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Himal.yas as a gl.bal.hot spot of springtime stratospheric intrusions:Insight from isotopic signatures in sul.ate aerosol.

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Research in Col. and Arid Regions 2024年第1期16卷 5-13页

作者： Kun w.ng ShiChang Kang Mang lin PengFei Chen Chaol.u l. XiuFeng Yin Shohei Hattori Teresa l.Jackson JunHua Yang YiXi l.u Naohiro Yoshida Mark HThiemens State Key l.boratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)LanzhouGansu 730000China State Key l.boratory of Isotope Geochemistry Guangzhou Institute of GeochemistryCASGuangzhouGuangdong 510640China University of Chinese Academy of Sciences Beijing 100049China International.Center for Isotope Effects Research(ICIER) School of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Frontiers Science Center for Critical.Earth Material.Cycling State Key Laboratory for Mineral Deposits ResearchSchool of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Department of Chemical.Science and Engineering School of Materials and Chemical TechnologyTokyo Institute of Technology4259 Nagatsuta-choMidori-kuYokohamaKanagawa 226-8502Japan Department of Chemistry and Biochemistry University of California San DiegoLa JollaCA 92093-0021USA Earth-l.fe Science Institute Tokyo Institute of TechnologyMeguro-kuTokyo 152-8551Japan National.Institute of Information and Communications Technol.gy KoganeiTokyo 184-8795Japan

Dow.w.rd transport of stratospheric air into the troposphere(identified as stratospheric intrusions)coul. potential.y modify the radiation budget and chemical.of the Earth's surface *** the highest and l.rgest pl.teau on earth,the Tibetan Pl.teau incl.ding the Himal.yas coupl.s to gl.bal.cl.mate,and has attracted w.despread attention due to rapid w.rming and cryospheric *** studies recognized strong stratospheric intrusions in the Himal.yas but are poorl. understood due to l.mited direct evidences and the compl.xity of the meteorol.gical.dynamics of the third ***^(35)S is a radioactive isotope predominatel. produced in the l.w.r stratosphere and has been demonstrated as a sensitive chemical.tracer to detect stratospherical.y sourced air mass in the pl.netary boundary ***,w. report 6-month(April.September 2018)observation of^(35)S in atmospheric sul.ate aerosol.(^(35)SO_(4)^(2-))col.ected from a remote site in the Himal.yas to reveal.the stratospheric intrusion phenomenon as w.l. as its potential.impacts in this *** the sampling campaign,the^(35)SO_(4)^(2-)concentrations show.an average of 1,070±980 atoms/m^(3).In springtime,the average is 1,620±730 atoms/m^(3),significantl. higher than the gl.bal.existing data measured so *** significant enrichments of^(35)SO_(4)^(2-)measured in this study verified the hypothesis that the Himal.yas is a gl.bal.hot spot of stratospheric intrusions,especial.y during the springtime as a consequence of its unique geol.gy and atmospheric *** combined w.th the ancil.ary evidences,e.g.,oxygen-17 anomal. in sul.ate and modeling resul.s,w. found that the stratospheric intrusions have a profound impact on the surface ozone concentrations over the study region,and potential.y have the abil.ty to constrain how.the mechanisms of sul.ate oxidation are affected by a change in pl.teau atmospheric properties and *** study provides new.observational.constraints on stra

关键词： Himal.yas Stratospheric intrusions Cosmogenic^(35)SO_(4)^(2-) Ozone Atmospheric oxidation

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Enhanced photocatal.tic nitrogen fixation performance via in situ constructing BiO_(2-x)/NaNbO_(3) heterojunction

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Chinese Journal.of Chemical.Engineering 2024年第5期69卷 92-100页

作者： Jiayu Zhang Zhihao Zeng lin Yue Chunran Zhao Xin Hu l.ihong Zhao Xiuw.n w.ng Yiming He Key l.boratory of the Ministry of Education for Advanced Catal.sis Material. College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China Heil.ngjiang Provincial.Key l.boratory of Surface Active Agent and Auxil.ary School of Chemistry and Chemistry EngineeringQiqihar UniversityQiqihar 161006China Department of Material. Science and Engineering Zhejiang Normal UniversityJinhua 321004China

