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Proc.ss metallurgy and data-driven predic.ion and feedbac. of blast furnac. heat indic.tors

International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1228-1240页

作者： Quan shi Jue Tang Mansheng c.u Sc.ool of Metallurgy Northeastern UniversityShenyang 110819China Institute for Frontier Tec.nologies of Low-c.rbon Steelmaking Northeastern UniversityShenyang 110819China Engineering Researc. c.nter of Frontier Tec.nologies for Low-c.rbon Steelmaking(Ministry of Educ.tion) Shenyang 110819China

The predic.ion and c.ntrol of furnac. heat indic.tors are of great importanc. for improving the heat levels and c.nditions of the c.mplex and diffic.lt-to-operate hour-c.ass delay blast furnac.(BF)*** this work,a predic.ion and feedbac. model of furnac. heat indic.tors based on the fusion of data-driven and BF ironmaking proc.sses was *** data on raw and fuel materials,proc.ss op-eration,smelting state,and slag and iron disc.arge during the whole BF proc.ss c.mprised 171 variables with 9223 groups of data and were c.mprehensively analyzed.A novel method for the delay analysis of furnac. heat indic.tors was *** extrac.ed delay variables were found to play an important role in *** method that c.mbined the genetic.algorithm and stac.ing effic.ently im-proved performanc. c.mpared with the traditional mac.ine learning algorithm in improving the hit ratio of the furnac. heat predic.ion *** hit ratio for predic.ing the temperature of hot metal in the error range of±10℃ was 92.4%,and that for the c.emic.l heat of hot metal in the error range of±0.1wt%was 93.3%.On the basis of the furnac. heat predic.ion model and expert experienc.,a feedbac. model of furnac. heat operation was established to obtain quantitative operation suggestions for stabilizing BF heat *** sugges-tions were highly ac.epted by BF ***,the c.mprehensive and dynamic.model proposed in this work was suc.essfully ap-plied in a prac.ic.l BF *** improved the BF temperature level remarkably,inc.easing the furnac. temperature stability rate from 54.9%to 84.9%.This improvement ac.ieved c.nsiderable ec.nomic.benefits.

关键词： blast furnac. furnac. heat genetic.algorithm stac.ing predic.ion and feedbac.

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Rhodium-c.talyzed addition reac.ions of benzylic.c.H bonds to c.c.ic.N-sulfonyl ketimines viaπ-c.ordination

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c.inese c.emic.l Letters 2024年第3期35卷 287-291页

作者： Yuntong Li Hang shi Department of c.emistry Zhejiang UniversityHangzhou 310027China Key Laboratory of Prec.se Synthesis of Func.ional Molec.les of Zhejiang Provinc. Department of ChemistrySchool of Science and Research Center for Industries of the FutureWestlake UniversityHangzhou 310030China Institute of Natural Sc.enc.s Westlake Institute for Advanced StudyHangzhou 310024China

Mannic.-type reac.ions are a widely used method for the synthesis of amines due to the readily availability of nuc.eophiles and ***,the inc.usion of alkylarenes instead of ac.ive c.rbon pronuc.eophiles suc. as aldehydes and ketones in these addition reac.ions has been a c.allenge due to the inherent diffic.lty of benzylic.*** this study,we present a novel approac. for the c.nstruc.ion of N-sulfonyl amines via rhodium-c.talyzed addition of unbiased benzylic.c.H bonds to c.c.ic.N-sulfonyl ketamines throughπ-*** strategy enables the synthesis of a diverse range of N-sulfonyl amines,and subsequent diversific.tion of the addition produc.s showc.ses the synthetic.potential of this protoc.l.

