Abstract: Provided is a briefcase design smart screen including an upper housing and a lower housing, a rear part of the upper housing is hingedly connected to a rear part of the lower housing, a speaker assembly is provided in the upper housing, a control assembly and a display assembly are provided in the lower housing, and the control assembly is electrically connected to the speaker assembly; and the display assembly includes a support frame, a connecting arm, and a display screen, in which one end of the support frame is rotatably arranged in the lower housing, the other end of the support frame is hingedly connected to one end of the connecting arm, the display screen is rotatably disposed at the other end of the connecting arm, and the display screen is electrically connected to the control assembly.

Abstract: A processor implemented method including iteratively training a model through repeated training operations, including calculating a respective sensitivity of each layer of plural layers included in the model, the model including a machine-learning model, calculating a first maintenance probability for a t-th repeated training of the model, calculating a respective maintenance probability of each of the plural layers of the model based on the respective sensitivity of each of the plural layers and based on the first maintenance probability for the t-th repeated training of the model, and performing the t-th repeated training of the model including training selected one or more maintenance layers, of the plural layers of the model, whose respective maintenance probabilities satisfy a first predetermined maintenance condition.

Abstract: Described is a nucleic acid ligand, a mixture thereof, and the use thereof. The mixture contains two or more nucleic acid polymerase substrate analogs. The nucleic acid polymerase substrate analog is a single nucleic acid molecule or nucleic acid molecule analog which forms complementary pairing within a molecule, or a single or two nucleic acid molecules or nucleic acid molecule analogs which form complementary pairing between molecules; and a structure formed thereby has the characteristics of a nucleic acid polymerase substrate. The nucleic acid polymerase substrate analog is suitable for all polymerases and can be widely used in the field of nucleic acid amplification. The 3? end of the nucleic acid ligand has a modification which inhibits the extension thereof.

Abstract: Disclosed is a nucleic acid extraction method. By using a quaternary ammonium salt, nucleic acid molecules in a solution are adsorbed to adsorbing materials such as silicon beads, magnetic beads, diatomite or silica gel or precipitated, thereby improving efficiency of nucleic acid purification and recovery.

Abstract: A method with quantization for a deep learning model includes: determining a second model by quantizing a first model based on a quantization parameter; determining a real value of multi optimization target parameter by testing the second model; calculating a loss function based on the real value of the multi optimization target parameter, an expected value of the multi optimization target parameter, and a constraint value of the multi optimization target parameter; updating the quantization parameter based on the loss function and using the second model as the first model; iteratively executing the foregoing operations until a preset condition is satisfied; and in response to the preset condition being satisfied, determining an optimal quantization parameter and using, as a final quantization model, the first model that executes quantization based on the optimal quantization parameter.