Abstract: An antenna apparatus includes a circuit board and an antenna body. The antenna body includes a first radiator and a second radiator that are indirectly coupled. The first radiator comprises a first stub and a second stub that are opposite to, but do not touch each other to form a first gap, the first stub and the second stub are located on a first side edge of the circuit board, a second gap is configured between the first stub and the first side edge, and also between the second stub and the first side edge. The second radiator is located on the circuit board to form a third gap in-between. A vertical projection of the second radiator is located on the first surface. The first stub and the second stub are electrically connected to reference ground of the circuit board separately.

Abstract: An electronic device includes a housing and a display screen that enclose an internal space. The housing includes a first conducting layer, and the display screen includes a second conducting layer. The first conducting layer and the second conducting layer are layered, and a conducting connection member disposed inside the electronic device is electrically connected between the first conducting layer and the second conducting layer. The first conducting layer, the conducting connection member, and the second conducting layer jointly enclose a cavity with a slot, forming a cavity-backed slot antenna.

Abstract: In an antenna design, a metal frame of an electronic device and a printed circuit board (PCB) form a slot antenna radiator, where two common mode (CM) slot antenna modes of the slot antenna radiator are excited through anti-symmetrical feeding, so that when dual resonances and wideband coverage are implemented, specific absorption ratio (SAR) values in the two CM slot antenna modes are close.

Abstract: The electronic device includes a composite antenna including a slot antenna and a wire antenna. A first strip-shaped conductor of the slot antenna includes a first ground part, a second ground part, and a feeding part. The first ground part and the second ground part are respectively two ends of the first strip-shaped conductor. The feeding part is located between the first ground part and the second ground part. A second strip-shaped conductor of the wire antenna includes a first end and a second end. The first end of the second strip-shaped conductor is electrically connected to the first ground part. The second end of the second strip-shaped conductor is an open end.

Abstract: An optical system for measuring a parallelism of rays of a light emitter and virtual imaging distances (VIDs) of the light emitter, the optical system including an enclosure, a pair of apertures, and a lens system disposed between the front and rear end of the enclosure, wherein a first and second of the apertures allows a first and second set of rays into the enclosure to be disposed through the optical lens system to be cast on an imaging plane as a first and second spot, respectively, wherein a parallelism of the sets of rays is based on a correspondence of a distance between the spots with a distance between sets of rays and a VID of the light emitter is based at least in part on an offset of the imaging plane from the lens system focus position when the light emitter is not optically disposed at infinity.

Abstract: In accordance with an embodiment, an antenna includes at least two radiators. The at least two radiators include a first radiator and a second radiator that are spaced apart in parallel, and a first end of the first radiator is disposed closer to a first end of the second radiator than a second end of the first radiator. Both the first radiator and the second radiator are connected to a feed point.

Abstract: An antenna design solution is provided. A metal frame and a PCB ground layer of an electronic device are used to form a slot. Through symmetric feeding and anti-symmetric feeding, the slot can be excited to generate two slot antenna patterns: a CM slot antenna pattern and a DM slot antenna pattern. In addition, the two slot antenna patterns share a same slot antenna radiator.

Abstract: Techniques of integrating lateral HBT devices into a silicon on insulator (SOI) CMOS process. Similar approaches could also be applied to Fin Field-Effect Transistors (FinFETs). A first technique makes use of a CMOS replacement gate process that is typically associated with a partially depleted SOI (PDSOI) or fully depleted SOI (FDSOI) process. A second technique is independent of the CMOS process. Both techniques can accommodate silicon germanium (SiGe) and/or III-V materials, include a self-aligned base contact, and can be used to construct both NPN and PNP transistors with varied peak fT and breakdown voltages.

Abstract: A block chain-based short message verification method that includes a client randomly generating a sequence number and encrypting the sequence number; the client sending a mobile phone number and the encrypted sequence number to a service end; the service end sending the mobile phone number and the encrypted sequence number to a short message operation end to store same in an intelligent contract of a block chain; the short message operation end randomly generating a verification code and sending the verification code to the client; the short message operation end encrypting the verification code and correspondingly storing a mobile phone number, the encrypted sequence number and the encrypted verification code into the intelligent contract of the block chain. Said method can prevent a server and a short message operator from impersonating a user for short message verification before the user performs verification, thereby improving the security of short message verification.

Abstract: A microstrip antenna includes a radiator and a first feed and a second feed that are configured to feed a radio frequency signal, and a first feedpoint and two second feedpoints are disposed on the radiator. The first feedpoint is located at a central position of the radiator, and the first feedpoint is electrically connected to the first feed, and is configured to feed a radio frequency signal into the radiator, to excite the radiator to generate a TM02 mode. The two second feedpoints deviate from the central position of the radiator and are spaced apart from the first feedpoint. The second feed is electrically connected to the second feedpoints through an adjustment circuit. The second feedpoints are configured to feed a radio frequency signal into the radiator, and the second feedpoints excite, by using the adjustment circuit, the radiator to generate a TM10 mode.

