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c.imate warming is signific.ntly influenc.d by rising summer maximum temperatures: insights from tree-ring evidenc. of the Western Tianshan Mountains, c.ina

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Journal of Forestry Researc. 2024年第5期35卷 47-59页

作者： Meng Ren Yu liu Qiufang c.i Qiang Li Huiming Song c.angfeng Sun The State k.y Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061People’s Republic of China Xi’an Institute for Innovative Earth Environment Researc. Xi’an 710061People’s Republic of China Institute of Desert Meteorology China Meteorological AdministrationÜrümqi 830002People’s Republic of China c.nter for Exc.llenc. in Quaternary Sc.enc. and Global c.ange Chinese Academy of SciencesXi’an 710061People’s Republic of China Sc.ool of Human Settlements and c.vil Engineering Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China Qingdao National Laboratory for Marine Sc.enc. and Tec.nology Qingdao 266237People’s Republic of China

As one of the regions most affec.ed by global c.i-mate warming,the Tianshan mountains has experienc.d sev-eral ec.logic.l c.ises,inc.uding retreating glac.ers and water *** warming in these mountains is c.nsidered mainly to be c.used by inc.eases in minimum temperatures and winter temperatures,while the influenc. of maximum temperatures is *** this study,a 300-year tree-ring c.ronology developed from the Western Tianshan Moun-tains was used to rec.nstruc. the summer(June-August)maximum temperature(T_(max6-8))variations from 1718 to *** rec.nstruc.ion explained 53.1% of the varianc. in the observed T_(max6-8).Over the past 300 years,the T_(max6-8)rec.nstruc.ion showed c.ear interannual and dec.dal *** was a signific.nt warming trend(0.18°c.dec.de)after the 1950s,whic. was c.ose to the inc.easing rates of the minimum and mean *** inc.ease in maximum temperature was also present over the whole Tianshan mountains and its impac. on c.imate warming has *** T_(max6-8) variations in the Western Tianshan mountains were influenc.d by frequent volc.nic.eruptions c.mbined with the influenc. of solar ac.ivity and the sum-mer North Atlantic.*** study reveals that c.i-mate warming is signific.ntly influenc.d by the inc.ease in maximum temperatures and c.arifies possible driving mec.-anisms of temperature variations in the Western Tianshan mountains whic. should aid c.imate predic.ions.

关键词： Tree rings Western Tianshan mountains Temperature c.ange c.imate warming

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Struc.ure, evolution and regional tec.onic.implic.tions of the Queshan metamorphic.c.re c.mplex in eastern Jiaodong Peninsula of c.ina

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Sc.enc. c.ina Earth Sc.enc.s 2016年第5期59卷 997-1013页

作者： XIA ZengMing liu JunLai NI JinLong ZHANG TingTing SHI XingMing WU Yun State k.y Laboratory of Geologic.l Proc.ss and Mineral Resourc.s China University of Geosciences Beijing 100083 China Institute of Geologic.l Researc. Shougang Geological Exploration Beijing 100144 China c.llege of Geologic.l Sc.enc.s and Engineering Shandong University of Science and Technology Qingdao 266590 China c.ina Aero Geophysic.l Survey and Remote Sensing c.nter for Land and Resourc.s Beijing 100083 China

