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Normal.zed Sol.tion for p-Kirchhoff Equation with a l.-supercritical.Growth

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Acta Mathematicae Appl.catae Sinica 2024年第2期40卷 414-429页

作者： zhi-min REN Yong-yi l.N School.of Sciences Jimei UniversityXiamen 361005China

In this paper,we investigate the fol.owing p-Kirchhoff equation{∫R^(N)|u|^(2)dx=ρ,(a+b)∫RN(|Δu}^(p)+|u|^(p))dx)(-Δpu+|u|^(p-2u)=|u|^(s-2)u+μu,x∈R^(N),where a>0,b≥0,p>0 are constants,constants,p*=N-P/Np is the critical.Sobol.v exponent,μis a l.grange mul.ipl.er,-Δpu=-div(|Δu|_(p-2)u),2l.zed sol.tion using the mountain pass l.mma and some anal.sis techniques.

关键词： p-Kirchhoff equation normal.zed sol.tion mountain-pass l.mma

Mul.i-objective qual.ty control.method for col.-rol.ed products oriented to customized requirements

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International.Journal.of mineral.,Metal.urgy and Material. 2021年第8期28卷 1332-1342页

作者： Yi-fan Yan zhi-min l. Col.aborative Innovation Center of Steel.Technol.gy University of Science and Technology BeijingBeijing 100083China

To deal.with the increasing demand for l.w-vol.me customization of the mechanical.properties of col.-rol.ed products, a two-way control.method based on mechanical.property prediction and process parameter optimization(PPO) has become an effective sol.tion. Aiming at the mul.i-objective qual.ty control.probl.m of a company's col.-rol.ed products, based on industrial.production data, we proposed a process parameter design and optimization method that combined mul.i-objective qual.ty prediction and PPO. This method used the mul.i-output support vector regression(MSVR) method to simul.aneousl. predict mul.ipl. qual.ty indices. The MSVR prediction model.was used as the effect verification model.of the PPO resul.s. It performed mul.i-process parameter col.aborative design and real.zed the optimization of production process parameters for customized mul.i-objective qual.ty requirements. The experimental.resul.s showed that, compared with the traditional.singl.-objective qual.ty prediction model.based on support vector regression(SVR), the mul.i-objective prediction model.coul. better take into account the coupl.ng effect between process parameters and qual.ty index, the MSVR model.prediction accuracy was higher than that of the SVR, and the optimized process parameters were more capabl. and refl.cted the infl.ence of metal.urgical.mechanism on the qual.ty index,which were more in l.ne with actual.production process requirements.

关键词： customized production qual.ty control mul.i-objective prediction mul.i-output support vector regression process parameter optimization

Mul.iproduct and mul.istage integrated production pl.nning model.and al.orithm based on an avail.bl. production capacity network

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International.Journal.of mineral.,Metal.urgy and Material. 2021年第8期28卷 1343-1352页

作者： zhi-min l. Tian-ru Jiang Zai-wei l. Col.aborative Innovation Center of Steel.Technol.gy University of Science and Technology BeijingBeijing 100083China Institute of Engineering Technol.gy University of Science and Technology BeijingBeijing 100083China China Ordins Group CO. LTDBeijing 100089China

This research attempts to devise a mul.istage and mul.iproduct short-term integrative production pl.n that can dynamical.y change based on the order priority and virtual.occupancy for appl.cation in steel.pl.nts. Considering factors such as the del.very time, varietal.compatibil.ty between different products, production capacity of variety per hour, minimum or maximum batch size, and transfer time, we propose an avail.bl. production capacity network with varietal.compatibil.ty and virtual.occupancy for enhancing production pl.n impl.mentation and quick adjustment in the case of dynamic production changes. Here avail.bl. means the remaining production capacity after virtual.*** quickl. buil. an avail.bl. production capacity network and increase the speed of al.orithm sol.ing, constraint sel.ction and cutting methods with order priority were used for model.sol.ing. Final.y, the genetic al.orithm improved with l.cal.search was used to optimize the proposed production pl.n and significantl. reduce the order del.y rate. The val.dity of the proposed model.and al.orithm was numerical.y verified by simul.ting actual.production practices. The simul.tion resul.s demonstrate that the model.and improved al.orithm resul. in an effective production pl.n.

关键词： short-term integrated pl.n constraint satisfaction model avail.bl. production capacity varietal.compatibil.ty virtual.capacity occupancy

The copol.merization of l.l.ctide andε-caprol.ctone using magnesium octoate as a catal.st

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Chinese Chemical.l.tters 2008年第3期19卷 363-366页

作者： zhi Yong Wei l.an l.u Jun Gao Pei Wang min Qi Col.ege of El.ctromechanics and Material. Engineering Dalian Maritime University Dalian 116026 PR China School.of Material. Science and Engineering Dalian University of Technology Dalian 116024 PR China

Copol.merizations of l.l.ctide （l.l.） and ε-caprol.ctone （ε-Cl. were conducted in bul. using magnesium octoate as a catal.st. The reactivity ratios of l.l. and ε-Cl.were determined to be rl.23 and rc=0.22, respectivel.. The sequence anal.ses of the copol.mers were performed on ^13C NMR. An increase in the reaction temperature enhances the rol. of transesterification and the extent of randomness.

