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Supercapacitors based on high-surface-area graphene

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Science China(Technological Sciences) 2014年第2期57卷 278-283页

作者： zhou xiaolin WANG Min LIAN Jie LIAN YongFu Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education School of Chemistry and Material Science Heilongjiang University

Exfoliated graphite oxide was prepared by an improved Hummers method and was then reduced to graphene with hydrazine in the presence of ammonium hydroxide.N2adsorption–desorption measurement showed that graphene so obtained had a specific surface area as high as 818 m2/*** charge/discharge curves demonstrated that the as-prepared graphene exhibited a specific capacitance of 186.9 F/g at a current density of 0.1 A/g and that about 96%of the specific capacitance was retained after 2000 cycles at a current density of 5 A/g.

关键词： supercapacitor graphene high specific surface area high specific capacitance

A first-principles study of the structural,electronic and elastic properties of solid nitromethane under pressure

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Science China(Physics,Mechanics & Astronomy) 2013年第10期56卷 1874-1881页

作者： CHANG Jing zhou xiaolin ZHAO GuoPing WANG Li College of Physics and Electronic Engineering Sichuan Normal University

The structural,electronic and elastic properties of solid nitromethane are investigated under pressure by performing first-principles density functional theory(DFT)calculations within the generalized gradient approximation(GGA)and the local density approximation(LDA).The obtained ground state structure properties are found to be consistent with existing experimental and theoretical *** pressure-induced variations of structure parameters(a,b,c and V)indicate that the solid nitromethane has an anisotropic compressibility,and the compression along the c direction is more difficult than along a and b *** the vibration curves of intermolecular bond length and bond angle,we find that the C—N bond is the most sensitive among these bonds under pressure,suggesting that the C—N bonds may be broken first under external *** influence of pressure on the electronic properties of solid NM has been studied,indicating that solid NM is an insulating compound with a large indirect band gap and tends to be a semiconductor with increasing ***,we predict the elastic constants and their pressure dependence for the solid NM with the bulk modulus,Young’s modulus,shear modulus and the Poisson’s ratio derived.

关键词： density functional theory crystal structure electronic structure elastic constants nitromethane

Unidirectional rotation of circles driven by chiral active particles

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Chinese Physics B 2018年第11期27卷 634-640页

作者： Jiamin Chen xiaolin zhou Linxi Zhang Department of Physics Zhejiang University Hangzhou 310027 China

The dynamics of two-dimensional rigid circles filled with chiral active particles are investigated by employing the overdamped Langevin dynamics simulations. Unidirectional rotation of rigid circles is observed, and the rotational angular velocity（ω） relies mainly on the length（l）, the number（nB）, and tilt angle（γ） of boards, and the angular velocity（ω）and area fraction（ρ） of chiral active particles. There are optimum values for these parameters at which the average angular velocity of circle reaches its maximum. The center-of-mass mean square displacement for circles drops by about two orders of magnitude for large angular velocity ω of chiral active particles with oscillations in the short-time regime. Our work demonstrates that nanofabricated objects with suitable designs immersed in a bath of chiral active particles can extract and rectify energy in a unidirectional motion.

关键词： unidirectional rotation dynamics chiral active particle nanofabricated object

Effect of thermal shield and gas flow on thermal elastic stresses in 300mm silicon crystal

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Rare Metals 2006年第z2期25卷 45-50页

作者： GAO Yu XIAO Qinghua zhou Qigang DAI xiaolin TU Hailing General Research Institute for Nonferrous Metals Beijing 100088 China General Research Institute for Nonferrous Metals Beijing 100088 China General Research Institute for Nonferrous Metals Beijing 100088 China General Research Institute for Nonferrous Metals Beijing 100088 China General Research Institute for Nonferrous Metals Beijing 100088 China

The thermal elastic stresses induced in 300 mm Si crystal may be great troubles because it can incur the generation of dislocations and undesirable excessive residual stresses. A special thermal modeling tool, CrysVUn, was used for numerical analysis of thermal elastic stresses and stress distribution of 300 mm Si crystal under the consideration of different thermal shields and gas flow conditions. The adopted governing partial equations for stress calculation are Cauchy′s first and second laws of motion. It is demonstrated that the presence and shape of thermal shield, the gas pressure and velocity can strongly affect von Mises stress distribution in Si crystal. With steep-wall shield, however, the maximal stress and ratio of high stress area are relatively low. With slope-wall shield or without shield, both maximal stress and ratio of high stress area are increased in evidence. Whether thermal shields are used or not, the increase of gas flow velocity could raise the stress level. In contrast, the increase of gas pressure cannot result in so significant effect. The influence of thermal shield and gas flow should be attributed to the modification of heat conduction and heat radiation by them.

关键词： thermal elastic stress simulation 300 mm Si single crystal

Comparison of measurements and simulation results in 300mm CZ silicon crystal growth

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Rare Metals 2007年第6期26卷 607-610页

作者： GAO Yu TU Hailing zhou Qigang DAI xiaolin XIAO Qinghua General Research Institute of Non-ferrous Metals Beijing 100088

A special thennat modeling tool, CrysVUn, which was developed by Crystal Growth Laboratory （CGL） of Fraunhofer Institute of Integrated Systems and Devices Technology in Erlangen of Germany, was used for numerical analysis of growth interface situation. The heat transportation, argon flow and melt convection have been considered. Cauchy＇s first and second laws of motion have been the governing partial equations for stress calculation. The measurement results and simulation results were compared and the interface shape and thennat stress distribution during 300 mm Czochralski （CZ） silicon crystal growth with different growth rates were predicted.

