Abstract: A skin layer of a superconducting tape has a woven mesh structure and is disposed on a surface of a superconducting tape. The skin layer of a superconducting tape solves the problem where a vapor layer generated when a superconductor is in a normal resistive state greatly reduces the efficiency of a heat exchange between the superconductor and liquid nitrogen. Further provided are the superconducting tape and a superconducting coil.

Abstract: A waveguide display device and an augmented reality display apparatus are provided. The waveguide display device includes a waveguide substrate and a first optical element, a second optical element and a third optical element coupled to the waveguide substrate. The first optical element is configured to couple an incident light out to the waveguide substrate. The second optical element is configured to couple the light coupled-in by the waveguide substrate out to the third optical element in a first direction and a second direction. The third optical element is configured to couple the light coupled-in by the second optical element out to the second optical element in the first direction or the second direction, and to couple to the light coupled-in by the second optical element out to the human eye.

Abstract: Provided is a superconducting coil having a spiral structure for a current limiter. The coil includes: a first superconducting tape, a second superconducting tape, and an insulating isolation layer, where the first superconducting tape and the second superconducting tape have spiral structures, an end of the first superconducting tape at a spiral center is connected to an end of the second superconducting tape at the spiral center, the instating isolation laser is filled between the first superconducting tape and the second superconducting tape, and a spacing between the first superconducting tape and the second superconducting tape gradually increases from the spiral center to an outer spiral periphery.

Abstract: A diffractive image combiner is provided, to increase an exit pupil dimension, thereby improving user experience. The diffractive image combiner includes a first diffractive optical element DOE and a second diffractive optical element DOE. The first diffractive optical element DOE is parallel to the second diffractive optical element DOE. A grating vector of a first incidence point in the first diffractive optical element DOE is the same as a grating vector of a second incidence point in the second diffractive optical element DOE. The first incidence point is used to convert an incident light ray that meets a Bragg condition into a first diffracted light ray and a first transmitted light ray. The first transmitted light ray is incident to the second incidence point. The second incidence point is used to convert the first transmitted light ray into a second diffracted light ray.

Abstract: Provided is a superconducting tape testing device, including lead contacts and a support plate. Each lead contact a conductive contact and a magnet; the magnet is provided with a through hole through which the conductive contact passes, the support plate comprises a plate and a magnetic conductive member; and the magnetic conductive member is fixed on the surface of the plate body.

Abstract: Provided are a method and apparatus for calculating fault resistance and a current-limiting current of a superconducting fault current limiter.

Abstract: Provided is a superconducting coil having a spiral structure for a current limiter. The coil includes: a first superconducting tape, a second superconducting tape, and an insulating isolation layer, where the first superconducting tape and the second superconducting tape have spiral structures, an end of the first superconducting tape at a spiral center is connected to an end of the second superconducting tape at the spiral center, the instating isolation laser is filled between the first superconducting tape and the second superconducting tape, and a spacing between the first superconducting tape and the second superconducting tape gradually increases from the spiral center to an outer spiral periphery.

Abstract: A skin layer of a superconducting tape has a woven mesh structure and is disposed on a surface of a superconducting tape. The skin layer of a superconducting tape solves the problem where a vapor layer generated when a superconductor is in a normal resistive state greatly reduces the efficiency of a heat exchange between the superconductor and liquid nitrogen. Further provided are the superconducting tape and a superconducting coil.

Abstract: Provided are a method and apparatus for calculating fault resistance and a current-limiting current of a superconducting fault current limiter.

Abstract: Provided is a superconducting tape testing device, including lead contacts and a support plate. Each lead contact a conductive contact and a magnet; the magnet is provided with a through hole through which the conductive contact passes, the support plate comprises a plate and a magnetic conductive member; and the magnetic conductive member is fixed on the surface of the plate body.

Abstract: The present invention relates to a large-size bionic holographic three-dimensional dynamic display method with large field of view. The method includes: a computer generated hologram (CGH) is loaded on a spatial light modulator; a large field angle is formed by changing the optical path through a microlens array or a diffractive optical element having same optical property with the microlens array disposed on a light-emitting surface of pixel structure of the spatial light modulator. Each microlens of the microlens array has one-to-one correspondence with each pixel of the pixel structure of the spatial light modulator. The cost is saved and design of the system structure is simplified while field view of the three-dimensional holographic display is expanded and large size is reappeared. The pixels in the spatial light modulator are fully utilized to avoid loss of resolution, and the display precision is provided to meet the growing demand of people.

Abstract: The present invention relates to a large-size bionic holographic three-dimensional dynamic display method with large field of view. The method includes: a computer generated hologram (CGH) is loaded on a spatial light modulator; a large field angle is formed by changing the optical path through a microlens array or a diffractive optical element having same optical property with the microlens array disposed on a light-emitting surface of pixel structure of the spatial light modulator. Each microlens of the microlens array has one-to-one correspondence with each pixel of the pixel structure of the spatial light modulator. The cost is saved and design of the system structure is simplified while field view of the three-dimensional holographic display is expanded and large size is reappeared. The pixels in the spatial light modulator are fully utilized to avoid loss of resolution, and the display precision is provided to meet the growing demand of people.

