Abstract: Embodiments of this application provide a phase shifter and a base station antenna. The phase shifter includes a fixing frame, a phase-shifting stripline, and a sliding dielectric. The fixing frame includes a guide rail. The phase-shifting stripline is fixed on the guide rail. The sliding dielectric is slidably connected to the guide rail, and the sliding dielectric is separated from the phase-shifting stripline by the guide rail. The guide rail can guide movement of the sliding dielectric relative to the phase-shifting stripline, helping improve smoothness of the movement of the sliding dielectric relative to the phase-shifting stripline. Because the sliding dielectric is separated from the phase-shifting stripline by the guide rail, and during the movement of the sliding dielectric relative to the phase-shifting stripline, the sliding dielectric does not rub against the phase-shifting stripline.

Abstract: A pressurized nebulizer includes a nozzle, a peristaltic pump, and an elastic braided hose. The peristaltic pump includes a fixing part, a mating part, a rotating base and a roller. When the mating part and the fixing part are in a closed state, the elastic braided hose is arranged between the mating part and the fixing part, and between the mating part and the roller. An output end of the elastic braided hose is connected with the nozzle. The roller in the working stroke has a limit position of extruding the elastic braided hose to a limit state, a minimum clearance formed between the roller and the mating part is 1.5T?P?1.9T, where T denotes a unilateral wall thickness of the elastic braided hose, and P denotes the minimum clearance. The nebulizer can avoids liquid contact contamination, provide a stable output and have accurate accuracy.

Abstract: Disclosed is a seismic resilience assessment method and system for a railway girder bridge in the technical field of bridge engineering structures, which solves the technical problem of the absence of seismic resilience assessment methods applicable to railway bridges in the prior art. The method includes: a nonlinear finite element model of the entire bridge is established to perform vulnerability analysis; according to the vulnerability results, damage states of components and traffic functionality damage states are quantified by weighting damage probabilities; a post-earthquake repair time and functionality recovery values are determined to obtain post-earthquake traffic functionality recovery curves of the bridge; and resilience indices of the bridge is obtained ultimately and the bridge functional states are classified into three levels.

Abstract: A base station antenna includes a feed network, a cable and an adapter structure. The feed network includes a cavity, and an internal structure in the cavity. The adapter structure includes a first transmission line. A first end of the first transmission line is electrically connected to the internal structure. A second end of the first transmission is electrically connected to the cable. The first transmission line is configured to transmit a radio frequency signal. The first transmission line is at least partially located outside the cavity.

Abstract: A straight hair comb with a detachable and heat-insulating comb cover is provided; which includes a main body, the main body is provided with a heating comb head and an installation chamber located at an area of the heating comb head. The installation chamber is detachably connected to the heat-insulating comb cover. The heating comb head is provided with metal comb teeth, and the heat-insulating comb cover is provided with through holes corresponding to the metal comb teeth. The metal comb teeth pass through the through holes and are extended into the heat-insulating comb cover. By designing the heat-insulating comb cover as a detachable structure, a user can easily remove it for cleaning. Thus, the user can quickly remove dirt and broken hair from the straight hair comb, thereby maintaining the hygiene of the comb and increasing the favorability and satisfaction with this product.

Abstract: In an electronic parking braking system and a control method thereof, the system includes a transmission apparatus, a main parking braking controller and an auxiliary parking braking controller. The transmission apparatus sends a parking request signal when a parking (P) stage is input. The main parking braking controller determines whether being capable of performing a main parking braking control upon receiving the parking request signal, performs the main parking braking control upon determining that the main parking braking controller can perform the main parking braking control, and sends a failure signal to the transmission apparatus upon determining that the main parking braking controller cannot perform the main parking braking control. When the transmission apparatus receives the failure signal, the auxiliary parking braking controller may perform an auxiliary parking braking control.

Abstract: An optical coherence tomography scanning system traverses its respective scan pattern quickly, typically completing an entire two-dimensional frame faster than a conventional raster scanner completes one raster line segment. To traverse the scan pattern quickly, the system takes fewer A-scans per length of scan pattern than a conventional OCT scanner. To compensate for the sparsity of the sample points along the respective scan line segments, and for gaps between respective line segments of the trajectory, the system acquires and combines several partially overlapping frames for each study to generate a dense OCT image. A visible light camera captures an image for each traversal of the scan pattern, but only a predetermined subset of pixels in the visible light image, which correspond to locations on the anatomical item interrogated by a sample arm of the OCT, are used to color corresponding pixels in the dense OCT image.

Abstract: The present invention discloses an optical module and an optical device, the optical module comprising a substrate, lenses, and optical components, wherein the substrate comprise mounting portions; the lenses cover the mounting portions, the lenses have a central axis perpendicular to a surface of the mounting portions, central cross sections of the lenses along the central axis are arc-shaped surfaces; the optical components comprise first light-emitting chips at an intersection of the central axis and the mounting portions, and second light-emitting chips disposed between the first light-emitting chips and a periphery of the lenses, the first light-emitting chips and the second light-emitting chips being configured to be independently activable. The optical module of the technical solution of the present invention enables flexible switching of multiple light-emitting angles.

Abstract: Disclosed area scattering film, a display module and a display device. The scattering film includes: a scattering particle layer on a bearing layer, the scattering particle layer including a plurality of scattering particles and having a surface away from the bearing layer being a curved surface; 90% or more of the scattering particles in the scattering particle layer have a particle size larger than or equal to 5 ?m and less than or equal to 30 ?m.

Abstract: An optical coherence tomography scanning system traverses its respective scan pattern quickly, typically completing an entire two-dimensional frame faster than a conventional raster scanner completes one raster line segment. To traverse the scan pattern quickly, the system takes fewer A-scans per length of scan pattern than a conventional OCT scanner. To compensate for the sparsity of the sample points along the respective scan line segments, and for gaps between respective line segments of the trajectory, the system acquires and combines several partially overlapping frames for each study to generate a dense OCT image. A visible light camera captures an image for each traversal of the scan pattern, but only a predetermined subset of pixels in the visible light image, which correspond to locations on the anatomical item interrogated by a sample arm of the OCT, are used to color corresponding pixels in the dense OCT image.