Abstract: This application describes multi-band antenna systems and base stations. An example antenna system a frequency selective surface (FSS); at least one radiating element array on a first side of the FSS; and at least one feeding network corresponding to the at least one radiating element array, wherein the at least one feeding network corresponding to the at least one radiating element array is connected to the FSS according to a direct current connection manner or a segmented direct current connection manner, or the at least one feeding network corresponding to the at least one radiating element array is integrated on the FSS.

Abstract: The present disclosure relates to a water cup. The water cup includes a cup body and a cup lid detachably connected to the cup body. The cup lid includes a drinking component and a dustproof component. The drinking component includes a base and a straw mouthpiece. The base is provided with a first straw through-hole. The straw mouthpiece is connected to the base via a movable component. The base is provided with two first grooves. The two first grooves are symmetrically arranged along and with respect to a side wall of the first straw through-hole. The dustproof component includes a fixing member, a switching member, and a dustproof cover arranged in sequence from top to bottom along a height direction of the water cup. An inner side of the switching member is symmetrically provided with two first protrusions. The switching member is connected to the base.

Abstract: The present disclosure relates to a water cup. The water cup includes a cup body and a cup lid detachably connected to the cup body. The cup lid includes a drinking component and a dustproof component. The drinking component includes a base and a straw mouthpiece. The base is provided with a first straw through-hole. The straw mouthpiece is connected to the base via a movable component. The base is provided with two first grooves. The two first grooves are symmetrically arranged along and with respect to a side wall of the first straw through-hole. The dustproof component includes a fixing member, a switching member, and a dustproof cover arranged in sequence from top to bottom along a height direction of the water cup. An inner side of the switching member is symmetrically provided with two first protrusions. The switching member is connected to the base.

Abstract: A silicone rubber insulator shed material, and a silicone rubber insulator and a preparation method therefor and an application thereof. The components of the silicone rubber insulator shed material comprise silicone rubber, iron oxide, nano-montmorillonite, fumed silica, aluminum hydroxide, a silane coupling agent, a vulcanizing agent, and hydroxy silicone oil, wherein the iron oxide and the nano-montmorillonite can slow down the thermal oxidation decomposition of the silicone rubber, thus improving the hydrophobicity, hydrophobic mobility and hydrophobic recovery of the silicone rubber composite insulator, thereby solving the technical problem in the prior art that the aging decomposition resistance of silicone rubber needs to be improved.

Abstract: Embodiments of the present disclosure provide an underwater vehicle, comprising a frame and a driving device; wherein a wing fixing support rod, a wing rotating support rod and a wing tip support rod are provided on the driving device, a first end of the wing fixing support rod and a first end of the wing rotating support rod are movably connected to the driving device, a second end of the wing rotating support rod is movably connected to the wing tip support rod, and at least one main wing rib is provided on the wing fixing support rod and the wing rotating support rod, and at least one wing tip wing rib is sleeved on the wing tip support rod.

Abstract: A transmission line assembly includes a shielding cover and a signal line. The shielding cover is connected to a ground end. The shielding cover has an accommodation space. A first opening and a second opening are provided in the accommodation space. The signal line includes a first end and a second end that are disposed opposite to each other. The signal line penetrates the accommodation space, and there is a gap between the signal line and an inner side wall of the accommodation space. The first end passes through the first opening. The second end passes through the second opening. At least one of the first end and the second end of the signal line is configured to be connected to a signal end. The signal line is in an air dielectric, so that a signal loss is effectively reduced.

Abstract: This application describes multi-band antenna systems and base stations. An example multi-band antenna system includes: a plurality of radiating element arrays, feeding networks separately corresponding to the plurality of radiating element arrays, at least one layer of a frequency selective surface (FSS), and a reflection panel. The plurality of radiating element arrays are located above the reflection panel. All or some of the plurality of radiating element arrays are stacked. The at least one layer of the FSS is located between the stacked radiating element arrays. A feeding network corresponding to at least one radiating element array in the stacked radiating element arrays is electrically connected to the at least one layer of the FSS, or the feeding network corresponding to the at least one radiating element array is integrated on the at least one layer of the FSS.

