Abstract: The present disclosure provides a method for estimating a body size and weight of a pig based on deep learning, and relates to the technical field of deep learning. The present disclosure predicts the weight of the pig by using a convolutional neural network. Relevant features are learned by the convolutional neural network, and feature engineering extraction is not needed to be established, so that extracted features are more comprehensive, and the convolutional neural network is superior to a linear model in processing of noisy data and nonlinear problems of data. Images of the pig are shot by an ordinary two-dimensional (2d) color camera.

Abstract: A control method of an electronic ballast of a gas discharge lamp (HID), to generate a PWM1 signal for controlling on/off of a left upper arm switch, a PWM2 signal for controlling on/off of a right upper arm switch, a PWM3 signal for controlling on/off of a left lower arm switch, and a PWM4 signal for controlling on/off of a right lower arm switch, the PWM1 signal and the PWM3 signal are low frequency signals and have an identical frequency and an opposite phase, the PWM2 signal and the PWM4 signal are high frequency signals. Duty ratios of PWM signals for controlling arms of a semiconductor full bridge circuit are changed according to a power consumption of the gas discharge lamp (HID) to control the power consumption of the gas discharge lamp (HID).

Abstract: A control method of an electronic ballast of a gas discharge lamp (HID), to generate a PWM1 signal for controlling on/off of a left upper arm switch, a PWM2 signal for controlling on/off of a right upper arm switch, a PWM3 signal for controlling on/off of a left lower arm switch, and a PWM4 signal for controlling on/off of a right lower arm switch, the PWM1 signal and the PWM3 signal are low frequency signals and have an identical frequency and an opposite phase, the PWM2 signal and the PWM4 signal are high frequency signals. Duty ratios of PWM signals for controlling arms of a semiconductor full bridge circuit are changed according to a power consumption of the gas discharge lamp (HID) to control the power consumption of the gas discharge lamp (HID).