Abstract: A method of improving grinding, grading and capacity of ores by reducing a fineness content ratio ?0 in settled ores includes providing a two-stage ore grinding and grading system including a first fully closed circuit including a grinder and a hydrocyclone, or a two-stage ore grinding and grading system including a first-stage open circuit, and controlling parameters for ore grinding and grading as follows: controlling a dc an value of a point B on a separation cone of a second-stage ?500 mm hydrocyclone; controlling a fineness content ratio ?0 in settled ores; controlling a second-stage ore grinding and grading load Q2; and acquiring a first-stage grinding, grading and capacity Q of ores.

Abstract: A method for controlling a vehicle is applied to an in-vehicle terminal, includes: obtaining current position information of a vehicle and a preset electronic fence, determining a travel direction according to the current position information and the preset electronic fence; when determining that the vehicle travels from the inside of the preset electronic fence to the outside of the preset electronic fence, determining a current position state of the vehicle according to the current position information, where the position state represents a relative position of the vehicle and the preset electronic fence; determining whether the current position state is the same as a previous position state of the vehicle; and when the current position state is different from the previous position state, performing one or two of outputting warning information and sending a key shielding signal, to enable a key controller to shield a key control signal of the vehicle.

Abstract: A method for controlling a vehicle is applied to an in-vehicle terminal, includes: obtaining current position information of a vehicle and a preset electronic fence, determining a travel direction according to the current position information and the preset electronic fence; when determining that the vehicle travels from the inside of the preset electronic fence to the outside of the preset electronic fence, determining a current position state of the vehicle according to the current position information, where the position state represents a relative position of the vehicle and the preset electronic fence; determining whether the current position state is the same as a previous position state of the vehicle; and when the current position state is different from the previous position state, performing one or two of outputting warning information and sending a key shielding signal, to enable a key controller to shield a key control signal of the vehicle.