Abstract: The invention provides a stepping doser. The doser comprises a bearing component, a dosing catheter, wiring tubes, a threaded rod, a nut, a signal recorder and a connecting rod; wherein the middle socket of the threaded rod is sheathed with a nut, the lower end of the threaded rod contacts the lower inner wall of the bearing component, the upper end of the threaded rod penetrates the upper part of the bearing component, and the upper end of the threaded rod is provided with a driving structure; The bearing component is also provided with a limit stop for limiting the rotation of the nut so that when the threaded rod rotates, the nut can move up and down; when the nut moves up and down, the dosing catheter can move up and down. The dosing catheter can be stepped with this doser, allowing dosing in a larger area.

Abstract: Disclosed in the present invention is a multi-target chimeric antigen receptor. Provided in the present invention is a multi-target chimeric antigen receptor consisting of a main peptide chain and an auxiliary peptide chain; the main peptide chain comprises an antigen binding domain A, an auxiliary peptide chain connecting domain B, a transmembrane domain C and an intracellular signaling domain D; the auxiliary peptide chain comprises a main peptide chain connecting domain F; the antigen binding domain A is a polypeptide having an antigen-binding function; the auxiliary chain connecting domain B and the main peptide connecting domain F are combined with each other; the transmembrane domain C is a transmembrane domain of any membrane-binding protein or a transmembrane protein; and the intracellular signaling domain D comprises a primary signaling region.

Abstract: A method for optimizing CT scanning parameter is disclosed. A target group may be generated from a plurality of reference information samples. Each of the reference information samples may include subject information, information indicating a scanning protocol, one or more scanning parameter values and information indicating reconstructed image quality; the target group can consist of one or more reference information samples with the same subject information and the same scanning protocol. A scanning parameter optimization may be performed according to reconstructed image qualities and scanning parameter values of reference information samples in the target group, so as to acquire a target scanning parameter value of the target group. And according to the target scanning parameter value, a reference X-ray irradiation dose corresponding to the scanning protocol and the subject information of the target group may be determined.

Abstract: An apparatus and a method for making lithium iron phosphate are disclosed. The apparatus comprises a raw material system to provide a raw material mixed solution of raw materials of a hydrothermal reaction or a solvothermal reaction; a tubular reaction device to make the raw material mixed solution in a plug flowing and reacting state to obtain a reacted material; and a kettle reaction device to make the reacted material in a complete mixing and reacting state to obtain a product. The method comprises providing a raw material mixed solution of raw materials of a hydrothermal reaction or a solvothermal reaction; making the raw material mixed solution in a plug flowing and reacting state to obtain a reacted material; and making the reacted material in a complete mixing and reacting state. The lithium iron phosphate can be continuously produced by the apparatus and method.

Abstract: A method for optimizing CT scanning parameter is disclosed. A target group may be generated from a plurality of reference information samples. Each of the reference information samples may include subject information, information indicating a scanning protocol, one or more scanning parameter values and information indicating reconstructed image quality; the target group can consist of one or more reference information samples with the same subject information and the same scanning protocol. A scanning parameter optimization may be performed according to reconstructed image qualities and scanning parameter values of reference information samples in the target group, so as to acquire a target scanning parameter value of the target group. And according to the target scanning parameter value, a reference X-ray irradiation dose corresponding to the scanning protocol and the subject information of the target group may be determined.