24results about How to "Reduce post-processing costs" patented technology

The invention discloses a land inspection method. The method comprises the steps of performing image shooting on a key monitoring area by using an unmanned aerial vehicle to form an image data set; performing image shooting on the inspection area by using the unmanned aerial vehicle, and then inputting the deep learning model for training to form an unmanned aerial vehicle land inspection model; and preprocessing a to-be-detected land inspection image shot by the unmanned aerial vehicle, and inputting the preprocessed to-be-detected land inspection image into the unmanned aerial vehicle land inspection model for identification. The method has the advantages that the accuracy of a land inspection analysis algorithm can be improved, and the accuracy rate can reach 95%. The method can improve the inspection efficiency of the land, remarkably improves the inspection efficiency of the ownership land of the oil region, improves the inspection area, and reduces the problem that the personnel cannot reach the normal inspection due to environmental factors. Through a land inspection analysis algorithm, targets can be quickly positioned, problems can be timely found, the post-processing cost is effectively reduced, and the targets of cost reduction, throttling and income creation are achieved.

The invention belongs to the technical field of electrochemistry, and relates to a membrane-free electrochemical calcium-magnesium selective removal and recovery system and method. The membrane-free electrochemical calcium-magnesium selective removal and recovery system comprises a water inlet tank, a direct-current power supply, an electrolytic bath, a water pump and a crystallization granulation column; the anode cylinder is internally provided with a porous cathode filter element, the anode of the direct-current power supply is electrically connected with the anode, and the cathode of the direct-current power supply is electrically connected with the porous cathode filter element; a water outlet of the water inlet tank is connected with the electrolytic bath, the top in the porous cathode filter element cylinder is communicated to the bottom of the crystallization granulation column, and a water outlet is formed in the upper part of the crystallization granulation column; a membrane-free electrochemical method is adopted, OH <-> is generated by pumping the porous cathode, and the problem of membrane pollution is completely avoided; by regulating and controlling electrochemical parameters and cathode configuration, the purpose of graded calcium and magnesium removal can be achieved, and meanwhile efficient recovery of calcium and magnesium ions can be achieved by combining with a crystallization and granulation system; the membrane-free design reduces the operation and maintenance cost of the system, and calcium and magnesium ions are efficiently removed and recycled in a graded manner, so that the economical efficiency of the process is improved.

The invention discloses a stably suspended water-based diamond grinding fluid and a preparation method thereof. The grinding fluid comprises the following components in percentage by mass: 0.4-0.8% of diamond micro powder, 1-5% of a Gemini type polyether quaternary ammonium salt surfactant, 0.1-2% of a pH regulator, 1-6% of a suspending agent, 0.01-0.2% of a preservative, 20-60% of a solvent and 10-40% of deionized water, and the sum of the mass percentages is 100%. The water-based diamond grinding fluid is high in grinding rate, small in TTV and high in grinding material dispersion stability, has the advantage of being not prone to sedimentation compared with a traditional water-based diamond grinding fluid, is safer, more environmentally friendly and easy to clean compared with an oily grinding fluid, and can avoid quality and potential safety hazards caused by temperature rise due to long-time operation.

The invention discloses a real-time bearing capacity evaluation method for a water-sensitive soil stratum pile foundation, which specifically comprises the following steps of: forming a hole in the pile foundation, forming holes in the side wall and the end part of the pile hole along a pile body, burying a humidity sensor and sealing the hole; soil humidity is collected, and soil water content is analyzed; testing environmental parameters and mechanical indexes of soil bodies with different water contents to obtain cavity humidity, standard test block strength and the like of the soil bodies with different water contents, and constructing a soil body water content-environmental index and mechanical index relational expression; based on a finite element method, pile foundation bearing capacity analysis of soil around the pile under different water contents is carried out, and a soil water content-pile foundation bearing capacity calculation formula is constructed; and on the basis of a soil mass moisture content-environmental index mechanical index relational expression, data are collected through a humidity sensor, the moisture content of soil mass around the pile is calculated, and the real-time bearing capacity of the pile foundation is evaluated through a soil mass moisture content-pile foundation bearing capacity calculation formula. The method can be used for rapidly and accurately evaluating the bearing capacity of various water-sensitive soil stratum pile foundations in real time.

