Abstract: Disclosed are a polyethylene glycol conjugate drug, and a preparation method therefor and the use thereof. Specifically, the present invention relates to a polyethylene glycol conjugate drug represented by formula A or a pharmaceutically acceptable salt thereof, a method for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, an intermediate for preparing the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, a pharmaceutical composition comprising the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof, and the use of the polyethylene glycol conjugate drug or the pharmaceutically acceptable salt thereof in the preparation of a drug.

Abstract: Disclosed are an optical detection method and an optical detection apparatus for a fatigue state of a user, and an optical detection device, this application relates to the field of detection technology, and is for improving accuracy of detection of the fatigue state. An optical detection method includes: irradiating eyes of the user with an infrared light; obtaining an intensity of an infrared light reflected by the eyes of the user; and determining whether the user is in a fatigue state based on the intensity of the reflected infrared light.

Abstract: Disclosed are an optical detection method and an optical detection apparatus for a fatigue state of a user, and an optical detection device, this application relates to the field of detection technology, and is for improving accuracy of detection of the fatigue state. An optical detection method includes: irradiating eyes of the user with an infrared light; obtaining an intensity of an infrared light reflected by the eyes of the user; and determining whether the user is in a fatigue state based on the intensity of the reflected infrared light.

Abstract: The present invention relates to a leakage proof member for buildings, particularly to a compressive stress water stopper, which functions as or substitutes a water stop strip in a concrete deformation joint. The compressive stress water stopper may be pre-installed before casting concrete or installed after concrete is cast. The compressive stress water stopper has an upper plate, a fork-shaped rubber plate, a tapered rubber plate and a lower plate whose screw holes are alternately inserted by a plurality of fastening bolts A and B which are fastened by fastening nuts, respectively. The stress and the adhering property of the bicomponent polysulfide rubber securely attach the fork-shaped sheets of the fork-shaped rubber plate to the concrete surfaces at the two sides of the deformation joint and seal the screw holes and the clearances in the concrete.

Abstract: The present invention relates to a leakage proof member for buildings, particularly to a compressive stress water stopper, which functions as or substitutes a water stop strip in a concrete deformation joint. The compressive stress water stopper may be pre-installed before casting concrete or installed after concrete is cast. The compressive stress water stopper has an upper plate, a fork-shaped rubber plate, a tapered rubber plate and a lower plate whose screw holes are alternately inserted by a plurality of fastening bolts A and B which are fastened by fastening nuts, respectively. The stress and the adhering property of the bicomponent polysulfide rubber securely attach the fork-shaped sheets of the fork-shaped rubber plate to the concrete surfaces at the two sides of the deformation joint and seal the screw holes and the clearances in the concrete.