4 results about "Superconducting magnet" patented technology

The invention discloses a low-temperature high-thermal-conductivity polymer composite material and a preparation method thereof, and belongs to the technical field of magnetic confinement nuclear fusion. A low-temperature high-thermal-conductivity filler and a polymer matrix are compounded through a specific process; the low-temperature high-thermal-conductivity filler in the material surrounds the polymer to form a quasi-continuous thermal-conductivity network, and the high thermal conductivity of 100 W.m <-1 >. K <-1 > can be achieved when the volume percent of the thermal-conductivity filler is 50% in a low-temperature environment (such as 4K). Under the condition of the same volume percentage of the heat-conducting filler, the low-temperature high-heat-conducting polymer composite material disclosed by the invention is far higher than other polymer composite materials, can be applied to the low-temperature heat and mass transfer fields such as superconducting magnets and the like, and has the advantages of light weight, low temperature resistance, easiness in processing and the like; the preparation method of the low-temperature high-thermal-conductivity polymer composite material is simple and reliable, and has great advantages in the aspect of batch production.

This invention discloses a low-temperature high thermal conductivity polymer composite material and its preparation method, belonging to the field of magnetic confinement nuclear fusion technology. This invention uses a specific process to composite a low-temperature high thermal conductivity filler with a polymer matrix. Compared to the microstructure of conventional polymer thermally conductive composite materials, this material has a quasi-continuous thermally conductive network formed by the low-temperature high thermal conductivity filler surrounding the polymer. At low temperatures (e.g., 4K), when the volume percentage of the thermally conductive filler is 50%, it can reach 100 W·m³. ‑1 ·K ‑1 The low-temperature high thermal conductivity polymer composite material of this invention exhibits significantly higher thermal conductivity than other polymer composite materials under the same thermally conductive filler volume percentage. It can be applied in low-temperature heat and mass transfer fields such as superconducting magnets, and possesses advantages such as lightweight, low-temperature resistance, and ease of processing. Furthermore, the preparation method of the low-temperature high thermal conductivity polymer composite material of this invention is simple and reliable, offering significant advantages in mass production.

The application relates to the technical field of long-time sequence prediction, and discloses a superconducting magnet multi-step temperature prediction method based on an improved whale optimization algorithm, which comprises the following steps: pre-processing original data sets related to the temperature of a superconducting magnet; constructing a whale optimization algorithm according to the logic of three kinds of hunting behaviors of a whale group hunting, and initializing a whale population; improving the whale optimization algorithm by combining Cauchy mutation and double adaptive weights; inputting a training data set into a long-short term sequence model, combining the improved whale optimization algorithm to optimize and adjust the long-short term sequence model super parameters, and updating the best long-short term sequence model super parameters; using the updated best super parameters to directly-recursively perform multi-step temperature prediction on a verification set, comparing the temperature prediction result with actual temperature data to check the prediction accuracy; and using the updated best super parameters to directly-recursively perform multi-step temperature prediction on a test set, comparing the temperature prediction result with actual training data to evaluate the prediction accuracy.

The application provides a carbon fiber directional skeleton and a prepared heat-conducting composite material, and relates to the technical field of advanced functional materials.The application first provides a carbon fiber / phenolic resin preform, uses the preform to prepare the carbon fiber directional skeleton, and further prepares the heat-conducting composite material.The preparation of the carbon fiber directional skeleton is not affected by the viscosity of the base material; meanwhile, the magnetic field strength used in the application is low, and the material preparation process is not limited by expensive superconducting magnet equipment and low-viscosity polymer base, so that the universality is very strong.The carbon fiber directional skeleton is used to prepare the heat-conducting composite material with carbon fiber directional arrangement, and the heat-conducting composite material has excellent vertical heat-conducting performance or in-plane heat-conducting performance, and has a good application prospect.