A5100609626- Planetary Science and Exploration
- Seismic Imaging and Inversion Techniques
- Astro and Planetary Science
- Seismic Waves and Analysis
- Structural Health Monitoring Techniques
- Seismic Performance and Analysis
- Geology and Paleoclimatology Research
- Metallurgy and Material Forming
- Geophysical Methods and Applications
- Space Science and Extraterrestrial Life
- Vehicle Dynamics and Control Systems
- Mechanical stress and fatigue analysis
- Drilling and Well Engineering
- Advanced Differential Geometry Research
- Methane Hydrates and Related Phenomena
- Mechanical Engineering and Vibrations Research
- High-pressure geophysics and materials
- Hydraulic Fracturing and Reservoir Analysis
- Geophysical and Geoelectrical Methods
- High-Velocity Impact and Material Behavior
- Hydrocarbon exploration and reservoir analysis
- Metal Forming Simulation Techniques
- Welding Techniques and Residual Stresses
- Microstructure and Mechanical Properties of Steels
- Dynamics and Control of Mechanical Systems
Chinese Academy of Sciences
2014-2024
Institute of Mechanics
2024
Ningbo Institute of Industrial Technology
2022-2024
North China University of Water Resources and Electric Power
2024
Institute of Geology and Geophysics
2015-2023
Xi'an Shiyou University
2023
University of Chinese Academy of Sciences
2022
Nanjing Normal University
2022
China National Offshore Oil Corporation (China)
2022
Schlumberger (British Virgin Islands)
2022
A solid-state anaerobic digestion method is used to produce biogas from various solid wastes in China but the efficiency of methane production requires constant improvement. The diversity and abundance relevant microorganisms play important roles methanogenesis biomass. next-generation high-throughput pyrosequencing platform (Roche/454 GS FLX Titanium) provides a powerful tool for discovery novel microbes within biogas-generating microbial communities. To improve power our metagenomic...
Abstract Exploring the subsurface structure and stratification of Mars advances our understanding Martian geology, hydrological evolution palaeoclimatic changes, has been a main task for past continuing exploration missions 1–10 . Utopia Planitia, smooth plains volcanic sedimentary strata that infilled impact crater, prime target such as it is inferred to have hosted an ancient ocean on 11–13 However, 45 years passed since Viking-2 provided ground-based detection results. Here we report in...
Abstract As the largest basin on Mars, Utopia Planitia has both experienced and recorded variations of Martian palaeoclimate. Layered subsurface structures have been identified by ground-penetrating radar in southern but lateral subsurface, potentially linked to palaeoclimatic evolution, not investigated. Here we report frequency-variation patterns Zhurong reflections interpret them as buried polygonal terrain below a depth 35 m. Sixteen wedges were within ∼1.2 km distance, suggesting wide...
The Martian subsurface structure archives the magmatic activity, sedimentary processes, and meteorite impact history of Mars, making it a promising region for investigating geological evolution ancient water activities planet. On 15 May 2021, China’s first Mars mission, Tianwen-1, successfully landed on south Utopia Planitia released Zhurong rover to in-situ detect with equipped ground penetrating radar (Rover Penetrating Radar, RoPeR). Using low-frequency channel data recorded...
Martian polygonal terrain, widely distributed on the surface, provides valuable geological insights into environmental conditions during their formation, including aspects related to thermal and possibility of past aqueous activity Mars. First, we provide an overview terrain Mars, distribution, size, possible formation mechanisms. Second, in order quantitatively analyze geometric features relationship with ancient climate process images from High-Resolution Imaging Science Experiment...
Growing evidence supports the existence of subsurface water ice on Mars, though direct groundwater remains scarce. Using seismic data from seasonal marsquakes, we provide compelling for within approximately 2 meters surface, restricted to localized regions in northern mid-latitudes. The observed rapid variability marsquake activity suggests that changes pore pressure, driven by melting during warmer seasons, play a critical role triggering these events. This mechanism explains key...
Multi-cloud storage can provide better features such as availability and scalability. Current works use multiple cloud providers with erasure coding to achieve certain benefits including fault-tolerance improving or vendor lock-in avoiding. However, these only the multi-cloud in ad-hoc ways, none of them considers optimization issue general. In fact, key optimize is effectively choose parameters. Meanwhile, data placement should satisfy system application developers' requirements. As...
Finite element models were established to simulate the quenching processes of aluminum alloy 2024 blocks under different conditions. The surface cooling curves in quench media obtained by experiment. Inverse heat-transfer calculations applied determine coefficient curves. model was used predict residual stresses developed after process with thicknesses (20 mm ≤ d ≤70 mm) into two kinds quenchants (water and polyalkylene glycol solution). influence block thickness quenchant on investigated...
ABSTRACT This article aims at numerically simulating the 3D seismic wave propagation from rupture to structures. A two-step method coupling spectral element (SEM) and finite-element (FEM) is proposed based on domain reduction simultaneously simulate in large-scale regions analyze dynamic behavior of structures local sites. First, concept illustrated. In first step, entire area, involving source, media, region interest, simulated using SEM. second analysis structure-foundation system with...
Abstract Helium-3 ( 3 He) is a noble gas that has critical applications in scientific research and promising application potential as clean fusion energy. It thought the lunar regolith contains large amounts of helium, but it challenging to extract because most helium atoms are reserved defects crystals or solid solutions. Here, we find bubbles glassy surface layer ilmenite particles were brought back by Chang’E-5 mission. The special disordered atomic packing structure glasses should be...
In this study, four basalt rocks were selected to produce continuous fibers, the chemical composition of and corresponding fibers compared using XRF, results reveal that content component present in is consistent with rocks. The mass attenuation coefficient different was analyzed XCOM program, indicate when incident electron energy 0.01~0.1 MeV, fiber found be positively correlated Wt (Fe2O3 + MnO TiO2 CaO K2O). structure properties irradiated by absorption doses gamma rays studied SEM, EDX...
Abstract Experiencing heavy impacting, the Moon preserves a megaregolith in its shallow subsurface with physical properties that carry implications for lunar history. A strong scattering of seismic waves associated heterogeneous appears to be systematic, but deriving statistical law random heterogeneities has remained elusive. Apollo data are characterized by ultra‐long coda weak amplitude decay provide an opportunity explore extent heterogeneity crust. We obtain numerical simulation...
Abstract A physics-informed neural network (PINN) is a powerful tool for solving differential equations in solid and fluid mechanics. However, it suffers from singularly perturbed boundary-layer problems which there exist sharp changes caused by small perturbation parameter multiplying the highest-order derivatives. In this paper, we introduce Chien’s composite expansion method into PINNs, propose novel architecture namely, Chien-PINN (C-PINN) method. This PINN validated equations,...
ABSTRACT A multidimension source model for generating broadband ground motions with deterministic 3D numerical simulations is proposed in this article. In model, the composed of several superimposed layers, and total seismic moment assigned to these layers different proportions. Each layer exactly fills up fault uniformly divided into subsources size decreased progressively reflect levels rupture details. Hence, may consider realistic process an earthquake, that is, spatial temporal...