检索结果-内蒙古大学图书馆

Eu3+ ions doped SrO-CaO-Li2O-B2O3glasses foroptical display material application

Journal of Physics: Conference Series 2020年第1期1485卷

作者： A.R. Venugopal J. Kaewkhao J Abhiram K M Rajashekara R. Rajaramakrishna N. G. Pramod Chethan Rao Department of Physic B.G.S R&D Centre SJC Institute of Technology Chikkaballapur Karnataka India Department of Physics Brindavan College of Engineering Bangalore 560063 India Department of PG studies and research in physics The National College Jayanagar Bangalore - 560070 Center of Excellence in Glass Technology and Materials Science (CEGM) Nakhon Pathom Rajabhat University Nakhon Pathom 73000 Thailand Department of Physics SDM Institute of Technology Belathangady Ujire Karnataka India - 574240

The glass systems with composition 20SrO-5CaO-40Li2O-(35-x) B2O3-x Eu2O3 (x = 0.3, 0.5 and 1 mol%) glasses were prepared by melt quenching technique to study absorption and luminescence properties and understand their lasing properties. Thepresent work reports the studies on Physical, Optical and luminescence properties of the prepared glass systems. The photoluminescence (PL) intensity of the glass increases with increase in Eu2O3 content up to 1mol%. The increase in the density and decrease in molar volume reveals the close packing of glass network. For Eu3+ emission the most intense red emission has been observed at the wavelength of 614nm for the transitions5D0 →7F2. The phonon energy was measured from phonon side band spectra which showed 1280cm−1, typical value for the borate glasses. Luminescence intensity ratio and lifetime analysis has been measured and discussed in the present work. The present glasses are very near to reddish orangeregion and thus can be key entrant for optical display device applications.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bone Imaging: Gold Nanoclusters for NIR-II Fluorescence Imaging of Bones (Small 43/2020)

引用

Small 2020年第43期16卷

作者： Deling Li Qiang Liu Qingrong Qi Hui Shi En-Chi Hsu Weiyu Chen Wenli Yuan Yifan Wu Sien Lin Yitian Zeng Zunyu Xiao Lingyun Xu Yanrong Zhang Tanya Stoyanova Wang Jia Zhen Cheng Department of Neurosurgery Beijing Tiantan Hospital Capital Medical University Beijing 100070 China College of Chemistry and Environmental Protection Engineering Southwest Minzu University Chengdu Sichuan 610041 China Molecular Imaging Program at Stanford (MIPS) Bio-X Program and Department of Radiology Stanford University Palo Alto CA 94305 USA West China School of Pharmacy Sichuan University Chengdu 610041 China Department of Radiology Canary Center at Stanford for Cancer Early Detection Stanford University Palo Alto CA 94304 USA Department of Medicine Stanford University School of Medicine Palo Alto CA 94305 USA Department of Materials Science and Engineering Stanford University Palo Alto CA 94304 USA

来源：评论

学校读者我要写书评

暂无评论

Effects of Angular Fillers on Thermal Runaway of Lithium-Ion Battery

引用

Journal of materials science & Technology 2016年第11期32卷 1117-1121页

作者： Meng Wang Anh V.Le Yang Shi Daniel J.Noelle Hyojung Yoon Minghao Zhang Y.Shirley Meng Yu Qiao Department of Structural Engineering University of California-San Diego Program of Materials Science and Engineering University of California-San Diego Department of Nanoengineering University of California-San Diego

By adding 1 wt% damage homogenizer（DH）, i.e. carbon black microparticles, into the electrodes of lithiumion batteries, thermal runaway can be mitigated as the battery cells are subjected to impact loadings. In a drop tower test, the generated heat of the modified cells is reduced by nearly 40%, compared with the reference cells. This phenomenon may be attributed to the weakening effect of the carbon black *** shape of the filler grains does not have a pronounced influence on the temperature profile.

