Abstract: A forward and reverse bidirectional flow rate measurement method for a subsea chemical agent injection device is provided. The device includes a device body, a flow channel is formed inside the device body, the device body includes an agent input connector, a pressure reduction member, a needle valve assembly, and an agent output connector that are sequentially communicated through the flow channel; and the method is implemented by: calibrating forward and reverse flow of agents at different openings and flow rates, then obtaining differential pressures before and after the agents flow through the needle value assembly; fitting relationships between the flow rates and the differential pressures at different openings to obtain a plurality of arrays of opening-flow coefficients; then fitting relationships between the flow coefficients and the needle valve openings to establish a formula for the flow rate and the opening-differential pressure, and finally performing the measurement in real time.

Abstract: A gamepad (100) for a head-mounted device, and a head-mounted device are provided. The gamepad (100) includes: a housing (10); a processor (11), wherein the processor (11) is arranged inside the housing (10), and the processor (11) is in signal transmission with a host of the head-mounted device; a driving apparatus (20), wherein the driving apparatus (20) is arranged inside the housing (10), and the driving apparatus (20) is electrically connected to the processor (11) to receive an instruction signal transmitted by the processor (11); and a vibration apparatus (30), wherein the vibration apparatus (30) is arranged inside the housing (10); the vibration apparatus (30) has various different vibration frequencies; and the driving apparatus (20) is connected to the vibration apparatus (30) to control, according to the received instruction signal, the vibration apparatus (30) to vibrate at the corresponding vibration frequencies.

Abstract: Embodiments of this application provide a code scanning method and an electronic device. The method is applicable to the electronic device. The electronic device includes a camera. The method includes: The electronic device displays a code scanning interface, and then obtains an identification frame image and a preview frame image, where the identification frame image and the preview frame image are obtained by processing a code scanning image collected by the camera. The electronic device displays the preview frame image in the code scanning interface. The electronic device conducts, in a case that ambient light brightness of the identification frame image is greater than or equal to a threshold, code scanning identification on the identification frame image, and determines a code scanning identification result. According to the method, an invalid identification frame image is deleted, to improve code scanning efficiency.

Abstract: The application provides a vibration motor control circuit and a control method and a device thereof, the control circuit includes: a controller, a driver, a switch component, and a vibration motor; a first terminal of the switch component is connected with one terminal of the vibration motor, a second terminal of the switch component is connected with another terminal of the motor and a first output terminal of the driver, a third terminal of the switch component is connected with a second output terminal of the driver; a first output terminal of the controller is connected with an input terminal of the driver, a second output terminal of the controller is connected with the first terminal of the switch component, to transmit a control instruction to the first terminal of the switch component after the motor stops vibrating.

Abstract: A nonaqueous electrolyte for a lithium ion battery includes a lithium salt, a first nonaqueous solvent, and an additive mixture comprising a first operative additive of lithium difluorophosphate and a second operative additive of either fluoro ethylene carbonate or vinylene carbonate. A lithium-ion battery includes a negative electrode, a positive electrode comprising NMC with micrometer-scale grains, a nonaqueous electrolyte having lithium ions dissolved in a first nonaqueous solvent, and an additive mixture having a first operative additive of either fluoro ethylene carbonate or vinylene carbonate and a second operative additive of either 1,3,2-dioxathiolane-2,2-dioxide, another sulfur-containing additive, or lithium difluorophosphate.

Abstract: The method includes: a primary terminal may select a target secondary terminal from at least one secondary terminal when detecting that the primary terminal currently runs a power consuming process and/or will run a power consuming process, and migrate the currently running power consuming process and/or the to-be-run power consuming process to the target secondary terminal.

Abstract: A probe comprising a biomarker-triggered moiety, a near infrared (NIR) fluorophore reporter, a self-immolative linker and a self-immobilizing moiety for visualization of senescent cells and methods of use thereof.

Abstract: A nonaqueous electrolyte for a lithium ion battery includes a lithium salt, a first nonaqueous solvent, and an additive mixture comprising a first operative additive of lithium difluorophosphate and a second operative additive of either fluoro ethylene carbonate or vinylene carbonate. A lithium-ion battery includes a negative electrode, a positive electrode comprising NMC with micrometer-scale grains, a nonaqueous electrolyte having lithium ions dissolved in a first nonaqueous solvent, and an additive mixture having a first operative additive of either fluoro ethylene carbonate or vinylene carbonate and a second operative additive of either 1,3,2-dioxathiolane-2,2-dioxide, another sulfur-containing additive, or lithium difluorophosphate.

Abstract: Improved battery systems have been developed for lithium-ion based batteries. The improved battery systems consist of two-additive mixtures in an electrolyte solvent. Such battery systems are prepared by assembling a positive electrode and a negative electrode in the sealed cell, removing residual water from the sealed cell, filling the sealed cell with a nonaqueous electrolyte under an inert atmosphere, vacuum-sealing the sealed cell, carrying out a formation process comprising charging and discharging the sealed cell until the sealed cell achieves an initial capacity. The nonaqueous electrolyte includes lithium ions, a first nonaqueous solvent comprising a carbonate solvent, a second nonaquaeous solvent comprising methyl acetate, and an additive mixture of a first operative additive of either vinylene carbonate or fluoroethylene carbonate and a second operative additive of 2-furanone. Gas formation is suppressed in the battery system during the formation process.

