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Nonlinear Dynamics of Composite Microsheet with Graphene Skins in Non-uniform Thermal Field

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Acta Mechanica Solida Sinica 2020年第5期33卷 707-718页

作者： Xiangying Guo pan jiang Lin Sun Dongxing Cao College of Mechanical Engineering Beijing University of TechnologyBeijing100124China Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures Beijing100124China School of Mechanical Engineering Liaoning Shihua UniversityFushun113001China

The effects of different parameters on the nonlinear dynamic characteristics of macrofiber composite(MFC)microsheet with graphene(GP)skin under non-uniform thermal field are ***,the physical parameters of the MFC–GP structure are calculated by the mixing rule,and the constitutive equations of the structure are set up by employing the Eringen *** nonlinear dynamic equations of the microsheet are obtained by using Hamilton’s ***,the heat conduction equations of the microsheet are considered,adopting Green and Naghdi’s generalized thermoelasticity *** to the Galerkin weighted residual method,the thermoelasticity coupling equations of the structure are ***,the influence of the positive piezoelectric effect of GP and MFC on the vibration response of the structure is also *** nonlinear dynamic governing equations including displacement,coupled thermoelasticity,and electricity field are discretized by the Galerkin *** effects of non-local parameter,volume fraction of GP,and thermal and electricity coupling coefficients on structural dynamic behavior are discussed in the numerical simulation.

关键词： MFC-GP microsheet Non-uniform thermal field Nonlocal parameter Nonlinear dynamic responses

One novel multidimensional organic-inorganic hybrid based on polyoxometalates and copper chlorine coordination polymers with 4,4'-bipyridine ligands

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Chinese Chemical Letters 2012年第7期23卷 859-862页

作者： Li Chun Xuan Qing jiang pan School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080China

One novel organic-inorganic hybrid materials with 4,4＇-bipy ligands and copper chlorine coordination polymers as linkers,with new topology,{[Cu^I（4,4＇-bipy）]_（10）Cl_2（SiW_（12）O_（40））_2}·6H_2O（1）（4,4＇-bipy = 4,4＇-bipyridine）,has been hydrothermally synthesized. The single crystal X-ray structural analysis reveals that the structure of 1 is constructed from classical Keggin anions and[Cu^I（4,4＇- bipy）]cations into a novel,three-dimensional（3D） polyoxometalates（POMs）based *** the topological view,compound 1 is a novel（3.4^4.5^2.6^3）（3^2.4^4.5^6.6^9） *** electrochemical and photocatalysis properties of 1 have been investigated in details.

关键词： Polyoxometalate Tungstoferrate Framework Novel topology

Immobilization of trophic anaerobic acetogen for semi-continuous syngas fermentation

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Chinese Journal of Chemical Engineering 2021年第1期34卷 311-316页

作者： Lijuan Zhang Peng Hu jiang pan Huilei Yu Jianhe Xu State Key Laboratory of Bioreactor Engineering Shanghai Collaborative Innovation Centre for BiomanufacturingEast China University of Science and TechnologyShanghai 200237China Shanghai GTL Biotech Co.Ltd. Shanghai 200438China

The massive consumption of fossil energy force s people to find new source s of *** fermentation has become a hot research field as its high potential in renewable energy production and sustainable *** this study,trophic anaerobic acetogen Morella thermoacetica was successfully immobilized by calcium alginate embedding *** ability of the immobilized cells on production of acetic acid through syngas fermentation was compared in both airlift and bubble column *** bubble column bioreactor was selected as the better type of *** production of acetic acid reached 32.3 g·L^(-1) in bubble column bioreactor with a space-time yield of 2.13 g·L^(-1)·d^(-1).The immobilized acetogen could be efficiently reused without significant lag period,even if exposed to air for a short time.A semi-continuous syngas fermentation was performed using immobilized cells,with an average space-time acetic acid yield of 3.20 g·L^(-1)·d^(-1).After 30 days of fermentation,no significant decrea se of the acetic acid production rate was observed.