A dynamic statistics and result analysis system for watershed river and lake shoreline development and utilization comprises a remote sensing data acquisition module, a data preprocessing and classification module, a database construction module, a change trend analysis module, a river and lake directory and association retrieval module and an interaction management module. The data preprocessing and classification module is used for data preprocessing and statistical classification, the database construction unit is used for constructing a system database, the variation trend analysis module is used for variation trend analysis and statistical report generation, and the river and lake directory and association retrieval module is used for directory maintenance and result association. According to the dynamic statistics and result analysis system for watershed river and lake shoreline development and utilization, a remote sensing data statistical classification algorithm based on a neural network is proposed to classify remote sensing data; and a river-lake shoreline development and utilization change trend analysis algorithm based on deep learning is proposed to analyze the change trend.

An oil-ice semi-solid phase coprecipitation process for synthesizing Prussian blue positive electrode materials belongs to the field of battery technology. The process is: completely dissolving an organic metal salt in an oil-based organic solvent with a density greater than that of water; completely dissolving a metal cyanate in water, and then freezing it into a plurality of ice cubes; wherein the amount of substance of the organic metal salt is the same as the amount of substance of the metal cyanate; adding a plurality of ice cubes to the oil-based solution at a certain time interval for a plurality of times until the two react completely; after the product is stored for a period of time, washing with a certain mass fraction of an organic solution soluble in water, centrifuging, and vacuum drying to obtain a Prussian blue positive electrode material. The Prussian blue positive electrode material provided by the present invention is prepared by an oil-ice coprecipitation synthesis method in a low-water environment, which is beneficial to reducing the crystal water content of the material. Compared with other synthesis processes, the positive electrode material provided by the present invention has very few defects, uniform particles, and excellent dispersion.

The invention discloses a preparation method of all-fluid chloro-oxytetracycline, and belongs to the technical field of pharmaceutical chemicals. The method comprises the following steps: 1) adding methanol and anhydrous calcium chloride into a reactor, stirring for dissolving, cooling, adding oxytetracycline after cooling to a preset temperature, stirring, adding triethylamine, stirring for dissolving to obtain a solution A, and preserving heat for later use; 2) adding methanol and a chlorination reagent into the reactor, stirring and dissolving to obtain a solution B, and preserving heat for later use; and (3) adding methanol into the reactor, cooling, dropwise adding the solution A and the solution B, continuing cooling reaction after dropwise adding, filtering and washing a filter cake after reaction, and drying the filter cake to obtain the chloro-oxytetracycline. According to the method, the oxytetracycline is completely dissolved for the first time and then is subjected to liquid-liquid reaction, so that the problems of side reaction and incomplete reaction are greatly reduced, the production efficiency is improved, the manpower consumption can be greatly reduced, no solid waste is generated, the post-treatment cost is low, and the recovery is convenient.

This invention provides a method for preparing 1,2-propanediol and its application. The method includes: step (1): in the presence of an acidic catalyst and water, ring-opening of a first portion of propylene oxide to obtain an acid-catalyzed reaction solution containing 1,2-propanediol; step (2): in the presence of an alkaline catalyst and water, ring-opening of a second portion of propylene oxide to obtain an alkaline-catalyzed reaction solution containing 1,2-propanediol; step (3): mixing the obtained acid-catalyzed reaction solution and the alkaline-catalyzed reaction solution for a neutralization reaction to obtain a mixture containing 1,2-propanediol; wherein, the molar ratio of the first portion of propylene oxide to water in step (1) and the molar ratio of the second portion of propylene oxide to water in step (1) are each independently 1:1-5; using the method of this invention to prepare 1,2-propanediol requires only a lower water ratio to obtain a higher propylene oxide conversion rate and 1,2-propanediol content, and the wastewater volume is lower and the color is colorless after the reaction.

The invention relates to a method for synthesizing lesinurad, which comprises the following steps of: sequentially performing aldehyde-thiosemicarbazide condensation, cyclization, bromination and hydrolysis reaction on a compound 4-cyclopropyl naphthalene-1-formaldehyde as shown in a formula I serving as a raw material to obtain a compound lesinurad as shown in a formula V; according to the invention, a 1, 2, 4-triazole ring is constructed by an innovative strategy of aldehyde-thiosemicarbazide condensation-cyclization, so that tedious steps of a traditional step-by-step process are omitted, and the cyclization yield is increased from 85% to 92%; the method is mild in overall reaction condition, low in equipment damage, simple in process, green and environment-friendly, capable of ensuring continuous production of high-quality products and high in application value.

