Abstract: The present disclosure relates to a method and an apparatus for processing a data flow of a positioning base station, a device and a computer readable medium. The method includes: extracting, under the condition that a data packet to be processed which is sent by the positioning base station is received, a first identifier carried in the data packet to be processed; screening out a first data packet by using the first identifier, where the first data packet is a data packet to be processed including a distance from the positioning base station to a target position; extracting a second identifier carried in the first data packet, where second identifiers carried in different data packets to be processed sent by the same positioning base station vary; and determining, under the condition that time indicated by the second identifier is target time, the first data packet as a target data packets.

Abstract: The present invention relates to cefazolin sodium pentahydrate crystal and a method for assembly and preparation of the crystal molecule. The cefazolin sodium pentahydrate crystal molecule contains five water molecules, orthorhombic system, space group of C222(1), in which sodium ion is bonded to the cefazolin molecule with a coordinate bond. The method for assembly and preparation of cefazolin sodium pentahydrate crystal molecule are: adding a solvent to a reactor equipped with a jacket, adding cefazolin acid and a sodium salt, heating until the reaction solution is clear, stirring continuously, adjusting pH, upon the completion of the reaction, transferring the liquid into a jacketed crystallizer, adding crystal seeds or nucleating spontaneously, controlling cooling, slowly adding a antisolvent.

Abstract: The present invention relates to cefazolin sodium pentahydrate crystal and a method for assembly and preparation of the crystal molecule. The cefazolin sodium pentahydrate crystal molecule contains five water molecules, orthorhombic system, space group of C222(1), in which sodium ion is bonded to the cefazolin molecule with a coordinate bond. The method for assembly and preparation of cefazolin sodium pentahydrate crystal molecule are: adding a solvent to a reactor equipped with a jacket, adding cefazolin acid and a sodium salt, heating until the reaction solution is clear, stirring continuously, adjusting pH, upon the completion of the reaction, transferring the liquid into a jacketed crystallizer, adding crystal seeds or nucleating spontaneously, controlling cooling, slowly adding a antisolvent.