32results about How to "Good selection" patented technology

The invention relates to system conceived and designed to identify pieces of fruit, especially citrus fruits, affected by any amount of rot and to determine the automatic expulsion of these pieces from the conveyor moving them through the installation. The system comprises illuminating the fruits with UV-A band light in a computer vision unit, and capturing images of the illuminated fruits by means of a camera to send them to a general control member in order to detect fluorescences associated to the rot effect. The identified fruit is automatically expelled from the conveyor in an expulsion unit, the position of the defective fruit being determined with the aid of an encoder associated to the conveyor. The general control member is a PC type computer, equipped with specific application software.

The invention discloses an electrochemical paracetamol molecular imprinting transducer and a manufacturing method thereof. According to the transducer, a molecular imprinting technology and an electric analysis and chemical detection technology are combined. Paracetamol is taked as a template molecule, acrylamide is taken as a functional monomer, special resource rosin of Guangx is combined with paracetamol and acrylamide, and maleated rosin ethylene glycol dimethacrylate compounded by the rosin serving as a raw material is used as a cross-linking agent. The electrochemical paracetamol molecular imprinting transducer can be used for measuring the content of paracetamol, and has favorable selecting recognition performance. The electrochemical analysis method for detecting the paracetamol, which is provided by the invention, is simple and practical, and meanwhile, can be used for overcoming the defect of the complexity of the traditional method.

The invention discloses a tripolycyanamide molecular imprinting electrochemical sensor and a preparation method thereof. A molecular imprinting technology and an electro-analysis chemical detection technology are combined, the tripolycyanamide serves as template molecules, methacrylic acid serves as functional monomer, rosin which is the featured resource of Guangxi is used, and maleated rosin ethylene glycol diacrylate synthesized by using the rosin as the raw material serves as a cross-linking agent. The tripolycyanamide molecular imprinting electrochemical sensor can be used for measuring the content of the tripolycyanamide, and has high selection identifiability; and on the basis of the sensor, an electrochemical analyzing method for measuring the tripolycyanamide is simple and practical, and the shortcoming of complexity of the conventional method is overcome.

The invention provides a quality improvement and impurity reduction ore dressing method of ferromagnetic minerals. The method is characterized in that the ferromagnetic minerals are cleaned, and the cleaning process comprises the following steps: 1, adding a flotation agent to crude concentrates, and carrying out size mixing, wherein the weight of ores with the granularity of 0.07-4mm in the crude concentrates is 80-90% of the total weight of the crude concentrates, and the flotation agent comprises a collector and an inhibitor; and 2, adding a material obtained in step 1 into a floating agglomeration electromagnetic cleaning device, and controlling the magnetic field intensity of the floating agglomeration electromagnetic cleaning device to be 11.94-63.69kA / m, the magnetic field transformation period to be 2-6s and the rising water flow speed to be 2-6cm / s. The method allows high-quality ferromagnetic mineral products to be obtained, greatly reduces the content of impurities, greatly shortens the ore dressing process of the ferromagnetic minerals, and has huge market economic benefit.

The invention belongs to the technical field of environment-friendly functional materials and particularly relates to a method for preparing a composite cellulose porous imprinting adsorbent. The method comprises the following steps: firstly extracting nano-crystalline celluloses (NCCs) from medicinal degreasing cotton by virtue of an acid hydrolysis method, adding 4-nitrophenol (4-NP) serving as a template molecule, acrylamide (AM) serving as a functional monomer, N,N'-methylene-bisacrylamide (MBAM) serving as a crosslinker, Tween 85 serving as a surfactant and potassium persulfate serving as an initiator into an NCCs colloidal suspension serving as a water phase and liquid paraffin serving as an oil phase, preparing oil-in-water (o / w) Pickering high internal phase emulsions (HIPEs) and carrying out thermally initiated polymerization to prepare the composite cellulose porous imprinting adsorbent, wherein the adsorbent is used for selectively identifying and adsorbing 4-NP in the solution. The adsorption test results show that the imprinting adsorbent prepared by the invention has good adsorption capacity, relatively rapid dynamic performance and selective identification performance on 4-NP.

