通讯机构:
[Zhe Wang] S;[Yonggang Tong] C;School of Foreign Studies, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, China<&wdkj&>Hunan Provincial Key Laboratory of Safety Design and Reliability Technology for Engineering vehicles, Changsha University of Science and Technology, Changsha 410114, China
摘要:
The single-phase TiNbZrMox (x = 0, 0.3, 0.5, 0.7, 1) high-entropy alloys (HEAs) were prepared by arc melting. The relation between molybdenum, microstructure, mechanical properties and wear resistance was investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM), universal tensile tester, hardness tester, friction tester, and wear tester. The results showed that TiNbZrMox alloys were composed of a single BCC phase. With the increase of Mo elements, the crystallite size of the as-cast alloy decreased first and then increased, both the alloy strength and hardness were increased and compressive strain plasticity was decreased. TiNbZrMo0.5 has the best comprehensive performance with a yield strength of 1.0 GPa, compressive strength of 1.3 GPa, and hardness of 429 HV; compared with TiNbZrMo0, yield strength increased by 77.32%, compressive strength increased by 25.14%, and hardness increased by 70.24%; and its specific wear rate decreased by 50%, while it's compressive plasticity only decreased by 5%. (C) 2022 Elsevier B.V. All rights reserved.
摘要:
quality goals can sustain motivation, providing researchers with three novel lenses, namely, motivational relevance, episodic future thinking, and the "self-as-doer" construct. Chapter 7 provides a concise overview of self-determination theory, together with its six interdependent mini-theories, and elaborates on how it contributes to motivation and engagement through dialogic interactions between teachers and students.Part 3 (Chapters 8-11) explores motivation from "selves approaches". Chapter 8 by Peter D. MacIntyre presents an overview of the L2 Motivational Self System and explains how it evolves from the self-theory. In Chapter 9, Mostafa Papi endeavors to test the L2 Motivational Self System by highlighting how it can be adapted to empower language teaching practice in instructional settings. In Chapter 10, Amy Thompson focuses on her experience of learning a Language other than English (LOTE) in rural America and explains how the projection of an ideal L2 self helps to maximize learning potential, regardless of limited language learning resources. We have to keep in mind, though, that even if potential language learners share the same context, their perception and experience will still be unique, hence the differences in motivation. In a similar vein, Chapter 11 examines the influence of technology use on L2 selves, and analyzes how this technology-empowered digital visualization of L2 selves contributes to learning engagement and second language acquisition. Despit...
摘要:
English Medium Instruction (EMI) is expanding rapidly across the globe due to neoliberal ideologies and policies, as well as the internationalization of higher education on a global scale (De Costa...
摘要:
以Web of Science核心合集数据库及Semantic Scholar数据库为数据源,运用CiteSpace可视化分析工具,从研究历时性、国家和机构合作、关键词三个方面对国外认知诊断在英语测评中的应用研究进行综合分析。分析发现,国外认知诊断研究在理论与实证方面蓬勃发展,侧重于英语阅读能力诊断研究;因听力过程的复杂性和特殊性,听力能力诊断研究尚处起步阶段。未来认知诊断研究需从加强听力能力诊断、开发诊断性测试、甄选诊断模型、开展课堂评估方面深入挖掘。另外,基于认知诊断的计算机化自适应诊断也正在发展,对进一步学习和研究认知诊断具有重要意义。