12results about How to "Controllable growth" patented technology

The invention discloses an isavuconazole sulfate freeze-dried powder injection for injection, and belongs to the technical field of pharmaceutical preparations. The isavuconazole sulfate freeze-dried powder injection for injection is prepared from 70 to 80 weight percent of isavuconazole sulfate and the balance of excipient. By controlling the excipients to be sorbitol and cane sugar and controlling the mass ratio of the sorbitol to the cane sugar to be 1: (3-5), the problem that individual impurities grow rapidly and even exceed the limit after an intermediate product liquid medicine is placed at normal temperature for several hours is solved, the moisture content is controlled to be 0.06% or below after freeze-drying, and the problems that in the prior art, a freeze-dried product is high in moisture and rapid in impurity growth are solved; in addition, the freeze-dried powder injection is short in redissolution time and has remarkable advantages.

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 invention discloses a full roll surface immersion type cooling system for a hot rolling working roll, which comprises a working roll upper roll, a working roll lower roll, an upper water cutting plate and a lower water cutting plate, the upper water cutting plate and the lower water cutting plate correspond to the working roll upper roll and the working roll lower roll, and one side of the working roll upper roll is provided with an upper water collecting tank; an upper spraying system and an upper water collecting tank water cutting plate are arranged on the upper water collecting tank; an upper roll surface dynamic cooling water space is formed between the upper water collecting tank water cutting plate and the roll surface of the working roll upper roll; a lower water collecting tank is arranged on one side of the lower working roll, and a lower spraying system and a lower water collecting tank water cutting plate are arranged on the lower water collecting tank; and a lower roll surface dynamic cooling water space is formed between the water cutting plate of the lower water collecting tank and the roll surface of the lower roll of the working roll. According to the method, the purpose of the extreme use efficiency of the roller is achieved, the online loss of the working roller is reduced, the service life of the working roller is prolonged, the online use time is prolonged, and the roller replacement period is prolonged.

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.

A method for changing the orientation of a growing film, which relates to a vacuum evaporation deposition film process. The substrate is cleaned with alcohol, acetone and deionized water at room temperature, cleaned in an ultrasonic cleaner to remove impurities on the substrate surface, and the cleaned sample is placed in a fast sample chamber; a mechanical pump and a turbomolecular pump are used to obtain 10 ‑ 8 After the growth chamber is filled with a vacuum of mbar, the substrate is transferred from the fast sample feed chamber into the growth chamber of the growth equipment, and the sample is annealed in an O atmosphere; at the same time, a plasma-activated Zn metal source and Mg metal source are introduced to grow a MgZnO film for 2 hours. After the growth is completed, the sample is taken out. It can solve the problems related to expensive hexagonal substrates, complex process conditions, and the selection of polarity and non-polarity, and achieve pure, controllable, and precise growth. Under the condition that the temperature, pressure and other process parameters remain unchanged, a growth film with different crystal orientations can be deposited on the same material.

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 invention belongs to the field of lithium battery negative electrode materials, and particularly relates to a step-by-step CVD preparation method for improving the low-temperature cyclicity of a graphite negative electrode material. The preparation method comprises the following steps: firstly preparing a core layer of the graphite negative electrode material, and then preparing the carbon-coated graphite composite negative electrode material by adopting a step-by-step CVD (Chemical Vapor Deposition) method. According to the invention, a graphite substrate is used as a core layer of a negative electrode material, then a step-by-step CVD method is adopted to perform a nucleation reaction at a low speed to deposit a layer of high-compactness and uniform initial film by controlling the type, flow rate, temperature, pressure and other conditions of reaction gas, and then a layer of amorphous carbon layer is grown cyclically at a relatively high speed to prepare the negative electrode material. The distributed CVD preparation method has the characteristics of controllable growth and uniform and compact coating, can effectively improve the cycling stability of the lithium battery, and particularly improves the cycling stability of the lithium battery at a low temperature.

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.

The present application relates to the field of hot working of nonferrous metals, and specifically to a method for controlling the β grains of a TC21 titanium alloy thin web die forging. The method comprises the following steps: S1: establishing the relationship between the forging ratio of the TC21 forging after forging in the two-phase region and the initial β grain size when heated in the single-phase region; S2: testing the time-dependent change of the β grain size of the TC21 titanium alloy when heated in the single-phase region; S3: after the two-phase region billet is formed, the forging ratio of the TC21 thin web forging is determined according to the required β grain size of the forging. β +Δt holding time at temperature, Δt is 15-25℃; S4: die forging. The present invention establishes the relationship between the forging ratio and the initial β grain size of the forging when the TC21 titanium alloy is made in the two-phase region, and combines it with the growth model of the β grains, which can directly determine the holding time of the TC21 titanium alloy thin web forging in the single-phase region, and can ensure that the β grain size growth of the forging is controllable and meet the mechanical property requirements of the forging.

The invention belongs to the field of lithium battery negative electrode materials, and particularly relates to a composite metal silicon carbon negative electrode material and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing a core layer of the silicon-carbon negative electrode material by adopting a CVD (Chemical Vapor Deposition) method, and then preparing inner shell layer and outer shell layer carbon by adopting an MOCVD (Metal Organic Chemical Vapor Deposition) method to obtain the composite metal silicon-carbon negative electrode material with a core-inner shell-outer shell structure. The core layer is made of a silicon carbon material; the inner shell layer is a carbon coating layer or a metal film layer; and the shell layer is a carbon coating layer or a metal film layer. According to the invention, the core layer silicon-carbon material of the silicon-carbon negative electrode material is firstly prepared, and then the carbon layer / metal layer or metal layer / carbon layer can be deposited on the surface of the core layer at one time by using the MOCVD method, so that the process is simpler, the growth of the coating layer is controllable, the uniformity is good, and the obtained silicon-carbon negative electrode material is high in specific capacity and first efficiency and more stable in cycle performance; and the service life of the lithium ion battery is prolonged.