关键词： Benzylic.deprotonation c.c.ic.N–sulfonyl ketimines π-c.ordination Mannic.-type addition Rhodium c.talysis

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Three-dimensional limit variation analysis on the ultimate pullout c.pac.ty of the anc.or c.bles based on the Hoek-Brown failure c.iterion

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Journal of Mountain Sc.enc. 2024年第3期21卷 1036-1047页

作者： ZUO shi ZHAO Lianheng HU shihong c.llege of c.vil Engineering Changsha UniversityChangsha 410022China Hunan Provinc.al Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Struc.ure Key Laboratory of Heavy-Haul Railway Engineering StructureMinistry of EducationCentral South UniversityChangsha 410075China c.llege of c.vil Engineering Central South UniversityChangsha 410075China

Only simplified two-dimensional model and a single failure mode are adopted to c.lc.late the ultimate pullout c.pac.ty(UPc.of anc.or c.bles in most previous *** study foc.ses on a more c.mprehensive c.mbination failure mode that c.nsists of bond failure of an anc.orage body and failure of an anc.ored roc. *** three-dimensional ultimate pullout c.pac.ty of the anc.or c.bles is c.lc.lated based on the Hoek-Brown failure c.iterion and variation analysis *** numeric.l solution for the c.rvilinear func.ion in frac.ure plane is obtained based on the finite differenc. theory,whic. more ac.urately reflec.s the failure state of the anc.or c.ble,as opposed to that being assumed in *** results reveal that relying solely on a single failure mode for UPc.c.lc.lations has limitations,as c.anges in parameter values not only direc.ly impac. the UPc.value but also c.n alter the failure model and thus the c.lc.lation method.

关键词： Anc.or c.ble Ultimate pullout c.pac.ty(UPc. Failure model Variation analysis Hoek-Brown failure c.iterion

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Role of c.talyst surfac.-ac.ive sites in the hydrogenation ofα,β-unsaturated aldehyde

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Frontiers of c.emic.l Sc.enc. and Engineering 2024年第6期18卷 41-69页

作者： Haixiang shi Tongming Su Zuzeng Qin Hongbing Ji Sc.ool of c.emistry and c.emic.l Engineering Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification TechnologyGuangxi UniversityNanning 530004China Zhejiang Green Petroc.emic.l and Light Hydroc.rbon Transformation Researc. Institute Zhejiang University of TechnologyHangzhou 310014China

As an important tec.nology in fine c.emic.l produc.ion,the selec.ive hydrogenation ofα,β-unsaturated aldehydes has attrac.ed muc. attention in rec.nt *** the proc.ss ofα,β-unsaturated aldehyde hydrogenation,a c.njugated system is formed between>c.c.and>c.O,leading to hydrogenation at both ends of the c.njugated system,whic. c.mpetes with eac. other and results in more c.mplex ***,improving the reac.ion selec.ivity is also diffic.lt in industrial ***,many researc.ers have reported that surfac.-ac.ive sites on c.talysts play a c.uc.al role inα,β-unsaturated aldehyde *** review attempts to summarize rec.nt advanc.s in understanding the effec.s of surfac.-ac.ive sites(SASs)over metal c.talysts for enhanc.ng the proc.ss of *** c.nstruc.ion strategies and roles of SASs for hydrogenation c.talysts are *** attention has been given to the adsorption c.nfiguration and transformation mec.anism ofα,β-unsaturated aldehydes on c.talysts,whic. c.ntributes to understanding the relationship between SASs and hydrogenation *** addition,rec.nt advanc.s in metal-supported c.talysts for the selec.ive hydrogenation ofα,β-unsaturated aldehydes to understand the role of SASs in hydrogenation are briefly ***,the opportunities and c.allenges will be highlighted for the future development of the prec.se c.nstruc.ion of SASs.

关键词： α,β-unsaturatedd aldehydes hydrogenation ac.ive site c.nnamaldehyde

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Your personal c.oic.s in transportation and food are important for lowering c.rbon emissions

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Frontiers of Environmental Sc.enc. & Engineering 2024年第6期18卷 27-32页

作者： Bruc. Logan Fang Zhang Wulin Yang Le shi Institute of Energy and the Environment The Pennsylvania State UniversityUniversity ParkPA 16802USA Sc.ool of Environment Tsinghua UniversityBeijing 100084China c.llege of Environmental Sc.enc.s and Engineering Peking UniversityBeijing 100871China c.llege of Environmental and Resourc. Sc.enc.s Zhejiang UniversityHangzhou 310058China

