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Your search keyword '"Zhong, Yuan-hong"' showing total 11 results
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11 results on '"Zhong, Yuan-hong"'

7. Gravitational Radiation of Binaries Coalescence into Intermediate Mass Black Holes

Author

Li Jin, Pan Yu, and Zhong Yuan-hong

Subjects
Physics, Black hole, General Relativity and Quantum Cosmology, Numerical relativity, Physics and Astronomy (miscellaneous), Binary black hole, Computer Science::Sound, Intermediate-mass black hole, Waveform, Stellar black hole, Astrophysics, Spin-flip, Hawking radiation
Abstract

This paper discusses the gravitation waveforms of binaries coalescence into intermediate mass black holes (about 30 times of the solar mass). We focus on the non-spinning intermediate mass black hole located less than 100 Mpc from earth. By comparing two simulation waveforms (effective one body numerical relativity waveform (EOBNR), phenomenological waveform), we discuss the relationship between the effective distance and frequency; and through analyzing large amounts of data in event, we find that the phenomenological waveform is much smoother than EOBNR waveform, and has higher accuracy at the same effective distance.

Published
2012

9. Relic Gravity Waves Investigation by Advanced Space-Based Gravitational Waves Detector

Author

Zhong Yuan-hong, Zhong Tao, and Li Jin

Subjects
Physics, Inflation (cosmology), Physics and Astronomy (miscellaneous), Gravitational wave, Detector, Phase (waves), Spectral density, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Space (mathematics), Exponential function, General Relativity and Quantum Cosmology, symbols.namesake, symbols, Hubble's law
Abstract

This paper focuses on the relic gravity waves produced during the transition from a radiation-dominated inflationary phase to a dust-dominated Friedman–Robertson–Walker-type expansion. We discuss how to investigate the spectral energy density by the latest space-based GWs detectors at f = 0.1 Hz (i.e. DECIGO). In the case of power-law and exponential inflation, we apply the cross-correlation method to the latest detector and get the time dependence of the very early Hubble parameter.

Published
2010

11. [Adsorption of methylene blue onto vanadium-doped magnetite].

Author

Zhong YH, Liang XL, Zhu JX, He HP, and Yuan P

Subjects
Adsorption, Ferrosoferric Oxide chemistry, Methylene Blue isolation & purification, Vanadium chemistry, Waste Disposal, Fluid methods, Water Pollutants, Chemical isolation & purification
Abstract

A series of vanadium-doped magnetite (Fe3-x VxO4, x < 0.4) synthesized by an oxidation-precipitation method, were characterized using chemical analysis, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), as well as thermogravimetric and differential scanning calorimetry (TG-DSC) analyses. The obtained results show that the synthetic Fe3-x VxO4 has spinel structure while vanadium mostly replaces Fe3+ in the octahedral sites. The synthetic Fe3-x VxO4 is magnetic material, with crystal size ranging from 28 to 35 nm. The substitution of vanadium in the magnetite structure increases the amount of surface hydroxyls. The experimental adsorption results indicate that, in neutral pH condition, the maximum adsorption capacities of Fe3-x VxO4 increase obviously with the increase of vanadium concentration in magnetite while the adsorption isotherm complies well with the Langmuir model. The adsorption of methylene blue (MB) on Fe3-x VxO4 can get equilibrium in the first 25 min, supporting a pseudo-second order equation. Moreover, the rise of the solution pH value results in an increase of the adsorption capability of MB on Fe3-x VxO4.

Published
2010

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