Abstract: An electronic limit control method of an electric toothbrush and the electric toothbrush are provided. The electric toothbrush includes a brush head a motor connected to the brush head. A rotating shaft of the motor is configured to drive the brush head to rotate within a predetermined range. The motor of the electric toothbrush is controlled to continuously output a target holding force when the electric toothbrush is in a first state. When an external force applied to the brush head is unable to overcome the target holding force of the motor on the brush head, the brush head is kept in the target position, so that the electric toothbrush is allowed to be used normally in various situations.

Abstract: A CRC rule is generated for each CRC parity check circuit from a bank of CRC parity check circuits for mapping a fixed-length CRC output to a signature, each of the CRC parity check circuits servicing a specific string length. The selected CRC parity circuit outputs a fixed-length parity-check data for the specific data packet, and the string mapper maps the fixed-length parity-check data for the specific data packet to one of the string identifiers associated with the group of signatures. If a fixed-length parity-check match is found, outputting a string identifier of the match for a security action.

Abstract: A sensor for detecting virus, including virus particles and/or genetic sequences, and method of fabrication. The sensor includes a field effect transistor (FET) having source and drain electrodes formed on a substrate and a two-dimensional virus sensing transduction material (VSTM) film formed on the FET. The VSTM film is configured to collect a sample collected from a subject and comprises MXene-graphene. The VSTM film has an antibody corresponding to the virus particles to be detected linked to the film. A drain-source current response of the FET is representative of an amount of the virus particles in the sample for indicating an infection.

Abstract: A brush head and an electric toothbrush are provided. The brush head includes a brush rod, a brush plate, and a soft elastic piece. The brush plate includes a bristle fixing plate and a back plate. The back plate and/or the bristle fixing plate is connected to the brush rod. Bristles are extended from the bristle fixing plate. The back plate is disposed on one side of the bristle fixing plate away from the bristles. A portion of the back plate is spaced apart from the back surface of the bristle fixing plate to define a filling groove. The back plate is connected to the bristle fixing plate through a first connecting end and/or a second connecting end thereof. The soft elastic piece is filled in the filling groove. The soft elastic piece is covered on the back plate and at least a part of the peripheral side surface.

Abstract: A CRC rule is generated for each CRC parity check circuit from a bank of CRC parity check circuits for mapping a fixed-length CRC output to a signature, each of the CRC parity check circuits servicing a specific string length. The selected CRC parity circuit outputs a fixed-length parity-check data for the specific data packet, and the string mapper maps the fixed-length parity-check data for the specific data packet to one of the string identifiers associated with the group of signatures. If a fixed-length parity-check match is found, outputting a string identifier of the match for a security action.

Abstract: A brush head and an electric toothbrush are provided. The brush head includes a brush rod, a brush plate, and a soft elastic piece. The brush plate includes a bristle fixing plate and a back plate. The back plate and/or the bristle fixing plate is connected to the brush rod. Bristles are extended from the bristle fixing plate. The back plate is disposed on one side of the bristle fixing plate away from the bristles. A portion of the back plate is spaced apart from the back surface of the bristle fixing plate to define a filling groove. The back plate is connected to the bristle fixing plate through a first connecting end and/or a second connecting end thereof. The soft elastic piece is filled in the filling groove. The soft elastic piece is covered on the back plate and at least a part of the peripheral side surface.

Abstract: Methods and apparatus for secure networking protocol optimization via NIC hardware offloading. Under a method, security offload entries are cached in a flow table or a security database offload table on a network interface coupled to a host that implements a host security database mapping flows to Security Association (SA) contexts. Each security offload entry includes information identify a flow and information, such as an offset value, to locate a corresponding entry for the flow in the host security database. Hardware descriptors for received packets that belong to flows with matching security offload entries are generated and marked with the information used to locate the corresponding entries in the host security database. The hardware descriptors are processed by software on the host and the location information is used to de-reference the location of applicable entries in the host security database.

Abstract: Disclosed is a construction method for overhead jacking of a multi-track existing railway of a frame bridge. By means of construction modes of transition overhead construction-dewatering construction-formal overhead and two-end opposite jacking and middle cast-in-place, the risk caused by the groundwater level to a dig-hole pile is directly avoided. The overall construction scheme for the overpass pipe section follows the principle of segmented construction and line production, a jacking part of the overpass is firstly constructed, and after the jacking part is in place, a middle frame is cast in place, which guarantees not only the railway operation but also the construction period quality, and thus good economic benefits and construction guidance significance are achieved.

Abstract: In one embodiment, an apparatus of a wireless communication device includes control circuitry to cause receiver circuitry of the wireless communication device to switch between an on-mode and an off-mode. The apparatus also includes synchronizing circuitry to: perform a correlation on signals of a packet received by the receiver circuitry when in the on-mode to detect a pattern in the received signals, and cause the control circuitry to hold the receiver circuitry in the on-mode based on detection of the pattern in the received signals. The apparatus further includes demodulation circuitry to process additional signals of the packet received by the receiver circuitry when held in the on-mode.

Abstract: A system for calorimetry includes a well having a volume for receiving a sample, an input feature to facilitate reception of the sample in the well, a light source to irradiate the well and the sample with incident light, and a photonic sensor chip disposed at the bottom of the well. The photonic sensor chip includes plural nanohole array (NHA) sensors. A light detector is configured to measure transmission of light through the NHA sensors to obtain a series of extraordinary optical transmission (EOT) measurements. Frame elements secure and mutually couple the light source, the photonic sensor chip, the light detector, and the input feature to form a calorimetry unit. A processor is configured to calculate a calorimetry measurement as a function of the series of EOT measurements, the calorimetry measurement being indicative of energy released as a result of the sample in the well undergoing a change.