关键词： Anaerobic Syngas Acetic acid Immobilization Bioreactors Semi-continuous fermentation

Cretaceous desert cycles, wind direction and hydrologic cycle variations in Ordos Basin: Evidence for Cretaceous climatic unequability

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Science China Earth Sciences 2004年第8期47卷 727-738页

作者： jiang Xinsheng pan Zhongxi XIE Yuan LI Minghui Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059China Chengdu Institute of Geology and Mineral Resources CGSChengdu 610082China Chengdu Institute of Geology and Mineral ResourcesCGSChengdu 610082China Chengdu Institute of Geology and Mineral ResourcesCGSChengdu 610082China Chengdu Institute of Geology and Mineral ResourcesCGSChengdu 610082China

Climatic state under greenhouse effect is a currently hot point. Whether greenhouse climate in geological history, especially in Cretaceous, was equable or not has aroused extensive discussion. By analysis on depositional cyclcity, wind direction change and hydrologic cycle variation of Cretaceous desert in the Ordos Basin of China, the unequability of Cretaceous cli-mate is dealt. It is shown that Cretaceous climate was extremely cyclic, not only having long and mid term but also having strong seasonal even instantaneous changes. Therefore, it is sug-gested that Cretaceous climate was not equable.

关键词： Ordos Basin of China,Cretaceous desert cycle,wind direction change,hydrologic cycle variation,Cretaceous climatic unequability.

SYNTHESIS AND CHARACTERIZATION OF NEW STABILIZERS WITH OPTIMAL MOLECULAR WEIGHT

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Chinese Journal of Polymer Science 2001年第4期19卷 341-350页

作者： jiang-qing pan Institute of Chemistry Chinese Academy of Sciences, Beijing 100080 China 中科院化学所北京

Over 2 x 10(8) tons of polymers are produced every year, and a large portion of polymers faces the degradation problem. There are many effective methods to protect polymers against degradation and the addition of stabilizers to polymer remains the most convenient and effective way of enhancing polymer life and performance. In this article, a series of effective stabilizers with optimal molecular weight (MW), including common, monomeric and polymeric stabilizers (antioxidant and light stabilizer) were synthesized using isocyanation, controlled isocyanation, hydrosilylation, epoxide addition, macroreaction of stabilizing functional compounds and polymerization of monomeric stabilizers. The structure and performance of these new stabilizers were characterized by using IR, NMR, MS, UV-spectra, XPS and elemental analysis. The current development of stabilizer synthesis was also reviewed.

关键词： preparation of stabilizer antioxidant hindered amine light stabilizer isocyanation hydrosilylation

Asymmetric bioreduction of γ- and δ-keto acids by native carbonyl reductases from Saccharomyces cerevisiae

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Chinese Journal of Chemical Engineering 2021年第1期34卷 305-310页

作者： Chunlei Ren Tao Wang Xiaoyan Zhang jiang pan Jianhe Xu Yunpeng Bai State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237China Shanghai Collaborative Innovation Centre for Biomanufacturing East China University of Science and TechnologyShanghai 200237China

Optically pure(R)-γ-and(R)-δ-lactones can be prepared by intramolecular cyclization of chiral hydroxy acids/esters reduced asymmetrically from γ-and δ-keto acids/esters using Saccharomyces cerevisiae(***) as a whole-cell ***,some of the enzymes catalyzing these reactions in *** are still unknown up to *** this report,two carbonyl reductases,OdCRl and OdCR2,were successfully discovered,and cloned from *** using a genome-mining approach,and overexpressed in Escherichia coli(***).Compared with OdCR1,OdCR2 can reduce 4-oxodecanoic acid and 5-oxodecanoic acid asymmetrically with higher stereoselectivity,generating(R)-γ-decalactone(99% ee) and(R)-δ-decalactone(98% ee) in 85% and 92%yields,*** is the first report of native enzymes from *** for the enzymatic synthesis of chiral γ-and δ-lactones which is of wide uses in food and cosmetic industries.

