Abstract: Disclosed in embodiments of the present disclosure are an imaging lens, an imaging device and an imaging system, including: a lens body, including: a first optical surface and a second optical surface arranged in sequence along an incident direction of light; the first optical surface includes: an annular light incident area, for transmitting incident light; and at least one first annular reflection area, surrounding the first annular reflection area; the second optical surface includes: a light emitting area, for transmitting emitted light; and at least one second annular reflection area, surrounding the light emitting area; the incident light is incident into the lens body through the annular light incident area, is reflected for a plurality of times between the at least one second annular reflection area and the at least one first annular reflection area in sequence, and is emitted outwards from the lens body through the light emitting area.

Abstract: A magnetic recording medium includes a magnesium oxide underlayer including magnesium oxide, and a magnetic layer including an alloy having a L10 structure and includes Fe or Co and Pt. The magnesium oxide has a peak of an O1s spectrum detected in a range of 531 eV to 533 eV when measured by X-ray photoelectron spectroscopy.

Abstract: Disclosed herein are methods and compositions for inactivating TCR genes, using engineered nucleases comprising at least one DNA binding domain and a cleavage domain or cleavage half-domain in conditions able to preserve cell viability. Polynucleotides encoding nucleases, vectors comprising polynucleotides encoding nucleases and cells comprising polynucleotides encoding nucleases and/or cells comprising nucleases are also provided. Disclosed herein are also methods and compositions for expressing a functional exogenous TCR in the absence of endogenous TCR expression in T lymphocytes, including lymphocytes with a central memory phenotype. Polynucleotides encoding exogenous TCR, vectors comprising polynucleotides encoding exogenous TCR and cells comprising polynucleotides encoding exogenous TCR and/or cells comprising exogenous TCR are also provided.

Abstract: The technology described herein is directed to systems, methods, and software for indexing video. In an implementation, a method comprises identifying one or more regions of interest around target content in a frame of the video. Further, the method includes identifying, in a portion of the frame outside a region of interest, potentially empty regions adjacent to the region of interest. The method continues with identifying at least one empty region of the potentially empty regions that satisfies one or more criteria and classifying at least the one empty region as a negative sample of the target content. In some implementations, the negative sample of the target content in a set of negative samples of the target content, with which to train a machine learning model employed to identify instances of the target content.

Abstract: The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens satisfies following conditions: 1.51?f1/f?2.50, 1.70?n2?2.20, ?2.00?f3/f4?2.00, ?10.00?(R13+R14)/(R13?R14)?10.00 and 1.70?n5?2.20, where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; f3 denotes a focal length of the third lens; f4 denotes a focal length of the fourth lens; n2 denotes a refractive index of the second lens; n5 denotes a refractive index of the fifth lens; R13 denotes a curvature radius of an object-side surface of the seventh lens; and R14 denotes a curvature radius of an image-side surface of the seventh lens.

Abstract: The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

Abstract: A touch LED component and a touch device, and the touch LED component includes a metal cap, a touch button sheathed on an inner wall of the metal cap, and an LED lamp bead coupled to an inner wall of the touch button, a first through hole formed at the top of the metal cap, an induction pin installed at the bottom of the touch button, and an anode pin and a cathode pin installed on both sides of the bottom of the LED lamp bead respectively. The touch device includes a touch panel, a circuit board, and plural touch LED components. The touch LED component with high integration can be packaged by carrier tapes to facilitate automatic plug-ins and simplify production and assembling processes for mass production. The touch device has the features of simple structure, high reliability, good effect and long life.

Abstract: The present disclosure relates to an optical lens, in particular to a camera optical lens. The camera optical lens includes, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the second lens has a negative refractive power, and the third lens has a negative refractive power, and the camera optical lens satisfies the following conditions: 3.00?f1/f?6.00, and ?14.00?R7/d7??5.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, R7 denotes a curvature radius of an object-side surface of the fourth lens, d7 denotes an on-axis thickness of the fourth lens. The camera optical lens can obtain high imaging performance and a low TTL.

