检索结果-南通市图书馆

chinese Journal of Polymer Science 2024年第10期42卷 1442-1448,I0008页

作者： Ya-Wen liu Huan liang Hong-tu Xu en-Jian He Zhi-Jun Yang Yi-Xuan Wang Yen Wei Zhen li Yan Ji the Key laboratory of Bioorganic Phosphorus chemistry&chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing100084China Advanced Materials and energy center Academy of Aerospace Science and InnovationBeijing100088China

Realizing multiple locked shapes in pre-oriented liquid crystal elastomers(lcEs)is highly desired for diversifying deformations and enhancing ***,conventional lcEs only deform between two shapes for each actuation cycle upon liquid crystal-isotropic phase transitions induced by external ***,we propose to regulate the actuation modes and the locked shapes of a pre-orientated epoxy lcE by combining dynamic covalent bonds with cooling-rate-mediated *** actuation modes can be adjusted on demand by exchange reactions of dynamic covalent *** from the established actuation modes,such as elongation,bending,and spiraling,the epoxy lcE displays varied locked shapes at room temperature under different cooling *** mediums are utilized to control the cooling rate,including water,silicone oil,and copper *** approach provides a novel way for regulating the actuation modes and locked shapes of cuttingedge intelligent devices.

关键词： liquid crystal elastomer Epoxy Dynamic covalent bond Vitrimer cooling rate

Na_(3)P interphase reduces Na nucleation energy enabling stable anode-less sodium metal batteries

在线全文

学校读者我要写书评

暂无评论

Journal of energy chemistry 2024年第9期96卷 448-455页

作者： Haizhao Yang Haifeng lv en Zhou Xiaohao Ji chunnian chen Haolei Yu Zhaowei Sun Dawei Zhang Hongchang Jin Xianghua Kong Hengxing Ji Department of chemistry and chemical engineering Hefei University of TechnologyHefei 230009AnhuiChina Hefei National Research center for Physical Sciences at the Microscale School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

Sodium metal batteries(SMBs)are rising as viable alternatives to lithium-ion systems due to their superior energy density and sodium's relative ***,SMBs face significant impediments,particularly the exceedingly high negative-to-positive capacity ratios(N/P ratios)which severely encumber energy density and hinder their practical ***,a novel nucleophilic Na_(3)P interphase on aluminum foil has been designed to significantly lower the nucleation energy barrier for sodium atom deposition,resulting in a remarkable reduction of nucleation overpotential and efficient mitigation of dendritic growth at high sodium deposition of 5 mA h cm^(−2).the interphase promotes stable cycling in anode-less SMB configurations with a low N/P ratio of 1.4 and high cathode mass loading of 11.5 mg cm^(−2),and demonstrates a substantial increase in high capacity retention of 92.4%after 500 cycles even under 1 c rate *** innovation signifies a promising leap forward in the development of high-energy-density,anode-less SMBs,offering a potential solution to the longstanding issues of cycle stability and energy efficiency.

关键词： Anode-less Phosphorus anode Nucleation buffer layer Sodium metal Dendrite-free

In situ tEM investigation of electron irradiation and aging-induced high-density nanoprecipitates in an Mg-10Gd-3Y-1Zn-0.5Zr alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： M.lv H.l.Ge Q.Q.Jin X.H.Shao Y.t.Zhou B.Zhang X.l.Ma Shenyang National laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and engineering University of Science and Technology of ChinaShenyang 110016China Materials Science and engineering Research center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce high-density precipitates in an Mg-10Gd-3Y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve the *** results show that the hardness of the Mg alloy after irradiation for 10 h and aging for 9 h at 250℃ is 1.64 GPa,which is approximately 64% higher than that of the samples before being *** is mainly attributed to γ'precipitates on the basal plane after irradiation and the high-density nanoscale β'precipitates on the prismatic plane after aging,which should be closely related to the irradiation-induced homogenous *** latter plays a key role in precipitation *** result paves a way to improve the mechanical properties of metallic materials by tailoring the precipitation through irradiation and aging.

