Qinglin Niu

ORCID: 0000-0002-3817-5039
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About
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Research Areas
  • Radiative Heat Transfer Studies
  • Combustion and flame dynamics
  • Gas Dynamics and Kinetic Theory
  • Rocket and propulsion systems research
  • Nuclear physics research studies
  • Nuclear Physics and Applications
  • Remote Sensing in Agriculture
  • Metamaterials and Metasurfaces Applications
  • Remote Sensing and LiDAR Applications
  • Quantum Chromodynamics and Particle Interactions
  • Thermal Radiation and Cooling Technologies
  • Probabilistic and Robust Engineering Design
  • Particle accelerators and beam dynamics
  • Computational Fluid Dynamics and Aerodynamics
  • Atomic and Molecular Physics
  • Smart Agriculture and AI
  • Advanced Antenna and Metasurface Technologies
  • Leaf Properties and Growth Measurement
  • Calibration and Measurement Techniques
  • Wind and Air Flow Studies
  • Plasmonic and Surface Plasmon Research
  • Spectroscopy and Chemometric Analyses
  • Atmospheric aerosols and clouds
  • Electromagnetic Launch and Propulsion Technology
  • UAV Applications and Optimization

North University of China
2020-2024

Henan Polytechnic University
2017-2024

Nanjing University
2024

Farmland Irrigation Research Institute
2024

Chinese Academy of Agricultural Sciences
2024

China University of Petroleum, East China
2021-2023

Institute of Pomology
2023

Northeastern University
2022

Harbin Institute of Technology
2016-2020

Ministry of Industry and Information Technology
2018-2020

Crop leaf chlorophyll content (LCC) and fractional vegetation cover (FVC) are crucial indicators for assessing crop health, growth development, maturity. In contrast to the traditional manual collection of trait parameters, unmanned aerial vehicle (UAV) technology rapidly generates LCC FVC maps breeding materials, facilitating prompt assessments maturity information. This study addresses following research questions: (1) Can image features based on pretrained deep learning networks ensemble...

10.3390/rs16050784 article EN cc-by Remote Sensing 2024-02-24

The infrared (IR) irradiance signature from rocket motor exhaust plumes is closely related to type, propellant composition, burn time, geometry, chamber parameters and flight conditions. In this paper, an analysis tool (IRSAT) was developed understand the spectral characteristics of in detail. Through a finite volume technique, flow field properties were obtained through solution axisymmetric Navier-Stokes equations with Reynolds-averaged approach. A refined 13-species, 30-reaction chemistry...

10.1016/j.cja.2017.04.003 article EN cc-by-nc-nd Chinese Journal of Aeronautics 2017-04-26

The high momentum tail (HMT) of nucleons, as a signature the short-range correlations in nuclei, has been investigated by high-energy bremsstrahlung γ rays produced 86Kr+124Sn at 25 MeV/nucleon. energetic photons are measured CsI(Tl) hodoscope mounted on spectrometer CSHINE. energy spectrum ≥35 MeV can be reproduced Isospin- and Momentum-Dependent Boltzmann-Uehling-Uhlenbeck model calculations incorporating photon production channel from np process which HMTs nucleons is considered. A...

10.1016/j.physletb.2024.138514 article EN cc-by Physics Letters B 2024-02-06

Hypersonic vehicles emit strong infrared (IR) radiation signatures that can be treated as a detecting source for object identification and routine diagnosis. This paper is aimed at examining the intrinsic characteristics of Boost-Glide Vehicle (BGV) under condition various Angles Attack (AOAs). A two-temperature model considering thermal chemical non-equilibrium effects coupled with Navier-Stokes equations solved by finite volume technique. gas–solid conjunction heat transfer also added into...

10.1016/j.cja.2019.01.003 article EN cc-by-nc-nd Chinese Journal of Aeronautics 2019-02-10

The spectral characterization of flow-field parameters provides a new perspective for understanding the spatiotemporal evolution unsteady supersonic exhaust plumes and extracting typical structures. In this study, large-eddy simulation is performed to calculate three-dimensional plume flow field rocket engines, proper orthogonal decomposition (SPOD) method with separation established. This approach used extract coherent structural features analyze mode space structure at different...

10.1063/5.0200576 article EN Physics of Fluids 2024-03-01

Maize is a globally important cereal and fodder crop. Accurate monitoring of maize planting densities vital for informed decision-making by agricultural managers. Compared to traditional manual methods collecting crop trait parameters, approaches using unmanned aerial vehicle (UAV) remote sensing can enhance the efficiency, minimize personnel costs biases, and, more importantly, rapidly provide density maps fields. This study involved following steps: (1) Two UAV sensing-based were developed...

10.3390/drones8040140 article EN cc-by Drones 2024-04-03

10.1016/j.ijheatmasstransfer.2018.07.007 article EN International Journal of Heat and Mass Transfer 2018-07-14

To achieve a detailed understanding of underexpanded supersonic jet structures influenced by afterburning and other flow conditions, the turbulent with without combustions are investigated computational fluid dynamics (CFD) method. A program based on total variation diminishing (TVD) methodology capable predicting complex shocks is created to solve axisymmetric expanded Navier–Stokes equations containing transport species. The finite-rate ratio model employed handle species sources in...

10.1016/j.cja.2014.04.003 article EN cc-by-nc-nd Chinese Journal of Aeronautics 2014-04-24

A systemic and validated model was developed to predict ultraviolet spectra features from the shock layer of near-space hypersonic vehicles in "solar blind" band region. Computational procedures were performed with 7-species thermal non-equilibrium fluid mechanics, finite rate chemistry, radiation calculations. The flow field calculated a two-temperature by volume technique verified against bow-shock ultra-violet (BSUV) flight experiments. absorption coefficient mixture gases evaluated...

10.1016/j.cja.2016.04.021 article EN cc-by-nc-nd Chinese Journal of Aeronautics 2016-09-02

The bandwidths of thermal-tunable metamaterial perfect absorbers (MPAs) based on the phase change materials such as Ge2Sb2Te5 and VO2 are usually hundreds nanometers at near-infrared frequency. Amorphous silicon (a-Si) provides approach to achieve linearly ultra-narrowband MPAs, if absorption band is narrow enough. Four-nanorod-coupled a-Si resonators proposed in this Letter. An 1064 nm obtained with ultra-narrow bandwidth (FWHM) only 1.4 by exciting coupled magnetic dipole (CMD) mode, which...

10.1364/ol.44.003885 article EN Optics Letters 2019-07-30

A hypersonic electromagnetic railgun projectile undergoes severe aero-heating with an increase in altitude. The purpose of this study was to investigate the characteristics shock layer flow field as well thermal environment blunt body wall a at different launching angles. two-temperature model considers nonequilibrium effect and is introduced into Navier–Stokes (N-S) equation, it solved using finite volume method (FVM). reliability calculation terms properties composition production verified...

10.3390/en16041740 article EN cc-by Energies 2023-02-09

The nucleon-nucleon short-range correlation (NN-SRC) is one of the key issues nuclear physics, which typically manifest themselves in high-momentum components momentum distributions. In this paper, spectral functions based on axially deformed relativistic mean-field model are developed to involve NN-SRC. With functions, inclusive electron scattering $(e,{e}^{\ensuremath{'}})$ cross sections calculated within plane-wave impulse approximation (PWIA) framework, including quasielastic (QE) part...

10.1103/physrevc.105.l051602 article EN Physical review. C 2022-05-23
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