Abstract: The present disclosure provides a method for optimizing mask parameters, and the method includes: acquiring a test pattern, light source parameters, and initial mask parameters, the initial mask parameters including a mask thickness and an initial mask sidewall angle; generating multiple sets of candidate mask parameters according to the initial mask sidewall angle in the initial mask parameters; the multiple sets of candidate mask parameters including different mask sidewall angles and the same mask thickness; obtaining an imaging contrast of each set of candidate mask parameters based on the test pattern and the light source parameters; and selecting an optimal mask sidewall angle from the multiple sets of candidate mask parameters according to the imaging contrasts.

Abstract: A power conversion system, an energy storage system and a power supply method are provided. The power conversion system includes a battery management system and an auxiliary power supply. A positive electrode of the auxiliary power supply is connected to a positive electrode of a battery rack. The auxiliary power supply is configured to obtain power from the battery rack, convert the power obtained from the battery rack, and supply the converted power to the battery management system and a load in the power conversion system. The battery management system is configured to sample a voltage of the battery rack and a current of the battery rack, and control charging and discharging of the battery rack based on the voltage and the current.

Abstract: Aspects of the present disclosure relate to a power trigger mechanism for a power tool, comprising a first locking device and a second locking device, wherein the first locking device and the second locking device can be actuated independently of each other. Further aspects of the present disclosure relate to a power tool comprising said power trigger, and a method of operating said power trigger. The present invention provides a power trigger with intuitive operation, improved safety and improved control and stability of the power tool.

Abstract: The disclosure provides a method for breeding Carassius auratus strains without intermuscular bones, which comprises designing knockout target sites for the two copies of the bmp6, bmp6a and bmp6b, in the Carassius auratus genome, and then obtaining F2 generation individuals from a homozygous line with bmp6a and bmp6b double gene mutation through two rounds of gene knockout and screening, and then propagating by using the F2 generation individuals from the homozygous line with bmp6a and bmp6b double gene mutation to form a new Carassius auratus strain with intermuscular bone-deficient. Strains of Carassius auratus with less than 20 intermuscular bones and without intermuscular bones are obtained by the method of the present disclosure.

Abstract: A sample three-dimensional image is acquired. The sample three-dimensional image is labeled with actual location information of an actual region of a three-dimensional target. One or more pieces of prediction region information corresponding to one or more sub-images of the sample three-dimensional image are acquired by performing target detection on the sample three-dimensional image using the three-dimensional target detection model. Each piece of the prediction region information includes prediction confidence and prediction location information of a prediction region. A loss value of the three-dimensional target detection model is determined using the actual location information and the one or more pieces of the prediction region information. A parameter of the three-dimensional target detection model is adjusted using the loss value.