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Effect of pre-deformation on microstructure and mechanical properties of WE43 magnesium alloy II: Aging at 250 and 300℃

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Journal of Magnesium and Alloys 2020年第1期8卷 103-110页

作者： Y.h.Kang z.h.huang S.C.Wang h.Yan R.S.Chen J.C.huang Guangdong-hong Kong Joint Research and Development Center on Advanced Manufacturing Technology for Light Alloys Guangdong Institute of Materials and ProcessingGuangzhou 510650China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016China hong Kong Institute for Advanced Study Department of Materials Science and EngineeringCity University of Hong KongHong KongChina

In this work,the microstructural evolution and mechanical properties of a pre-deformed WE43 magnesium alloy when aged at 250 and 300℃ were further *** is found that the abundant deformation twins introduced by pre-deformation were maintained within the alloy during the aging *** particles formed at the twin boundaries and coarsened with aging time,especially at 300℃.When peak-aged at 250℃,the fine metastable β'''and β' precipitates formed in the un-deformed alloy have been transformed into relatively large β1 and β precipitates by the *** peak-aged at 300℃,the pre-deformation obviously refined the β *** properties indicate that pre-deformation can increase the yield strength by 19MPa and 54MPa for the peak-aged alloy at 250℃ and 300℃,respectively,and will not obviously deteriorate the tensile elongations.

关键词： WE43 magnesium alloy Pre-deformation Aging Microstructure Mechanical properties

Luminescence properties and energy transfer of Ce3+/Tb3+ co-doped Ca9La(PO4)5(SiO4)F2 phosphor

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Luminescence properties and energy transfer of Ce3+/Tb3+ co-...

第二届海峡两岸功能材料科技与产业峰会（2015）

作者： Y.Y.zhang L.F.Mei z.h.huang School of Materials Sciences and Technology China University of Geosciences

Emission-tunable phosphors CaLa(PO)(SiO)F:Ce,Tb with apatite structure were synthesized by a solid-state *** phase structure,photoluminescence(PL)properties,lifetimes and the PL thermal stability were investigated,***...

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Dynamic risk management practice of construction for the long-distance and largest-diameter tunnel

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Dynamic risk management practice of construction for the lon...

作者： z.h.huang,X.L.Peng & W.Fang Shanghai Changjiang River Tunnel & Bridge Construction Company,Shanghai,P.R.China

This paper describes the construction of Shanghai Yangtze River Tunnel with its background, and discusses the difficulties of construction management of long-distance and large-diameter *** risk management is introduced to the tunnel construction management,to eliminate or reduce the relative risk resources,by risk analysis and *** aims to track the risk continuously,adopt various management methods consisting of monitoring and management of TBM,the-third-party monitoring,shift management, construction consultants,construction monitoring by telecommunication,rule construction in *** the construction of long-distance and large-diameter tunnel as example,it tells how to predicate and control risks by using dynamic risk management is introduced.

关键词： Tunnel Dynamic risk management practice of construction for the long-distance and largest-diameter tunnel

Synthesis of 2D Porous h-BN Material by Molten Salt Method for CO2 Adsorption

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Synthesis of 2D Porous h-BN Material by Molten Salt Method f...

第二届全国光电材料与器件学术研讨会

作者： S.W.Li X.h.zeng h.Chen X.he W.Fang W.X.Li z.h.huang L.zhao The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science & Technology

2D porous h-BN material is one of the potential CO adsorption materials due to its high specific surface area and unique pore *** molten salt method has a faster diffusion and migration rate,which can reduce the synthesis temperature,shorten the reaction time,and increase the specific surface area and structural defects of ***,2D porous h-BN material with a two-dimensional interlaced sponge-like porous structure was synthesized at 1000℃by using magnesium chloride(MgCl) as molten salt.

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Growth of Vertically Aligned BN Nanosheets via Ni-catalyzed Thermal Chemical Vapor Deposition

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Growth of Vertically Aligned BN Nanosheets via Ni-catalyzed ...

