检索结果-南通市图书馆

Trifluorom.thyl enable high-perform.nce single-em.tter white organic light-em.tting devices based on quinazoline acceptor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chem.cal Letters 2024年第4期35卷 442-446页

作者： Xiangan song Shaogang Shen m.ngyao Lu Ying Wang yong Zhang School of m.terials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Photochem.cal Conversion and Optoelectronic m.terials and TIPC-CityU Joint Laboratory of Functional Materials and DeviceChinese Academy of SciencesTechnical Institute of Physics and ChemistryBeijing 100190China University of Chinese Academ. of Sciences Beijing 100049China

Single-em.tter white organic light-em.tting diode(WOLED) based on sm.ll organic m.lecule exhibits great potential in sim.lifying fabrication process of WOLEDs. However, the design and synthesis of m.lecule for highly efficient single-em.tter WOLED still rem.ins a challenge. Herein, two asym.etric donor-acceptor-acceptor'(D-A-A') type m.lecule(PTZ-PQ-F and PTZ-PQ-CF3) are developed by em.loying trifluorom.thyl(CF_(3)) or fluorine atom.as secondary acceptor, which can exhibit white lighting with dual em.ssion bands consisting of blue traditional fluorescence from.quasi-axial(ax) conform.r and orange therm.lly activated delayed fluorescence(TADF) from.quasi-equatorial(eq) conform.r. The introduction of CF_(3) into PTZ-PQ-CF3 greatly enhanced the photolum.nescence quantum.yield(PLQY) by suppressing the nonradiative deactivation. Owing to electron-inductive-effect of CF3, the “eq” conform.r of PTZ-PQCF3 exhibits a m.ch sm.ller ΔESTof 0.01 e V to realize m.re efficient reverse intersystem.crossing(RISC)process, and then enhance the exciton utilization(nearly 100%) of the whole dual em.ssion system. Consequently, single-em.tter WOLEDs based on PTZ-PQ-CF3 show nearly standard white em.ssion with EQE of 13.0% and CIE of(0.35, 0.36) in m.CP host and show warm.white em.ssion with high EQE of 25.5%and CIE of(0.40, 0.47) in 35 Dcz PPy host, which are the best perform.nce am.ng reported single-em.tter WOLEDs.

关键词： Single-em.tter white organic light-em.tting diode Conform.tional isom.rism Therm.lly activated delayed fluorescence Trifluorom.thyl Exciton utilization

Superm.ssive Prim.rdial Black Holes for Nano-Hertz Gravitational Waves and High-redshift JWST Galaxies

在线全文

学校读者我要写书评

暂无评论

Research in Astronom. and Astrophysics 2024年第9期24卷 1-6页

作者： Hai-Long Huang yong Cai Jun-Qian Jiang Jun Zhang Yun-song Piao School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institute for Astrophysics School of PhysicsZhengzhou UniversityZhengzhou 450001China International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of SciencesBeijing 100190China Taiji Laboratory for Gravitational Wave Universe(Beijing/Hangzhou) University of Chinese Academy of SciencesBeijing 100049China School of Fundam.ntal Physics and m.them.tical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China

Recently,observational hints for superm.ssive black holes have been accum.lating,prom.ting the question:Can prim.rdial black holes(PBHs)be superm.ssive,particularly with m.sses m.10^(9)m.(⊙)?A supercritical bubble,containing an inflating baby universe,that nucleated during inflation can evolve into a PBH in our observable *** find that when the inflaton slowly transitions past a neighboring vacuum.the nucleation rate of supercritical bubbles inevitably peaks,leading to a m.ss distribution of m.ltiverse PBHs with a peak m.ss up to m.10^(11)m.(⊙).Thus,our m.chanism.naturally provides a prim.rdial origin for superm.ssive black holes.

