Abstract: The present invention discloses a preparation process of multi-component spherical alloy powder, which adopts a plasma rotation electrode process (PREP) method to prepare the multi-component spherical alloy powder. The multi-component alloy includes at least one of refractory metals and compounds thereof, specifically including tungsten, molybdenum, tantalum, niobium, rhenium, tungsten carbide, tantalum carbide and the like.

Abstract: A concrete mixture is provided. The mixture includes cement powder, a plant biomaterial in a solid form, wherein the plant biomaterial does not comprise ash, and concrete aggregate, wherein a ratio of cement powder to the biomaterial ranges from 10:1 to 100:1. Methods of controlling concrete setting by adding a plant biomaterial in a solid form to a concrete mixture are also provided.

Abstract: A concrete mixture is provided. The mixture includes cement powder, a plant biomaterial in a solid form, wherein the plant biomaterial does not comprise ash, and concrete aggregate, wherein a ratio of cement powder to the biomaterial ranges from 10:1 to 100:1. Methods of controlling concrete setting by adding a plant biomaterial in a solid form to a concrete mixture are also provided.

Abstract: Disclosed herein are methods for reducing beam-hardening artifacts in CT imaging using a mapping operator that comprises a hybrid spectral model that incorporates air scan X-ray intensity data acquired at two different effective mean energies. In one variation, the air scan X-ray intensity data acquired during a calibration session is combined with an ideal spectral model for each X-ray detector to derive the hybrid spectral mode. A mapping operator based on the hybrid spectral model is used to correct beam-hardening artifacts in the acquired CT projection data. In some variations, the mapping operator is a lookup table of monochromatic (corrected) projection values, and the acquired CT projection data is used to calculate the index of the lookup table entry that contains the corrected projection value that corresponds with the acquired CT projection data.

Abstract: A method is provided for processing a dual-energy CT scan image, which includes filtering the pixels in a dual-energy CT scan image to obtain pixels to be grouped; grouping the pixels to be grouped into a plurality of pixel groups based on the positions of the pixels to be grouped in the dual-energy CT scan image; performing material decomposition on the pixels in each pixel group; and determining the object corresponding to each pixel group based on the results of material decomposition. By using the method, the scan time and the X-ray dose radiated to a target (e.g., a user to be diagnosed) are reduced.

Abstract: A system of medical imaging including a marking module, a classifying module, a region-of-interest determining module, a curve acquiring module and a delay calculating module. The marking module is used for marking one or more feature regions from pre-scanned images; the classifying module is used for classifying the feature regions by using a classification algorithm model; the region-of-interest determining module is used for selecting a feature region of the same type as a specific diagnostic tissue as a region of interest; the curve acquiring module is used for acquiring a curve of CT values of the region of interest in function of time, based on a relationship between the CT values and scanning time points; the delay calculating module is used for detecting a peak value of the curve and calculating a scan delay time based on a time point corresponding to the peak value.

Abstract: The present invention relates to a method for identifying calcification portions in a dual energy CT contrast agent enhanced scanning image, the method including: filtering the pixels in the dual energy CT contrast agent enhanced scanning image to acquire pixels to be grouped; grouping the pixels to be grouped in a plurality of pixel groups according to the positions of the pixels to be grouped in the dual energy CT contrast agent enhanced scanning image; material-decomposing the pixels in each pixel group; and determining the pixels corresponding to the calcification portions in the plurality of pixel groups according to the result of the material-decomposing. Therefore, the calcification portions can be identified accurately.

Abstract: Embodiments of the present invention disclose a mounting structure for display device. The mounting structure comprises at least two mounting assemblies, and each mounting assembly comprises: a first component mounted securely to the display device; a second component mounted to a beam; and a first screw rod mounted horizontally to the first component, the first screw rod being configured to be rotatable but non-displaceable relative to the first component. The second component is configured to be mounted to the first screw rod in a non-rotatable manner. Embodiments of the present invention further disclose a wall-mounted display device comprising a display device and the mounting structure.

Abstract: The present invention provides a display device, including a display panel and a supporting frame arranged around the display panel, wherein at least one spacer structure is arranged between the display panel and the supporting frame, and wherein the spacer structure is fixedly mounted on the supporting frame and includes a first spacer part and a second spacer part, the first spacer part is arranged between the bottom surface of the display panel and the supporting frame, and the second spacer part is arranged between the lateral surface of the display panel and the supporting frame. Compared with the prior art, the present invention has the advantages that the impact from multiple directions to the display panel may be reduced, the probable damage to the display panel is reduced, and the quality of a product is improved.

