14results about How to "Maintain structure" patented technology

This invention discloses a dual-stream point cloud compression method and system based on semantic scene graphs, relating to the field of point cloud compression. It constructs a point cloud compression network comprising an encoder network and a decoder network: In the encoder network, semantic labels are mapped onto the input point cloud, and scene graphs and octree representations are constructed respectively. Semantic modulation parameters are generated based on the scene graph and encoded to obtain a semantic bitstream. The octree representation, under the influence of semantic modulation parameters, undergoes feature enhancement and attention probability prediction to obtain node occupancy probabilities, and a geometric bitstream is generated through arithmetic encoding. These two bitstreams serve as compressed data. In the decoder network, the bitstreams are decoded, and the octree structure and scene graph information are reconstructed. Node feature representations are recovered by combining the semantic modulation parameters. The reconstructed octree structure is mapped back to the point cloud space through spatial querying and indexing to reconstruct the point cloud. This invention solves the problem of local geometric distortion in low-bitrate octree point cloud compression, ensuring reconstruction quality while reducing the transmission bitrate.

The embodiment of the invention provides a video generation method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of artificial intelligence. According to the method, a reference image and a text cue word are obtained, and a complete background image, an external expansion background image and a target object image are generated according to the reference image, so that the generation of a video clip depends on a unified and expanded background reference, and the structure and color continuity of a background region is kept in a segmentation generation process; on the basis, multi-stage background modeling of a complete background image and an external expansion background image is combined, so that background consistency of the generated video clip is kept, and dynamic change of the target object under rich semantic guidance is realized. The continuous and complete video content is obtained after splicing, the static and steady state characteristics of the background can be maintained, the cross-segment background texture and hue drift can be significantly reduced, and the stable presentation of the background area under the main body action change can be realized.

The application discloses a motor imagery electroencephalogram signal denoising method and device, medium and product, relates to the technical field of deep learning and biomedical signal processing, and the method comprises the following steps: acquiring a target electroencephalogram signal containing artifacts; inputting the target electroencephalogram signal containing artifacts into a trained electroencephalogram denoising model to obtain a final denoised electroencephalogram signal; wherein the electroencephalogram denoising model comprises an electroencephalogram denoising branch, an artifact prediction branch and an artifact representation interaction attention fusion reconstruction module; the electroencephalogram denoising branch comprises a multi-scale self-adaptive enhancement module, a frequency domain dynamic enhancement module and a feature extraction module. The application solves the problems of traditional electroencephalogram denoising methods in signal fidelity, spectral fidelity, spatial structure preservation and generalization ability.

The present application relates to the technical field of geotechnical engineering investigation, and specifically discloses a rock-soil investigation adjustable-depth sampling method, which acquires pore fluid pressure data in real time through a sensor group arranged at the front end of a sampler; based on the data, the evolution trend of the pressure field in front of the sampler is dynamically predicted, and a prediction result containing the pressure abnormal state and its space-time information is generated; the prediction result is processed in stages to obtain a pressure risk level; the level is used in a collaborative decision with the soil sensitivity and the target sampling quality to generate a dynamic control strategy; finally, the penetration action of the sampler is adjusted in real time according to the strategy, including performing a micro-retraction and re-penetration cycle or a gradual deceleration operation, and the control effect is ensured through closed-loop optimization; the present application can actively suppress water hammer and cavitation effect, and improve the quality and reliability of obtaining undisturbed samples in complex strata.

The invention discloses antibiotic bioactive glass and a preparation method thereof, and belongs to the technical field of bioactive glass, the antibiotic bioactive glass comprises the following raw materials by weight: 10-20 parts of bioactive glass powder; 5 to 15 parts of chitosan; 1 to 5 parts of lidocaine hydrochloride; 0.5 to 3 parts of vancomycin; 60-150 parts of a 1% acetic acid aqueous solution; 3-8 parts of a sodium tripolyphosphate solution; the invention aims to solve the problems of weak interface bonding force, difficult antibiotic release control and single function of the traditional material, and by introducing the phosphosilane strontium as an interface molecule, the two-phase interface bonding force is enhanced, the structural integrity and mechanical properties of the material are improved, the osteogenic differentiation is promoted, and the osteoclast activity is inhibited. The material is loaded with vancomycin and lidocaine at the same time, provides antibacterial and analgesic functions, has synergistic anti-infection, analgesic and bone repair capabilities, and is suitable for bone defect repair.

