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| 1 | Maturation sequence of Tertiary crude oils in the Qaid-am Basin and its significance in petroleum resource as-sessment显示文摘 | HUANG Difan LI Jinchao ZHANG Dajiang | 1991 | Journal of Southeast Asian Earth Sci-ences1991，5，14： | 1 |
| 2 | Microstructure Evolution and Grain Coarsening Behaviour During Partial Remelting of Cyclic Extrusion Compression Formed AZ61 Magnesium Alloy显示文摘The effects of CEC passes, isothermal holding time and reheating temperature on the microstructure evolution and grain coarsening behaviour of AZ61 magnesium alloy produced by the recrystallisation and partialmelting (RAP) process were investigated. Before partial remelting, as-cast AZ61 alloy was deformed by cyclic extrusion compression (CEC) with one pass and two pass at 330℃. After CEC, the microstructure consisted of unrecrystallized grains and deformed eutectic compounds. Increasing isothermal holding time resulted in the formation of spheroidal grains surrounded by liquid films. With increasing the isothermal holding time, the solid grain size increased and the degree of spheroidization was improved. With increasing the reheating temperature, namely increasing liquid fraction, the solid grain size obviously decreased during the period from 560℃ to 570℃ and then slightly increased after 570℃, while the shape factor increased monotonously. During partial remelting, increasing reheating temperature can properly short the isothermal holding time to obtain fine structure. Moreover, increasing the numbers of CEC passes could produce finer semi-solid mi- crostructure. The coarsening behavior of solid grains in the semi-solid state obeys Ostwald ripening and grain coalescence mechanisms. The coarsening rate constant, K, was 80 μm3 · s-1 for samples partially remelted at 595℃. After CEC plus partial remelting, the ideal and fine semi-solid state structure can be obtained, which was suitable for thixoforming. | Changpeng WANG Huasheng MEI Rongqiang LI Difan LI Ling WANG Jie LIU Zehui HUA Lijin ZHAO Feifei PEN Hui LI | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，2： | 1 |
| 3 | Maturation sequence of Tertiary crude oils in the Qaidam Basin and its significance in petroleum resource assessment显示文摘 | Huang Difan Li Jinchao Zhang Dajiang Huang Xiaoming Zhou Zhuhong | 1991 | J Southeast Asian Earth Sci1991，5，14： | 1 |
| 4 | Maturation sequence of continental crude oils in hydrocarbon basins in China and its significance显示文摘 | Huang Difan Li Jinchao Zhang Dajiang | 1990 | Organic Geochemistry1990，16，3： | 1 |
| 5 | Maturation sequence of continental crude oils in hydrocarbon basins in China and its signi- ficance 显示文摘 | Huang Difan Li Jinchao Zhang Dajiang | 1990 | Organic Geochemistry1990，16，： | 1 |
| 6 | Vicinal hydroxyl group-inspired selective oxidation of glycerol to glyceric acid on hydroxyapatite supported Pd catalyst显示文摘Selective oxidation of glycerol provides a feasible route towards the sustainable synthesis of high value-added chemicals.Herein,the hydroxyapatite(HAP)supported palladium(Pd)species were fabricated by impregnation and subsequent calcination.The as-obtained heterogeneous Pd catalyst afforded not only excellent selectivity to glyceric acid(GLA)up to 90%with 59%conversion of glycerol but also good recyclability by using molecular oxygen as an oxidant under mild conditions.The characterization of catalysts indicated that both the surface basicity and Pd sites on the catalyst played a crucial role in promoting glycerol oxidation.Notably,it demonstrated that the presence of the vicinal hydroxyl group of glycerol molecule can assist the oxidation reaction via forming a coordination between the vicinal hydroxyl group and Ca^(2+) sites on HAP-derived catalysts.In this catalytic process,the secondary hydroxyl of glycerol kept untouched and the primary hydroxyl of glycerol was converted into carboxyl group,while the Pd species acted as active centers for cooperatively promoting the subsequent oxidation to generate GLA.Additionally,this catalytic system can be extended widely for the oxidative conversion of other vicinal diols into the corresponding a-hydroxycarboxylic acids selectively.Isotope labeling experiment using H_(2)^(18)O confirmed that H_(2)O not only acted as solvent but also was involved in the catalytic cycles.On the basis of the results,a possible reaction mechanism has been proposed.The HAP-supported Pd catalytic system has been shown to serve as an effective approach for the upgrading of bio-derived vicinal diols to high value-added chemicals. | Difan Li Xiuge Zhao Qingqing Zhou Bingjie Ding Anna Zheng Qingpo Peng Zhenshan Hou | 2022 | Green Energy & Environment2022，7，4： | 1 |
