Abstract: The present invention discloses a method for rapid on-site detection of fentanyl analogs using a miniature mass spectrometer, comprising the following steps: (1) selecting a spotting plate; (2) loading a sample: depositing the sample and 3-nitrobenzonitrile solution in acetonitrile on the spotting plate to form a crystalline mixture; (3) carrying out analysis and detection: setting the parameters of the miniature mass spectrometer, placing the crystalline mixture on the spotting plate in close proximity to the inlet of the miniature mass spectrometer, and facilitating the ionization of the crystalline mixture for the analysis and detection of fentanyl analogs. The method for rapid on-site detection of fentanyl analogs using a miniature mass spectrometer provided by the present invention requires no extraction solvent, no voltage, no laser, no gas, and the method is simple, rapid, and suitable for rapid on-site detection of fentanyl analogs.

Abstract: The present disclosure relates to a wireless charging receiver, a charging system, and a terminal. The wireless charging receiver includes: a receiving coil, configured to couple an alternating magnetic field of a transmitting coil of a wireless charging transmitter, to obtain an AC power supply; a receiving chip, having an input coupled to the receiving coil and an output coupled to an input of a switched-capacitor conversion chip, and configured to convert the AC power supply into a first DC power supply; and the switched-capacitor conversion chip, having an output coupled to a battery, and configured to output a second DC power supply based on the first DC power supply, and charge the battery based on the second DC power supply.

Abstract: Provided is a system for detecting article store or retrieve operations. The system for detecting store or retrieve operations includes: an article storage-retrieval cabinet, an image acquiring unit, and a storage or retrieval detecting unit, wherein an edge of an entrance-exit of the article storage-retrieval cabinet is provided with a marker, and the image acquiring unit is configured to acquire an image of the entrance-exit of the article storage-retrieval cabinet; and the storage or retrieval detecting unit is connected to the image acquiring unit, and is configured to detect an article store or retrieve operation based on marker information in the image acquired by the image acquiring unit.

Abstract: A method includes receiving, at an application server, a request to modify a target object, such as a resource object. The method further includes identifying, from the request, a first parameter and a second parameter and assigning the first parameter to a first variable and the second parameter to a second variable. The method then executes an operation to calculate the target object in view of the first and second variables.

Abstract: The present invention provides a pavement deicing or snow-melting system, comprising a water-permeable pavement, a drainage device and a heating device, wherein the water-permeable pavement comprises, successively from the top down, a water-permeable asphalt concrete coating, a porous cement stabilized macadam layer, a reflecting layer, a waterproof layer, a semi-rigid base and a semi-rigid cushion; the drainage device comprises a drainage ditch and a sheet cover; a water inlet is formed on the drainage ditch; a lower edge of the drainage ditch is not lower than the waterproof layer; curbs are arranged on edges of the water-permeable asphalt concrete coating and the porous cement stabilized macadam layer; and, the heating device is arranged between the water-permeable asphalt concrete coating and the porous cement stabilized macadam layer.

Abstract: The present invention discloses a method for authentication of animal species origin of leather products, which includes the following steps: Step 1: Model establishment: (1) Collect leather samples from different animal species origins, set mass spectrometric parameters, cut the surface of leather samples using a preheated electric soldering iron, and detect the resulting sample ions using the mass spectrometer; (2) Create a multivariate statistical model based on principal component analysis and linear discriminant analysis of rapid evaporative ionization mass spectrometric data and evaluate the model with cross-validation tests; Step 2: Analysis of real leather samples: detect and authenticate the identity of real leather samples based on the multivariate statistical model. The authentication method disclosed in present invention is a rapid analytical method that requires no sample pretreatment and can identify the animal species origin of leather products rapidly and accurately.

Abstract: The invention discloses a detection method based on supercritical fluid chromatography (SFC) and post-column dicationic ionic liquid (DIL) charge complexation, which includes the following steps: (1) The supramolecular solvent (SUPRAS) was prepared by mixing heptanol, tetrahydrofuran, and water; (2) Sample pretreatment: the SUPRAS was used to extract the sample for subsequent analysis; (3) Analysis of perfluorinated compounds (PFCs) using SFC separation, post-column DIL-based charge complexation, and electrospray ionization-mass spectrometry (ESI-MS). The invention established a novel analytical method for the detection of PFCs in textiles incorporating post-chromatographic DIL-based charge complexation and SFC coupled with ESI-MS. The DIL reagent formed positively charged complexes with anionic analytes during the ESI process, facilitating MS detection in the positive ion mode with enhanced detection sensitivity.

Abstract: The present invention discloses a method of preparing a catalyst for low-temperature synergistic catalytic purification of NOx and HCN in a flue gas, and the use thereof. Citric acid is dissolved in ethanol to obtain a citric acid/ethanol solution; tetrabutyl titanate is added, mixed uniformly to obtain a tetrabutyl titanate-citric acid/ethanol solution; glacial acetic acid is added dropwise to react for 30-40 min to obtain a solution A; the metal salt solution was added dropwise into the solution A, mixed uniformly and added with nitric acid, ammonium hydroxide is added dropwise to adjust the pH value, and the temperature is raised at a constant speed to obtain a gel B; dried and then then baked at a temperature of 300-500° C. for 3-4 h, cooled in the furnace, pulverized, tableted and sieved to obtain the catalyst for the low-temperature synergistic catalytic purification of NOx and HCN in the flue gas.