关键词： Mg alloy Electron beam irradiation Hardening Precipitates In-situ tEM

clinical validation of the early embryo viability assessment system: Analysis for the blastocyst morphology and pregnancy outcomes

在线全文

学校读者我要写书评

暂无评论

Asian pacific Journal of Reproduction 2024年第5期13卷 219-227页

作者： Vu D Hop An M cuong Phi t t Anh Nguyen t l Huong le Hoang Nguyen V Hanh Assisted Reproductive technology centre Tam Anh General HospitalHanoiVietnam Institute of Biotechnology Vietnam Academy of Science and TechnologyHanoiVietnam

Objective:to determine the relationship between the early embryo viability assessment(EEVA)and blastocyst morphological parameters and pregnancy ***:this retrospective cohort study was conducted on 291 intracytoplasmic sperm injection cycles including 2522 embryos with indications of prolonging embryo culture to the blastocyst stage in the Genea embryo review incubator,and 511 single vitrified-warmed blastocyst transfer cycles from January 2020 to June *** EEVA system produced an EEVA score from E1(best)to E5(worse)for the potential of blastocyst *** morphology was *** association between the EEVA score and each type of blastocyst morphology,implantation rate,clinical pregnancy,and ongoing pregnancy were assessed using generalized estimating ***:the inner cell mass A(IcM A),trophectoderm A(tE A),blastocoele expansion degree of 3,4,5,6,7 rates were higher with lower the EEVA *** adjusted odd ratio(aOR)(E5 vs E1)was 0.3 for IcM A,0.174 for tE A and 0.210 for Bl3,4,5,6,7(all Pting a significant association between lower EEVA scores and improved embryo *** implantation,clinical pregnancy,and ongoing pregnancy rate were also higher with lower the EEVA *** aOR of E5 vs E1 was 0.245 for implantation,0.185 for clinical pregnancy and 0.200 for ongoing pregnancy rate(Pconclusions:there were associations between blastocyst morphology,pregnancy outcome and EEVA *** good blastocyst morphology and pregnancy outcomes are higher with lower the EEVA score.

关键词： Automated embryo assessment Blastocyst Early embryo viability assessment Genea embryo review incubator

Editorial for Multiscale&Multifield coupling in Geomechanics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical engineering 2024年第6期16卷 1919-1921页

作者： Min Wang Pengzhi Pan Andrew H.c.chan Y.t.Feng t-3 Fluid Dynamics and Solid Mechanics Theoretical DivisionLos Alamos National LaboratoryNew MexicoUSA Institute of Rock and Soil Mechanics Chinese Academy of SciencesWuhanChina School of engineering University of TasmaniaTasmaniaAustralia college of engineering Swansea UniversityWalesUK

We are delighted to serve as guest editors for this special issue in the Journal of Rock Mechanics and Geotechnical *** purpose of this special issue is dedicated to gathering the latest research work on Multiscale&Multifield coupling in Geomechanics,where we delve into the intricate interplay of various fields and scales that govern the behavior of *** total,30 manuscripts from USA,china,UK,Germany,canada,India and United Arab Emirates are selected to be included in this issue.

关键词： materials. gathering mechanics

磁序与拓扑的耦合:从基础物理到拓扑磁电子学

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

物理学报 2024年第1期73卷 24-30页

作者：刘恩克中国科学院物理研究所磁学国家重点实验室北京100190

磁学与拓扑物理是两大较为成熟的学科,二者的结合是新一代磁电子学的需求和基础.磁性拓扑材料是磁序与拓扑物理耦合的重要产物,为新兴的拓扑物理提供了材料载体和调控自由度.磁性外尔半金属实现了时间反演对称破缺下的外尔费米子拓扑物... 详细信息

