Abstract: The present disclosure provides a superhydrophobic and self-cleaning anticoagulant composite coating material and a preparation method and use thereof, and relates to the technical field of biomedical materials. In the coating material provided by the present disclosure, a titanium dioxide nanotube-based structure increases microscopic roughness of a surface of a titanium-based metal substrate, and a hydrophobic modification layer reduces surface energy of the material. The rough structure and the hydrophobic modification layer have a synergistic effect to construct a superhydrophobic surface, making the surface of the material have self-cleaning characteristics and low adhesion. Air can be retained on the surface of the material to form an air layer, thereby reducing the contact area between the material and bacteria and platelets in the blood, and inhibiting adhesion of the bacteria, platelets, and plasma proteins to the material.

Abstract: A method for originating a vending transaction via machine-readable code includes storing, in a memory of a computing device, an account identifier associated with a transaction account, reading, by an optical imaging device of the computing device, a machine-readable code displayed on a vending machine, wherein the machine-readable code is encoded with at least a device identifier, electronically transmitting, by a transmitting device of the computing device, at least the device identifier and an account identifier to a third party system, and receiving, by a receiving device of the computing device, a transaction confirmation indicating approval of a payment transaction involving the transaction account and the vending machine.

Abstract: An action recognition method includes: obtaining original feature submaps of each of temporal frames on a plurality of convolutional channels by using a multi-channel convolutional layer; calculating, by using each of the temporal frames as a target temporal frame, motion information weights of the target temporal frame on the convolutional channels according to original feature submaps of the target temporal frame and original feature submaps of a next temporal frame, and obtaining motion information feature maps of the target temporal frame on the convolutional channels according to the motion information weights; performing temporal convolution on the motion information feature maps of the target temporal frame to obtain temporal motion feature maps of the target temporal frame; and recognizing an action type of a moving object in image data of the target temporal frame according to the temporal motion feature maps of the target temporal frame on the convolutional channels.

Abstract: The present disclosure relates to a magnetic apparatus, and a voltage converter including the same. The magnetic apparatus comprises: a first magnetic core (1), including a first planar body (11); a second magnetic core (2), including a second planar body (21); and a third magnetic core (3), including a third planar body (31). The first, second, and third magnetic core (3) are sequentially stacked. The magnetic apparatus further comprises: a first column (101) for a transformer, located between and basically perpendicular to the first planar body (11) and the second planar body (21); at least two second columns (102) for at least two inductors, located between and basically perpendicular to the second planar body (21) and the third planar body (31).

Abstract: A circuit and a method for controlling a rectifier, and a circuit including the rectifier are disclosed. The rectifier may comprise: a transformer (T); an inductor (Lm) coupled with a primary winding (Np) of the transformer (T) in parallel; at least one switching component (SR1, SR2) coupled between a secondary winding (Ns1, Ns2) of the transformer (T) and an output of the rectifier. The method may comprise: sensing (S101) a current flowing into a combination of the inductor (Lm) and the primary winding (Np) of the transformer (T); generating (S102) an indication voltage, based on the sensed current; comparing (S103) the indication voltage and a reference voltage; and driving (S104) the at least one switching component (SR1, SR2), based on a comparison result of the indication voltage and the reference voltage. The timing point for turning on/off the switching component (SR1, SR2) may be optimized, so as to reduce the power loss and improve the efficiency.

Abstract: The near-infrared window of fluorescent heptamethine cyanine dyes greatly facilitates biological imaging because there is deep penetration of the light and negligible background fluorescence. But dye instability, aggregation, and poor pharmacokinetics are current drawbacks that limit performance and the scope of possible applications. All these limitations are simultaneously overcome with a new molecular design strategy that produces a charge balanced and sterically shielded fluorochrome. The key design feature is a meso-Aryl group that simultaneously projects two shielding arms directly over each face of a linear heptamethine polyene. Cell and mouse imaging experiments compared a shielded heptamethine cyanine dye (and several peptide and antibody bioconjugates) to benchmark heptamethine dyes and found that the shielded systems possess an unsurpassed combination of photophysical, physiochemical and biodistribution properties that greatly enhance bioimaging performance.

Abstract: The present disclosure provides a power supply system, including: a power source connected between a first node and a second node for applying an input voltage; a first circuit, connected between the first node and a second circuit; and configured to suppress oscillation caused by load variation of a load circuit that is connected between the first node and the second circuit, and to supply power to the load circuit when the power source is temporarily off; the second circuit, having a first port connected to the first circuit, a second port connected to the load circuit, and a third port connected to the second node; and configured to charge the first circuit and supply power to the load circuit; and a third circuit, connected between the first circuit and the load circuit; and configured to suppress a current flowing into the second circuit.