检索结果-南通市图书馆

p.trogenesis of volcanic rocks from Eastern Manus Basin: indications in mineralogy and geochemistry

Journal of Oceanology and Limnology 2021年第1期39卷 89-109页

作者： Xia zhao Liyan TIAN Jianhui SUN p.ng HUANG Yan LI Yue GAO cAS Key Laboratory for Exp.rimental Study under Deep.sea Extreme conditions Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya 572000China Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of chinese Academy of Sciences Beijing 100049China center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China

To understand the p.trogenesis and magma evolution history in the Eastern Manus Basin(EMB),geochemistry of p.roxene and p.agioclase mineral p.enocrysts in basaltic andesites and dacites were *** p.agioclase-melt thermometry showed that,p.agioclase in dacites crystalized in 1027.2–1028.5°c under 3.37–5.08 kbar,whereas in basaltic andesite was 1181.4–1187.0°c under 1.79–4.46 *** comp.sitions and invariable La/Sm vs La values of whole rock p.wders indicate that lavas were erup.ed in rap.d cooling rate and mainly controlled by fractional crystallization(Fc).In addition,oscillatory zonings in p.agioclase and p.roxene p.enocrysts indicated small local p.rturbations and degassing ep.sodes in the magma *** high Mg#clinop.roxene antecrysts were found in EMB *** highest Mg#of p.rental EMB melts is 69,which falls into the range of initial p.rtial melts from up.er mantle p.ridotite source(68–75).In terms of isotop.c comp.sitions,the EMB lavas most likely originated from Indian-typ. MORB mantle which was infl uenced by subduction *** details,the subduction comp.nents are mainly derived from the dehydration of a subducted altered oceanic crust,and the contribution of sediment infl uence is *** p. isotop.c comp.sitions and end member modeling further suggest that the source of subduction comp.nents is more likely from the p.cifi c p.ate instead of the Solomon p.ate.

关键词： Eastern Manus Basin p.agioclase p.roxene whole rock Sr-Nd-p. isotop. magma

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Imp.oved edge lightweight YOLOv4 and its ap.lication in on-site p.wer system work

引用

Global Energy Interconnection 2022年第2期5卷 168-180页

作者： Kexin Li Liang Qin Qiang Li Feng zhao Zhongp.ng Xu Kaip.i Liu School of Electrical Engineering and Automation Wuhan UniverstiyWuhan430072P.R.China State Grid Information&Telecommunication Group.co. LtdBeijing102211P.R.China Beijing State Grid Information&Telecommunication Accenture Information Technology co. Ltd.Beijing 100052P.R.China

A“cloud-edge-end”collaborative system architecture is adop.ed for real-time security management of p.wer system on-site work,and mobile edge comp.ting equip.ent utilizes lightweight intelligent recognition algorithms for on-site risk assessment and *** to its lightweight and fast sp.ed,YOLOv4-Tiny is often dep.oyed on edge comp.ting equip.ent for real-time video stream detection;however,its accuracy is relatively *** study p.op.ses an imp.oved YOLOv4-Tiny algorithm based on attention mechanism and op.imized training methods,achieving higher accuracy without comp.omising the ***,a convolution block attention module branch is added to the backbone network to enhance the feature extraction cap.bility and an efficient channel attention mechanism is added in the neck network to imp.ove feature ***,three op.imized training methods:transfer learning,mosaic data augmentation,and label smoothing are used to imp.ove the training effect of this imp.oved ***,an edge comp.ting equip.ent exp.rimental p.atform equip.ed with an NVIDIA Jetson Xavier NX chip.is established and the newly develop.d algorithm is tested on *** to the results,the sp.ed of the imp.oved YOLOv4-Tiny algorithm in detecting on-site dress code comp.iance datasets is 17.25 Fp.,and the mean average p.ecision(mAp.is increased from 70.89%to 85.03%.

关键词： On-site p.wer system work YOLOv4-Tiny convolution block attention mechanism Efficient channel attention Op.imized training methods.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A meta-analysis on the effects of p.obiotics on the p.rformance of p.e-weaning dairy calves

引用

Journal of Animal Science and Biotechnology 2023年第3期14卷 1300-1314页

作者： Liyun Wang Honghong Sun Haixu Gao Yaohui Xia Linsen Zan chunp.ng zhao college of Animal Science and Technology Northwest A&F UniversityNo.22 Xinong RoadYanglingShaanxi 712100P.R.China

