Electro-mechanically controlled assembly of reconfigurable 3D mesostructures and electronic devices based on dielectric elastomer platforms     

Wenbo Pang  Xu Cheng  Haojie Zhao  Xiaogang Guo  Ziyao Ji  Guorui Li  Yiming Liang  Zhaoguo Xue  Honglie Song  Fan Zhang  Zheng Xu  Lei Sang  Wen Huang  Tiefeng Li  Yihui Zhang 《国家科学评论(英文版)》2020,7(2):342

The manufacture of 3D mesostructures is receiving rapidly increasing attention, because of the fundamental significance and practical applications across wide-ranging areas. The recently developed approach of buckling-guided assembly allows deterministic formation of complex 3D mesostructures in a broad set of functional materials, with feature sizes spanning nanoscale to centimeter-scale. Previous studies mostly exploited mechanically controlled assembly platforms using elastomer substrates, which limits the capabilities to achieve on-demand local assembly, and to reshape assembled mesostructures into distinct 3D configurations. This work introduces a set of design concepts and assembly strategies to utilize dielectric elastomer actuators as powerful platforms for the electro-mechanically controlled 3D assembly. Capabilities of sequential, local loading with desired strain distributions allow access to precisely tailored 3D mesostructures that can be reshaped into distinct geometries, as demonstrated by experimental and theoretical studies of ∼30 examples. A reconfigurable inductive–capacitive radio-frequency circuit consisting of morphable 3D capacitors serves as an application example.  相似文献   

河南咨议局始末     

杨涛 《晋城职业技术学院学报》2015,(4):91-93

清末新政之际,各省咨议局应运而生。河南咨议局在抚署官员的筹办和各地绅民的配合下,也走上了历史的舞台。在1909年到1911年短短两年中,经过前期的设立筹办处,选举咨议局议员,到正式开会,讨论各方议案。中间又发起了大规模的国会请愿运动,最后随着清朝的灭亡而消散。作为近代河南的民主尝试,这一小步的作用不能小看。  相似文献   

提高汇编语言课程教学效果的方法与途径     

郭咏梅  张剑妹  马桂芳  刘丽丽 《长治学院学报》2011,28(5):100-102

针对汇编语言课程的特点和教学中存在的问题,结合多年实际教学体会和经验,探讨了提高本课程教学效果的方法和途径,按知识点整合教学内容、调整教学顺序,形成本课程的知识结构。这些方法有效地激发了学生的学习兴趣,在教学实践中取得了明显的效果。  相似文献   

Diatom-inspired multiscale mineralization of patterned protein–polysaccharide complex structures     

Ke Li  Yingfeng Li  Xinyu Wang  Mengkui Cui  Bolin An  Jiahua Pu  Jintao Liu  Boyang Zhang  Guijun Ma  Chao Zhong 《国家科学评论(英文版)》2021,8(8)

Marine diatoms construct their hierarchically ordered, three-dimensional (3D) external structures called frustules through precise biomineralization processes. Recapitulating the remarkable architectures and functions of diatom frustules in artificial materials is a major challenge that has important technological implications for hierarchically ordered composites. Here, we report the construction of highly ordered, mineralized composites based on fabrication of complex self-supporting porous structures—made of genetically engineered amyloid fusion proteins and the natural polysaccharide chitin—and performing in situ multiscale protein-mediated mineralization with diverse inorganic materials, including SiO₂, TiO₂ and Ga₂O₃. Subsequently, using sugar cubes as templates, we demonstrate that 3D fabricated porous structures can become colonized by engineered bacteria and can be functionalized with highly photoreactive minerals, thereby enabling co-localization of the photocatalytic units with a bacteria-based hydrogenase reaction for a successful semi-solid artificial photosynthesis system for hydrogen evolution. Our study thus highlights the power of coupling genetically engineered proteins and polysaccharides with biofabrication techniques to generate hierarchically organized mineralized porous structures inspired by nature.  相似文献   

Carbon of Magical Structures     

ZHI Linjie 《中国科学院院刊(英文版)》2014,(2):157-160

<正>As one of the Partner Groups which were initiated to promote scientifi c exchanges and collaborations between the Max Planck Society(MPS)and the Chinese Academy of Sciences(CAS),the Partner Group led by Prof.Dr.ZHI Linjie was established on May,2010.During the past three years,the group received substantial support from the CAS and the Max-Planck-Institute for Polymer Research(MPIP)for extensive exchanges and collaborations on carbon-rich nanomaterials.Productive collaborations between the researchers and the students from the National Center for Nanoscience and Technology(NCNST)and the MPIP as well as the collaborations between the Partner  相似文献   

在CROMEMCO微型计算机上开发Z-80单板机     

龚学贤 《上海海事大学学报》1991,(1)

Z-80单板计算机在国内具有大量的用户,但怎样方便地开发Z-80单板计算机,使其强大的功能得以充分发挥是一个很重要的问题。本文叙述了利用微型计算机开发单板机的一般方法,并介绍了一个在CROMFMCO微机上开发TP801单板机的实例。  相似文献   

外部供应商对装配系统中提前付款融资的影响     

王文利  骆建文  张钦红 《软科学》2012,26(11):125-129

研究了有外部供应商与无外部供应商时装配商对供应商的最优融资决策和供应商的最优生产决策,并比较了两种情况下的融资效率。结果表明:不存在外部供应商时,装配商向供应商的融资受装配系统内每个供应商成本及自有资金的影响,而存在外部供应商时,装配商向各个供应商的融资决策是独立的;与无外部供应商时对比,存在外部供应商时资金约束的供应商需要拥有更多的自有资金量,才能达到无资金约束下的最优产量,并且竞争程度越高,所需的自有资金量越多。最后通过数值分析验证了结论。  相似文献   

高职汽车制造与装配技术专业建设模式探索     

李莎 《科教文汇》2012,(30):170-171

以适应汽车工业发展需求,服务区域经济为根本,以培养高技能人才为目的．分析国内汽车制造市场人才需求,探讨高职院校汽车制造与装配技术专业建设的新模式。  相似文献   

国防科技重大工程多层次隐性知识传递模型——基于技术总成视角     

孔德成  侯光明 《科学学研究》2012,30(8):1246-1252

为实现国防科技重大工程技术总成过程中多层次隐性知识的有效传递,本文融合系统动力学理论和知识管理理论,对基于技术总成的多层次隐性知识传递特点和过程进行分析,在此基础上,构建基于技术总成的多层次隐性知识传递模型。通过对模型平衡点的求解和稳定性分析得出多层次隐性知识有效传递的基本参数控制条件为:δ1,δ2>1,且传递效果与δ1,δ2正相关。最后,基于管理学视角,提出通过构建支撑知识交互的信息技术平台,建立高效的组合式激励机制和营造鼓励知识交流和创新的工程文化促进基于技术总成的国防科技重大工程多层次隐性知识的高效传递。  相似文献   

天然肠衣搭配组装算法     

殷建峰  李增栋  陈庆 《南通职业大学学报》2013,(2):65-68,75

天然肠衣原料长短不一,按要求搭配组装成品,运算量很大。采用迭代算法并基于平均值变动规律的研究,建立起用于肠衣成品搭配组装的4个算法模型,其特点是：先行剔除剩余原料,随机应变安排次序,均匀调节长短搭配,即时检验约束条件,可同时保障可行性与最优性,得到了最好的结果,且优于整数规划模型。  相似文献