4results about How to "Reduced eddy current effect" patented technology

This invention relates to the field of chemical production technology and discloses a cyclohexanone oxime rearrangement mixer structure, a numerical simulation model, and an analysis method. The cyclohexanone oxime rearrangement mixer structure includes a main structure, a circular ring, a cyclohexanone oxime inlet, and cyclohexanone oxime orifices. The main structure is vertical, with a circulating liquid inlet, a throat, and a mixture outlet arranged sequentially from top to bottom. A circulating liquid containing caprolactam, sulfuric acid, and SO3 flows into the main structure from the circulating liquid inlet. The circular ring is fitted onto the main structure and located between the circulating liquid inlet and the throat. To achieve thorough mixing of cyclohexanone oxime and the circulating liquid, the numerical simulation model is constructed using the Eulerian multiphase flow model and the Realizable k-ε turbulence model. The momentum ratio (MR) is used as an evaluation index for mixing effect, ensuring the momentum ratio is within a suitable range of 1-4, thereby achieving efficient mixing.

This invention discloses an MRI passive shimming optimization method based on the PSA-SQP hybrid algorithm, comprising the following steps: (1) Magnetic field mapping to evaluate the uniformity of the magnetic field: the magnetic field non-uniformity at a specific sampling location within the imaging area is evaluated using a magnetic field probe / camera; (2) Establishing an optimization model for passive shimming; (3) Hybrid algorithm optimization of passive shimming: combining the pattern search algorithm PSA with sequential quadratic programming SQP to find the optimal solution for the iron block in the passive shimming system. PSA is run in advance to perform a global search, obtaining elite individuals as initial values ​​for SQP optimization, and then the optimal solution for the iron block in the passive shimming system is found by running SQP. This algorithm can achieve high magnetic field uniformity and also has limitations on the weight of the shimming iron sheet. Importantly, it can achieve a sparse distribution of the shimming iron sheet.

The application discloses a permanent magnet with an insulation layer and a preparation method and application thereof, the permanent magnet is provided with a separation groove, the groove of the separation groove is filled with an insulation layer, and the insulation layer can be a glue layer, an expansion coating, an injection agent or the like insulation material. According to the reasonable regulation and control of the three-dimensional direction size and filling rate of the separation groove, different strength permanent magnets can be accurately obtained according to target requirements, so that the permanent magnets are suitable for different application scenarios and cost can be saved. Meanwhile, the vacuum pressing process is adopted to fill the insulation layer in the separation groove of the permanent magnet, so that the permanent magnet with different shapes, widths and depths of the separation groove can be suitable, the filling rate of the insulation layer (such as glue) in the separation groove of the permanent magnet is high, so that the mechanical performance of the permanent magnet is guaranteed; meanwhile, the flatness of the insulation layer after filling of the separation groove and the surface of the permanent magnet can be improved after vacuum treatment, and the overall corrosion resistance of the product is further improved.

The invention provides a baby incubator and a baby culture transfer imaging system, and relates to the technical field of medical treatment. The infant incubator comprises a base, an infant cabin, an air duct structure, a flow driving device, a heating device and a heat exchange device, two ends of the air duct structure are respectively communicated with an air inlet and an air return port of the baby cabin to form an air flow circulation path; the heating device is at least partially located in an inner cavity of the air duct structure so as to heat fluid in the air duct structure. The flow driving device comprises an airflow driving part and a driving unit, the airflow driving part is located in an inner cavity of the air duct structure, the driving unit is in driving connection with the airflow driving part, and the driving unit comprises a non-magnetic motor; the heat exchange device is thermally coupled with the driving unit and airflow in the air duct structure, and the thermal coupling position of the airflow in the air duct structure and the heat exchange device is located on the upstream of the heating device.