Abstract: A fuel cell electrode with catalysts grown in situ on an ordered structure microporous layer and a method for preparing a membrane electrode assembly (MEA) are disclosed. The fuel cell electrode includes an electrode substrate layer, a hydrophobic layer, an ordered structure hydrophilic layer and catalysts. The hydrophobic layer is prepared on the electrode substrate layer. The ordered structure hydrophilic layer is prepared on the hydrophobic layer. The catalysts are uniformly distributed on the ordered structure hydrophilic layer.

Abstract: Disclosed is a metal anode, including a metal anode body (10) and a protective layer (11) formed on one or two side surfaces of the metal anode body (10). The protective layer (11) includes a coordination polymer having an unsaturated metal site or a complexation product formed by complexation between the coordination polymer having the unsaturated metal site and anions of battery electrolyte salt. The coordination polymer uses zirconium, aluminum, or iron as a center and uses R—Xn as an organic ligand, R is n-valent hydrocarbyl, substituted hydrocarbyl, or hydrocarboxy, n is an integer in a range of 1 to 4, X is an oxygen-containing functional group capable of forming metal-oxygen chemical bond with the metal anode body (10), and the metal-oxygen chemical bond is formed between metal atoms on a surface of the metal anode body (10) and oxygen atoms in the X group.anodeanode.

Abstract: The embodiment of the present application provides an image processing method and device, and relates to the technical field of image processing. The method includes: obtaining a to-be-processed image; obtaining a first image that is obtained by performing resolution reduction processing on the to-be-processed image; performing image processing on the first image to obtain a second image; and increasing a resolution of the second image to a preset resolution as an image processing result. Applying the solution provided in the embodiments of the present application for image processing can reduce the requirements on image resolution in an image processing process.

Abstract: An impeller, rotating about a central axis includes a cup portion having a bottom portion and a cylindrical portion, a base portion, a plurality of vanes. The impeller further includes a plurality of rib portions, formed on a surface of a side opposite to another side of the base portion where the vanes are provided, wherein each of the rib portions is disposed axially opposite to at least a portion of a corresponding one of the vanes, and the rib portion and the vane are separated by the base portion; wherein a ring-shaped rib portion centering at the central axis and connected with the rib portions is further formed on the surface of the side opposite to the another side of the base portion where the vanes are provided, and the ring-shaped rib portion extends axially from the base portion in a direction opposite the vanes.

Abstract: This invention provides a quick detaching device for handgun tactical light which includes a tactical light base, two locking members correspondingly disposed on two sides of a top end of the tactical light base, sliding members and a pressing mechanism; a sliding slot is correspondingly mounted in a middle part of each of the sliding members; the sliding members are respectively mounted in the sliding slots; a through slot which passes through the tactical light base is provided in the tactical light base; a stopping plate is provided in a middle part of the through slot; the pressing mechanism is mounted in the through slot and corresponds to the stopping plate. This invention can quickly mount and detach the tactical light without the help of tools and great effort, and is convenient to use.

Abstract: Provided are a personalized automatic customization method and an apparatus for a ring-pull can. In the apparatus, a bin device is located at an upper part of the apparatus, a distributing device is installed below a bin device, and a pushing device is arranged on a side of the distributing device and a positioning device. A pattern of a marking content is set on the control system, and a feeding wheel is driven to rotate so that a canned beverage falls down. The pushing device pushes the ring-pull can to the positioning device. The control system receives the positioning signal, and a marking header of the marking device is driven to mark on an outer surface of the ring-pull can. The pushing device pushes the ring-pull can towards a second chute, and an electrical thrust cylinder extends the electric push rod out thereof to push the discharging hopper forward.

Abstract: This invention includes a first clamping means which comprises a base and a clamp for mounting a portable lighting apparatus; the clamp is mounted on a first end surface of the base; sliding slots are formed on two opposite side walls of the base; a second end surface of the base is provided with a groove; fixing rings, each of which comprises a connecting strip and first fixing members provided at two ends of the connecting strip; the connecting strips are mounted on the sliding slots for the base to slide on the fixing rings; a support comprising a body and a plurality of contact beads; the plurality of contact beads are mounted on the body by elastic members; a second clamping means comprising a fixing block and movable lock blocks mounted on two sides of the fixing block; the fixing block is mounted on the support.

Abstract: A fan and an electromechanical device are provided. The fan includes: an impeller, a motor, a motor support portion, a wire, and a wire lead-out portion. The wire lead-out portion includes: a base portion; a wire holding portion limiting movement of the wire in a first direction; and a wire locking portion, formed at an end of the wire holding portion and extending along the extension direction of the base portion, wherein the wire locking portion limits a movement of the wire in a second direction perpendicular to both the first direction and the extension direction of the base portion. The wire locking portion includes a blocking portion that does not extend beyond the wire holding portion in the extension direction of the base portion, and an extension portion extending from the blocking portion to an outer side of the wire holding portion along the extension direction of the base portion.

Abstract: The present invention discloses a xylose hydrolysate decolorization and filtration device. A hydrolysate is filtered through a to-be-cleaned filtering machine to form a waste carbon liquid with a light transmittance of 7% to 10%, the waste carbon liquid is subjected to pressure filtration through a filter press to form a plate and frame liquid, the plate and frame liquid is filtered through a to-be-passed-through filtering machine to form a pre-decolorized liquid with a light transmittance of 30% to 35%, the pre-decolorized liquid enters a decolorization tank and is mixed with added new carbon in the decolorization tank to form a new carbon liquid, and the new carbon liquid is filtered through a standby filtering machine to form a decolorized liquid with a light transmittance of greater than 65%. The present invention further discloses a xylose hydrolysate decolorization and filtration method using the device.