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最简方案特征一致操作再探——以法语附着化为例

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现代外语 2024年第2期47卷 160-171页

作者：胡笑适清华大学北京市100084

本文聚焦法语附着词的句法分布及其句法允准机制。前人将法语附着化的句法机制诉诸于附着词的“结构缺损”或“特征缺损”。然而,法语不同类型附着词具有不同的形态表征,且在致使结构中的分布各不相同,因此无论“结构缺损论”还是“特... 详细信息

本文聚焦法语附着词的句法分布及其句法允准机制。前人将法语附着化的句法机制诉诸于附着词的“结构缺损”或“特征缺损”。然而,法语不同类型附着词具有不同的形态表征,且在致使结构中的分布各不相同,因此无论“结构缺损论”还是“特征缺损论”都无法对上述现象给出统一解释。本研究在生成句法理论框架下,将决定句法依存关系的特征一致操作拆分三个独立句法操作,并系统考察了法语不同类别附着词的句法分布及附着词的句法允准机制,提出了“共同决定论”:附着词的允准是其结构的不完整性与其携带的形式特征共同决定的。研究指出,附着化的根本动因是附着词的结构性缺损,而附着词的位置由附着词携带的特征内容以及三个句法操作的不同参与度决定。

关键词：特征一致法语附着化致使结构句法依存关系生成句法理论框架

Effects of hot extrusion on microstructure and mechanical properties of Mg matrix composite reinforced with deformable TC4 particles

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Journal of Magnesium and Alloys 2020年第2期8卷 421-430页

作者： Xiaojun Wang Xiaoming Wang xiaoshi hu Kun Wu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Mg matrix composites were often reinforced by non-deformable ceramic *** this paper,a novel Mg matrix composite reinforced with deformable TC4(Ti-6Al-4 V)particles was fabricated and then *** evolutions of microstructure and mechanical properties of the composite during hot extrusion were *** extrusion refined giains and eliminated the segregation of TC4 ***4 particles,as deformable particles,stimulated the nucleation of dynamic recrystallization during ***,since the deformation of TC4 particles partly released the stress concentrations around them,the recrystallized grains are just slightly smaller around TC4 particles than that away from them,which is evidently different from the case in Mg matrix composites reinforced by non-deformable ceramic *** with AZ91 matrix composites reinforced by SiC particles,the present composite possesses the superior comprehensive mechanical properties,which are attributed to not only the strong interfacial bonds between TC4p and matrix but also the deformability of TC4 particles.

关键词： Mg matrix composites Ti particles Hot extrusion Mechanical properties

Direct conversion of CO_(2)to graphene via vapor–liquid reaction for magnesium matrix composites with structural and functional properties

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Journal of Magnesium and Alloys 2023年第4期11卷 1206-1212页

作者： Xuejian Li Xiaojun Wang xiaoshi hu Chao Xu Wenzhu Shao Kun Wu State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001PR China National Key Laboratory of Precision Hot Processing of Metal Harbin Institute of TechnologyHarbin 150001PR China

Converting CO_(2)to valuable materials is attractive in environmental protection and resource *** this study,a vapor-liquid interface reaction system for mass production of high-quality graphene is *** graphene obtained has high crystallinity and few defects during the reaction of CO_(2)and Mg *** growth mechanism of graphene is demonstrated in vapor-liquid interface area by combining the CO_(2)bubbles as a soft template to guide growth with the confinement effect of dense MgO *** quality of the graphene is verified by epoxy composites with high electromagnetic shielding ***,the V-L reaction method ingeniously solves the dispersion of graphene in metal,providing a preparation strategy of Mg matrix composites with structure and function integration.