| 7 | Biodegraded sequence of Kalamay oils and semi-quantitative estimation of their biodegraded degrees in Junggar Basin,China显示文摘 | Zhang Dajiang Huang Difan Li Jinchao | 1988 | Organic Geochemistry1988，13，： | 1 |
| 8 | Selective Oxidation of Glycerol with Hydrogen Peroxide Using Silica- Encapsulated Heteropolyacid Catalyst显示文摘 | YUAN Mingming LI Difan ZHAO Xiuge MA Wenbao KONG Kang NI Wenxiu GU Qingwen HOU Zhenshan | 2018 | 物理化学学报2018，34，8： | 1 |
| 9 | Biodegraded sequence of Karamay oi ls and semi-quantitative estimation of their biodegraded degree in Jungger Ba s i n, China显示文摘 | Huang Difan Li Jinchao | 1988 | Organic Geochemistry1988，13，2： | 1 |
| 10 | Maturation se- quence of Tertiary crude oils in the Qaidam basin and its sig nificance in petroleum resource assessment 显示文摘 | Huang Difan Li Jinchao Zhang Dajiang | 1991 | Journal of Southeast Asian Earth Sciences1991，5，14： | 1 |
| 11 | Maturation sequence of Tertiary crude oils in the Qaidam basin and its significance in petroleum resource assessment显示文摘 | Huang Difan Li Jinchao Zhang Dajiang | 1991 | Journal of Southeast Asian Earth Sciences1991，5，14： | 1 |
| 12 | Maturation sequence of continental crude oils in hydrocarbon basins in China and its significance显示文摘 | Huang Difan Li Jinchao Zhang Dajiang | 1990 | Organic Geochemistry1990，16，123： | 1 |
| 13 | Maturation se- quence of Tertiary crude oils in the Qaidam Basin and its signifi- cance in petroleum resource assessment显示文摘 | Huang Difan Li Jinchao Zhang Dajiang | 1991 | Journal of Southeast Asian Earth Sciences1991，5，14： | 1 |
| 14 | Carbon isotopic study of individual n-alkanes in certain modern organisms显示文摘Simulation experiment was carried out on all kinds of modern organisms significant to oil-gas generation and the C-isotopic values of n-alkanes in different organisms. The distribution characteristics of individual n-alkane isotopes are studied. The experimental results supply important clues in biological provenance of n-alkanes in sedimentary organisms. | Linye Zhang Tieguan Wang Difan Huang Juyuan Li Xiangchen Li Mei Shan Xinzhou Wang | 1999 | Chinese Science Bulletin1999，44，12： | 0 |
| 15 | THE CHALLENGES FOR THE ENFORCEMENT AGAINST COPYRIGHT VIOLATIONS IN CHINA UNDER THE TRIPS AGREEMENT显示文摘当海盗行为是在中国的一个严重问题时,它也是一颗全球担心。在内国内并且旅行上下文,这篇文章在中国,他们中国版权法律的实施上的影响,和他们的原因讨论版权违背的各种各样的形式。特别地,这篇文章在使版权法律的实施极其困难的中国讨论唯一的方面;因为它对中国适用,刑法怎么应该对海盗行为在战斗被使用,并且中国怎么解释旅行协议,也分析。另外,这篇文章探索是可能的在中国成为版权违背的问题的未来答案的几个工具。 | Difan Qu Yahong Li | 2012 | Frontiers of Law in China-Selected Publications from Chinese Universities2012，7，2： | 0 |
| 16 | Nucleation and epitaxy growth of high-entropy REBa_(2)Cu_(3)O_(7-δ)(RE=Y,Dy,Gd,Sm,Eu)thin films by metal organic deposition显示文摘High-entropy REBa_(2)Cu_(3)O_(7-δ)(RE=Y_(0.7)+Dy_(0.2)+Gd_(0.2)+Sm_(0.2)+Eu_(0.2))(HE-REBCO) superconducting films doped with multiple rare earth elements were successfully fabricated with thickness up to 800 nm by a trifluoroacetate-metal organic deposition(TFA-MOD).The enhanced entropy change ΔS of the HEREBCO system promotes the c-axis growth of REBCO thin film in the competition with a/b-axis growth.The microstructure and element distribution were investigated by the transmission electron microscopy(TEM) and energy dispersive spectroscopy(EDS).The results show that HE-REBCO films have a great amount of stacking defects,lattice distortions and various rare earth oxides.Furthermore,the microstrain of HE-REBCO films increases significantly compared to the undoped YBCO and(Y,Dy)BCO films.Finally,the superco nducting critical temperature(T_c^(onset)) of HE-REBCO films is about 93 K,and the in-field properties are significantly improved,especially at the temperature of about 77 K.The maximum pinning force density(F_(p,max)) of the HE-REBCO samples at 77 K is 1.7 times higher than that of the undoped YBCO films. | Jing Chen Rongtie Huang Xinghang Zhou Difan Zhou Minjuan Li Chuanyi Bai Zhiyong Liu Chuanbing Cai | 2023 | Journal of Rare Earths2023，41，7： | 0 |
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