The invention relates to a preparation method of a microzyme magnetic blotting composite microsphere adsorbent, and belongs to the technical field of environmentally-friendly functional material preparation. The method comprises the following steps: preparing ferriferrous oxide nanoparticles through a coprecipitation process, carrying out hydrophobic modification on the surface of the nanoparticles, preparing a stable Pickering emulsion with an oleic acid modified microzyme aqueous solution as a water phase, cyhalothrin as a template molecule, methacrylic acid and 4-vinylpyridine as functional monomers, ethylene glycol dimethacrylate as a cross-linking agent, dimethyl 2,2'-azobis(2-methylpropionate) as an initiator and hydrophobic Fe3O4 as an oil phase, and carrying out thermal-initiated polymerization to prepare the microzyme magnetic blotting composite microsphere adsorbent. Blotting microspheres obtained in the invention have a good magnetic stability, and the adsorption balance, the dynamics and the selection identification performance of the adsorbent are researched through static state adsorption experiments. Results show that the blotting adsorbent prepared in the invention has a good adsorption capacity, fast adsorption kinetics, and has a selection identification performance on LC.

The invention discloses an aspirin molecule imprint electrochemical sensor and a preparation method thereof. The molecule imprint technology is combined with the electroanalysis chemical detection technology for use, aspirin serves as template molecules, acrylamide serves as functional monomers, and rosin, one of the characteristic resources in Guangxi province, is tightly combined and serves as the raw material for synthetizing maleated rosin acrylic acid glycol ester which is used as a cross linker. The aspirin molecule imprint electrochemical sensor can be used for measuring content of aspirin, and shows better selective identification performance; and an electrochemical analysis method for measuring aspirin based on the sensor is simple and practical, and overcomes the defect that the traditional method is complicated.

The invention relates to the technical field of preparation of an environmental material, in particular to a yeast surface atom transfer imprinted adsorbent, and a preparation method and application thereof. The preparation method comprises the following steps of: through the atom transfer radical polymerization process, firstly, loading an initiator into a yeast surface to obtain a matrix material with the initiator; and then preparing the yeast surface imprinted adsorbent by using cefalexin as template molecules, using methacrylic acid (MAA) as a functional monomer, using ethylene glycol dimethacrylate (EGDMA) as a cross linking agent and using CuCl as a catalyst. The spherical imprinted adsorbent has obvious thermal and magnetic stability. The research on the effect between the template molecules and the functional monomer by ultraviolet rays shows that the acting force exists. A static adsorption experiment is used for researching the adsorption equilibrium, the dynamics and the selective recognition performance of the prepared imprinted adsorbent. A result shows that the yeast surface imprinted adsorbent obtained by utilizing the preparation method disclosed by the invention has high adsorption capacity, high-speed adsorption dynamics property and obvious cefalexin molecular recognition performance.

The invention brings forward an image fuzzy identification method of a standard constant temperature bath glass thermometer. The method comprises the following main steps: acquiring a fuzzy image of the thermometer, converting the acquired fuzzy image into a gray-scale map, performing threshold processing on the gray-scale map; performing rotation correction on the fuzzy image after the threshold processing, and obtaining a liquid column position of the thermometer by use of a projection method; segmenting the fuzzy image after the rotation correction to obtain a graduation line subarea, a liquid column subarea and an indication character subarea; performing morphological processing on the subareas to obtain pixel coordinates of a graduation line and a liquid column fixed point; and performing character search on the indication character subarea to identity characters and obtain temperature information of the graduation line, and finally obtaining an indication temperature of the thermometer in the acquired fuzzy image. According to the invention, thermometer characters are identified by use of a fuzzy closeness algorithm, fuzzy closeness digital repair is performed on incomplete digits, correct identification of incomplete characters is realized, the correct rate of the identification is about 96%, and the thermometer reading accuracy can reach 95%.

