Abstract: The present disclosure provides a driving method for a liquid crystal display panel and a non-transitory computer storage medium. The driving method includes: for the plurality of sub-pixels, adopting a first gray-level table for displaying a picture in other frame pictures other than a first frame picture in each of the plurality of predetermined periods, the first gray-level table including a plurality of first gray-level values; and adopting a second gray-level table for displaying a picture in the first frame picture in each of the plurality of predetermined periods, the second gray-level table including a plurality of second gray-level values.

Abstract: Disclosed in the present invention is a voltage and current control method for a direct-current transmission system. The method comprises: calculating a DC voltage reference value of a voltage source converter of a DC voltage control end, on the basis whether a direct-current voltage end of a direct-current pole of a direct-current transmission system substantially controls a direct-current voltage; using ½ of the calculated direct-current voltage reference value of the voltage source converter as a bridge arm voltage direct-current bias, calculating a difference between the direct-current voltage reference value of the voltage source converter and a measured direct-current voltage value, and inputting the difference into a direct-current voltage control outer loop of the voltage source converter to perform closed-loop control, so as to control the direct-current voltage or the direct current of the direct-current pole.

Abstract: Disclosed in the present invention is a voltage and current control method for a direct-current transmission system. The method comprises: calculating a DC voltage reference value of a voltage source converter of a DC voltage control end, on the basis whether a direct-current voltage end of a direct-current pole of a direct-current transmission system substantially controls a direct-current voltage; using ½ of the calculated direct-current voltage reference value of the voltage source converter as a bridge arm voltage direct-current bias, calculating a difference between the direct-current voltage reference value of the voltage source converter and a measured direct-current voltage value, and inputting the difference into a direct-current voltage control outer loop of the voltage source converter to perform closed-loop control, so as to control the direct-current voltage or the direct current of the direct-current pole.

Abstract: The present invention relates to a method for obtaining a natural mixture of conjugated estrogens from urine of pragnant mares (PMU) and use of a macroporous adsorption resin in the method. The method for obtaining a natural mixture of conjugated estrogen from PMU includes the steps of pretreating raw PMU; adsorbing the natural mixture of conjugated estrogens contained in PMU with a macroporous adsorption resin; washing the macroporous adsorption resin laden with the mixture of conjugated estrogens with an alkaline aqueous solution; and eluting the washed adsorption resin with an eluting agent to obtain the mixture of conjugated estrogens. The macroporous adsorption resin is a styrene-divinylbenzene semipolar macroporous adsorption resin with ester group structure. The method according to the invention solves the problems of low adsorptive capacity and high cost existed in the conventional methods, and is suitable for large-scale production.

Abstract: The present invention relates to a method for obtaining a natural mixture of conjugated estrogens from urine of pragnant mares (PMU) and use of a macroporous adsorption resin in the method. The method for obtaining a natural mixture of conjugated estrogen from PMU includes the steps of pretreating raw PMU; adsorbing the natural mixture of conjugated estrogens contained in PMU with a macroporous adsorption resin; washing the macroporous adsorption resin laden with the mixture of conjugated estrogens with an alkaline aqueous solution; and eluting the washed adsorption resin with an eluting agent to obtain the mixture of conjugated estrogens. The macroporous adsorption resin is a styrene-divinylbenzene semipolar macroporous adsorption resin with ester group structure. The method according to the invention solves the problems of low adsorptive capacity and high cost existed in the conventional methods, and is suitable for large-scale production.