Abstract: Provided are a series of 5,6-dihydrothieno[3,4-h]quinazoline compounds as represented by formula (P) and pharmaceutically acceptable salts thereof, and the use of the compounds or pharmaceutically acceptable salts thereof in the preparation of solid tumor drugs, such as solid tumor drugs associated with selective PLK1 inhibitors.

Abstract: A ship weighing system and a weighing method thereof include a collection module, a computing server, a wireless router, a display control terminal, and a network switch, which are installed in the ship. The collection module synchronously collects water level data of a stern and trim angle data of a front portion, a middle portion, and a rear portion of the ship. The computing server respectively calculates, based on the water level data collected by the collection module, an accumulated volume of the ship below a slice section parallel to a bottom plane of the ship corresponding to the water level data and a volume of a trim wedge formed by the slice section and an actual horizontal plane. The computing server combines results and corrects a volume of a vertical arch wedge in the middle portion of the ship to obtain a displacement volume of the ship.

Abstract: The present invention discloses a polyvinyl chloride floor with high stain resistance and easy cleaning functions. The polyvinyl chloride floor includes a polyvinyl chloride floor layer and a stain-resistant surface layer, wherein the stain-resistant surface layer is formed by co-extruding an outer protective layer, a functional layer and an adhesive layer; the outer protective layer is a fluorine-containing polymer; the functional layer is formed by mixing the fluorine-containing polymer, a hot melt adhesive and functional aids; the adhesive layer is formed by mixing the fluorine-containing polymer and the hot melt adhesive; and the stain-resistant surface layer is in hot-melt adhesion connection with the polyvinyl chloride floor layer through the adhesive layer. The present invention has advantages of green environmental protection, high wear resistance, water resistance, moisture resistance, bacterial resistance, stain resistance and difficulty in leaving traces.