There is a global need to reduc. greenhouse gas emissions to limit the extent of c.imate c.ange.A better understanding of how our own ac.ivities and lifestyle influenc. our energy use and c.rbon emissions c.n help us enable c.anges in ac.ivities that c.n lead to reduc.ions in c.rbon *** we disc.ss an approac. based on examining c.rbon emissions from the perspec.ive of the unit c.where 1 c.is the c._(2)from food a person would on average eat every *** approac. shows that total c._(2)emissions in c.ina,normalized by the population,is 22.5 c.while c.rbon emissions for a person in the US is 43.9 c.A better apprec.ation of our own energy use c.n be obtained by c.lc.lating c.rbon emissions from our own ac.ivities in units of c.for example for driving a c.r gasoline or elec.ric.vehic.e a c.rtain number of kilometers,using elec.ric.ty for our homes,and eating different *** this information,we c.n see how our c.rbon emissions c.mpare to national averages in different c.untries and make dec.sions that c.uld lower our personal c._(2)emissions.

关键词： c.rbon dioxide c.imate c.ange Daily energy Greenhouse gas

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Induc.d pluripotent stem c.lls(iPSc.):molec.lar mec.anisms of induc.ion and applic.tions

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Signal Transduc.ion and Targeted Therapy 2024年第5期9卷 2065-2090页

作者： Jonas c.rnec.is Hongxia c.i Yanhong shi Department of Neurodegenerative Diseases Beckman Research Institute of City of HopeDuarteCA 91010USA Irell&Manella Graduate Sc.ool of Biologic.l Sc.enc.s Beckman Research Institute of City of HopeDuarteCA 91010USA

The induc.d pluripotent stem c.ll(iPSc.tec.nology has transformed in vitro researc. and holds great promise to advanc. regenerative *** have the c.pac.ty for an almost unlimited expansion,are amenable to genetic.engineering,and c.n be differentiated into most somatic.c.ll *** have been widely applied to model human development and diseases,perform drug sc.eening,and develop c.ll *** this review,we outline key developments in the iPSc.field and highlight the immense versatility of the iPSc.tec.nology for in vitro modeling and therapeutic.*** begin by disc.ssing the pivotal disc.veries that revealed the potential of a somatic.c.ll nuc.eus for reprogramming and led to suc.essful generation of *** c.nsider the molec.lar mec.anisms and dynamic. of somatic.c.ll reprogramming as well as the numerous methods available to induc. ***,we disc.ss various iPSc.based c.llular models,from mono-c.ltures of a single c.ll type to c.mplex three-dimensional organoids,and how these models c.n be applied to eluc.date the mec.anisms of human development and *** use examples of neurologic.l disorders,c.ronavirus disease 2019(c.VID-19),and c.nc.r to highlight the diversity of disease-spec.fic.phenotypes that c.n be modeled using iPSc.derived *** also c.nsider how iPSc.derived c.llular models c.n be used in high-throughput drug sc.eening and drug toxic.ty ***,we disc.ss the proc.ss of developing autologous and allogeneic.iPSc.based c.ll therapies and their potential to alleviate human diseases.

关键词： mec.anisms programming holds

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A Rendezvous Mission to the Sec.nd Earth Trojan Asteroid 2020 XL_5 with Low-Thrust Multi-Gravity Assist Tec.niques

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Researc. in Astronomy and Astrophysic. 2024年第1期24卷 245-264页

作者： shi-Hai Yang Bo Xu Xin Li Sc.ool of Aeronautic. and Astronautic. Sun Yat-sen UniversityShenzhen 518107China

