Chuzhou, China

Chuzhou University
Chuzhou, China
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Huang A.,Chuzhou University
Journal of Computational and Theoretical Nanoscience | Year: 2016

Shot is always one of important Asian sports events, while Asian shot level also internationally attracts great attention. So as to vigorously carry forward Asian shot advantages and constantly get good results in international competitions, fuzzy clustering analysis is made targeted at Asian shot technical influence factors and main influence factors are found. Three main factors affect shot throwing distance are shot throwing height, angle and velocity, of which initial qualitative analysis is made. And then Asian shot putters' own characteristics as lower throwing height and smaller strength than that of Europeans and Americans are systematically analyzed. Regarding shot as a mass point, it is firstly supposed that landing point and throwing point are on the same horizontal line; utilize Newtonian mechanics and related physics knowledge to make force analysis of shot. By establishing above model, relevant reasonable suggestions is presented on how to enable shot putters to get good results in competitions, and technical guidance is then provided for the development of Asian shot. Copyright © 2016 American Scientific Publishers All rights reserved.

Xin L.,Chuzhou University
Journal of Chemical and Pharmaceutical Research | Year: 2014

Carbohydrate fatty acid esters are biodegradable, nontoxic and nonionic surfactants, their antimicrobial activity is herein reviewed. The regioselective synthesis of sugar esters with enzymatic and chemical method, especially tin-mediated method, is well described. The antimicrobial activity of these sugar esters, especially how carbohydrate hydrophilic cores, the length of fatty acid chain and the glycoconjugate linkage of sugar fatty acid esters affect their antimicrobial activity is described in detail. © 2014, Journal of Chemical and Pharmaceutical Research. All rights reserved.

Dai S.B.,Chuzhou University | Lu X.X.,National University of Singapore | Lu X.X.,Yunnan University of Finance and Economics
Geomorphology | Year: 2014

Extensive research into the changing sediment load throughout the Yangtze River (Changjiang) basin has been completed over recent years, and it provides an ongoing example of how to evaluate the consequences of natural and anthropogenic impacts on sediment processing in a very large fluvial system. This paper reviews these recent studies and critically assesses their findings regarding changes in sediment yield, load (both spatial and temporal variations), grain size, and rating curves, as well as the morphodynamic response of the channel and delta. We also discuss the factors driving these changes, including climate change, soil and water conservation measures, dam construction, and sand extraction, and consider the likely future trends in sediment load. Based on a consideration of the major outcomes of, and discrepancies between, recent studies, we conclude that sediment supply, transport, mobilization, and deposition in this large river system are complicated by the heterogeneous nature of its morphology and climate, as well as the progressive intensification of human activities. Therefore, the identification and interpretation of hydrological and sedimentological changes in the Yangtze basin can be difficult, and an in-depth study of the causal mechanisms of variations in sediment load and the impacts on the Yangtze River system is urgently required. © 2013 Elsevier B.V.

Zhao X.-F.,Chuzhou University | Jia H.-Y.,Southwest Jiaotong University
Physical Review C - Nuclear Physics | Year: 2012

We attempted to determine the possible models for the neutron star PSR J1614-2230 in the framework of the relativistic mean field theory considering the baryon octet. It was found that the maximum mass of the neutron star will increase as the x ω increases, with the x ρΛ,x ρΣ,x ρΞ, and the x σ being fixed. By successively adopting the approximate methods, we can obtain four of the possible models: (i) x σ=0.33 and x ω=0.6964, (ii) x σ=0.4 and x ω=0.7435, (iii) x σ=0.5 and x ω=0.8106, and (iv) x σ=0.6 and x ω=0.8772. Here, the hyperon coupling constants x ρ are x ρΛ=0, x ρΣ=2, x ρΞ=1, and the nucleon coupling constants are chosen as GL97. Further, the possible value range of x σ and x ω, which corresponds to the mass of the neutron star PSR J1614-2230, is also determined through the four values of hyperon coupling constants determined in this paper. Our results may prove that the hadronic theory model can describe the mass of the neutron star PSR J1614-2230. © 2012 American Physical Society.

