Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for training a machine learning model on training data. In one aspect, one of the methods include: obtaining a training data set comprising a plurality of training inputs; obtaining data defining an original search space of a plurality of candidate data augmentation policies; generating, from the original search space, a compact search space that has one or more global hyperparameters; and training the machine learning model on the training data using one or more final data augmentation policies generated from the compact search space.

Abstract: The present disclosure provides a preparation method for hydrothermal synthesis of fly ash silicate aggregate including: mixing sodium metasilicate, potassium hydroxide, and inorganic-organic hybrid excitation monomer as raw materials to obtain an inorganic-organic composite activator; preparing a silicate aggregate raw material, mixing measured fly ash, carbide slag, quicklime, and vitrified micro bubble by mass, adding the inorganic-organic composite activator and continue stirring to produce a mixture; forming a ball disc, wetting an expanded perlite that forms a core of the ball by spraying water, adding a prepared mixture, spraying water while adding, standing and curing, performing a maturation and activation treatment in an autoclave, undergoing a silicon calcium reaction for a hydrothermal synthesis to obtain the silicate aggregates.

Abstract: A zero-crossing correction circuit for a switching converter having a main power switch and a synchronous power switch connected in series, can include: a detection circuit configured to detect an on-off state of a body diode of the synchronous power switch in a first time interval after the synchronous power switch is turned off and generate a detection signal; and a control and adjustment circuit configured to adjust a turn-off moment of the synchronous power switch according to an on-off state of the main power switch in a second time interval after the synchronous power switch is turned off and the detection signal

Abstract: A ripple voltage control circuit for controlling a switching converter, including: a control circuit configured to superimpose a compensation voltage and a ripple voltage on a feedback voltage that represents an output voltage of the switching converter, in order to generate a ripple signal; the control circuit being configured to superimpose a bias voltage on a reference voltage that represents a desired output voltage of the switching converter as a reference signal, and to compare the ripple signal against the reference signal in order to generate a turn-on signal for a main power switch of the switching converter; and where the compensation voltage adaptively varies with a duty cycle of the main power switch, such that the ripple signal is independent of the duty cycle, in order to maintain the feedback voltage as equal to the reference voltage.

Abstract: A ripple voltage control circuit for controlling a switching converter, including: a control circuit configured to superimpose a compensation voltage and a ripple voltage on a feedback voltage that represents an output voltage of the switching converter, in order to generate a ripple signal; the control circuit being configured to superimpose a bias voltage on a reference voltage that represents a desired output voltage of the switching converter as a reference signal, and to compare the ripple signal against the reference signal in order to generate a turn-on signal for a main power switch of the switching converter; and where the compensation voltage adaptively varies with a duty cycle of the main power switch, such that the ripple signal is independent of the duty cycle, in order to maintain the feedback voltage as equal to the reference voltage.

Abstract: A method of transmitting raw data by a data acquisition system in a CT scanning system, wherein the CT scanning system comprises a rotational part of a gantry with at least one raw data backup memory, and wherein the data acquisition system is configured to adopt the at least one backup memory for storing a backup of the raw data. The method comprising: generating the raw data as scanned; storing generated raw data in the at least one backup memory; transmitting the raw data to an operation console in the CT scanning system; and repeating generating, storing, and transmitting of the raw data in the case of an unfinished scan, until the unfinished scan is finished.

Abstract: A method of transmitting raw data by a data acquisition system in a CT scanning system, wherein the CT scanning system comprises a rotational part of a gantry with at least one raw data backup memory, and wherein the data acquisition system is configured to adopt the at least one backup memory for storing a backup of the raw data. The method comprising: generating the raw data as scanned; storing generated raw data in the at least one backup memory; transmitting the raw data to an operation console in the CT scanning system; and repeating generating, storing, and transmitting of the raw data in the case of an unfinished scan, until the unfinished scan is finished.