Canon is one of the most recognizable brands in the photo world, and these are its top cameras based on rigorous testing and thousands of photos. Images, and the devices that capture them, are my ...

四环起航真空冷冻干燥机LGJ-10D标准型采用PLC控制系统，具备彩色触摸屏、远程控制和高效节能等特性，能实时记录并存储物料和设备数据。该设备使用进口封闭式压缩机制冷，冷阱温度可达-60℃，捕水量为3Kg，真空度小于等于5Pa，并具备冷阱自动化霜功能。

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

Find out why winter's a great time to shoot silhouettes and pick up a few silhouette photography tips in our latest 'how-to' guide. Samsung marks its 11th year supporting ePHOTOzine's Photo of the ...