Chen H.,Southwest Jiaotong University | Li T.,Southwest Jiaotong University | Ruan D.,Southwest Jiaotong University | Lin J.,Southwest Jiaotong University | Hu C.,Chuzhou University
IEEE Transactions on Knowledge and Data Engineering | Year: 2013

Approximations of a concept by a variable precision rough-set model (VPRS) usually vary under a dynamic information system environment. It is thus effective to carry out incremental updating approximations by utilizing previous data structures. This paper focuses on a new incremental method for updating approximations of VPRS while objects in the information system dynamically alter. It discusses properties of information granulation and approximations under the dynamic environment while objects in the universe evolve over time. The variation of an attribute's domain is also considered to perform incremental updating for approximations under VPRS. Finally, an extensive experimental evaluation validates the efficiency of the proposed method for dynamic maintenance of VPRS approximations. © 1989-2012 IEEE.

Lou X.,Chuzhou University
Asian Journal of Chemistry | Year: 2013

Regioselectivity of methyl α-D-glucopyranoside benzylation using dibutyltin dimethoxide (DBDM) as stannylating agent was probed, general factors affecting regioselectivity have been examined. The results show the O-2 position of glucoside has advantage of being benzylated over the O-6 position. The major isomers of benzyl ether were separated by preparative HPLC method and characterized.

Zhao X.-F.,Chuzhou University
Acta Physica Polonica B | Year: 2013

Based on the hadronic level, the value range of the surface gravitational redshift of the neutron star PSR J1614-2230 is tried to be determined in the framework of the relativistic mean field theory. It is found that for the neutron star PSR J1614-2230 the ratio of mass M and radius R is in the range of ∼ 0.1692 to 0.1958 and the surface gravitational redshift is in the range of ∼ 0.4138 to 0.5397. However, for a small mass neutron star, which is calculated with the hyperon coupling constant obtained by the constituent quark model [SU(6) symmetry], the ratio of mass M and radius R is 0.1221 and the surface gravitational redshift is 0.2507. The surface gravitational redshift of the neutron star PSR J1614-2230 is about one times larger than that of the small mass neutron star.

Zhao X.-F.,Chuzhou University
International Journal of Theoretical Physics | Year: 2011

A new set of nucleon coupling constants (CZ11) is obtained for the relativistic mean field (RMF) theory based on the recent experimental information on the symmetry energy derived from the data from NSCL/MSU. The surface gravitational redshift of a proto neutron star (PNS) is examined within the RMF framework for the baryon octet system by using this set of parameters. It is found that the surface gravitational redshift for CZ11 is smaller than that for GL97. For the CZ11 parameter set, the surface gravitational redshift of a PNS at T=15 MeV is smaller than that at T=0 MeV. It is also found that the surface gravitational redshift corresponding to Mmax/R for the CZ11 parameter set is smaller by about 10 percent than that for GL97, with Mmax being the maximum mass and R being the corresponding radius. © 2011 Springer Science+Business Media, LLC.

Zhao X.-F.,Chuzhou University
Chinese Physics B | Year: 2011

The effects of σ* and Φ mesons on the surface redshift of a neutron star have been investigated within the framework of relativistic mean field theory for the baryon octet {n, p, Λ, Σ-, Σ0, Σ+, Ξ-, Ξ0} system. It is found that compared with those without considering the contributions of σ* and Φ mesons, the surface redshift decreases and that corresponding to the maximum value of the mass also decreases from 0.2540 to 0.2236, about by 12%. Meanwhile, it is also found that including σ* and Φ mesons, the M/R and that corresponding to the maximum mass decrease. © 2011 Chinese Physical Society and IOP Publishing Ltd.

Zhao X.-F.,Chuzhou University
Astrophysics and Space Science | Year: 2011

The effect of the Σ-meson well depth on the gravitational redshift is examined within the framework of relativistic mean field theory for the baryon octet system. It is found that, for a stable neutron star, the gravitational redshift increases with the central energy density increase or with the mass increase but decreases as the radius increases. Considering a change of U(N) Σ from -30 MeV to 30 MeV, for a stable neutron star the gravitational redshift near to the maximum mass increases. In addition, it is also found that the growth of the U(N) Σ makes the gravitational redshift as a function of Mmax/R increase, the higher the U(N) Σ the less the change in the gravitational redshift. © 2010 Springer Science+Business Media B.V.

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