18results about How to "Reduce trimming" patented technology

The invention discloses a preparation method of a carbon dot nano-enzyme, which comprises the following steps: dissolving oxalic acid, polyethyleneimine and ferric nitrate in ultrapure water, heating, mixing and reacting, cooling to room temperature, centrifuging, filtering, dialyzing, and taking supernate to obtain the carbon dot nano-enzyme. The prepared oxalic acid carbon dot nano-enzyme is matched with acetylcholin esterase, acetylcholine, 3, 3 ', 5, 5'-tetramethyl benzidine and H2O2 to construct a colorimetric and fluorescent dual-mode detection method for glyphosate in fruits and vegetables. The oxalic acid carbon dot nano-enzyme is prepared by doping ferric nitrate and tetraethylenepentamine into oxalic acid serving as a precursor, the oxalic acid carbon dot nano-enzyme has excellent peroxidase-like activity, a colorimetric and fluorescent dual-mode detection method of glyphosate is constructed through the oxalic acid carbon dot nano-enzyme, dual-mode detection results can be mutually verified, and the detection result is accurate. And the accuracy and the reliability of a detection result are remarkably improved.

The utility model discloses a plating bath device for improving deep plating ability, which comprises a plating bath body, guide rail assemblies, an anode assembly, a cathode assembly and a bath solution circulating device, the guide rail assemblies are fixedly connected to the edges of the two sides of the upper end of the plating bath body respectively, and an adjusting assembly is fixedly mounted between the two guide rail assemblies. The adjusting assembly is slidably connected in the plating tank body, an anode assembly is fixedly connected to the adjusting assembly, the anode assembly is composed of a plurality of anode plates, a cathode assembly is arranged on the inner wall, opposite to the anode assembly, of the plating tank body, and tank liquid circulating devices are connected to the two sides of the plating tank body. The utility model aims to provide the electroplating bath device which is good in electroplating effect, high in working efficiency and strong in applicability.

The invention belongs to the technical field of CO2 geological sequestration of unconventional reservoirs, and particularly relates to a method for enhancing CO2 sequestration of an exhausted shale oil and gas reservoir. The positive electrode and the negative electrode are placed in the injection well and the production well respectively, in the electrifying process, the positive electrode generates a strong oxidation effect under the action of a catalyst, no catalyst exists on the surface of the negative electrode, and a strong electrocatalytic reduction reaction cannot occur; meanwhile, a mode of intermittently supplying power and exchanging a power supply and an electrode is adopted to promote the left area and the right area of the whole reservoir to generate strong electrocatalytic oxidation, and CO2 in the whole area is promoted to be firmly adsorbed in the reservoir and cannot escape, so that the carbon sequestration effect is realized; according to the method, the storage efficiency of CO2 can be improved, the recovery efficiency of the oil reservoir is improved, energy safety is guaranteed, and emission of greenhouse gas is reduced.

The invention discloses a method for manufacturing an intermediate-diameter-reduced external thread based on a standard metric external thread. The method comprises the steps that a finished bolt meeting the standard metric thread standard serves as a standard bolt to be used for manufacturing an intermediate-diameter-reduced bolt; according to the fact that the pitch diameter of the thread is equivalent to the diameter of the thread rolling blank, the diameter d 'P = dP-deltad2 of the thread rolling blank of the bolt with the reduced pitch diameter is obtained through calculation; calculating the difference value delta VP between the volume V1 of the thread rolling blank of the standard bolt and the volume V2 of the thread rolling blank of the reduced pitch-diameter bolt according to # imgabs0 #; the thread cutting depth delta d is calculated according to delta VP = delta V = F (delta d); the thread cutting depth delta d serves as the turning depth, the original thread outer circle of the standard bolt is turned, and a semi-finished product bolt is obtained; and performing thread rolling on the semi-finished product bolt according to the original thread lines on the semi-finished product bolt, and obtaining the bolt with the reduced pitch diameter after surface treatment is completed. The small-pitch-diameter bolt can be manufactured and machined through the finished bolt, the production process is simplified, and the production efficiency is improved.

