Results 81 to 90 of about 25,441 (211)
Garnet and LISICON-type Solid Electrolytes: Synthesis, Performance and Ionic Diffusion Dynamics [PDF]
, 2015 相对于有机液体电解液，无机固体电解质在化学与电化学稳定性方面具有无可比拟的优势，能极大提升锂离子电池安全性能及其循环稳定性，近年来成为可充锂（离子）电池研究者所关注的热点。其中，对Li4SiO4-Li3PO4（LISICON）体系的研究已经有近30年的历史，由于其较低的原料成本、较为容易的合成条件及良好的稳定性，研究者对该体系依然保持着很高的研究兴趣。Garnet型固体电解质是新兴锂离子导体，由于其具有高Li+电导率和良好的稳定性，一问世便引起工作者极大的研究兴趣 ...
王大为
core
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study examines multilingual practices in research interviews, focusing on English lexical insertions in Chinese‐language research interviews with teachers of Chinese in Australian secondary schools, and treating these code‐switches as analytically meaningful rather than incidental.
Chengwen Yuan, Tianwei Zhang, Gary Bonar
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2018 罕遇地震下偏心支撑框架结构需合理有效地增大消能梁段的延性和耗能能力,并减小消能梁段的损伤,以使该种结构能更好地适应当前的抗震要求。基于剪切型消能梁段的力学特性和扩孔型螺栓连接的受剪滑移能力,提出一种扩孔螺栓连接型消能梁段。采用校正的有限元方法对扩孔型螺栓连接和扩孔螺栓连接型消能梁段进行详细分析,以明确相应试件的力学性能。研究结果表明,扩孔螺栓连接型消能梁段具有高延性和强耗能等特点,能有效提高偏心支撑框架结构的抗震性能和震后功能恢复能力,并为偏心支撑框架结构的抗震设计提供新的思路和方法。
胡淑军, 熊进刚, 宋固全
doaj
Zhejiang Daxue xuebao. Lixue ban, 2001 本文在张秉坚[1]改进Barker-Henderson微扰理论的基础上，将理论推广应用到链状分子流体混合物热力学性质的计算.推导过程中采用了Wertheim[2]等人的链成键理论和类似Hino-Prausnitz[3]的流体混合法则，导出了链状方阱势分子流体混合物热力学性质的解析表达式.能够计算热力学一致的Helmhotz自由能、压缩因子、内能和恒容热容.计算结果与文献计算机模拟值吻合良好.
LIANGShi-qiang(梁世强) +4 more
doaj +1 more source
Preparation and Electromagnetic Wave Absorbing Property of SiC Fiber /Epoxy Resin Composites [PDF]
, 2015 本论文对碳化硅（SiC）纤维进行热处理，制备了不同电阻率的SiC纤维；利用不同电阻率的SiC纤维与环氧树脂复合，制备单层、两层和三层复合材料，测试其在X波段下的电磁参数及吸波性能；利用传输线理论，计算预测了纤维电阻率、纤维体积分数、材料厚度和叠层方式对复合材料吸波性能的影响规律，并将实验结果与理论计算结果进行了对比验证。 研究发现，在1000-1500C温度区间，随着热处理温度的升高，SiC纤维的电阻率大幅度降低。当热处理温度达到1500C时，纤维电阻率约为1ohm.cm。随着纤维电阻率的降低 ...
李华展
core
Scientists in power plays: How substantive were scientists' narratives during the COVID‐19 pandemic?
Policy Studies Journal, EarlyView.Abstract Scientists who provide expert advice must engage with policy processes. Little is known about whether and how scientists deal with the political dynamics of policy processes that are inherent to policymaking. We study this question by building on the policy dimension concept within the Narrative Policy Framework.
Jule Ksinsik, Caroline Schlaufer
wiley +1 more source
, 2016 阐述了海洋环境对结构耐久性的影响,介绍了纯聚脲技术的优势以及在港珠澳跨海大桥和胶州湾跨海大桥的应用。通过附着力跟踪测试、扫描电镜(SEM)和Fourier 变换红外光谱(FTIR)实验方法,考察了纯聚脲材料的附着性能,经盐雾老化以及紫外线/ 盐雾循环老化后的表面形貌、结构形态。研究结果显示,纯聚脲材料具有优异的附着能力,抵抗盐雾及紫外线/ 盐雾循环老化的能力较强,纯聚脲技术具有突出的长期防护效果 ...
吕平, 吕平 冯艳珠
core
Policy Studies Journal, EarlyView.ABSTRACT Why did Australia go from the White Australia Policy, which excluded non‐whites, to institutionalizing multiculturalism policy in the 1970s? This question defies traditional political ideologies of the major political parties, which had long supported the White Australia Policy. This article is a rare empirical demonstration of the Five‐Thread
Julius C. S. Mok
wiley +1 more source
Synthesis and Properties of Self-healing Polymers and Electrically Conductive Composites Based on Hydrogen-bonding [PDF]
, 2015 通过模仿生物体自愈合的特性，人工合成可自行感知和修复损伤的聚合物材料是一项富有深远意义的研究。目前聚合物材料在加工和使用过程中容易受到各种外界因素的破坏并产生难以监测的微裂纹，而这些微裂纹正是材料性能退化的起点。作为一种新颖的智能仿生材料，自修复聚合物能够感知并修复这类损伤，避免材料受到进一步破坏，延长材料使用寿命，消除安全隐患，节约维修成本。然而，目前研究的自修复高分子材料大多为绝缘体，使得其在导电领域中的应用受到限制。随着导电高分子材料在电子器件、传感器、能源、信息、航空等领域的广泛应用 ...
谢婷婉
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Policy Studies Journal, EarlyView.ABSTRACT As the Narrative Policy Framework (NPF) begins to unpack issues of power and narratives, the main focus has been on power‐over and domination rather than more transformative notions of power‐to and empowerment. This article draws on insights from gender and policy studies and suggests that the NPF benefits from adopting a multifaceted notion ...
Hilda Broqvist
wiley +1 more source