关键词： Keto acids/esters (R)-γ-/δ-Decalactones Carbonyl reductase Asymmetric reduction Saccharomyces cerevisiae

Hydrogenic-Donor Impurity States in GaAs/Al xGa 1−xAs Quantum Dots in the Presence of an Electric Field

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Chinese Physics Letters 2011年第8期28卷 217-220页

作者： pan jiang-Hong LIU Li-Zhe LIU Min College of Physical and Technology Guangxi Normal UniversityGuilin 541004

We report a calculation of binding energy of the ground state of a hydrogenic donor in a quantum cylindrical GaAs dot surrounded by Ga1−xAlxAs with finite confinement potentials,in the presence of a uniform electric field applied parallel to the dot *** binding energy increases inchmeal as the radius of the dot decreases until a maximum value for a certain value of the quantum dot radii,then begins to drop *** for the binding energies and electronic wave function density of the hydrogenic-donor as functions of the impurity position,dot thickness and applied electric field are also presented.

关键词： donor quantum radius

THE SCIENCE AND TECHNOLOGY IS THE KEY TO VIGOROUSLY DEVELOP THE FORESTRY

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Journal of Northeast Forestry University 1991年第2期2卷 111-114页

作者： jiang Minyuan pan Haiying Northeast Forestry University Northeast Forestry University China

The forestry is the main department of the national economy. During forty years development of the forestry , it has made a lot of contribution for the national economic construction and society development. However, paying more attention to the logging than to the silviculture for a long time lead that the felling amount has been more than the growth in volume of forest. And the forest resources have much decreased. The forestry is now faced to many difficulties. The forestry problems should be tackled by relying on the progress of science and technology. The achievements of science and technology should be first spread in forest zone. And the second task is that the step of the progress of science and technology in forestry enterprises should be quicken. In order to raise the economic benefits of forestry enterprises. The key problems of science and technology in forestry should be tackled by cooperation. Raising, the level of forestry science and technology and enlarging the international exchange are the other important aspect of vigorously developing the forestry.

关键词： Forestry Crises Development Technology

Study on extraction kinetics ofα-cyclopentylmandelic acid enantiomers with hydroxyethyl-β-cyclodextrin as chiral selector

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Chinese Journal of Chemical Engineering 2018年第1期26卷 67-72页

作者： panliang Zhang pan jiang Weifeng Xu Yu Liu Biquan Xiong Yunren Qiu Kewen Tang Department of Chemistry and Chemical Engineering Hunan Institute of Science and TechnologyYueyang 414006China School of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China College of Chemical Engineering Xiangtan UniversityXiangtan 411105China

In this work,the kinetic study on reactive extraction ofα-cyclopentylmandelic acid(α-CPMA)enantiomers was performed in a Lewis cell using hydroxyethyl-β-cyclodextrin(HE-β-CD)as chiral *** enantioselective complexation equilibrium between HE-β-CD andα-CPMA enantiomers was studied by phase solubility *** important process parameters affecting the initial extraction rate were separately studied and the reaction rate equations were *** optimal conditions for kinetic study were as follows:stirring speed of 75 r·min^(-1),interfacial area of 12.56 cm^2,pH of 2.5,initial HE-β-CD concentration of 0.05 mol·L^(-1),initialα-CPMA concentration of 5 mmol·L^(-1),and temperature of 278 *** reaction has been found to be first order inα-CPMA and second order in HE-β-CD with the forward rate constants of 2.056×10^(-3)m^6·mol^(-2)·s^(-1)and 1.459×10^(-3)m^6·mol^(-2)·s^(-1)for(S)-α-CPMA and(R)-α-CPMA,*** complexation equilibrium constants were evaluated as 61 L·mol^(-1) and 117 L·mol^(-1)for(S)-α-CPMA and(R)-α-CPMA,and the intrinsic enantioselectivity is estimated as 1.92.

关键词： Kinetics Liquid-liquid extraction Chiral resolution α-Cyclopentylmandelic acid