- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Fiber Laser Technologies
- Taxation and Compliance Studies
- Advanced SAR Imaging Techniques
- Advanced Frequency and Time Standards
- Corporate Taxation and Avoidance
- Aerogels and thermal insulation
- Advanced Data Compression Techniques
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Advanced Algorithms and Applications
- Quantum optics and atomic interactions
- Underwater Vehicles and Communication Systems
- Semiconductor Lasers and Optical Devices
- Physics of Superconductivity and Magnetism
- Auditing, Earnings Management, Governance
- Spectroscopy and Laser Applications
- Inertial Sensor and Navigation
- Surface Modification and Superhydrophobicity
- Smart Agriculture and AI
- Granular flow and fluidized beds
- Advanced Computational Techniques and Applications
- Remote Sensing in Agriculture
- Target Tracking and Data Fusion in Sensor Networks
- Soil Mechanics and Vehicle Dynamics
- Web and Library Services
Jilin University
2023-2024
Chinese Academy of Sciences
2019-2023
Aerospace Information Research Institute
2022-2023
Tongji University
2022-2023
Tianjin Chengjian University
2022
University of Chinese Academy of Sciences
2010-2022
University of Colorado Boulder
2018-2021
National Institute of Standards and Technology
2018-2021
Institute of Remote Sensing and Digital Earth
2012-2019
Tsinghua University
2016
We report three-dimensional trapping of an oxide molecule (YO), using a radio-frequency magneto-optical trap (MOT). The total number molecules loaded is $\sim$1.5$\times10^4$ , with temperature 7(1)~mK. This diversifies the frontier that are laser coolable and paves way for second-stage narrow-line cooling in this to microkelvin regime. Futhermore, new challenges creating 3-D MOT YO resolved here indicate MOTs more complex non-linear should be feasible as well.
The effectiveness of environmental, social, and governance (ESG) has been widely discussed is often linked to corporate sustainability strategies. However, ESG performance cannot be achieved without the support financial development underlying mechanisms through which fintech affects in emerging markets remain unexplored. Firms that are less financially constrained exhibit higher cities with better developed fintech. Moreover, results robust after addressing endogeneity between using...
Complex molecular structure demands customized solutions to laser cooling by extending its general set of principles and practices. Yttrium monoxide (YO) has unique intramolecular interactions. The Fermi-contact interaction dominates over the spin-rotation coupling, resulting in two manifolds closely spaced states, with one them possessing a negligible Land\'e g-factor. This energy level favors dual-frequency DC magneto-optical trapping (MOT) gray molasses (GMC). We report exceptionally...
We observe new Feshbach resonances in ultracold mixtures of $^{85}$Rb and $^{87}$Rb atoms the $^{85}$Rb$|2, +2\rangle$+$^{87}$Rb$|1, +1\rangle$ -2\rangle$+$^{87}$Rb$|1, -1\rangle$ scattering channels. The positions properties are predicted characterized using semi-analytic multichannel quantum-defect theory by Gao. Of particular interest, a number broad entrance-channel dominated p-wave identified, implicating exciting opportunities for studying variety interaction physics.
Global sea level rise is a major environmental concern for many countries and cities, particularly low-lying coastal areas where urban development threatened by the combined effects of land subsidence. This study employed an improved two-layer network Persistent Scatterers Interferometric Synthetic Aperture Radar (PS-InSAR) technology to obtain high-precision subsidence in Singapore from 2015 2019. Landsat images 1973 2020 were also utilized extract changes Singapore’s coastline. Geological,...
Benchmark relativistic coupled-cluster calculations for yttrium monoxide (YO) with accurate treatment of and electron correlation effects are reported.
We report laser cooling and trapping of yttrium monoxide molecules in an optical lattice. show that gray molasses remains exceptionally efficient for inside the lattice with a molecule temperature as low 6.1(6) μK. This approach has produced trapped sample 1200 molecules, peak spatial density ∼1.2×10^{10} cm^{-3}, phase-space ∼3.1×10^{-6}. By ramping down depth, we cool further to 1.0(2) μK, 20 times colder than previously reported laser-cooled trap.
Clouds in optical remote sensing images are an unavoidable existence that greatly affect the utilization of these images. Therefore, accurate and effective cloud detection is indispensable step image preprocessing. To date, most researchers have tried to use deep-learning methods for detection. However, studies generally computer vision technology improve performances models, without considering unique spectral feature information Moreover, due complex changeable shapes clouds, cloud-edge...
Feature-based methods have been developed in the past decades for registration of optical satellite images. However, it is still a challenging problem to handle well between medium and high spatial resolution images due large difference structural features local details same objects. In this study, an automated co-registration technique proposed that integrates improved SIFT (I-SIFT) novel matching strategy called consistency constraints (SCC) cope with resolutions image pair. Three on...
With the features of exceptional computing power, low-cost, low power consumption characteristics, CPU-GPU heterogeneous platform provides an alternative choice for high performance parallel computing. This paper introduces efficient SAR imaging system design and implementation, which is based on such platform. Tested with Envisat ASAR raw data, meets demands real-time processing. Furthermore, GPU-based results in a 13 times speed up than multithreaded CPU implementation.
Abstract This study examined the impact of inquiry letters on corporate tax aggressiveness based special system in Chinese stock exchanges. It found that receipt significantly inhibited aggressiveness. The channel through which worked involved a monitoring effect related‐party transactions. disincentive was mainly firms with overseas operations, low‐quality internal control, and weak enforcement. Examining textual information letters, results show more questions demand for specific opinion...
As different faces have features, the degree of memorability are different, which named in this paper. We mainly study relation between and features such as geometrical faces, location eyes, size mouth eyes Histogram Oriented Gradient (HOG). use SVR model to regress face images, predict score. Finally, we spearman rank correlation coefficient residual sum-of-squares error analyze predicted score with ground truth.
多普勒调频率是SAR方位向压缩的关键参数之一. 调频率的失配会带来严重的方位向散焦, 从而影响成像质量. 基于减灾、防灾目的, 需要对SAR数据快速成像, 从而相应要求对多普勒调频率进行快速估计处理. 根据多普勒调频率快速估计需求, 提出了一种基于轨道参数法和Map Drift算法估计多普勒调频率的综合反演算法, 利用多普勒调频率与距离的关系, 简化整个估计流程, 从而提高估计速度. 同时给出了一种块数据筛选的方法, 用于选择综合反演法中所采用的块数据. 实验结果表明, 综合反演法能够在满足成像质量要求的基础上, 快速估计出多普勒调频率.
Based on the special stock exchange comment letter system in China, this paper explores relationship between tax-related letters and corporate tax avoidance behavior from standpoint of securities regulation. We document that firms engage more aggressive are likely to receive a letter. Also, relative receiving non-tax-related letter, reduce their behaviors subsequent years. Further study shows number questions greater level detail stronger effect avoidance. After examining sample with...
In this paper, Rice Lossless Data Compression Algorithm recommended by CCSDS (Consultative Committee for Space Systems) is introduced. Then, a method of software implementation Furthermore, to improve the speed decompression algorithm, an improvement suggested. Finally, test algorithm used in LDCM (Landsat Continuity Mission) satellite ground system finished.
This paper studies the frequency resolution of two existing spectral estimators, where one is a generalization minimum variance estimators (GMVSE) and other Pisarenko's non-linear (PNLSE). By this study, we show uncovered relationship between parameter for both GMVSE PNLSE. The results bring out clear guideline on choosing parameters PNLSE to avoid missing any sinusoids.