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Nano Research 2025年第1期18卷 164-172页

作者： yuanlin fu Xiaoting Yang Ya yu Kang Zhou Xiaoyang Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen fuqiang Fan yuhang Li yu fu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China Department of Physical Education Shen Yang Institute of Science and TechnologyShenyang 110167China Sungrow Power Supply Co. Ltd.Hefei 230088China

The electrochemical nitrate reduction reaction(eNO_(3)^(-)RR)is considered an effective approach for converting nitrate-containing wastewater to *** adsorption and activation of NO_(3)^(-)is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction *** Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO_(3)^(-)and the resulting Co^(2+)is then reduced by electroreduction to Co^(0),which circulates *** resulted in overcoming the energy input required for NO_(3)^(-)adsorption and conversion,thereby increasing the catalytic *** the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better *** obtained Co(OH)_(2)@Co-N-C has an excellent eNO_(3)^(-)RR of 2774.7μg·h^(-1)·cm^(-2)with a Faraday efficiency of 81.4%in neutral *** the same time,the material-modified electrode can run stably for more than 100 *** work provides a new idea for the design of Co-based catalysts for eNO_(3)^(-)RR.

关键词： electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction

Effect of Chromium-enhanced Diffusivity on Reverted Transformation in Metastable Austenitic Stainless Steels:Theoretical Calculation and Experiment

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Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 451-454页

作者： WANG Tao yu fu Changqing Oilfield Company Oil Prouduction Plant No.8 CNPCChongqing710018China Shanghai Keyan Energy Technology Limited Company Shanghai202150China

Effects of nucleation sites and diffusivity enhancement of chromium on reverted transformation of AISI 304 stainless steel during annealing process were *** calculation revealed that the reverted transformation of strain-inducedα’-martensite→γaustenite could were closely associated with active nucleation sites and diffusivity enhancement of chromium in nanocrystallineα’-*** experimental data and the results were in accordance with 2-grain austenite/α’-martensite junctions calculated theoretically,which could result from high chromium diffusion rate in nanocrystallineα’-*** addition,low temperature is not conducive to reversed transformation,while high temperature and long annealing time will lead to inhomogeneous grain size distribution.

关键词： austenitic stainless steel anneal diffusion phase transformation strain-inducedα′-martensite

On-line spheroidization process of medium-carbon low-alloyed cold heading steel

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International Journal of Minerals,Metallurgy and Materials 2014年第1期21卷 26-35页

作者： yu fu Hao yu Pan Tao School of Materials Science and Engineering University of Science and Technology Beijing

Conventionally manufactured 35CrMo cold heading steel must undergo spheroidization annealing before the cold heading process In this paper, different types of deformation processes with various controlled cooling periods were operated to achieve on-line spheroidal cementite using the Gleeble-3500 simulation technique. According to the measured dynamic ferrite transformation temperature （Ad3）, the deformation could be divided into two types： low temperature deformation at 810 and 780℃; ＂deformation-induced ferrite transformation＂（DIFT） deformation at 750 and 720℃. Compared with the low temperature deformation, the DIFT deformation followed by accelerated cooling to 680℃ is beneficial for the formation of spheroidal cementite. Samples subjected to both the low-temperature deformation and DIFT deformation can obtain granular bainite by accelerated cooling to 640℃; the latter may contribute to the formation of a fine dispersion of secondary constituents. Granular bainite can transform into globular pearlite rapidly during subcritical annealing, and the more the disperse phase, the more homogeneously distributed globular cementite can be obtained.

关键词： steel heat treatment cold heading spheroidization globular cementite subcritical annealing

Role of decay in the search for double-charm baryons

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 27-28页

作者： fu-Sheng yu School of Nuclear Science and Technology Lanzhou University

Double-charm baryons,whose components are two heavy charm quarks and one light quark,are part of a large family of hadrons predicted by the quark *** on them are helpful to understand the hadron structure and the nature of the strong *** efforts expended over decades of searching,experimental measurements achieved a breakthrough with the first observation of the double-charm baryon of■^++cc(ccu)via■^++cc→Λ^+c K^-π^+π^+ by the LHCb collaboration in 2017[1].Since then,the LHCb collaboration has been leading the experimental studies for doubly charmed baryons[2-6]because they are produced in considerably large numbers in the Large Hadron Collider(LHC).

关键词： interaction. quark double

Chow’s Theorem for Semi-abelian Varieties and Bounds for Splitting Fields of Algebraic Tori

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Acta Mathematica Sinica,English Series 2019年第9期35卷 1453-1463页

作者： Chia fu yu Institute of Mathematics Academia Sinica & NCTS Astronomy Mathematics Building

A theorem of Chow concerns homomorphisms of two abelian varieties under a primary field extension base change. In this paper, we generalize Chow’s theorem to semi-abelian *** contributes to different proofs of a well-known result that every algebraic torus splits over a finite separable field extension. We also obtain the best bound for the degrees of splitting fields of tori.

