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An accurate determination of the Hubble constant from baryon acoustic oscillation datasets

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Science China(Physics,Mechanics & Astronomy) 2015年第9期58卷 103-108页

作者： CHENG Cheng huang qingguo State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences University of the Chinese Academy of Sciences

Even though the Hubble constant cannot be significantly determined just by the low-redshift Baryon Acoustic Oscillation(BAO)data, it can be tightly constrained once the high-redshift BAO data are combined. We combined BAO data from 6d FGS, BOSS DR11 clustering of galaxies, Wiggle Z and z = 2.34 from BOSS DR11 quasar Lyman-α forest lines to get H0= 68.17+1.55-1.56 km s-1Mpc-1. In addition, we adopted the simultaneous measurements of H(z) and DA(z) from the two-dimensional two-point correlation function from BOSS DR9 CMASS sample and two-dimensional matter power spectrum from SDSS DR7 sample to obtain H0=(68.11±1.69) km s-1Mpc-1. Finally, combining all of the BAO datasets, we conclude that H0=(68.11±0.86) km s-1Mpc-1, a1.3% determination.

关键词： Hubble constant baryon acoustic oscillation large-scale structure

Constraints on the extensions to the base ΛCDM model from BICEP2, Planck and WMAP

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Science China(Physics,Mechanics & Astronomy) 2014年第8期57卷 1460-1465页

作者： CHENG Cheng huang qingguo ZHAO Wen State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences University of the Chinese Academy of Sciences Key Laboratory for Researches in Galaxies and Cosmology Department of Astronomy University of Science and Technology of China

Recently Background Imaging of Cosmic Extragalactic Polarization （B2） discovered the relic gravitational waves at 7.00- confi- dence level. However, the other cosmic microwave background （CMB） data, for example Planck data released in 2013 （P13）, prefer a much smaller amplitude of the primordial gravitational waves spectrum if a power-law spectrum of adiabatic scalar perturbations is assumed in the six-parameter ACDM cosmology. In this paper, we explore whether the wCDM model and the running spectral index can relax the tension between B2 and other CMB data. Specifically we found that a positive running of running of spectral index is preferred at 1.70- level from the combination of B2, P 13 and WMAP Polarization data.

关键词： relic gravitational waves spectral index dark energy

Removal of 17β-estradiol in laccase catalyzed treatment processes

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 372-378页

作者： Qing XIA Deyang KONG Guoqiang LIU qingguo huang Aamr ALALEWI Junhe LU Department of Environmental Science and Engineering Nanjing Agricultural University Nanjing 210095 China Nanjing Institute of Environmental Sciences Ministry of Environmental Protection Nanjing 210042 China Department of Crop and Soil Sciences University of Georgia Griffin GA 30223 USA

The removal of 17β-estradiol （E2） in laccase catalyzed oxidative coupling processes was systematically studied in this work. We focused on the influence of pH and natural organic matter （NOM） on the performance of the enzymatic treatment processes. It was found that the optimal pH for E2 removal was between 4 and 6. The removal of E2 was slightly inhibited in the presence of NOM. Enzymatic transformation of E2 was second-order in kinetics with first-order to both the concentrations of the enzyme and contaminant. Mass spectrum （MS） analysis suggested that coupling products were formed through radical-radical coupling mechanism. The results of this study demonstrated that laccase catalyzed oxidative coupling process could potentially serve as a treatment strategy to control steroid estrogens.

关键词： 17β-estradiol laccase oxidative coupling processes kinetics mechanisms

Testing modified gravity models with recent cosmological observations

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2244-2258页

作者： ZHANG WenShuai CHENG Cheng huang qingguo LI Miao LI Song LI XiaoDong WANG Shuang Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Kavli Institute for Theoretical Physics China Chinese Academy of SciencesBeijing 100190China State Key Laboratory of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Interdisciplinary Center for Theoretical Study University of Science and Technology of ChinaHefei 230026China

We explore the cosmological implications of five modified gravity(MG) models by using the recent cosmological observational data,including the recently released SNLS3 type Ia supernovae sample,the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations,the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7,and the latest Hubble constant measurement utilizing the Wide Field Camera 3 on the Hubble Space *** MG models considered include the Dvali-Gabadadze-Porrati(DGP) model,two f(R) models,and two f(T) *** find that compared with the ΛCDM model,MG models can not lead to an appreciable reduction of the χ 2 *** analysis of AIC and BIC shows that the simplest cosmological constant model(ΛCDM) is still the most preferred by the current data,and the DGP model is strongly *** addition,from the observational constraints,we also reconstruct the evolutions of the growth factor in these *** find that the current available growth factor data are not enough to distinguish these MG models from the ΛCDM model.

