Abstract: A fan impeller mid-segment, a cross-flow fan impeller and an air conditioner is provided, wherein the fan impeller mid-segment includes a disc having a first side and a second side opposite to each other, wherein the first side is provided with a blade, and the second side is provided with a welding groove configured to be welded with the blade on another fan impeller mid-segment, and the number of the welding grooves is two or more than two, and the welding grooves are sequentially arranged at intervals along a circumferential direction of the disc; the second side is also provided with a silencing groove located between two adjacent welding grooves.

Abstract: The present disclosure discloses extracellular vesicles loaded with polydopamine nanoparticles, and a preparation method. A nano targeted treatment platform includes extracellular vesicles originating from M2 RAW264.7 macrophages and the polydopamine nanoparticles encapsulated within the extracellular vesicles as effective treatment ingredients. The nano targeted treatment platform of the present disclosure treats RAW264.7 macrophages with IL-4 and IL-10 cytokines to polarize them into M2 macrophages, and then co incubates polydopamine nanoparticles with the M2 macrophages to directly acquire extracellular vesicles loaded with the polydopamine nanoparticles using an extrusion method. The present disclosure may be applied in preparation of anti-inflammatory drugs or preparations for atherosclerosis. The present disclosure has a very objective application prospect in treatment of the atherosclerosis.

Abstract: A method for controlling impurities in L-arabinose includes the step of removing impurities in a starting raw material of L-arabinose using adsorption resin. The content of impurities such as 5-hydroxymethylfurfural and furfural in the L-arabinose product can be effectively controlled, and particularly, impurities can be removed from the source and upstream process, so that the toxic side effects of impurities are reduced, and the quality and the administration safety of the L-arabinose product are improved.

Abstract: Molecular self-assembled nanoparticles and a preparation method and application thereof are provided in the present application, relating to the technical field of precise treatment of arthritis. The molecular self-assembled nanoparticles include a neutrophil membrane and aspirin-functionalized polyethylene glycol (PEG) nanoparticles, where the neutrophil membrane is coated on a surface of the aspirin-functionalized PEG nanoparticles, and a mass ratio of the neutrophil membrane to the aspirin-functionalized PEG nanoparticles is 1:8.

Abstract: A shaving compression mechanism of a pencil sharpener, and a pencil sharpener are disclosed. The shaving compression mechanism of the pencil sharpener includes: a conveying member provided in a shaving box, the conveying member being located below a cutting position; and a power source, the power source being connected with the conveying member and configured to drive the conveying member to rotate, the conveying member rotating to convey shavings that fall onto the conveying member to a distal end in the shaving box. In the shaving compression mechanism of the pencil sharpener, the shavings are effectively conveyed to the distal end in the shaving box and are compacted through the rotation of the conveying member, thus optimizing the space utilization of the shaving box, reducing the piling of the shavings, decreasing the difficulty in clearing, and improving the cleanliness and stability of the pencil sharpener.

Abstract: A foldable water-absorbent anti-slip floor mat based on foamed recycled sponge includes a bottom layer, a foamed sponge middle layer, and a surface layer. The bottom layer, the foamed sponge middle layer, and the surface layer are laminated together. The surface layer includes a water-absorbent polyester fabric formed by knitting and weaving. The middle layer includes an elastomer made of foamed recycled sponge. The bottom layer includes an anti-slip layer, and ridge-shaped folding marks are formed on the surface of the bottom layer. The foldable configuration of the anti-slip floor mat enables the mat to be compactly folded for storage and display.

Abstract: A buckle includes a base assembly. The base assembly includes a base having a protrusion and a first base magnet positioned at least partially within the protrusion. The buckle includes an outer assembly that is removably coupled to the base assembly. The outer assembly includes a connector, a shaft, and a release member that is pivotably coupled to the connector with the shaft. The release member and the shaft include a ferromagnetic material. The release member includes a release member opening. The release member is configured to pivot relative to the connector from a first position to a second position. When the release member is in the first position, the protrusion of the base is positioned at least partially interior to the release member opening. When the release member is in the second position, the protrusion of the base is positioned exterior to the release member opening.

Abstract: Provided herein are compounds of the formula: wherein the variables are as defined herein. Pharmaceutical compositions of the compounds are also provided. In some aspects, these compounds may be used for the treatment of diseases or disorders, such as an infection of an antibiotic resistant bacteria.

Abstract: In one aspect, the present disclosure provides methods of treating a bacterial infection using an inhibitor of the nucleotidyltransferase superfamily enzyme. In some embodiments, the compounds have one of the following formulas (I), (II), (III), or (IV) wherein R1, R2, and R3 are as defined herein or a pharmaceutically acceptable salt thereof. The compounds may be used to treat a bacterial infection including an infection of Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species.

Abstract: The present disclosure relates to an electrocardiogram (ECG) mapping method and system. By acquiring a palm ECG signal, dividing the palm ECG signal into multiple palm ECG episodes according to a preset intercepted length, converting the palm ECG episodes into standard ECG episodes with an ECG mapping model, and connecting all standard ECG episodes according to a connection sequence of the multiple palm ECG episodes to obtain a standard ECG signal corresponding to the palm ECG signal, the present disclosure establishes a mapping relationship between the palm ECG and the standard ECG with the ECG mapping model to implement the waveform conversion from the palm ECG to the standard ECG, and the converted standard ECG is highly similar to the 12-lead standard ECG, thus preventing the misdiagnosis.

