Abstract: A method for processing an interphase short circuit of a three-phase non-effective grounding power supply system, includes: when a two-phase or three-phase interphase short circuit occurs in a circuit, maintaining a fault phase of the circuit to be conducting and tripping off remaining fault phases, and enabling another fault phase connected to said fault phase to be artificially grounded or directly utilizing an existing grounding point; enabling a charged phase or a neutral point of the three-phase non-effective grounding power supply system other than said fault phase to be cyclically connected to and disconnected from the ground, to form a closed loop together with said fault phase and generate a current pulse, and detecting the current pulse by a controlled switch. When a certain controlled switch reaches a trigger condition and cuts off a circuit, a fault is cleared.

Abstract: A boat stand includes a base that stacks compactly when not in use. The base comprises a vertical support column, a first pair of support legs extending from the support column in a first direction relative to a transverse plane of the boat stand, and a second pair of support legs extending from the support column in a second direction relative to the transverse plane. The first pair of support legs connect to the support column at a first distance from a top end of the support column. The second pair of support legs connect to the support column at a second distance from the top end of the support column greater than the first distance so as to enable compact stacking of two or more boat stands.

Abstract: A search system according to an embodiment is a search system including one or more boarding-type mobile objects moving within a predetermined area and a mobile object management server managing the boarding-type mobile objects and includes a receiver that receives registration of information on a search target, an imaging controller that activates an imager mounted on the one or more boarding-type mobile objects when the registration of the information on the search target is received by the receiver, an acquirer that acquires an image of surroundings of the boarding-type mobile object captured by the imager, and a determiner that determines whether the search target is included in the image acquired by the acquirer.

Abstract: A projection display apparatus includes a projection lens unit that projects image light and on which external light including the image light reflected by a projection target is incident, an optical path separation prism, a narrowband retarder plate and an imaging element. The optical path separation prism includes the first prism having first and second surfaces, the second prism having a third surface disposed on a side of projection lens unit, a fourth surface facing the second surface and a fifth surface, and the polarization separation coating being disposed between the second surface and the fourth surface. The narrowband retarder plate aligns the image light into a first polarization state. Light in a second polarization state in the external light is reflected by the polarization separation coating, is totally internally reflected by the third surface, is emitted from the fifth surface, and is received by the imaging element.

Abstract: An electronic device includes a housing, an antenna structure, and a support member. The housing provides a front surface, a rear surface, and a side surface of the electronic device. The antenna structure may be located in an inner space of the housing. The antenna structure may include a printed circuit board having a first surface facing the front surface and a second surface facing in a direction opposite to the first surface, and can include at least one antenna element. The support member may be combined with the housing. The antenna structure may be disposed on the support member. The support member on which the antenna structure is disposed may be inserted into a recess provided in a sidewall of the housing providing the side surface. The sidewall may include a connection portion, which may be combined with a front plate of the housing providing the front surface.

Abstract: A method for determining an auxiliary bit of a polar code and an apparatus. At least K sub-channels are determined based on reliability of a first sub-channel set, where the K sub-channels carry information bits. S sub-channel subsets are determined based on the first sub-channel set, an ith sub-channel subset in the S sub-channel subsets includes Ji sub-channels carrying auxiliary bits and Ki sub-channels in the K sub-channels. Sequence numbers of the Ji sub-channels carrying the auxiliary bits are after sequence numbers of the Ki sub-channels. The auxiliary bits are known redundancy check RC bits. Polar encoding is performed on the information bits and the auxiliary bits, to output polar-encoded data.

Abstract: An optical module with detachable optical port includes a module body and an optical port plastic part. The optical port of the module body is provided with a groove for inserting the optical port plastic part, and the optical port plastic part and the groove are detachably connected. A test method for an AOC optical module is provided, where the AOC optical module is the above-mentioned optical module with detachable optical port. According to the optical module with a detachable optical port, the detachable optical port plastic part can be disassembled and replaced independently without disassembling the module body, which can make this optical module scheme more convenient to change into the AOC module by replacing the plastic part of the optical port, and there is no need to re-do the performance test, which effectively improves the flexibility of the product scheme.

Abstract: A hair weft includes a first hair weft unit and a second weft unit, the first hair weft unit includes a first hair strand a hair transplantation base, wherein the first hair strand is fixed to the hair transplantation base, the second weft unit includes a second hair strand and an attaching base, wherein the second hair strand is fixed to the attaching base, wherein the attaching base is attached to the hair transplantation base.

Abstract: The photovoltaic module includes at least one cell unit group, where the cell unit group includes multiple cell strings, and adjacent cell strings are connected by a connection structure. The connection structure includes a lead-out structure, which includes a main body portion, a first connecting portion and a second connecting portion that are arranged on the main body portion; the first connecting portion is connected to the second connecting portion, the first connecting portion is disposed in parallel to a length direction of the main body portion, and the second connecting portion extends out of the first connecting portion. In the length direction of the main body portion, the main body portion has a first edge, the second connecting portion is closer to the first edge relative to the first connecting portion, and a distance between the second connecting portion and the first edge ranges from 2 mm to 20 mm.

Abstract: A wiping unit for a reciprocating ram includes a subunit including: a ring-shaped wipe member including a lip to press an outer peripheral surface of the ram; and an elastic ring disposed on an outer circumference of the wipe member and configured to press the lip on the outer peripheral surface of the ram. The wipe member is made of rigid resin.

Abstract: Embodiments of this application provide a laser scanning apparatus, which is a key component of a Lidar and may be used in fields such as autonomous driving and intelligent driving. The scanning apparatus includes: a scanning micromirror chip, a packaging shell, and a packaging component. The scanning micromirror chip includes a scanning micromirror and a laser, where the scanning micromirror and the laser are integrated at different positions of the scanning micromirror chip. The packaging shell is located on the scanning micromirror chip, and forms a hollow structure together with the scanning micromirror chip. Both the laser and the packaging component are located in the hollow structure. In addition, the packaging component is fixed on the packaging shell, and is configured to collimate and reflect a beam emitted by the laser, and emit an output beam to the scanning micromirror.