A5100756021- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Nuclear and radioactivity studies
- Magnetic confinement fusion research
- Maritime Transport Emissions and Efficiency
- Ship Hydrodynamics and Maneuverability
- Geophysics and Gravity Measurements
- Radioactive element chemistry and processing
- Geomagnetism and Paleomagnetism Studies
- Air Quality Monitoring and Forecasting
- Gamma-ray bursts and supernovae
- Laser-induced spectroscopy and plasma
- Inorganic and Organometallic Chemistry
- Ocean Waves and Remote Sensing
- Oil, Gas, and Environmental Issues
- Petroleum Processing and Analysis
- Geological and Geophysical Studies
- Plant Surface Properties and Treatments
- Spectroscopy and Chemometric Analyses
- Biofield Effects and Biophysics
- Chemical Synthesis and Characterization
- Stochastic Gradient Optimization Techniques
- Calibration and Measurement Techniques
Soochow University
2022-2025
Guangxi University
2021-2025
China University of Petroleum, Beijing
2020-2024
Shanghai Jiao Tong University
2008-2020
Canon (Japan)
2020
Shanghai Ocean University
2020
Purple Mountain Observatory
1987-2008
Lithium Power (United States)
2007
Chinese Academy of Sciences
1992-1998
Hohai University
1995
To study the effect of soil erosion on distribution and migration pattern radionuclides, levels 239+240Pu 137Cs in alpine meadow were measured Hongsongwa Nature Reserve, Hebei Province. The activities surface ranged from 0.028 to 2.781 Bq/kg 1.3 59.8 Bq/kg, respectively. is uneven significantly correlated with organic matter content altitude variations within area. Core samples collected both ridge valley locations assess rates, revealing that areas experienced approximately 2.5 times higher...
Abstract The spatial distributions of 239+240 Pu and 137 Cs in soils from Longji Rice Terraces were investigated to evaluate soil erosion. activity concentrations the surface paddy fields range 0.089–0.734 1.80–7.88 mBq/g, respectively. activities showed very similar distribution trends, first increasing then decreasing with elevation. 240 Pu/ 239 atom ratios ranged 0.162 0.232. cores tended be uniformly distributed within plowed layer declined exponentially below this depth. mean erosion...
To establish a 239+240Pu, 137Cs, and heavy metal reference soil site in Northeast China, three grassland cores were collected from the Lao-Ye-Ling Mountain, which is branch of Chang-Bai Mountains. The activities range 0.041–2.752 mBq/g for 239+240Pu 0.2–57.6 137Cs. 240Pu/239Pu atomic ratios 0.161–0.186, showing that study area originated global fallout. Also, excess 210Pb enriched surface soil. convective–dispersion equation model provided lower apparent dispersion coefficients (D)...
An optimization model for the parameters of pressure-resistant lens an optical particle counter, based on Gaussian optics theory, was established to increase measurement accuracy counter high-pressure natural gas. Comparing experimental and calculated values calibrated model, when is displaced by 2 mm under atmospheric pressure, relative error measured body deformation 0.15%. When air pressure varies in range 0.10-5.09 MPa, maximum volume with change refractive index 0.13%, which shows that...
Electron-acoustic solitary waves have been studied in an electron-beam plasma system. It is found that the solution of compressive soliton only exists within a limited range velocity around electron beam velocity. A electron-acoustic always accompanies with cold density hole. This theoretical model used to explain `fast wave' event observed by FAST satellite mid-altitude auroral zone.
Online measurement of particulate matter in high-pressure natural gas is great significance to the purification process and safe operation long-distance pipelines. However, pressure changes pipelines are complicated. The optical particle counter (OPC) affected by change refractive index gas, which causes an error measured size. In order solve this problem, based on theory geometric optics, optimization model aerosol tube spherical window regarding was established. This basically eliminates...
Recent methods have significantly reduced the performance degradation of Binary Neural Networks (BNNs), but guaranteeing effective and efficient training BNNs is an unsolved problem. The main reason that estimated gradients produced by Straight-Through-Estimator (STE) mismatches with real derivatives. In this paper, we provide explicit convex optimization example where traditionally adaptive still faces risk non-convergence, identify constraining range critical for optimizing deep binary...
The abundance enhancements of heavy ions Ne, Mg, Si and Fe in impulsive solar energetic particle (SEP) events are explained by a plasma acceleration mechanism. In consideration the fact that coronal, is mainly composed hydrogen helium ions, we think ion-ion hybrid wave quasi-perpendicular can be excited electron beam flares. These waves may resonantly absorbed when frequencies these close to second-harmonic gyrofrequencies ions. This requires coronal temperature located range T~(5-9)×106 K...
A self-focusing modulation instability of whistler wave has been investigated in the frequency region ωci < ω ≪ ωce. It is found that ion term contribution should be taken into account. The results show necessary condition depends on pitch angle perturbation wave.
The effects of the propagation angle electromagnetic waves and pitch non-thermal electrons on electron cyclotron maser instability beam–plasma are compared. It is pointed out if direction opposite to injected electrons, will be suppressed, hence it cannot explain radiation with narrow bandwidth excited by energetic propagating downwards in solar flares, such as millisecond spikes, blips type III bursts positive-frequency drift. This discrepancy may solved non-resonant wave–particle...
ABSTRACT: In order to investigate the 239+240Pu potential influence in ocean, and develop a new method for rapidly monitoring radioactive pollution, spatial distribution South China Sea (SCS) Indian Ocean (IND) sediments is analyzed by SF-ICP-MS (ELEMENT 2). The inventory-weighted mean activities of were 0.413 mBq/g, 0.128 0.483 mBq/g SCS, eastern IND, Arabian Sea, respectively. activity SCS was influenced current, vertical Pu, transport particulate matter. IND could be impacted Antarctic...
Based on Gaussian optical theory, an optimized particle counter was used to measure the oil mist concentration in high-pressure natural gas pipelines, and results showed that error within 4%.
Abstract not Available.