Abstract: A flat panel detector and an imaging system are provided. The flat panel detector includes a plurality of pixel units which include photosensitive pixel units and alignment pixel units. Each photosensitive pixel unit includes a photoelectric sensor configured to convert an incident light into an electrical signal so that a photosensitive pixel unit in which the photoelectric sensor is located has a grayscale that changes according to a real-time change of the incident light. Each alignment pixel unit is configured to have a fixed grayscale, and the fixed grayscale does not change according to the real-time change of the incident light. The alignment pixel units includes first alignment pixel units and second alignment pixel units. Each first alignment pixel unit has a first fixed grayscale, each second alignment pixel unit has a second fixed grayscale different from the first fixed grayscale.

Abstract: A device for visible puncture includes a balloon, a canula, a needle tube, an image acquisition device, and a fluid injection tube. The balloon includes a first end including a first hole, and a second end including a second hole. The canula includes a first axial through hole. The needle tube includes a second axial through hole and is disposed in the first axial through hole. The image acquisition device is disposed in the second axial through hole. The balloon is axially disposed on the canula. The first end of the balloon is disposed on the outer wall of the front end of the needle tube, and the second end of the balloon is disposed on the outer wall of the front end of the canula. The second axial through hole includes a fluid channel disposed between the outer wall of the needle tube and the canula.

Abstract: The present disclosure discloses a flat panel detector, a driving method thereof and a detection device. The flat panel detector includes: at least one stage of first demultiplexer, wherein signal output terminals of a first stage of first demultiplexer are connected with the scanning signal lines in one-to-one correspondence, signal output terminals of other stage of first demultiplexer serves as signal input terminals of the previous stage of first demultiplexer, the first demultiplexers are configured to provide signals of the signal input terminals to all the signal output terminals in time division, the signal input terminals and the signal output terminals included in the different stages of first demultiplexers differ from one another, and the quantity of the signal input terminals and the quantity of the signal output terminals are reduced stage by stage from the first stage of first demultiplexer to the last stage of first demultiplexer.

Abstract: Provided are transaminase mutants and uses thereof. The transaminase mutant is obtained by one or more amino acid mutations occurring in SEQ ID NO: 2 or is a mutant with a conserved amino acid mutation obtained by taking the sequence SEQ ID NO: 1 of a wild-type CvTA transaminase as a reference. Compared with wild-type transaminases, the catalytic activity of the mutant is improved to different degrees, so that the production efficiency of chiral amine compound synthesis may be improved.

Abstract: Provided are an amino acid dehydrogenase mutant and use thereof. The amino acid sequence of the amino acid dehydrogenase mutant has a sequence as shown in SEQ ID NO: 1, and sites at which amino acid mutations occur include a K144G site.

Abstract: An electrochemical device including an electrode assembly including a first section, a first bend section, a second section, and a second bend section connected in sequence along a winding direction. A first bonding piece includes a first body portion disposed on the first bend section and a first extension portion disposed on the first section. The first body portion is configured to bond the first bend section to the housing. A second bonding piece includes a second body portion disposed on the second bend section and a second extension portion disposed on the first section. The second body portion is configured to bond the second bend section to the housing. A third bonding piece is disposed between the electrode assembly and the housing. The third bonding piece is bonded to the housing, the first extension portion, and the second extension portion.

Abstract: An electrochemical apparatus includes an electrode assembly, a first adhesive member, and a second adhesive member. The electrode assembly includes electrode plates and a separator, the electrode plates and the separator are stacked sequentially and wound to form the electrode assembly, the electrode plate includes a current collector, and the electrode assembly includes a first straight section and a first bending section. Along a winding direction, a terminating end of the separator exceeds a terminating end of the current collector by 1 to 5 turns, the first adhesive member is disposed on an outer surface of the first straight section, and the second adhesive member is disposed on an outer surface of the first bending section or an outer surface of the outermost current collector at the first bending section.

Abstract: A battery cell includes an electrode assembly and a packaging bag for accommodating the electrode assembly, where the battery cell further includes a first adhesive layer and a second adhesive layer, and the first adhesive layer is adhered to a side of the electrode assembly; and the second adhesive layer is disposed on an outermost surface of the electrode assembly to bond the packaging bag and the electrode assembly, and the first adhesive layer is disposed between the electrode assembly and the second adhesive layer. A battery is further provided, including a housing and the foregoing battery cell, where the battery cell is accommodated in the housing.