The invention discloses a preparation method of 4, 6-dichloro-2-propylthio-5-aminopyrimidine serving as an intermediate of ticagrelor. The preparation method adopts an electrochemical reduction method and is carried out in an electrolytic bath comprising a cathode chamber and an anode chamber; the cathode electrolyte is a mixed solution comprising a compound II, supporting electrolyte and acid; the anolyte adopts an acid solution; in the electrochemical reduction process, active hydrogen H * generated by cathode electrolysis acts on nitryl of the compound II, and a reduction reaction is carried out to generate a compound I; the method is mild in reaction condition, simple in equipment and easy to operate; clean electrons are directly used as a reducing agent, so that the addition of an additional catalyst or reducing agent is effectively avoided, and the compound II can be well reduced into a target product compound I; the adopted electrolytic cell can react under the conditions of higher substrate concentration and higher current density, the reaction time is short, the yield is high, and the method is suitable for industrial production. # imgabs0 #

This invention discloses a method for purifying a mixture containing polyphenylene sulfide (PPS). The method comprises the following steps: S1, washing the PPS-containing mixture with an organic solvent to obtain a first intermediate product; the first washing is performed under microwave heating at a temperature of 60-150°C; S2, washing the first intermediate product with an aqueous acid solution to obtain a second intermediate product; S3, washing the second intermediate product with water to obtain a purified PPS product; the third washing is performed under microwave heating at a temperature of 60-150°C. The purification method for the PPS-containing mixture of this invention is highly efficient and low-cost, and the obtained purified PPS product has a yellowness of no more than 7 and a salt content of less than 0.3%.

The invention provides a detection method of an intermediate 5-chloroethyl-6-chloroindole-2-ketone for ziprasidone synthesis, and belongs to the technical field of drug quality analysis and detection. According to the method, a cyano silane bonded silica gel chromatographic column is selected, acetonitrile in a certain proportion and a phosphate-triethylamine buffer solution with the pH value of 5.0 + / -0.2 are adopted as mobile phases, program gradient elution is cooperatively carried out, a main product can be effectively separated from impurities, and high separation degree and analysis sensitivity are achieved; according to the method, a diode array detector is adopted, and 2008-2022 Shimadzu Corporation LabSolutions software / similar software carried by the diode array detector is used for confirming the maximum absorption wavelength and the relative percentage content of main impurities in the main product 5-chloroethyl-6-chloroindole-2-ketone. The method provided by the invention is short in analysis time, simple in analysis operation, capable of determining whether the main product contains impurities or not, and relatively good in repeatability and adaptability.

The invention discloses a method for performing continuous flow electrochemical synthesis on rifamycin SV under a microscale. The method comprises the following steps: pumping filtrate containing the rifamycin SV into a microflow field electrochemical reactor for reaction, collecting reaction liquid, acidifying and crystallizing to obtain the rifamycin S. According to the micro-flow field electrochemical reactor, a modified graphite comb tooth structure is used as an anode, an iron comb tooth structure is used as a cathode, and the modified graphite comb tooth structure and the iron comb tooth structure intersect with each other to form an electrochemical micro-reaction channel; the surface of the modified graphite comb tooth electrode is obtained by modifying the surface of a common graphite comb tooth electrode. The method provided by the invention can avoid the use of an exogenous oxidant and an organic extraction reagent, effectively improves the reaction conversion rate, greatly shortens the reaction time, is simple to operate, is safe and stable, saves the post-treatment cost, and is greener and more efficient.

The application discloses a green synthesis method for preparing aromatic carboxylic acid based on a magnetic manganese-cobalt bimetallic oxide as a catalyst. 3 The application discloses a green synthesis method for preparing aromatic carboxylic acid based on a magnetic manganese-cobalt bimetallic oxide as a catalyst. 3 The application discloses a green synthesis method for preparing aromatic carboxylic acid based on a magnetic manganese-cobalt bimetallic oxide as a catalyst. The application discloses a green synthesis method for preparing aromatic carboxylic acid based on a magnetic manganese-cobalt bimetallic oxide as a catalyst.

