14results about How to "Reduce formation rate" patented technology

This invention provides an arc-based additive and subtractive manufacturing method based on interlayer morphology reconstruction, belonging to the technical field of metal additive manufacturing. The method includes depositing an Nth layer of metal material on a substrate to form a deposition layer with a natural wavy morphology; acquiring actual morphology data to identify peak and valley distribution characteristics and planning a subtractive manufacturing path; selectively turning the deposition surface to obtain an anti-wavy substrate; detecting the surface temperature field of the anti-wavy substrate and cooling or preheating the substrate; and repeatedly performing arc-based additive deposition of the N+1th layer on the temperature-controlled anti-wavy substrate to complete the additive manufacturing process. This invention solves the technical problem in existing technologies where the wavy morphology between layers is not addressed, resulting in subsequent deposition layers covering and permanently remaining inside the workpiece, leading to a reduced yield. It achieves the technical effect of suppressing interlayer defects, reducing porosity by 90%, and improving internal quality.

This invention discloses a highly corrosion- and weather-resistant silicate glass material and its preparation method, comprising the following components by weight: 60-80 parts of a main network component, which forms a silicon-oxygen network framework after melting; 5-15 parts of a network-modifying component, which is distributed within the silicon-oxygen network framework; 5-12 parts of a lattice-stabilizing component; 2-8 parts of a compacting reinforcing component; and 3-10 parts of a lattice-strengthening component, which are dispersed within the silicon-oxygen network framework to form a dense silicate glass matrix. This invention can improve the weathering resistance, groundwater erosion resistance, and long-term structural stability of the glass material, and enhance the internal purity and density of the glass matrix, meeting the needs of deep underground burial and long-term information preservation applications.

The invention discloses a preparation method and application of exosomes sourced from lactobacillus reuteri and bacillus subtilis for promoting cat hair degradation, the exosomes are respectively sourced from lactobacillus reuteri and bacillus subtilis cultured under a specific fatty acid condition, lauric acid (1-8g / L) is added into a lactobacillus reuteri culture medium, palmitic acid (1-8 g / L) is added into a bacillus subtilis culture medium, and secretion of exosomes is promoted by adjusting the metabolic pathway of thalli. The exosome obtained through extraction and mixing has biological activity of promoting degradation of hair protein in cats and accelerating decomposition of hair balls, and experimental results show that the exosome can significantly reduce the formation rate of the hair balls of the cats and the content of hair in excrement and improve the health state. The invention provides a novel microbial source functional component for developing a safe, efficient and drug-residue-free pet hair ball management product, and has a good application prospect and industrialization value.

The application discloses a kind of synergic circulation pressure relief sintering regulation tungsten nickel iron binder phase distribution method, comprising the following steps: taking raw material and mixing according to mass percentage;Mixed raw material is loaded into mould, is placed in discharge plasma sintering equipment, and is sintered under vacuum or inert atmosphere condition;5~20MPa pre-pressure is applied in room temperature to first temperature interval heating process;When mould temperature rises to 1000~1280 DEG C, implement low-frequency stage formula circulation pressure relief-recompression procedure;Subsequently, the pressure is adjusted to 30~65MPa, and is kept at 1300~1500 DEG C for 2~12 min, then cooling, to get fine-grained tungsten nickel iron alloy.The application uses stage formula circulation pressure relief-recompression sintering method, promotes Ni-Fe binder phase repeated redistribution;Reduce the probability of local Ni-Fe binder phase over-wide enrichment and continuous binder phase pool formation;Increase the uniformity of Ni-Fe binder phase width distribution, improve organization consistency;It is favorable to simultaneously improve strength and plastic toughness matching.

The invention discloses kaolin-graphene composite aqueous slurry and a preparation method thereof. The preparation method comprises the following steps: S1, proportioning and mixing: mixing kaolin and amorphous carbon powder to obtain a solid mixture; s2, conductive networking and forming: adding a conductive auxiliary agent into the solid mixture obtained in the step S1, uniformly mixing, and then tabletting or granulating the mixture to obtain a to-be-treated blank; s3, ultrafast carbon heat treatment: carrying out ultrafast carbon heat treatment on two ends of the to-be-treated blank obtained in the step S2 in a negative pressure environment to obtain a composite filler; and S4, wet dispersion pulping: adding the composite filler obtained in the step S3 into a water-phase dispersion medium, and carrying out high-speed shearing dispersion, so as to obtain the kaolin-graphene composite water-based slurry. The waterborne epoxy anticorrosive coating has the advantages that stable dispersion and constructability can be realized in a waterborne system, and a multi-scale layered shielding network is constructed in a coating film, so that the barrier property and durability of the waterborne epoxy anticorrosive coating are improved.

