Abstract: Provided are a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains a non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a difluoroxalate borate anion DFOB; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.5 to 870 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.

Abstract: A lithium secondary battery and an electric device. The lithium secondary battery comprises an electrolyte and a negative electrode sheet, wherein the electrolyte comprises a chain carboxylic ester and a cyclic carbonate, and the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer located on at least one side of the negative electrode current collector. Based on the total mass of the electrolyte, the mass content W1 of the chain carboxylic ester and the mass content W2 of the cyclic carbonate satisfy: 0.1?W2/W1?2, and the mass content W1 of the chain carboxylic ester and the thickness H of the negative electrode film layer satisfy: 0.2?H/100W1?20, with the unit of H being ?m.

Abstract: This application provides a secondary battery and an electric apparatus containing the same. The secondary battery includes a positive electrode plate, a negative electrode plate, and an electrolyte. Porosity of the positive electrode plate is A, porosity of the negative electrode plate is B, and the electrolyte includes a first component. The first component includes one or more compounds represented by formula 1, and a weight percentage of the first component in the electrolyte is D1. The secondary battery satisfies 0.80?A/B?1.20 and 0.14?100D1/B?1.50. The secondary battery of this application can achieve a balance among high energy density, good cycling performance, and good power performance.

Abstract: A battery top cover assembly structure includes a top cover sheet and an electrode column arranged thereon. The top cover sheet is provided with a mounting hole for mounting the electrode column. An insulating part and a plastic part are sleevedly arranged on the electrode column in sequence. The plastic part is embedded in a bottom of the mounting hole. A bottom of the electrode column is fixedly provided on a bottom surface of the plastic part.

Abstract: A sound-producing glasses temple structure and a head-mounted wearable device, the sound-producing glasses temple structure including a glasses temple housing having an accommodating space, and a deformation sleeve and a sound-producing device disposed in the glasses temple housing, wherein the deformation sleeve wraps an outer surface of the sound-producing device, and the deformation sleeve abuts the glasses temple housing and the sound-producing device and is disposed between the glasses temple housing and the sound-producing device so that the sound-producing device is fixedly suspend in the accommodating space. The sound-producing glasses temple structure can effectively prevent abnormal sound that is not produced by the vibration of the sound-producing device.

Abstract: A method for matching left and right channels of an earphone, a clip-on earphone, and a computer-readable storage medium. The method includes: acquiring three-axis acceleration information detected by a three-axis acceleration sensor and detection distance information detected by an infrared distance sensor when it is detected that the target earphone is completely worn, where the target earphone is the first earphone or the second earphone of the clip-on earphone; adjusting the channel of the speaker of the target earphone according to the three-axis acceleration information and the detection distance information, so that the channel of the target earphone matches the wearing position.

Abstract: A method, an apparatus and a device for controlling scene rendering, and a storage medium are provided. The method for controlling scene rendering includes: determining a video perspective descriptor based on an image for a first thread, and determining a tracking and positioning descriptor based on an image for a second thread; matching the video perspective descriptor with the tracking and positioning descriptor; rendering a current virtual space based on a descriptor matching result to obtain a target virtual space; and obtaining a current pose for a target smart device, and determining a real scene image based on the current pose and the target virtual space.

Abstract: Provided is a display panel. In the same shift register unit, an input module receives an input signal and a scan control signal and controls a signal of a first node; a reset module receives a reset clock signal and the scan control signal and controls a signal of a second node; an output module receives the signal of the first node, the signal of the second node, a first level signal, and an output clock signal and outputs a gate drive signal; and the refresh control module controls, according to the first refresh control signal, the time interval of the active level of the gate drive signal output by the shift register unit, and controls, according to the second refresh control signal, the time period of the inactive level of the gate drive signal output by the shift register unit.

Abstract: A method and a device for matching left and right channels of an earphones, a clip-on earphones, and a storage medium. The method includes: obtaining, in response to detecting that the clip-on earphone is worn, three-axis acceleration information detected by the three-axis acceleration sensor; determining corresponding wearing positions of the first earphone and the second earphone according to the three-axis acceleration information; and adjusting, based on the corresponding wearing positions of the first earphone and the second earphone, left and right channels of a speaker of the clip-on earphone so that the left channel corresponds to the earphone in a left ear wearing position, and a right channel corresponds to the earphone in a right ear wearing position.

Abstract: A method for matching left and right channels of earphones, a clip-on earphone, and a computer-readable storage medium. The method includes: obtaining, in response to detecting that the target earphone is worn, three-axis acceleration information detected by the three-axis acceleration sensor and a sensed fingerprint detected by the fingerprint sensor, where the target earphone is a first earphone or a second earphone in the clip-on earphone; and adjusting, according to the three-axis acceleration information and the sensed fingerprint, a channel of a speaker of the target earphone to make a channel of the target earphone match a wearing position.

