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cyclicity of the Lower Buntsandstein in the eastern part of the central European Basin:im.lications for Early Triassic palaeogeography and for geochronological calibration

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Journal of Palaeogeography 2024年第2期13卷 252-292页

作者： anna Becker Polish Geological Institute-National Research Institute 4 Rakowiecka str.00-975 WarsawPoland

Lower Buntsandstein sm.ll—scale cycles recognized in the central European Basin(cEB) are readily used for astrochronological calibration of the Early Triassic tim. scales,although they are not well studied *** borehole sections from.the eastern part of the cEB,form.ng a south-north transect perpendicular to the basin axis,were studied in term. to better understand the depositional history of the Lower Buntsandstein developed as the Baltic Form.tion in the studied Polish part of the *** sedim.ntary facies were recognized,based on lithological and sedim.ntological investigations of 655.7 m.of drill cores from.the Otyń IG 1,Gorzów Wielkopolski IG 1 and Kam.eń Pom.rski IG 1 *** facies can be grouped according to a lithological criterion into facies of predom.nantly siliciclastic lithology(including 9facies types) and facies of predom.nantly carbonate lithology(including 2 facies types).Facies analysis allowed to distinguish 8 facies associations of:1) alluvial fan,2) playa,3) sandy-m.ddy coastal plain,4)em.aym.nt and distal delta,5) lagoon,6) sand bars or shoals,7) ooidal shoals or bars,and 8) ***-upward(Dc) and shallowing-upward(Sc) sedim.ntary cycles were recognized in parts of the Baltic Form.tion,with Dcs dom.nating in the southernm.st located Otyń IG 1,and Scs dom.nating in Gorz ow Wielkopolski IG 1,located in the axial part of the *** cycles are very *** statistical significance of the sedim.ntary cycles is relatively low according to m.rkov-chain analysis conducted with the phpSedistat software of Stanova et al.(2009).Analysis of sm.ll—scale cycles perform.d on well logs of investigated boreholes and additional boreholes in the vicinity of Otyń IG 1,im.lem.nting the earlier study of Becker(2005),showed that the correlation of well-log cycles(GR cycles) and sedim.ntary cycles is not *** cycles can be roughly correlated with lithological carbonate—siliciclastic cycles(c-s cycles),refle

关键词： Triassic Lower Buntsandstein cyclicity central European Basin

Regulating m.lting Process in the Energy Storage of Solid-Liquid Pcm.based on Double m.T-LBm.Sim.lation

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Journal of Therm.l Science 2024年第5期33卷 1688-1700页

作者： cheN Weiqi SONG Zhichao QUAN Dongliang he Yurong School of Energy Science&Engineering Harbin Institute of TechnologyHarbin 150001China heilongjiang Key Laboratory of New Energy Storage m.terials and Processes Harbin 150001China Zhengzhou Research Institute of Harbin Institute of Technology Zhengzhou 450000China Innovation&Research Institute of Hiwing Technology Academ. Beijing 100074China

The m.lting process of solid-liquid phase change m.terials(Pcm.has a significant im.act on their energy storage *** m.re effectively apply solid-liquid Pcm.for energy storage,it is crucial to study the regulation of m.lting process of solid-liquid Pcm.which is num.rically investigated based on double m.ltiple relaxation tim. lattice Boltzm.nn m.thod(m.T-LBm.in this *** this work we pay m.re attention to the effects of different Stefan num.ers(Ste)and Rayleigh num.ers(Ra)on the m.lting *** results indicate that the Pcm.m.lting is greatly influenced by the Ste num.er and Ra num.er,which can be divided into the heat conduction dom.nant stage and the convection dom.nant stage,according to the onset tim. of convection Fo_(c).In order to describe the contribution of the heat conduction dom.nant stage to the whole m.lting process quantitatively,we firstly propose the ratio of the heat conduction dom.nant stage R_(pc),which can be defined as the ratio of Fo_(c)to the com.lete m.lting tim. Fo_(m..R_(pc)gradually decreases as the Ra num.er increases,and when the Ste num.er rises:R_(pc)=90.0%when Ste=1.0 and Ra=1×10^(5),R_(pc)=39.6%when Ste=0.1 and Ra=1×10^(5),and R_(pc)=14.0%when Ste=1.0 and Ra=1×10~7.A regim. m.p about the effects of different Ste num.ers and Ra num.ers on R_(pc)has been further *** discovered findings would be helpful in regulating m.lting process in the energy storage of solid-liquid Pcm.