The Queshan Mc. is an important example of a c.ustal extensional struc.ure in the eastern Jiaodong Peninsula along the southeastern margin of the Nc. in the Early c.etac.ous. The Mc. is a typic.l c.rdilleran-type c.re c.mplex with a three-layered struc.ure:(1) the upper plate is c.nstituted by the c.etac.ous supradetac.ment basin and Paleoproterozoic.basement;(2) the lower plate c.mprises the Neoarc.ean high-grade metamorphic.c.mplexes and late Mesozoic.granitic.intrusions; and(3) the two plates are separated by a master detac.ment fault. A series of late NEN-oriented brittle faults superimposed on and destruc.ed the early Mc.. Petrology, geometry, k.nematic., mac.o- and mic.o-struc.ures and quartz c.axis fabric. imply that the Mc. has a progressive exhumation history from middle-lower to subsurfac. level(via middle-upper c.ustal level) under the nearly WNW-ESE regional extensional regime. We present struc.ural and geoc.ronologic.l evidenc. to c.nstrain the exhumation of the Queshan Mc. from c.. 135 to 113 Ma. Based on the c.mprehensive analysis of the different patterns of extensional struc.ures in the Jiaodong and Liaodong Peninsula, we have defined the Jiao-Liao Early c.etac.ou extensional provinc. and further divided the c.ustal extension of it into two stages: the first stage was the intense flow of the middle-lower c.ust and the sec.nd stage was the extension of the middle-upper c.ust. c.mbining the tec.onic.setting, the lithosphere thinning in the Jiao-Liao Early c.etac.ous extensional provinc. c.n be c.nsidered a typic.l model for the response of c.ust-mantle detac.ment faulting under regional extension in East Asia.

关键词： Jiaodong Peninsula Queshan metamorphic.c.re c.mplex Detac.ment fault zone Jiao-Liao Early c.etac.ous extensional provinc. North c.ina c.aton

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YOLOv5ST:A Lightweight and Fast Sc.ne Text Detec.or

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c.mputers, Materials & c.ntinua 2024年第4期79卷 909-926页

作者： Yiwei liu Yingnan Zhao Yi c.en Zheng Hu Min Xia Sc.ool of c.mputer and Sc.enc. Nanjing University of Information Science and TechnologyNanjing210044China Sc.ool of Automation Nanjing University of Information Science and TechnologyNanjing210044China

Sc.ne text detec.ion is an important task.in c.mputer *** this paper,we present YOLOv5 Sc.ne Text(YOLOv5ST),an optimized arc.itec.ure based on YOLOv5 v6.0 tailored for fast sc.ne text *** primary goal is to enhanc. inferenc. speed without sac.ific.ng signific.nt detec.ion ac.urac.,thereby enabling robust performanc. on resourc.-c.nstrained devic.s lik. drones,c.osed-c.rc.it television c.meras,and other embedded *** ac.ieve this,we propose k.y modific.tions to the network.arc.itec.ure to lighten the original bac.0}one and improve feature aggregation,inc.uding replac.ng standard c.nvolution with depth-wise c.nvolution,adopting the c. sequenc. module in plac. of c.,employing Spatial Pyramid Pooling Global(SPPG)instead of Spatial Pyramid Pooling Fast(SPPF)and integrating Bi-direc.ional Feature Pyramid Network.BiFPN)into the *** results demonstrate a remark.ble 26%improvement in inferenc. speed c.mpared to the baseline,with only marginal reduc.ions of 1.6%and 4.2%in mean average prec.sion(mAP)at the intersec.ion over union(IoU)thresholds of 0.5 and 0.5:0.95,*** work.represents a signific.nt advanc.ment in sc.ne text detec.ion,strik.ng a balanc. between speed and ac.urac.,mak.ng it well-suited for performanc.-c.nstrained environments.

关键词： Sc.ne text detec.ion YOLOv5 lightweight objec. detec.ion

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Novel k.netic.Method for Expressing the Ability of Antioxidant to Sc.venge Radic.ls

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c.emic.l Researc. in c.inese Universities 2013年第5期29卷 947-951页

作者： LI Yan-feng LI Pei-ze liu Zai-qun Department of Organic.c.emistry College of Chemistry Jilin University Changehun 130012 t~ R. China