第二届全国光电材料与器件学术研讨会

作者： X.h.zeng S.W.Li h.Chen X.he W.Fang W.X.Li z.h.huang L.zhao The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science & Technology

hexagonal boron nitride (h-BN) nanosheets (BNNS) have been demonstrated potential applications for ultraviolet nanoelectronics,catalyst supports,electron field emission,and selfcleaning coatings,***,its wide spread application is retarded by the difficulty in scalable preparation under conventional preparation ***,we report the synthesis of vertically aligned hexagonal BNNS by Ni-catalyzed thermal chemical vapor deposition(CVD) method under ammonia gas flow at 1200℃via catalytic pyrolysis of inorganic hybrid precursor.

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Analysis on influence of conicity of extra-large diameter mixed shield machine on surface settlement

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Analysis on influence of conicity of extra-large diameter mi...

作者： Q.Q.Ji,z.h.huang & X.L.Peng Shanghai Changjiang Tunnel & Bridge Development Co.,Ltd.,Shanghai,P.R.China

Mixed shield machine with conicity is adopted in the Shanghai Yangtze River Tunnel Project. Few of the similar projects used this type of machine in soft *** article is based on the construction of the surface area of west tunnel of the Shanghai Yangtze River Tunnel ***-dimensional finite element model is built to investigate the influences of four types of construction conditions on surface settlement during TBM *** results obtained from numerical simulation are compared to the monitoring surface settlement gained from the field *** relationship between conicity of TBM and surface settlement is then *** experience may be offered to the similar project in soft clay later.

关键词： Analysis on influence of conicity of extra-large diameter mixed shield machine on surface settlement Tunnel

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/CdS heterojunction with photothermal effect for efficient photocatalytic hydrogen production

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Journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.Y.huang z.Yang S.Y.Yang z.h.Dai Y.J.Liu J.h.Liao G.Y.zhong z.J.Xie Y.P.Fang S.S.zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/CdS heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)CdS nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of CdS *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure heterostructure Photothermal effect Photocatalyst hydrogen evolution

Rational design of AgGaS/znS/znS quantum dots with a near-unity photoluminescence quantum yield via double shelling scheme

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Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： h.X.Lu h.Liu z.z.Fu Y.Y.Chen h.Q.Dai z.hu W.L.zhang R.Q.Guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China Yiwu Research Institute of Fudan University YiwuZhejiang 322000China zhongshan-Fudan Joint Innovation Center Zhongshan 528437China

In this study,a two-step method was used to synthesize highly luminescent AgGaS/znS/znS quantum dots(QDs).In the first step,an inner znS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer znS shell,thereby facilitating the formation of a thick outer *** the two-step shelling process,the synthesized AgGaS/znS/znS QDs showed an excellent photoluminescence quantum yield(PLQY)of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLQY reported thus far for AgGaS ***,the effect of halogen ions in zn precursors on the shelling process was *** was proposed that the capacity of halogen ions to coordinate with the QDs influenced the balance between zn cation diffusion and znS shelling ***,the znS shelling reaction was dominant when znCl_(2)was employed,while zn cation diffusion was the dominant process under the I^(−)-rich *** work provides insights into the interfacial restructuring during the znS shelling and offers a clear map for the tailored synthesis of core/shell QDs.

关键词： AgGaS Quantum dots Photoluminescence Core/shell Alloyed core/shell interface

Granger causal representation learning for groups of time series

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Science China(Information Sciences) 2024年第5期67卷 56-68页

作者： Ruichu CAI Yunjin WU Xiaokai huang Wei ChEN Tom z.J.FU zhifeng hAO School of Computer Science Guangdong University of Technology Peng Cheng Laboratory College of Science Shantou University

Discovering causality from multivariate time series is an important but challenging *** existing methods focus on estimating the Granger causal structures among multivariate time series,while ignoring the prior knowledge of these time series, e.g., the group of the time series. Focusing on discovering the Granger causal structures among groups of time series, we propose a Granger causal representation learning method to solve this problem. First, we use the multiset canonical correlation analysis method to learn the Granger causal representation of each group of time series. Then, we model the Granger causal relationships among the learned Granger causal representations using a recurrent neural network with temporal information. Finally, we formulate the above two stages into one unified optimization problem, which is efficiently solved using the augmented Lagrangian method. We conduct extensive experiments on synthetic and real-world datasets to validate the correctness and effectiveness of the proposed method.

关键词： Granger causal discovery Granger causal representation learning time series data recurrent neural network multiset canonical correlation analysis