Abstract: An example method includes: A domain data orchestration network element receives first requirement information, determines, based on the first requirement information on first data and one or more pieces of domain data service capability information that are in one-to-one correspondence with one or more domain data agent network elements, at least one domain data agent network element of the one or more domain data agent network elements and operation configuration information corresponding to each of the at least one domain data agent network element, and sends the operation configuration information. Wherein, the first requirement information corresponds to at least one of the one or more pieces of domain data service capability information, and the operation configuration information of any one of the at least one domain data agent network element indicates an operation performed by the any one domain data agent network element on the first data.

Abstract: An example method includes: A data orchestration network element receives a first service request message, determines, based on requirement information on a first data and data service capability information having one-to-one correspondence with one or more data agent network elements, at least one data agent network element from the one or more data agent network elements and operation configuration information corresponding to each of the at least one data agent network element, and sends the operation configuration information. The requirement information is determined based on a service requested by the first service request message, the requirement information corresponds to at least one of the one or more pieces of data service capability information, and the operation configuration information of any one of the at least one data agent network element indicates an operation performed by the any one data agent network element on the first data.

Abstract: An example method includes: A first data agent network element obtains first data, receives first indication information and second indication information, where the first indication information includes an indication of an operation performed by the first data agent network element on the first data, the second indication information indicates information about a first network element interacting with the first data agent network element, and the information about the first network element includes address information of the first network element or an identifier of the first network element, or is used to determine the address information that is of the first network element and that is reported by the first data agent network element. The first data agent network element performs the operation on the first data, to obtain first information and sends the first information based on the information about the first network element.

Abstract: A communication method includes: A terminal device determines a first identifier and first domain information, where the first identifier includes an encrypted identifier of the terminal device, and the first domain information indicates a domain in which a network element that manages data information of the terminal device is located. The terminal device sends the first identifier and the first domain information to a first network element. The method may be implemented with an apparatus.

Abstract: A data management method, a system, and a device are provided. An example method includes: A data storage entity receives a data access request and sends an access permission verification request to a distributed ledger node storing a data access policy of the client and/or a data access policy of the user. The distributed ledger node verifies, based on an identifier of a client and/or an identifier of a user in the access permission verification request and a distributed ledger, whether the client has data access permission, and sends a first access permission verification response to the data storage entity if the client has the data access permission, where the first access permission verification response indicates that the client has the data access permission. After receiving the first access permission verification response sent from the distributed ledger node, the data storage entity sends corresponding data to the client.

Abstract: Provided are an imaging method and apparatus for a self-luminous object on a biological sample film; The imaging apparatus and imaging method can effectively and more accurately obtain a higher-definition target image of the self-luminous object; the operation process is simple and the time required for imaging is short; furthermore, the imaging apparatus has the advantages of a small structure, low cost of manufacture, convenient operation, and portability.

Abstract: Systems and method for performing X-ray computed tomography (CT) that can improve spectral separation and decrease motion artifacts without increasing radiation dose are provided. The systems and method can be used with either a kVp-switching source or a single-kVp source. When used with a kVp-switching source, an absorption grating and a filter grating can be disposed between the X-ray source and the sample to be imaged. Relative motion of the filter and absorption gratings can by synchronized to the kVp switching frequency of the X-ray source. When used with a single-kVp source, a combination of absorption and filter gratings can be used and can be driven in an oscillation movement that is optimized for a single-kVp X-ray source. With a single-kVp source, the absorption grating can also be omitted and the filter grating can remain stationary.

Abstract: Provided are an imaging method and apparatus for a self-luminous object on a biological sample film (A); said imaging apparatus comprises a housing (1), a photographic conversion element (2), and an image correction device (3); the inside of the housing (1) forms a darkroom space; the photographic conversion element (2) is arranged in the housing (1); the photographic conversion element (2) is used, when the biological sample film (A) is not inserted, for obtaining a first dark field image inside the housing (1); after affixing the biological sample film (A) to the surface of the photographic conversion element (2), the photographic conversion element (2) is also used for obtaining a second dark field image inside the housing (1); the image correction device (3) is used for correcting the second dark field image according to the first dark field image to obtain a target image corresponding to the self-luminous object.

Abstract: A man-in-the-middle detection method and apparatus. The method includes: A base station receives, in a first physical frame, a RRC message from user equipment UE; the base station receives from the UE a second RRC message including frame information of a second physical frame, and security protection is performed on the first RRC message and the second RRC message by using an access stratum AS security context established by the UE and the base station; and the base station determines whether the first physical frame matches the second physical frame. Thereby, whether a man-in-the-middle exists in air interface communication is determined by determining whether a physical frame in which the UE sends an uplink message matches a physical frame in which the base station receives the uplink message, to prevent the man-in-the-middle from bypassing detection through a mechanism of the man-in-the-middle and improve a man-in-the-middle detection rate.