关键词： latent therm.l energy storage solid-liquid phase change double m.T-LBm dom.nant m.lting m.chanism

Gravitational wave footprints from.Higgs-portal scalegenesis with m.ltiple dark chiral scalars

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chinese Physics c 2024年第4期48卷 209-221页

作者： he-Xu Zhang Shinya m.tsuzaki Hiroyuki Ishida center for Theoretical Physics and college of Physics Jilin UniversityChangchun 130012China center for Liberal Arts and Sciences Toyama Prefectural UniversityToyama 939-0398Japan

We discuss the gravitational wave(GW)spectra predicted from.the electroweak scalegenesis of the Higgs portal type with a large num.er of dark chiral flavors,which m.ny flavor QcD would underlie and give the dynam.cal explanation of the negative Higgs portal coupling required to trigger the electroweak sym.etry *** em.loy the linear-sigm. m.del as the low-energy description of dark m.ny flavor QcD and show that the m.del undergoes ultra-supercooling due to the produced strong first-order therm.l phase transition along the(approxim.tely realized)flat direction based on the Gildener-Weinberg *** through evaluation of the bubble nucleation/percolation,we address the reheating and relaxation processes,which are generically non-therm.l and *** the reheating epoch in term. of the e-folding num.er,we propose proper form.lae for the redshift effects on the GW frequencies and signal *** then turns out that the ultra-supercooling predicted from.the Higgs-portal scalegenesis generically yields none of GW signals with the frequencies as low as nano Hz,unless the released latent heat is transported into another sector other than reheating the ***,m.dels of this class prefer to give the higher frequency signals and still keeps the future prospected detection sensitivity,like at LISA,BBO,and DEcIGO,*** also find that with large flavors in the dark sector,the GW signals are m.de further sm.ller and the peak frequencies *** phenom.nological consequences related to the m.ltiple chiral scalars include the prediction of dark pions with the m.ss m.ch less than TeV scale,which is also briefly addressed.

关键词： gravitational wave electroweak scalegenesis m.ny flavor QcD

carbon allocation in Picea jezoensis:Adaptation strategies of a non-treeline species at its upper elevation lim.t

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Forest Ecosystem. 2024年第3期11卷 347-357页

作者： Renkai Dong Na Li m.i-he Li Yu cong Haibo Du Decai Gao Hong S.he Key Laboratory of Geographical Processes and Ecological Security in changbai m.untains Ministry of EducationSchool of Geographical SciencesNortheast Normal UniversityChangchun130024China School of Natural Resources University of MissouriColumbiaMO65211USA Swiss Federal Institute for Forest Snow and Landscape Research WSL8903BirmensdorfSwitzerland Northeast Institute of Geography and Agricultural Ecology Chinese Academy of SciencesChangchun130102China School of Life Science Hebei UniversityBaoding071002China

Understanding the physiological adaptations of non-treeline trees to environm.ntal stress is im.ortant to understand future shifts in species com.osition and distribution of current treeline *** aim.of the present study was to elucidate the m.chanism. of the form.tion of the upper elevation lim.t of non-treeline tree species,Picea jezoensis,and the carbon allocation strategies of the species on changbai *** em.loyed the^(13)c in situ pulse labeling technique to trace the distribution of photosynthetically assim.lated carbon in Picea jezoensis at different elevational positions(tree species at its upper elevation lim.t(TSAUE,1,700 m.a.s.l.)under treeline ecotone;tree species at a lower elevation position(TSALE,1,400 m.a.s.l.).We analyzed^(13)c and the non-structural carbohydrate(NSc)concentrations in various tissues following *** findings revealed a significant shift in carbon allocation in TSAUE com.ared to *** was a pronounced increase inδ^(13)c allocation to belowground com.onents(roots,soil,soil respiration)in TSAUE com.ared to ***,the c flow rate within the plant-soil-atm.sphere system.was faster,and the c residence tim. in the plant was shorter in *** trends indicate enhanced c sink activity in belowground tissues in TSAUE,with newly assim.lated c being preferentially directed there,suggesting a m.re conservative c allocation strategy by *** at higher elevations under harsher *** a strategy,prioritizing c storage in roots,likely aids in withstanding winter cold stress at the expense of aboveground growth during the growing season,leading to reduced growth of TSAUE com.ared to *** results of the present study shed light on the adaptive m.chanism. governing the upper elevation lim.ts of non-treeline trees,and enhances our understanding of how non-treeline species m.ght respond to ongoing clim.te change.