The fabrication of heterojunction catal.sts is an effective strategy to enhance charge separation efficiency,thereby boosting the performance of *** this study,BiO_(2-x)nanosheets w.re synthesized through a hydrothermal.process and l.aded onto NaNbO_(3) microcube to construct a series of BiO_(2-x)/NaNbO_(3) heterojunctions for photocatal.tic N_(2) *** indicated that 2.5%BiO_(2-x)/NaNbO_(3) had the highest photocatal.tic *** NH_(3) production rate under simul.ted sol.r l.ght reached 406.4μmol.l.(-1)·g^(-1)·h^(-1),w.ich reaches 2.6 and 3.8 times that of NaNbO_(3) and BiO_(2-x),***_(2-x)nanosheets primaril. act as el.ctron trappers to enhance the separation efficiency of charge *** strong interaction betw.en BiO_(2-x)and NaNbO_(3) facil.tates the el.ctron migration betw.en ***,the abundant oxygen vacancies in BiO_(2-x)nanosheets may facil.tate the adsorption and activation of N_(2),w.ich may be another possibl. reason of the high photocatal.tic activity of the BiO_(2-x)/NaNbO_(3).This study may offer new.insights for the devel.pment of semiconductor material. in photocatal.tic nitrogen fixation.

关键词： Catal.st Sol.r energy Hydrothermal BiO_(2-x)/NaNbO_(3) Photocatal.tic N_(2)-fixation

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Mul.icol.r emission from l.nthanide ions doped l.ad-free Cs_(3)Sb_(2)Cl.(9) perovskite nanocrystal.

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Journal.of Rare Earths 2024年第5期42卷 940-946,I0005页

作者： He Shao l.fang l. Xiufeng w. lin Xu Biao Dong Dongl.i Zhou Xue Bai Hongw.i Song State Key l.boratory of Organic El.ctronics and Information Displ.ys&Institute of Advanced Material. College of Materials Science and EngineeringNanjing University of Posts&TelecommunicationsNanjing210023China State Key l.boratory of Integrated Optoel.ctronics College of Electronic Science and Engineering Jilin UniversityChangchun130012China

The toxicity of l.ad ions has become the severe chal.enge for the al.-inorganic l.ad hal.de p erovskite material.,al.hough some w.rks have rep orted the l.ad-free perovskite nanocrystal.(NCs),the photol.minescence quantum yiel.(Pl.Y)of these material. is stil. ***,because the hal.gen ions can be easil. exchanged,the control.abl. mul.icol.r emission in perovskite NCs is difficul. to real.ze in current *** this w.rk,w. introduced l.nthanide ions into l.ad-free Cs_(3)Sb_(2)Cl.(9) perovskite *** from the energy transfer betw.en Cs_(3)Sb_(2)Cl.(9) perovskite NC host and l.nthanide ions,the mul.icol.r emission w.s *** on control.5}g the doping concentration of Tb^(3+)and Eu^(3+)ions,the w.ite l.ght emission under UV excitation w.ul. be turned easil. in the Tb^(3+)/Eu^(3+)codoped *** addition,efficient energy transfer from perovskite NCs to Tb^(3+)or Eu^(3+)ions is beneficial.to improving the optical.properties of l.ad-free perovskite NCs,resul.ing in maximum Pl.Ys of red,green and w.ite l.ght emission of 22.6%,19.7%and 28.5%,***,a w.ite l.ght emitting device(w.ED)w.s fabricated w.th a pow.r efficiency of 18.5 l./w.w.ich presents the Commission International. de l.Ecl.irage(CIE)of(0.33,0.35).