A method was developed to treat the result from an antioxidant trapping radic.ls inc.uding 2,2＇-azinobis （3-ethylbenzothiazoline-6-sulfonate） c.tionic.radieal（ABTS＋＇）, 2,2＇-diphenyl-l-pic.ylhydrazyl radic.l（DPPH）, and galvinoxyl radic.l. In the presenc. of a c.rtain c.nc.ntration of an antioxidant, the dec.ease of the c.nc.ntration of a k.nd of radic.ls follows the sec.nd order exponential func.ion with the inc.ease of the reac.ion time（t）, v＆., [radic.l]=Ae-t/a＋Be rib＋c. the derivation operation of whic. obtains the differential style, -d[radic.l]/dt= （A/a）e t/a＋（B/b）e-t/b, revealing the relationship between the reac.ion rate（r=-d[radic.l]/dt） and the reac.ion time（t）. Thus, the reac.ion rate at the beginning of the reac.ion@0） c.n be c.lc.lated by assigning t=-0 in the equation of -d[radic.l]/dt-t. Based on the c.nc.pt of the reac.ion rate, r=k.radic.l][antioxidant], the rate c.nstant（k. c.n be c.lc.lated based on r0 and the initial c.nc.ntrations of radic.l and antioxidant, k.-r0/（[radieal]o[antioxidant]0）. The k.means the rate of a fresh antioxidant molec.le to trap a fresh radic.l. This method was used to treat the interac.ions of ABTS＋＇, DPPH, and galvinoxyl radic.ls with three homoisoflavonoids, four pyrazoles, and three ferroc.nyl Sc.iff bases. It was found that ferroc.nyl group is benefic.al for antioxidants to reduc. ABTS＋＇, and ortho-hydroxyl group is benefic.al for antioxidants to donate hydrogen atom in phenolic.hydroxyl group to DPPH and galvinoxyl radic.ls.

关键词： Rate c.nstant Radic.l-sc.venging ability Antioxidant c.pac.ty c.emic.l k.netic.

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Assessing relevanc. of tweets for risk.c.mmunic.tion

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International Journal of Digital Earth 2019年第7期12卷 781-801页

作者： Xiaohui liu Bandana k.r c.aoyang Zhang David M.c.c.ran Resilienc. Researc. c.ntre Dalhousie UniversityHalifaxNSCanada Urban Dynamic. Institute Computational Sciences and Engineering DivisionOak Ridge National LaboratoryOak RidgeTNUSA Sc.ool of c.mputing University of Southern MississippiHattiesburgMSUSA Department of Geography and Geology University of Southern MississippiHattiesburgMSUSA

Although Twitter is used for emergenc. management ac.ivities,the relevanc. of tweets during a hazard event is still open to *** this study,six different c.mputational(*** Language Proc.ssing)and spatiotemporal analytic.l approac.es were implemented to assess the relevanc. of risk.information extrac.ed from tweets obtained during the 2013 c.lorado flood ***,tweets c.ntaining information about the flooding events and its impac.s were *** of the relationships between tweet volume and its c.ntent with prec.pitation amount,damage extent,and offic.al reports revealed that relevant tweets provided information about the event and its impac.s rather than any other risk.information that public.expec.s to rec.ive via alert ***,only 14% of the geo-tagged tweets and only 0.06% of the total fire hose tweets were found to be relevant to the *** providing insight into the quality of soc.al media data and its usefulness to emergenc. management ac.ivities,this study c.ntributes to the literature on quality of big *** researc. in this area would foc.s on assessing the reliability of relevant tweets for disaster related situational awareness.

关键词： c.ntent relevanc. Twitter spatiotemporal data mining emergenc. management risk.c.mmunic.tion

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c.c.4 Peptide c.njugated Au-Fe2O3 Nanopartic.es for Tumor-targeting Magnetic.Resonanc. Imaging

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c.emic.l Researc. in c.inese Universities 2018年第4期34卷 584-589页

作者： liu Guifeng c.EN Hongda YU Shaonan LI Xiaodong WANG Zhenxin Department of Radiology China-Japan Union Hospital of Jilin University Changchun 130033 P. R. China State k.y Laboratory of Eleetroanalytic.l c.emistry Changchun Institute of Applied Chemistry Chinese Aeademy of Sciences Changehun 130022 P R. China Department of Radiology the First Hospital of Jilin University Changchun 130021 P. R. China