The invention provides an electrolyte of a high-safety sodium ion battery, which comprises the following components: a solvent which takes propylene carbonate (PC) as a main solvent and contains ethylene carbonate (EC) and dimethyl carbonate (DMC); the coalescing agent is fluoroethylene carbonate (FEC) and 1, 3-propane sultone (1, 3-PS); conducting salt: sodium perchlorate (NaClO4); additives: acesulfame sodium and a proper amount of sodium nitrate. The sodium ion battery provided by the invention has more excellent properties.

The application discloses a ship body segmentation splicing method based on a laser point cloud device, and comprises the following steps: acquiring X partial point cloud data of a ship body segmentation; splicing the X partial point cloud data by using the spatial overlapping part and the same features of the point cloud data; deleting the point cloud data of a part which is not needed to be compared with a ship body segmentation design model, and reserving the ship body segmentation point cloud; generating a target point by the key position of the ship body segmentation point cloud data, performing coordinate conversion on the coordinates of the target point and the corresponding position of the ship body segmentation design model, converting the coordinate system of the ship body segmentation point cloud data into the same as the theoretical coordinate system of the ship body segmentation design model; outputting the required point cloud format, saving the complete ship body segmentation point cloud data, and realizing the ship body segmentation splicing. The precision and efficiency of the segmentation splicing directly determine the linear smoothness, structural strength, assembly stress, construction period and cost of the final ship body, and is one of the core key processes of ship construction.

The application relates to an antibacterial agent and a preparation method thereof, a powder coating, a product with antibacterial function and a preparation method thereof. The antibacterial agent comprises an inorganic carrier and silver ions, copper ions and third metal ions supported on the inorganic carrier; the third metal ions comprise one or more of nickel ions, titanium ions, manganese ions and zinc ions; the content of the silver ions is greater than the content of the copper ions and greater than the content of the third metal ions. In the antibacterial agent, the silver ions play a main antibacterial role, the copper ions are used for reducing the silver ions, the state of the silver ions is protected, the third metal ions increase the number of additional exchangeable cations, the release speed of the silver ions is delayed, and the copper ions are matched to improve the durability of the antibacterial effect of the silver ions.

The application discloses an active defense method, device and equipment for diffusion speech conversion and a medium, and relates to the technical field of speech security. The active defense method comprises the following steps: obtaining source speech and reference speech, introducing a constrained protection disturbance into the reference speech, constructing protected speech, and ensuring that the protection disturbance satisfies a disturbance imperceptibility constraint. The source speech and the protected speech are input into a speech conversion model with the reference speech as a speaker condition, content information analysis, speaker condition constraint acoustic generation and waveform synthesis are completed by the speech conversion model, and a protection generated speech is output. A joint loss function is constructed based on speaker embedding representations of the protection generated speech and the reference speech, gradients of a current disturbance position and a predicted midpoint position are calculated according to the joint loss function and are fused to obtain an update direction, the protection disturbance is iteratively optimized, and projection or clipping is performed to satisfy the disturbance imperceptibility constraint. Finally, the protected speech is output.

The present invention introduces a method for manufacturing an oversized aluminum foil for a radiator, and the specific steps are: smelting-casting-rough rolling-edge cutting-finishing-annealing; during smelting, solid materials and electrolytic aluminum liquid are added, and the temperature of the solid materials in the furnace is raised to not less than 720°C by stewing the furnace without ignition; after slagging, the alloy composition in the furnace is adjusted, and after inert gas refining, it is poured into a heat preservation furnace for casting and rolling; three rough rolling passes; and four finishing passes. The present invention increases the proportion of electrolytic aluminum liquid and reduces the proportion of solid materials, adopts a stewing method, reduces energy consumption and burning loss, saves energy and reduces emissions, and reduces production costs; adjusts the alloy composition ratio and refining additives in the furnace, and adopts nitrogen blowing to effectively remove oxides and impurities in the aluminum liquid to ensure the purification effect, so as to increase the width of the cast coil and reduce the amount of trimming; by controlling the rolling tension, the edge is prevented from being easily warped due to poor cooling of the edge; reduces the number of production passes, shortens the production time, and improves the production efficiency of the wide-width rolling mill.