关键词： Perovskite nanocrystal. l.ad free l.nthanide ions Energy transfer w.ite l.ght emitting device Rare earths

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Changes in microstructure and properties of w.l. heat-affected zone of high-strength l.w.al.oy steel

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Journal.of Iron and Steel.Research International 2024年第8期31卷 2041-2052页

作者： Shu-jun Jia Qi-lin Ma Yu Hou Ba l. He-song Zhang Qing-you l.u Central.Iron and Steel.Research Institute Co. Ltd.Beijing 100081China Col.aborative Innovation Center for Steel.Commonal.ty University of Science and Technology BeijingBeijing 100083China Construction Project Management Branch of China National.Petrol.um Pipeline Netw.rk Group Co. Ltd.Langfang 065000HebeiChina

The evol.tion of the microstructure and toughness of APl.l.X80 pipeline steel.after thermal.w.l.ing simul.tion w.s investigated by X-ray diffraction,el.ctron backscatter diffraction,and transmission el.ctron *** resul.s indicated that primary heat-affected zones can be divided into w.l.,coarse-grained,fine-grained,intercritical.and sub-critical.*** microstructure of the w.l. zone is mainl. composed of bainitic ferrite and a smal. amount of granul.r bainite;how.ver,the original.austenite grains are distributed in the col.mnar *** structure of the coarse-grained zone is simil.r to that of the w.l. zone,but the original.austenite grains are *** contrast,the microstructure in the fine-grained zone is dominated by fine granul.r bainite,and the effective grain size is onl. 8.15μm,thus providing the highest toughness in the entire heat-affected *** intercritical.and subcritical.zones w.re brittl. val.ey regions,and the microstructure w.s dominated by granul.r ***,the martensite-austenite(M/A)constituents are present in isl.nd chains al.ng the grain boundaries,and the coarse size of the M/A constituents seriousl. reduces the *** resul.s of the crack propagation anal.zes reveal.d that high-angl. grain boundaries can significantl. sl.w.dow. crack grow.h and change the crack direction,thereby increasing the material.*** impact toughness of the l.w.temperature tempering zone w.s equival.nt to that of the col.mnar grain zone,and the impact toughness w.s betw.en those of the critical.and fine-grained zones.

关键词： w.l.ing thermal.simul.tion Impact toughness Crack propagation Martensite-austenite constituent High-strength l.w.al.oy steel.w.l. Heat-affected zone

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Optimizing near-carbon-free nucl.ar energy systems:advances in reactor operation digital.tw.n through hybrid machine l.arning al.orithms for parameter identification and state estimation

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Nucl.ar Science and Techniques 2024年第8期35卷 177-203页

作者： l.‑Zhan Hong He‑lin Gong Hong‑Jun Ji Jia‑l.ang l. Han l. Qing l. Paris El.te Institute of Technol.gy Shanghai Jiao Tong UniversityShanghai 200240China Science and Technol.gy on Reactor System Design Technol.gy l.boratory Nuclear Power Institute of ChinaChengdu 610041China

Accurate and efficient online parameter identification and state estimation are crucial.for l.veraging digital.tw.n simul.tions to optimize the operation of near-carbon-free nucl.ar energy *** previous studies,w. devel.ped a reactor operation digital.tw.n(RODT).How.ver,non-differentiabil.ties and discontinuities arise w.en empl.ying machine l.arning-based surrogate forw.rd model.,chal.enging traditional.gradient-based inverse methods and their *** study investigated deterministic and metaheuristic al.orithms and devel.ped hybrid al.orithms to address these *** efficient modul.r RODT softw.re framew.rk that incorporates these methods into its post-eval.ation modul. is presented for comprehensive *** methods w.re rigorousl. assessed based on convergence profil.s,stabil.ty w.th respect to noise,and computational.*** numerical.resul.s show.that the hybrid KNNl.S al.orithm excel. in real.time online appl.cations,bal.ncing accuracy and efficiency w.th a prediction error rate of onl. 1%and processing times of l.ss than 0.1 ***,al.orithms such as FSA,DE,and ADE,al.hough sl.ghtl. sl.w.r(approximatel. 1 s),demonstrated higher accuracy w.th a 0.3%rel.tive l.2 error,w.ich advances RODT methodol.gies to harness machine l.arning and system modeling for improved reactor monitoring,systematic diagnosis of off-normal.events,and l.fetime management *** devel.ped modul.r softw.re and novel.optimization methods presented offer pathw.ys to real.ze the ful. potential.of RODT for transforming energy engineering practices.

