Abstract: A bidirectional power supply apparatus includes: an alternating current input port for inputting an alternating current to the bidirectional power supply apparatus; an alternating current output port for outputting the alternating current to an alternating current device; a direct current input or output port for transmitting a direct current between the bidirectional power supply apparatus and a direct current device bidirectionally; a bidirectional energy conversion module for performing multiple energy conversions on electrical energy inputted to the bidirectional power supply apparatus; and a power management module electrically connected to the alternating current input port, the alternating current output port, and the direct current input or output port.

Abstract: A bearing seal for a rolling bearing with standard boundary dimensions that comprises a first flinger fitted into a first bearing ring and a second flinger fitted into a second bearing ring. Each flinger further comprises a correspondingly numbered sealing body. A first sealing body engages the second flinger and/or the second bearing ring, and a second sealing body engages the first flinger and/or the first bearing ring. The axial width of the bearing seal varies along the radial direction of the bearing. Starting at the first bearing ring, with a narrow width W, defined relative to the total radial size of the bearing seal L, wherein the ratio W/L is less than or equal to 0.5, the bearing seal widens toward the second bearing ring, thereby providing extra space between the rolling elements and/or cage and the bearing seal adjacent to the first bearing ring.

Abstract: A primary optical element, a primary optical assembly, an optical assembly, a vehicle lamp lighting device and a vehicle. The primary optical element comprises a primary optical element main body comprising a light guiding portion and a fusion light-emitting portion which are provided from rear to front, a front end surface of the fusion light-emitting portion is provided as a light-emitting surface, and the light guiding portion comprises a plurality of light guiding columns, the thickness of the fusion light-emitting portion in the up-down direction greater than the thickness of the light guiding portion in the up-down direction, and the fusion light-emitting portion able to fuse light transmitted by the plurality of light guiding columns to the fusion light-emitting portion, and then emit the light by means of the light-emitting surface. The primary optical assembly, the optical assembly, the vehicle lamp lighting device, and the vehicle comprise the optical assembly.

Abstract: An engineered cementitious composite (ECC) has a tensile strain capacity ranging from 8.6 to 12.5% and includes a cement precursor, unprocessed desert sand, and polymer fibers. The polymer fibers may be ultra-high molecular weight polyethylene fibers, polypropylene fibers, or a combination thereof. A method of preparing an ECC structure includes providing a cementitious precursor mixture including a cement precursor and unprocessed desert sand, introducing water into the cementitious precursor mixture to form a cement slurry, and adding polymer fibers to the cement slurry. The polymer fibers may be ultra-high molecular weight polyethylene fibers, polypropylene fibers, or a combination thereof. Then, the method includes forming a structure with the cement slurry and curing the cement slurry.

Abstract: A stretchable circuit board assembly and a method for manufacturing the same are provided. The circuit board assembly includes a flexible circuit board and an outer circuit board. The flexible circuit board includes a first base layer and an inner wiring layer. The flexible circuit board is divided into a connecting area and a stretchable area. The inner wiring layer within the connecting area includes an electrical connecting portion exposed from the outer circuit board. The stretchable area is configured to deform into at least one bent portion. The bent portion is used to cause the electrical connecting portion to stretch relative to the outer circuit board. The outer circuit board includes a second base layer and an outer wiring layer. A surface of the second base layer away from the outer wiring layer defines at least one blind groove. The blind groove is configured to receive the bent portion.

Abstract: A high-beam optical element includes a light incident part, a light guide part and a light emitting part sequentially arranged from back to front. The light incident part includes a high-beam incident part and an auxiliary lighting structure. The auxiliary lighting structure is configured to receive auxiliary lighting and transmit it to the light guide part after at least one reflection and then project it from the light emitting part as a low-beam III. The high-beam optical element is part of a high-beam illumination unit in a vehicle.

Abstract: An optical assembly mounting structure comprising a primary optical element, a lens mount, a circuit board, and a radiator. Mounting portions on two sides of the primary optical element; each mounting portion comprising a front fitting portion and a rear fitting portion; a primary element limiting frame on the lens mount; the radiator has two C-shaped limiting structures opposite to each other; the circuit board has two C-shaped positioning grooves; the circuit board mounted on the radiator via a fitting between the C-shaped positioning grooves and the C-shaped limiting structures; rear ends of the primary optical element mounted on the radiator via a fitting between the rear fitting portions and the C-shaped limiting structures; front ends are mounted on the lens mount via the fitting between the front fitting portions and the primary element limiting frame. Also, a lighting device comprising the mounting structure, a vehicle lamp, and a vehicle.

Abstract: The present disclosure provides a gantry for an X-ray system. The gantry may include a base section, a lifting section, and a swing section. The base section may be configured to move. A first end of the lifting section may be connected to the base section. A first end of the swing section may be rotatably connected to a second end of the lifting section. A radiation assembly may be disposed on a second end of the swing section.

Abstract: A pipe includes a tubular body made entirely of a desert sand engineered cementitious composite (DSECC) made with a cement binder, unprocessed desert sand, and polymer fibers selected from polyethylene fibers, polypropylene fibers, and a combination thereof. The tubular body has a wall with a thickness that is less than 22 percent of an inner diameter of the pipe. The pipe is fully non-metallic.

