A5042803416- Astro and Planetary Science
- Advanced Welding Techniques Analysis
- Stellar, planetary, and galactic studies
- Titanium Alloys Microstructure and Properties
- Astronomical Observations and Instrumentation
- Intermetallics and Advanced Alloy Properties
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Welding Techniques and Residual Stresses
- Numerical methods in engineering
- Planetary Science and Exploration
- Fluid Dynamics Simulations and Interactions
- Astrophysical Phenomena and Observations
- Metal and Thin Film Mechanics
- Aluminum Alloys Composites Properties
- Metallurgy and Material Forming
- Astrophysics and Cosmic Phenomena
- Metal Forming Simulation Techniques
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Advanced ceramic materials synthesis
- Magnesium Alloys: Properties and Applications
- Laser and Thermal Forming Techniques
- Adaptive optics and wavefront sensing
- Scientific Research and Discoveries
Hunan Normal University
2025
Wuhan University
2024
Commercial Aircraft Corporation of China (China)
2013-2024
Liaoning Technical University
2024
Dalian University of Technology
2013-2022
Shenzhen University
2018-2019
University of Mississippi
2019
University of Missouri
2017
Shanghai Astronomical Observatory
1999-2014
University of Science and Technology Liaoning
2011
The blisk composed of Ti2AlNb intermetallic alloy and Ti60 titanium with its dual properties is considered as the ideal high-performance component in advanced aeroengines. There are incompatibilities at interface during welding using conventional fusion techniques like electron beam. In this work, dissimilar joint was successfully produced employing linear friction welding, a whose strength over that base metal obtained. intergrowth bonding mechanism promoted by combined effects dynamic...
We present the final installment of an intensive 13 year study variations optical continuum and broad Hβ emission line in Seyfert 1 galaxy NGC 5548. The database consists 1530 measurements 1248 measurements. follow closely, with a typical time delay about 20 days. However, year-by-year analysis shows that magnitude emission-line is correlated mean flux. argue data are consistent simple model prediction between size broad-line region ionizing luminosity, r ∝ L. Moreover, apparently linear...
We present the results of extensive multi-frequency monitoring radio galaxy 3C 120 between 2002 and 2007 at X-ray, optical, wave bands, as well imaging with Very Long Baseline Array (VLBA). Over 5 yr observation, significant dips in X-ray light curve are followed by ejections bright superluminal knots VLBA images. Consistent this, flux 37 GHz anti-correlated leading variations. This implies that, this galaxy, radiative state accretion disk plus corona system, where X-rays produced, has a...
Abstract This paper studies the application of Simulink in vehicle dynamics simulation and its effect analysis. First, basic parameters vehicle, gearbox characteristics design goals are elaborated detail, laying foundation for construction subsequent models. Then, platform wide field engineering outlined, emphasizing advantages simulation. Subsequently, a model was constructed based on platform. By deriving key modeling formulas, dynamic performance under different working conditions...
Results of a ground-based optical monitoring campaign on 3C 390.3 in 1994-95 are presented. The broad-band fluxes (B, V, R, and I), the spectrophotometric continuum flux F(5177) integrated emission-line Ha, Hb, Hg, HeI, HeII all show nearly monotonic increase with episodes milder short-term variations superposed. amplitude increases decreasing wavelength (4400-9000 A). follow ultraviolet X-ray time delays, measured from centroids cross- correlation functions, typically around 5 days, but...
GH4169 joints manufactured by Linear Friction Welding (LFW) are subjected to tensile test and stair-case method evaluate the High Cycle Fatigue (HCF) performance at 650 ℃. The yield ultimate strengths 582 MPa 820 MPa, respectively. HCF strength of joint reaches 400 which is slightly lower than that Base Metal (BM), indicating reliable quality this type joint. microstructure observation results show all cracks initiate inside specimens transfer into deeper region with decrease external...
In this study, a new linear friction welding (LFW) process, embedded LFW was put forward, which mainly applied to combination manufacturing of long or overlong load-carrying titanium alloy structural components in aircraft. The interfacial plastic flow behavior and bonding mechanism process were investigated by developed coupling Eulerian-Lagrangian numerical model using software ABAQUS novel thermo-physical simulation method with designed hot compression specimen. addition, the formation...
Background: Global warming poses significant challenges to aquaculture, as elevated water temperatures adversely affect fish health and survival. This study investigated the effects potential mechanisms of dietary tea polyphenols (TPs) on acute heat stress survival in hybrid crucian carp HCC2. Methods: The control (CON) group (HS group, three replicates, each containing 20 fish, n = 60 per group) were fed diets with 0 mg/kg TPs, experimental groups (HSLTP, HSMTP, HSHTP, × 3 replicates) 100,...
In order to better understand the interface bonding behavior of linear friction welding (LFW) a near-β titanium alloy, thermo-physical simulation for deformation and microstructure evolution TB2 alloy was carried out by using hot compression tests with specially designed hat-shaped specimens under different displacements, temperatures strain rates which were decoupled in process. The results show that peak shear stress zone (BZ) during increases decreasing temperature increasing rate, width...
Mid-infrared images of the Seyfert 1 galaxy Mrk 279 obtained with ISO satellite are presented together results a one-year monitoring campaign 2.5-11.7 μm spectrum. Contemporaneous optical photometric and spectrophotometric observations also presented. The appears as point-like source at resolution ISOCAM instrument (4-5″). average spectrum nucleus in shows strong power law continuum () weak PAH emission features. spectral energy distribution mid-IR bump, which extends from 2 to 15-20 μm....
Linear friction welding (LFW) has become a key manufacture and repair technology in the aeronautical engine manufacturing, especially blisk manufacturing. The kinematic equation during LFW was built, based on which heat whole process computed. With thermal- mechanical coupling technique, considering geometrical non-linearity, material property non-linearity interface frictional Finite Element Model (FEM) of temperature, stress deformation fields were constructed. distribution contour plastic...
Linear friction welding (LFW) of dissimilar near‐alpha TA19 (Ti–6Al–2Mo–4Zr–2Sn) to near‐beta TB2 (Ti–5Mo–5V–8Cr–3Al) titanium alloys is conducted with two preset axial shortenings further explore the bonding mechanism LFW. The microstructure evolution joints analyzed by using an optical microscope, scanning electron and transmission microscope. tensile properties Vickers hardness are tested. results show that there obvious differences in macro‐ characteristics on both sides joint resulting...