6results about How to "Controllable growth" patented technology

This invention belongs to the field of core-shell material technology and discloses a core-shell material based on nickel-manganese oxide / nickel-manganese organic framework and its preparation method, including the following steps: mixing nickel salt, manganese salt and organic ligand solution, and carrying out a hydrothermal reaction under alkaline conditions to synthesize a nickel-manganese organic framework precursor; subjecting the nickel-manganese organic framework precursor to programmed temperature heat treatment in a mixture of inert gas and oxygen to obtain a heterogeneous nanostructured nickel-manganese oxide / nickel-manganese organic framework core-shell material. By precisely controlling the concentration of the organic ligand solution and the pH value of the reaction system, and by optimizing the synthesis conditions, uniform and controllable growth of the nickel-manganese organic framework core is achieved.

The application discloses application of bile acids in weaning piglet feeding and relates to the field of piglet breeding, and aims to solve the problem that different types of bile acids have unclear effects on piglets in the prior art. The technical scheme is that optimal bile acids corresponding to different purposes are provided in the growth process of piglets. By selecting optimal bile acids for different biological sign improvement targets, the use of different types of bile acids is more clear, and the growth of piglets is more controllable.

The application discloses a kind of tunnel lining crack detection method and system based on improved YOLO model, constructs the tunnel lining crack detection model based on improved YOLO (including but not limited to YOLOv8-YOLOv12 and its derivative architecture), including in the feature extraction module of main network Backbone, introduction expansion residual network DWR;Variable convolution and channel-space double attention mechanism are introduced in detection head network Head;Optimize bounding box regression loss function, and boundary box regression loss is calculated using Inner-CIoU loss function.The application realizes the high-precision, real-time detection of multi-scale cracks, especially fine cracks, under the premise of not significantly increasing the computing overhead, through the multi-level, collaborative improvement of network structure.This method is not only suitable for tunnel lining crack detection, but also can be widely used in the detection of other fine crack defects such as bridges, roads and building exterior walls.

The invention discloses an MOFs confinement synthesized nanoscale conjugated polymer, a preparation method and application thereof, and particularly relates to the technical field of photocatalysis, according to the MOFs confinement synthesized nanoscale conjugated polymer, an ultrasonic cavitation effect is used for promoting monomer molecules adsorbed in a pore channel to be arranged in order in the pore channel direction, preparation is made for subsequent directional polymerization, and the preparation process is simple. And through acoustochemical confinement polymerization, it is ensured that a polymerization reaction is strictly limited in a nanopore channel of MOFs, so that accurate and controllable growth of a conjugated polymer chain is realized, and a CP nanostructure with controlled size and morphology is formed. The mass transfer efficiency and the overall photocatalytic performance of the nano-scale conjugated polymer synthesized by MOFs in a confined manner are remarkably improved, and an innovative thought and an effective solution are provided for the development of a photocatalytic technology.

The application discloses a carbon nanotube / graphene composite conductive agent and a preparation method thereof, and relates to the technical field of lithium ion battery materials. The application constructs a three-dimensional porous framework by intercalating zinc ions into graphene oxide, provides a highly dispersed catalyst by using iron ammonium citrate, introduces magnesium chloride to establish a magnesium thermal protection mechanism to ensure uniform growth of carbon nanotubes, and uses polyethylene glycol and tartaric acid as a carbon source pore-forming agent. Lithium carbonate is in-situ encapsulated to form a pre-lithiation unit. The application constructs a three-dimensional intercommunication network structure with synergistically enhanced electronic conduction and ion transmission by using a spray-freezing granulation process and a one-step catalytic chemical vapor deposition process. The application has high electrical conductivity, excellent dispersibility and structural stability, high process integration and environmental friendliness, and has significant industrial application potential.

The invention discloses a two-dimensional antiferromagnetic material and a preparation method and application thereof, and the method comprises the following steps: adopting Mn and Te elementary substance powder, taking I2 as a transportation agent, and synthesizing a blocky MnTe precursor through a vacuum chemical vapor transport method under a vacuum sealing condition; the preparation method comprises the following steps: mixing a ground MnTe precursor with In elementary substance powder and fluxing agent KCl powder, carrying out fluxing reaction in a vertical confinement space constrained by a constant normal pressure and in an inert atmosphere, and inducing the crystal to epitaxially grow along the horizontal direction, thereby forming a two-dimensional Mn (InTe2) 2 crystal on a fluorine crystal mica substrate, and carrying out wet transfer to obtain the two-dimensional Mn (InTe2) 2 crystal on a SiO2 / Si substrate, according to the method, the two-dimensional Mn (InTe2) 2 crystal with the antiferromagnetic characteristic is prepared through a step-by-step precursor induction type confinement pressure melting epitaxial method, and the method is simple in process and high in repeatability; the two-dimensional Mn (InTe2) 2 crystal has the characteristics of good crystal quality, large transverse size, controllable layer number and the like, and can be applied to a high-density magnetic storage device.