Abstract: A digital speckle based online water wall stress monitoring method and device, and the method includes the following steps: arrange an online stress monitoring device on the side of the water wall to be monitored; determine a plurality of monitoring points according to the area of the water wall, and set the motion track of the online stress monitoring device for speckle image acquisition according to the determined monitoring points; acquire the real-time speckle image of each monitoring point in real time after acquiring the initial speckle image of each monitoring point; compare the real-time speckle images with the initial speckle images, and determine whether the stress of the water wall changes according to the comparison results. The invention adopts non-contact digital image technology, and determines the difference between the real-time and initial speckle images of the water wall to realize the stress monitoring.

Abstract: The present application provides smart glasses. The smart glasses include a support member, an imaging device and an antenna mounted on the support member; the antenna includes an antenna body and a coaxial line electrically connected to the antenna body; the coaxial line is provided with a shielding layer; the support member has electrical conductivity, and the coaxial line is fixed to the support member; the shielding layer is electrically connected to the support member so as to realize grounding of the antenna.

Abstract: Provided are a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains a non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a difluorooxalate borate anion DFOB?; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.5 to 870 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.

Abstract: A server of a system is configured to transmit a message from a first device that includes a conference identifier (ID) and a user ID to a second device to connect the second device to an ongoing audio conference bridge call without interrupting the audio conference bridge call. By providing the conference ID and the user ID, host privileges associated with the user associated with the user ID are transferred to the second device. By transferring the host privileges to the second device, the user can, via the second device, view the participant roster and add or remove participants from the audio conference bridge call.

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes lithium salt, the lithium salt includes lithium hexafluorophosphate, and a mass proportion of the lithium hexafluorophosphate relative to a total mass of the electrolyte is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

Abstract: A cell and an assembly method thereof. The cell has an elongated structure with a positive electrode end and a negative electrode end. The negative electrode end is provided with a liquid injection hole, a tab protector and a single-cell collection board. A negative electrode column is connected to a negative tab on a cell core set through an aluminum plate, which is bendable to be accommodated into an accommodating cavity. The liquid injection hole is sunk into an avoidance hole on a top frame plate of the tab protector to clamp the tab protector. The electrolyte flows through the accommodating cavity to fill a core cavity, and the liquid injection hole is sealed by a sealing mechanism including a steel ball welded in the liquid injection hole and a structural adhesive filled in the recess.

Abstract: An adjusting mechanism is disclosed. The adjusting mechanism includes, but is not limited to, a middle shell and a foam support. The adjusting mechanism further includes, but is not limited to a sliding module movably arranged in the middle shell, connected with the foam support, and configured to adjust a horizontal spacing between the middle shell and the foam support. The adjusting mechanism still further includes, but is not limited to, a flipping module rotatably arranged on the sliding module, connected with the foam support, and configured to drive the foam support to flip relative to the middle shell.

Abstract: The present application discloses an electrolyte solution, a battery and an electrical device. The electrolyte solution includes a first additive, a second additive and a third additive. The first additive includes a sulfate ester compound. The second additive includes: where Z1-Z4 each independently include an oxygen atom or a sulfur atom. The third additive includes at least one of fluorosulfonate, tetrafluoroborate, difluorophosphate, difluoro(oxalato)borate, bis(oxalato)borate and difluorobis(oxalato)phosphate. Based on the total mass of the electrolyte solution, content W1 of the first additive, content W2 of the second additive and content W3 of the third additive satisfy W1:W2:W3=1:(0.1-1.5):(0.02-2.5).

Abstract: A trajectory tracking control method for the unmanned helicopter based on the filter observer is provided. This method establishes a position system model of the disturbed unmanned helicopter including a lumped disturbance term and a measurement noise term, then, the state vector is constructed based on the actual position and actual speed of the unmanned helicopter, the position system model of the disturbed unmanned helicopter is transformed into the system state equation based on the state vector, according to the system state equation, the filter observer is designed based on the continuous-time Kalman filter, and the composite PID controller is designed for the position system model of the disturbed unmanned helicopter, the trajectory tracking control of the disturbed unmanned helicopter using the composite PID controller combined with the filter observer can perform dynamic real-time feedforward compensation for the lumped disturbance and achieve effective suppression of the measurement noise.

Abstract: An electrolyte for a lithium-ion battery is disclosed. The electrolyte includes AxOyZ? and PO2F2?, where A includes at least one of phosphorus (P), sulfur(S), or silicon (Si), with 1?x?2, 4?y?5, and 2?z?3. The electrolyte may optionally contain a film-forming additive. When used in a lithium-ion battery, the electrolyte reduces the growth rate of direct current resistance (DCR) during charge and discharge cycles, thereby enhancing power performance. Also disclosed is a battery containing the electrolyte, where the battery comprises positive and negative electrode plates with defined particle size, surface area, and compacted density parameters. An electric device including the battery is also provided.