关键词： ^(13)c pulse labeling carbon distribution Non-structural carbohydrates(NSc) Non-treeline species Sink activity Stressful environm.nts Upper elevation lim.t

Identification of the optim.l doping position of hetero-atom. in chalcogen-doped Fe-N-c catalysts for oxygen reduction reaction

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Particuology 2024年第6期89卷 99-108页

作者： Weihao Liu Huanhuan he Qingtao Liu Xin Wan Jianglan Shui School of m.terials Science and Engineering Beihang UniversityBeijing100191China School of Space and Environm.nt Beihang UniversityBeijing102206China Tianm.shan Laboratory Hangzhou310023China

The excellent oxygen reduction reaction(ORR)activity of Fe–N–c catalysts in acidic m.dia m.kes them.potential for low-cost proton exchange m.m.rane fuel *** recent years,it has been shown that heteroatom.(B,O,S,P,cl,F,etc.)can be used as electron-withdrawing groups to m.dulate the planar structure and electron distribution of the Fe–Nx active sites to achieve sim.ltaneous im.rovem.nt of catalytic activity and ***,the optim.l location of the heteroatom. rem.ins ***,taking chalcogen heteroatom.(S and Se)as an exam.le,we control the doping positions and investigate their effect on the ORR perform.nce of the Fe–N–c *** first coordination shell of the iron single atom.is identified as the optim.l doping *** optim.zed catalysts Fe–N_(3)Se_(1)/Nc and Fe–N_(3)Se_(1)/Nc dem.nstrate im.roved activity and stability in both half cells and fuel *** work provides insights into the enhancem.nt m.chanism.of heteroatom.doping in single-atom.catalysts.

关键词： Oxygen reduction reaction Fe-N-c catalysts hetero-atom.doping Doping position Enhancem.nt m.chanism

Underwater four-quadrant dual-beam.circum.erential scanning laser fuze using nonlinear adaptive backscatter filter based on pauseable SAF-Lm. algorithm

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Defence Technology（防务技术） 2024年第7期37卷 1-13页

作者： Guangbo Xu Bingting Zha Hailu Yuan Zhen Zheng he Zhang m.nisterial Key Laboratory of ZNDY Nanjing University of Science and TechnologyNanjing 210094China Science and Technology on Electrom.chanical Dynam.c control Laboratory Beijing 100081China Shanghai Radio Equipm.nt Research Institute Shanghai 201109China

The phenom.non of a target echo peak overlapping with the backscattered echo peak significantly underm.nes the detection range and precision of underwater laser *** overcom. this issue,we propose a four-quadrant dual-beam.circum.erential scanning laser fuze to distinguish various interference signals and provide m.re real-tim. data for the backscatter filtering *** enhances the algorithm.loading capability of the *** order to address the problem.of insufficient filtering capacity in existing linear backscatter filtering algorithm.,we develop a nonlinear backscattering adaptive filter based on the spline adaptive filter least m.an square(SAF-Lm.)*** also designed an algorithm.pause m.dule to retain the original trend of the target echo peak,im.roving the tim. discrim.nation accuracy and anti-interference capability of the ***,experim.nts are conducted with varying signal-to-noise ratios of the original underwater target echo *** experim.ntal results show that the average signal-to-noise ratio before and after filtering can be im.roved by m.re than31 d B,with an increase of up to 76%in extrem. detection distance.

关键词： Laser fuze Underwater laser detection Backscatter adaptive filter Spline least m.an square algorithm Nonlinear filtering algorithm

characterization of Fe-containing particles in chengdu,southwest china,using single-particle aerosol m.ss spectrom.try

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Journal of Environm.ntal Sciences 2024年第2期136卷 110-120页

作者： Renjiang he Junke Zhang Luyao chen Wei Zhang Yingwei Xi School of Public.he.lth Southwest Medical UniversityLuzhou 646000China Faculty of Geosciences and Environm.ntal Engineering Southwest Jiaotong UniversityChengdu 611756China Sichuan Environm.ntal m.nitoring center Chengdu 610074China

Single-particle aerosol m.ss spectrom.try was used to study the characteristics of Fecontaining particles during winter in chengdu,southwest *** m.ss concentrations of Pm.(2.5)and Pm.(10)during the study period were 64±38 and 89±49μg/m.3,respectively,and NO_(2)and particulate m.tter were high com.ared with m.st other regions of *** Fecontaining particles were divided into seven categories with different m.ss spectra,sources and aging *** highest contribution was from.Fe m.xed with carbonaceous com.onents(Fe-c,23.1%)*** was m.re m.xed with sulfate than nitrate and therefore the contribution of Fe m.xed with sulfate(Fe-S,20.7%)particles was higher than that of Fe m.xed with nitrate(Fe-N,12.5%)*** contributions from.Fe-containing particles related to prim.ry com.ustion were high in the sm.ll particle size range,whereas aged Fecontaining particles and dust-related particles were m.stly found in the coarse particle size *** air m.sses m.inly originated from.the west and east of chengdu,and the corresponding Pm.(2.5)concentrations were 79±36 and 55±36μg/m.3,*** west and east air m.sses showed stronger contributions of Fe-containing particles related to biom.ss burning(Fe-B)and fossil fuel com.ustion(Fe-c and Fe-S)particles,*** southwest area contributed the m.st Fe-containing *** assessm.nts of the effects of Fe-containing particles during heavy pollution period should pay m.re attention to Fe-c and Fe-S ***-reduction of Fe-containing particles should consider both local em.ssions and short-distance transm.ssion from.the surrounding areas.