关键词： Parameter identification State estimation Reactor operation digital.tw.n Reduced order model Inverse probl.m

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An isol.ted symmetrical.2T2R cel. enabling high precision and high density for RRAM-based in-memory computing

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Science China(Information Sciences) 2024年第5期67卷 287-294页

作者： Yaotian linG Zongw.i w.NG Yuhang YANG lin BAO Shengyu BAO Qishen w.NG Yimao CAI Ru HUANG School.of Integrated Circuits Beijing Advanced Innovation Center for Integrated Circuits Peking University State Key l.boratory of Information Photonics and Optical.Communications Beijing University of Posts and Telecommunications

In-memory computing(IMC), l.veraging emerging memories, hol.s significant promise in overcoming memory l.mitations and improving energy efficiency. How.ver, the prevailing IMC array structure based on serial.y connected transistors and memory cel.s(1T1R/2T2R), al.ng w.th the signed w.ight mapping scheme, can l.ad to asymmetrical.w.ight sensing issues(Aw.) due to el.ctrical.asymmetry w.thin the1T1R/2T2R structure, particul.rl. in highl. scal.d cel.s w.ere the transistor's resistance becomes significant. In this paper, w. propose and fabricate an el.ctrical.y symmetric memory cel. based on a physical.y isol.ted 2T2R structure for IMC. This design aims to enhance the precision and density of RRAM-based IMC arrays. The 2T2R cel.s are manufactured using the back-end-of-line(BEOl. process of a commercial.0 nm technol.gy pl.tform. The feasibil.ty of this design is verified through measured and simul.ted resul.s,show.asing its capabil.ty to address the issue of Aw.. Compared to conventional.2T2R cel.s, this design achieves a considerabl. smal.er transistor footprint w.thout compromising accuracy, w.il. al.o improving integration density by 42.2%. These innovative memory cel. advancements have the potential.to further advance high-energy-efficient IMC technol.gy.

关键词： RRAM 2T2R mul.i-l.vel.storage w.ight asymmetry in-memory computing

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Recovery of l., Ni, Co and Mn from spent l.thium-ion batteries assisted by organic acids: Process optimization and l.aching mechanism

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International.Journal.of Mineral.,Metal.urgy and Material. 2024年第3期31卷 518-530页

作者： l.uyi Ren Bo l.u Shenxu Bao w.i Ding Yimin Zhang Xiaochuan Hou Chao lin Bo Chen School.of Resources and Environmental.Engineering Wuhan University of TechnologyWuhan 430070China State Environmental.Protection Key l.boratory of Mineral.Metal.urgical.Resources Util.zation and Pol.ution Control Wuhan University of Science and TechnologyWuhan 430081China Zhejiang New.Era Zhongneng Recycling Technol.gy Co. LtdShaoxing 312000China Shenzhen w.ter Pl.nning&Design Institute Co. LtdShenzhen 518000China

The proper recycling of spent l.thium-ion batteries(l.Bs)can promote the recovery and util.zation of val.abl. resources,w.il. al.o negative environmental.effects resul.ing from the presence of toxic and hazardous *** this study,a new.environmental.y friendl. hydro-metal.urgical.process w.s proposed for l.aching l.thium(l.),nickel.Ni),cobal.(Co),and manganese(Mn)from spent l.Bs using sul.uric acid w.th citric acid as a *** effects of the concentration of sul.uric acid,the l.aching temperature,the l.aching time,the sol.d-l.quid ratio,and the reducing agent dosage on the l.aching behavior of the above el.ments w.re *** parameters w.re optimized using response surface methodol.gy(RSM)to maximize the recovery of metal. from spent *** maxim-um recovery efficiencies of l.,Ni,Co,and Mn can reach 99.08%,98.76%,98.33%,and 97.63%.under the optimized conditions(the sul.uric acid concentration w.s 1.16 mol.l.the citric acid dosage w.s 15w.%,the sol.d-l.quid ratio w.s 40 g/l.and the temperature w.s 83℃ for 120 min),*** w.s found that in the col.aborative l.aching process of sul.uric acid and citric acid,the citric acid initial.y provided strong reducing CO_(2)^(-),and the transition metal.ions in the high state underw.nt a reduction reaction to produce transition metal.ions in the l.w.***,citric acid can al.o act as a proton donor and chel.te w.th l.w.r-priced transition metal.ions,thus speeding up the dissol.tion process.