The invention discloses a methyl-parathion molecularly-imprinted electrochemical sensor and a preparation method thereof. The sensor comprises a glassy carbon electrode, wherein the glassy carbon electrode is covered with a carboxyl graphene-nanogold composite coating, and molecularly-imprinted holes corresponding to methyl-parathion molecules are formed in the carboxyl graphene-nanogold composite coating. The preparation method comprises four steps as follows: synthetizing a carboxyl graphene-nanogold composite; using the carboxyl graphene-nanogold composite to modify the glassy carbon electrode; forming a methyl-parathion molecularly-imprinted template; removing methyl-parathion molecularly-imprinted template molecules. Through an electrochemical performance test, the sensitivity of the methyl-parathion molecularly-imprinted electrochemical sensor is high. A methyl-parathion solution with the concentration being 4*10-8 mol.L<-1> is compared with a methyl-parathion solution with the concentration being 0, current curves are obviously changed, and thus micro trace detection on the low-concentration methyl parathion is realized.

The invention relates to wheat seed selection equipment capable of rejecting deteriorated grains. The wheat seed selection equipment comprises a bottom plate, a sorting device and a feeding frame, wherein the sorting device is mounted at the upper end of the bottom plate, an opening groove is formed in the upper end of the sorting device, and the feeding frame is mounted at the opening groove andadopts a trapezoid structure. The wheat seed selection equipment can solve the problems that when selecting and processing wheat seeds, existing equipment has poor selection effects on the wheat seedsand is unable to effectively reject and filter out the deteriorated grains in the wheat seeds, as a result, a larger quantity of impurities are still mixed in the wheat seeds and the survival rate ofthe wheat seeds is affected, and besides, when selecting and processing the wheat seeds, the existing equipment is unable to reject lighter impurities in the wheat seeds and rejected dust and impurities diffuse in the environment easily to affect the environmental quality.

The invention discloses a fluorescent probe for formaldehyde detection and a preparation method and application thereof. The novel fluorescent probe is called HDBC for short, and the structural formula of the novel fluorescent probe is shown as the following formula I in the specification. The novel fluorescent probe HDBC has good response to formaldehyde and can be used for rapid detection of trace formaldehyde in the environment and organisms. The probe is simple in synthesis process and high in yield, and the used reagents are cheap and easy to obtain; the prepared probe is sensitive to formaldehyde response, and the defects that an existing formaldehyde fluorescent probe is complex in synthesis process, tedious in step, expensive in used reagent, insensitive to response and the like are overcome. Therefore, the formaldehyde probe HDBC has an application prospect.

The invention discloses a resin sand winnowing machine. The resin sand winnowing machine comprises a primary ventilation pipe, a secondary ventilation pipe, a primary baffle plate, a primary drop plate, a primary adjusting plate, a primary ash receiving hopper, a secondary baffle plate, a secondary drop plate, a secondary adjusting plate, a secondary ash receiving plate, a sand receiving hopper, an ash outlet and a sand outlet, wherein the primary ventilation pipe is arranged on the left external upper side of the resin sand winnowing machine; the secondary ventilation pipe is arranged just below the primary ventilation pipe; the primary baffle plate is arranged above the primary ash receiving hopper; the secondary ash receiving hopper is arranged below the primary ash receiving hopper; the ash outlet is formed at the lower part of the primary ash receiving hopper; the secondary baffle plate is arranged above the secondary ash receiving hopper; the horizontally arranged primary drop plate and the vertically arranged primary adjusting plate are arranged at the right side of the primary baffle plate; and the horizontally arranged secondary drop plate and the vertically arranged secondary adjusting plate are arranged at the right side of the secondary baffle plate. The resin sand winnowing machine provided by the invention adopts a double-stage ventilation winnowing structure, thus, the ventilation wind force is strong, the winnowing effect is good, and the problem that sand and dust are hard to separate is solved completely.

The embodiment of the invention relates to the field of natural language processing, and discloses a named entity recognition method and system, electronic equipment and a storage medium. The method comprises the following setps: obtaining the first lable sequence and the second lable sequence, wherein the first label sequence is a result of identifying the text by using a word vector, and the second label sequence is a result of identifying the text by using a word vector; and selecting a tag sequence with higher text recognition accuracy in the first tag sequence and the second tag sequenceas an output tag sequence. According to the method, the text is represented by the word vector and the word vector respectively, the first label sequence and the second label sequence are generated, and the label sequence with higher recognition accuracy in the first label sequence and the second label sequence is selected as the output label sequence. Because the word vector mode and the character vector mode respectively have better recognition effects on certain sentence patterns, the recognition effect of the Chinese named entity can be improved to a certain extent by combining the advantages of the word vector mode and the character vector mode for representing the text.

