Abstract: Disclosed in embodiments of the utility model is a tractor power supply system, used for supplying power to a power system of a tractor. The tractor power supply system is provided above or below a transport trailer connected to the tractor. The tractor power supply system is provided above or below the transport trailer, and the tractor power supply system can be configured with battery modules of different capacities according to use conditions of the tractor by utilizing the characteristic of a large installation space of the transport trailer, thereby ensuring the endurance mileage and the working time of the tractor.

Abstract: The present invention relates to computer science, molecular biology and microfluidics technique which provides a DNA molecular computer based on microfluidic chip. The objective is to provide a DNA molecular computer which uses the microfluidic chip as a operation platform, mainly including: using DNA molecules as operation media, using the microfluidic chip as the operation platform of a DNA molecular operator; using DNA molecules as storage media, using the microfluidic chip as the operation platform of a DNA molecular storage; using a electronic computer and a detector as the kernel of a controller; said microfluidic chip includes a DNA molecular computation region and a DNA molecular storage region. The microfluidic chip consists of digestion, ligation, PCR amplification and chip electrophoresis unit connected by microchannels in turn, and carries out the liquid control through micropumps and microvalves.