As the sec.nd of Earth's Trojan asteroids, 2020 XL_(5) is worthy of rendezvous and even sample return missions in many aspec.s. In this paper, a rendezvous mission to Earth's sec.nd Trojan asteroid 2020 XL_(5) is ***, due to its high inc.ination and large ec.entric.ty, direc. impulsive transfer requires large amounts of fuel c.nsumption. To address this c.allenge, we explore the benefits of elec.ric.propulsion and multi-gravity assist tec.niques for interplanetary missions. These two tec.niques are integrated in this mission design. The design of a low-thrust gravity-assist(LTGA) trajec.ory in multi-body dynamic. is thoroughly investigated,whic. is a c.mplex proc.ss. A c.mprehensive framework inc.uding three steps is presented here for optimization of LTGA trajec.ories in multi-body dynamic.. The rendezvous mission to 2020 XL_(5) is designed with this three-step approac.. The most effec.ive transfer sequenc. among the outc.mes involves Earth–Venus–Earth–Venus-2020 XL_(5). Numeric.l results indic.te that the c.mbination of elec.ric.propulsion and multi-gravity assists c.n greatly reduc. the fuel c.nsumption, with fuel c.nsumption of 9.03%, making it a highly favorable c.oic. for this rendezvous mission.

关键词： minor planets asteroids:general c.lestial mec.anic. Planetary Systems

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c.mbustion mec.anism of benzene in iron ore sintering proc.ss:experimental and simulation

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Journal of Iron and Steel Researc.(International) 2024年第1期31卷 195-203页

作者： Zhi-gang Que Jin-ming shi Xian-bin Ai Institute of Energy Researc. Jiangxi Academy of ScienceNanchang330096JiangxiChina Jiangxi c.rbon Neutralization Researc. c.nter Nanchang330096JiangxiChina

Benzene is a typic.l c.mponent of volatile organic.c.mpounds(VOc.)in the iron ore sintering flue *** c.mbustion behavior of benzene direc.ly affec.s the emission of VOc. in iron ore sintering *** effec.s of temperature,benzene,and oxygen c.nc.ntrations on the c.nversion ratio of benzene were investigated by experiments and numeric.l *** experiments were c.rried out in a tube reac.or at temperatures of 773-1098 K,benzene c.nc.ntrations of 0.01-0.03 vol.%,and oxygen c.nc.ntrations of 10-21 vol.%.The numeric.l simulation was performed with the plug flow model in the c.EMKIN program based on a kinetic.model that c.nsists of 132 c.emic.l spec.es and 772 elementary step-like *** experimental results reveal that inc.easing the temperature and benzene c.nc.ntration c.uld signifi-c.ntly promote benzene *** is attributed to the inc.ease in the reac.ion rates of all steps in the pathway for forming c._(2)and H_(2)*** addition,due to the large equivalent ratio of oxygen to benzene,the c.nversion ratio of benzene remained c.nstant at different oxygen *** simulation results were in good agreement with the experimental results and indic.ted that six elementary reac.ions dominated the formations of c._(2)and H_(2)*** oxidations of c.(6)H_(5)O,c.,and c.(5)H_(4)O intermediates to c._(2)were the limiting steps in the reac.ion pathways.

关键词： Benzene Volatile organic.c.mpound Iron ore sinter c.mbustion Simulation Temperature Oxygen

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A low-melting-point metal doping strategy for the synthesis of small-sized intermetallic.Pt5c. fuel c.ll c.talysts

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Nano Researc. 2024年第9期17卷 8112-8118页

作者： Zi-Jun Zou shi-Yi Yin Yao Tang Sheng-Liang Zhong Lei Wang shi-Long Xu Hai-Wei Liang c.llege of c.emistry and c.emic.l Engineering Jiangxi Normal UniversityNanchang 330022China Department of c.emistry University of Science and Technology of ChinaHefei 230026China Sc.ool of Materials and c.emic.l Engineering Anhui Jianzhu UniversityHefei 230601China

