Abstract: Disclosed is an occluding stent. The occluding stent includes a distal flange occluding body, a proximal flange occluding body, and a connection portion. External surfaces of the distal flange occluding body and the proximal flange occluding body are both provided with a coating. An external surface of the connection portion is wholly or partially provided with a coating. A first occluding coating is provided between the distal flange occluding body and an inner cavity of the connection portion. The present application overcomes the defect that the existing occluder device for closure of an esophagobronchial fistula is harmful to surrounding tissues, makes the device retractable, enhances the safety of the device, and improves life and treatment of patients. A new safe and effective treatment method for an esophagobronchial fistula is provided.

Abstract: A dimming member includes a first electrode, a second electrode, and a dimming film. The dimming film includes a first substrate, a first conductive layer, a dimming layer, a second conductive layer, and a second substrate that are stacked in sequence. The dimming layer, the first conductive layer, and the second conductive layer cooperatively define an accommodating space. The first electrode and the second electrode are disposed in the accommodating space. The first electrode is attached to the first conductive layer at one side of the first conductive layer away from the first substrate and is electrically connected to the first conductive layer. The second electrode is attached to the second conductive layer at one side of the second conductive layer away from the second substrate and is electrically connected to the second conductive layer.

Abstract: A data processing system implements a method for training machine learning modes, including receiving a set of one or more unlabeled documents associated one or more first categories of documents to be used to train machine learning models to analyze the one or more unlabeled documents, and fine-tuning a first machine learning model and a second machine learning model based on the one or more unlabeled document to enable the first machine learning model to determine a semantic representation of the one or more first categories of document, and to enable the second machine learning model to classify the semantic representations according to the one or more first categories of documents, the first machine learning model and the second machine learning model having been trained using first unlabeled training data including a second plurality of categories of documents that do not include the one or more first categories of documents.

Abstract: Provided are a near-infrared II polymer fluorescent sub-microsphere and a method for preparing the same. The method includes steps of 1) dissolving fluorochrome in a water-immiscible organic solvent, thus obtaining a fluorochrome solution; 2) distributing a polymer sub-microsphere into a sodium dodecyl sulfonate solution, thus obtaining a sub-microsphere solution with the polymer sub-microsphere as a carrier for the fluorochrome; 3) subjecting a first mixture of the fluorochrome solution and the sub-microsphere solution to ultrasonic treatment, thus obtaining an emulsion; 4) swelling the emulsion such that the fluorochrome solution enters nanopores formed during swelling of the polymer sub-microsphere, thus obtaining a second mixture; and 5) heating the second mixture to volatilize the organic solvent, such that the fluorochrome is crystallized out and encapsulated in the nanopores, thus obtaining the near-infrared II polymer fluorescent sub-microsphere.

Abstract: A process of phosphate flotation comprising: pulping phosphate ore with water to about 55% to 75% solids to produce an ore slurry; conditioning the ore slurry with a new reagent scheme to produce a conditioned slurry; subjecting the conditioned slurry to flotation to produce an underflow and an overflow; and collecting the overflow as phosphate concentrate. The new reagent scheme may comprise a combination of fatty acid, fuel oil, and fatty acid soap, and may not comprise a pH modifier. The process may also work effectively at a lower percent solids than conventional reagent schemes.

Abstract: A reagent for phosphate flotation, the reagent comprising at least two fatty acids, an alcohol-based surfactant, and chemicals with sulfonate or sulfate groups. The reagent may not comprise fuel oil or diesel. The reagent may increase recovery of phosphate while improving the selectivity, and thus the grade, of the phosphate concentrate.

Abstract: Provided are a near-infrared II polymer fluorescent microsphere and a method for preparing the same. The method includes steps of 1) dissolving fluorochrome in a water-immiscible organic solvent, thus obtaining a fluorochrome solution; 2) distributing a polymer microsphere into a sodium dodecyl sulfonate solution, thus obtaining a microsphere solution with the polymer microsphere as a carrier for the fluorochrome; 3) subjecting a first mixture of the fluorochrome solution and the microsphere solution to ultrasonic treatment, thus obtaining an emulsion; 4) swelling the emulsion such that the fluorochrome solution enters nanopores formed during swelling of the polymer microsphere, thus obtaining a second mixture; and 5) heating the second mixture to volatilize the organic solvent, such that the fluorochrome is crystallized out and encapsulated in the nanopores, thus obtaining the near-infrared II polymer fluorescent microsphere.

Abstract: Provided are a test strip for short-wave near infrared immunofluorescence chromatographic detection, a system for immunofluorescence chromatographic detection and a method for quantifying an analyte in a sample.

Abstract: The invention is related to a flotation process using an improved collector to remove alkaline earth metal carbonate impurities from phosphate ores. The flotation feed may be conditioned with the improved carbonate collector at acidic pH, and subjected to a reverse flotation. The cell overflow may be collected as waste in which carbonate minerals dominate, and the cell underflow may be the phosphate concentrate. The collector may be a combination of chemicals, comprising: (1) any kind of fatty acids, either conventional fatty acid, saponified fatty acid, or modified fatty acid; (2) chemicals with sulfonate or sulfate groups, such as dodecylbenzene sulfonic acid (DDBSA) or its salt, sodium dodecyl sulfate (SDS), sodium lauryl sulfate (SLS), sodium coco sulfate (SCS), etc.; and (3) phosphorous-bearing chemicals, such as sodium tripolyphosphate (STPP), sodium hexametaphosphate (SFMP), trisodium phosphate (TSP), Tetrasodiumpyrophosphate (TSPP), etc.

