In this paper, a quasi-spherical PVDF airborne ultrasonic transducer for three-dimensional (3D) ultrasonic location systems is designed and fabricated using two strips of cylindrical PVDF film. The 3D ...

The excitation and front-end electronics for an ultrasonic transducer array used in an air-coupled NDT system is presented. The main characteristic of the whole system is its wide dynamic range, ...

Discover NeoBlade, the compact ultrasonic cutter for effortless slicing through various materials, ... The NeoBlade's business end vibrates at 40 kHz for smooth cutting, slicing and carving.

The scalable synthesis and transfer of large-area graphene underpins the development of nanoscale photonic devices ideal for new applications in a variety of fields, ranging from biotechnology, to ...

这篇综述系统阐述了绿色可持续金属有机框架（MOFs）在废水处理中的光催化应用，重点探讨了以生物基配体、环保金属（如Fe、Al）和绿色溶剂（水、离子液体、超临界CO2 ）为核心的合成策略，揭示了MILs、UiOs和ZIFs等稳定结构对有机污染物（如染料、抗生素）的高效降解机制，为环境修复提供了兼具 ...

本方案采用的是两电平通用IGBT,开关频率设定为15 KHz,控制器驱动电机至额定转速100 000 r/min 时电流波形如图4所示,可以看到此时电机电流有效值约为63 A,频率为1 600 Hz,电流正弦度很好,大约为8%,电流基本保持平稳。

Rio Tinto’s mammoth Tomago aluminium smelter is reportedly close to collapse, putting some 6000 jobs at risk. The facility, situated in Tomago about 13km west of Newcastle, employs some 1000 ...

The hybrid operation, involving 20 kHz ultrasound and heating at 80 °C, achieves the highest extraction efficiency at 92%. A recovery rate of 84% for ultrasonic extraction at 20 kHz and power ...