关键词： Algebraic tori splitting fields semi-abelian varieties inverse Galois problem

Modular synthesis of a block copolymer with a cleavable linkage via “click” chemistry

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Science China Chemistry 2010年第5期53卷 1127-1132页

作者： fu, yu Liu, GuoJun Research Centre for Molecular Science and Engineering Northeastern University Shenyang 110004 China Department of Chemistry Queen's University Ontario Canada

A diblock copolymer poly(ethylene glycol)-block-polystyrene or PEG-b-PS with an olefinic double bond at the PEG and PS junction has been prepared by modular synthesis via"click"*** involved the synthesis of PS by atom transfer radical polymerization and the nucleophilic substitution of the terminal bromide group with azide to yield azide-terminated PS. PEG with an alkynyl terminal group was prepared from reacting carboxyl-end-functionalized PEG with 4-hydroxybut-2-enyl prop-2-ynyl succinate,which contained an alkynyl group as well as an olefin *** PS and PEG polymers were linked via the 1,3-dipolar cycloaddition of the end azide and alkyne *** obtained copolymer was characterized by 1H NMR spectroscopy and size exclusion chromatography(SEC).SEC analysis indicated that the diblock copolymer produced could be readily cleaved by ozonolysis to regenerate the constituent homopolymers.

关键词： modular synthesis cleavable block copolymer click chemistry ATRP

Forest type identification by random forest classification combined with SPOT and multitemporal SAR data

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Journal of Forestry Research 2018年第5期29卷 1407-1414页

作者： Ying yu Mingze Li yu fu School of Forestry Northeast Forestry University

We developed a forest type classification technology for the Daxing＇an Mountains of northeast China using multisource remote sensing data.A SPOT-5 image and two temporal images of RADARSAT-2 full-polarization SAR were used to identify forest types in the Pangu Forest Farm of the Daxing＇an *** types were identified using random forest（RF） classification with the following data combination types： SPOT-5 alone,SPOT-5 and SAR images in August or November,and SPOT-5 and two temporal SAR *** identified many forest types using a combination of multitemporal SAR and SPOT-5 images,including Betula platyphylla,Larix gmelinii,Pinus sylvestris and Picea koraiensis *** accuracy of classification exceeded 88% and improved by 12% when compared to the classification results obtained using SPOT data *** classification using a combination of multisource remote sensing data improved classification accuracy compared to that achieved using single-source remote sensing data.

关键词： Random forest classification Multitemporal Multisource remote sensing data Polarization decomposition

Through-Thickness Texture Gradient in Hot-Rolled 25Mn-2.5Si-2Al TWIP Steel

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Journal of Iron and Steel Research International 2013年第4期20卷 46-53页

作者： SU yu LI Lin fu Ren-yu Department of Materials Science and Engineering Shanghai University

Texture is one of the important factors affecting sheet metal forming *** through-thickness texture gradient during the hot-rolling process of twinning induced plasticity（TWIP）steel sheet was investigated using electron backscatter diffraction and X-ray *** increasing reduction of the TWIP steel,the fraction of∑1 decreased,whereas the fractions of∑3,∑9,and∑*** 53%reduction,a similar trend could be found from its surface to the *** gradients of intensities of the fibers decreased with increasing hot-rolling *** intensities of face-centered cubic（fcc）shear textures E and Y were higher in the center than that at the surface for both *** 20% reduction,the intensity of fcc plain strain texture S orientation increased from the center to the surface.

关键词： twinning induced plasticity steel texture grain boundary character twinning

Non-contact optical dynamic measurements at different ranges:a review

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Acta Mechanica Sinica 2021年第4期37卷 537-553,I0001页

作者： yu fu Yang Shang Wenxin Hu Bin Li Qifeng yu Shenzhen Key Laboratory of Intelligent Optical Measurement and Detection Shenzhen UniversityShenzhen 518060China Hunan Provincial Key Laboratory of Image Measurement and Vision Navigation College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China

Optical dynamic measurements are widely used for non-contact vibration,continuous deformation,or moving *** measurement techniques were developed for different deformation *** paper reviews three types of technique for different measurement ranges:interferometric techniques for deformation or vibration(nanometer to submillimeter amplitude)whose measurement accuracies rely on phase extraction of interferometric signal;imaging based techniques for deformation or vibration(micrometer to centimeter amplitude)with the aid of moire,structured light,and man-made speckles,whose sensitivities is from 1/100 to 1/10 pixel;and videometrics for large deformation or movement detection(greater than centimeter amplitude).Many research groups have improved measurement capabilities for these three techniques to meet particular industrial application requirements.

关键词： Vibration measurement Laser interferometry Digital image correlation High-speed imaging Videometrics

First-principle investigation on mechanism of Ca ion activating flotation of spodumene

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Rare Metals 2014年第3期33卷 358-362页

作者： fu-Shun yu yu-Hua Wang Jin-Ming Wang Zhen-fu Xie Lei Zhang School of Minerals Processing and Bioengineering Central South University

Different hypotheses of the activation mechanisms of metallic ions for silicate minerals flotation were stated in this work. Spodumene and Ca ion were taken to illustrate this issue. Flotation test results and diagram of Ca ion species distribution vs pH show that the dominant hydrolyzed species are Ca（OH）？and Ca（OH）2, which is in correspondence with the maximum flotation recovery of spodumene. Density functional theory（DFT） calculation results reveal further that the precipitation of calcium hydroxide on spodumene surface is the effective process to activate the flotation of spodumene.

关键词： Spodumene flotation Ca ion Activationmechanism Density functional theory calculation