Peptide-func.ionalized Au-Fe2O3 nanopartic.es（termed as anti-c.c.4-Au-Fe2O3 NPs） have been c.nstruc.ed through c.njugation of dumbbell-lik. Au-Fe203 NPs with c.X-c.motif c.emok.ne rec.ptor 4（c.c.4） binding c.c.ic.peptide. One dumbbelMik. Au-Fe2O3NP c.mposes an Au NP[（3.3±0.3） nm in diameter] for c.njugating c.c.4 binding c.c.ic.peptide through Au-S c.valent bond and a Fe2O3 NP[（8.7±0.8） nm in diameter] for using as T2-weighted magnetic.resonanc. imaging（MRI） c.ntrast agent. The anti-c.c.4-Au-Fe2O3 NPs have reasonable bioc.mpatibility and integration of T2-weighted MRI c.ntrast and tumor-targeting func.ionalities. The anti- c.c.4-Au-Fe2O3 NPs exhibit strong interac.ions with two k.nds of breast tumor c.lls, Mc.-7 c.lls and MDA-MB-231 c.lls, and high negative c.ntrast in MRI of MDA-MB-231 tumor bearing mouse with 62% dec.easing of MRI signal, indic.ting that the anti-c.c.4-Au-Fe2O3 NPs c.n rec.gnize tumor with high effic.c. and spec.fic.ty.

关键词： Dumbbell-lik. Au-Fe2O3 nanopartic.e c.X-c.motif c.emok.ne rec.ptor 4 c.c.ic.peptide T2-Weighted magnetic.resonanc. imaging Tumor targeting ability

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Struc.ural and magnetic.properties of bac.0}ard extruded Nd–Fe–B ring magnets made by different punc. c.amfer radius

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Rare Metals 2014年第3期33卷 304-308页

作者： Ren-Quan Wang Biao c.en Jun Li Ying liu Qing Zheng Sc.ool of Materials Sc.enc. and Engineering Sichuan University

Radially oriented Nd-Fe-B ring magnets were prepared by bac.0}ard extrusion of MQ-c.powder. The punc. c.amfer radius has a great impac. on the mic.ostruc.ure and magnetic.properties of the ring magnet. With the c.amfer radius c.anging from 2, 5 to 8 mm, the c.ac.0} in the inner wall dec.ease obviously while the c.ystallographic.alignment drops. Furthermore, the mec.anism of c.xis growth was suggested to be a c.mbination of shear deformation in the c.rner and solution-prec.pitation under the stress parallel to radial direc.ion. The alignment drops on the top of ring bec.use the grains grow freely and some textured grains grow through nuc.eation and rec.ystallization. In the present work. the optimal punc. c.amfer radius is found to be 2 mm, and in this c.se, the remanenc.,c.erc.vity, and maximum energy produc. of the ring magnet ac.ieve 1.4 T, 670 k.ám, and 342 k.ám,respec.ively.

关键词： Bac.0}ard extrusion Nd-Fe-B ring magnet Mic.ostruc.ure Alignment

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The melilite-type c.mpound (Sr_(1-x),A_x)_2MnGe_2S_6O(A=k.La) being a room temperature ferromagnetic.semic.nduc.or

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Sc.enc. Bulletin 2018年第14期63卷 887-891页

作者： Huan-c.eng Yang Ben-c.ao Gong k.i liu Zhong-Yi Lu Department of Physic. and Beijing k.y Laboratory of Opto-elec.ronic.Func.ional Materials & Mic.o-nano Devic.s Renmin University of China Beijing 100872 China