关键词： Graphene Vapor-liquid interface Magnesiothermic reaction Dispersion Shielding effectiveness

Development and strengthening mechanisms of a hybrid CNTs@SiCp/Mg-6Zn composite fabricated by a novel method

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Journal of Magnesium and Alloys 2021年第4期9卷 1370-1379页

作者： Chao Ding xiaoshi hu Hailong Shi Weimin Gan Kun Wu Xiaojun Wang National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology92 West Dazhi StreetHarbinHeilongjiang 150001PR China GEMS at Heinz Maier-Leibnitz Zentrum(MLZ) Helmholtz-Zentrum GeesthachtLichtenbergstr.1D-85748 GarchingGermany

The hybrid addition of CNTs was used to improve both the strengths and ductility of SiCp reinforced Mg matrix composites.A novel method was developed to simultaneously disperse SiCp and CNTs in Mg ***,new CNTs@SiCp hybrid reinforcements were synthesized by ***,CNTs were well pre-dispersed on the SiCp surfaces before they were added to Mg ***,the following semisolid stirring and ultrasonic vibration dispersed the new hybrid reinforcements well in Mg-6Zn *** hybrid composite exhibits some unique features in *** the distribution of SiCp was very uniform in the Mg-6Zn matrix,most CNTs distributed along the strips in the state of micro-clusters,in which CNTs were bonded very well with Mg *** of the CNTs kept their structure integrity during fabrication *** these factors ensure that the hybrid composite have much higher strength and elongation than the mono SiC/Mg-6Zn *** dominant strengthening mechanism is the load transfer effect of *** from grain refinement,the CNTs toughen the composites by impeding the microcrack propagation inside the ***,the hybrid CNTs@SiCp successfully realizes the reinforcing advantage of“1+1>2”.

关键词： Hybrid CVD Mg matrix composites Strengthening mechanism Ultrasonic vibration

One-Pot Synthesis of Co-Based Coordination Polymer Nanowire for Li-Ion Batteries with Great Capacity and Stable Cycling Stability

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Nano-Micro Letters 2018年第2期10卷 3-11页

作者： Peng Wang Xiaobing Lou Chao Li xiaoshi hu Qi Yang Bingwen hu State Key Laboratory of Precision Spectroscopy Shanghai Key Laboratory of Magnetic Resonance School of Physics and Materials Science East China Normal University

Nanowire coordination polymer cobalt–terephthalonitrile(Co-BDCN) was successfully synthesized using a simple solvothermal method and applied as anode material for lithium-ion batteries(LIBs). A reversible capacity of 1132 mAh g^(-1) was retained after 100 cycles at a rate of 100 mAg^(-1), which should be one of the best LIBs performances among metal organic frameworks and coordination polymers-based anode materials at such a rate. On the basis of the comprehensive structural and morphology characterizations including fourier transform infrared spectroscopy,~1 H NMR,^(13)C NMR, and scanning electron microscopy, we demonstrated that the great electrochemical performance of the as-synthesized Co-BDCN coordination polymer can be attributed to the synergistic effect of metal centers and organic ligands, as well as the stability of the nanowire morphology during cycling.

关键词： Nanowire Coordination polymer Lithiumion battery Anode Ultra-high capacity

Improving the Young’s modulus of Mg via alloying and compositing–A short review

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Journal of Magnesium and Alloys 2022年第8期10卷 2009-2024页

作者： Hailong Shi Chao Xu xiaoshi hu Weimin Gan Kun Wu Xiaojun Wang National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001PR China Center for Analysis and Measurement Harbin Institute of TechnologyHarbin 150001PR China GEMS at MLZ Helmholtz-Zentrum Hereon Lichtenbergstrsasse 1Garching D-85748Germany School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001PR China

