Abstract: The present disclosure discloses a sample preliminary screening chip, a specimen detecting method and a screening device. A data processor may be configured to control a sample solution containing a specimen to be added into a preliminary screening inlet of the sample preliminary screening chip, and control the sample solution in the preliminary screening inlet to enter a channel, successively to flow through a first preliminary screening area and a second preliminary screening area, and to flow out from a preliminary screening outlet so as to store a liquid with the specimen in a first preliminary screening area. In this way, the liquid containing the specimen may be screened preliminarily.

Abstract: The present application discloses a measurement unit for holding a sample (including a powder sample in small quantity, a scattered powder sample or an aqueous solution sample) for a terahertz beam irradiation; and a terahertz spectroscopy system with the measurement unit for measuring an absorption signal from the sample. In particular, the terahertz beam can be reflected for multiple times through the sample in the measurement unit for enhancing the absorption signal. The present application discloses three non-destructive e methods of measuring the absorption signal of the sample using the terahertz. spectroscopy system.

Abstract: The present invention discloses a method and its application for inducing iPSC differentiation to obtain CD34+cells and NK cells. The method utilizes the three-dimensional structure of the embryoid bodies to provide a favorable differentiation microenvironment for iPSC differentiation, and can start producing a high proportion of CD34+cells on the 4th day under hypoxic induction culture conditions. Subsequently, the production of iPSC induced NK cell differentiation is significantly increased by adhering to the embryoid bodies wall or digesting and resuspension induction, And the induced differentiation of NK cells can exert a killing effect on tumor cells in a short period of time, with strong tumor killing ability, suitable for the production and clinical application of large-scale cell preparations.

Abstract: A floating structure and basic module of a floating structure are presented. The floating structure includes multiple lower floating bodies, an upper structure, and intermediate connection structures. The multiple lower floating bodies include multiple distributed elongated floating bodies. The floating bodies are spaced from each other by a certain distance. The sum of the displacement volumes of the floating bodies is greater than the displacement volume when the floating structure as a whole is fully loaded. The intermediate connection structures include at least multiple connection structures in a first direction, the first direction intersecting the horizontal plane. A connection structure in the first direction corresponds to a single elongated floating body connected to three or more spaced structures. The cross-section width of each intermediate connection structure in the horizontal direction is less than the width of the corresponding elongated floating body.

Abstract: A highly safe large floating structure, and a basic module of a very large floating structure, includes multiple lower floating bodies, an upper structure, and intermediate connection structures. The multiple lower floating bodies include multiple distributed strip-shaped floating bodies. The floating bodies are spaced from each other by a certain distance. The sum of the displacement volumes of the floating bodies is greater than the displacement volume when the floating structure as a whole is fully loaded. The intermediate connection structures include at least multiple connection structures in a first direction, the first direction intersecting the horizontal plane. A connection structure in the first direction corresponds to a single strip-shaped floating body connected to three or more spaced structures. The cross-section width of each intermediate connection structure in the horizontal direction is less than the width of the corresponding strip-shaped floating body.

Abstract: A head-up display with variable focal length includes a projector which provides a beam with image, a magnifier lens module which is disposed on the route of the beam, and an array of lens which is movably disposed between the projector and the magnifier lens module. The beam forms an inter-image after passing the array of lens, then forms a virtual image after passing the magnifier lens module. To change the position of the virtual image, adjust the relative position between the array of lens and the magnifier lens module. A dispersion angle of the array of lens is ?d, a magnification of the magnifier lens module is M, a distance between the virtual image and user's eyes is VID, a visible range of user's eyes is Et, and satisfies the relationship as following: ?d=M*2*cot?1 (2VID/Et).

Abstract: A head-up display with variable focal length includes a projector which provides a beam with image, a magnifier lens module which is disposed on the route of the beam, and an array of lens which is movably disposed between the projector and the magnifier lens module. The beam forms an inter-image after passing the array of lens, then forms a virtual image after passing the magnifier lens module. To change the position of the virtual image, adjust the relative position between the array of lens and the magnifier lens module. A dispersion angle of the array of lens is ?d, a magnification of the magnifier lens module is M, a distance between the virtual image and user's eyes is VID, a visible range of user's eyes is Et, and satisfies the relationship as following: ?d=M*2*cot?1 (2VID/Et).