The present invention relates to the technical field of ecological and environmental dredging, and in particular to a novel cross-layer ecological and environmental dredging method and system. The method comprises the following steps: performing underwater topographic survey of the construction area by measuring equipment to obtain original measurement data; preprocessing the original measurement data to obtain original measurement preprocessing data, and constructing contour maps of the original measurement preprocessing data to obtain measurement contour map data; generating a construction topographic map according to the measurement contour map data to obtain construction topographic map data; obtaining dredging target data, and marking key data according to the dredging target data and the construction topographic map data to obtain construction topographic map marking data; obtaining ship size data, and generating an operation map according to the ship size data and the construction topographic map marking data to obtain cross-layer ecological and environmental dredging operation map data. The present invention improves the accuracy and applicability of cross-layer ecological and environmental dredging operations.

The invention provides a detection method for ziprasidone synthesis intermediate 3-(1-piperazinyl)-1,2-benzisothiazole hydrochloride, belonging to the technical field of drug quality analysis and detection. The invention selects acetonitrile and triethylamine-containing aqueous solution in a certain proportion as mobile phases, performs programmed gradient elution in coordination, and improves separation degree and analytical sensitivity; a diode array detector is adopted, and the 2008-2022Shimadzu Corporation LabSolutions software / similar software carried by the diode array detector is used to confirm the relative quantification of main impurities in the main product 3-(1-piperazinyl)-1,2-benzisothiazole hydrochloride; and the method provided by the invention has short analysis time, simple analysis operation and good repeatability and adaptability.

This invention discloses a ketoisomerase mutant, its preparation method, and its applications, relating to the field of biotechnology. The ketoisomerase mutant is obtained by mutating or combining mutations at positions 65, 136, and 190 of the amino acid sequence of the ketoisomerase shown in SEQ ID NO.1. Through recombinant bacterial construction, screening for efficient ketoisomerases via fermentation, and subsequent biotransformation and purification, 1-keto-D-chiral inositol was prepared. This invention lays the foundation for the study of the properties of 1-keto-D-chiral inositol and has significant application value.

The utility model belongs to the technical field of flow batteries, and particularly relates to a gas circulation system of a flow battery. The flow battery gas circulation system comprises a positive electrode liquid storage tank, a negative electrode liquid storage tank, a gas inlet pipeline, a gas exhaust pipeline, a gas pressure balance pipeline and a gas transfer device, the upstream end of the air inlet pipeline is positioned above the liquid level of the positive electrode liquid storage tank; the downstream end of the gas inlet pipeline is communicated with the inlet of the gas transfer device; the outlet of the gas transfer device is communicated with the upstream end of the exhaust pipeline; the downstream end of the exhaust pipeline is located below the liquid level of the negative electrode liquid storage tank. And two ends of the air pressure balance pipeline are respectively communicated to positions above the liquid levels of the positive electrode liquid storage tank and the negative electrode liquid storage tank. The gas transfer and reactive gas absorption process is realized, volatile gas and toxic waste gas can be quickly and effectively absorbed, the pressure balance of the positive and negative electrode liquid storage tanks is maintained, the change of active components of the electrolyte during operation is avoided, and the safety and high efficiency of long-time operation of the flow battery are maintained.

The invention relates to the technical field of image recognition and analysis, solves the technical problems that implicit spatial dependence is difficult to capture, missing report group conflicts are caused, and recognition of progressive abnormal behaviors is prone to delay or misjudgment in the prior art, and particularly relates to a security and protection monitoring comprehensive early warning analysis system and method based on machine learning. The method comprises the following steps: S1, collecting an original video stream monitored in a campus, obtaining campus Internet of Things sensor data, and preprocessing the original video stream and the Internet of Things sensor data to obtain time-space standardized data. According to the method, spatial configuration and time evolution can be explicitly coded, information splitting can be avoided, long-distance and many-to-many complex dependence can be captured in a cross-frame mode, the understanding accuracy of group abnormal behaviors is improved, robustness is greatly improved, and the joint analysis capacity of individual behavior and group interaction is remarkably improved.

