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model on L-to H-mode Transition Driven with Lower-Hybrid Wave

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Chinese Physics Letters 1994年第11期11卷 677-680页

作者： qiu xiaoming(x.m.qiu) BAI Lin(L.Bai) Southwestern Institute of Physics P.O.Box 432Chengdu 610041

In this letter,a model for active suppressing tokamak edge turbulence and hence inducing the L-mode to H-mode transition with lower-hybrid wave(LHW)is *** model includes the two contents:(a)The poloidal sheared flow of plasma is generated by the ponderomotive potential and induced magnetization acting on a tokamak plasma resulting from the oscillating electric field of the injected LHW.(b)During the time the LHW is injected into tokamak edge,the edge turbulence and the LHW-generated plasma poloidal flow compete with each other;if the shear of plasma poloidal flow is large enough to suppress the edge turbulence,the confinement will be remarkably improved and hence the system will enter the H operating *** model leads us to find that the threshold LHW power required for edge-turbulence suppression is proportional to A(ω)≡(ω/ωLH)^(2)|(ω/ωLH)^(2)-1|,which enables us to explain the experiment in the JT-60 tokamak with lower-hybrid current drive.

关键词： turbulence hence flow

model on Inducing H-mode by Biased Electrode in Tokamaks

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Chinese Physics Letters 1992年第10期9卷 527-529页

作者： x.m.qiu L.Bai L.B.Ran Southwestern Institute of Physics Chengdu 610041

In this letter,a model on inducing H-mode by biased electrode in tokamaks is put forward,it successfully explains the experiments in CCT,TExTOR,and HL-1 with bias.

关键词： tokamak Tokamak mode

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi xueying Chen Bowen Liu xuliang Lin xueqing qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

Advanced Functional Electromagnetic Shielding materials:A Review Based on micro‑Nano Structure Interface Control of Biomass Cell Walls

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Nano-micro Letters 2025年第1期17卷 98-134页

作者： Yang Shi mingjun Wu Shengbo Ge Jianzhang Li Anoud Saud Alshammari Jing Luo mohammed A.Amin Hua qiu Jinxuan Jiang Yazeed m.Asiri Runzhou Huang Hua Hou Zeinhom m.El‑Bahy Zhanhu Guo Chong Jia Kaimeng xu xiangmeng Chen Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China State Key Laboratory of Efficient Production of Forest Resourced Beijing Forestry UniversityQinghua East Road 35Haidian DistrictBeijing 100083People’s Republic of China Department of Physics Faculty of Sciences‑ArarNorthern Border UniversityArar 91431Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia Shaanxi Key Laboratory of macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products International Joint Research Center for Biomass MaterialsSouthwest Forestry UniversityKunming 650224People’s Republic of China School of Science Henan Agricultural UniversityZhengzhou 450002People’s Republic of China

Research efforts on electromagnetic interference(EmI)shielding materials have begun to converge on green and sustainable biomass *** materials offer numerous advantages such as being lightweight,porous,and *** to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EmI shielding *** concerted efforts on the EmI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EmI shielding *** particular,a more comprehensive study and summary of the factors influencing biomass EmI shielding materials including the pore structure adjustment,preparation process,and micro-control would be *** preparation methods and characteristics of wood,bamboo,cellulose and lignin in EmI shielding field are critically discussed in this paper,and similar biomass EmI materials are summarized and *** composite methods and fillers of various biomass materials were *** paper also highlights the mechanism of EmI shielding as well as existing prospects and challenges for development trends in this field.

关键词： Biomass materials Electromagnetic interference shielding micro-nano structure interface control Conductivity

ELECTROCHEmICAL ImPEDANCE SPECTROSCOPY STUDY OF CORROSION INHIBITION OF mODIFIED LIGNOSULPHONATE FOR CARBON STEEL

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Acta metallurgica Sinica(English Letters) 2005年第4期18卷 519-524页

作者： C.H. Yi x. Q. qiu D.J. Yang H.m. Lou College of Chemical and Energy Engineering South China University of TechnologyGuangzhou 510640 China

The corrosion inhibition for carbon steel in circulating cooling water by modified lignosulphonate has been investigated using electrochemical impedance spectroscopy technique. Results show that the inhibition efficiency of modified lignosulphonate GCL2 is a great improvement on that of lignosulphonate. The maximum inhibition efficiency of GCL2 reaches 99.21% at the concentration of 400mg·L^-1 at 303K. The corrosion inhibition of GCL2 is attributed to forming adsorption film on the metal surface for the electrochemical impedance spectroscopy in GCL2 solution shows more than one ***,results also indicate that it is more efficient in stirring solution than in still solution for GCL2 because the constant of adsorption in stirring solution is much larger than that in still solution. The adsorption of inhibitor GCL2 follows Langmuir＇s adsorption isotherm.