Lightweight,high-modulus structural materials are highly desired in many applications like aerospace,automobile and biomedical *** the lightest metallic structural material,magnesium(Mg)has great potential but is limited by its low intrinsic Young’s *** paper reviews the investigations on high-modulus Mg-based materials during the last *** nature of elastic modulus is introduced,and typical high-modulus Mg alloys and Mg matrix composites are ***,Mg alloys enhance Young’s modulus of pure Mg mainly by introducing suitable alloying elements to promote the precipitation of high-modulus second phases in the alloy ***,Mg matrix composites improve Young’s modulus by incorporating high-modulus particles,whiskers and fibers into the Mg *** modulus strengthening effectiveness brought by the two approaches is compared,and Mg matrix composites stand out as a more promising *** addition,two well-accepted modulus prediction models(Halpin-Tsai and Rule of mixtures(ROM))for different Mg matrix composites are *** effects of reinforcement type,size,volume fraction and interfacial bonding condition on the modulus of Mg matrix composites are ***,the existing challenges and development trends of high-modulus Mg-based materials are proposed and prospected.

关键词： Elastic modulus Mg alloy Mg matrix composite Modulus prediction model Mechanical properties

Effect of forging temperature on the microstructures and mechanical properties of the SiC_p/AZ91 magnesium matrix composite

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Acta Metallurgica Sinica(English Letters) 2010年第2期23卷 99-105页

作者： Kun WU Kunkun DENG Hai CHANG Yewei WU xiaoshi hu Mingyi ZHENG School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

In this paper, 10 vol. pct SiCp/AZ91 magnesium matrix composite was fabricated by stir casting technology. The ingots were forged at temperatures of 320, 370 and 420 ℃, respectively. XRD, OM and SEM were used to characterize microstructure of the＇composites. It was shown that the clusters of particles in the as-cast composite were largely eliminated, and that the tensile strength was improved obviously.

关键词： Magnesium matrix composite Forging Mechanical properties

Microstructure and mechanical properties of bio-inspired Cf/Ti/Mg laminated composites

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Journal of Magnesium and Alloys 2018年第2期6卷 164-170页

作者： xiaoshi hu Zhenming Sun Chunlei Zhang Xiaojun Wang Kun Wu School of Materials Science and Engineering Harbin Institute of TechnologyHarbinChina

Inspired by an old fish skin structure,the Cf/Ti/Mg laminated composites were fabricated by squeeze casting *** porous or voids were found in final composite,and carbon fiber was uniformly dispersed in Mg ***,the addition of net-shaped Ti adsorbed Al element and facilitated the nucleation of Mg_(17)Al_(12)nearby *** reaction product Al_(4)C_(3)was found at the Cf and AZ91 *** tests indicate that the introduction of Ti could greatly improve the toughness of Cf/Mg composites.

关键词： Magnesium matrix composites Carbon fiber Laminated composites

A Novel Method to Fabricate CNT/Mg–6Zn Composites with High Strengthening Efficiency

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Acta Metallurgica Sinica(English Letters) 2014年第5期27卷 909-917页

作者： Hailong Shi Xiaojun Wang Chendong Li xiaoshi hu Chao Ding Kun Wu Yudong huang School of Materials Science and Engineering Harbin Institute of Technology School of Chemical Engineering and Technology Harbin Institute of Technology

A novel method was developed to fabricate carbon nanotubes （CNTs）-reinforced Mg matrix composites. The method consists of two steps： CNTs pre-dispersion by ball-milling and the ultrasonic melt processing. Mechanical ball- milling effectively pre-dispersed CNTs on Zn flakes with suitable rotational speed and ball-milling time. Serious CNT entanglements were dispersed by the ball-milling. However, ball-milling for a long time at high speed would damage the morphology of CNTs. The ultrasonic overcame the poor wettability between Mg melt and CNTs and then dispersed pre-dispersed CNTs in the Mg melt. CNTs were distributed well in the composites and maintained integrated structure. CNTs significantly improved the mechanical properties of the matrix. The strengthening efficiency reached to 37.1, which proves the superiority of this novel method. Besides grain refinement, load transfer may make a great contribution to the improvement of the strength for the composites.

关键词： Pre-dispersion Carbon nanotubes Magnesium matrix composites Mechanical properties Ultrasonic vibration