The invention discloses a method used for preparing a diclofenac sodium surface molecular imprinting polymer in water phase taking ZIF-67 as catalyst. According to the method, metal organic frameworkmaterial ZIF-67 is taken as a carrier, water is taken as a pore forming agent and a solvent, diclofenac sodium is taken as a template molecule, 1-allyl-3-vinyl imidazole tetrafluoro borate is taken asa functional monomer, N,N'-methylenebis(2-propenamide) is taken as a crosslinking agent, azodiisobutyronitrile is taken as an initiator, oscillation polymerization is carried out at 50 to 70 DEG C toprepare the target product diclofenac sodium surface molecular imprinting polymer. The preparation process is simple; cost is low; excellent selective separation enrichment effect on Diclofenac Sodium left in environment samples is achieved; and the application prospect in the field of Diclofenac Sodium purifying is promising.

The invention discloses a preparing method of light weight wool yarn for roving. The method comprises the first step of adding oil water and an antistatic agent with a certain proportion into a wool mixed material of wool raw materials and chemical fiber, and conducting intensive mixing, wherein the length of the wool mixed material is 5cm or above, and the wool mixed material is in a wavy shape; the second step of carding the wool mixed material in which moisture is absorbed till a spinning requirement is accorded with, controlling the clip distance between roller cylinders to be in a relaxed state till the fiber is not straightened, and then making rove with no twisting degree through winding; the third step of firstly conducting unwinding on wound rove with no twisting degree to form wool yarn, and then lengthening shaft distances in the unwinding process till no tension exists; the fourth step of feeding and winding two ends of each of the wool yarn and filament with a twisting degree; the fifth step of winding two pieces of yarn prepared in the fourth step under the condition that airflow is blown to the yarn. According to the preparing method of the light weight wool yarn for roving, innovation is made in both material selection and technology, the design and manufacturing technology of the wool yarn are a breakthrough made in traditional design application of roving wool yarn, and thus the preparing method of the light weight wool yarn for roving is worthy of popularization.

The invention provides a making method of a molecularly imprinted electrochemical sensing electrode. The method comprises the following steps: self-assembling photo-crosslinkable acrylate-co-styrene random copolymer with propylene chorohydrin as a template molecule through combining macromolecular self-assembling, molecular imprinting and electrophoretic deposition technologies to obtain propylene chorohydrin coated imprinted micelles, depositing through a controlled potential electrolysis technology to form a film on the surface of a gold electrode, carrying out ultraviolet radiation crosslinking on the film under the action of a photoinitiator in order to fix combination sites between propylene chorohydrin and the polymer micelles, and eluting to remove propylene chorohydrin in order to obtain the molecularly imprinted sensing electrode. The sensing electrode can be used to determine the content of propylene chorohydrin, and has good selective identity.

The invention discloses a low-grade gold ore separation and tailing-free utilization process. The process comprises the following steps of: 1, an intelligent light separation and crushing grading combined treatment working procedure; 2, a working procedure of enabling rough concentrates obtained in the first step to enter a gravity flotation separation process; and 3, a working procedure of manufacturing tailings in different stages into building material products with different specifications. The problems of high development cost and low product benefit of low-grade gold ore are solved; gold ore products and different types of building material products are produced; different market requirements are met; a low-grade gold ore separation system of an intelligent light separation machine is developed based on ore characteristics; compared with a traditional light separation machine, the light separation machine loaded with the system is higher in separation accuracy; compared with traditional open circuit arrangement, the multiple combined closed circuit arrangement of the light separation machine, a crushing machine and a screening machine can adapt to different process requirements and obtain more excellent separation indexes, the function of replacing multiple traditional light separation machines with one light separation machine can also be achieved, and equipment investment is saved; and the crushing process is closer to the crushing process adopted by a current separation plant, and production and transformation are easy to carry out.