A camera actuator according to an embodiment of the present application is characterized by including a first carrier that moves in one or more directions, a housing that supports movement of the first carrier, a second carrier that moves in one or more directions with reference to the first carrier and is provided with a magnet, a coil that opposes the magnet, a circuit substrate that includes a first portion fixed to the housing, a second portion provided with the coil and fixed to the first carrier, and a connection portion that connects the first portion and the second portion and has one or more bending portions, and a support member that is provided at the bending portion and physically supports the bending portion.

The application discloses a kind of based on intravascular imaging optimization three-dimensional vascular model interframe interpolation method;Obtain the sequence image group collected by intravascular imaging technology;And each frame image in sequence image group is carried out denoising processing;Using segmentation algorithm extracts the lumen boundary in each frame image, obtains the two-dimensional profile sequence image group of vascular lumen with frame data;Interpolation times are calculated;According to interpolation times, difference image group is generated, and according to the frame data of each image in difference image group, it is inserted into two-dimensional profile sequence image group;According to the last obtained two-dimensional profile sequence image group, generate high-resolution three-dimensional vascular model.The application is obtained by the frame interpolation technology of image collected by intravascular imaging technology, and the frame distance of adjacent image is reduced, and the continuity and smoothness of three-dimensional vascular model are improved.

The utility model provides a telescopic double parallel rail detection dolly, through adopting adjustable frame structure of flexible adjustment function to solve the problem of track adaptability and insufficient rigidity of equipment in the operation process, and the telescopic double parallel rail detection dolly includes guide wheel, drive wheel and frame body, the guide wheel includes guide wheel wheel body and connecting seat, and the guide wheel wheel body is connected with the connecting seat, and the guide wheel is connected with the crosspiece of frame body through the connecting seat, the drive wheel includes drive wheel wheel body and drive wheel axle, and the drive wheel is installed in the crosspiece center position of frame body, the drive wheel wheel body is embedded with C type steel rail groove part, and the frame body includes telescopic longitudinal rod, crosspiece and arc reinforcing plate, so that the telescopic double parallel rail detection dolly has adjustable spacing, high stability, and the adjustable spacing makes it can adapt to the track of different spacing, and the high stability guarantees to accurately and reliably complete each detection task in the detection process.

The invention relates to a house building energy-saving roof high-reflection heat-insulation coating and a construction process thereof, the coating comprises a high-reflection heat-insulation main coating formed by curing, and the high-reflection heat-insulation main coating is prepared from raw materials in parts by mass; the colloidal silicon dioxide subjected to surface modification by organosilane is distributed at a contact interface of the borosilicate hollow glass beads and the hydrophobic silicon dioxide aerogel powder and is used for forming an interface bridging unit; the median particle size of the borosilicate hollow glass beads is set to be as follows, the median particle size of the hydrophobic silicon dioxide aerogel powder is set to be as follows, and the average particle size of the colloidal silicon dioxide subjected to surface modification by organosilane is set to be as follows; the mass ratio of the borosilicate hollow glass beads to the hydrophobic silicon dioxide aerogel powder to the colloidal silicon dioxide surface-modified by the organosilane is 1: (0.50-0.75): (0.20-0.32). According to the invention, the interfacial compatibility and dispersion stability of the aerogel particles and the hollow glass beads in a film forming system are improved, and the distribution stability of the functional filler in a coating is improved.