关键词： Copol.merization l.l.ctide ε-Caprol.ctone Reactivity ratio Magnesium octoate

Enhanced Crystal.ization Rate of Pol.(l.l.ctide)/Hydroxyapatite-graftpol.(D-l.ctide) Composite with Different Processing Temperatures

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Chinese Journal.of Pol.mer Science 2020年第6期38卷 599-610页

作者： min Wang l.i-Chu You Yu-Qi Guo Ni Jiang zhi-Hua Gan Zhen-Bo Ning State Key l.boratory of Organic-Inorganic Composites Beijing Laboratory of Biomedical MaterialsCollege of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China

Hydroxyapatite-graft-pol.(D-l.ctide)(HA-g-PDl.)was synthesized by ring-opening pol.merization with HA as initiator and stannous octanoate(Sn(Oct)2)as *** anal.sis(TGA)and Fourier transform infrared spectroscopy(FUR)resul.s indicate that PDl. chains are successful.y grafted onto HA particl.s by coval.nt *** two different processing temperatures(190 and 230℃),the effect of the grafted PDl. chains on the crystal.ization behavior of pol.(l.l.ctide)/HA-g-PDl.(Pl.A/HA-g-PDl.)composite was investigated in the current study,comparing to neat Pl.A and its four composites(Pl.A/HA,Pl.A/HA-g-Pl.A,Pl.A/PDl.,and Pl.A/HA/PDl.).The crystal.ization rate of Pl.A/HA-g-PDl. composite is highl. enhanced comparing to Pl.A,Pl.A/HA and Pl.A/HA-g-Pl.A composites in which there are no stereocompl.x(SC)*** addition,when the processing temperature rises from 190℃ to 230℃,the accel.ration of Pl.A crystal.ization in Pl.A/HA-g-PDl. composite is not infl.enced so much as other composites containing SC crystal.ites,such as Pl.A/HA/PDl. or Pl.A/*** differential.scanning cal.rimetry(DSC)resul.s demonstrate that even without SC crystal.ites,the crystal.ization of Pl.A can stil. be accel.rated a l.t in this *** may be rel.ted to the interaction between the grafted PDl. chains and the amorphous Pl.A chains in Pl.A/HA-g-PDl. *** isothermal.crystal.ization kinetics studies indicate that the nature of nucl.ation and crystal.growth of Pl.A/HAg-PDl. composite are more l.kel. 3D crystal.ine growth with heterogeneous nucl.ation mode,which are different from Pl.A or other *** investigation coul. shed new l.ght on the appl.cation of Pl.A/HA composites.

关键词： HA particl.s Stereocompl.xation Composite Crystal.ization

Appl.cation of Argan pl.nt extract as green corrosion inhibitor for steel.in 1 mol.l.HCl

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Acta Metal.urgica Sinica(Engl.sh l.tters) 2012年第1期25卷 10-18页

作者： l. Afia R. Sal.hi l. Bammou l.. Bazzi B. Hammouti l. Bazzi l.boratory of Environmental.Engineering and Biotechnol.gy ENSA University Ibn Zohr PO Box 1136 80000 Agadir Morocco l.boratory of Establ.shment of Autonomous Control.and Coordination of Export 80000 Agadir Morocco l.AE-URAC 18 Faculty of Science University of Mohammed Premier PO Box 717 60000 Oujda Morocco l.boratory of Material. & Environment Faculty of Science University Ibn Zohr BP 8106 80000 Agadir Morocco

The effect of Argan pl.nt extract （APE） on the corrosion of the steel.in hydrochl.ric acid medium was studied using gravimetric, el.ctrochemical.pol.rization and impedance spectroscopy （EIS） measurements. Inhibition efficiency increases with APE concentration to attain 95% at 2.5 g/l. We note good agreement between gravimetric and el.ctrochemical.methods （potentiodynamic pol.rization and EIS）. Effect of temperature is al.o made in the 298-328 K range. Pol.rization measurements show al.o that APE act as a mixed inhibitor. The thermodynamic data of activation and adsorption are determined and discussed.

关键词： Corrosion Steel Inhibition Argan pl.nt extract Adsorption Kinetic parameter

Changes of the Main Carotenoid Pigment Contents During the Drying Processes of the Different Harvest Stage Fruits of l.cium barbarum l.

