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Frequency related localisation of harmonic elastic waves in stratified welds
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作者 D.J.Colquitt A.B.Movchan +1 位作者 I.S.Jones W.Daniels 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2010年第4期567-572,共6页
The paper presents a computational model for elastic waves in a structured weld adjacent to the free surface of an elastic solid. The main emphasis is on the interaction of waves with the micro-structure of the weld. ... The paper presents a computational model for elastic waves in a structured weld adjacent to the free surface of an elastic solid. The main emphasis is on the interaction of waves with the micro-structure of the weld. Effects of localisation and channeling of waves are addressed. A model of a grain structure within the weld is also considered. 展开更多
关键词 macro-structured welds Waves in stratified media Dispersion Localisation
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Theory of Textual Patterns and Discourse Coherence in Students' English Writing
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作者 QI Xiu-kun ZHAO Yong 《Sino-US English Teaching》 2012年第6期1204-1207,共4页
The present study applies "Textual Patterns" like "general-specific" and "claim-counterclaim" to explore discourse coherence in Chinese students' English writing. The study confirms the function of the textual ... The present study applies "Textual Patterns" like "general-specific" and "claim-counterclaim" to explore discourse coherence in Chinese students' English writing. The study confirms the function of the textual patterns as macro-structures for discourse interpretation and production, and proves textual patterns as effective tools in identifying and solving problems with discourse coherence in Chinese EFL (English as a Foreign Language) learners' writing. 展开更多
关键词 discourse coherence textual patterns macro-structures word organizers
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