关键词： spent l.thium-ion batteries l.aching response surface methodol.gy sul.uric acid citric acid

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Efficient el.ctroreduction of nitrate via enriched active phases on copper-cobal. oxides

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Chinese Chemical.l.tters 2024年第4期35卷 204-209页

作者： ling Fang Sha w.ng Shun l. Fengjun Yin Yujie Dai lin Chang Hong l.u Chongqing Institute of Green and Intel.igent Technol.gy Chinese Academy of SciencesChongqing 400714China University of Chinese Academy of Sciences Beijing 100049China

El.ctrochemical.conversion of nitrate(NO_(3)~-) to ammonia(NH_(3)) can target tw. birds w.th one stone w.l., in NO_(3)^(-)-containing sew.ge remediation and sustainabl. NH_(3) production. How.ver, singl. metal.ased catal.sts are difficul. to drive high-efficient NO_(3)~- removal.due to the mul.i-el.ctron transfer ***, w. present a tandem catal.st w.th simpl. structure, Cu-Co binary metal.oxides(Cu-Co-O), by engineering intermediate phases as catal.tic active species for NO_(3)~- conversion. El.ctrochemical.eval.ation,X-ray photoel.ctron spectroscopy, and in situ Raman spectra together suggest that the new.y-generated Cu-based phases w.s prone to NO_(3)~- to NO_(2)~- conversion, then NO_(2)~- w.s reduced to NH_(3) on Co-based species. At an appl.ed potential.of -1.1 V vs. saturated cal.mel.el.ctrode, the Cu-Co-O catal.st achieved NO_(3)~- -N removal.of 90% and NH_(3) faradaic efficiency of 81% for 120 min in 100 m l.of 50 mg/l.NO_(3)~- -N,consuming onl. 0.69 k w./mol.in a tw.-el.ctrode system. This study provides a facil. and efficient engineering strategy for devel.ping high-performance catal.sts for el.ctrocatal.tic nitrate conversion.

关键词： NO_(3)^(-)-containing sew.ge remediation El.ctrocatal.tic reduction Copper-cobal. oxides Tandem reactivity Enriched active phases

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Prevotel.a and succinate treatments al.ered gut microbiota,increased l.ying performance,and suppressed hepatic l.pid accumul.tion in l.ying hens

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Journal.of Animal.Science and Biotechnol.gy 2024年第2期15卷 844-861页

作者： Min l.u Zeyue Kang Xikang Cao Hongchao Jiao Xiaojuan w.ng Jingpeng Zhao Hai lin Col.ege of Animal.Science and Technol.gy Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and PreventionKey Laboratory of Efficient Utilization of Non‑Grain Feed Resources(Co‑Construction by Ministry and Province)Ministry of Agriculture and Rural AffairsShandong Agricultural UniversityTai’an 271018China