The invention belongs to the technical field of medical material preparation, and provides CMCS-CuO NPs antibacterial latex and application thereof in a clinical implantable artificial pipeline base material in order to solve the problem that existing catheter or ureteral stent and other pipes implanted into a human body are prone to causing human body infection. The preparation method comprises the following steps: reacting carboxymethyl chitosan with copper sulfate under a hydrothermal condition to obtain a carboxymethyl chitosan composite nano copper oxide CMCS-CuO NPs antibacterial material, and then preparing the CMCS-CuO NPs antibacterial latex from the carboxymethyl chitosan composite nano copper oxide CMCS-CuO NPs antibacterial material and medical natural latex by adopting a blending method. The CMCS-CuO NPs antibacterial latex prepared by the invention is simple in process and low in cost, has an antibacterial effect on six common pathogenic bacteria in the urinary system, is high in biological safety, and can be further used as a base material to develop a novel antibacterial catheter, a ureteral stent tube and the like to be clinically used for helping to solve related infection problems.

The application relates to a scale preventing and peeling device for a cooling tower heat exchanger, which comprises a main pipe, a driving member and a spiral assembly. The spiral assembly is sleeved on the outer periphery of the main pipe, and a peeling member is arranged on the spiral assembly. One end of the peeling member is connected with the spiral assembly, and the other end extends towards the direction away from the spiral assembly and is used for abutting against the inner wall of the cooling tower heat exchanger. The outer periphery of the spiral assembly is provided with a flow guide groove which extends spirally around the axis of the spiral assembly. The driving member is connected with the main pipe, and the driving member can drive the spiral assembly to vibrate through the main pipe, so that the one end of the peeling member away from the spiral assembly rubs against the inner wall of the cooling tower heat exchanger. The scale preventing and peeling device provided by the application can not only prevent scale formation of the cooling tower heat exchanger but also remove the scale of the cooling tower heat exchanger, so as to be beneficial to guaranteeing the working efficiency of the cooling tower heat exchanger.

The invention relates to the technical field of heat dissipation, in particular to a phase-change composite heat-conducting gasket with vertical corrugated channels and a preparation method of the phase-change composite heat-conducting gasket. The invention aims to solve the problems of high hardness, poor compression compliance and large interface contact thermal resistance of the existing vertical orientation carbon-based heat conduction material and improve the actual heat dissipation efficiency of the thermal interface material in a high-power electronic device. According to the main scheme, high-heat-conductivity graphene paper or graphite paper serves as a framework base material, a composite heat conduction core with vertically-arranged bent heat conduction channels inside is constructed, and a phase-change material skin layer is combined on the surface of the composite heat conduction core. Rigid compression of the material can be converted into geometric bending deformation by utilizing an internal vertically-oriented micro-ripple structure (the section can be sine waves, sawtooth waves, trapezoidal waves or asymmetric ripples and the like), so that the compression resilience and the stress buffering capacity of the material are effectively improved; and meanwhile, the interface contact thermal resistance is effectively reduced by virtue of the self-adaptive wetting characteristic of the phase change material layer on the surface at the working temperature.

The utility model discloses a pair of rubber shoes with non-slip performance, which is characterized in that a front side water guide groove is formed in each of the inclined front part and the inclined rear part of each of two ends in the width direction of a sole part from a front concave cavity, and a rear side water guide groove is formed in each of the inclined front part and the inclined rear part of each of two ends in the width direction of the heel part from a rear concave cavity; according to the rubber shoe with the non-slip performance, the arch-shaped space provides convenience for drainage of the foot sole part and the heel part; the front concave cavity at the root position of the big toe and the rear concave cavity at the heel position prevent the shoe sole from being in direct contact with a wet and slippery basal plane, the forming probability of a water film is reduced, water in the front concave cavity and the rear concave cavity overflows in various modes, and the water in the front concave cavity and the rear concave cavity is prevented from flowing out through the front side water guide groove and the rear side water guide groove. The front longitudinal water guide groove and the rear longitudinal water guide groove can be assisted to achieve the efficient drainage effect, and meanwhile the front side water guide groove and the rear side water guide groove can increase the friction interface and improve the friction force.