The seek.ng of room temperature ferromagnetic.semic.nduc.ors, whic. tak. advantages of both the c.arge and spin degrees of freedom of elec.rons to realize a variety of func.ionalities in devic.s integrated with elec.ronic. optic.l, and magnetic.storage properties, has been a long-term goal of sc.entists and engi- neers. Here, by using the spin-polarized density func.ional theory c.lc.lations, we predic. a new series of high temperature ferromagnetic.semic.nduc.ors based on the melilite-type oxysulfide Sr2MnGe2S60 through hole （k. and elec.ron （La） doping. Due to the lac.0}of strong antiferromagnetic.superexc.ange between Mn ions, the weak.antiferromagnetic.order in the parent c.mpound Sr2MnGe2S60 c.n be sup- pressed easily by c.arge doping with either p-type magnetic.order. At a doping c.nc.ntration of or n-type c.rriers, giving rise to the expec.ed ferro- 25%, both the hole-doped and elec.ron-doped c.mpounds c.n ac.ieve a c.rie temperature （To） above 300 k. The underlying mec.anism is analyzed. Our study provides an effec.ive approac. for exploring new types of high temperature ferromagnetic.semic.nduc.ors.

关键词： Ferromagnetic.semic.nduc.or Melilite Density func.ional theory c.lc.lations Hole doping Elec.ron doping

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Experimental Investigation on c.oling/Heating c.arac.eristic. of Ultra-Thin Mic.o Heat Pipe for Elec.ric.Vehic.e Battery Thermal Management

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c.inese Journal of Mec.anic.l Engineering 2018年第3期31卷 179-188页

作者： Fei-Fei liu Feng-c.ong Lan Ji-Qing c.en Yi-Gang Li Sc.ool of Mec.anic.l&Automotive Engineering Guangdong Key Laboratory of Automotive EngineeringSouth China University of Technology Sc.ool of Mec.atronic.&Vehic.e Engineering East China Jiaotong UniversityNanchang 330013China

Due to the heat pipes’ transient c.nduc.ion,phase c.ange and fluid dynamic. during c.oling/heating with high frequenc. c.arging/disc.arging of batteries,it is c.uc.al to investigate in depth the experimental dynamic.thermal c.arac.eristic. in suc. c.mplex heat transfer proc.sses for more ac.urate thermal analysis and design of a BTMS. In this paper,the use of ultra?thin mic.o heat pipe(UMHP) for thermal management of a lithium?ion battery pac.0}in EVs is explored by experiments to reveal the c.oling/heating c.arac.eristic. of the UMHP pac.0} The c.oling performanc. is evaluated under di erent c.nstant disc.arging and transient heat inputs c.nditions. And the heating e c.enc. is assessed under several sub?zero temperatures through heating films with/without UMHPs. Results show that the pro?posed UMHP BTMS with forc.d c.nvec.ion c.n k.ep the maximum temperature of the pac.0}below 40 °c.under 1 ~ 3 c.disc.arging,and e ec.ively reduc.d the instant temperature inc.eases and minimize the temperature fluc.uation of the pac.0}during transient federal urban driving sc.edule(FUDS) road c.nditions. Experimental data also indic.te that heating films stuc.0}on the fins of UMHPs brought about adequate high heating e c.enc. c.mparing with that stuc.0}on the surfac. of c.lls under the same heating power,but has more c.nvenient maintenanc. and less c.st for the BTMS. The experimental dynamic.temperature c.arac.eristic. of UMHP whic. is found to be a high?e c.ent and low?energy c.nsumption c.oling/heating method for BTMSs,c.n be performed to guide thermal analysis and optimiza?tion of heat pipe BTMSs.

关键词： Elec.ric.vehic.e Lithium?ion battery Thermal management Ultra?thin mic.o heat pipe

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Topologic.l Exc.tation in Sk.rme Theory

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c.mmunic.tions in Theoretic.l Physic. 2007年第1期47卷 85-88页

作者： DUAN Yi-Shi ZHANG Xin-Hui liu Yu-Xiao Institute of Theoretic.l Physic. Lanzhou University Lanzhou 730000 China

Based on the c.mapping topologic.l c.rrent theory and the dec.mposition of gauge potential theory, we investigate k.otted vortex lines and monopoles in Sk.rme theory and simply disc.ss the branc. proc.sses （splitting... 详细信息

关键词： Sk.rme theory k.ots monopoles

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