Abstract: A ternary composite catalyst of diethylzinc and yttrium trifluoroacetate loaded on chitin for copolymerization of carbon dioxide, epoxy cyclohexane and ethylene oxide is provided. The ternary composite catalyst exhibits strong catalytic activity for the ternary copolymerization of carbon dioxide, cyclohexane oxide and ethylene oxide. A high molecular weight and content of ester chain is maintained. Conventional rare earth ternary catalysts leave residues in the polymer, and the polymer requires rinsing with hydrochloric acid. The ternary composite catalyst can be removed through filtration. The average molecular weight of the resulting polycarbonate is more than 100,000, and the ester chain content is more than 90%. The resulting polymer has a lower metal content. The ternary composite catalyst can be used in agricultural film, disposable packaging and other polymer materials.

Abstract: The present application provides a filling device for refilling a liquid storage tank in a vehicle. The filling device includes a support seat, a filling tank, and a connecting device. The support seat is arranged in a vehicle body and defines a containment space. The filling tank is movably connected to the support seat and is movable relative to the support seat between a filling position and a closed position. The filling tank includes a filling space, and a filling port and a liquid outlet that communicate with the filling space. The filling port is hidden in the vehicle body when the filling tank is in the closed position, and when the filling tank is in the filling position, the filling port is accessible from outside the vehicle body, enabling refilling of liquid from the filling port. The connecting device connects the filling tank to the support seat so that the filling tank can be moved in a translational manner relative to the support seat.

Abstract: A method for encrypting a terminal with a subscriber identity card includes: a terminal storing the unique identity number of a subscriber identity card; the terminal detecting an operation of a user and authenticating a current user according to authentication conditions set by the user. Authenticating the current subscriber refers to that the terminal reads the unique identity number of the current subscriber identity card, and compares the read unique identity number of current subscriber identity card with the stored unique identity number of subscriber identity card; if they are the same, the terminal is controlled to enter a normal working state; and if they are different, the terminal locks by itself or disables the access of current user. The present document encrypts a mobile terminal with a subscriber identity card, so as to make the encryption technique of the terminal more secure and reliable, and improve the user experience.

Abstract: A method for encrypting a terminal with a subscriber identity card includes: a terminal storing the unique identity number of a subscriber identity card; the terminal detecting an operation of a user and authenticating a current user according to authentication conditions set by the user. Authenticating the current subscriber refers to that the terminal reads the unique identity number of the current subscriber identity card, and compares the read unique identity number of current subscriber identity card with the stored unique identity number of subscriber identity card; if they are the same, the terminal is controlled to enter a normal working state; and if they are different, the terminal locks by itself or disables the access of current user. The present document encrypts a mobile terminal with a subscriber identity card, so as to make the encryption technique of the terminal more secure and reliable, and improve the user experience.