Abstract: A multi-layered woven component and method is disclosed. The multi-layered woven component comprising a first side adapted to be in contact with a skin surface of a user, the first side comprising a plurality of yarns of a first type and a plurality of yarns of a second type. The plurality of yarns of the first type in the first side predominates the plurality of yarns of the second type in the first side. Further, a second side opposite to the first side, the second side comprising at least a portion of the plurality of yarns of the second type. Further, the first side of the multi-layered woven component is woven with the second side of the multi-layered woven component to facilitate transfer of moisture from the first side of the multi-layered woven component to the second side of the multi-layered woven component.

Abstract: A method of controlling a movement of a hybrid robot including a locomotion stimulation device carried by an animal includes monitoring, via a positioning component the locomotion stimulation device, a position and an orientation of the hybrid robot; providing, via a stimulator of the locomotion stimulation device, a stimulus to the animal based on an angular difference between the orientation with respect to a direct path from the position to a predetermined destination to control the movement of the hybrid robot; monitoring, via the positioning component, one or a combination of a displacement, a velocity or an acceleration of the hybrid robot in response to the stimulus; ceasing provision of the stimulus to the animal in response to the one or the combination of the displacement, the velocity or the acceleration being below a corresponding pre-defined minimum so as to allow the animal to roam freely.

Abstract: Techniques are disclosed for mapping in a movable object environment. A system may comprise a movable object, a payload coupled to the movable object, the payload comprising an embedded system including an embedded processor, a scanning sensor, one or more cameras, and an inertial navigation system (INS). The payload further including an online processing application, the online processing application including instructions which, when executed by the embedded processor, cause the online processing application to obtain mapping data from the scanning sensor, obtain image data from a camera of the one or more cameras, obtain positioning data from the INS, associate the mapping data with the positioning data to generate georeferenced data, downsample the georeferenced data to generate downsampled georeferenced data, and provide the downsampled georeferenced data to a client device to be visualized on the client device in real-time.

Abstract: An anti-fatigue gel ground mat based on recycled sponge is disclosed, which includes a ground mat body. A beveled edge structure is arranged around the ground mat body. The ground mat body includes a surface layer, a gel layer, a recycled sponge layer, and an anti-skid layer compounded together in sequence from top to bottom. The gel layer is polyurethane solid gel. By arranging the gel layer, when the user steps on the ground mat body, the surface of the ground mat body is naturally concave to realize fatigue resistance. By arranging the beveled edge structure, the user can be prevented from stumbling, so that the safety is improved. The polyurethane solid gel is extruded in the shape of a snake to a lower surface of the surface layer through extrusion equipment, so that the use level of the polyurethane solid gel can be effectively reduced.

Abstract: A service for providing extensible fraud detection may manage the application of a ruleset that evaluates whether or not a transaction is fraudulent. The service groups the features in a ruleset or across multiple rulesets, and dispatches a thread for each group to obtain the feature values for that group. The service evaluates the ruleset with the obtained feature values to determine whether or not a given transaction is fraudulent in view of the ruleset.

Abstract: The application discloses a dimming control circuit, a dimming control method, and a LED driver circuit. The dimming control circuit comprises a logic signal generation circuit and a feedback signal generation circuit. wherein the logic signal generation circuit is configured to compare the sampling signals with a first threshold signal and a second threshold signal respectively to obtain a first group of logic signals and a second group of logic signals. Wherein the feedback signal generation circuit is coupled to the logic signal generation circuit, which is configured to generate feedback signals to reduce energy output when each of the sampling signals is greater than the first threshold signal, and configured to generate feedback signals to increase the energy output when any one of the sampling signals is smaller than the second threshold signal.

Abstract: A ratchet structure is provided. The ratchet structure comprises a housing having at least one pair of racks slidably overlapped with each other. Further, a cover coupled to the housing, having a cavity. Further, a ratchet gear detachably secured within the cavity, and comprising a plurality of elastic ribs having one or more grooves. Further, a knob having a plurality of driving ribs configured to be received within the one or more grooves of the plurality of elastic ribs. Therefore, the plurality of driving ribs facilitates the movement of the plurality of elastic ribs of the ratchet gear to slide the at least one pair of racks.

Abstract: Provided are an electron detection device and a scanning electron microscope. The electron detection device includes: a reflective energy analyzer including first and second control electrodes that are sequentially arranged in an incidence direction of an electron beam; a first detector disposed at a side of the second control electrode away from the first control electrode; a second detector disposed at a side of the first control electrode away from the second control electrode; and a conductive shielding tube penetrating the first and second control electrodes in the incidence direction and configured to shield an electric field generated by the reflective energy analyzer, allowing the electron beam to pass through and be incident on the target sample. First control electrode is configured to generate a first electric field between the first and second control electrodes. The first electric field is configured to guide the secondary electron to the first detector.

Abstract: The present disclosure relates to an electrocardiogram (ECG) mapping method and system. By acquiring a palm ECG signal, dividing the palm ECG signal into multiple palm ECG episodes according to a preset intercepted length, converting the palm ECG episodes into standard ECG episodes with an ECG mapping model, and connecting all standard ECG episodes according to a connection sequence of the multiple palm ECG episodes to obtain a standard ECG signal corresponding to the palm ECG signal, the present disclosure establishes a mapping relationship between the palm ECG and the standard ECG with the ECG mapping model to implement the waveform conversion from the palm ECG to the standard ECG, and the converted standard ECG is highly similar to the 12-lead standard ECG, thus preventing the misdiagnosis.