Peatlands store approximately 20-30%of all soil carbon(C)in terrestrial ecosystems,and thus soil C accumulation in or lo......

Being a major component of coastal zooplankton assemblages, hydromedusae play a key role in material recycling and energ......

针对压电谐振器振动特性分析的应用需求, 构建了一种小型化、廉价的矢量分析系统。系统采用STM32控制4路DDS芯片产生驱动信号和矢......

　　Being a major component of coastal zooplankton assemblages,hydromedusae play a key role in material recycling and en......

提出了数控机床圆弧插补运动误差的矢量分析方法，可用双球规测量装置测得数控机床圆弧插补运动的误差。在分析运动误差与误差矢量关......