Abstract: A process of phosphate flotation comprising: pulping phosphate ore with water to about 55% to 75% solids to produce an ore slurry; conditioning the ore slurry with a new reagent scheme to produce a conditioned slurry; subjecting the conditioned slurry to flotation to produce an underflow and an overflow; and collecting the overflow as phosphate concentrate. The new reagent scheme may comprise a combination of fatty acid, fuel oil, and fatty acid soap, and may not comprise a pH modifier. The process may also work effectively at a lower percent solids than conventional reagent schemes.

Abstract: A search method, a search server and a search system are provided in the present disclosure. The method includes acquiring feature data of a user and a search keyword; generating text files associated with product clusters according to the feature data of the user and the search keyword; and displaying the text files associated with the product clusters on a search result browsing interface corresponding to the search keyword. Using the technical solutions provided by the embodiments of the present disclosure, a user can be made to stay in a search interface in a more effective way, thus effectively increasing a click-through rate and a transaction rate of the user.

Abstract: A method of removing impurities from silicates or clays through selective flocculation. The method comprises mixing a chemical product with silicates or clays, where the chemical product comprises a copolymer of acrylic acid, acrylamide, or a combination of acrylic acid and acrylamide with at least one of the following monomers: hydroxyl ethyl methacrylate, 2-acrylamido-2-methyl propane sulfonic acid, and/or 3-allyloxy-1,2-propanediol, or a derivative thereof; allowing impurities to separate from the silicates or clays; and removing the impurities from the silicates or clays. The chemical product may further comprise tannic acid, where the active tannic acid to active polymer concentration is 1% to 25% tannic acid, or more particularly 1% to 5% tannic acid.

Abstract: The invention is related to a flotation process using an improved collector to remove alkaline earth metal carbonate impurities from phosphate ores. The flotation feed may be conditioned with the improved carbonate collector at acidic pH, and subjected to a reverse flotation. The cell overflow may be collected as waste in which carbonate minerals dominate, and the cell underflow may be the phosphate concentrate. The collector may be a combination of chemicals, comprising: (1) any kind of fatty acids, either conventional fatty acid, saponified fatty acid, or modified fatty acid; (2) chemicals with sulfonate or sulfate groups, such as dodecylbenzene sulfonic acid (DDBSA) or its salt, sodium dodecyl sulfate (SDS), sodium lauryl sulfate (SLS), sodium coco sulfate (SCS), etc.; and (3) phosphorous-bearing chemicals, such as sodium tripolyphosphate (STPP), sodium hexametaphosphate (SFMP), trisodium phosphate (TSP), Tetrasodiumpyrophosphate (TSPP), etc.

Abstract: All natural defoaming compositions useful in high strength acid media utilizing phosphatide emulsifiers that are considerably more effective at reduced application rates than prior art compositions are described.

Abstract: Novel 3-N-cycloalkyl-5-substituted-2-thioxothiazolidin-4-one derivatives that are effective for use in treating viral infections are described. Also described are pharmaceutical compositions comprising the 3-N-cycloalkyl-5-substituted-2-thioxothiazolidin-4-one derivatives and methods for using the compounds or compositions.

Abstract: Novel 3-N-cycloalkyl-5-substituted-2-thioxothiazolidin-4-one derivatives that are effective for use in treating viral infections are described. Also described are pharmaceutical compositions comprising the 3-N-cycloalkyl-5-substituted-2-thioxothiazolidin-4-one derivatives and methods for using the compounds or compositions.

Abstract: Some mineral processing plants encounter difficulties in dewatering pulps using clarifier/thickener (C/T) equipment due to a layer of fine particles, air bubbles and chemicals formed at the top of the liquid in the thickener. Such layers are very stable and form a cap on the C/T. The dewatering performance of the C/T then deteriorates under these conditions, and a high percentage of solids is contained in the thickener overflow. A process for removing water from rock slurry containing a wide range of particle sizes in mineral processing operations has been developed. The process includes: (a) classifying the feed slurry into two size fractions, namely a coarse fraction and a fine fraction, (b) treating the fine fraction (and the coarse fraction if required) with a selected flocculant, and (3) thickening the flocculated slurry in sedimentation equipment to separate liquid from solids.

Abstract: All natural defoaming compositions useful in high strength acid media utilizing phosphatide emulsifiers that are considerably more effective at reduced application rates than prior art compositions are described.

Abstract: Some mineral processing plants encounter difficulties in dewatering pulps using clarifier/thickener (C/T) equipment due to a layer of fine particles, air bubbles and chemicals formed at the top of the liquid in the thickener. Such layers are very stable and form a cap on the C/T. The dewatering performance of the C/T then deteriorates under these conditions, and a high percentage of solids is contained in the thickener overflow. A process for removing water from rock slurry containing a wide range of particle sizes in mineral processing operations has been developed. The process includes: (a) classifying the feed slurry into two size fractions, namely a coarse fraction and a fine fraction, (b) treating the fine fraction (and the coarse fraction if required) with a selected flocculant, and (3) thickening the flocculated slurry in sedimentation equipment to separate liquid from solids.

Abstract: This invention relates to the pH modifier in alkaline froth flotation processes to treat oxide and semi-soluble salt ores, such as phosphates, sulfates, carbonates and halides, to increase the recovery while generally maintaining or improving selectivity, thus the grade of desired minerals. The invented pH modifier is used to replace traditional alkaline pH modifiers - hydroxides, carbonates and bicarbonates, such as sodium hydroxide, sodium carbonate, lime and ammonia in anionic flotation processes. The pH modifier is aqueous solution, comprised of combinations of sodium hydroxide, sodium carbonate, and sodium silicate, along with sulfonated surfactant products, such as sulfonated petroleum oil, fatty acids, alkylates, ethoxylated alcohol ethers, and also sulfosuccinamates; and anionic polymers. The pH modifier is also used as a promoter for anionic collectors and as a depressant for gangue minerals.