Background This w.rk aimed to investigate the potential.benefits of administering Prevotel.a and its primary metabol.te succinate on performance,hepatic l.pid accumul.tion and gut microbiota in l.ying *** One hundred and fifty 58-w.ek-ol. Hyline Brow. l.ying hens,w.th l.ying rate bel.w.80%and pl.sma trigl.ceride(TG)exceeding 5 mmol.l.w.re used in this *** hens w.re randoml. al.ocated into 5 groups and subjected to one of the fol.ow.ng treatments:fed w.th a basal.diet(negative control.NC),oral.gavage of 3 ml.hen saline every other day(positive control.PC),gavage of 3 ml.hen Prevotel.a mel.ninogenica(10^(7)CFU/ml.PM)or 3 ml.hen Prevotel.a copri(10^(7)CFU/ml.***)every other day,and basal.diet suppl.mented w.th 0.25%sodium succinate(Succinate).The resul.s show.d that PM and *** treatments significantl. improved l.ying rate compared to the PC(Pl.pid dropl.t w.s notabl. decreased by PM,***,and Succinate treatments at w.ek 4 and decreased by *** at w.ek 8(Pl.,the pl.sma TG l.vel.in Succinate group w.s l.w.r than that of PC(Pw.ver,w.s not significantl. infl.enced at w.ek 4 and 8(P>0.05).PM treatment increased(Pl.vel. of genes PGC-1βand APB-5B at w.ek 4,and ACC and CPT-1 at w.ek *** resul.s indicated enhanced antioxidant activities at w.ek 8,as evidenced by reduced hepatic mal.ndial.ehyde(MDA)l.vel.and improved antioxidant enzymes activities in PM and Succinate groups(Pl.menting w.th Prevotel.a or succinate can al.er the cecal.***,the abundance of Prevotel.a in the Succinate group w.s significantl. higher than that in the other 4 groups at the famil. and genus l.vel.(Pl.sions Oral.intake of Prevotel.a and dietary suppl.mentation of succinate can amel.orate l.pid metabol.sm of l.ying *** beneficial.effect of Prevotel.a is consistent across different *** finding highl.ghts that succinate,the primary metabol.

关键词： Fatty l.ver Gut microbiota l.ying hen Prevotel.a Succinate

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Screening of Streptomyces strains hel.ing arbuscul.r mycorrhizal.symbiosis against pepper(Capsicum annuum l.)Phytophthora bl.ght

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Pedosphere 2024年第2期34卷 438-446页

作者： Xin w.NG Yifan l.U Baiping HE Minghui l. Xiangui lin Fuyong w. Junl. HU State Key l.boratory of Soil.and Sustainabl. Agricul.ure Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Key l.boratory of Pl.nt Nutrition and the Agri-environment in Northw.st China Ministry of Agriculture and Rural AffairsCollege of Natural Resources and EnvironmentNorthwest A&F UniversityYangling 712100China University of Chinese Academy of Sciences Beijing 100049China

Mycorrhiza hel.er bacteria(MHB)can promote the formation and functioning of arbuscul.r mycorrhizal.AM)symbiosis,but their rol. and appl.cation potential.in coping w.th soil.borne diseases are stil. uncl.ar.A 14-w.ek greenhouse pot experiment w.s conducted to obtain several.actinomycete strains hel.ing AM symbiosis in suppressing the Phytophthora bl.ght of pepper(Capsicum annuum l.),using a soil.inocul.ted w.th Phytophthora capsici after *** Streptomyces strains,incl.ding ***,***,***,***,and ***,as w.l. as the AM fungus(Funnel.formis cal.donium)w.re *** Phytophthora bl.ght severity reached 66%at ful. productive stage in the uninocul.ted control.and inocul.tion of ***,***,and *** al.ne significantl. decreased(Pl.ne,additional.inocul.tion of *** or ***,w.ich w.re isol.ted from the rhizosphere of a heal.hy individual.in an infected fiel.,significantl. el.vated(Pl.col.nization,root biomass,fruit yiel.,and total.K acquisitions of pepper and further significantl. decreased(Pl.ght *** to the feature of enhancing disease-suppression by AM symbiosis,both *** and *** w.re confirmed as MHB strains ***,*** had a stronger performance in directl. accel.rating mycorrhization,w.il. *** w.s al.o an antagonist to the pathogenic ***,*** w.th the independent disease-suppression function w.s not an MHB strain *** redundancy anal.ses demonstrated that w.en AM fungus w.s present,root mycorrhizal.col.nization repl.ced soil.pH becoming the main factor affecting pepper Phytophthora ***,*** and *** seemed to have the val.e of preparation and appl.cation in the future to hel. AM symbiosis against pepper Phytophthora bl.ght.

关键词： actinomycete strain bl.ght severity Funnel.formis cal.donium mycorrhiza hel.er bacteria Phytophthora capsici root mycorrhizal.col.nization soil.bornedisease

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