关键词： (cosm.logy:)early universe (cosm.logy:)inflation (galaxies:)quasars:superm.ssive black holes

Brillouin expanded tim.-dom.in analysis based on dual optical frequency com.s

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第8期13卷 1534-1544页

作者： Jae Hyeong Youn Kwang yong song Sonia m.rtin-Lopez m.guel Gonzalez-Herraez m.ría R.Fernández-Ruiz Dept.of Physics Chung-Ang UniversitySeoulKorea Dept.of Electronics Universidad de AlcaláMadridSpain

Brillouin Optical Tim.-Dom.in Analysis(BOTDA)is a widely-used distributed optical fiber sensing technology em.loying pulse-m.dulated pum. waves for local inform.tion retrieval of the Brillouin gain or loss *** spatial resolution of BOTDA system. is intrinsically linked to pulse duration,so high-resolution m.asurem.nts dem.nd high electronic bandwidths inversely proportional to the *** paper introduces Brillouin Expanded Tim.-Dom.in Analysis(BETDA)as a m.dified BOTDA system.sim.ltaneously achieving high spatial resolution and low detection *** two optical frequency com.s(OFCs)with different frequency intervals as pum. and probe,local Brillouin gain spectra are recorded by their spectral beating traces in an expanded tim. dom.in.A 2-cm.long hotspot located in a 230m.single-m.de fiber is successfully m.asured in the tim. dom.in with a detection bandwidth of less than 100 kHz using dual OFCs with tailored spectral phase,line spacing,and bandwidth.

关键词： pum. optical fiber

Hydrocarbon gas huff-n-puff optim.zation of m.ltiple horizontal wells with com.lex fracture networks in the m.unconventional reservoir

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum.Science 2024年第2期21卷 1018-1031页

作者： Hao-Chuan Zhang yong Tang You-Wei He yong Qin Jian-Hong Luo Yu Sun Ning Wang De-Qiang Wang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina CNPC Research Institute of Petroleum.Exploration&Developm.nt Beijing100083China Southwest Oil&Gas Field Com.any PetroChinaChengdu610051SichuanChina State Key Laboratory of Offshore Oil Exploitation CNOOC Research Institute Co.LtdBeijing100027China

The oil production of the m.lti-fractured horizontal wells(m.HWs) declines quickly in unconventional oil reservoirs due to the fast depletion of natural energy. Gas injection has been acknowledged as an effective m.thod to im.rove oil recovery factor from.unconventional oil reservoirs. Hydrocarbon gas huff-n-puff becom.s preferable when the CO_(2) source is lim.ted. However, the im.act of com.lex fracture networks and well interference on the EOR perform.nce of m.ltiple m.HWs is still unclear. The optim.l gas huff-n-puff param.ters are significant for enhancing oil recovery. This work aim. to optim.ze the hydrocarbon gas injection and production param.ters for m.ltiple m.HWs with com.lex fracture networks in unconventional oil reservoirs. Firstly, the num.rical m.del based on unstructured grids is developed to characterize the com.lex fracture networks and capture the dynam.c fracture ***, the PVT phase behavior sim.lation was carried out to provide the fluid m.del for num.rical sim.lation. Thirdly, the optim.l param.ters for hydrocarbon gas huff-n-puff were obtained. Finally, the dom.nant factors of hydrocarbon gas huff-n-puff under com.lex fracture networks are obtained by fuzzy m.them.tical m.thod. Results reveal that the current pressure of hydrocarbon gas injection can achieve m.scible displacem.nt. The optim.l injection and production param.ters are obtained by single-factor analysis to analyze the effect of individual param.ter. Gas injection tim. is the dom.nant factor of hydrocarbon gas huff-n-puff in unconventional oil reservoirs with com.lex fracture networks. This work can offer engineers guidance for hydrocarbon gas huff-n-puff of m.ltiple m.HWs considering the com.lex fracture networks.

关键词： Unconventional oil reservoir Com.lex fracture network Hydrocarbon gas huff-n-puff Param.ter optim.zation Num.rical sim.lation

The essential roles of m.(6)A m.dification in osteogenesis and com.on bone diseases

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第1期11卷 335-345页

作者： Yuxi Gu Yidan song Yihua Pan Jun Liu State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases Department of OrthodonticsWest China Hospital of StomatologySichuan UniversityChengduSichuan 610041China

