Abstract: Provided is a method for identifying and positioning partial discharge of a high-voltage cable, which includes: collecting a partial discharge pulse signal; performing noise reduction processing on the partial discharge pulse signal to obtain a denoised partial discharge characteristic signal; inputting the denoised partial discharge characteristic signal into a pre-trained lightweight residual attention network to output a discharge type discrimination result, a discharge intensity, and characteristic parameters; and using, based on the discharge type discrimination result, the discharge intensity, and the characteristic parameters, a self-correcting dual-end localization algorithm to position a discharge source, including: measuring a time difference of arrival of the partial discharge pulse signal at the two ends of the high-voltage cable, and calculating, based on the time difference, the discharge type discrimination result, the discharge intensity, the characteristic parameters, and a length parameter o

Abstract: The present disclosure provides an intracranial artery stenosis detection method and system. The present disclosure obtains artery stenosis detection results based on a first maximum intensity projection (MIP) image and a second MIP image obtained by preprocessing a medical image by adopting a detection model based on an adaptive triplet attention module and generates an auxiliary report and visualization results according to target category information in the artery stenosis detection results. Therefore, the problem that existing manual interpretation methods are easily affected by the subjective experience of doctors and are time-consuming and laborious can be solved, thus improving accuracy and efficiency of intracranial artery stenosis detection.

Abstract: This application relates to the technical field of image recognition, and provides a method for evaluating a diffusion weighted imaging (DWI)-fluid attenuated inversion recovery (FLAIR) mismatch, an apparatus, a medium, and a product. The method includes: obtaining a DWI image and a FLAIR image of a target object; applying a first image segmentation model to segment the DWI image to obtain a first image segmentation result; applying a second image segmentation model to segment the FLAIR image to obtain a second image segmentation result; registering the second image segmentation result onto the first image segmentation result to obtain a registered second image segmentation result; and applying a Dice metric to evaluate a degree of mismatch between the first image segmentation result and the registered second image segmentation result. This application can improve efficiency of determining whether DWI and FLAIR are matched.

Abstract: The invention relates to the field of biomedical engineering, and discloses a hemostatic agent for jaw central hemangioma hemorrhage and a preparation method and application thereof. The invention is as follows: chitosan powder and organic weak acid are added into organic alcohol to react, so as to prepare chitosan weak acid salt, and then the chitosan weak acid salt is mixed with carboxymethyl chitosan in proportion to obtain the hemostatic agent of the invention. The hemostatic agent of the invention has good fluidity and plasticity. When applied to the hemostasis of jaw central hemangioma hemorrhage, the hemostatic agent of the invention can quickly reach the point of jaw central hemangioma hemorrhage without any stimulation and damage to the tissue. In addition, the hemostatic agent of the invention can inhibit the growth of bacteria, eliminate cross infection, and is easy to clean and remove.

Abstract: A low field magnetic resonance imaging (MRI) stroke identification sequence uses an inversion recovery sequence. TE is set to the minimum or near-minimum value achievable by a system to minimize an impact of T2 effect on a signal S. Additionally, it selects combinations of TR values and corresponding TI values to make signal from cerebral hemorrhage appear as high signal, and signals from cerebral infarct tissue and cerebral parenchyma appear as isointense or low signal. This allows for rapid and accurate determination of hemorrhagic stroke and, by utilizing low-field magnetic resonance, enhances the accessibility for patients.

Abstract: This application relates to the technical field of image recognition, and provides a method for evaluating a diffusion weighted imaging (DWI)-fluid attenuated inversion recovery (FLAIR) mismatch, an apparatus, a medium, and a product. The method includes: obtaining a DWI image and a FLAIR image of a target object; applying a first image segmentation model to segment the DWI image to obtain a first image segmentation result; applying a second image segmentation model to segment the FLAIR image to obtain a second image segmentation result; registering the second image segmentation result onto the first image segmentation result to obtain a registered second image segmentation result; and applying a Dice metric to evaluate a degree of mismatch between the first image segmentation result and the registered second image segmentation result. This application can improve efficiency of determining whether DWI and FLAIR are matched.