The present invention belongs to the technical field of cutting fluids, and specifically relates to a method for preparing a graphene-based nanofluid cutting fluid. The present invention selects a dispersant and a dispersing aid of a specific structure, adds graphite or expanded graphite to a dispersant solution, and then performs hydroxyl radical stripping, and then centrifugal separation to obtain a uniform and stable graphene-based nanofluid cutting fluid. The separated solid is reused for the next production; the graphene-based nanofluid prepared by the method of the present invention has the remarkable characteristics of good dispersion stability, does not contain additives necessary for traditional lubricating oils, and has little environmental pollution effect. In addition, the preparation process is simple, the cost is low, and the service life is long; the product of the present invention exhibits comprehensive effects such as significant drag reduction, extended tool life, improved workpiece product quality, and significantly reduced post-processing costs, and is suitable for use in various types of metals and alloy materials under different cutting conditions.

The invention discloses a continuous preparation and purification method of high-purity S-configuration glassine, and the method comprises the following steps: introducing a mixed aqueous solution of D-xylose, alkali and acetylacetone into a micro-channel continuous device, controlling the reaction temperature and flow velocity to obtain a reaction intermediate 1-C-(beta-D-xylopyranyl)-acetone, and carrying out continuous preparation and purification on the reaction intermediate 1-C-(beta-D-xylopyranyl)-acetone to obtain the high-purity S-configuration glassine. 1-C-(beta-D-xylopyranosyl)-acetone, a chiral Ir catalyst, sodium acetate and hydrogen are introduced into a micro-channel continuous device by controlling the flow rate, the reaction temperature, pressure and retention time are controlled, continuous hydrogenation reduction is carried out, high-purity S-configuration glassine is obtained through desalination, decoloration and recrystallization, a nuclear magnetic hydrogen spectrum shows that the S-to-R configuration ratio is 100: 0, the S-configuration glassine is 100%, and the purity of the S-configuration glassine is 100%. The R-configuration glass color is 0%, and the HPLC detection purity is greater than 99%. The continuous flow preparation method disclosed by the invention is high in purity, green, safe and efficient, and has a good market application prospect.

The invention relates to an acid-base-rich site composite hybrid structure catalyst and a preparation method and application thereof, and belongs to the technical field of polyester chemical recovery and solid catalysis. The invention provides an acid-base-rich site composite hybrid structure catalyst which comprises calcium carbonate and calcium titanate, the mass ratio of the calcium carbonate to the calcium titanate is (1-21): 9, and the catalyst is a mesoporous material with the pore diameter of 2-50 nm. The catalyst has both Lewis acid site and alkaline site and contains detectable oxygen vacancy, the mesoporous structure and the high specific surface area of the catalyst are beneficial for improving diffusion and site utilization rate of macromolecular substrates, the catalyst shows excellent alcoholysis activity to polyester materials at proper temperature, high-selectivity recovery of monomers is achieved, and the catalyst can be used for continuous reaction of a fixed bed and can be applied to industrial production. The excellent continuous use stability is realized.

This invention relates to the field of laser cutting technology and discloses a laser cutting device for copper plates used in copper crafts processing. The device includes a laser cutting machine housing and a laser cutting head. Y-axis linear motors are mounted on both sides of the top of the laser cutting machine housing, and a portal frame is positioned between the Y-axis linear motors. An X-axis linear motor is fixed to one side of the top beam of the portal frame. The laser cutting head is fixed to one end of the slide. A fixing ring is fixed to the lower half of the outer wall of the laser cutting head, and an external gear ring is fixed to the outside of the fixing ring. This invention achieves a 360° adjustable preheating and rapid cooling mechanism around the laser cutting head, allowing it to follow the cutting direction of the laser cutting head in real time. This ensures that the electric heating plate always precisely covers the area to be cut, and the hollow water-cooled housing always precisely covers the cutting area, achieving seamless integration of preheating, cutting, and rapid cooling. This maximizes the effects of preheating and rapid cooling, further improving cutting accuracy and cut quality.

The invention relates to a method for preparing a low-molecular-weight propylene copolymer and the low-molecular-weight propylene copolymer prepared by the method. The preparation method has the advantages of high polymerization activity, mild polymerization conditions, easiness in operation, high volatile component removal efficiency and extremely low metal content in the obtained polymer. The low-molecular-weight propylene copolymer provided by the invention is narrow in molecular mass distribution, low in density, wide in melting point and melt viscosity regulation range, suitable for processing technologies at various different temperatures, high in comonomer insertion rate, and more excellent in resin compatibility compared with a homopolymer; and the dispersing agent can be used as a dispersing agent, a modifying agent or a processing aid, and is beneficial to improving dispersion uniformity, precipitation uniformity and processing flowability.