
This paper focuses on the spillover effect of quantitative easing (QE) policy adopted by United States China's multi-level bond market under outbreak epidemic in 2020. Since US launched QE March 2020 and ended it October 2021, this selects yields one-year treasury bonds, financial local government bonds period to represent different issuers non-borrowed reserve as an indicator measure level capital overflow. Then, adopts vector autoregressive (VAR) model for empirical analysis. The results...
Toward the ill-conditioned Problem of Gauss-Markov model, analyze causes and all kinds methods, emphatically research computational process Two-Step method.Extending simplifying method, give a new method for solving problem, multi-step method.Detailedly expound it.Simulate an model compute its parameter estimations by some different methods.Finally through analog computation, verify feasibility quality method.