Abstract: A switching tube control method and device, and a direct-current converter. In the solution, after a switching tube on a leading bridge arm in a phase-shifted full-bridge converter is disconnected and a current on a transformer is not greater than a current preset value, a corresponding switching tube on a lagging bridge arm is controlled to be disconnected, and it is ensured that the current flowing through the switching tube is small when the switching tube on the lagging bridge arm is disconnected, such that the soft turn-off of the switching tube on the lagging bridge arm is realized, the loss is reduced, the anti-interference capability of the switching tube is improved, and the EMS performance of the switching tube is improved.

Abstract: Disclosed is a sodium petroleum sulfonate collector for fluorite flotation, comprising sodium petroleum sulfonate and non-polar oil, wherein the molar ratio of the non-polar oil to the sodium petroleum sulfonate is 3.33-5.67, the sodium petroleum sulfonate comprises raw material oil and active substance, the molecular weight of the raw material oil is 350-450, the molecular weight of the sodium petroleum sulfonate is 500-750, the aromatic hydrocarbon comprises benzene ring hydrocarbon and naphthalene ring hydrocarbon, the content of the benzene ring hydrocarbon is 5% to 11%, and the content of the naphthalene ring hydrocarbon is 5% to 5.2%, the raw material oil needs to be sulfonated by sulfur trioxide, and the molar ratio of the aromatic hydrocarbon to the sulfur trioxide in the raw material oil is 2.4 to 5. The sodium petroleum sulfonate collector proposed by this disclosure is both efficient and low temperature resistant.

Abstract: A method for activating an application function, including obtaining an activation instruction sent by a user within a blank space accessible to the user on an application interface and activating at least one application function according to the activation instruction, is provided. The method allows a user to send an activation instruction from within a blank space accessible to the user on an application interface, and activate a corresponding application function, without the need of operating a preset function button as existing technologies do, thus facilitating a convenient and rapid activation of a corresponding function and improving the convenience for a user to use application functions.

Abstract: A method for activating an application function is disclosed. The method includes obtaining an activation instruction sent by a user within a blank space accessible to the user on an application interface; and activating at least one application function according to the activation instruction. The present disclosure allows a user to send an activation instruction from within a blank space accessible to the user on an application interface, and activate a corresponding application function, without the need of operating a preset function button as existing technologies do. The technical solution of the present disclosure is not limited by application scenarios and has a higher flexibility, thus facilitating a convenient and rapid activation of a corresponding function and improving the convenience for a user to use application functions.

Abstract: A method for activating an application function includes obtaining an activation instruction sent by a user within a blank space accessible to the user on an application interface and activating at least one application function according to the activation instruction. The method allows the user to send the activation instruction from within the blank space accessible to the user on the application interface and activate a corresponding application function, without the need of operating a preset function button as in existing technologies. The technical solution is not limited by application scenarios and has a higher flexibility thus facilitating a convenient and rapid activation of a corresponding function and improving the convenience for the user to use application functions.

Abstract: A surgical instrument for removing a gallbladder is provided. The surgical instrument includes a handle assembly, an elongated body portion extending distally from the handle assembly, and a capture portion operably mounted on a distal end of the elongated body portion. The capture portion defines a tissue receiving opening when in an open configuration and is configured for receipt through an incision when in the capture portion is in a closed configuration. The capture portion includes at least one sharpened member for cutting tissue received within the tissue receiving opening as the capture portion moves from the open configuration to the closed configuration. Also provided is a method of removing a gallbladder using a surgical instrument.

Abstract: A surgical instrument for removing a gallbladder is provided. The surgical instrument includes a handle assembly, an elongated body portion extending distally from the handle assembly, and a capture portion operably mounted on a distal end of the elongated body portion. The capture portion defines a tissue receiving opening when in an open configuration and is configured for receipt through an incision when in the capture portion is in a closed configuration. The capture portion includes at least one sharpened member for cutting tissue received within the tissue receiving opening as the capture portion moves from the open configuration to the closed configuration. Also provided is a method of removing a gallbladder using a surgical instrument.

Abstract: A surgical instrument for removing a gallbladder is provided. The surgical instrument includes a handle assembly, an elongated body portion extending distally from the handle assembly, and a capture portion operably mounted on a distal end of the elongated body portion. The capture portion defines a tissue receiving opening when in an open configuration and is configured for receipt through an incision when in the capture portion is in a closed configuration. The capture portion includes at least one sharpened member for cutting tissue received within the tissue receiving opening as the capture portion moves from the open configuration to the closed configuration. Also provided is a method of removing a gallbladder using a surgical instrument.

Abstract: A method for activating an application function is disclosed. The method includes obtaining an activation instruction sent by a user within a blank space accessible to the user on an application interface; and activating at least one application function according to the activation instruction. The present disclosure allows a user to send an activation instruction from within a blank space accessible to the user on an application interface, and activate a corresponding application function, without the need of operating a preset function button as existing technologies do. The technical solution of the present disclosure is not limited by application scenarios and has a higher flexibility, thus facilitating a convenient and rapid activation of a corresponding function and improving the convenience for a user to use application functions.

Abstract: A surgical instrument for removing a gallbladder is provided. The surgical instrument includes a handle assembly, an elongated body portion extending distally from the handle assembly, and a capture portion operably mounted on a distal end of the elongated body portion. The capture portion defines a tissue receiving opening when in an open configuration and is configured for receipt through an incision when in the capture portion is in a closed configuration. The capture portion includes at least one sharpened member for cutting tissue received within the tissue receiving opening as the capture portion moves from the open configuration to the closed configuration. Also provided is a method of removing a gallbladder using a surgical instrument.