磁学与拓扑物理是两大较为成熟的学科,二者的结合是新一代磁电子学的需求和基础.磁性拓扑材料是磁序与拓扑物理耦合的重要产物,为新兴的拓扑物理提供了材料载体和调控自由度.磁性外尔半金属实现了时间反演对称破缺下的外尔费米子拓扑物态,通过拓扑增强的贝利曲率产生了一系列新奇的磁/电/热/光效应;而外尔电子与磁序的相互作用也使得拓扑电子物理有望成为磁电子学应用的新原理和驱动力.当前,新物态与新效应的发现是磁性拓扑材料第一阶段的主要任务和特征,而动量空间拓扑电子与实空间磁序的相互作用已经开始进入人们的视野.这两个阶段的深入发展,将为拓扑磁电子学积累必要的物理基础和应用尝试.本文着眼于磁性拓扑材料发展的两个阶段,讲述磁性拓扑材料的提出和实现、均一磁序下的拓扑电子态及新奇物性、局域磁态与拓扑电子的相互作用3个方面,阐述当前领域内的热点内容和发展趋势,并对拓扑磁电子学的未来发展进行了思考和展望,以助力未来拓扑自旋量子器件的快速发展.

关键词：拓扑物理磁性外尔半金属拓扑磁电子学

维普期刊数据库博看期刊

Mechanical Behavior and Failure Mechanism of an As-Extruded Mg-11wt%Y Alloy at Elevated temperature

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(english letters) 2024年第6期37卷 969-981页

作者： lan Zhang Dao-Kui Xu Bao-Jie Wang cui-lan lu Shuo Wang Xiang-Bo Xu Dong-liang Wang Xin lv en-Hou Han School of Materials Science and engineering University of Science and Technology of ChinaShenyang110016China Key laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of environmental and chemical engineering Shenyang Ligong UniversityShenyang110159China Key lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Institute of corrosion Science and technology Guangdong510070China

through carrying out the high-temperature tensile experiments on an as-extruded Mg-11wt%Y alloy at 350℃,400℃,450℃,500℃and 550℃,the mechanical behavior and fracture mechanisms at elevated temperatures are investigated and *** results show that with the increase of temperature,the yield strength and ultimate tensile strength of the alloy increase at first and then decrease,while that the elongation ratio decreases firstly and then *** the sample being tested at 350℃,the values of yield strength,ultimate tensile strength and the elongation ratio are 188 MPa,266 MPa and 11%,*** 400℃,the yield strength and ultimate tensile strength reach the maximum values of,respectively,198 MPa and 277 MPa,but the elongation ratio is the lowest and its value is only 8%.When the applied temperature is increased to 550℃,the values of yield strength and ultimate tensile strength,respectively,decrease to 140 MPa and 192 MPa and the elongation ratio increases to 38%.Failure analysis demonstrates that the fracture surfaces of different samples are mainly composed of plastic dimples and exhibit the typical characteristic of ductile *** observation to the fracture side surfaces indicates that at the temperatures of 350℃and 400℃,microcracks mainly initiate in the interior of Mg_(24)Y_(5)*** the temperatures are 450℃,500℃and 550℃,the cracks preferentially initiate at the Mg_(24)Y_(5)/α-Mg interfaces.

关键词： Mg-Y alloy High-temperature tensile properties Fracture mechanism Failure analysis

Mixing states and secondary formation processes of organic nitrogen-containing single particles in Guangzhou,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

Journal of environmental Sciences 2024年第4期138卷 62-73页

作者： lijun Yun chunlei cheng Suxia Yang Zaihua Wang Mei li Qi en Zhong liyuanMao Sulin liu Xiaoya cheng Duanying chen Fan Yang Zhen Zhou Institute of Mass Spectrometry and Atmospheric environment Guangdong Provincial Engineering Research Center for on-line source apportionment system of air pollutionJinan UniversityGuangzhou 510632China Guangdong-Hongkong-Macao Joint laboratory of collaborative Innovation for environmental Quality Guangzhou 510632China State Key laboratory of loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy ScienceXi’an 710061China Institute for environment and climate Research Jinan UniversityGuangzhou 510632China Guangdong Academy of Sciences Institute of Resources Utilization and Rare Earth DevelopmentGuangzhou 510650China environmental Monitoring Station of Pudong New District Shanghai 201200China