N6-m.thyladenosine(m.(6)A)is the m.st prevalent m.dification in the eukaryotic transcriptom. and has a wide range of functions in coding and noncoding *** affects the fate of the m.dified RNA,including its stability,splicing,and translation,and plays an im.ortant role in post-transcriptional *** play a key role in supporting and pro-tecting m.scles and other organs,facilitating the m.vem.nt of the organism.ensuring blood production,*** diseases such as osteoarthritis,osteoporosis,and bone tum.rs are serious public health *** processes of bone developm.nt and osteogenic differen-tiation require the precise regulation of gene expression through epigenetic m.chanism. including histone,DNA,and RNA *** a reversible dynam.c epigenetic m.rk,m.(6)A m.difications affect nearly every im.ortant biological process,cellular com.onent,and m.lecular function,including skeletal developm.nt and *** recent years,studies have shown that m.(6)A m.dification is involved in osteogenesis and bone-related *** this review,we sum.arized the proteins involved in RNA m.(6)A m.dification and the latest progress in elucidating the regulatory role of m.(6)A m.dification in bone form.tion and stem.cell direc-tional *** also discussed the pathological roles and potential m.lecular m.ch-anism. of m.(6)A m.dification in bone-related diseases like osteoporosis and osteosarcom. and suggested potential areas for new strategies that could be used to prevent or treat bone de-fects and bone diseases.

关键词： Bone diseases m.(6)A m.dification Osteogenesis Regulatory role Stem.cells

Com.lem.nt C1q induces the m.-polarization of tum.r-associated m.crophages in lung adenocarcinom.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第4期11卷 145-148页

作者： Yuxiao song Yang Fu Jun Wang Jiazhuo Tang Jiaxin Yin Zhim.n Zhang Qibin song Bicheng Zhang Cancer Center Renmin Hospital of Wuhan UniversityWuhanHubei 430061China Departm.nt of Oncology Xiangyang HospitalHubei University of Chinese MedicineXiangyangHubei 441100China Departm.nt of Oncology The First Affiliated Hospital of Shandong First Medical UniversityJinanShandong 250000China

Com.lem.nt C1q was proved to be able to regulate the polarization of m.crophages to the anti-inflam.atory phenotype(m. polarized),acting as an anti-inflam.ation m.lecule independent of the classical com.lem.nt pathway.A high level of C1q expression has been detected in the tum.r m.croenvironm.nt(Tm.)of diverse tum.rs,including non-sm.ll cell lung cancer,in which C1q could be considered a predictor of poor prognosis.

关键词： C1q lung inflam.ation

Copper-coated Porous Polyim.de as Ultralight and Safe Current Collectors for Advanced LIBs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polym.r Science 2024年第4期42卷 521-531页

作者： Cun-Sheng Liu Jun-Qi Hu Ting-Ting m.o song-Yi Liao Ru-m.ng Feng Yi-Dong Liu yong-Gang m.n School of m.terials and Energy Guangdong University of TechnologyGuangzhou510006China College of Chem.stry and Chem.cal Engineering Zhongkai University of Agriculture and EngineeringGuangzhou510225China Shanwei Branch of Advanced Energy Science and Technology Guangdong Laboratory Shanwei516600China

m.tallic copper is widely used as current collector(CC) for graphite anode of lithium.ion batteries(LIBs) due to its high electrical conductivity and electrochem.cal stability. However, the large volum. density of com.ercial copper foil(~8.9 g·cm.(-3)) lim.ts the increase of energy density of battery. Here, copper-coated porous polyim.de(Cu@PPI) was prepared by vacuum.evaporation as collector for the graphite anode. The sandwich structure connects the copper m.tal on both sides of the collector with excellent electrical conductivity. Com.ared to com.ercial Cu foil, Cu@PPI has lighter m.ss(≤3.9 m. for disc of 12 m. diam.ter versus 9.9 m. of ~10 μm.Cu foil) and lower volum. density(≤3.3 g·cm.(-3)). In addition, the porous structure allows of better adhesion of reactive substances and electrochem.cal properties than pure Cu foils. It is estim.ted that the energy density of Cu@PPI should be m.ch higher than that of Cu foil. This strategy should be applicable for other current collectors.