Abstract: Provided is a method for preparing a skull flap by photo-curing 3D (three dimensions) printing, including the following steps: (1) constructing a 3D printing model: generating a corresponding 3D model based on a cranial scan data of a patient; (2) preparing a 3D printing ink: weighing a photo-crosslinking hydrogel, mixing the photo-crosslinking hydrogel and a nanoclay solution to obtain a mixed system, and then adding a photoinitiator and a photoresist into the mixed system to obtain the 3D printing ink; and (3) conducting photo-curing 3D printing: subjecting the 3D printing ink to ultrasonic mixing, then filling into an ink tank of a photo-curing 3D printer, transferring the corresponding 3D model into the photo-curing 3D printer, and subjecting the corresponding 3D model to printing to obtain the skull flap; wherein the nanoclay solution comprises an extracellular matrix component.

Abstract: Provided is a three dimensional (3D) printing photo-curing composition suitable for skull repair. The 3D printing photo-curing composition suitable for skull repair includes the following components: nanoclay; a photo-crosslinking hydrogel; at least one photoinitiator; and at least one photoresist.

Abstract: A method and system for extracting a multi-dimensional disconnection network region of symptom mapping: registering a lesion image to a brain standard space; obtaining diffusion magnetic resonance images and resting-state functional magnetic resonance images of healthy control groups; constructing a structural disconnection weighting network corresponding to lesions using a fiber tracking method according to the lesion image in the brain standard space and the diffusion magnetic resonance images; constructing a functional significant disconnection network corresponding to the lesions using a cross-correlation verification method according to the lesion image in the brain standard space and the resting-state functional magnetic resonance images; and determining the multi-dimensional disconnection network region of the lesions of symptom mapping according to the structural disconnection weighting network and the functional significant disconnection network, where the multi-dimensional disconnection network regi

Abstract: A method and system for processing an intracranial large vessel image, an electronic device, and a medium are provided.

Abstract: The present invention discloses a xylose hydrolysate decolorization and filtration device. A hydrolysate is filtered through a to-be-cleaned filtering machine to form a waste carbon liquid with a light transmittance of 7% to 10%, the waste carbon liquid is subjected to pressure filtration through a filter press to form a plate and frame liquid, the plate and frame liquid is filtered through a to-be-passed-through filtering machine to form a pre-decolorized liquid with a light transmittance of 30% to 35%, the pre-decolorized liquid enters a decolorization tank and is mixed with added new carbon in the decolorization tank to form a new carbon liquid, and the new carbon liquid is filtered through a standby filtering machine to form a decolorized liquid with a light transmittance of greater than 65%. The present invention further discloses a xylose hydrolysate decolorization and filtration method using the device.

Abstract: A regionally integrated emergency stroke unit includes an information interaction area, an imaging examination area, and a thrombolytic therapy area. A doctor workstation, a comprehensive information surveillance monitor, and a process support artificial intelligence (AI) assistant are set in the information interaction area. A test device, a first television display, a movable low-field magnetic resonance imager, and an AI-assisted decision-making system are set in the imaging examination area. The process support AI assistant performs, via voice interaction or touchscreen keying interaction, automatic inquiry and auxiliary nervous system scale scoring, and further provides real-time retrieval support for a knowledge base and a clinical guideline. The AI-assisted decision-making system is configured to assist in decision-making based on an automatic inquiry result, a scale score result, the test result, and magnetic resonance imaging results of the head and neck, to generate and display a therapy regimen.

Abstract: A system and a method for measuring creep of a hydro-generator are provided. In the system, circle of “sawtooth waveform” ribbon is arranged around an outer wall of a main shaft of a hydro-turbine, a “sawtooth waveform” of the ribbon is formed by arranging isosceles right triangles, a hypotenuse of the isosceles right triangle forms a straight line segment, the isosceles right triangle is painted with a color code, a camera is arranged directly opposite to the main shaft of the hydro-turbine, and the camera takes an image of the ribbon and images on an imaging plane at a back end. The main shaft of the hydro-turbine is continuously photographed and sampled with an image, the image processing terminal extracts feature quantities on a reference image and a current image, calculates a creep angle of a set, and sends out an alarm signal when it reaches an alarm value.

