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Microstructure evolution and reaction behavior of Cu–Ni alloy and B4C powder system

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Progress in Natural Science:Materials International 2021年第1期31卷 55-62页

作者： Lei Jia ming-fang Yang Zhen-lin Lu Jin Xu Hui Xie Katsuyoshi Kondoh School of Materials Science and Engineering Xi'an University of Technology School of Materials Engineering Xi'an Aeronautical University Joining and Welding Research Institute Osaka University

Microstructure evolution and reaction behavior of Cu–Ni alloy and B4C power system was studied by in-situ and static experimental investigations along with theoretical calculations. The reaction process was as follows. Firstly,B4C decomposed into B and C atoms, and then B atoms diffused into Cu–Ni matrix, leading to the formation of Ni2B particles. Subsequently, Ni atoms diffused into B4C, forming a loose mixture of Ni2B and amorphous C at the initial powder boundary. Finally, with the completion of reaction, Ni2B particles at the powder boundary grew into a monolithic block, and then C substance was excluded out and accumulated at the edge of this monolithic Ni2B block. It is believed that the formation of Ni2B phase is caused by the most negative change of Gibbs free energy among all the potential reactions between Ni–B and Ni–B4C systems.

关键词： Metal-matrix composites Reaction behavior Microstructure evolution Cu–Ni/B4C composite In-situ experiment

Synthesis of Syndiotactic Polystyrene/Atactic Polypropene Block Copolymer in the presnece of Half-sandwich Titanocene Catalysts

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Chemical Research in Chinese Universities 2000年第1期16卷 83-89页

作者： ZHU fang-ming WU Qing, fang YU-tang HUANG Qun-fang and LIN Shang-an (Institute of Polymer Science, Zhongshan University, Guangzhou, 510275, P. R. China) Zhongshan Univ Inst Polymer Sci Guangzhou 510275 Peoples R China

Some highly active η~5-pentamethylcyclopentadienyltribenzyloxy titanium complexes [Cp Ti(OBz)_3] activated by modified methylaluminoxane (mMAO) were prepared and used as the catalyst for styrene syndiospecific polymerization and propene atactic polymerization. Styrene could be copolymerized with propene when the propene was prepolymerized for a period, to which styrene and tri-isobutylaluminum (TIBA) were then added. The titled block copolymer together with the related homopolymers was obtained. The copolymerization porducts can be divided into the homopolymers and the copolymer by successive solvent extraction with boiling butanone, heptane and tetrahydrofuran (THF), and each fraction was characterized by ~13C NMR, DSC and WAXD. It was found that aPS and aPP were soluble in boiling butanone and heptane respectively. The block copolymer (sPS-b-aPP) composed of syndiottactic polystyrene segment was soluble in boiling THF and the residue was chiefly sPS.

关键词： Metallocene catalyst Syndiotactic polystyrene Atactic polypropene Styrene and preopene coploymerization

Synthesis and Absorption Properties of Leaf-like Nd2Cu2O4+δ via a Coordination Complex Method with [NdCu(3,4-pdc)2(OAc)(H2O)5]·6.5H2O Precursor

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Chinese Journal of Structural Chemistry 2020年第4期39卷 737-746页

作者： ZHAO Yao YOU Jun-Hua LV Wen-Quan fang ming School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Institute of Modern Physics Chinese Academy ofSciences(CAS)Lanzhou 730000China Department of Chemistry Hebei Normal University of Science&TechnologyQinhuangdao 066004China

Nd2Cu2O4+δnanosheets were synthesized via coordination complex method(CCM)by using[NdCu(3,4-pdc)2(OAc)(H2O)5]·6.5H2O(1,3,4-pdc=3,4-pyridinedicarboxylic acid)as the *** to the particles prepared by SSM(simple solution method),Nd2Cu2O4+δprepared by CCM showed leaf-like morphology composed of nanosheets with an average thickness of 50~80 nm and a BET surface area up to 17.9 m^2/*** Nd2Cu2O4+δsamples exhibit selective adsorption towards malachite green(MG)with significant Qm(maximum adsorption capacity)values reaching up 1.55 g/g at room temperature,and the thermodynamic parameters of adsorption process were *** addition,the properties of selective adsorption of the prepared samples were investigated by temperature change tests.

关键词： Nd2Cu2O4+δ coordination-complex method simple solution method selective adsorption malachite green

Molecular mechanism of temperature-dependent sex determination and differentiation in Chinese alligator revealed by developmental transcriptome profiling

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Science Bulletin 2018年第4期63卷 209-212页

作者： Jian-Qing Lin Qi Zhou Hai-Qiong Yang Li-ming fang Ke-Yi Tang Li Sun Qiu-Hong Wan Sheng-Guo fang The Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education and State Conservation Center for Gene Resources of Endangered WildlifeCollege of Life SciencesZhejiang UniversityHa ngzhou 310058China Life Sciences Institute Zhejiang UniversityHangzhou 310058China Changxing Yinjiahian Chinese Alligator Nature Reserve Changxing 313100China

Sex determination(SD)is a critical embryonic development process that has profound impacts on the morphology of individuals and the survival of populations[1].In vertebrates,sex can be determined by either genetic or environmental factors[2],with the underlying molecular mechanism unknown for most species except for a few model organisms[3,4].Unlike mammals and birds,

关键词：温度依赖短吻鳄性别中国机制分子性染色体脊椎动物

Science Letters:Hydrothermal production of formic and acetic acids from syringol

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第8期11卷 613-618页

作者： Lu-ting PAN Zheng SHEN Lei WU Ya-lei ZHANG Xue-fei ZHOU fang-ming JIN MOE Key Laboratory of Yangtze River Water Environment State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China

The production of formic and acetic acids （or salts） by hydrothermal oxidation of syringol, a model compound for lignin, was investigated using a batch reactor. Results show that the highest yields of formic and acetic acids were, respectively, 59.6% and 11.3% at the reaction condition of 0.5 mol/L NaOH, 120% H2O2 supply and 280 ℃. These results will inform studies aiming to develop more enviromnental friendly lignin conversion processes by obtaining products beyond a CO2 end product.

