Regulating surface wrinkles using light     

Liangwei Zhou  Kaiming Hu  Wenming Zhang  Guang Meng  Jie Yin  Xuesong Jiang 《国家科学评论(英文版)》2020,7(7):1247

Regulating existing micro and nano wrinkle structures into desired configurations is urgently necessary yet remains challenging, especially modulating wrinkle direction and location on demand. In this work, we propose a novel light-controlled strategy for surface wrinkles, which can dynamically and precisely regulate all basic characteristics of wrinkles, including wavelength, amplitude, direction and location (λ, A, θ and L_c), and arbitrarily tune wrinkle topographies in two dimensions (2D). By considering the bidirectional Poisson''s effect and soft boundary conditions, a modified theoretical model depicting the relation between stress distributions and the basic characteristics was developed to reveal the mechanical mechanism of the regulation strategy. Furthermore, the resulting 2D ordered wrinkles can be used as a dynamic optical grating and a smart template to reversibly regulate the morphology of various functional materials. This study will pave the way for wrinkle regulation and guide fabrication technology for functional wrinkled surfaces.  相似文献   

立体构成艺术在服饰图案设计中的应用研究   总被引：1，自引：0，他引：1  

杨明  孙静 《南宁职业技术学院学报》2012,(6):23-27

随着国内服装业的快速发展,服饰图案设计显得愈发重要,而国内服装行业的批量化生产和单一的设计,直接制约了服饰图案设计的发展。从立体构成艺术与服饰图案设计的契合点出发,探究通过各种自然材料和人工材料的综合运用去开发具有三维空间的服饰图案的可能性,这些材质变化会给人带来服饰图案视觉上的新感受,满足消费者追求品味、时尚与服饰个性的需求。  相似文献   

To the ends of the earth: Acquisitions work in the Library of Congress overseas offices     

Pamela Howard-Reguindin 《Library Collections, Acquisitions, and Technical Services》2005,28(4):410-419

The Library of Congress maintains six overseas offices for acquisitions and preservation purposes. The offices are located in Brazil, Egypt, India, Indonesia, Kenya, and Pakistan and collectively acquire, catalog, microfilm and deliver hundreds of thousands of documents per year to the Library of Congress and over one hundred Cooperative Acquisitions Program participants. The article focuses on the acquisitions, cataloging, automation, and preservation roles of the offices, in addition to the Cooperative Acquisitions Program. A brief profile of each office is given at the end of the article.  相似文献   

我国期刊联合目录建设模式研究     

卞丽  王玲 《图书馆建设》2007,(3):49-51,54

依据期刊联合目录建设主体，现阶段我国图书馆期刊联合目录建设可划分为自由联合体模式、图书馆联盟发起模式、图书馆与数据商合作模式、国家文献中心模式、书目供应体模式和分布式模式等。本文分别以CSDL全国期刊联合目录、CALIS联合目录、CCC、NTSL和CASHL期刊目次库、cnpLINKer及汇文虚拟联合目录等为各种模式代表，并对各种模式联合目录文献收录情况、功能特点等进行了分析和评价。  相似文献   

对“入世”后高职人才教育观念及培养模式的思考     

张宁  王莉娟 《贵阳金筑大学学报》2002,(4)

入世对中国的影响是多方面的,从长远来看,对我国教育,特别是高职高专教育影响更是巨大而深刻。从表现上看,WTO运行强调的是以市场经济为基础,以公平竞争、自由贸易为基本原則,各成员必须遵守以世界贸易组织为核心的国际多边贸易体制中的各种规則,但它所內含的要求則是高职高专在人才教育观念和培养模式上的转变,所培养的人才应当能够适应WTO新游戏规則,并具备新的意识和新的能力。  相似文献   

运动生理学WEB CAI课件的开发与应用   总被引：2，自引：2，他引：0  

封飞虎  张雁立  欧阳燕 《武汉体育学院学报》2004,38(4):120-122

阐述了《运动生理学》WEBCAI课件的主要设计思想、开发过程、开发环境和课件的WEB页实现过程．介绍了课件主要模块的功能。初步探讨了课件在教学过程中的应用,认为运动生理学WEBCAI课件在教学中具有激发学生学习兴趣、利于对知识的理解和掌握、优化课堂结构和扩大课堂教学信息量等作用。  相似文献   

体育学院学生学习自我监控能力培养途径与模式   总被引：2，自引：0，他引：2  

斯力格  孙永生 《沈阳体育学院学报》2003,(2):56-59

将董奇、周勇提出的“学生学习的自我监控理论”推广、运用到体育教育专业学生学习自我监控能力的实践 ,研究结果表明 ,该理论对体育教育专业学生学习自我监控能力培养也是行之有效的 ;培养的基本途径是从“他控到自控”的过程 ,即在提高教师教学监控能力的基础上 ,选择合作教学和交互教学模式相结合的方式对体育教育专业学生学习自我监控能力进行培养的效果更好。  相似文献   

文化负迁移现象初探     

齐一莲 《辽宁师范大学学报(社会科学版)》2007,30(4):22-23

文化负迁移的产生与两种语言的文化内涵差异、不同思维方式、价值观和世界观等因素有关。在学习外语过程中,我们应该重视目标语背后的文化知识,使英语真正成为跨文化交流的工具。  相似文献   

读书会的发展与阅读推广组织方式     

段梅  曹炳霞  韩叶 《图书情报工作》2015,59(20):29-33

[目的/意义]当前高校图书馆阅读推广日益重要,针对读书会这一有效的蓷推广方式,分析其利弊,有助于完善读者书会的组织方式,引导读书会更好地发展。[方法/过程]查阅文献资料,搜集整理优秀的读书会案例,调查了解其组织方式,总结国内外读书会的发展史、分类、组织方式及特色,分析并探讨目前我国国内读书会普遍存在的不足之外。[结果/结论]读书会由于小众、自由,同其他阅读推广方式相比,缺乏影响力,未来发展应注重联合多方资源与力量,强化内部管理,并借助多媒体平台,推动读书会更好发展。  相似文献   

Tracking of physical activity in pubertal boys with different BMI over two-year period     

Triin Rääsk  Kenn Konstabel  Jarek Mäestu  Evelin Lätt  Toivo Jürimäe  Jaak Jürimäe 《Journal of sports sciences》2015,33(16):1649-1657

We examined the tracking of physical activity (PA) measured by accelerometers and subjective self- and parental reports in normal weight and overweight and obese pubertal boys over two-year period. In total, 156 boys with mean (±SD) age of 11.53 ± 0.76 at baseline and with mean age of 13.94 ± 0.74 at 2 year follow-up were studied. At baseline and approximately two years later, the boys completed self-report questionnaire and wore an accelerometer for seven consecutive days. On the basis of first year assessment’s body mass index (BMI), the children were grouped as normal weight and overweight and obese groups according to BMI cut-offs. Tracking correlations of objectively measured PA and subjectively measured PA were fairly similar across the 12–14 year-old-boys weight groups over two year period. Tracking correlations of objectively measured PA and subjectively measured PA were not significantly different over two-year period between both BMI groups. The results of the study show that pubertal boys objectively measured PA decreased over two-year period and so the boys started to be less active in their pubertal period.  相似文献