Abstract: Techniques and apparatuses are described that implement a hearable with on-head detection using a single optical sensor. The hearable determines on-head detection based on a distance measured by the single optical sensor being less than a distance limit associated with on-head detection. A shape of the hearable's housing causes the hearable to have at least one orientation while at static equilibrium on a flat surface. This orientation causes the flat surface to be within the field-of-view of the optical sensor and causes a distance between the flat surface and the optical sensor to be greater than the distance limit associated with on-head detection. In this way, false positives associated with on-head detection can be mitigated without adding additional sensors (e.g., another infrared sensor, another proximity sensor, or a motion sensor) and without utilizing more complex optical sensors that determine additional information about the object, such as material composition.

Abstract: A trusted anonymous voting method includes: performing a hash operation on original voting content to obtain a hash output including a commitment value cvi; blinding the commitment value cvi based on information of other voters to obtain commitment value tuples {tilde over (c)} and {tilde over (x)}; signing the commitment value tuple {tilde over (c)} by using an ESDSA to obtain a signature tuple {tilde over (s)}; and establishing a vote tuple ({tilde over (c)}, {tilde over (s)}, {tilde over (d)}) based on the commitment value tuple {tilde over (c)}, the signature tuple {tilde over (s)} and a signature tuple {acute over (d)} of other voters, and uploading the vote tuple (?, ?, {acute over (d)}) and the commitment value tuple {tilde over (x)} to the blockchain, where signature tuple {tilde over (d)} is generated in a case that other voters verify the signature tuple {tilde over (s)} and the signature tuple {tilde over (s)} passes the verification, and the commitment value tuple {tilde over (x)} is used to decry

Abstract: A timestamp generation method and apparatus, and an electronic device and a storage medium, which are used for solving the technical problem of recorded information being easily leaked because a trusted third party is usually needed as a timestamp authority for recording in a traditional trusted timestamp generation method. In the present invention, the method comprises: acquiring a file record; calculating a hash value of the file record; sending the hash value to a random issuer, and receiving a signature result returned by the random issuer, wherein the signature result is generated after the random issuer signs the hash value and a receiving time, and the receiving time is the time when the random issuer receives the hash value; and storing the signature result in a blockchain as a timestamp of the file record.

Abstract: A filter and array of filters providing inductive coupling are disclosed. According to one aspect, an RF filter includes a plurality of dielectric layers with a first ground plane on one side of the dielectric layers and a second ground plane on an opposite side of the dielectric layers. One of the first and second ground planes provides an input port and one of the first and second ground planes provides an output port. Two parallel strip line resonators, lie in a first plane parallel to, and between, the first and second ground planes, the two parallel strip line resonators, having a gap there between. An inductive coupling plate in proximity to the gap, is grounded at an edge and lies in a second plane, the second plane parallel to the first plane and lying between the first plane and one of the first and second ground planes.

Abstract: A low-voltage user demand response interaction apparatus and an operation method therefor. The apparatus comprises an electrical loop, a mechanical switch, a protection module, a data collection module, a control processor, a power supply module, a communication module, a load identification module, a blockchain module and a demand response module, wherein the mechanical switch is connected to the electrical loop; the protection module is connected to the mechanical switch; the control processor is connected to the protection module; the load identification module, the blockchain module and the demand response module are respectively connected to the control processor; the data collection module is connected to the electrical loop, and transmits data to the control processor; and the communication module and the power supply module are respectively connected to the control processor.

Abstract: Embodiments of an Antenna and Filter Unit (AFU) for an Advanced Antenna System (AAS) are disclosed herein. In one embodiment, an AFU for an AAS comprises a first unit and a second unit. The first unit comprises a 1:N power splitter comprising an input coupled, directly or indirectly, to an antenna port of the AFU and N outputs, where N?2. The first unit also comprises N first board-to-board type connectors electrically connected to the N outputs of the 1:N power splitter, respectively. The second unit comprises N second board-to-board type connectors configured to be electrically coupled to the N first board-to-board type connectors, respectively, and N antenna elements coupled, directly or indirectly, to the N second board-to-board connectors, respectively. By positioning the 1:N power splitter prior to the N first and N second board-to-board type connectors, input power at each of the board-to-board type connectors is reduced, which thereby reduces Passive Intermodulation.

Abstract: Hybrid structures, filters and duplexers are disclosed. According to one aspect, a radio frequency (RF) duplexer includes a common resonator coupled to at least one chamber of an air cavity filter, a first ceramic waveguide filter. CWGF, having a first opening in a first CWG wall of the first CWGF, the first opening at least partially aligned with a first window of the common resonator to couple energy between the common resonator and the CWGF, and a second CWGF having a second opening in a second CWG wall of the second CWGF, the second opening at least partially aligned with the second window of the common resonator to couple energy between the air cavity resonator and the CWGF.

