A5017984078- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Geophysics and Sensor Technology
- Inertial Sensor and Navigation
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- Earthquake Detection and Analysis
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Geomagnetism and Paleomagnetism Studies
- Diet and metabolism studies
- Magnetic confinement fusion research
- Solar and Space Plasma Dynamics
- Gut microbiota and health
- Space Satellite Systems and Control
- Astrophysics and Cosmic Phenomena
- Statistical and numerical algorithms
- Space exploration and regulation
- Astro and Planetary Science
- Trauma Management and Diagnosis
- Advanced Measurement and Metrology Techniques
- Ionosphere and magnetosphere dynamics
- Spacecraft Design and Technology
- Astronomical Observations and Instrumentation
- Diverse Aspects of Tourism Research
National Space Science Center
2021-2025
Chinese Academy of Sciences
2015-2025
Ningde Normal University
2024
Hong Kong Baptist University
2023
Beijing Normal University - Hong Kong Baptist University United International College
2023
Beijing Normal University
2023
Guangxi University
2022
Beijing Aerospace Flight Control Center
2015-2017
Academy of Mathematics and Systems Science
2015-2017
Beihang University
2017
Abstract In this perspective, we outline that a space borne gravitational wave detector network combining LISA and Taiji can be used to measure the Hubble constant with an uncertainty less than 0.5% in ten years, compared of ground based detectors which within 2% next five years by standard siren method. is Chinese detection mission planned for launch early 2030 s. The pilot satellite Taiji-1 has been launched August 2019 verify feasibility Taiji. results few technologies tested on are...
The present work reports on a feasibility study commissioned by the Chinese Academy of Sciences China to explore various possible mission options detect gravitational waves in space alternative that eLISA/LISA concept. Based relative merits assigned science and technological viability, few representative descoped from ALIA are considered. A semi-analytic Monte Carlo simulation is carried out understand cosmic black hole merger histories starting intermediate mass holes at high redshift as...
Abstract Childhood obesity not only has a negative impact on child's health but is also significant risk factor for adult and related metabolic disorders, making it major global public concern. Recent studies have revealed the crucial role of gut microbiota in occurrence development obesity, addition to genetic lifestyle factors. In this study, we recruited 19 normal-weight children 47 with varying degrees obesity. A questionnaire survey was conducted inquire about family background, habits...
The Taiji project is a space gravitational-wave detection mission consisting of three satellites that form giant equilateral triangle with side length approximately $3\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }\mathrm{km}$ in the heliocentric orbit. target to detect signals 0.1 mHz 1 Hz band. However, its intersatellite distances are affected by celestial bodies solar system, introducing changes may reach levels 30,000 km magnitude. Thus, it important investigate whether...
For controlling the beat frequency of heterodyne interferometry so that Taiji program can detect gravitational waves in space, an offset setting strategy based on a linear programming algorithm is proposed. Considering factors such as Doppler shift, phase-locking scheme, laser relative intensity noise, and phase detector bandwidth, inter-spacecraft results suitable for are obtained. During six years running detection process, use bounds range [5 MHz, 25 MHz] showed frequencies will remain...
This article investigates the influencing factors of China's outward foreign direct investment (OFDI) in RCEP countries across quantiles. We apply a panel quantile regression to seek that influence OFDI with most and least from China. Our findings are outlined as follows. First, have significant heterogeneity More specifically, trade exports (EXP) strongest positive impact on promoting countries, occurs less OFDI. Second, The higher level political stability (HP) more OFDI, they attract,...
Magnetic disturbance, originating arising from the interaction between environmental magnetic field and test mass (TM) properties, is a significant source of high-precision inertial sensor noise in space-borne gravitational wave detection missions, which puts forward an extremely stringent requirement on TM cleanliness. Therefore, torsion pendulum for on-ground testing required to characterize properties TM. We report improved measurement scheme using with electrostatically controlled block....
The mystery of the asteroid (4179) Toutatis was revealed by Chang'e-2 spacecraft during a close flyby on December 13, 2012. Optical imaging and navigation probe were performed entirely under ground-based radio tracking default sequence built ground. This paper establishes set estimation algorithms relative trajectory between based dynamics, optical, constraints that are determined unique mode. study is first time to precisely reproduce core process Chang'e-2's encounter with several optical...
Taiji-1 is the first technology demonstration satellite of Taiji Program in Space, which, served as pre-PathFinder mission, had finished its nominal science operational phase and successfully accomplished mission goal. The gravitational reference sensor (GRS) on-board one key payloads that coupled strongly to other instruments, sub-systems also platform itself. Fluctuations physical environment inside mechanical disturbances generate important noises GRS measurements, therefore their data...
With the Gravity Recovery and Climate Experiment (GRACE) mission as prime example, an overview is given on management processing of Level 1A data a low–low satellite to tracking mission. To illustrate underlying principle algorithm, detailed study made K-band ranging (KBR) assembly, which includes measurement principles, modeling noises, generation from that 0 well 1B processing.
Two way ranging data for spacecraft tracking of China's first Martian mission Tianwen-I is analysed. Shortly before the entered Mars parking orbit, two coherent microwave link between and Earth resembles a long arm gravitational wave interferometer, with both regarded as in an approximate free falling state. By carefully selecting analysing segments time series during this span, parametric statistical model built upper limit stochastic waves background (SGWB) then estimated within frequency...
In the detection of gravitational waves in space, during science phase mission, point ahead angle mechanism (PAAM) serves to steer a laser beam compensate for generated by relative motion two spacecrafts (SCs) approximately 10 seconds flight time will take from one SC reach distant three million kilometers away. The common practice pointing stability control is first do coarse tracking PAAM between SCs, be followed fine control. present work, exploiting near-circular orbit structure...
The prevalence of childhood obesity is rising globally, with some obese children progressing to develop metabolic syndrome (MS). However, the specific differences between these groups remain unclear. To investigate in gut microbiota, we conducted physiological and biochemical assessments, alongside 16S rRNA sequencing, a cohort 32 from Southeastern China, which included 4 normal-weight children, 5 mild obesity, 9 moderate severe syndrome. Our results indicated that waist circumference, serum...
In the centenary year of Einstein's General Theory Relativity, this paper reviews current status gravitational wave astronomy across a spectrum which stretches from attohertz to kilohertz frequencies. Sect. 1 historical development first prediction our understanding spectrum. It is shown that detection signals in audio frequency can be expected very soon, and north-south pair next generation detectors would provide large scientific benefits. 2 theory waves principles using laser...
Part of a review paper entitled "Gravitational wave astronomy: the current status.", appeared in " Science China Physics, Mechanics & Astronomy 58.12 (2015): 1-41.
This paper proposes a new optical hybrid navigation method for use in close flybys of small celestial bodies. Two steps are taken to estimate the inertial position and attitude spacecraft: 1) The relative motion between spacecraft center mass body is determined by processing images from onboard monocular camera using photogrammetric technique. 2) absolute state establishing an accurate displacement increment equation, which based on various constraints integrates both radiometric...
More and more families choose to buy the second-hand houses as their first house. Due a high demand in housing market, there is continuously rising trend price of houses. This article mainly focus on valuation Chinese based binomial option pricing model. Besides valuing American-style options, time value another important element Based defined model, result empirical analysis that estimation current has difference from actual transaction prices some extent. It can be concluded market far...