Abstract: The present disclosure provides a pilot proportional control valve apparatus, an automatic calibration method, engineering machinery and a storage medium, and relates to the technical field of engineering machinery, wherein the pilot proportional control valve apparatus including a hydraulic system and a controller; the hydraulic system including: a plurality of proportional pressure reducing valves, a calibration reversing valve, and a pressure sensor; the calibration reversing valve including a plurality of reversing units, an output end of each proportional pressure reducing valve being respectively connected with an input end of one corresponding reversing unit; the pressure sensor being arranged in a detection oil path; the controller performing calibration processing on the proportional pressure reducing valve according to a pilot oil detection pressure and an output pressure value of the proportional pressure reducing valve.

Abstract: Disclosed is a quick-release night-vision device interface, which relates to the field of night-vision devices, and which includes a night-vision device body and a connection device to which a sight is mounted. The connection device is snap-fitted on a connection ring of the night-vision device body, and the connection ring is provided with a fixing mechanism for fixing the connection device. A snap boss is fixedly mounted on an outer side of the connection ring, and an inner side wall of the connection device is provided with a snap groove snap-fitted with the snap boss of the connection ring. An inner side of the connection ring is provided with a snap groove, and an outer side wall of the sight is provided with a snap boss snap-fitted with the snap groove on the inner side of the connection ring.

Abstract: Embodiments of the present disclosure provide a method in a network element for access controlling. The method comprises receiving an access request message from a terminal device and checking a data structure for maintaining state information of terminal devices from which the network element has received access request messages, in response to the reception of the access request message. The method also comprises determining whether the requesting terminal device is abnormal based on said checking of the data structure and rejecting the access request of the requesting terminal device in response to determining that the requesting terminal device is abnormal.

Abstract: Embodiments of the present disclosure provide a method in a network element for access controlling. The method comprises receiving an access request message from a terminal device and checking a data structure for maintaining state information of terminal devices from which the network element has received access request messages, in response to the reception of the access request message. The method also comprises determining whether the requesting terminal device is abnormal based on said checking of the data structure and rejecting the access request of the requesting terminal device in response to determining that the requesting terminal device is abnormal.

Abstract: A new ionic compound is provided that is derived from N,N-dimethylaniline and pentafluorophenol in amounts such that there are at least 2 equivalents of pentafluorophenol per equivalent of the N,N-dimethylaniline.

Abstract: A composition useful for activating catalysts for olefin polymerization Is provided. The composition is derived from at least: carrier; treated organoaluminoxy compound: and ionic compound having at feast one active proton.

Abstract: A composition useful for activating catalysts for olefin polymerization is provided. The composition is derived from at least: carrier; organoaluminoxy compound; N,N-dimethylaniline and pentaflurophenol in amounts such that them are at least two equivalents of pentafluorophenol per equivalent of the N,N-dimethylaniline.

Abstract: A composition useful for activating catalysts for olefin polymerization is provided. The composition is derived from at least: carrier; organoaluminoxy compound; N,N-dimethylaniline and pentaflurophenol in amounts such that them are at least two equivalents of pentafluorophenol per equivalent of the N,N-dimefhylaniline.

Abstract: A composition useful for activating catalysts for olefin polymerization is provided. The composition is derived from at least; carrier containing water; organoaluminum compound; N,N-dimethylaniline and pentafluorophenol in amounts such that there are at least two equivalents of pentafluorophenol per equivalent of the N,N-dimethylaniline.

Abstract: A new ionic compound is provided that is derived from N,N-dimethylaniline and pentafluorophenol in amounts such that there are at least 2 equivalents of pentafluorophenol per equivalent of the N,N-dimethylaniline.

Abstract: A composition useful for activating catalysts for olefin polymerization Is provided. The composition is derived from at least: carrier; treated organoaluminoxy compound: and ionic compound having at feast one active proton.

Abstract: A composition useful for activating catalysts for olefin polymerization is provided. The composition is derived from at least: carrier; organoaluminoxy compound; component having at least one electron withdrawing group and at least one active proton; and Lewis base. Alternatively, the composition is derived from at least: carrier; organoaluminoxy compound; component having at least one electron withdrawing group and at least one active proton; and ionic compound having at least one active proton. Alternatively, the composition is derived from at least: carrier; organoaluminoxy compound; component having at least one electron donating group and at least one active proton; and, optionally, Lewis base.