Abstract: In one embodiment, there is provided a dynamic multi-source image reconstruction apparatus. The apparatus includes a first reconstruction stage, a second reconstruction stage, and a refinement stage. The first reconstruction stage is configured to receive an input data set including a group of data frames. Each data frame corresponds to a respective time step. Each data frame includes a number of projection data sets. Each projection data set corresponds to a respective source-detector pair of a stationary multi-source tomography system. The first reconstruction stage is further configured to reconstruct a first intermediate image based, at least in part, on the group of data frames. The second reconstruction stage is configured to receive a selected data frame and to reconstruct a second intermediate image with a constraint of the first intermediate image as prior. The refinement stage is configured to refine the second intermediate image to produce a three-dimensional output image.

Abstract: Systems and method for performing X-ray computed tomography (CT) that can improve spectral separation and decrease motion artifacts without increasing radiation dose are provided. The systems and method can be used with either a kVp-switching source or a single-kVp source. When used with a kVp-switching source, an absorption grating and a filter grating can be disposed between the X-ray source and the sample to be imaged. Relative motion of the filter and absorption gratings can by synchronized to the kVp switching frequency of the X-ray source. When used with a single-kVp source, a combination of absorption and filter gratings can be used and can be driven in an oscillation movement that is optimized for a single-kVp X-ray source. With a single-kVp source, the absorption grating can also be omitted and the filter grating can remain stationary.

Abstract: Provided are a method and apparatus for imaging a self-luminous object on a biological sample film (A); said imaging apparatus comprises a housing (1), an optical-electrical conversion element (2), and an image correction device (3); the inside of the housing (1) constitutes a darkroom space; the optical-electrical conversion element (2) is arranged in the housing (1); the optical-electrical conversion element (2) is used, when the biological sample film (A) is not inserted, for obtaining a first dark field image inside the housing (1); after affixing the biological sample film (A) to the surface of the optical-electrical conversion element (2), the optical-electrical conversion element (2) is also used for obtaining a second dark field image inside the housing (1); the image correction device (3) is used for correcting the second dark field image according to the first dark field image to obtain a target image corresponding to the self-luminous object.

Abstract: Systems and method for performing X-ray computed tomography (CT) that can improve spectral separation and decrease motion artifacts without increasing radiation dose are provided. The systems and method can be used with either a kVp-switching source or a single-kVp source. When used with a kVp-switching source, an absorption grating and a filter grating can be disposed between the X-ray source and the sample to be imaged. Relative motion of the filter and absorption gratings can by synchronized to the kVp switching frequency of the X-ray source. When used with a single-kVp source, a combination of absorption and filter gratings can be used and can be driven in an oscillation movement that is optimized for a single-kVp X-ray source. With a single-kVp source, the absorption grating can also be omitted and the filter grating can remain stationary.

Abstract: Systems and method for performing X-ray computed tomography (CT) that can improve spectral separation and decrease motion artifacts without increasing radiation dose are provided. The systems and method can be used with either a kVp-switching source or a single-kVp source. When used with a kVp-switching source, an absorption grating and a filter grating can be disposed between the X-ray source and the sample to be imaged. Relative motion of the filter and absorption gratings can by synchronized to the kVp switching frequency of the X-ray source. When used with a single-kVp source, a combination of absorption and filter gratings can be used and can be driven in an oscillation movement that is optimized for a single-kVp X-ray source. With a single-kVp source, the absorption grating can also be omitted and the filter grating can remain stationary.

Abstract: Novel and advantageous systems and method for obtaining and/or reconstructing simultaneous computed tomography (CT)-magnetic resonance imaging (MRI) images are provided. Structural coupling (SC) and compressive sensing (CS) techniques can be combined to unify and improve CT and MRI reconstruction. A bidirectional image estimation method can be used to connect images from different modalities, with CT and MRI data serving as prior knowledge to each other to produce better CT and MRI image quality than would be realized with individual reconstruction.

Abstract: Systems and methods for geometric calibration and image reconstruction in computed tomography (CT) scanning using iterative reconstruction algorithms are provided. An iterative reconstruction algorithm can be used to reconstruct an improved image, and then the improved image can be used to adjust inaccurate parameters by using a Locally Linear Embedding (LLE) method. Adjusted parameters can then be used to reconstruct new images, which can then be used to further adjust the parameters. The steps of this iterative process can be repeated until a quality threshold is met.

Abstract: Novel and advantageous methods and systems for performing spectral computed tomography are provided. An edge-on detector, such as a silicon strip detector, can be used to receive X-rays after passing through a sample to be imaged. An energy resolving process can be performed on the collected X-ray radiation. The CT scanner can have third-generation or fourth-generation geometry.