Abstract: The present disclosure discloses a method and a device for continuously synthesizing cyclopropane compounds. The method includes the following steps: continuously performing a synthetic reaction of a diazomethane precursor in a first reactor, the reaction product of the first reactor flowing into a separator for stratification, the organic phase obtained by stratification overflowing into a second reactor, continuously consuming the diazomethane precursor in a second reactor to prepare diazomethane and performing an electron-rich monoolefin cyclopropanation reaction in situ so as to obtain the cyclopropane compound.

Abstract: Disclosed is a testing device and method for a service life of an air-conditioning compressor of a new energy vehicle running with pure gas. The testing device includes an alternative refrigeration system, a measurement and control system, and a testing environment room. A main refrigeration cycle system of the alternative refrigeration system runs with pure gas, gas of a testing compressor is discharged via a discharge throttle valve, and then enters a suction end via a suction throttle valve and an electronic expansion valve, and since there is no phase change, a heat exchange amount is small; adjustable ranges of the discharge throttle valve, the suction throttle valve and the electronic expansion valve are wide; and based on the system structure, a small refrigeration system can be used to test a compressor having high cooling capacity, and the system can quickly achieve a target working condition with a small amount of refrigerant.

Abstract: The present application relates to the field of lifting equipment, in particular to a crane and a control method thereof.

Abstract: Techniques for proactively detecting configuration inconsistencies may include: receiving notification regarding an occurrence of a trigger event in a system, wherein the trigger event is one of a plurality of defined trigger events, and wherein the plurality of defined trigger events include one or more defined time periods; and responsive to receiving the notification, performing first processing including: capturing configuration information describing a current configuration of the system; and performing proactive consistency validation processing of the configuration information that detects inconsistencies between dependent entities of the current configuration. The proactive consistency validation processing may detect inconsistencies between dependent entities of the same type or different types. Metadata may identify dependencies between entities that may exist in a configuration. Responsive to detecting an inconsistency, a suitable action may be taken and/or user notified.

Abstract: A light gauge steel joist basic structure system of a light partition wall is disclosed, comprising: top and ground joists and vertical joists. The top and ground joists comprise a ground joist and a top joist. The vertical joist is provided between the top and ground joists by means of a first connection member. The vertical joist and the vertical joist are fixedly connected to each other by means of the first connection member and/or a second connection member. V-shaped slots are symmetrically provided on two side walls of the top and ground joists. The V-shaped slots are provided on the side walls and the bottoms of the vertical joists. A construction method for a light gauge steel joist basic structure of a light partition wall is also disclosed. The light gauge steel joist basic structure system is simple and fast to be constructed and has desirable flatness.