This invention discloses an engineering exploration and sampling device. The invention relates to the field of engineering exploration and sampling technology, and includes a platform and a control module. The platform is equipped with a centrifugal mechanism, which includes a turntable rotatably connected to the platform. A rotating arm is mounted on the turntable, and a sample tube and a drill tube are mounted on the rotating arm. One end of the sample tube is connected to one end of the drill tube, and the sample tube and drill tube rotate synchronously. A pressure limiting mechanism is installed on the platform, and a limiting mechanism is installed inside the sample tube. This invention enables the smooth transfer of complex soil and rock samples, including loose sand and gravel, soil layers, broken rock cores, and mud, from the drill tube to the sample tube by uniformly applying centrifugal force to the entire sample without opening the tube, flipping, or artificial disturbance. It features the ability to achieve overall, controllable, and synchronous transfer of complex samples with minimal or no intervention.

This invention discloses a low-serum MDCC-MSB1 (MSB1) suspension culture medium and an inactivated chicken infectious anemia virus (TIV) vaccine. The culture medium comprises amino acids, carbon source, additives, vitamins, inorganic salts, buffer salts, and water, and further contains newborn calf serum (NBCS). Using this medium, low-cost, high-density suspension culture of MSB1 cells can be achieved, significantly improving cell culture stability. After 30 consecutive passages at a 1% volume ratio of NBCS, the viability of MSB1 cells remains above 94%, with uniform cell morphology and a clumping rate of <3%, making it suitable for large-scale bioreactor production. Furthermore, when applied to the preparation of an inactivated chicken infectious anemia virus vaccine, it can comprehensively improve virus propagation efficiency, increasing virus production efficiency by more than 25%, with a virus titer of not less than 1.0 × 10⁻⁶. 8.0 TCID 50 / ml, ensuring stable quality in large-scale production.

This application discloses a method, apparatus, medium, and product for ocean data assimilation. The method includes: acquiring matching data of first and second type observation data within first and second assimilation time windows, where the first and second type observation data are observation data from different observation periods corresponding to the region simulated by a regional ocean model; mapping the first and second model average states corresponding to the regional ocean model within the first and second assimilation time windows to the three-dimensional spatial positions of the first and second type observation data, obtaining first and second model estimated data; determining first and second innovation vectors of the regional ocean model based on the difference between the first and second model estimated data and the corresponding matching data; determining the target analysis increment of the regional ocean model based on the first and second innovation vectors; and updating the target analysis increment to the regional ocean model using a relaxed incremental analysis update method. This application can improve the accuracy of ocean data assimilation.

The utility model discloses a low-dissolution-loss long-service-life spray dryer for preparing a manganese adsorbent material, which relates to the technical field of manganese adsorbent material preparation and is technically characterized by comprising a dryer shell, a controller, a discharge pipe, a suction pipe, a centrifugal atomizer, a feeder and a liquid pump. A heating mechanism used for heating liquid mist is arranged on the dryer shell, the heating mechanism comprises an air outlet ring rotationally connected to the dryer shell, and a transfer ring is arranged on the side wall of the air outlet ring in a communicating mode. The material quality problem caused by local overheating or non-uniform drying is reduced, the dissolution loss of the material is low, and the overall service life of the equipment is long.

The invention provides a ship radiation noise data augmentation method based on spectrum reconstruction, a medium and a system, and belongs to the technical field of ship radiation noise processing. After a continuous spectrum and a line spectrum are separated through smooth filtering, a continuous spectrum segmentation parameter, a line spectrum frequency amplitude parameter and a modulation spectrum fundamental frequency parameter are extracted; constructing a continuous spectrum reconstruction game model and a line spectrum detection game model to respectively optimize a filter coefficient and a detection threshold, solving the filter coefficient based on the continuous spectrum reconstruction game model by adopting a variable step size normalized adaptive iterative algorithm, and generating a continuous spectrum reconstruction time domain signal; a line spectrum effective frequency set is determined by adopting a constant false alarm rate adaptive detection algorithm based on a line spectrum detection game model, then a line spectrum reconstruction time domain signal is generated, a modulation pulse sequence is constructed according to the main shaft frequency and the blade number to generate a modulation spectrum reconstruction time domain signal, and the technical problem that the number of ship radiation noise samples is insufficient is solved.