Abstract: A reaction mixture and production method for making a polyurethane comprising material having reduced aldehyde emissions.

Abstract: In some embodiments, an antenna system includes a first antenna and a second antenna. The first and second antenna include a shared first radiator and an additional radiator. Two ends of the first radiator are connected to a ground, each radiator has a first end farther from a first end of the other radiator, and the first end of the second radiator and the first end of the third radiator are separately connected to the first radiator. The second end of the second radiator is disposed opposite a gap to the second end of the third radiator. The first antenna is through a first feeding connection on the second radiator, and the second antenna is through a second feeding connection on the third radiator.

Abstract: A prism module for enabling a large field of view high resolution sampling of incoming rays, the prism module including a plurality of elongated prisms disposed about a central axis, each of the prisms including a fore surface; an aft surface; and a reflecting surface connected on a first edge to the fore surface and connected on a second edge to the aft surface, wherein the fore surface is configured to receive the incoming light rays orthogonally disposed with respect to the fore surface, the reflecting surface configured to reflect the incoming light rays to cause outgoing light rays to exit at a right angle through the aft surface to form an image with a maximum distortion not recognizable by a human eye.

Abstract: A wavefront tester for measuring the wavefront of a sample via an optical path, the wavefront tester including a mirror, an imaging lens, an aperture, a beam splitter, a wavefront sensor, a lens selection system including a plurality of optical lenses, a suitable optical lens of which is commensurate with the sample and selected to be disposed in the optical path and a light source directed in a first direction through the optical path by the beam splitter through the suitable optical lens and the sample to the mirror such that the light source is redirected in a second direction opposite the first direction through the optical path and the beam splitter, the aperture and the imaging lens to be received at the wavefront sensor.

Abstract: An electronic device includes a conductive frame and a first antenna unit. The conductive frame is disposed around a periphery of the electronic device. The first antenna unit includes a first conductive layer and a second conductive layer spaced apart in a thickness direction of the electronic device; a conductive connection portion is configured to connect the first conductive layer and the second conductive layer; and a first conductive frame, is a part of the conductive frame. The conductive connection portion, the first conductive frame, the first conductive layer, and the second conductive layer enclose a first cavity, and the first conductive layer and the first conductive frame are spaced apart to form a first slot of the first cavity.

Abstract: A method, a device, and a computer program product for data management are provided in embodiments of the present disclosure. A method for data management comprises: acquiring, from a storage system, a torrent file associated with downloading of a target file, the target file being stored in the storage system, and the torrent file comprising at least a plurality of data digests of a plurality of data blocks of the target file; generating metadata for the plurality of data blocks based on the torrent file, the metadata being in a format supported by a unified management system, and the unified management system being configured for data access across the storage system and at least one other storage system; and storing the metadata for data-block-level access to the plurality of data blocks through the unified management system.

Abstract: An optical target system for a device under test disposed in an optical path, the optical target system including a pupil, a lens system and a target configured to be adjustable in position along the optical path such that the object distance of the target with respect to the lens system, is adjustable, the lens system is disposed between the pupil and the target along the optical path, wherein a first virtual image cast behind the target is of a first size when the target is disposed at a first position along the optical path, a second virtual image cast behind the target is of a second size when the target is disposed at a second position along the optical path.

Abstract: Embodiments of the present disclosure relate to a method for storage management, an electronic device, and a computer program product. According to an example implementation of the present disclosure, a method for storage management is provided, which comprises receiving an access request for target metadata from a user at a node among a plurality of nodes included in a data protection system, wherein the access request includes an identification of the target metadata; based on the identification, acquiring target access information corresponding to the identification from a set of access information for the user, wherein the target access information records information related to access to the target metadata; and if the target access information is acquired, determining the target metadata based on the target access information.

Abstract: A particle content extraction device, comprising: a first extracting unit, configured to extract, from a whole sample containing a target particle, an extraction sample containing the target particle without performing an abort processing; a second extracting unit, configured to subject the extraction sample to the abort processing and to extract the target particles; and a stirring unit, arranged in a flow path between the first extracting unit and the second extracting unit and configured to vary particle interval in the extraction sample extracted from the first extracting unit, and the stirring unit comprises a tubular member connected to a pump to provide the extraction sample to the second extracting unit. The particle content extraction device can quickly analyze and extract the particle components through the extraction process provided by the present application, which is convenient for users to carry out analysis work.

Abstract: A reaction mixture and production method for making a polyurethane comprising material having reduced aldehyde emissions.