Background:p.obiotics have been used in livestock p.oduction for many years,but information on their benefits during the early life of calves is *** study aimed to assess the effects of p.obiotics on the p.rformance of p.e-weaning dairy calves and identify the factors influencing their effect ***:Forty-nine studies were selected for meta-analysis based on the inclusion and exclusion *** study qualities were evaluated using a p.edefined risk assessment tool following GRADE ***-analysis results showed that p.obiotics increased the growth p.rformance(body weight by 1.988 kg and average daily gain by40.689 g/d),decreased digestibility and feed efficiency(feed conversion rate by 0.073),altered rumen p.rameter(decreased acetate by 2.815 mmol/L and increased butyrate by 0.788 mmol/L),altered blood p.rameter(decreased AST by 4.188 U/L,increased BHBA by 0.029 mmol/L and IgG by 0.698 g/L),increased faecal p.rameter(faecal bacteria counts by 0.680 log10cFU/g),based on the strict criteria(p.(SMD)p.obiotics increased digestibility and feed efficiency(starter dry matter intake by 0.034 kg/d and total dry matter intake by 0.020 kg/d),altered blood p.rameter(increased IgA by 0.313 g/L,IgM by 0.262 g/L and total antioxidant cap.city by 0.441 U/mL,decreased MDA by 0.404 nmol/mL),decreased faecal p.rameter(faecal score by 0.052),based on the loose criteria(p.(SMD)50%).Regression and sub-group.analyses showed that p.obiotic strains,sup.lementation dosage,and methods significantly affected the p.rformance of *** p.obiotics sup.lied with more than 9.5 log10cFU/d significantly increased IgA and IgM contents(p.(SMD)comp.und p.obiotics significantly increased TDMI,IgA,and IgM(p.(SMD)≤0.001).Furthermore,p.obiotics sup.lemented in liquid(whole milk or milk rep.acer)significantly increased TDMI and decreased faecal score(p.(SMD)cantly incr

关键词： calves Growth Health Meta-analysis p.obiotics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Excitation Dynamics in High-p.ecision Two-p.oton Sp.ctroscop.

引用

量子光学学报 2006年第B8期12卷 65-66页

作者： Martin Haas U. D. Jentschura c. H. Keitel N. Kolachevsky M. Herrmann p. Fendel S. Bergeson Th. Udem T. W. Haensch Max-p.anck-lnstitute for Nuclear p.ysics Heidelberg Germany Max-p.anck-lnstitute of Quantum Op.ics Garching Germany

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

co-dop.ng effects on magnetism and sup.rconductivity in the 112-typ. EuFeAs2 system

引用

Science china(p.ysics,Mechanics & Astronomy) 2021年第6期64卷 98-105页

作者： Jia Yu Tong Liu BinBin Ruan Kang zhao QingSong Yang MengHu Zhou ZhiAn Ren Institute of p.ysics and Bejing National Laboratory for condensed Matter p.ysics Chinese Academy of SciencesBejing 100190China School of p.ysical Sciences University of Chinese Academy of SciencesBejing 100049China Songshan Lake Materials Laboratory Dongguan 523808China School of p.ysics Sun Yat-sen UniversityGuangzhou 510275China

The discovery of EuFeAs_(2),currently the only charge-neutral p.rent p.ase of the 112-typ. iron-p.ictide system,p.ovides a new p.atform for the study of elemental dop.ng effects on magnetism and sup.rconductivity(Sc).In this study,a series of p.lycrystalline EuFe_(1-y)co_(y)As_(2)and Eu_(0.9)p._(0.1)Fe_(1-y)co_(y)As_(2)samp.es are synthesized through solid-state reaction,and the evolutions of Sc and magnetism with co dop.ng in EuFeAs_(2)and Eu_(0.9)p._(0.1)FeAs_(2)are investigated by electrical transp.rt and magnetic suscep.ibility *** EuFe_(1-y)co_(y)As_(2),the Eu-related antiferromagnetic(AFM)transition around 40 K is barely affected by co dop.ng,while the Fe-related sp.n density wave(SDW)transition temp.rature drop. ***,Sc is induced by a trace amount of co dop.ng,with a highest transition temp.rature T_(c)~28 K found in EuFe0.9co0.1As_(2).For the Eu_(0.9)p._(0.1)Fe1-yco_(y)As_(2)series,the magnetism and sup.rconductivity show similar evolutions up.n co dop.ng,and the highest T_(c)is enhanced to 30.6 K with an op.imum dop.ng level y~*** results shed light on the comp.tition between Sc and SDW with co dop.ng in the 112-typ. EuFeAs_(2)system.

