排序方式： 共有57条查询结果，搜索用时 15 毫秒
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热色性材料变色机理及应用 总被引：3，自引：0，他引：3
本文介绍了各类热色性材料的变色机理 ,重点探讨了国内外在可逆热色性材料领域的研究动态、应用及发展趋势 相似文献
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本研究依据可逆性思维过程理论(R:APOK模型),针对轻度智力落后儿童编制了实用思维训练教程,并对特殊学校和随班就读的轻度智力落后儿童进行了为期半年(一个学期)的教学实验。结果表明,接受过可逆性思维训练的实验组的智力发展比没有接受过此训练的对照组有更显著的进步。虽然可逆性思维训练还不能将轻度智力落后儿童训练成为智力正常的普通儿童,但它确实能够在一定程度上有效地促进他们认知、智力(思维)发展。因此,教育者不能忽视轻度智力落后儿童认知的最近发展区,而应该通过各种有效的思维训练途径进一步促进他们认知发展。 相似文献
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Yumary Ruiz Shaina Riciputi Vincent Guilamo-Ramos Stewart C. Alexander 《American journal of sexuality education》2019,14(2):165-185
While long-acting reversible contraception (LARC) reduces risk of repeat-births, use remains low among rural Latinx adolescent mothers. This qualitative study identified perspectives about factors that influence LARC use among this population. Participants were dyads of parenting Latinx adolescent daughters and their mothers (n?=?9 dyads) and nurses (n?=?17). Findings revealed themes specific to this vulnerable population including (a) distinct ways LARC characteristics fit into parenting teenagers’ lives, (b) supportive health care climate toward LARCs, and (c) factors that inhibit LARC uptake. The study has implications for sexuality education that seeks to reduce repeat-births among this population. 相似文献
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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 Lc), 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
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刘艳 《涪陵师范学院学报》2005,21(5):100-101
分析了化学平衡中若干容易造成理解错误的问题，对大学无机化学的教学和中学教学中对该类问题的理解有很大帮助。 相似文献
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为了对系统更方便地进行极点配置、解耦控制、设计状态观测器,通过按行搜索的方法,对线性时不变系统进行了可控性分解,并利用可逆线性变换、线性相关性等知识证明可控性分解定理。通过实例说明了该方法的可行性。 相似文献
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张保营 《伊犁教育学院学报》2003,16(3):82-83,97
学生在学习《化学反应速率和化学平衡》过程中,往往对化学平衡这一概念理解不透,尤其 是判断一个可逆反应是否达到平衡,由于考虑不全面而导致判断失误。结合实例,总结化 学平衡的标志及同一平衡问题。 相似文献
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张君才 《咸阳师范学院学报》2002,17(6):61-63
叙述了不同热力学过程中熵变的计算方法，并将克劳修斯不等式应用于各种热力学过程，定性和定量讨论了熵判据的具体应用，解决了利用熵变判断过程的可逆性和自发性问题。 相似文献
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