The present application relates to the nuclear technology field, specifically to a method for separating thorium from a thorium and lanthanum mixture. The method comprises the following steps: in a three-electrode system, pulse constant current controlled potential electrolysis is performed on a molten salt system containing mixed ions of thorium and lanthanum series elements, and the deposition rate difference of thorium and lanthanum series element ions during pulse constant current electrolysis and the electrolytic reaction limitation of the control potential on the lanthanum series element ions are utilized to achieve efficient separation of thorium from the thorium and lanthanum mixture. The molten salt system containing mixed ions of thorium and lanthanum series elements is obtained by adding the thorium and lanthanum mixture into a chloride molten salt, mixing uniformly, and passing in chlorine gas mixture to chlorinate the mixture and dissolve it into the chloride molten salt. The method has the advantages of simple process, strong radiation resistance, no additional radioactive waste, and low cost, and is suitable for industrial application of molten salt reactor spent fuel reprocessing.

This invention discloses a bismuth-copper bimetallic coordination nanomaterial, its preparation method, and its applications, belonging to the technical field of biofunctional materials. The prepared bismuth-copper bimetallic coordination nanomaterial can efficiently generate reactive oxygen species (ROS) under ultrasonic stimulation, initiating the sonodynamic therapy (SDT) process; the Cu in this material... 2+ The weakly acidic environment of the tumor microenvironment can also trigger a Fenton-like reaction, generating cytotoxic hydroxyl radicals (•OH) and oxygen in situ, thus initiating the chemokinetic therapy (CDT) process. Through the synergistic effect of sonodynamic therapy (SDT) and chemokinetic therapy (CDT), they jointly inhibit cancer cell proliferation and promote T cell generation.

The application provides a method for preparing lithium iron phosphate from iron hydroxyl phosphate and ferrous oxalate. The ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution and ammonia water are sequentially added to the solution to form a mixed slurry. The mixed slurry is heated and kept warm, and then washed with water and filtered under pressure to form an iron hydroxyl phosphate precursor with different iron and phosphorus ratios. The iron hydroxyl phosphate precursor is dried by flash evaporation and sintered at high temperature and then crushed to obtain an iron hydroxyl phosphate precursor with different iron and phosphorus ratios and different specific surface areas. The iron hydroxyl phosphate precursor is crushed and mixed to obtain an iron hydroxyl phosphate product. The high-iron and low-iron ratio iron hydroxyl phosphate is mixed with ferrous oxalate, lithium phosphate, lithium carbonate and ammonium dihydrogen phosphate in a certain proportion, and a carbon source and an additive are added to form a mixture. The mixture is subjected to a series of processes such as ball milling, sand milling, spray drying, sintering, crushing, screening, batching and packaging to obtain a lithium iron phosphate product.

This utility model relates to the field of suspension technology and provides a multi-link front air suspension for heavy-duty trucks. It includes an axle, a frame, two shock absorbers, a stabilizer bar, and two air springs. The stabilizer bar has a U-shaped structure, with each end of the stabilizer bar's crossbar connected to an airbag base via a bracket assembly. The airbag base has a Y-shaped structure, including a thrust rod portion and an airbag portion. The airbag portion is positioned above the stabilizer bar, and an air spring is fixed to the top of the airbag portion via an airbag disc. The thrust rod portion has a concave arc-shaped structure and is located on the side closest to the stabilizer bar's suspension rod. The thrust rod portion of each airbag base is connected to a longitudinal thrust rod front bracket via two parallel longitudinal thrust rods. The top and upper sidewall of the longitudinal thrust rod front bracket are fixed to the frame with bolts. This design enables the structural components to work synergistically, achieving coordinated transmission of multi-directional forces, dispersing the load on the suspension system, and reducing anti-roll forces.