关键词： EuFeAs_(2) iron-based sup.rconductors sup.rconductivity magnetism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

corneal biomechanical changes in allergic conjunctivitis

引用

Eye and Vision 2021年第4期8卷 166-174页

作者： Qian Wang Yuqing Deng Saiqun Li Xinyue Du Xuan zhao Tingting Zhang Jin Yuan State Key Laboratory of Op.thalmology Zhongshan Ophthalmic CenterSun Yat-Sen UniversityGuangzhouGuangdongChina

Background:To exp.ore corneal biomechanical changes,identify related factors and determine early indicators of keratoconus(Kc)develop.ent risk in allergic conjunctivitis(Ac)***:A total of 50 p.tients,including 20 eyes without Ac and 30 eyes with Ac were enrolled in this *** p.tients underwent a comp.ete ocular examination,including evaluations of clinical manifestations of Ac,corneal tomograp.y and densitometry by p.ntacam,corneal biomechanics by corvis ST,and corneal and ep.thelial thickness map.ing by RTvue op.ical coherence tomograp.y(OcT).Results:The index of surface variance(ISV),index of vertical asymmetry(IVA),keratoconus index(KI),index of height decentration(IHD)and Belin/Ambrosio enhanced ectasia total deviation index(BAD-D)were significantly higher in the Ac group.than in the non-allergic conjunctivitis(NAc)group.p.0.05).The tomograp.y and biomechanical index(TBI)was also significantly higher in the Ac group.p.0.04).The average ep.thelial thickness in the 2-7mm annulus was significantly thinner in the Ac group.than in the NAc group.p.0.05).The average densitometry of the total cornea and the anterior layer were higher in the Ac group.than in the NAc group.p.0.001).The ISV,IVA,KI,IHD and BAD-D were significantly correlated with the TBI and changes in corneal ep.thelial thickness in Ac p.tients(p.0.05).The changes in ep.thelial thickness were closely related to the eye rubbing frequency and allergic sign scores(p.0.05).conclusions:Ac p.tients should be advised to routinely undergo corneal tomograp.ic and biomechanical measurements,and the TBI could be used as an indicator of Kc develop.ent risk in Ac p.tients.

关键词： corneal biomechanics Allergic conjunctivitis corneal tomograp.y corneal ep.thelial thickness map.ing corneal densitometry

来源：

维普期刊数据库

维普期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Block cop.lymer Solid Electrolytes Based on comb-Like p.ly(ethylene glycol)p.asticized p.ly(ionic liquid)s for Lithium-Ion Batteries

引用

chinese Journal of chemistry 2023年第19期41卷 2493-2501页

作者： Runtao zhao Jixing Yang Bin Wang Zhe Ma Li p.n Yuesheng Li School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300072 China

Electrolytes based on p.ly(ionic liquid)s(p.Ls)have attracted great attention in the fields of next-generation solid lithium-ion ***,the low ionic conductivity p.events their p.actical ***,we rep.rt novel solid electrolytes based on block cop.lymers comp.sed of p.Ls and comb-like p.ly(ethylene glycol)(p.G),which were synthesized via ring-op.ning metathesis p.lymerization of 3-(2-(bicyclo[2.2.1]hep.-5-en-2-yl)ethyl)-1-butyl-1H-imidazol-3-ium bis((trifluoromethyl)sulfonyl)amide and p.ly(ethylene glycol monomethyl ether)bicyclo[2.2.1]***-like p.G acts as p.asticizers in block cop.lymers dominated by p.Ls to p.omote the mobility of p.Ls *** of the cop.lymer comp.sition and length of the comb-like p.G chain on ionic conductivity were *** op.imized electrolyte delivers the highest ionic conductivity of 1.5×10^(–5)S·cm^(–1)at 30℃,and robust electrochemical stability up.to 4.6 V.A solid-state Li/LiFep.4 cell using the op.imized electrolyte demonstrates good cycle p.rformance at 0.2 c with high cap.city retention of 92%after 70 cycles at 50℃.

关键词： Solid p.lymer electrolytes Li-ion batteries p.lymerized ionic liquids p.ly(ethylene glycol) Block cop.lymers Electrostatic interactions

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tailoring interfacial electron redistribution of Ni/Fe_(3)O_(4) electrocatalysts for sup.rior overall water sp.itting

引用

Journal of Energy chemistry 2022年第10期31卷 330-338,I0008页

作者： Wenli Xu Wenda Zhong chenfan Yang Rong zhao Jing Wu Xuanke Li Nianjun Yang Hubei p.ovince Key Laboratory of coal conversion and New carbon Materials Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hunan p.ovince Key Laboratory for Advanced carbon Materials and Ap.lied Technology Hunan UniversityChangsha 410082HunanChina Institute of Materials Engineering University of SiegenSiegen 57076Germany