The present application relates to the technical field of surgical knives, and discloses a trabeculectomy knife with adjustable knife distance, which comprises a knife handle, a knife rod connected with the knife handle, and a knife head connected at the end of the knife rod, wherein the knife head is boat-shaped, has a knife tip and two side edges, the rear sections of the two side edges are connected and the front ends thereof meet at the knife tip, the knife head has a concave cavity, the concave cavity is provided with a chevron-shaped gap for separating the knife tip, a pair of parallel first sliding grooves are arranged in the side wall of the concave cavity, an arc-shaped plate is slidably arranged in the first sliding grooves, and the two parallel edges of the arc-shaped plate are respectively clamped in the two first sliding grooves. The trabeculectomy knife can realize mode switching of the knife head and width adjustment of the side edges by single-handed holding, the big thumb can accurately control power transmission by rotating the knob, the friction fit of the threaded transmission and the wedge structure ensures smooth movement without slipping, and the operation difficulty is reduced without the need for additional instrument assistance or double-handed operation.

The utility model discloses automatic sealing and air charging device of hollow glass, including inert gas and glass body still include, exhaust port is located glass body upper end, air inlet is located glass body lower extreme, and the sealed cavity is formed between air inlet assembly and air inlet, and inert gas passes sealed cavity, air inlet and enters glass body, and air inlet assembly can block up air inlet. The utility model discloses beneficial effect is, and the sealed area will be formed between the setting of air inlet assembly and air inlet, and the sealing operation is carried out in this sealed area, even if there is time gap between the inflation completion and the blocking, but will not cause the leakage of inert gas.

The invention relates to the technical field of heat conduction materials, in particular to low-heat-resistance low-oil-permeability anti-aging thixotropic high-heat-conduction silicone grease and a preparation method thereof. According to the silicone grease, dimethyl silicone oil and vinyl-terminated polydimethylsiloxane serve as matrixes, layered interface modified spherical aluminum oxide and flaky boron nitride are compounded to serve as heat conduction filler, and hydrophobic fumed silica and a fixed-point micro-crosslinking system are added. Through a process of firstly constructing a heat-conducting network and then triggering sparse crosslinking, high heat conductivity coefficient, low interface thermal resistance, good thixotropy and long-term thermal stability are realized, the problems of oil leakage, sedimentation and aging under high filling are effectively solved, and the composite material is suitable for heat dissipation of high-power electronic devices.

The invention belongs to the technical field of welding defect detection, and particularly relates to a profile defect detection device and a defect correction method.The profile defect detection device comprises a machine body part and ultrasonic probes, the two ultrasonic probes are symmetrically arranged on the two sides of a surface welding seam of a profile to be detected through the detection device respectively, and a handle part is rotationally assembled at one end of the machine body part; the side frame parts are rotationally assembled on the two sides of the machine body part, the sliding mounting frame is assembled on one sides of the two side frame parts in a sliding mode, the assembling frame parts are detachably assembled through the sliding mounting frame, and the two ultrasonic probes are installed at the bottoms of the two assembling frame parts respectively. According to the method, the probability of detecting transverse internal defects can be increased, the defect marking function is achieved, the probe can be made to be tightly attached to the surfaces of profiles of more shapes, the probe can be prevented from colliding with irregular protrusions, and the method for correcting the multilayer repair welding is beneficial to optimizing the material strength after the internal defects are subjected to repair welding and reducing the forming probability of the repair welding defects.

The invention relates to the technical field of biology, in particular to a mouse liver cell extraction and cryopreservation method. Comprising the following steps: performing liver perfusion and digestion: performing inferior vena cava intubation on a mouse corpse, cutting open vena cava, clamping superior vena cava, performing perfusion with perfusate for 6-8 minutes, and performing circulating perfusion with digestive juice for 10-15 minutes; separating and purifying the cells: taking out the liver, tearing a liver membrane in precooling termination digestion liquid at 3-5 DEG C, filtering by a screen, collecting filtrate, performing primary centrifugation on the filtrate, supplementing a complete culture medium, then performing secondary centrifugation, collecting cell precipitates, washing with the complete culture medium for 2-3 times, performing centrifugation again, and retaining the cell precipitates at the bottom to obtain purified parenchymal liver cells; and resuspending the purified parenchymal hepatic cells by using a precooled cryopreservation solution until the final concentration is (1-2) * 10 < 7 > cells / mL, sub-packaging and cryopreserving. The method is stable in operation, high in cell obtaining rate, good in activity and high in recovery rate after cryopreservation.