Abstract: A simplified method and system for denoising an infrared image by using non-local means (NLMeans) based on a field programmable gate array (FPGA), a medium, and a device are provided. The method includes: step S1: determining a size of a search window and a size of a matching window; step S2: performing linear superposition on a Manhattan distance and a Chebyshev distance to calculate a similarity between each matching block and a central block; and step S3: calculating a weight of each matching block based on the similarity, and calculating a current denoising result based on each matching block and the corresponding weight. The method can basically maintain a noise denoising effect of original NLMeans, and enable the NLMeans to be easily implemented on an FPGA.

Abstract: This application relates to the field of communications technologies, and discloses a backup power supply control method, to obtain target power supplying duration of a battery, and determine average power consumption of a communication station (101) within a time period corresponding to the target power supplying duration. Further, a state of charge of the battery is obtained, and actual power supplying duration for the battery to supply power to the communication station (101) is determined based on the state of charge of the battery and the average power consumption. Therefore, an operation mode of a communication device in the communication station (101) may be adjusted, to reduce the average power consumption of the communication station (101) within the time period corresponding to the target power supplying duration.

Abstract: A wing structure for a vehicle includes a plurality of multi-connecting-rod structures, the multi-connecting-rod structures are arranged along the main body of the vehicle, each of the multi-connecting-rod structure being arranged in a direction extending from a main body of the vehicle to a wingtip, each of the multi-connecting-rod structures comprising a plurality of connecting rods, and the connecting rods that are adjacent to each other being connected by a motor, a plurality of groups of ribs are sleeved onto each of the multi-connecting-rod structures, and each group of the ribs comprises a plurality of rib units, wherein in the same group of the ribs, adjacent rib units are connected by a ball hinge. The present technical solution can perform adjustment on a complex flow field or environment, the motion speed and the motion efficiency are significantly improved, and high maneuvering actions can be achieved.

Abstract: Embodiments of the present disclosure provide a biomimetic underwater vehicle which is mainly used in water, comprising a head portion and a body portion, wherein the head portion comprises a first housing, a motor portion is provided in the first housing, the motor portion comprises a plurality of motor assemblies; the body portion comprises a second housing, and a plurality of rotation joints corresponding to the plurality of motor assemblies are provided in the second housing; the plurality of rotation joints are sequentially connected along the length direction of the biomimetic underwater vehicle, and the rotation joint at the most downstream is connected to a tail portion, and each of the motor assemblies is connected to the corresponding rotation joint via two pull ropes and drives the rotation joint to move, and the two pull ropes are located on two sides of the body portion respectively.

Abstract: This application discloses an antenna, an antenna array, and a communications device. The antenna includes a radiation part and a feeding part. The feeding part is coupled to the radiation part and is configured to feed power to the radiation part, so that the radiation part radiates a low-frequency signal outward. The radiation part includes one or more frequency selection units with a bandpass characteristic, and the radiation part is a structure that is capable of exciting, when a high-frequency signal passes through, coupling currents. When the high-frequency signal passes through the radiation part, each pair of coupling currents excited on the radiation part appear in pairs and can cancel each other. This can reduce or even completely eliminate a high-frequency induced current with the same frequency as the high-frequency signal on the radiation part.

Abstract: The embodiments of the disclosure provide a driving device for an aircraft and an aircraft, and the driving device includes a first energy storage motor device, a second energy storage motor device, a third energy storage motor device, a fourth energy storage motor device and a crankshaft, wherein a first end of the crankshaft is fixedly connected to the first energy storage motor device, and a middle portion of the crankshaft is connected to the second energy storage motor device, the second energy storage motor device is connected by a supporting portion to the third energy storage motor device, and the fourth energy storage motor device is provided at a output end of the third energy storage motor device, power output directions of the first energy storage motor device, the second energy storage motor device, the third energy storage motor and the fourth energy storage motor device are different from each other.