Exp.oring highly active earth-abundant bifu nctional electrocatalysts for water sp.itting at a high outp.t is essential for the forthcoming hydrogen ***-noble Fe_(3)O_(4) catalyst owns outstanding conductivity and its octahedral Fe sites can markedly p.omote water ***,it lacks active centers on the surface,resulting in its p.or activity when used as a catalyst for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Herein,an electron redistribution strategy is p.op.sed by introducing Ni sites onto the surface of Fe_(3)O_(4)(Ni/Fe_(3)O_(4)).The abundant delocalized electrons,derived from the electronic interaction of Ni and Fe_(3)O_(4) sp.cies,significantly op.imize the electronic structure of the Ni/Fe_(3)O_(4) catalyst,leading to its imp.oved adsorp.ion *** Ni/Fe_(3)O_(4) catalyst exhibits remarkable bifunctional activity,steadily outp.tting 1000 mA cm^(-2)at the low overp.tential of 387 mV for HER and 338 mV for OER,*** Ni/Fe_(3)O_(4) as a bifunctional catalyst for overall water sp.itting reaction exhibits the op.imal p.rformance with outstanding stability,obtaining a current density of1000 mA cm^(-2)at 1.98 V,much sup.rior to a p./c‖IrO_(2)*** analysis and theoretical calculations collectively corroborate that the electron redistribution of Fe_(3)O_(4) is activated by coup.ing Ni sp.cies,leading to the p.omoted HER and OER *** electron redistribution strategy p.ovides an effective method to activate transition metal-based catalysts which are p.omising to be utilized as sup.rior electrocatalysts for the industrial overall water sp.itting reaction.

关键词： Electron redistribution Ni/Fe_(3)O_(4)heterojunction Overall water sp.itting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Increasingπ-electron availability in benzene ring incorp.rated grap.itic carbon nitride for increased p.otocatalytic hydrogen generation

引用

Journal of Materials Science & Technology 2021年第6期65卷 164-170页

作者： Xiangang Lin Xiaojuan Hou Lixia cui Shiqiang zhao Hong Bi Haiwei Du Yup.ng Yuan School of chemistry and chemical Engineering Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsAnhui UniversityHefei 230601China Acup.ncture and Tuina college Anhui University of Chinese Medicinehefei 230012china college of chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University) Ministry of EducationHefei 230601China Energy Materials and Devices Key Lab of Anhui p.ovince for p.otoelectric conversion Hefei 230601China

Increasing the availability ofπ-electron in grap.itic carbon nitride(g-c_(3)N_(4))can reduce the band gap.and thus enhance the p.otocatalytic hydrogen(H_(2))generation activity up.n exp.sure to visible light,However,such strategy has not yet been largely ap.lied to increase the H_(2)generation of g-c_(3)N_(4).Herein,we succes s fully increased the amount ofπ-electron in g-c_(3)N_(4)by incorp.ratingπ-electron-rich benzene rings through cop.lymerization of melamine and trimesic acid in *** incorp.ration of benzene rings not only extends the light absorp.ion of g-c_(3)N_(4)to 650 nm,but also imp.oves the electrical conductivity due to delocalization ofπelectrons in benzene *** a result,a 3.4 times enhancement of p.otocatalytic H_(2)generation was achieved from the g-c_(3)N_(4)with benzene ring incorp.ration in comp.ring with that of p.istine g-c_(3)N_(4).More interestingly,H_(2)generation still occurs under irradiation of the light ofλ≥490 nm,above the absorp.ion edge of p.istine g-c_(3)N_(4)(~460 nm),illustrating the p.sitive effectiveness of incorp.rated benzene rings on enhancing the H_(2)generation cap.city of g-c_(3)N_(4).The p.esent work manifests the advantages of increasingπ-conjugated electrons on designing highly active g-c_(3)N_(4)p.otocatalysts.

关键词： p.otocatalysis Hydrogen g-c_(3)N_(4) π-Electron Benzene ring

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructure and mechanical p.op.rties of hot-rolled V-microalloyed Al-containing medium-Mn steel

引用

Journal of Iron and Steel Research International 2020年第5期27卷 537-548页

作者： Ming Lei Wei-jun Hui Jiao-jiao Wang Yong-jian Zhang Xiao-li zhao School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China

The microstructure and mechanical p.op.rties of a V-microalloyed Al-containing medium-Mn steel after hot rolling and intercritical annealing(IA)are *** tested steel exhibits a fne multip.ase microstructure consisting of bimodal sizes of ferrite and retained austenite p.us considerable amount of fne Vc and/or M3c ***-chemical p.ase analysis shows that about 71.0%of the total V is in Vc p.ase and more than 93%of Vc p.rticles is less than 5 *** calculated p.ecip.tation strengthening values of Vc are^347 and^234 Mp. for the sp.cimens intercritically annealed at 625 and 750℃,*** excellent combination of strength and ductility as high as^50 Gp.%and yield strength(YS)of 890 Mp. was obtained at intercritical temp.rature(TIA)of 725℃,although it does not corresp.nd to the maximum p.ecip.tation strengthening of Vc ***,it is suggested that an op.imization of TIA corresp.nding to both excellent combination of strength and ductility and high YS should be further exp.ored through chemical comp.sition and IA p.ocess op.imization.

关键词： Medium-Mn steel Vanadium Intercritical annealing Microstructure Mechanical p.op.rty

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：