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花荔 《江西科技师范学院学报》2006,(6):91-93,86
服饰是观念的物化,是人类文明与进步的象征,是文化艺术不可分割的组成部分,具有民族特色、风格和个性。中国民族服饰在不同历史时期有着不同的特点。具体表现在它的地域性、装饰性、多样性的特点。而在传统中国民族服饰的影响下,中国的唐装与旗袍最具影响力。同时,在中国民族服饰被受瞩目时,各国的T型舞台上和都市街巷中都掀起了闪亮的民族之风。 相似文献
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A discussion is given of recent advances in phase-field modeling of materials which change phase. On one hand, general models incorporating elasticity properties of the material, nonconserved and conserved order parameters, and nonlocal effects are now available. On the other hand, gradient theories for binary alloys have been developed which reflect such effects as the dependence of capillarity on the concentration of impurities, solute trapping in its dependence on velocity of solidification fronts, and other nonequilibrium phenomena. 相似文献
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Jiu-Jiu Chen;Qiu-Shuang Yang;Shao-Yong Huo;Chun-Ming Fu; 《physica status solidi b》2024,261(10):2400200
Topological rainbow trapping, which can separate and trap different frequencies of topological states into different positions, plays a key role in topological acoustic devices. However, few schemes have been proposed to realize multidimensional topological rainbow trapping effects with the hierarchy of edge and corner, which has partly restricted their practical applications in multifunctional integrated acoustic devices. Herein, a tactic to realize a multidimensional topological rainbow trapping of acoustic wave with the hierarchy of edge and corner in the second-order topological sonic crystals is proposed. Based on the designing of a self-ordering structure to both induce the topological phases of the bulk and edge states in the rectangular lattice, the edge states and corner states are obtained. Furthermore, the regularity between the located frequency of topological edge and corner states and the geometric parameters are discussed in detail. Finally, the rainbow trapping effects for topological edge states and corner states are investigated, respectively, in which different frequencies of topological acoustic edge and corner states are well separated and trapped in different positions without overlap. This proposal may provide a novel way for multidimensional wave manipulation and the integration of multifunctional acoustic devices. 相似文献
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