Abstract: A bus breaker control circuit for a railway vehicle includes a close relay, an open relay, a power supply circuit for a bus breaker, a power supply circuit for the hold relay, and a delay module; the power supply circuit for the hold relay comprises a normally-closed contact of the open relay, an auxiliary normally-open contact of the bus breaker, and the hold relay sequentially connected in series to a train power supply; the power supply circuit for the bus breaker comprises a normally-open contact of the hold relay and the bus breaker sequentially connected in series to the train power supply; and the delay module is connected in parallel with the hold relay, normally-closed contacts of the delay module are connected in series to the power supply circuit for the close relay.

Abstract: A bus breaker control circuit for a railway vehicle includes a close relay, an open relay, a power supply circuit for a bus breaker, a power supply circuit for the hold relay, and a delay module; the power supply circuit for the hold relay comprises a normally-closed contact of the open relay, an auxiliary normally-open contact of the bus breaker, and the hold relay sequentially connected in series to a train power supply; the power supply circuit for the bus breaker comprises a normally-open contact of the hold relay and the bus breaker sequentially connected in series to the train power supply; and the delay module is connected in parallel with the hold relay, normally-closed contacts of the delay module are connected in series to the power supply circuit for the close relay.

Abstract: A pantograph remote control circuit for an unmanned metro train includes a startup circuit of an auxiliary inverter emergency start relay, a control circuit of an auxiliary inverter energized relay, and a startup circuit of a pantograph raising relay. A first normally-open contact pair of the pantograph raising relay is serially connected to a pantograph raising electromagnetic valve and then connected to an output terminal of a battery. At the meantime, the bootstrap is remotely controlled by the internal ATC wake-up module when the power supply is fed by the battery, and there is no need for the driver to operate on the spot, thereby saving time for the driver from operations and reducing the potential misoperation of the driver.

Abstract: A pantograph remote control circuit for an unmanned metro train includes a startup circuit of an auxiliary inverter emergency start relay, a control circuit of an auxiliary inverter energized relay, and a startup circuit of a pantograph raising relay. A first normally-open contact pair of the pantograph raising relay is serially connected to a pantograph raising electromagnetic valve and then connected to an output terminal of a battery. At the meantime, the bootstrap is remotely controlled by the internal ATC wake-up module when the power supply is fed by the battery, and there is no need for the driver to operate on the spot, thereby saving time for the driver from operations and reducing the potential misoperation of the driver.

Abstract: A multimedia file skipping method. The skipping method adds obtained increased amount of time to a current decoding time stamp to determine a target time stamp, determines a PCR (Program Clock Reference) corresponding to the target time stamp as a PCR prediction value; determines a position offset corresponding to the PCR prediction value as a target position offset according to a linear relationship between the PCR and position offset of the multimedia file; and skips to the target position offset and plays the multimedia file from this position. By the aforementioned, it is not necessary to set a time stamp index file, and calculation is performed by utilizing the linear relationship between the PCR and the position offset, and thus the amount of calculation is reduced, time cost is reduced, and skipping speed is significantly improved.

Abstract: A multimedia file skipping method. The skipping method adds obtained increased amount of time to a current decoding time stamp to determine a target time stamp, determines a PCR (Program Clock Reference) corresponding to the target time stamp as a PCR prediction value; determines a position offset corresponding to the PCR prediction value as a target position offset according to a linear relationship between the PCR and position offset of the multimedia file; and skips to the target position offset and plays the multimedia file from this position. By the aforementioned, it is not necessary to set a time stamp index file, and calculation is performed by utilizing the linear relationship between the PCR and the position offset, and thus the amount of calculation is reduced, time cost is reduced, and skipping speed is significantly improved.