摘要：WS2 has been considered as a promising anode material due to its high lithium storage capacity as well as fascinating physical properties. However, the insufficient electrical and ionic conductivities deteriorate the rate per- formance of the batteries. Herein, we report a simple synthetic approach towards graphene-WS2 hybrids by rolling graphene into a hollow nanotube in which WSz nanoplates are en- capsulated. This new electrode design strategy facilitates the fabrication of integrated and binder-free lithium ion battery and sodium ion battery electrodes by combining electrospin- ning and chemical vapor deposition （CVD） methods. Bene- fiting from their confined growth and the interconnected in- situ graphitic carbon coating nanocable web, the WS2@G with nano-level WS2 dispersion not only provides an efficiently conductive and electrolyte accessible framework, but effec- tively alleviates the volume change during the cycling, en- abling a mechanically robust binder-free electrode along with the outstanding electrochemical Li＋ and Na＋ storage proper- ties.

摘要：提出单纯台阶式溢洪道的水力设计方法。对比分析了台阶式溢洪道的水流流态、自掺气发生点以及消能效果,推荐Yasuda公式作为滑行水流和跌落水流界限的判别式,提出了自掺气发生点和消能率的统一计算公式,给出了台阶段水面线的计算方法。所得成果可以作为单纯台阶式溢洪道的工程设计参考。

摘要：通过对U形渠道直壁式量水槽的标准化研究,提出了U形渠道直壁式量水槽的设计标准、制造标准和安装标准,并在水尺上设计了流量读数,提高了用水的透明度。

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