关键词： electrochemical impedance spectroscopy EIS corrosion inhibition modified lignosulphonate

Henig Efficiency in Vector Optimization with Nearly Cone-subconvexlike Set-valued Functions

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Acta mathematicae Applicatae Sinica 2007年第2期23卷 319-328页

作者： qiu-sheng qiu Department of mathematics Zhejiang Normal University Jinhua 321004 China Department of mathematics Shanghai University Shanghai 200436 China

In this paper, we study Henig efficiency in vector optimization with nearly cone-subconvexlike set-valued function. The existence of Henig efficient point is proved and characterization of Henig efficiency is established using the method of Lagrangian multiplier. As an interesting application of the results in this paper, we establish a Lagrange multiplier theorem for super efficiency in vector optimization with nearly conesubconvexlike set-valued function.

关键词： Set-valued function vector optimization Lagrangian multiplier theorem Henig efficiency nearly cone-subconvexlikeness

Corrosion behavior of three Ag–50Cu alloys prepared by different processes in NaCl solutions

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Rare metals 2017年第1期36卷 61-68页

作者： Zhong-qiu Jia qiu-Ying Liang qiu-Yue Tian Zhong-qiu Cao Yan Wang College of Chemistry-and Chemical Engineering Shenyang Normal University Shenyang 110034 China

Corrosion behavior of two nanocrystalline bulk Ag–50Cu alloys and one coarse-grained counterpart prepared by liquid-phase reduction(LPR), mechanical alloying(mA) and powder metallurgy(Pm) methods,respectively, were investigated in Na Cl solutions. They were finished by means of PARm273 A and m5210 electrochemical apparatus through potentiodynamic polarization method and electrochemical impedance spectroscopy(EIS) technique. The results show that corrosion rates of three Ag–50Cu alloys increase with the increment of Na Cl solution concentrations. Corrosion rates of LPRAg–50Cu alloy are a little higher than those of PmAg–50Cu alloy,but evidently lower than those of mAAg–50Cu alloy. The difference in corrosion rates is attributed to the large reduction in the grain size and homogeneous microstructure of nanocrystalline alloys. Passive current densities decrease and afterward increase for PmAg–50Cu alloy,decrease for mAAg–50Cu alloy, and increase for LPRAg–50Cu alloy with the increment of Na Cl solution concentrations. After the grain sizes are refined, passive current densities become lower.

关键词： Copper alloys Corrosion Corrosion rate Corrosive effects Electrochemical corrosion Electrochemical impedance spectroscopy Electrochemistry Grain size and shape mechanical alloying Nanocrystals Powder metallurgy Reduction Silver Silver alloys

Using a Lagrangian model to estimate source regions of particles in sediment traps

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Science China Earth Sciences 2014年第10期57卷 2447-2456页

作者： qiu ZhongFeng A.m.DOGLIOLI F.CARLOTTI School of marine Sciences Nanjing University of Information Science and Technology Aix-marseille Université CNRS IRD LOPB-UMR 6535 Laboratoire d'Océanographie Physique et Biogéochimique OSU/Centre d'Océanologie de MarseilleFrance

A Lagrangian model is used to evaluate source regions of particles collected in the sediment traps at the DYFAmED （Dy namique des Flux Atmospheriques en mediterranee） station by tracking particles backwards from march 1 to August 31, 2001. The analysis suggests that source regions depend on the flow fields, the settling speed of the particles, and the deployment depths of the traps. monthly variation is observed in the distribution patterns of source regions, which is caused by the currents The source regions are located around the traps and up to hundreds of kilometers away. As the settling speed increases with the particle diameters, the distance to the source regions decreases. The vertical flux can be approximately estimated in 1D for the particles with diameters larger than 500 lain. Furthermore, traps moored at various depths at the DYFAmED can collect parti- cles that originated from different regions in the Ligurian Sea.

关键词： Lagrangian sediment trap particle settling speed

LOW TEmPERATURE ALUmINUm FLOATING ELECTROLYSIS IN HEAVY ELECTROLYTE Na_3AlF_6-AlF_3-BaC1_2-NaCl BATH SYSTEm

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Acta metallurgica Sinica(English Letters) 2000年第4期13卷 949-954页

作者： H.m. Lu and K.m. Fang metallurgy School, University of Science and Technology Beijing, Beijing 100083, China Z.x. qiu Department of Nonferrous metallurgy, Northeastern University, Shenyang 110006, China Beijing Univ of Science and Technology Beijing China

multiple regression equations of liquidus temperature, electrical conductivity and bath density of the Na_3AlF_6-AlF_3-BaC1_2-NaCl system were obtained from experiments by using orthogonal regression method. The experiments were carried out in 100A cell with low melting point electrolyte, the influences of cathodic current density, electrolytic temperature, density differences of bath and liquid aluminum on current efficiency (CE) were studied; when the electrolyte cryolite ratio was 2.5, w(BaC1_2) and w(NaCl) were 48% and 10%, respectively, CE reached 90% and specific energy consumption was 10.97k Wb/kg/kg. Because of the fact that aluminum metal obtained floated on the surface of molten electrolyte, this electrolysis method was then defined as low temperature aluminum floating electrolysis. The results showed that the new low temperature aluminum electrolysis process in the Na_3AlF_6-AlF_3-BaC1_2-NaCl bath system was practical and promising.

关键词： low temperature aluminum floating electrolysis Na_3AlF_6- AlF_3BaC1_2-NaCl bath system current efficiency physico-chemical property