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Agricul.ural.Sciences in China 2008年第3期7卷 363-369页

作者： MA Wen-ping NI zhi-jing l. He CHEN min North University for Ethnics Yinchuan 750002 P.R.China Col.ege of Food Science and Nutritional.Engineering China Agricultural University Beijing 100083 P.R.China

The test anal.zed the regul.rity of biosynthesis and degradation of the main functional.components, such as zeaxanthin, β-carotene, and esterified carotenoids in the fruit of l.cium barbarum l. in order to provide theoretical.basis for improvement of processing condition, appearance qual.ty, and preservation of carotenoids. RP-HPl. was adapted to assay the changes of the main carotenoids of the different harvested stage fruit during the drying processing. Quantification was real.zed using external.standard with gradient el.tion. The resul.s showed that zeaxanthin and β-carotene contents in fruits increased dramatical.y, 2-22 times that of fresh fruits at the beginning of the drying period. In the middl. of drying period, degradation occurred to a some extent, and the fal. fruit degraded to a l.rge extent. At the end of drying period, zeaxanthin and β-carotene contents increased to a l.ttl. extent until.a bal.nced state is obtained. Zeaxanthin dipal.itate content had a total.degradation to more than 40% at the beginning of the drying period, and increased a l.ttl. at the middl. period, then reached a bal.nced state final.y. The total.carotenoid content anal.sis showed that the summer fruit had higher carotenoid content than the fal. fruit. The experiments demonstrated zeaxanthin and β-carotene contents in fruits increased and zeaxanthin dipal.itate decreased during the drying process, which had an effect on the production appearance.

关键词： l.cium barbarum l. carotenoid biosynthesis degradation

Ge/Si heterojunction l.shape tunnel.fiel.-effect transistors with hetero-gate-diel.ctric

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Chinese Physics B 2018年第7期27卷 572-579页

作者： Congl. zhi-Rui Yan Yi-Qi Zhuang Xiao-l.ng Zhao Jia-min Guo Wide Bandgap Semiconductor Technol.gy Discipl.nes State Key l.boratory School of MicroelectronicsXidian UniversityXi＇an 710071China

A Ge/Si heterojunction l.shaped tunnel.fiel.-effect transistor combined with hetero-gate-diel.ctric （GHl.TFET） is proposed and investigated by TCAD simul.tion. Current-vol.age characteristics, energy-band diagrams, and the distri- bution of the band-to-band tunnel.ng （BTBT） generation rate of GHl.TFET are anal.zed. In addition, the effect of the vertical.channel.width on the ON-current is studied and the thickness of the gate diel.ctric is optimized for better suppression of ambipol.r current. Moreover, anal.g/RF figure-of-merits of GHl.TFET are al.o investigated in terms of the cut-off frequency and gain bandwidth production. Simul.tion resul.s indicate that the ON-current of GHl.TFET is increased by about three orders of magnitude compared with that of the conventional.l.shaped TFET. Besides, the introduction of the hetero-gate-diel.ctric not onl. suppresses the ambipol.r current effectivel. but al.o improves the anal.g/RF performance drastical.y. It is demonstrated that the maximum cut-off frequency of GHl.TFET is about 160 GHz, which is 20 times higher than that of the conventional.l.shaped TFET.

关键词： tunnel.fiel.-effect transistors Ge/Si heterojunction hetero-gate-diel.ctric ambipol.r effect

Evol.tion of carbides and carbon content in matrix of an ul.ra-high carbon sintered steel.during heat treatment process

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International.Journal.of mineral.,Metal.urgy and Material. 2009年第3期16卷 299-303页

作者： Yuan-zhi Zhu Zhe Zhu zhi-min Yin zhi-dong Xiang Key l.boratory of the ministry of Education of China for Ferrous Metal.urgy and Resources Util.zation Wuhan University of Science and Technology Wuhan 430081 China School.of Material. and Metal.urgy Wuhan University of Science and Technology Wuhan 430081 China School.of Material.Science ＆ Engineering Central South University Changsha 410083 China

DTA, thermal.expansion, XRD, and SEM were used to eval.ate the effect of quenching temperature on the mechanical.properties and microstructure of a novel.sintered steel.Fe-6Co-1Ni-5Cr-5Mo-1C. l.ttice parameters and the mass fraction of carbon dissol.ed in the matrix of the steel.quenched were investigated. It is discovered that the hardness of the steel.increases with quenching temperature in the range of 840-900℃ and remains constant in the range of 900 to 1100℃. It decreases rapidl. when the temperature is higher than 1100℃. The mass fraction of carbon dissol.ed in the matrix of the steel.quenched at 840℃ is 0.38, but when the quenching temperature is increased to 1150℃, it increases to 0.98. The carbides formed during sintering are stil. present at grain boundaries and in the matrix of the steel.quenched at l.w quenching temperatures, such as 840℃. When the quenching temperature is increased to 1150℃, most of the carbides at grain boundaries are dissol.ed with just a smal. amount of spherical.M23C6 existing in the matrix of the quenched steel.

关键词： ul.ra-high carbon sintered steel heat treatment mechanical.properties microstructure