关键词： Lithium-ion battery Thermal runaway Micro-particulate Nail Impact

来源：评论

学校读者我要写书评

暂无评论

Tendencies and particularities in thermic inversion episodes in the ciuc basin – Eastern Carpathians, Romania 17

Tendencies and particularities in thermic inversion episodes...

引用

17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Petres, Sándor Korodi, Attila Keresztes, Réka Szép, Róbert University Politehnica of Bucharest Faculty of Applied Chemistry and Materials Science & Sapientia University Faculty of Economics Socio-Human Sciences and Engineering Romania Bucharest University of Economics Studies International Business and Economics & Sapientia University Faculty of Economics Socio-Human Sciences and Engineering Romania Sapientia University Faculty of Economics Socio-Human Sciences and Engineering Romania

ISBN: (纸本)9786197408263

The present paper analyze the thermic inversions, vertical thermic gradients and daily thermic differences determined at the Miercurea-Ciuc, Jigodin-Bai, Bucin and Toaca meteorology stations, based on hourly data for the 2006-2015 period. The analysis of the thermic inversions in the Ciuc Basin was made by measuring differences of the temperatures between the Miercurea-Ciuc (661 m altitude), Jigodin-Bai (710 m altitude), Bucin (1282 m altitude) and Toaca (1898 m altitude) meteorology stations, which are situated at differences of altitude of 49, 572 and 616 m. In the Ciuc Basin, the thermic inversions appear frequently every month and season of the year, especially at the base of the depression, because its closed Carpathian basin characteristics. Due to the local natural conditions and anthropic interventions, there is increased static stability in term of Brunt–Väisälä frequency leading to inversion periods, a relationship also investigated. The temperature behavior is highlighted by a maximum and a minimum value;the maximum value occurs especially in the afternoon and in the early evening, and the minimum values occur especially in the early morning. © SGEM 2017. All Rights Reserved.

关键词： Meteorology

来源：评论

学校读者我要写书评

暂无评论

Cure monitoring and characterization of epoxy/amine networks, modified with 1-butyl-3-bethylimidazolium tetrafluoroborate ionic liquid 32

Cure monitoring and characterization of epoxy/amine networks...

引用

32nd Technical Conference of the American Society for Composites 2017

作者： Prozorovska, Liudmyla Muralidharan, Nitin Westover, Andrew Pint, Cary Adams, Douglas Department of Civil and Environmental Engineering Vanderbilt University NashvilleTN37235 United States Interdisciplinary Materials Science Program Vanderbilt University NashvilleTN37225 United States Department of Mechanical Engineering Vanderbilt University NashvilleTN37235 United States Material Science and Technology Division Oak Ridge National Laboratory Oak RidgeTN37831 United States

ISBN: (纸本)9781510853065

In the present work, electrochemical impedance spectroscopy (EIS) was employed for cure monitoring of bisphenol A/F based epoxy resin-polyoxypropylenediamine hardener systems modified with various concentrations of 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) ionic liquid (IL). These systems exhibited phase separation induced by an increase in the molar mass through the curing of the resin. The progress of the curing process was accompanied by a steady increase of impedance for all types of samples, as expected, due to the increasing viscosity of the medium for increased degree of cure. The results were compared to those of unmodified resin-hardener systems. The sensitivity of EIS as a cure monitoring technique increased dramatically with the addition of the IL. The cure kinetics of the epoxy resin was characterized by differential scanning calorimetry and the data were used to create a model for comparison with the EIS results. The change of the ionic conductivity during curing as a function of IL concentration and the effect of IL loading on mechanical properties of the resin were also studied. We demonstrate that [BMIM]BF4 loading of 5wt.% increased the room temperature ionic conductivity of the fully cured product by an order of magnitude with only a 2.5% reduction in compression strength from that of pure epoxy. Copyright © (2017) by DEStech Publications, Inc. All rights reserved.

