A5100402626- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Planetary Science and Exploration
- Quantum chaos and dynamical systems
- Astrophysics and Star Formation Studies
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Geomagnetism and Paleomagnetism Studies
- Spacecraft Dynamics and Control
- Solar and Space Plasma Dynamics
- Chaos control and synchronization
- Geology and Paleoclimatology Research
- Digital Holography and Microscopy
- Fiscal Policy and Economic Growth
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Quantum optics and atomic interactions
- Mathematical Dynamics and Fractals
- Nuclear physics research studies
- Economic Growth and Productivity
- Photorefractive and Nonlinear Optics
- Galaxies: Formation, Evolution, Phenomena
- Nonlinear Dynamics and Pattern Formation
Nanjing University
2014-2024
Collaborative Innovation Center of Advanced Microstructures
2024
National Laboratory of Solid State Microstructures
2024
Heilongjiang Institute of Technology
2024
Harbin Institute of Technology
2022-2024
GTx (United States)
2024
Xinjiang Astronomical Observatory
2023
China Aerospace Science and Technology Corporation
2023
Shanghai Micro Satellite Engineering Center
2022
Simon Fraser University
2022
Abstract Aim Mesenteric hypertrophy has been recognized as an indicator of the complicated course Crohn's disease. The aim this study was to investigate whether visceral fat area ( VFA ) is associated with postoperative clinical and endoscopic recurrence. Method Computed tomography used measure subcutaneous , mesenteric index MFI defined ratio area. Associations between body mass index, area, recurrence were investigated. Results factors at 6 months after surgery a high value P = 0.019)...
Abstract Quantitative phase imaging (QPI) based on the transport-of-intensity equation (TIE) is a powerful technique in label-free microscopy. The image stack required for successful TIE-QPI traditionally obtained by translating object or plane, and optical elements used conventional systems are usually bulky cumbersome. Stable compact methods capable of non-motion zooming can significantly facilitate applications that demand portability. Here, we propose method dispersive metalens. nature...
Context. More than 10000 Jupiter Trojans have been detected so far. They are moving around the L4 and L5 triangular Lagrangian points of Sun-Jupiter system their distributions can provide important clues to early evolution Solar System. Aims. The number asymmetry is a longstanding problem. We aim test new mechanism in order explain this anomalous feature by invoking jumping-Jupiter scenario. Methods. First, we introduce orbital caused giant planet instability In scenario, could undergo an...
Motivated by the work [K. Karami, J. Fehri, {{\it Phys. Lett. B}} {\bf 684}, 61 (2010)] and [A. Sheykhi, 681}, 205 (2009)], we generalize their to new holographic dark energy model with $\rho_D=\frac{3\phi^2}{4\omega}(\mu H^2+\nu\dot{H})$ in framework of Brans-Dicke cosmology. Concretely, study correspondence between quintessence, tachyon, K-essence, dilaton scalar field Chaplygin gas non-flat universe. Furthermore, reconstruct potentials dynamics for these models. By analysis can show that...
The dynamics of the high-inclination Plutinos is systematically studied. We first present peculiar features 2:3 Neptune mean motion resonance (NMMR) for inclined orbits, especially correlation resonant amplitude A_{\sigma} with inclination i. Using numerical integrations age Solar system, dynamical structure NMMR mapped out on plane semi-major axis versus i different eccentricities. have shown that stable orbits could be as high 90 deg; and region roughly surrounded by contours = 120 deg....
The only discovery of Earth Trojan 2010 TK 7 and the subsequent launch OSIRIS-REx have motived us to investigate stability around triangular Lagrange points Earth, L 4 5 . In this paper we present detailed dynamical maps on ( a 0 , i ) plane with spectral number (SN) indicating stability. Two main regions, separated by chaotic region arising from ν 3 secular resonances, are found at low ≤ 15°) moderate (24 ° 37°) inclinations, respectively. most stable orbits reside below = 10° they can...
Compared with fractional-order chaotic systems a large number of dimensions, three-dimensional or integer-order exhibit low complexity. In this paper, two novel four-dimensional, continuous, fractional-order, autonomous, and dissipative system models higher complexity are revised. Numerical simulation the was used to verify that new very rich dynamic behavior. Moreover, synchronization method for is also an issue demands attention. order apply Lyapunov stability theory, it often necessary...
Topological pumps reveal topological insights of adiabatic mode evolution, in which adiabaticity plays a crucial role. However, the infimum, i.e., possible shortest evolution duration an pumping process, has remained elusive. In this study, we report approach infimum photonic waveguides based on lithium niobate-on-insulator (LNOI) platform. Besides most common way to achieve by slowing down system, pump is also contingent effective Berry connection between instant eigenstates, can be...