Organic nitrogen(ON)compounds play a significant role in the light absorption of brown carbon and the formation of organic aerosols,however,the mixing state,secondary formation processes,and influencing factors of ON compounds are still *** paper reports on the mixing state of ON-containing particles based on measurements obtained using a highperformance single particle aerosol mass spectrometer in January 2020 in *** ON-containing particles accounted for 21% of the total detected single particles,and the particle count and number fraction of the ON-containing particles were two times higher at night than during the *** prominent increase in the content of ON-containing particles with the enhancement of NO_xmainly occurred at night,and accompanied by high relative humidity and nitrate,which were associated with heterogeneous reactions between organics and gaseous NO_(x)and/or NO_(3)*** synchronous decreases in ON-containing particles and the mass absorption coefficient of water-soluble extracts at 365 nm in the afternoon may be associated with photo-bleaching of the ON species in the *** addition,the positive matrix factorization analysis found five factors dominated the formation processes of ON particles,and the nitrate factor(33%)mainly contributed to the production of ON particles at *** results of this study provide unique insights into the mixing states and secondary formation processes of the ON-containing particles.

关键词： Organic nitrogen compounds Single particles Mixing state Secondary formation Nighttime chemistry

A novel clinical data management platform for acute pancreatitis

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第8期25卷 711-718页

作者： Shiyin cHen cheng ZHANG Zhi’en WANG Jian ZHANG Wenqiao YU Yanshuai WANG Weiwei SI tingbo lIANG Yun ZHANG Department of Hepatobiliary and Pancreatic Surgery Zhejiang Provincial Key Laboratory of Pancreatic Diseasethe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Department of Rehabilitation Medicine the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Department of comprehensive Intensive care Unit the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

this study presents a multi-center clinical data management platform that facilitates unified and structured management of real-world data and serves as an ideal tool to enhance the quality and progress of clinical research related to severe acute pancreatitis(SAP).the use of the platform enables clinical teams to obtain safe,accurate,structurally unified,traceable,sceneclear,and fully functional real-world medical data in the diagnosis,treatment,and research of acute pancreatitis(AP).

关键词： clinical pancreatitis acute

Microstructure and texture evolution of cu-cr-co-ti alloys during the two-stage cryorolling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第9期43卷 4535-4547页

作者： Jia-Jun Zhang long-Jian li Zhi-Feng liu Zong-Ning chen en-Yu Guo Hui-Jun Kang Ren-Geng li tong-Min Wang Key laboratory of Solidification control and Digital Preparation technology(liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China center of Hyper-Gravity Experimental and Interdisciplinary Research Zhejiang UniversityHangzhou 310058China Ningbo Institute of Dalian University of technology Ningbo 315000China Key laboratory for light-Weight Materials Nanjing Tech UniversityNanjing 210009China

this study entailed an investigation of the mechanical properties,microstructural and texture orientation evolutions of cu-cr-co-ti alloys prepared via twostage cryorolling and intermediate aging *** this end,X-ray diffraction and electron backscatter diffraction were *** results indicate that the two-stage cryorolling and intermediate aging treatments led to the development of profuse twin bundles and significantly enhanced the mechanical *** initial cryorolling led to coplanar slip and developed a strong Y(t)orientation,accelerating the formation of Goss({011})orientation and a Brass-type *** intermediate aging treatment relieved the restriction on dislocation slip and reoriented the grains toward the copper(t)and Z(t)*** Z orientation,with a relatively high volume fraction,dominated the *** cryorolling intensified twinning and shear banding,transforming the copper-type shear bands into Brass-type shear bands with rhomboidal prism *** areas inside the Brasstype shear bands exhibited a Y orientation,and the areas outside the shear bands exhibited a stable Brass-type *** evident decrease in the weighted Schmid factors demonstrated that the two-stage cryorolling and intermediate aging treatment can modify the texture evolution and aid the design of high-performance cu alloys.

关键词： copper alloys two-stage cryorolling Macrotexture evolution Electron backscatter diffraction Schmid factor