Abstract: The present application discloses an improved top sheet, referred to as Top Pocket Sheet (TPS). The TPS comprises a pocket for holding a comforter or blanket so that the comforter or blanket stays with the top sheet during a night of sleep. The pocket can be permanently or temporarily formed. The pocket can be secured to the top sheet via different means.

Abstract: A composite electronic device comprises a ceramic waveguide, CWG, device having at least two input/output, I/O, ports; and a ceramic stripline, CS, device comprising at least one stripline transmission paths having at least two I/O ports. The CS device is affixed to the CWG device such that at least one of the I/O ports of the CWG device is electrically connected to a corresponding one I/O port of the CS device.

Abstract: Disclosed in the present invention is a multi-target simultaneous charging method for a lithium battery pack: converting energy loss and charging current into a lithium battery pack charging cost model with a charging weight coefficient, and using an interior point method for solving and processing to acquire a preset charging current sequence; on the basis of the preset charging current sequence, calculating the charging time required when charging the lithium battery pack, and adjusting the charging weight coefficient in the lithium battery pack charging cost model by means of an adaptive momentum gradient descent algorithm to obtain the charging weight coefficient with the shortest charging time; using the charging weight coefficient to optimize the lithium battery pack charging cost model to acquire a new preset charging current sequence; and using the new preset charging current sequence to implement charging, thereby implementing optimized multi-target simultaneous charging of the lithium battery pack.

Abstract: Methods and apparatuses are provided for a matched band pass filter utilized in a duplexer or multiplexer. In one embodiment, the matched band pass filter includes a filter part and a port-matching part that is coupled to and in signal communication with the filter part. The filter part is configured to filter an RF signal and includes an input port. The port-matching part includes an output port. The port-matching part is configured to provide impedance matching through the output port.

Abstract: A camera assembly includes an image sensor having a field of view corresponding to a scene, an infrared (IR) illuminator configured to selectively illuminate the scene, and a single-piece cover element positioned in front of the image sensor and the IR illuminator such that light from the IR illuminator is directed through the cover element along a first light path and light from the scene passes through the cover element along a second light path prior to entering the image sensor, the cover element including a first portion between the first light path and the second light path, the first portion being substantially opaque to IR and/or visible light.

Abstract: The present invention relates to a process for the preparation of a top-gate, bottom-contact organic field effect transistor on a substrate, which organic field effect transistor comprises source and drain electrodes, a semiconducting layer, a cured first dielectric layer and a gate electrode, and which process comprises the steps of: i) applying a composition comprising an organic semiconducting material to form the semiconducting layer, ii) applying a composition comprising a first dielectric material and a crosslinking agent carrying at least two azide groups to form a first dielectric layer, iii) curing portions of the first dielectric layer by light treatment, iv) removing the uncured portions of the first dielectric layer, and v) removing the portions of the semiconducting layer that are not covered by the cured first dielectric layer, wherein the first dielectric material comprises a star-shaped polymer consisting of at least one polymer block A and at least two polymer blocks B, wherein each polymer b

Abstract: The present invention relates to video processing, and provides a method for detecting and reducing video flicker. The method for detecting video flicker includes steps of: calculating the line sums of the luminance components of two adjacent frames in a video frame sequence; comparing the line sums of the luminance components of the two adjacent frames, and calculating a flicker component; obtaining the light source flicker frequency according to an assumed k value; determining two different local intervals by the coordinates of a current point of the flicker component according to the light source flicker frequency; and respectively calculating a peak function and a valley function of the flicker component in the two different local intervals; and determining whether there is video flicker caused by the light source in the current frame according to the peak function and the valley function of the flicker component.

Abstract: A composite electronic device comprises a ceramic waveguide, CWG, device having at least two input/output, I/O, ports; and a ceramic stripline, CS, device comprising at least one stripline transmission paths having at least two I/O ports. The CS device is affixed to the CWG device such that at least one of the I/O ports of the CWG device is electrically connected to a corresponding one I/O port of the CS device.

Abstract: The present invention relates to a process for the preparation of a top-gate, bottom-contact organic field effect transistor on a substrate, which organic field effect transistor comprises source and drain electrodes, a semiconducting layer, a cured first dielectric layer and a gate electrode, and which process comprises the steps of: i) applying a composition comprising an organic semiconducting material to form the semiconducting layer, ii) applying a composition comprising a first dielectric material and a crosslinking agent carrying at least two azide groups to form a first dielectric layer, iii) curing portions of the first dielectric layer by light treatment, iv) removing the uncured portions of the first dielectric layer, and v) removing the portions of the semiconducting layer that are not covered by the cured first dielectric layer, wherein the first dielectric material comprises a star-shaped polymer consisting of at least one polymer block A and at least two polymer blocks B, wherein each polymer b