Abstract: Disclosed is an image reconstruction method in a high-energy dual-energy CT system. The method comprises steps of scanning an objection with high-energy dual-energy rays to obtain high-energy dual-energy projection values, calculating projection values of base material coefficients corresponding to the dual-energy projection values on the basis of a pre-created lookup table or by analytically solving a set of equations, and obtaining an image of base material coefficient distribution based on the projection values of base material coefficients. The method provides a solution for reconstruction with high-energy dual energy CT technology and thus a more effective approach for substance identification and contraband inspection, thereby bringing a significant improvement on accuracy and efficiency in security inspection.

Abstract: A device for inspecting contraband in an aviation cargo container includes: a turntable and a scanning system, the scanning system including a radiation source; a detector; a radiation source mounting structure; and a detector mounting structure for mounting the detector. Each of said radiation source mounting structure and said detector mounting structure includes at least one column assembly. The radiation source and the detector are mounted on the column assembly and allowed to synchronously ascend and descend along said column assembly. By combining different movement modes of the turntable and the scanning system, the device of the present invention can scan the object in various scanning modes. The device is stable in structure, convenient in installation, and occupies a small space. The device can inspect aviation containers over two meters long and/or over two meters wide and achieve a relatively high passing rate of the objects.

Abstract: A device for inspecting contraband in an aviation cargo containers includes: a turntable located at an object inspecting position and configured to carry the object to be inspected and bring the object into rotation; an object conveying system; a scanning system including a radiation source and a detector which can synchronously move in the vertical direction; a turntable drive/control system which drives and controls rotation of said turntable so that the turntable can continuously rotate about its rotation axis or rotate to any predetermined angular position; a scanning drive/control system which drives and controls the radiation source and the detector into synchronous movement in the vertical direction so that the radiation source and the detector can continuously move in the vertical direction or move to any predetermined vertical position. The device of the present invention can scan the object and form images in various scanning modes to meet different needs.

Abstract: Disclosed is an image reconstruction method in a high-energy dual-energy CT system. The method comprises steps of scanning an objection with high-energy dual-energy rays to obtain high-energy dual-energy projection values, calculating projection values of base material coefficients corresponding to the dual-energy projection values on the basis of a pre-created lookup table or by analytically solving a set of equations, and obtaining an image of base material coefficient distribution based on the projection values of base material coefficients. The method provides a solution for reconstruction with high-energy dual energy CT technology and thus a more effective approach for substance identification and contraband inspection, thereby bringing a significant improvement on accuracy and efficiency in security inspection.

Abstract: A multiple-view-angle cargo security inspection method for inspecting an object using a cargo security inspection system, the cargo security inspection system including a radiation source for generating a beam of rays for transmitting through the object to be inspected and a data collecting unit for collecting the transmission projection data after the beam of rays has transmitted through the inspected object, the method including a scanning step including: rotating the radiation source and/or the object about a rotation axis so as to achieve a relative rotation, thereby positioning the radiation source in a plurality of discrete positions with different view angles with respect to the inspected object, wherein, in each view angle, the radiation source moves along a straight line in a direction parallel to the rotation axis and at the same time scans the inspected object so as to acquire the transmission projection data at each view angle.

Abstract: A device for inspecting contraband in an aviation cargo container includes: a turntable and a scanning system, the scanning system including a radiation source; a detector; a radiation source mounting structure; and a detector mounting structure for mounting the detector. Each of said radiation source mounting structure and said detector mounting structure includes at least one column assembly. The radiation source and the detector are mounted on the column assembly and allowed to synchronously ascend and descend along said column assembly. By combining different movement modes of the turntable and the scanning system, the device of the present invention can scan the object in various scanning modes. The device is stable in structure, convenient in installation, and occupies a small space. The device can inspect aviation containers over two meters long and/or over two meters wide and achieve a relatively high passing rate of the objects.

Abstract: A device for inspecting contraband in an aviation cargo containers includes: a turntable located at an object inspecting position and configured to carry the object to be inspected and bring the object into rotation; an object conveying system; a scanning system including a radiation source and a detector which can synchronously move in the vertical direction; a turntable drive/control system which drives and controls rotation of said turntable so that the turntable can continuously rotate about its rotation axis or rotate to any predetermined angular position; a scanning drive/control system which drives and controls the radiation source and the detector into synchronous movement in the vertical direction so that the radiation source and the detector can continuously move in the vertical direction or move to any predetermined vertical position. The device of the present invention can scan the object and form images in various scanning modes to meet different needs.

Abstract: A multiple-view-angle cargo security inspection method for inspecting an object using a cargo security inspection system, the cargo security inspection system including a radiation source for generating a beam of rays for transmitting through the object to be inspected and a data collecting unit for collecting the transmission projection data after the beam of rays has transmitted through the inspected object, the method including a scanning step including: rotating the radiation source and/or the object about a rotation axis so as to achieve a relative rotation, thereby positioning the radiation source in a plurality of discrete positions with different view angles with respect to the inspected object, wherein, in each view angle, the radiation source moves along a straight line in a direction parallel to the rotation axis and at the same time scans the inspected object so as to acquire the transmission projection data at each view angle.