The invention discloses a peanut tail picking and sorting machine which comprises a rack, a tail picking mechanism, a winnowing mechanism and a screening mechanism. The tail picking mechanism is obliquely hinged to the upper end of the rack, the winnowing mechanism is fixed below a discharge port at the front end of the tail picking mechanism for a certain distance, and peanuts are subjected to primary winnowing after tail picking; the screening mechanism is positioned at the lower part of the winnowing mechanism, the upper part of the screening mechanism is provided with two drum screens, andthe middle part of the screening mechanism is provided with an inner screen net; and the tail picking mechanism and the screening mechanism are driven by a same eccentric device. The tail picking, impurity removing and sorting operation functions for peanuts are completed at a time, fruits are not damaged in the tail picking and sorting process, the operation efficiency is improved, and the laborcost is reduced.

The invention relates to a category of rganic germanium-base quinolinate compound and its synthesis method, which consists of selecting organic germanium acyl chlorine and 8-hydroxy quinoline as starting raw material for substitution reaction, carrying out hydrolysis reaction at normal temperature, and varying solvent to obtain water-soluble organic germanium quinoline ester compound, which has strong anti-tumor activity.

Belonging to the technical field of ion imprinting, the invention provides a fulvic acid based magnetic ion imprinted polymer and a preparation method thereof. Specifically, the fulvic acid based magnetic ion imprinted polymer has a core-shell structure with Fe3O4 / SiO2 composite magnetic particles as the magnetic core, and the magnetic core is coated with a functional shell. The functional shell is an ion imprinted polymer that adopts metal ion as the template and is obtained by crosslinking of a fulvic acid functional monomer. The product has the characteristics of stable structure, excellent selective recognition performance, fast adsorption of template ions, large adsorption capacity, reusability, and good magnetic separation effect. The preparation method comprises the steps of: 1) adopting a surface imprinting technique, taking fulvic acid as the functional monomer and metal ions as the template, under the action of a cross-linking agent, coating a Fe3O4 / SiO2 composite magnetic particle surface with a fulvic acid crosslinked polymer; and 2) desorbing the metal ions to obtain the fulvic acid based magnetic ion imprinted polymer. The method has the advantages of simple process, low cost and small environmental pollution, and is convenient for intra-industry popularization and application.

The invention discloses a multi-stage injection type water-soluble waste gas recovery system and a waste gas recovery process, and belongs to the field of waste gas recovery. The multi-stage injection type water-soluble waste gas recovery system comprises an injector, the left end of the injector is fixedly connected with a flame arrester, the right side of the injector is fixedly connected with a gas inlet pipe, and the left end of the flame arrester is fixedly connected with a primary filter chamber through a communicating pipe; a first three-end communicating pipe is fixedly connected to the position, close to the top end, of the outer wall of the primary filtering chamber, measuring chambers are fixedly connected to the front ends of three branch pipes of the first three-end communicating pipe, and second three-end communicating pipes are fixedly connected to the front sides of the three measuring chambers; and the second three-end communicating pipes are connected with a first absorption tower and a second absorption tower through first two-end communicating pipes, the first absorption tower and the second absorption tower are connected with a water pump, and the water pump is connected with a liquid storage chamber. Through the primary filter chamber, the three measuring chambers and the absorption towers, waste gas is filtered and then fully mixed with an atomized solution, the contact degree of the solution and the waste gas is improved, the solution is saved, and waste is avoided.

The invention discloses a method for preparing a cellulose hollow magnetically imprinted composite microsphere adsorbent, which belongs to the technical field of preparation of environmental protection functional materials. Firstly, ferric iron tetroxide nanoparticles were prepared by co-precipitation method and its surface was hydrophobically modified. Nanocellulose was extracted from medical absorbent cotton by acid hydrolysis, and then NCCs aqueous solution was used as the external water phase, and the template molecule bifenthrin , functional monomer methacrylic acid, crosslinking agent ethylene glycol dimethacrylate, solvent toluene, initiator azobisisobutyronitrile, hydrophobic Fe 3 o 4 As the oil phase, deionized water as the inner water phase to prepare a Pickering double emulsion of water-in-oil-in-water, thermally induced polymerization to prepare cellulose hollow magnetically imprinted composite microsphere adsorbent, and the adsorbent is used for the selection of BF in the solution Sex recognition and adsorption. The results of the adsorption test show that the imprinted adsorbent prepared by the invention has better adsorption capacity, faster kinetic performance and selective recognition performance for BF.

