13results about How to "Realize precise regulation" patented technology

The invention discloses a plasma rotation type large-area polycrystalline MPCVD diamond growth method, and relates to the technical field of microwave plasma chemical vapor deposition, and the method comprises the following steps: S1, setting environmental parameters of diamond growth in a reactor through a microwave feeder, sampling plasma state data in the reactor, and calculating the plasma state data; if the plasma is stably started, executing S2; and S2, the plasma state in the reactor is adjusted through the plasma regulator according to the plasma state data in the reactor, the coverage area of plasma discharge is increased, and then the growth area of the polycrystalline diamond is increased.

The invention relates to the technical field of copper powder preparation, and provides a preparation method of liquid-phase in-situ self-assembly nano-shell-coated micron-core composite copper powder, a specific inducer is introduced into a liquid-phase reduction system, copper sulfate is adopted as a copper salt, and sodium hypophosphite or VC is adopted as a reducing agent, so that one-time forming of a micron-core-nano-shell composite structure is realized; the problems of non-uniform particle size distribution, high energy consumption, low yield and the like in a traditional copper powder preparation method are effectively solved; according to the prepared composite copper powder, the low-temperature sintering driving force brought by the nanometer shell layer is obtained while the process-friendly characteristics of being easy to filter, easy to wash, easy to dry and the like of micron powder are reserved, the initial sintering temperature can be reduced to about 150 DEG C, and the machining performance of the copper powder under the low-temperature condition is remarkably improved.

The application discloses a kind of based on dynamic feature fusion's oral root tip sheet segmentation method and device, it is related to medical image processing technical field.The method includes: obtaining unannotated oral periapical X-ray image and annotated oral periapical X-ray image;According to unannotated oral periapical X-ray image, the initial structured block adaptive mask self-encoder is pre-trained to self-supervision;According to annotated oral periapical X-ray image and trained structured block adaptive mask self-encoder, the initial oral periapical X-ray film multi-class structure segmentation model is trained, and the trained oral periapical X-ray film multi-class structure segmentation model is obtained;To-be-segmented oral periapical X-ray image is input into trained oral periapical X-ray film multi-class structure segmentation model, and the segmentation result corresponding to to-be-segmented oral periapical X-ray image is obtained.The application reduces the dependence on artificial annotation, and improves the accuracy of oral periapical X-ray image segmentation.

The application discloses a preparation method of a high-plasticity hierarchical structure SnO2 reinforced modified silver-based composite material. The application quantitatively and stably prepares SnO2 reinforced phase powder with a sandwiched three-layer structure type and a hierarchical structure characteristic by using a crystal type transformation regulation and control new strategy, and combines a cumulative cold drawing process to prepare a new type of Ag / SnO2 composite material with high plasticity, solves the industry bottleneck problems of poor plasticity and high processing difficulty of a traditional Ag / SnO2 composite material, and promotes the industrialization process of the Ag / SnO2 composite material.

The application relates to an off-line loading device for studying thermal attenuation of a fuel cell catalytic layer and a use method, and realizes thermal attenuation of the catalytic layer in an external heat source heating mode. The off-line loading clamp comprises a clamp base, a pressure component and a pressure adjusting knob, and is used for clamping and fixing a sample to be measured; the temperature control assembly comprises a heating component, a temperature sensor and a temperature digital display component, and is used for monitoring and visualizing the internal temperature of the sample to be measured; the pressure control assembly comprises a pressure sensor and a pressure digital display component, and is used for monitoring and visualizing the bearing pressure of the sample to be measured. Compared with the prior art, the application excludes the interference of chemical degradation in in-situ testing, can realize accurate regulation of key factors influencing the catalytic layer thermal attenuation process such as the bearing pressure, the internal temperature and the internal humidity of the sample, and has the advantages of simple structure and convenient operation.

The invention belongs to the technical field of core nuclear magnetic resonance measurement, and provides a mobile core nuclear magnetic resonance measurement method and system based on step length control, and the method comprises the steps: carrying out the calibration of different positions of a coil, and obtaining the calibration coefficients corresponding to the different positions of the coil through a moving stepping mode; after the coil is scaled, the core to be tested is moved to a coil signal acquisition area for testing according to a set step length based on a scale coefficient; during testing, the same stepping mode is kept in the scale process, T2 signals of the full-diameter to-be-tested rock cores at different length positions are obtained, and nuclear magnetic resonance data of the to-be-tested rock cores are obtained through data processing. By means of accurate driving of the stepping motor, errors caused by manual operation or mechanical instability in traditional measurement are eliminated, repeatability and consistency of measurement are greatly improved, and reliable guarantee is provided for subsequent data analysis.

The invention relates to the field of batteries, and provides a battery monomer and a preparation method thereof, a battery device, a power utilization device and an energy storage device.The preparation method of the battery monomer comprises the steps that a battery cell assembly is provided, and the battery cell assembly is formed by laminating or winding a positive plate, a diaphragm and a negative plate; providing a shell, and placing the battery cell assembly in the shell; providing an electrolyte, and injecting the electrolyte into the shell; carrying out a formation step; the positive plate comprises a positive active component, the positive active component comprises a modified MXene material, and the modified MXene material comprises an MXene matrix and an Al2O3 / AlF3 gradient coating layer coating the MXene matrix. And the electrochemical stability, the cycle life and the safety performance are remarkably improved at least on the basis of keeping the high conductivity of the material.

