摘要：gn Store Nord公司是世界驰名的无线耳机制造商。随着生产不断扩大，该公司需要设计新的系统管理解决方案。

摘要：Pt heterostructures can have distinctly different physical and chemical properties to their single-phase components. Herein,a smart approach was developed for the large-scale production of graphitic C3N4–Pt(gC 3N4–Pt) heterostructures on three-dimensional(3D) graphene sheet networks for highly efficient methanol oxidation. Because the gC 3N4–Pt heterostructures on the conductive 3D graphene network support provide the methanol molecules good accessibility to the active sites,the obtained catalyst exhibits excellent electrocatalytic performance,including high catalytic activity,unusual CO tolerance,and good stability,and is superior to commercial Pt/C and Pt/graphene catalysts for methanol oxidation.

摘要：本文对gn140型积分球仪的设计原理和结构作了介绍,给出了一些样品的实验数据,并对测量误差进行了分析。

摘要：本文用复数矢量解析法对gn721挠性剑杆织机的六连杆打纬机构进行精确的运动分析,作出了筘座脚的运动线图。并与1511M型织机的四连杆打纬机构相比较,六连杆打纬机构可以允许引纬器有较多的时间通过梭口。因此,在老机改造和新机设计时都可采用六连杆打纬机构。