Jian hua Hu

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We investigate the correlation between the supermassive black holes (SMBHs) mass (M bh) and the stellar velocity dispersion (σ *) in two types of host galaxies: the early-type bulges (disk galaxies with classical bulges or elliptical galaxies) and pseudobulges. In the form log(M bh /M) = α + β log(σ * /200 km s −1), the best-fit results for the 39(More)
Cadmium (Cd) isotopes provide new insights into Cd uptake, transport and storage mechanisms in plants. Therefore, the present study adopted the Cd-tolerant Ricinus communis and Cd-hyperaccumulator Solanum nigrum, which were cultured under controlled conditions in a nutrient solution with variable Cd supply, to test the isotopic fractionation of Cd during(More)
Particulate pollution from anthropogenic and natural sources is a severe problem in China. Sulfur and oxygen isotopes of aerosol sulfate (δ(34)Ssulfate and δ(18)Osulfate) and water-soluble ions in aerosols collected from 2012 to 2014 in Beijing are being utilized to identify their sources and assess seasonal trends. The mean δ(34)S value of aerosol sulfate(More)
Several thousand Reticulitermes flavipes (Kollar) including worker, nymph, soldier, neotenic and alate castes were collected from three pine logs brought into the laboratory on dates five years apart. The neotenics, all nymphoid, were divided into three groups based on the extent of cuticle pigmentation and termed regular neotenics (RN), black-headed(More)
  • Christian Wortmann, W H Teukolsky, W T Flannery, Numeri, Yong, J H Hu +1 other
  • 2006
The paper is concerned with the problem of approximating a spatial polygonal curve P by a G 1-curve composed of line and arc segments, commonly known as arc spline, circular spline or circular spline curve, respectively. The number of arc segments should be small compared to the number of segments of P , and the deviation between the two curves has to be(More)
Given a large-scale mixture of self-interacting dark matter (SIDM) particles and baryon matter distributed in the early Universe, we advance here a two-phase accretion scenario for forming supermassive black holes (SMBHs) with masses around ∼ 10 9 M ⊙ at high redshifts z (> ∼ 6). The first phase is conceived to involve a rapid quasi-spherical and(More)
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