The invention relates to a preparation method of a microzyme magnetic blotting composite microsphere adsorbent, and belongs to the technical field of environmentally-friendly functional material preparation. The method comprises the following steps: preparing ferriferrous oxide nanoparticles through a coprecipitation process, carrying out hydrophobic modification on the surface of the nanoparticles, preparing a stable Pickering emulsion with an oleic acid modified microzyme aqueous solution as a water phase, cyhalothrin as a template molecule, methacrylic acid and 4-vinylpyridine as functional monomers, ethylene glycol dimethacrylate as a cross-linking agent, dimethyl 2,2'-azobis(2-methylpropionate) as an initiator and hydrophobic Fe3O4 as an oil phase, and carrying out thermal-initiated polymerization to prepare the microzyme magnetic blotting composite microsphere adsorbent. Blotting microspheres obtained in the invention have a good magnetic stability, and the adsorption balance, the dynamics and the selection identification performance of the adsorbent are researched through static state adsorption experiments. Results show that the blotting adsorbent prepared in the invention has a good adsorption capacity, fast adsorption kinetics, and has a selection identification performance on LC.

The invention discloses a method for preparing a molecularly imprinted polymer on the surface of diclofenac sodium in an aqueous phase using ZIF-67 as a carrier, using metal-organic framework material ZIF-67 as a carrier, water as a porogen and a solvent, and diclofenac sodium as a template Molecule, 1-allyl-3-vinylimidazole tetrafluoroborate is the functional monomer, N,N'-methylenebisacrylamide is the cross-linking agent, and azobisisobutyronitrile is the initiator. The molecularly imprinted polymer on the surface of diclofenac sodium was prepared by oscillating polymerization at 50-70°C. The molecularly imprinted polymer on the surface of diclofenac sodium prepared by the invention has simple process and low cost, and has a good selective separation and enrichment effect on residual diclofenac sodium in environmental samples, and has broad application prospects in the field of purification treatment of diclofenac sodium.

The invention belongs to the technical field of preparation of environmental protection functional materials, and in particular relates to a preparation method of a cellulose composite porous imprinted adsorbent. First, nanocellulose (NCCs) was extracted from medical absorbent cotton by acid hydrolysis, and then the NCCs colloidal suspension was used as the aqueous phase (w), in which template molecule p-nitrophenol (4‑NP), functional monomer acrylamide ( AM), crosslinking agent N,N'-methylenebisacrylamide (MBAM), surfactant Tween 85, initiator potassium persulfate, liquid paraffin as oil phase (o), prepared oil-in-water (o / w) of Pickering (Pickering) high internal phase emulsion (HIPEs), thermally induced polymerization to prepare cellulose composite porous imprinted adsorbent, and the adsorbent is used for the selective recognition and adsorption of 4-NP in the solution. The results of the adsorption test show that the imprinted adsorbent prepared by the present invention has better adsorption capacity, faster kinetic performance and selective recognition performance for 4‑NP.

The invention discloses a preparation method and application of a Zn<2+> probe cyclically usable in a pure water medium, belonging to the field of fluorescent probes. The invention provides the fluorescent probe which uses a terpyridine polymer as an acceptor molecule and is used for detection of Zn<2+> in the pure water medium, and the probe can be cyclically used 40 times at most. The probe has good capability in selecting and identifying Zn<2+> and is hardly influenced by other metal ions. The detection limit of the Zn<2+> probe to zinc ions in the pure water medium is 1*10<-6> mol / L. The Zn<2+> probe cyclically usable in the pure water medium can be used for detection of zinc ions in a biological system, analysis, detection and fluorescence imaging of zinc ions in living cells and living tissue of organisms, detection of zinc ions in lesion tissue in clinical medicine and detection of zinc ions in environmental waste water.