Abstract: A method and apparatus for synchronizing a wireless communication receiver such as a Bluetooth receiver, including estimating the condition of the communication channel and operating the receiver either in frequency domain mode or in time domain mode based on the channel condition estimation. A soft threshold is used to estimate the symbols of the access address code. Oversampled data rate received data is processed at symbol rate of the data. Receiver functions are terminated upon determining that no signal that the receiver can decode is being received. Synchronization includes a correlator that processes an entire address code or a correlator that processes the address code in segments.

Abstract: For example, a wireless communication device may be configured to determine a count of one or more unreliable data symbols in a received wireless communication packet having a valid Cyclic Redundancy Check (CRC) result; based on the count of the unreliable data symbols, to determine whether to classify the valid CRC result as a false-positive CRC result; and, based on classification of the valid CRC result as a false-positive CRC result, to handle the received wireless communication packet as having a non-valid CRC result.

Abstract: The present disclosure relates to a preparation method and use of a thickness-controllable bismuth nanosheet and its alloy, in order to solve the technical problems that the existing metal catalysts for the conversion of carbon dioxide to formic acid exhibit a low efficiency, a high overpotential, a relatively positive hydrogen evolution potential, and a poor stability. In the present disclosure, a bismuth nanosheet of a single atom layer thickness with a thickness of only 0.7 nm is obtained through an aqueous solution reduction method by using a bismuth salt compound as a raw material, using ethylene glycol ethyl ether as a solvent, and using a highly reductive aqueous solution containing NaBH4, LiBH4 or the like as a reducing agent, under a protection atmosphere of an inert gas.

Abstract: In one embodiment, an apparatus of a wireless communication device includes control circuitry to cause receiver circuitry of the wireless communication device to switch between an on-mode and an off-mode. The apparatus also includes synchronizing circuitry to: perform a correlation on signals of a packet received by the receiver circuitry when in the on-mode to detect a pattern in the received signals, and cause the control circuitry to hold the receiver circuitry in the on-mode based on detection of the pattern in the received signals. The apparatus further includes demodulation circuitry to process additional signals of the packet received by the receiver circuitry when held in the on-mode.

Abstract: A method and apparatus for synchronizing a wireless communication receiver such as a Bluetooth receiver, including estimating the condition of the communication channel and operating the receiver either in frequency domain mode or in time domain mode based on the channel condition estimation. A soft threshold is used to estimate the symbols of the access address code. Oversampled data rate received data is processed at symbol rate of the data. Receiver functions are terminated upon determining that no signal that the receiver can decode is being received. Synchronization includes a correlator that processes an entire address code or a correlator that processes the address code in segments.

Abstract: Methods and apparatus for secure networking protocol optimization via NIC hardware offloading. Under a method, security offload entries are cached in a flow table or a security database offload table on a network interface coupled to a host that implements a host security database mapping flows to Security Association (SA) contexts. Each security offload entry includes information identify a flow and information, such as an offset value, to locate a corresponding entry for the flow in the host security database. Hardware descriptors for received packets that belong to flows with matching security offload entries are generated and marked with the information used to locate the corresponding entries in the host security database. The hardware descriptors are processed by software on the host and the location information is used to de-reference the location of applicable entries in the host security database.

Abstract: For example, a wireless communication device may be configured to determine a count of one or more unreliable data symbols in a received wireless communication packet having a valid Cyclic Redundancy Check (CRC) result; based on the count of the unreliable data symbols, to determine whether to classify the valid CRC result as a false-positive CRC result; and, based on classification of the valid CRC result as a false-positive CRC result, to handle the received wireless communication packet as having a non-valid CRC result.

Abstract: The present disclosure relates to a preparation method and use of a thickness-controllable bismuth nanosheet and its alloy, in order to solve the technical problems that the existing metal catalysts for the conversion of carbon dioxide to formic acid exhibit a low efficiency, a high overpotential, a relatively positive hydrogen evolution potential, and a poor stability. The present disclosure for the first time obtains a bismuth nanosheet of a single atom layer thickness with a thickness of only 0.7 nm through an aqueous solution reduction method by using a bismuth salt compound as a raw material, using ethylene glycol ethyl ether as a solvent, and using a highly reductive aqueous solution containing NaBH4, LiBH4 or the like as a reducing agent, under a protection atmosphere of an inert gas; and the thickness is adjustable. The bismuth nanosheet prepared according to the present disclosure exhibits an excellent CO2 catalytic reduction property.

Abstract: A synchronizer can include a symbol estimator, an inner-pattern de-mapper, a timing tracker, and a correlator. The symbol estimator can be configured to estimate one or more symbols of a received signal based on a phase signal. The inner-pattern de-mapper can be configured to de-map the one or more symbols to generate an inner-pattern de-mapped symbol estimation. The timing tracker can be configured to accumulate the inner-pattern de-mapped symbol estimation and to determine a peak position based on the accumulated inner-pattern de-mapped symbol estimation. The correlator can be configured to correlate the accumulated inner-pattern de-mapped symbol estimation based on a reference signal. The correlation of the accumulated inner-pattern de-mapped symbol estimation can be independent of a signal over sampling rate (OSR). The synchronizer can be adapted in a long range Bluetooth low energy (BLE) receiver.