Abstract: The present disclosure relates to the technical field of artificial cores, in particular to a preparation method of artificial sandstone and/or conglomerate core based on lithology and pore structure control. The method comprises the following steps: mixing and molding sand particles and a inorganic cementing agent in sequence, and further adding a curing agent for performing solidification to prepare an artificial sandstone and/or conglomerate core; wherein composition of the sand particles is determined according to lithology and pore structure of the artificial sandstone and/or conglomerate core. The present disclosure combines the lithology and the pore structure of the artificial sandstone and/or conglomerate core with the composition of the sand particles, particularly regulates and controls the composition of the sand particles according to the pore throat distribution pattern and the average pore throat radius, thereby performing precise control on the artificial sandstone and/or conglomerate core.

Abstract: The present disclosure relates to the technical field of artificial cores, in particular to a preparation method of artificial sandstone and/or conglomerate core based on lithology and permeability control. The method comprises the following steps: mixing and molding sand particles and a cementing agent in sequence, and further adding a curing agent for performing solidification to prepare the artificial sandstone and/or conglomerate core; wherein composition of the sand particles is determined according to properties of the artificial sandstone and/or conglomerate core comprising lithology and permeability. The present disclosure combines the properties of the artificial sandstone and/or conglomerate core with the proportion of the sand particles, particularly regulates and controls the composition of the sand particles according to the lithology and permeability of the artificial sandstone and/or conglomerate core, thereby performing precise control on the artificial sandstone and/or conglomerate core.

Abstract: An image processing apparatus, which includes a first physical computing circuit, configured to receive a plurality of first analog signals output by an image sensor, and perform a convolution operation on the plurality of first analog signals to obtain a second analog signal. The plurality of first analog signals are in a one-to-one correspondence with a plurality of pieces of pixel data of a to-be-recognized image. The first physical computing circuit comprises at least one multiplication circuit array and at least one subtraction circuit, the at least one multiplication circuit array is in a one-to-one correspondence with the at least one subtraction circuit, a multiplication circuit in each multiplication circuit array comprises a differential pair transistor, each multiplication circuit array implements the convolution operation on the plurality of first analog signals using a plurality of multiplication circuits and a corresponding subtraction circuit.

Abstract: An image processing apparatus, which includes a first physical computing circuit, configured to receive a plurality of first analog signals output by an image sensor, and perform a convolution operation on the plurality of first analog signals to obtain a second analog signal. The plurality of first analog signals are in a one-to-one correspondence with a plurality of pieces of pixel data of a to-be-recognized image. The first physical computing circuit comprises at least one multiplication circuit array and at least one subtraction circuit, the at least one multiplication circuit array is in a one-to-one correspondence with the at least one subtraction circuit, a multiplication circuit in each multiplication circuit array comprises a differential pair transistor, each multiplication circuit array implements the convolution operation on the plurality of first analog signals using a plurality of multiplication circuits and a corresponding subtraction circuit.