关键词： Epoxy resins

来源：评论

学校读者我要写书评

暂无评论

Some Aspects on Complementarity and Heterodoxy in Non-Classical Logics

引用

Procedia Computer science 2018年 126卷 1253-1260页

作者： Jair M. Abe Seiki Akama Kazumi Nakamatsu João I. da Silva Filho Graduate Program in Production Engineering Paulista University R. Dr. Bacelar 1212 CEP 04026-002 São Paulo – SP Brazil Institute For Advanced Studies – University of São Paulo Brazil C-Republic Tokyo Japan School of Human Science and Environment – University of Hyogo Japan Santa Cecília University Brazil

In this work we discuss complementarity and heterodoxy in non-classical logics, exemplifying with the paraconsistent C n systems introduced and studied mainly by Costa.

关键词： complementarity heterodoxy heterodox logics non-classical logics paraconsistent logic

来源：评论

学校读者我要写书评

暂无评论

Origin of the current-driven breakdown in vanadium oxides: Thermal versus electronic

引用

Physical Review B 2018年第19期98卷 195144-195144页

作者： I. Valmianski P. Y. Wang S. Wang Juan Gabriel Ramirez S. Guénon Ivan K. Schuller Department of Physics and Center for Advanced Nanoscience University of California San Diego La Jolla California 92093 USA Materials Science and Engineering Program University of California San Diego La Jolla California 92093 USA Department of Physics Universidad de los Andes Bogotá 111711 Colombia Physikalisches Institut-Nano Atomoptics Tubingen Germany

We report the existence of two competing mechanisms in the current-driven electrical breakdown of vanadium sesquioxide (V2O3) and vanadium dioxide (VO2) nanodevices. Our experiments and simulations show that the competition between a purely electronic (PE) mechanism and an electrothermal (ET) mechanism, suppressed in nanoscale devices, explains the current-driven insulator-to-metal phase transition (IMT). We find that the relative contribution of PE and ET effects is dictated by thermal coupling and resistivity, a discovery which disambiguates a long-standing controversy surrounding the physical nature of the current-driven IMT in vanadium oxides. Furthermore, we show that the electrothermally driven IMT occurs through a nanoscopic surface-confined filament. This nanoconfined filament has a very large thermal gradient, thus generating a large Seebeck-effect electric field.

关键词： Metal-insulator transition Thermopower Mott insulators Nanostructures Strongly correlated systems Thermoelectrics Thin films Transition metal oxides

来源：评论

学校读者我要写书评

暂无评论

Perovskite Solar Cells: Enhancing Efficiency and Stability of Photovoltaic Cells by Using Perovskite/Zr-MOF Heterojunction Including Bilayer and Hybrid Structures (Adv. Sci. 5/2019)

引用

Advanced science 2019年第5期6卷 1970030-1970030页

作者： Chia-Chen Lee Chih-I Chen Yu-Te Liao Kevin C.-W. Wu Chu-Chen Chueh Department of Chemical Engineering National Taiwan University Taipei 10617 Taiwan Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei 10617 Taiwan Center of Atomic Initiative for New Materials (AI-MAT) National Taiwan University Taipei 10617 Taiwan International Graduate Program of Molecular Science and Technology (NTU-MST) National Taiwan University Taipei 10617 Taiwan

来源：评论

学校读者我要写书评

暂无评论

Disagreement in middle ear volume estimation between tympanometry and three-dimensional volume reconstruction in the context of tympanic membrane perforation

引用

Journal of Otology 2017年第2期12卷 74-79页

作者： David J.Carpenter Debara L.Tucci David M.Kaylie Dennis O.Frank-Ito Division of Head and Neck Surgery&Communication Sciences Department of SurgeryDuke University Medical CenterDurhamNCUSA Computational Biology&Bioinformatics PhD Program Duke UniversityDurhamNCUSA Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNCUSA

