A5100425491- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Lightning and Electromagnetic Phenomena
- Astrophysical Phenomena and Observations
- Electromagnetic Compatibility and Noise Suppression
- Advanced Vision and Imaging
- Gamma-ray bursts and supernovae
- Mobile Agent-Based Network Management
- Image and Signal Denoising Methods
- Fire dynamics and safety research
- Mathematical Dynamics and Fractals
- Neural Networks and Applications
- Combustion and Detonation Processes
- Algorithms and Data Compression
- Blind Source Separation Techniques
- Advanced Image Processing Techniques
- Quantum chaos and dynamical systems
- Electromagnetic Compatibility and Measurements
- Cognitive Computing and Networks
Shandong University
2007-2022
Qufu Normal University
2014
Institute of Theoretical Physics
2012
Nanjing Normal University
2009-2012
It is found that \feii emission contributes significantly to the optical and ultraviolet spectra of most active galactic nuclei. The origin optical/UV still a question open debate. variability would give clues this origin. Using 7.5 yr spectroscopic monitoring data one Palomer-Green (PG) quasi-stellar object (QSO), PG 1700+518, with strong emission, we obtain light curves continuum \lv, \feii, broad component \hb, narrow \hb by spectral decomposition. Through interpolation cross-correlation...
For some samples, it has been shown that spectra of QSOs with low redshift are bluer during their brighter phases. the FIRST bright QSO sample, we assemble from SDSS DR7 to investigate variability between White et al. (2000) and for a long rest-frame time-lag, up 10 years. There 312 radio loud 232 quiet in this $z \sim 3.5$. With two-epoch variation, is found half appear redder no obvious difference slope sub-samples QSOs. This result implies presence jet does not affect on 10-year...
Asymmetric X-ray emission and powerful cluster-scale radio halo indicate that A2319 is a merging cluster of galaxies. This paper presents our multicolor photometry for with 15 optical intermediate filters in the Beijing-Arizona-Taiwan-Connecticut (BATC) system. There are 142 galaxies known spectroscopic redshifts within viewing field, including 128 member (called sample I).A large velocity dispersion rest frame suggests merger dynamics A2319. The contour map projected density localized...
An optical photometric observation in 15 bands was carried out for nearby galaxy cluster Abell 1775 by the Beijing-Arizona-Taiwan-Connecticut (BATC) multi-color system. Over 5000 sources' spectral energy distributions (SEDs) were obtained. Since this has also been observed Sloan Digital Sky Survey (SDSS), BATC SEDs combined with SDSS five-band data. Using SEDs, 146 faint galaxies selected as new member redshift technique. Based on positions, redshifts and 20-band of galaxies, dynamical...
With the increasing construction of high-voltage substation, distance between resident area and substation is getting closer. Noise substations has been an unavoidable problem which can be controlled better by analyzing it. Otherwise, operational conditions equipment in predicted comparing measured noise signals with during normal operation. Corona emitted high voltage transmission line, environmental quasi-stationary noumenon generated electric appliances are three main types can't...
An optical photometric observation with the Beijing-Arizona-Taiwan-Connecticut (BATC) multicolor system is carried out for A98 (z = 0.104), a galaxy cluster two large enhancements in X-ray surface brightness. Spectral energy distributions (SEDs) covering 15 intermediate bands are obtained all sources detected down to V ∼ 20 mag field of 58' × 58'. After star-galaxy separation color-color diagrams, redshift technique applied sample further membership determination. The color-magnitude...
To solve the problem that high-redshift and broad emission lines weaken quasar discovery observation severely, a new redshift calculation method based on piecewise Gaussian fitting is proposed. The denoised normalized spectrum divided into two regions, peak non-peak, by mean square error threshold segmentation first. Then, non-peak region applied to fit continuous spectrum, removal of which gains access residual spectrum. And, each segment in precisely fitted single-peak replace original...
At present, PVC and balsa wood are usually adopted in the sandwich structure of wind turbine blade. However, comparative research on damage characteristics two materials under lightning arc was seldom reported. In this paper, firstly large current impact experiment carried out to simulate thermal effect arc, results showed that with increase amplitude, there an apparent reduction residual strength wood, fell faster. Secondly, molecular reaction dynamics used paper analyze chemical process...
Due to the non-flat amplitude-frequency characteristics of antennas used in EMC measurement, measuring results can not accurately present real levels radiations. So, transfer functions for frequency-domain compensation antennas, should be adopted rectify radiations levels. Vector fitting is a popular iterative rational approximation technique function frequency domain. In this paper, an improved methodology introduced, which improves calculation accuracy and reduces influence condition number.