This article focuses on the development of red tourism and construction education bases, designs a tour guide robot that combines with Internet Things for guiding promoting bases. The motion control part this design is completed by STM32, system adopts ROS (Robot Operating System) framework, achieving functions such as map construction, path planning, navigation, obstacle avoidance, voice guida...

Abstract To meet the requirements of 5G communication system, Doherty power amplifier has become a research hotspot because its peak-to-average ratio and high backoff efficiency. At same time, with continuous development mobile technology, traditional gradually been difficult to needs due structural problems. On one hand, limitation 1/4 wavelength transmission line in amplifier, it is achieve b...