Abstract: Provided is a method for preparing isoquinolinone compounds. The preparation method has the advantages of a reasonable route, convenient and easy operations, high preparation yield, high purity, and suitability for industrial production.

Abstract: The present invention discloses a method for coreless spinning of a large-ratio multi-variable-diameter hollow shaft, belonging to the field of spinning. The present invention includes following steps: S1: clamping a blank in a lower die unit, driving the workpiece to rotate, causing a rough spinning wheel and a fine spinning wheel to be in contact with the workpiece for staggered spinning, and performing curved reciprocating feed spinning via point contact to form a roughly-spun blank; S2: shifting the rough spinning wheel and the fine spinning wheel, causing shaping spinning wheels to be in contact with the workpiece for shaping spinning, and subjecting the shaping spinning wheels to linear contact shaping and fine spinning only in a radial direction, to obtain a finely spun blank. The present invention solves the problems of high machining difficulty and poor molding quality of hollow shafts in the prior art.

Abstract: The present invention discloses a method for coreless spinning of a large-ratio multi-variable-diameter hollow shaft, belonging to the field of spinning. The present invention includes following steps: S1: clamping a blank in a lower die unit, driving the workpiece to rotate, causing a rough spinning wheel and a fine spinning wheel to be in contact with the workpiece for staggered spinning, and performing curved reciprocating feed spinning via point contact to form a roughly-spun blank; S2: shifting the rough spinning wheel and the fine spinning wheel, causing shaping spinning wheels to be in contact with the workpiece for shaping spinning, and subjecting the shaping spinning wheels to linear contact shaping and fine spinning only in a radial direction, to obtain a finely spun blank. The present invention solves the problems of high machining difficulty and poor molding quality of hollow shafts in the prior art.

Abstract: A dual system-based communication method comprises: in a terminal having dual operating systems, binding information of each contact to a corresponding operating system; and in the situation that the dual operating systems operate simultaneously, when a communication is received, conducting communication in an operating system corresponding to a contact initiating the communication request. According to the present disclosure, basis data is isolated between two operating systems on the basis of contacts, information of each contact is bound to a corresponding operating system, and when a communication request is received, communication is conducted in an operating system corresponding to a contact initiating the communication request, so that an incoming call from a contact of a secure system is preferentially switched to a secure operating system for communication and it is ensured that relevant information is isolated and stored in the secure system.