Abstract: Provided are lamp unit for headlamp, headlamp including lamp unit, and vehicle including headlamp. Lamp unit includes: lower beam light source, wherein the lower beam light source is configured to emit lower beams; high beam light source, wherein the high beam light source is configured to emit high beams; light distribution member, wherein the light distribution member includes lower beam reflecting surface, wherein the lower beam reflecting surface is configured to reflect part of the lower beams and guide them toward front of the lamp unit; and high beam reflecting surface, wherein the high beam reflecting surface is configured to reflect part of the high beams and guide them toward the front of the lamp unit; and lens, wherein the lens is arranged in front direction of the light distribution member and configured to refract the lower beams and the high beams to front of vehicle including the headlamp.

Abstract: A wind turbine planet gear shaft has a shaft body with an outer surface, a segment of the outer surface being a slide bearing surface configured to form a radial slide bearing with an inner opening of a planet gear. The slide bearing surface has a first portion configured as a non-load-bearing zone and a second portion configured as a load-bearing zone and exactly one axially elongate oil pocket in the slide bearing surface, that oil pocket being located in the non-load-bearing zone. An oil supply channel in the shaft body has a first end in communication with the oil pocket, and first and second oil return channels in the slide bearing surface each have a first end at a longitudinal end of the oil pocket and a second end open to ambient air.

Abstract: A cage for rolling elements of a high speed bearing. The cage includes a cage body made of a polymer material. The cage body includes a lubrication enhancer and/or an elastic modulus enhancer added to the polymer material during the manufacturing process. The lubrication enhancer makes the cage have a low friction coefficient, low heat generation and good wear resistance, and the cage has better stability when the bearing is under high temperature or high speed. The elastic modulus enhancer makes the cage have an excellent high elastic modulus, and the deformation of the cage is significantly reduced under the condition of high-speed operation of the bearing. These effects can be obtained by adding both the lubrication enhancer and the elastic modulus enhancer at the same time, which makes the cage more suitable for high-speed bearings.

Abstract: A low-beam primary optical element for a vehicle lamp, a vehicle lamp module comprising the low-beam primary optical element, a vehicle lamp, and a vehicle. The low-beam primary optical element comprises light entrance portion, a light passage portion and a light exit portion which are sequentially arranged from back to front. The light exit portion comprises a main light exit surface and a second light exit surface connected to the main light exit surface. A low-beam cutoff line structure is provided at the secondary light exit surface. The secondary light exit surface is configured to refract light emitted to the low-beam cutoff line structure forward and upward. The low-beam primary optical element has a simple structure, and can effectively improve the color of a low-beam light-dark cutoff line and mitigate color dispersion.

Abstract: Disclosed is a condenser and a high-and-low-beam integrated vehicle lamp module, the condenser comprises at least one light incident portion, a light-transmitting portion, and a light emergent portion, wherein a 50L dark area light shape forming structure is formed on the light-transmitting portion; the 50L dark area light shape forming structure protrudes from a surface of the light-transmitting portion and has a slope surface; and the distance from the slope surface to the surface of the light-transmitting portion gradually increases from a position close to the light incident portion to the light emergent portion. Since the 50L dark area light shape forming structure protrudes out of the surface of the light-transmitting portion and has the slope surface, in a high-beam illumination mode, some light is emitted from the 50L dark area light shape forming structure to a 50L test point.

Abstract: A dimming mechanism, comprising a fixed ball head connecting piece having one end connected to a lighting unit and another end connected to a support frame or lamp body; a first adjustable ball head connecting piece having one end connected to the lighting unit such that the lighting unit rotates to achieve dimming in a first direction; and a second adjustable ball head connecting piece having one end slidingly connected to a sliding slot provided on the lighting unit so that by means of the front and back motion of the second adjustable ball head connecting piece, the sliding slot is driven to rotate, and the lighting unit is, by means of the rotation of the sliding slot, driven to rotate so as to achieve dimming in a second direction. Further disclosed are a vehicle lamp module comprising a dimming mechanism, a vehicle lamp, and a vehicle.

Abstract: A vehicle light optical element, a vehicle light module, and a vehicle light. The vehicle light optical element comprises light-incident portions, a light-emergent face and a reflecting face, wherein the light-incident portions are arranged on a side of the light-emergent face; and the reflecting face is configured to be able to reflect light rays, which are emitted from the light-incident portions into the reflecting face, to the light-emergent face, so as to be emitted out of the light-emergent face. The vehicle light optical element has the characteristics of a smaller front-rear size, a smaller up-down size, and larger left-right size, and can better adapt to the current vehicle light shape trend.

Abstract: A vehicle headlamp is provided, where a high beam module includes a primary optical element (2) and a primary light source (3) located on a back side of the primary optical element (2), and light emitted by the primary light source (3) forms a high beam light shape after passing through the primary optical element (2), where the high beam module is further provided with an auxiliary light source (4) beside the primary light source (3), light emitted by the auxiliary light source (4) forms an auxiliary light shape (6) after passing through the primary optical element (2), and when the low beam module is in a light-emitting state, the auxiliary light source (4) is in a light-emitting state. Beneficial effects: in a low beam lighting mode, a high beam part of the vehicle headlamp remains on, which improves the beauty of the overall appearance of the vehicle headlamp.