Abstract: Disclosed is a polymer composition including a polyester copolymer and a biodegradable polymer, wherein the polyester copolymer includes two types of ester bond-forming monomer residues as main structural units, when the two types of ester bond-forming monomers are defined as “monomer A” and “monomer B”, respectively, the polyester copolymer satisfies (1) to (3) below, the biodegradable polymer has a melting point of 100° C. or higher, and the biodegradable polymer is included in an amount of 0.1% by weight or more and less than 30% by weight in 100% by weight of the total of the polyester copolymer and the biodegradable polymer. The present invention provides a polymer composition having low Young's modulus and high tensile strength. (1) An R value represented by the following formula is 0.45 or more and 0.99 or less.

Abstract: Implementations of the present specification disclose fare payment method, apparatus, and device. In the implementations of the present specification, an application can be pre-installed on a terminal device that supports HCE. When a user takes the ride, the user can move the terminal device to a vicinity of a collection device of a public transportation system. The collection device can send an HCE-based routing instruction to the terminal device, so that an operating system of the terminal device sends the routing instruction to the application based on an application identifier of the application included in the routing instruction, and then the application establishes an NFC connection with the collection device in response to the routing instruction.

Abstract: There is provided an immunopotentiator comprising, as an active ingredient, a modified ?-glucan which ?-glucan and poly(hydroxy acid) are covalently bonded. The immunopotentiator can potently enhance the immunopotentiating effect of ?-glucan.

Abstract: Disclosed are an associated copolymer, a method for preparation of a polymer and a polymer prepared with the method, a use of the associated copolymer and/or the polymer in drilling fluids, and a drilling fluid containing the associated copolymer and/or the polymer. The associated copolymer comprises acrylamide structural units, zwitter-ionic structural units, and cationic polyamine structural units at a specific proportion, and the cationic polyamine structural units have specific kinematic viscosity and cationic degree; thus, when the associated copolymer is used as a viscosity improver for drilling fluids, the obtained drilling fluid not only has favorable apparent viscosity after it is aged at a high temperature, but also has high dynamic shear force, and is resistant to high temperature up to 200° C. or above, resistant to NaCl up to saturated concentration, and resistant to CaCl2 up to 20 wt % concentration.

Abstract: Disclosed are an associated copolymer, a method for preparation of a polymer and a polymer prepared with the method, a use of the associated copolymer and/or the polymer in drilling fluids, and a drilling fluid containing the associated copolymer and/or the polymer. The associated copolymer comprises acrylamide structural units, zwitter-ionic structural units, and cationic polyamine structural units at a specific proportion, and the cationic polyamine structural units have specific kinematic viscosity and cationic degree; thus, when the associated copolymer is used as a viscosity improver for drilling fluids, the obtained drilling fluid not only has favorable apparent viscosity after it is aged at a high temperature, but also has high dynamic shear force, and is resistant to high temperature up to 200° C. or above, resistant to NaCl up to saturated concentration, and resistant to CaCl2 up to 20 wt % concentration.

Abstract: There is provided an immunopotentiator comprising, as an active ingredient, a modified ?-glucan which ?-glucan and poly(hydroxy acid) are covalently bonded. The immunopotentiator can potently enhance the immunopotentiating effect of ?-glucan.