关键词： silicon simulation interface growth rate

Efficacy of Bushenjianpi prescription on autoimmune premature ovarian failure in mice

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Journal of Traditional Chinese Medicine 2017年第5期37卷 667-674页

作者： Feng Guilin Lin Meijiao zhou xiaolin Zhang Lihong Li Jing Ouyang Jingfeng Gynecological Department of Traditional Chinese Medicine School Clinic Nanyang Normal University College Department of Pediatrics Dongzhimen Hospital Affialited to Beijing University of Chinese Medicine Department of Traditional Chinese Medicine Nanyang Medical College Department of Oncology the Third People'Hospital of Zhengzhou City Department of Traditional Chinese Medicine Children' Hospital of Kaifeng Morphology Laboratory Experimental Research Center China Academy of Chinese Medical Sciences

OBJECTIVE: To assess the efficacy of Bushenjianpi prescription(BSJPP), a formula from Traditional Chinese Medicine, on a mouse model of autoimmune premature ovarian failure(POF) induced by mouse zona pellucida(ZP3) and to investigate the mechanisms underlying the ***: After randomization, POF was induced in the model mice by immunization with ZP3. One week later, mice received low(8.1 mg/kg), moderate(16.2 mg/kg) and high(32.4 mg/kg) doses of BSJPP by gastrogavage once daily for 90 days. Premarin(0.03 mg/kg) served as the positive group. Serum samples were collected 1 week after the last dose and stored at-20 ℃ for analysis. After cervical dislocation, the uterus and ovaries were collected aseptically for evaluation by histological assessment, scanning electron microscopy, immunohistochemical staining, and Western blot and reverse transcription-polymerase chain reaction ***: Serum E2 levels in POF model mice were decreased, whereas follicle-stimulating hormone(FSH) and luteinizing hormone(LH) levels were dramatically increased. Serum levels of E2,LH and FSH were reduced in POF model mice treated with BSJPP(moderate and high doses) and premarin. Anti-bone morphogenetic protein 15(BMP-15) and connexin 43(Cx43) were repressed in autoimmune POF model mice, whereas high expression was observed in control mice and those treated with BSJPP(moderate and high doses)and ***: BSJPP is effective in treating ZP3-induced POF in mice and the increase in the expression of BMP-15 and Cx43 may be implicated in the mechanism underpinning the action.

关键词： Chinese medical formula Primary ovarian Insufficiency Zona pellucida Follicle-stimulating hormone Luteinizing hormone Connexin 43

A new pterosaur (Pterodactyloidea, Tapejaridae) from the Early Cretaceous Jiufotang Formation of western Liaoning, China and its implications for biostratigraphy

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Chinese Science Bulletin 2003年第1期48卷 16-23页

作者： WANG xiaolin & zhou Zhonghe Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China Correspondence should be addressed to Wang xiaolin (e-mail: xlinwang @***) Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing China

In this article we describe a new and excep-tionally well-preserved pterodactyloid pterosaur, Sinopterus dongi gen. et sp. nov. from the Jiufotang Formation in west-ern Liaoning Province of northeast China. The new species is referred to the family Tapejaridae, representing its first re-cord outside Brazil. It also represents the earliest occurrence as well as the most complete skeleton of the family. Some revisions are made about the family according to the mor-phological observations of the postcranial bones of Sinop-terus. Two pterosaur assemblages appear to have existed in the Jehol Group, represented by the lower Yixian Formation and upper Jiufotang Formation, respectively. The lower pterosaur assemblage shows some resemblance to that of the Late Jurassic in Solnhofen (Tithonian) by sharing members of the Pterodactylidae and Anurognathidae. The upper one shows more resemblance to that of the Early Cretaceous Santana Formation (Aptian/Albian) by comprising only pterodactyloids such as the Tapejaridae. The age of the Yixian Formation is younger than that of the Solnhofen lithographic limestone, and the age of the Jiufotang Forma-tion (Aptian) is slightly older than the Santana Formation.

关键词：辽西朝阳热河组生物地层白垩纪翼龙化石

The Evaluation of Connection Coefficients on an Interval

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Communications in Nonlinear Science and Numerical Simulation 1998年第4期3卷 252-255页

作者： xiaolin zhou and Wu ZHANG(Department of Applied Mathematics, Xi’an Jiao Tong University, Xi’an 710049, China) Department of Applied Mathematics Xi'an Jiaotong University Xi'an 710049 China

A connection coefficient is an interval of products of wavelet basis functions,their derivatives and their translates. It can be used to solve PDEs numerically by the wavelet- Galerkin method. This paper presents an e... 详细信息

关键词： connection coefficients wavelets

Chebyshev Biorthogonal Multiwavelets and Approximation

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Journal of Applied Mathematics and Physics 2021年第2期9卷 233-241页

作者： xiaolin zhou Qun Lin Tan Kah Kee College Xiamen University Xiamen China Mathematical Science College Xiamen University Xiamen China

In this paper, we construct Chebyshev biorthogonal multiwavelets, and use this multiwavelets to approximate signals (functions). The convergence rate for signal approximation is derived. The fast signal decomposition ... 详细信息

关键词： Chebyshev Polynomials Chebyshev Multiwavelets Function Approximation