Abstract: The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens satisfies following conditions: 1.51?f1/f?2.50, 1.70?n3?2.20, ?2.00?f3/f4?2.00, ?10.00?(R13+R14)/(R13?R14)?10.00 and 1.70?n6?2.20, where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; f3 denotes a focal length of the third lens; f4 denotes a focal length of the fourth lens; n3 denotes a refractive index of the third lens; n6 denotes a refractive index of the sixth lens; R13 denotes a curvature radius of an object-side surface of the seventh lens; and R14 denotes a curvature radius of an image-side surface of the seventh lens.

Abstract: The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens; a fifth lens; and a sixth lens. The camera optical lens satisfies following conditions: 4.00?f1/f?6.00; and ?50.00?R5/d5??20.00. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.

Abstract: The present disclosure describes a compound, a light-emitting material, an organic light-emitting display panel and an organic light-emitting display device. The compound has the structure of Formula I. The light-emitting material comprises any one or a combination of at least two of the compounds. The organic light-emitting display panel comprises an anode and a cathode disposed opposite to each other, and an organic layer disposed between the anode and the cathode. The material of the organic layer comprises any one or a combination of at least two of the compounds. The organic light-emitting display device comprises the organic light-emitting display panel. The compound has an energy level difference between a singlet and a triplet states as ?Est?0.30 eV, and, when used in an organic light-emitting display panel, can further increase the luminous efficiency of the device.

Abstract: Embodiments of the present disclosure provide an organic light emitting transistor comprising: a substrate, and a gate electrode, a gate insulating layer, source/drain electrodes and a light emitting functional layer disposed on the substrate, wherein the organic light emitting transistor further comprises an external electrode coupled to the gate electrode in series, wherein a temperature-dependent resistance change rate of the gate electrode is different from a temperature-dependent resistance change rate of the external electrode.

Abstract: Described herein are compounds represented by formula (I?) or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising the same and methods of preparing and using the same. The variables Ar, Ra, Rb, m, n, Y1, Y2, R3 and R4 are defined herein.

Abstract: The present disclosure provides an apparatus for audio signal output. The apparatus may include a bone conduction assembly configured to generate a bone conduction acoustic wave. The apparatus may include an air conduction assembly configured to generate an air conduction acoustic wave, the bone conduction acoustic wave and the air conduction acoustic wave may represent a same audio signal. The apparatus may include a phase difference between bone conduction acoustic wave and the air conduction acoustic wave may be smaller than a threshold. The apparatus may include a housing configured to accommodate at least a portion of the bone conduction assembly and the air conduction assembly.

Abstract: Apparatuses and methods for drying objects are provided. The apparatus can comprise a housing configured to provide an airflow channel having an airflow inlet and an airflow outlet, an airflow generating element configured to effect an airflow through the airflow channel, and one or more radiation energy sources configured to generate infrared radiation and direct the infrared radiation toward an exterior of the housing. At least a portion of at least one of the one or more radiation energy sources does not contact the airflow channel or the airflow, thereby maintaining an operating temperature of the radiation energy source within a predetermined range.

Abstract: Processes for the catalytic conversion of alcohols and/or ethers to olefins over zeolite catalysts are described. Self-bound ZSM-5 and metal containing variants, such as Zn ZSM-5, produce high yields of olefins, particularly C3+ olefins, between 250 and 450° C.

Abstract: The present disclosure discloses an acoustic output apparatus including at least one acoustic driver, a controller, and a supporting structure. The at least one acoustic driver may be configured to output sounds through at least two sound guiding holes. The at least two sound guiding holes may include a first sound guiding hole and a second sound guiding hole. The controller may be configured to control a phase and an amplitude of the sounds generated by the at least one acoustic driver using a control signal such that the sounds output by the at least one acoustic driver through the first and second sound guiding holes have opposite phases. The supporting structure may be provided with a baffle and configured to support the at least one acoustic driver such that the first and second sound guiding holes are located on both sides of the baffle.

Abstract: The present application discloses a case assembly for a server and a server having same. The case assembly (100) is divided into a first case body (10) and a second case body (20) in a first direction, both a side of the first case body (10) that faces the second case body (20) and a side of the second case body (20) that faces the first case body (10) are open, and the first case body (10) and the second case body (20) are detachably connected and jointly define an accommodation space.