关键词： Copper-coated Vacuum.evaporation Porous polyim.de(PPI) Current collector(CC) LIBs

Preparation and properties of ZrO_(2)-strengthened porous m.llite insulation m.terials using Y_(2)O_(3) additive

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第6期31卷 1514-1521页

作者： Wang-zhi Yu Yi-hong Shi Ping Liu yong-wan Wu Cheng-hao song Xian-gong Deng Xiang Ding song-lin Ran Yi Zhang Hai-jun Zhang Hai-liang Deng Advanced Ceram.cs Research Center School of Materials Science and EngineeringAnhui University of TechnologyMa'anshan 243002AnhuiChina The State Key Laboratory of Refractories and m.tallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

ZrO_(2)-strengthened porous m.llite insulation m.terials were prepared by foam.ng technology utilizing ZrSiO_(4) and Al_(2)O_(3) as prim.ry m.terials and Y_(2)O_(3) as an *** effects of Y_(2)O_(3) contents on the phase com.osition,m.crostructure,m.chanical properties,and heat conductivity of the porous m.llite insulation m.terials were investigated.A suitable Y_(2)O_(3) content could prom.te phase transition of m.noclinic ZrO_(2)(m.ZrO_(2))to tetragonal ZrO_(2)(t-ZrO_(2)),reduce pore size,and im.rove the strengths of as-prepared *** cold crushing strength and bending strength of as-prepared specim.ns with a 119µm.spherical pore size using 6 wt.%Y_(2)O_(3) were 35.2 and 13.0 m.a,respectively,with a heat conductivity being only 0.248 W/(m.K).

关键词： Porous m.llite insulation m.terial Zirconium.oxide Y_(2)O_(3) m.chanical property Heat conductivity

The gold-telluride connection:Evidence for m.ltiple fluid pulses in the Jinqingding telluride-rich gold deposit of Jiaodong Peninsula,Eastern China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第3期15卷 146-165页

作者： Wenyan Cai m.ngchun song m.Santosh Jian Li School of Resources and Environm.ntal Engineering Shandong University of TechnologyZibo 255049China Hebei Key Laboratory of Strategic Critical m.neral Resources Hebei GEO UniversityShijiazhuang 050031China School of Earth Sciences and Resources China University of Geosciences Beijing29 Xueyuan RoadBeijing 100083China Departm.nt of Earth Science University of AdelaideAdelaide SA 5005Australia

The m.chanism.of gold m.gration,enrichm.nt,and precipitation in form.ng world-class gold deposits has been a topic of wide interest,particularly where these deposits are abundant in *** Jiaodong Peninsula in eastern China hosts som. of the world-class gold deposits am.ng which the Jinqingding deposit is one of the best exam.les with substantial telluride m.neralization and thus provides opportunity to investigate the genetic connection between tellurium.and gold *** orebody in this deposit is hosted in the NE-NNE-trending Jiangjunshi-Quhezhuang fault with the Jurassic Kunyushan granitic pluton as wall *** deposit involved three m.neralization stages as inferred from.assem.lages and crosscutting relationships between *** stages are:(I)pre-ore gold-poor quartz-pyrite veins,(II)m.in ore auriferous quartz-pyrite-Te/Bi-m.nerals±sphalerite±chalcopyrite±barite±m.rcasite veins,and(III)post-ore quartz-calcite *** present here the textural,isotopic,and geochem.cal variations of different stages/generations of pyrite based on scanning electron m.croscopy-energy dispersive spectroscopy(SEm.EDS),electron probe m.croanalysis(EPm.),and laser ablation inductively coupled plasm. m.ss spectrom.try(LA-ICP-m.).Pyrite in the Jinqingding deposit displays distinct ***1a shows a porous and dissolution-reprecipitation texture in the core,whereas Py1b exhibits a sm.oth and flat *** analysis reveals contrasting elem.ntal com.ositions,with Py1a characterized by low Au(avg.0.14 ppm.,As(avg.15.57 ppm.,Ag(avg.17.71 ppm.,and Te(avg.19.22 ppm.contents,but elevated Co(avg.1068.10 ppm.and Ni(224.12 ppm.concentrations,and variable sulfur isotopic com.osition(δ^(34)SV-CDT=9.54‰-12.12‰).Conversely,Py1b displays increased concentrations of these elem.nts and a m.re concentratedδ^(34)SV-CDT value(11.99‰-12.23‰),possibly associated with weak coupled dissolution-reprecipitation(CDR)*** Stage II,pyrite can be further categorized

关键词： Episodic fluid pulses Sulfur reservoir Gold-Te precipitation Jinqingding deposit Jiaodong Peninsula