The present application relates to a kind of rock platform pre-reinforcement blasting construction method, comprising the following steps: obtaining rock platform pre-reinforcement parameters, and based on rock platform pre-reinforcement parameters, establish rock platform pre-reinforcement model;Based on rock platform pre-reinforcement model, excavate construction area to form working face;First hole site is drilled in working face, which penetrates reserved protective layer and extends into rock platform pre-set depth;Stop slurry isolation device is set at free section, and anchor rod is installed at first hole site, and free section of anchor rod is located in reserved protective layer;Grouting is carried out at anchoring section of anchor rod, forming grouting anchoring section, and anchoring section of anchor rod is located in rock platform;Reserved protective layer is blasted;After blasting, reserved protective layer is cleaned, and rock platform is accepted.The above-mentioned rock platform pre-reinforcement blasting construction method improves the forming face rock platform blast resistance from inside, effectively reduces the secondary damage of protective layer blasting, and effectively maintains the integrity and flatness of profile after blasting.

According to the structure of the hollow rivet, an equal-weight conversion method is adopted to construct an unfolded blank circular ring, an extrusion male die and extrusion female die tool structure needed by cold extrusion forming is designed, a formula is established to quantitatively design the structures of all parts of the female and male die forming surfaces, and by limiting the height of the male die body, the near-net cold extrusion forming die for the hollow rivet is obtained. The die assembly gap is adjusted, the thickness of a part flange is accurately controlled, through control over the gap between the male die extrusion ejector rod and the female die ejector rod groove, the phenomenon that a blank flows along the gap between the male die and the female die to generate flashes and the like is prevented, net size forming is achieved, the rejection rate in the production process is reduced, and the production efficiency of hollow rivets is improved.

This invention discloses a method for improving the metal yield of cast billets, relating to the technical field of continuous casting control methods. Specifically, it includes determining the range of width contraction coefficients for various steel grades, selecting the maximum and minimum values ​​among the width contraction coefficients, calculating the lower opening dimension of the crystallizer based on the minimum width contraction coefficient, calculating the insufficient width and length of the cast billet based on the maximum and minimum width contraction coefficients and the original length of the cast billet, and then determining the final width and final length of the cast billet according to the principle of width reduction and length adjustment. The final dimensions determined in this way not only solve the problem of high continuous casting consumption caused by the large variety of mixed steel grades in continuous casting and the lack of online fine-tuning width adjustment functions in the crystallizers of most steel plants, making it impossible to accurately control the width of the cold-cast billet, but also improve the metal yield of continuous casting and reduce steel production cost losses.

The invention relates to the technical field of partial discharge detection, and discloses a multi-band signal filtering method and system for partial discharge monitoring equipment, and the method comprises the steps: firstly, setting a corresponding first filtering channel according to an obtained first simulation instruction, obtaining a first simulation impedance and a first simulation capacitive reactance through matching, and configuring the channel according to the first simulation impedance and the first simulation capacitive reactance; and then controlling the filter circuit to filter the corresponding first analog signal received by the detection terminal, and outputting a first filter signal. Then, after a second simulation instruction is obtained, the first filtering channel is closed, discharging lasts for a preset first duration, then the first filtering channel is configured to be a second filtering channel corresponding to the second simulation instruction, second simulation impedance and second simulation capacitive reactance are obtained through matching in the configuration process, and then configuration is completed in sequence; and finally, controlling the second filtering channel to filter the corresponding second analog signal received by the detection terminal, and outputting a second filtering signal. In this way, filtering processing of multi-band signals is achieved. According to the invention, software can be used for dynamic control to realize dynamic filtering.

This invention discloses a method, apparatus, and system for voltage modulation of a switched reluctance motor based on effective vectors, belonging to the field of motor drive control, including: obtaining the rotating voltage component u of the switched reluctance motor corresponding to a voltage reference value during the current switching cycle. αβ and zero-sequence voltage component u z ; for u αβ By decomposition, the rotating voltage components U of the two converters in the open-winding motor driver are obtained. αβ1 and U αβ2 And calculate the action time T' of the first effective vector and the second effective vector of the two converters respectively. x1 T' y1 T' x2 and T' y2 This enables the two converters to achieve u z The modulation, and the rotating voltage components are U αβ1 and U αβ2 According to T' x1 T' y1 T' x2 and T' y2 The duty cycle of each bridge arm in each converter is calculated, and the remaining time is filled using a single zero vector; the switching signal of each bridge arm in both converters is determined based on the duty cycle. This invention achieves modulation of both rotating voltage components and zero-sequence voltage components simultaneously through effective vector allocation, thereby reducing the number of switching operations within each switching cycle.