This invention relates to a monolithic electrocatalyst based on a 3D-printed polyacrylic acid (PAA) framework, its preparation method, and its applications. Belonging to the field of electrocatalysis, this invention utilizes photopolymerization 3D printing technology to construct a PAA framework with hierarchical channels. Active components can be further grown on the framework via in-situ hydrothermal methods or electrodeposition to form an M-PAA-MOF-like composite material. This material exhibits controllable pore structure precision, a MOF loading of up to 25 wt%, and excellent conductivity. This invention represents a groundbreaking innovation using polymers as metal ligands. The prepared material is suitable for electrocatalytic reactions such as oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), as well as wastewater and waste gas treatment. The material exhibits conductivity at 100 mA·cm⁻¹. ‑2 The overpotential of OER should not exceed 162 mV, and the overpotential of HER should not exceed 355 mV.

The application belongs to the technical field of optical fiber sensing and functional materials, and discloses a composite aerogel and application of the composite aerogel in preparation of an optical fiber VOCs sensor. On the surface of a multimode interference structure, a composite aerogel sensitive coating with adjustable nanoporous structure is in-situ constructed through a dip-coating and freeze-drying process. By adjusting the ratio of TOCNF and PVA, the specific surface area and surface functional groups of the coating are optimized, and the coating has a specific response mechanism to acetone, which causes the swelling of a polymer network and a significant change in refractive index, and then modulates the wavelength drift of a multimode interference spectrum to realize sensing. The prepared optical fiber VOCs sensor is especially suitable for chemical process safety monitoring, online evaluation of indoor air quality, non-invasive disease auxiliary screening based on breath acetone concentration and other fields.

The invention belongs to the technical field of fuel cells, and provides an aperture-adjustable sulfur-nitrogen co-doped mesoporous carbon material for a fuel cell and a preparation method and application thereof.The preparation method comprises the steps that organic magnesium salt, a polyhydroxy compound capable of being fused and gelatinized at the temperature of 200-300 DEG C and a compound containing sulfur and nitrogen element compound-urea are used as raw materials; after dissolving and uniformly mixing, carrying out heating polymerization and microwave-assisted uniform dispersion; gradually converting the mixed solution into a uniform gel precursor along with the volatilization of the solvent; and grinding into powder, carrying out three-section gradient carbonization program heating carbonization treatment under the protection of inert atmosphere, and removing the template through acid pickling to obtain the target product. According to the present invention, the directional adjustment of the mesopore size and the pore size distribution is achieved, and by using the mesoporous structure as the fuel cell cathode catalyst carrier, the mass transfer path can be effectively optimized by using the high specific surface area and the adjustable mesoporous structure, and the oxygen reduction reaction activity, the polarization performance and the long-term stability can be significantly improved.

The invention relates to the technical field of laser shock peening, and particularly discloses a laser shock peening constraint water film stability control method, which comprises the following steps: analyzing geometrical characteristics and spatial poses of a to-be-peened area of a workpiece, determining an initial water film coverage scheme, and obtaining a non-shielding range of an incident direction of a laser beam; designing a water film applying device with an adjustable inclination angle, and establishing a water film state monitoring system; carrying out a water film stability test under a gradient inclination angle; carrying out a laser shock experiment to obtain an optimal inclination angle; and comparing the residual stress distribution result under the optimal inclination angle with the distribution result under the horizontal placement condition. The protection range of the method covers the whole process from early-stage analysis, device configuration, process monitoring, experimental optimization to final process curing, and a solid methodological basis is provided for high-quality and industrial application of a water constraint mode of laser shock peening under complex working conditions.

The application discloses a kind of continuously tunable surface plasmon resonance sensors, belong to microfluidic sensor field, including liquid metal flow channel in bottom layer and the sample solution flow channel to be measured in upper layer, two layers of flow channel are separated by film;Liquid metal flow channel is Archimedes spiral structure, and the sample solution flow channel to be measured is circular ring structure, and the reconstruction and tuning of sensor are realized by accurate control to liquid metal.The sensor structure of the application has the characteristics of small volume, high sensitivity and tunability.In addition, due to the encapsulability and good biocompatibility of the sensor, the sensor is expected to be implanted in vivo, and the real-time monitoring function thereof is realized by using external excitation.

This invention belongs to the field of polyurethane technology and proposes a fatigue-resistant polyurethane microporous elastomer vibration damping pad and its preparation method. The pad material is composed of component A and component B in a mass ratio of 50~100:100. By mass parts, component A includes: 40~60 parts of polyether polyol C1, 40~60 parts of isocyanate D1, and 5~15 parts of isocyanate D2; component B includes: polyether polyol C2... The composition comprises 60-80 parts of a modified crosslinking agent, 20-40 parts of a modified foaming agent, 0.03-0.09 parts of deionized water, 0-1.5 parts of a color paste, 0.5-3.0 parts of a weather-resistant agent, 0.1-1.0 parts of a modified foaming agent, and 0.3-1.0 parts of a catalyst; component B further comprises a physical foaming agent accounting for 5-20% of the total volume of components A and B; the modified foaming agent is a polyether-modified polysiloxane, whose polyether side chain contains a side-methyltetrahydrofuran segment; the modified crosslinking agent is a multi-arm polyether with trimethylolpropane as an initiator, whose molecular chain contains a tetrahydrofuran segment. This technical solution simultaneously solves the technical problems of inconsistent and unevenly distributed cell size, strong amine odor, and poor fatigue resistance after long-term use in existing technologies.