摘要：Silicon(Si)is a promising anode material for next-generation Li-ion *** nanometer-sized Si could alleviate the pulverization caused by large volume changes during deep ***,compression between agglomerated Si particles causes Si cracking and electrode *** this,we engineered a mechanical cushioning space between Si particles via elastic hollow graphene shells(GSs)to flexibly buffer volume changes and maintain the stability of the electrode *** stress generated from the Si volume expansion during lithiation was mechanically buffered and gently released by compression of the hollow space of the *** this Si/GS composite electrode,GS also reduced the local agglomeration of Si particles and effectively improved the overall *** these advantages,the designed Si/GS electrode showed an enhanced cycling performance with more than 1200 mA h g^(-1) at 0.8 A g^(-1) and an excellent rate capability of 1025 mA h g^(-1) at 4 A g^(-1) after 200 cycles.

摘要：在对研发的仿生鱼尾推进船模中模拟鱼尾摆动的无急回运动曲柄摇杆机构进行理论分析的基础上,提出了在机械CAD环境下,辅助以MATLAB优化计算,进行无急回曲柄摇杆机构的设计过程,分析了该种方法的设计精度。研究结果表明在机械CAD环境下高精度的图解法辅助以Matlab等计算软件的优化计算将不仅满足机械设计领域里的快速精确的做图需要,而且也能为机械设计提供准确可靠的参数解。

摘要：近年来,“智能家居”由概念变成现实,而现存的智能家居系统并不适合老年人、残疾人等无法熟练使用智能设备人群。基于此,设计了智能照明系统,以脑波作为指令,实现用“意念”控制灯光。智能照明系统不仅突破了普通照明系统使用人群的局限性,也为脑波信号应用于智能家居系统提供了有益参考。