Abstract: Apparatus and methods are provided for using a self-illuminating harp to calibrate for distortion. In particular, apparatus, methods and systems are provided for imaging and analyzing self-illuminated harp in order to correct for lens distortion. In various implementations, an array of media is strung plumb which resembles a harp. The media can be light fibers or other suitable material which can be strung in a straight line. The cores of translucent fibers are illuminated. These are configured to scatter light throughout their bulk which escapes the core by egressing along the length of fiber. This light produces plumb lines which can be imaged, analyzed and model. In some implementations, imaging is performed by rotation to include a full FOV.

Abstract: The present technology is directed to determining an accuracy of an infrared (IR) camera, and more particularly, validating a distortion accuracy of an IR camera. The present technology can receive one or more images of a calibration harp captured by the IR camera, wherein the one or more images include a plurality of lines corresponding to a plurality of strings of the calibration harp. The present technology can further determine a degree of distortion of the plurality of lines based on a distortion error coefficient, wherein the distortion error coefficient is computed based on edge points of the plurality of lines on the one or more images.

Abstract: A polyhedral sensor target includes multiple surfaces. A housing, such as a vehicle, may include a camera and a distance measurement sensor, such as a light detection and ranging (LIDAR) sensor. The housing may move between different positions during calibration, for instance by being rotated atop a turntable. The camera and distance measurement sensor may both capture data during calibration, from which visual and distance measurement representations of the polyhedral sensor target are identified. The camera and distance measurement sensor are calibrated based on their respective representations, for example by mapping vertices within the representations to the same location.

Abstract: The present invention relates to a dynamic carbon sink measurement method for afforestation carbon sink and forest management carbon sink projects, comprising: (1) monitoring the project boundary; (2) monitoring the baseline IoT; (3) monitoring the project IoT; (4) monitoring the real-time total carbon stock and carbon change; (5) determining the monitoring end and monitoring the automatic period. The invention dynamically obtains the baseline and project carbon density by deploying carbon layer carbon density IoT monitoring sample plots.

Abstract: A method and system for positioning a target in a brain region are provided. The method includes: obtaining datasets of N persons at a first time point and a second time point after stroke; constructing a first lesion mapping functional network based on each resting-state functional magnetic resonance imaging image in a first stroke dataset; constructing an acute phase cognitive-lesion mapping functional network; constructing a chronic phase cognitive-lesion mapping functional network; comparing the acute phase cognitive-lesion mapping functional network with the chronic phase cognitive-lesion mapping functional network to obtain a key improvement network; calculating a whole-brain functional connectivity network with each voxel as a seed point, and performing spatial correlation calculation on the whole-brain functional connectivity network and the key improvement network to obtain a spatial correlation network; and determining a therapeutic target of the functional image to be positioned.

Abstract: The present invention relates to a dynamic carbon sink measurement method for afforestation carbon sink and forest management carbon sink projects, comprising: (1) monitoring the project boundary; (2) monitoring the baseline IoT; (3) monitoring the project IoT; (4) monitoring the real-time total carbon stock and carbon change; (5) determining the monitoring end and monitoring the automatic period. The invention dynamically obtains the baseline and project carbon density by deploying carbon layer carbon density IoT monitoring sample plots.

Abstract: The invention relates to the field of biomedical engineering, and discloses a hemostatic agent for jaw central hemangioma hemorrhage and a preparation method and application thereof. The invention is as follows: chitosan powder and organic weak acid are added into organic alcohol to react, so as to prepare chitosan weak acid salt, and then the chitosan weak acid salt is mixed with carboxymethyl chitosan in proportion to obtain the hemostatic agent of the invention. The hemostatic agent of the invention has good fluidity and plasticity. When applied to the hemostasis of jaw central hemangioma hemorrhage, the hemostatic agent of the invention can quickly reach the point of jaw central hemangioma hemorrhage without any stimulatation and damage to the tissue. In addition, the hemostatic agent of the invention can inhibit the growth of bacteria, eliminate cross infection, and is easy to clean and remove.