As the second part of our study, in this paper, we proceed to explore dynamics high-inclination Twotinos 1:2 Neptune mean motion resonance (NMMR). Depending on inclination i, show existence two critical eccentricities ea(i) and ec(i), which are lower limits eccentricity e for resonant angle σ exhibit libration asymmetric libration, respectively. Accordingly, have determined centres σ0 inclined orbits, strongly dependent i. With initial = a fine grid (e, i), stability orbits NMMR is probed by...
Abstract Rotation periods of 53 small (diameters 2 km < D 40 km) Jupiter Trojans (JTs) were derived using the high-cadence lightcurves obtained by FOSSIL phase I survey, a Subaru/Hyper Suprime-Cam intensive program. These are first reported measured for JTs with 10 km. We found lower limit rotation period near 4 hr, instead previously published result 5 hr larger JTs. Assuming rubble-pile structure JTs, bulk density ≈0.9 g cm −3 is required to withstand this spin rate limit, consistent...
Most recently, machine learning has been used to study the dynamics of integrable Hamiltonian systems and chaotic 3-body problem. In this work, we consider an intermediate case regular motion in a non-integrable system: behaviour objects 2:3 mean resonance with Neptune. We show that, given initial data from short 6250 yr numerical integration, best-trained artificial neural network (ANN) can predict trajectories resonators over subsequent 18750 evolution, covering full libration cycle...
Abstract Secular dynamics inside mean motion resonances (MMRs) plays an essential role in governing the dynamical structure of trans-Neptunian region and sculpting orbital distribution objects (TNOs). In this study, semianalytical developments are made to explore von Zeipel–Lidov–Kozai resonance MMRs. To end, a semi-secular model is formulated from averaging theory then single-degree-of-freedom integrable achieved based on adiabatic invariance approximation. particular, we introduce modified...
Aim. We construct a new arc model to represent the global perturbation induced by Jupiter Trojans for development of modern planetary ephemerides. Methods. The are divided into two groups: (1) 226 biggest ones with absolute magnitudes $H<11$, have well determined masses and treated as individual bodies; (2) remaining small $H\geqslant11$, modeled discrete arcs centered at Jupiter's L4 L5 points, respectively. Then we derived parameters characterizing arcs, such total mass, mass ratio,...
The population of Neptune Trojans is believed to be bigger than that Jupiter and asteroids in the main belt, although only eight members this far distant asteroid swarm have been observed up now. Six leading around Lagrange point L4 discovered earlier studied detail, but two trailing ones found recently L5 point, 2004 KV18 2008 LC18, not investigated yet. In paper, we report our investigations on dynamical behaviors these new Trojans. Our calculations show a temporary Trojan. Most probably,...
We aim to locate the stability region for Uranus Trojans (UT hereafter) and find out dynamical mechanisms responsible structures in phase space. Using spectral number as indicator, we construct maps on (a0, i0) plane. The proper frequencies of UTs are determined precisely so that can depict resonance web via a semi-analytical method. Two main regions found, one each low-inclination (0-14deg) high-inclination regime (32-59deg). There is also an instability strip them, at 9deg 51deg...
Aims.We explore the formation and evolution of highly inclined orbit Neptune Trojan 2005 TN53.
Aims. We explore the orbital evolution of four Jovian planets embedded in a self-gravitating planetesimal disk, along with simultaneous accretion small bodies by proto-Uranus and proto-Neptune.
The high-inclination population in the 4:7 mean motion resonance (MMR) with Neptune has also substantial eccentricities ($e\gtrsim0.1$), more inclined objects tending to occupy eccentric orbits. For this high-order resonance, there are two different resonant modes. principal one is eccentricity-type mode, and we find that libration permissible for orbits $e\ge e_c^0$, where critical eccentricity $e_c^0$ increases as a function of increasing inclination $i$. Correspondingly, introduce...
In this work, two multi-harmonic Hamiltonian models for mean motion resonances are formulated and their applications to first-order discussed. For the $k_p$:$k$ resonance, usual critical argument $φ= k λ- k_p λ_p + (k_p - k) \varpi$ is taken as resonant angle in first model, while second model characterized by a new $σ= φ/ k_p$. Based on canonical transformations, Hamiltonians associated with these formulated. It found that holds advantages comparison model: (a) providing direct...
We aim to determine the relative angle between total angular momentum of minor planets and that Sun-planets system, improve orientation invariable plane solar system. By utilizing physical parameters available in public domain archives, we assigned reasonable masses 718041 throughout including near-Earth objects, main belt asteroids, Jupiter trojans, trans-Neptunian scattered-disk centaurs. Then combined orbital data calibrate momenta these small bodies, evaluated specific contribution...