Abstract: Embodiments of this application disclose a common aperture antenna and a communication device. The common aperture antenna includes: a reflection panel and a low frequency antenna unit, a frequency selective panel, and a high frequency antenna unit that are disposed on the same side as the reflection panel and are arranged in sequence. In the direction perpendicular to the reflection panel, the distance between the high frequency antenna unit and the reflection panel is greater than the distance between the low frequency antenna unit and the reflection panel, the frequency selective panel is disposed between the high frequency antenna unit and the low frequency antenna unit, and the frequency selective panel is a reflection ground of the high frequency antenna unit and has a total reflection characteristic for the working frequency of the high frequency antenna unit.

Abstract: Embodiments of the present disclosure provide a wing element structure for an aircraft, comprising a plurality of wing element units, wherein adjacent wing element units are connected by airfoil control units, hydraulic units and wing element outer edge connecting members, each of the wing element units comprises a plurality of wing element edge members connected to one another and a wing support rod connecting member, and the wing support rod connecting member located in a wing leading edge in the wing element unit is connected to a support rod structure on an aircraft main body.

Abstract: Embodiments of the present disclosure provide a wing element structure, a wing structure, and a flapping-wing aircraft. The wing element structure includes a plurality of wing element units, the adjacent wing element units being connected by an airfoil control unit and awing element outer edge connector, wherein each of the wing element units includes a plurality of interconnected wing element edge pieces and a wing link connector, and the wing link connector in each of the wing element units is correspondingly connected to a wing lever group of an aircraft. Embodiments of the present disclosure provide the wing element structure with large-scale variable airfoil characteristics in both chord length and curvature. The movement of the wing element structure is driven by the movement of the wing lever group.

Abstract: Embodiments of the present disclosure provide a wing element structure for an aircraft, a wing structure and an aircraft. The wing element structure comprises: a plurality of wing element units, wherein adjacent wing element units are connected by airfoil control units and wing element outer edge connecting members, each of the wing element units comprises a plurality of wing element edge members connected to one another and a wing support rod connecting member, and the wing support rod connecting member in the wing element unit is correspondingly connected to a wing support rod on an aircraft main body.

Abstract: A multi-band antenna structure, including a first antenna element, a second antenna element, a reflection panel, and a first parasitic structure of the first antenna element. A distance between the reflection panel and an antenna element with a higher operating frequency band is less than a distance between the reflection panel and an antenna element with a lower operating frequency band. A distance between the first antenna element and the second antenna element is less than 0.5 times a vacuum wavelength corresponding to a lower frequency bands. A distance between the first antenna element and the first parasitic structure is less than 0.5 times a vacuum wavelength corresponding to an operating frequency band of the first antenna element. A distance between the second antenna element and the first parasitic structure is less than 0.5 times a vacuum wavelength corresponding to an operating frequency band of the second antenna element.

Abstract: An apparatus is provided to prevent water ingress to a medical device with a housing. Such water ingress may originate, for example, from a connected humidifier. The apparatus consists of an endcap including at least one aperture for selective coupling with a compatible accessory. The end cap is constructed from panels which cooperate to provide an internal fluid passageway for diverting water from the point of ingress to the exterior of the housing.

Abstract: The present application relates to a suction dredger for use on an underwater hard soil layer and relates to the technical field of bridge construction equipment. The present suction dredger includes a mud suctioning mechanism, a mud-breaking mechanism, and a blockage-prevention assembly. The mud suctioning mechanism includes a pressurizing assembly and a suction dredging pipe. The suction dredging pipe passes through the pressurizing assembly and the two ends thereof at least partially extend past the pressurizing assembly. The side wall of the section of the suction dredging pipe located in the pressurizing assembly is provided with multiple pressurization holes that are inclined upward in the direction from the outer wall to the inner wall. The pressurizing assembly is used for, via the pressurization holes, forming low pressure in the suction dredging pipe. The mud-breaking mechanism includes at least two mud-breaking assemblies.