关键词： modified gravity cosmic acceleration dark energy experiment growth factor

Quantitative structure－activity study on the reductive dehalogenation potency of the halogenated aromatics

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Journal of Environmental Sciences 1995年第2期7卷 183-189页

作者： huang qingguo Wang Liansheng Han Shuokui(Department of Environmental Science and Technology, Nanjing University , Nanjing 210008 , China) Dept of Envmlt Sci & Tech Nanjing Univ Nanjing China

Ｑｕａｎｔｉｔａｔｉｖｅｓｔｒｕｃｔｕｒｅ－ａｃｔｉｖｉｔｙｓｔｕｄｙｏｎｔｈｅｒｅｄｕｃｔｉｖｅｄｅｈａｌｏｇｅｎａｔｉｏｎｐｏｔｅｎｃｙｏｆｔｈｅｈａｌｏｇｅｎａｔｅｄａｒｏｍａｔｉｃｓＨｕａｎｇＱｉｎｇｇｕｏ；... 详细信息

Ｑｕａｎｔｉｔａｔｉｖｅｓｔｒｕｃｔｕｒｅ－ａｃｔｉｖｉｔｙｓｔｕｄｙｏｎｔｈｅｒｅｄｕｃｔｉｖｅｄｅｈａｌｏｇｅｎａｔｉｏｎｐｏｔｅｎｃｙｏｆｔｈｅｈａｌｏｇｅｎａｔｅｄａｒｏｍａｔｉｃｓＨｕａｎｇＱｉｎｇｇｕｏ；ＷａｎｇＬｉａｎｓｈｅｎｇ；Ｈａｎ...

关键词： quantitative structure - activity relationship(QSAR) halogenated arornatics dehalogenation poten-cy discriminant function.

Dark energy and fate of the Universe

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Science China(Physics,Mechanics & Astronomy) 2012年第7期55卷 1330-1334页

作者： LI XiaoDong WANG Shuang huang qingguo ZHANG Xin LI Miao Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Key Laboratory of Frontiers in Theoretical Physics Chinese Academy of SciencesBeijing 100190China Department of Physics College of SciencesNortheastern UniversityShenyang 110004China Center for High Energy Physics Peking UniversityBeijing 100080China

We explore the ultimate fate of the Universe by using a divergence-free parametrization for dark energy w（z）=w0＋wa, [In（2 ＋ z） / （1 ＋ z） - In 2] . Unlike the Chevallier-Polarski-Linder parametrization, this parametrization has well behaved, bounded behavior for both high redshifts and negative redshifts, and thus can genuinely cover many theoretical dark energy models. Alter constraining the parameter space of this parametrization by using the current cosmological observations, we find that, at the 95.4% confidence level, our Universe can still exist at least 16.7 Gyr before it ends in a big rip. Moreover, for the phantom energy dominated Universe, we find that a gravitationally bound system will be destroyed at a time t = P√2｜ 1 ＋ 3w（ 1）] / [6π] 1 ＋ w（-1）｜], where P is the period of a circular orbit around this system, before the big rip.

关键词： dark energy dynamical evolution fate of the Universe

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是什么驱动宇宙暴胀?

科学通报 2017年第36期62卷 4216-4219页

作者：黄庆国中国科学院理论物理研究所

尽管热大爆炸宇宙学取得了巨大的成功,它所预言的轻元素丰度以及宇宙微波背景辐射等都得到了大量观测的支持,但是热大爆炸宇宙学依然面临诸如平坦性和视界等无法克服的疑难问题.在热大爆炸之前,宇宙历经暴胀,在极短时间内膨胀了极大的倍... 详细信息

尽管热大爆炸宇宙学取得了巨大的成功,它所预言的轻元素丰度以及宇宙微波背景辐射等都得到了大量观测的支持,但是热大爆炸宇宙学依然面临诸如平坦性和视界等无法克服的疑难问题.在热大爆炸之前,宇宙历经暴胀,在极短时间内膨胀了极大的倍数,抹匀了宇宙初期的不均性和拉平了宇宙空间几何,从而简单合理地解决了热大爆炸宇宙学面临的诸多疑难问题.并且,起源于暴胀时期的量子涨落可以自然地提供导致形成宇宙大尺度结构和微波背景辐射各向异性的原初密度涨落.目前被广泛接受的图像是:暴胀由标量场(也被称为暴胀子)的一段较为平缓的势能驱动,期间暴胀子的动能远小于它的势能.然而,暴胀子的物理起源依然不清楚,需要通过未来更多的理论研究和观测来揭示宇宙暴胀的机制.

关键词：暴胀量子涨落大爆炸宇宙学宇宙微波背景辐射

Genotoxicity　of　substituted　nitrobenzenes　and　the　quantitative　structure－activity　relationship

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Journal of Environmental Sciences 1996年第1期8卷 103-109页

作者： huang qingguo Liu Yongbin Wang Liansheng Han Shuokui(Department of Environmental Science and Engineering,Nanjing University,Nanjing 210093,China)Yang Jun(Jiangsu Metallurgy Institute.Nanjing 210007,China)

The genotoxicity of 22 substituted nitrobenzenes were evaluated by the chromosome aberrations test in in vitro human peripheral lymphocytes.18 of 22 compounds exhibit genotoxic *** structure-activity relationship model was established to correlate the genotoxicity of substituted nitrobenzenes with the characteristics of the substituents on benzene ring.

关键词： quantitative structure-activity relationship(QSAR) substituted nitrobenzenes genotoxicity.

Composite of PAH-degrading endophytic bacteria reduces contamination and health risks caused by PAHs in vegetables

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Composite of PAH-degrading endophytic bacteria reduces conta...