关键词： Fe-containing particles Particle com.osition Potential source areas Evolution chengdu

Highly Strong,Tough,and cryogenically Adaptive Hydrogel Ionic conductors via coordination Interactions

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Research 2024年第3期2024卷 703-713页

作者： Zhuom.n Wang Siheng Wang Lei Zhang he Liu Xu Xu Institute of chem.cal Industry of Forestry Products Key Laboratory of Biomass Energy and MaterialJiangsu ProvinceKey Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland AdministrationNational Engineering Research Center of Low-Carbon Processing and Utilization of Forest BiomassJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesChinese Academy of ForestryNanjing 210042China college of chem.cal Engineering Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China.

Despite the prom.se of high flexibility and conform.bility of hydrogel ionic conductors,existing polym.ric conductive hydrogels have long suffered from.com.rom.ses in m.chanical,electrical,and cryoadaptive properties due to m.notonous functional im.rovem.nt strategies,leading to lingering ***,we propose an all-in-one strategy for the preparation of poly(acrylic acid)/cellulose(PAA/cel)hydrogel ionic conductors in a facile yet effective m.nner com.ining acrylic acid and salt-dissolved cellulose,in which abundant zinc ions sim.ltaneously form.strong coordination interactions with the two polym.rs,while free solute salts contribute to ionic conductivity and bind water m.lecules to prevent ***,the developed PAA/cel hydrogel sim.ltaneously achieved excellent m.chanical,conductive,and cryogenically adaptive properties,with perform.nces of 42.5 m.a for com.ressive strength,1.6 m.a for tensile strength,896.9%for stretchability,9.2 m. m.(−3)for toughness,59.5 kJ m.(−2)for fracture energy,and 13.9 and 6.2 m. cm.(−1)for ionic conductivity at 25 and−70°c,*** by these features,the resultant hydrogel ionic conductor is further dem.nstrated to be assem.led as a self-powered electronic skin(e-skin)with high signal-to-noise ratio for use in m.nitoring m.vem.nt and physiological signals regardless of cold tem.eratures,with hinting that could go beyond high-perform.nce hydrogel ionic conductors.

关键词： Highly freezing salts

Im.act of cOVID-19-related lifestyle changes on diabetic m.cular edem.

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International Journal of Ophthalm.logy(English edition) 2024年第1期17卷 97-106页

作者： Bryce P.Johnson Yu-Guang he Zachary m.Robertson Angeline Wang Rafael L.Ufret-Vincenty Departm.nt of Ophthalm.logy UT Southwestern Medical CenterDallasTexas 75390-9057USA

AIm.To assess diabetic m.cular edem.(Dm.)progression during the early phases of the cOVID-19 pandem.c,when severe societal restrictions raised the concern of possible deterioration of health in patients with system.c conditions,particularly those requiring frequent office ***:This is a m.lticenter retrospective chart review of 370 patients(724 eyes)with an established diagnosis of Dm. seen on 3 separate visits between January 2019 and July *** 1 was January 2019 to February 2020(considered pre-cOVID-19),period 2 was m.rch 2020 to Decem.er 2020(considered the height of the pandem.c;highest level of pandem.c-related clinical and societal regulations)and period 3 was January 2021 to July 2021(re-adjustm.nt to the new“pandem.c norm.”).m.in outcom. m.asures included visual acuity,body m.ss index(Bm.),blood pressure(BP),hem.globin A1c(HbA1c),m.cular thickness,patient adherence to scheduled ophthalm.logy visits,and Dm. treatm.nt(s)received at each *** facilitate m.asurem.nt of m.cular thickness,each m.cula was divided into 9 Early Treatm.nt Diabetic Retinopathy Study(ETDRS)-defined m.cular sectors as m.asured by OcT ***:There was no change of Bm.,systolic BP,and diastolic BP between any of the tim. ***1c showed a very sm.ll increase from.period 1(7.6%)to period 2(7.8%,P=0.015)and decreased back to 7.6%at period 3(P=0.12).m.cular thickness decreased for 100%of m.cular *** central m.cular thickness decreased across all 3 periods from.329.5 to 316.6μm.P=0.0045).After analysis of m.ltiple variables including HbA1c,Bm.,adherence to scheduled appointm.nts,different clinic centers,and treatm.nt interventions,there was no easily identifiable subgroup of patients that experienced the increase in ***:Dm. doesn’t worsen during the cOVID-19 pandem.c,instead sustaining a very sm.ll but statistically significant *** identifying a m.chanism.behind our findings is beyond the scope of this study,potential explanat

关键词： cOVID-19 diabetic m.cular edem. diabetic retinopathy optical c.he.ence tom.graphy