Abstract: Embodiments of the present invention disclose a mounting structure for display device. The mounting structure comprises at least two mounting assemblies, and each mounting assembly comprises: a first component mounted securely to the display device; a second component mounted to a beam; and a first screw rod mounted horizontally to the first component, the first screw rod being configured to be rotatable but non-displaceable relative to the first component. The second component is configured to be mounted to the first screw rod in a non-rotatable manner. Embodiments of the present invention further disclose a wall-mounted display device comprising a display device and the mounting structure.

Abstract: The present invention provides a display device, including a display panel and a supporting frame arranged around the display panel, wherein at least one spacer structure is arranged between the display panel and the supporting frame, and wherein the spacer structure is fixedly mounted on the supporting frame and includes a first spacer part and a second spacer part, the first spacer part is arranged between the bottom surface of the display panel and the supporting frame, and the second spacer part is arranged between the lateral surface of the display panel and the supporting frame. Compared with the prior art, the present invention has the advantages that the impact from multiple directions to the display panel may be reduced, the probable damage to the display panel is reduced, and the quality of a product is improved.

Abstract: A system of medical imaging including a marking module, a classifying module, a region-of-interest determining module, a curve acquiring module and a delay calculating module. The marking module is used for marking one or more feature regions from pre-scanned images; the classifying module is used for classifying the feature regions by using a classification algorithm model; the region-of-interest determining module is used for selecting a feature region of the same type as a specific diagnostic tissue as a region of interest; the curve acquiring module is used for acquiring a curve of CT values of the region of interest in function of time, based on a relationship between the CT values and scanning time points; the delay calculating module is used for detecting a peak value of the curve and calculating a scan delay time based on a time point corresponding to the peak value.

Abstract: The present invention relates to a method for identifying calcification portions in a dual energy CT contrast agent enhanced scanning image, the method including: filtering the pixels in the dual energy CT contrast agent enhanced scanning image to acquire pixels to be grouped; grouping the pixels to be grouped in a plurality of pixel groups according to the positions of the pixels to be grouped in the dual energy CT contrast agent enhanced scanning image; material-decomposing the pixels in each pixel group; and determining the pixels corresponding to the calcification portions in the plurality of pixel groups according to the result of the material-decomposing. Therefore, the calcification portions can be identified accurately.

Abstract: A method is provided for processing a dual-energy CT scan image, which includes filtering the pixels in a dual-energy CT scan image to obtain pixels to be grouped; grouping the pixels to be grouped into a plurality of pixel groups based on the positions of the pixels to be grouped in the dual-energy CT scan image; performing material decomposition on the pixels in each pixel group; and determining the object corresponding to each pixel group based on the results of material decomposition. By using the method, the scan time and the X-ray dose radiated to a target (e.g., a user to be diagnosed) are reduced.

Abstract: A method for image reconstruction using projection data obtained by an asymmetric detector includes dividing the projection data into Regions 1, 2, 3, 4, and 5. Region 1 is an asymmetric region having detecting channels but no detecting channels symmetrical about a central channel. Region 2 is a transition region having detecting channels and there are detecting channels symmetrical about the central channel. Region 3 is a symmetric region having detecting channels and there are detecting channels symmetrical about the central channel. Region 4 is a transition region having detecting channels and there are detecting channels symmetrical about the central channel. Region 5 is a truncated region where there is no detecting channel. The method includes performing a view angle weighting on projection data in each of the five regions, and reconstructing a tomographic image of an irradiated subject from the weighted projection data.

Abstract: A method for image reconstruction using projection data obtained by an asymmetric detector includes dividing the projection data into Regions 1, 2, 3, 4, and 5. Region 1 is an asymmetric region having detecting channels but no detecting channels symmetrical about a central channel. Region 2 is a transition region having detecting channels and there are detecting channels symmetrical about the central channel. Region 3 is a symmetric region having detecting channels and there are detecting channels symmetrical about the central channel. Region 4 is a transition region having detecting channels and there are detecting channels symmetrical about the central channel. Region 5 is a truncated region where there is no detecting channel. The method includes performing a view angle weighting on projection data in each of the five regions, and reconstructing a tomographic image of an irradiated subject from the weighted projection data.