关键词： Lignin Syringol Formic acid. Acetic acid. Hvdrothermal process

China's long-term low carbon transition pathway under the urbanization process

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Advances in Climate Change Research 2019年第4期10卷 240-249页

作者： LIU Jun-Ling WANG Ke XIAHOU Qin-Rui LIU fang-ming ZOU Ji KONG Ying School of Economics and Management Harbin Institute of Technology(Shenzhen)Shenzhen518055China Tsinghua-Berkeley Shenzhen Institute Tsinghua UniversityShenzhen518055China School of Environment&Natural Resources Renmin University of ChinaBeijing100872China Department of Economics York UniversityTorontoM3J1P3Canada

This study develops a comprehensive analysis framework and socio-economic energy system model that interlinks demographic change and energy system in order to analyze the urbanization process and its relation with China's long-term CO2 emissions trend as China'economy enters the“new normal”*** results show that,around 300 million people are expected to migrate from rural areas to urban areas by 2050 following a trend,in which people are moving gradually from small and medium city groups to large and super city *** migration trend together with the improvement in living standard will promote China's infrastructure construction,industry production,and energy service demand *** the Business as Usual(BAU)scenario,total primary energy consumption in China will reach 8.4 Gtce by 2050,energyrelated CO2 emissions will increase to 17.6 Gt,which is 83%higher than the 2013 *** in the Low Carbon Transition(LCT)scenario with technology innovation,the total primary energy demand for China in 2050 could be controlled at^6 Gtce;CO2 emissions would peak during 2020—2025,and be reduced by 78%by 2050 compared to the BAU *** the transition process,non-fossil fuel power generation and energy efficiency technologies have the largest mitigation *** and power sectors would peak first before 2020,followed by the building and transport sectors which are projected to peak around *** total additional capital investment required for LCT would account for 1.5%of ***,it is technologically and economically feasible for China to implement new urbanization strategy.

关键词： Urbanization Population migration Consumption demand Low carbon transition Bottom-up model

Assisted Cloning and Orthogonal Complementing of an Arbitrary Unknown Two-Qubit Entangled State

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Communications in Theoretical Physics 2006年第5X期46卷 849-852页

作者： fang ming LIU Yi-Min LIU Jun SHI Shou-Hua ZHANG Zhan-Jun School of Physics & Material Science Anhui University Hefei 230039 China Department of Physics Shaoguan University Shaoguan 512005 China The State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics the Chinese Academy of Sciences Wuhan 430071 China

Based on A.K. Pati＇s original idea [Phys. Rev. A 61 （2000） 022308] on single-qubit-state-assisted clone, very recently Zhan has proposed two assisted quantum cloning protocols of a special class of unknown two-qubit entangled states [Phys. Lett. A 336 （2005） 317]. In this paper we further generalize Zhan＇s protocols such that an arbitrary unknown two-qubit entangled state can be treated.

关键词： quantum cloning arbitrary two-qubit entangled state two-qubit projective measurement

Power Coal Transportation and Storage:A Programming Analysis of Road and Rail Options

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Wuhan University Journal of Natural Sciences 2011年第6期16卷 469-474页

作者： fang Debin ZHANG ming WANG Xianjia Economics and Management School Wuhan UniversityWuhan 430072 Hubei China

In this study, the transportation and storage problems for regional power coal allocation planning are formulated as transportation and storage problems to realize the minimization of the regional transportation and storage cost. An effective optimiza- tion model is proposed to solve transportation and storage prob- lems for regional power coal allocation planning, which has inter- active effect on multiple participants, such as regional power plants, coal transportation companies, logistics centers, and coal storage centers. A case study illustrates that the model and algo- rithm are more reasonable compared with the classic transporta- tion model, and the sensitivity analysis improves transportation and storage strategies for regional power coal allocation planning. Results demonstrate that this model can not only satisfy more of the actual requirements of the integral system but also offer more information to the decision-makers （DMs） for reference in favor of exalting decision-making quality.

关键词： power coal transportation problems storageproblems optimization model allocation

Effect of Initialization Technical Parameters on Optical Absorption of Ge_2Sb_2Te_5 Thin Films

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Journal of Materials Science & Technology 2004年第5期20卷 509-511页

作者： ming fang, Qinghui LI and Fuxi GANShanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China Inst. of Optics and Fine Mech. Chinese Acad. of Sci. Shanghai 201800 China

The optical absorption properties of phase-change optical recording thin films subjected to various initialization conditions were investigated. The effects of initialization power and velocity on optical constants of the Ge2Sb2Te5 thin films were also studied. The energy gap of Ge2Sb2Te5 thin films subjected to various initialization conditions was also obtained. It was found that the optical energy gap of the Ge2Sb2Te5 thin films increased with either increasing initialization laser power or decreasing initialization velocity, with peak of 0.908 eV at laser power of 1000 mW or initialization velocity of 4.0 m/s, but the continued increasing initialization laser power or decreasing initialization velocity resulted in the decrease of the optical energy gap. The change of the optical energy gap was discussed on the basis of amorphous crystalline transformation.

关键词： Phase transformation Optical recording Ge2Sb2Te5 Optical absorption Energy gap