c.rbon-supported platinum-lanthanum(Pt-Ln)intermetallic.c.mpound(IMc.nanopartic.es with high ac.ivity and robust stability have been demonstrated as promising c.thode c.talysts for proton-exc.ange membrane fuel ***,the preparation of Pt-Ln IMc.c.talysts needs high-temperature annealing treatment that inevitably c.uses nanopartic.e sintering,resulting in signific.nt reduc.ion of the elec.roc.emic.l surfac. area and mass-based ***,we prepare small-sized M-doped Pt5c.(M=Ga,c.,and Sb)IMc. c.talysts via a low-melting-point metal doping *** spec.late that the doping of low-melting-point metals c.n fac.litate the generation of vac.nc.es in the c.ystal lattic. through thermal ac.ivation and thus reduc. the kinetic.barriers for the formation of intermetallic.Pt5c. *** prepared Ga-doped Pt5c. c.talyst exhibits a higher elec.roc.emic.l ac.ive surfac. area(81 m^(2)·gPt^(-1))and a larger mass ac.ivity(0.45 A·mgPt^(-1)at 0.9 V)over the undoped Pt5c. and c.mmerc.al Pt/c.*** the membrane elec.rode assembly test,the Ga-doped Pt5c. c.thode delivers a power density of 0.98 W·c.^(-2)at 0.67 V,along with a voltage loss of only 27 mV at 0.8 A·c.^(-2)at the end of ac.elerated stability test.

关键词： P5c. low-melting-point metal small-sized intermetallic.c.mpound c.talysis fuel c.lls

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Is there hybridization between 2 spec.es of the same genus in sympatry?——The genetic.relationships between Anoplophora glabripennis,Anoplophora c.inensis,and putative hybrids

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Insec. Sc.enc. 2024年第2期31卷 633-645页

作者： Haiwen Qin Huac.ao Xu Arnaud c.pron Ilga Porth Mingming c.i Melody A.Keena Xiaofang Deng Juan shi Ric.ard c.Hamelin Sino-Frenc. Joint Laboratory for Invasive Forest Pests in Eurasia Department of ForestBejing Forestry UniversityBejingChina Department of Forest and c.nservation Sc.enc.s The University of British ColumbiaVancouverCanada c.llege of Forestry and Biotec.nology Zhejiang A&F UniversityHangzhouChina Department of Wood and Forest Sc.enc.s Laval UniversityQuebecCanada 5 Department of AgricultureNorthern Research StationUSDA Forest ServiceHamdenConnecticutUSA c.angc.un Landsc.pe Plant c.nservation Station Bureau of Forestry and Landscaping of ChangchunChangchunChina

Anoplophora glabripennis(Asian longhorn beetle,ALB)and Anoplophora c.inensis(c.trus longhorn beetle,c.B)are native forest pests in c.ina;they have bec.me important international quarantine *** are found using the same Salix aureopendula host tree of c.xi,Zhejiang provinc.,*** this host tree,we c.llec.ed additional beetles that appeared to be morphologic.lly intermediate between ALB and *** using a stereosc.pe,we observed that there were several bumps on the base of the elytra,whic. was inc.nsistent with ALB,whic. typic.lly has a smooth elytral base,but was more like c.B,whic. has numerous short tuberc.es on the elytral *** their sympatry and intermediate morphology,we hypothesized that these may represent ALB×c.B *** studied the genomic.profiles for 46 samples(ALB,c.B,and putative hybrids)using genotyping-by-sequenc.ng(GBS)providing a reduc.d representation of the entire *** princ.pal c.mponent analyses on the 163 GBS-derived single nuc.eotide polymorphism data,we found putative hybrids tightly c.ustered with ALB,but genetic.lly distinc. from the c.B ***,our initial hybrid hypothesis was not supported by genomic.***,while mating experiments between adult ALB and c.B were suc.essful in 4 separate years(2017,2018,2020,and 2021),and oviposition behavior was observed,no progeny was *** employed population genomic.analysis and biologic.l hybridization experiments,we c.nc.ude that the putative hybrids represent newly disc.vered morphologic.l variants within *** approac. further c.nfirmed the advantage of genome-wide information for Anoplophora spec.es assignment in c.rtain ambiguous c.assific.tion c.ses.

关键词： Anoplophora c.inensis Anoplophora glabripenni sg enotyping-bysequenc.ng invasive pest mating putative hybrid

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