Abstract: A battery cell includes an electrode assembly and a packaging bag for accommodating the electrode assembly and a first adhesive layer and a second adhesive layer. One end of the first adhesive layer and one end of the second adhesive layer are both adhered to the first surface of the electrode assembly, and the other end of the first adhesive layer and the other end of the second adhesive layer both extend to the bottom of the electrode assembly and are adhered to a second surface opposite the first surface, a surface on which a terminating end of the electrode assembly is defined as the first surface; and a third adhesive layer, one end of the third adhesive layer is adhered to the first adhesive layer, and the other end of the third adhesive layer is adhered to the second adhesive layer.

Abstract: An electrode assembly includes a first electrode plate. The first electrode plate includes a first current collector, a first active material layer and a first insulation layer. The first current collector includes a first surface and a second surface. The first surface and the second surface are provided opposite to each other. The first active material layer is provided on the first surface. The first insulation layer is located between the first current collector and the first active material layer.

Abstract: An electrochemical device includes an electrode assembly. The electrode assembly includes a first electrode plate. The first electrode plate includes a first current collector, a first active material layer, and a first insulation layer. The first current collector includes a first surface and a second surface. The first surface and the second surface are provided opposite to each other. The first active material layer is provided on the first surface. The first insulation layer is provided between the first current collector and the first active material layer.

Abstract: A cell includes an electrode assembly, a housing, tabs, a first sealant, and a second sealant. The housing includes a housing body and a sealing portion connected to the housing body. The sealing portion is disposed between the first side surface and the second side surface. The tabs protrude from the sealing portion and include a first tab and a second tab. The first sealant is used to sealably connect the first tab and the sealing portion. The second sealant is used to sealably connect the second tab and the sealing portion. The sealing portion between the first sealant and the first side surface is a first sealing portion, and the sealing portion between the first sealant and the second sealant is a second sealing portion. In a length direction of the housing, a width of the first sealing portion is greater than a width of the second sealing portion.

Abstract: An electrochemical device includes a housing and an electrode assembly configured to be a wound structure and disposed in the housing. The electrode assembly includes a first electrode plate including a first current collector and a first active material layer disposed thereon, a second electrode plate including a second current collector and a second active material layer disposed thereon, and a separator disposed between the first electrode plate and the second electrode plate. In a winding direction, the electrode assembly includes a first section, a first bend section, a second section, and a second bend section connected sequentially. In a thickness direction of the electrode assembly, the first section includes a first part, and the second section includes a second part. An outermost coil of the first part is the separator, and an outermost coil of the second part is the first electrode plate.

Abstract: The present application discloses a method for recognizing a picture, device, and apparatus. The method comprises: acquiring a to-be-recognized picture from an Internet-based on-line database; extracting characteristics from the to-be-recognized picture and a previously acquired copy-righted picture, to obtain the characteristics of the to-be-recognized picture and the copy-righted picture; comparing the extracted characteristics of the to-be-recognized picture and the copy-righted picture; and determining the to-be-recognized pictures as a suspected pirated picture based on the comparison result. According to the technical solutions provided by the embodiments of the present application, suspected pirated pictures can be accurately and quickly recognized, with no need of manual screening, thereby greatly reducing the labor cost, and increasing the recognition efficiency for suspected pirated pictures.

Abstract: The present application discloses a method for recognizing a picture, device, and apparatus. The method comprises: acquiring a to-be-recognized picture from an Internet-based on-line database; extracting characteristics from the to-be-recognized picture and a previously acquired copy-righted picture, to obtain the characteristics of the to-be-recognized picture and the copy-righted picture; comparing the extracted characteristics of the to-be-recognized picture and the copy-righted picture; and determining the to-be-recognized pictures as a suspected pirated picture based on the comparison result. According to the technical solutions provided by the embodiments of the present application, suspected pirated pictures can be accurately and quickly recognized, with no need of manual screening, thereby greatly reducing the labor cost, and increasing the recognition efficiency for suspected pirated pictures.