Introduction: Middle ear volume(MEV) is a clinically relevant parameter across middle ear diseases. MEV values between these techniques have never before been tested for agreement in ears with perforated tympanic membranes(TMs).Methods: Middle ears were identified from 36 patients ranging 18-89 years of age with TM perforations who underwent tympanometry and temporal bone computed tomography(CT) between 2005 and 2015. MEVs calculated by both tympanometry and three-dimensional volume reconstruction(3DVR) were analyzed for agreement using Bland Altman plots. The differences between tympanometric and 3DVR MEV values for each given middle ear were characterized across MEV quartiles(1= smallest; 4= largest) and across increasing states of middle ear disease using Kruskale Wallis and Wilcoxon testing with Bonferroni ***: Bland Altman plots demonstrated significant disagreement between MEV measurement techniques. Differences between tympanometric(T) and 3DVR MEV values were significantly greater with increasing average(i.e.(Tt3DVR)/2)) MEV per linear regression(p < 0.0001). Significance was demonstrated between fourth and first average MEV quartiles(p= 0.0024), fourth and second quartiles(p= 0.0024), third and first quartiles(p= 0.0048), and third and second quartiles(p= 0.048). Absolute MEV difference was not significantly different across varying states of middle ear disease(p= 0.44).Conclusion: Statistically and clinically significant disagreement was demonstrated between tympanometric and 3DVR MEV values. studies that vary in MEV estimation techniques may be expected to demonstrate significantly different results. These preliminary results suggest that clinicians should endeavor to seek further confirmation when interpreting high tympanometric MEV values.

关键词： Middle ear volume Tympanometry Three-dimensional volume reconstruction Tympanic membrane perforation

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Stretchable, dynamic covalent polymers for soft, long-lived bioresorbable electronic stimulators designed to facilitate neuromuscular regeneration

引用

Nature communications 2021年第1期12卷 415页

作者： Yeon Sik Choi Yuan-Yu Hsueh Jahyun Koo Quansan Yang Raudel Avila Buwei Hu Zhaoqian Xie Geumbee Lee Zheng Ning Claire Liu Yameng Xu Young Joong Lee Weikang Zhao Jun Fang Yujun Deng Seung Min Lee Abraham Vázquez-Guardado Iwona Stepien Ying Yan Joseph W Song Chad Haney Yong Suk Oh Wentai Liu Hong-Joon Yoon Anthony Banks Matthew R MacEwan Guillermo A Ameer Wilson Z Ray Yonggang Huang Tao Xie Colin K Franz Song Li John A Rogers Center for Bio-Integrated Electronics Northwestern University Evanston IL 60208 USA. Querrey Simpson Institute for Biotechnology Northwestern University Evanston IL 60208 USA. Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA. Department of Bioengineering University of California Los Angeles Los Angeles CA 90095 USA. Division of Plastic and Reconstructive Surgery Department of Surgery National Cheng Kung University Hospital College of Medicine National Cheng Kung University Tainan 70456 Taiwan. International Research Center for Wound Repair and Regeneration National Cheng Kung University Tainan 70456 Taiwan. School of Biomedical Engineering Korea University Seoul 02841 Republic of Korea. Interdisciplinary Program in Precision Public Health Korea University Seoul 02841 Republic of Korea. Department of Mechanical Engineering Northwestern University Evanston IL 60208 USA. Department of Medicine University of California Los Angeles Los Angeles CA 90095 USA. State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology 116024 Dalian China. Department of Engineering Mechanics Dalian University of Technology 116024 Dalian China. International Research Center for Computational Mechanics Dalian University of Technology 116024 Dalian China. State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University 310027 Hangzhou China. Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA. State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University 200240 Shanghai China. Center for Developmental Therapeutics Chemistry Life Processes Institute Northwestern University Evanston IL 60208 USA. Department of Neurological Surgery Washington University School of Medicine St. Louis MO 63110 USA. Center for Advanced Molecular Imaging Northwestern University Evanston IL

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：