Abstract: Improved battery systems have been developed for lithium-ion based batteries. The improved battery systems consist of two-additive mixtures in an electrolyte solvent. Such battery systems are prepared by assembling a positive electrode and a negative electrode in the sealed cell, removing residual water from the sealed cell, filling the sealed cell with a nonaqueous electrolyte under an inert atmosphere, vacuum-sealing the sealed cell, carrying out a formation process comprising charging and discharging the sealed cell until the sealed cell achieves an initial capacity. The nonaqueous electrolyte includes lithium ions, a first nonaqueous solvent comprising a carbonate solvent, a second nonaquaeous solvent comprising methyl acetate, and an additive mixture of a first operative additive of either vinylene carbonate or fluoroethylene carbonate and a second operative additive of 2-furanone. Gas formation is suppressed in the battery system during the formation process.

Abstract: The present application discloses a positive electrode active material, comprising a lithium nickel manganese oxide modified material and a coating layer on the surface of the lithium nickel manganese oxide modified material. The lithium nickel manganese oxide modified material is a primary particle with a core-shell-like structure comprising a spinel phase and a rocksalt-like structure phase. The spinel phase is an inner core, and the rocksalt-like structure phase constitutes an outer shell. The rocksalt-like structure phase is further doped with a phosphorus element and the phosphorus element is distributed in a gradient from the outer surface to the interior of the rocksalt-like structure phase. The present application further discloses a preparation method of the positive electrode active material, a positive electrode containing the positive electrode active material for lithium-ion secondary batteries, and a lithium ion secondary battery.

Abstract: A method for locating a VR device and a VR device is applied to a head-mounted displaying device of the VR device, and includes: sending a locating and synchronizing signal to the handle at a first preset interval, so that the handle controls each of LED lights of the LED light ring according to the locating and synchronizing signal to lighten for a first preset duration; simultaneously while the head-mounted displaying device is sending the locating and synchronizing signal, controlling, by the head-mounted displaying device, the camera to expose for a second preset duration to photograph the handle to obtain at least one locating photograph, wherein a starting time of the second preset duration is earlier than a starting time of the first preset duration, and the second preset duration is longer than the first preset duration; and determining spatial-position information of the handle according to the locating photograph.

Abstract: A method for locating a VR device and a VR device is applied to a head-mounted displaying device of the VR device, and includes: sending a locating and synchronizing signal to the handle at a first preset interval, so that the handle controls each of LED lights of the LED light ring according to the locating and synchronizing signal to lighten for a first preset duration; simultaneously while the head-mounted displaying device is sending the locating and synchronizing signal, controlling, by the head-mounted displaying device, the camera to expose for a second preset duration to photograph the handle to obtain at least one locating photograph, wherein a starting time of the second preset duration is earlier than a starting time of the first preset duration, and the second preset duration is longer than the first preset duration; and determining spatial-position information of the handle according to the locating photograph.

Abstract: The method includes: a primary terminal may select a target secondary terminal from at least one secondary terminal when detecting that the primary terminal currently runs a power consuming process and/or will run a power consuming process, and migrate the currently running power consuming process and/or the to-be-run power consuming process to the target secondary terminal.

Abstract: A method for adjusting an interface scrolling speed, a terminal, a storage medium, and a computer program product are disclosed. The method includes: obtaining a sliding operation performed by a user on a touchscreen, determining a type of the user based on a sliding speed of the sliding operation, increasing an interface scrolling speed, when the type of the user is a user that operates a mobile phone fast, decreasing the interface scrolling speed, when the us type of the user is a user that operates a mobile phone slowly, recording an interface scrolling speed parameter, adjusting a scrolling speed of an interface based on the interface scrolling speed parameter.

Abstract: A respiratory protection filter includes filtration media. The filtration media includes an iron-doped manganese oxide material having an average pore size (BJH method) in a range from 1 to 4 nm and a surface area (BET) of at least 300 m2/g, or at least 350 m2/g, or at least 400 m2/g.

Abstract: A nonaqueous electrolyte for a lithium ion battery includes a lithium salt, a first nonaqueous solvent, and an additive mixture comprising a first operative additive of lithium difluorophosphate and a second operative additive of either fluoro ethylene carbonate or vinylene carbonate. A lithium-ion battery includes a negative electrode, a positive electrode comprising NMC with micrometer-scale grains, a nonaqueous electrolyte having lithium ions dissolved in a first nonaqueous solvent, and an additive mixture having a first operative additive of either fluoro ethylene carbonate or vinylene carbonate and a second operative additive of either 1,3,2-dioxathiolane-2,2-dioxide, another sulfur-containing additive, or lithium difluorophosphate.

Abstract: A method for adjusting an interface scrolling speed, a terminal, a storage medium, and a computer program product are disclosed. The method includes: obtaining a sliding operation performed by a user on a touchscreen, determining a type of the user based on a sliding speed of the sliding operation, increasing an interface scrolling speed, when the type of the user is a user that operates a mobile phone fast, decreasing the interface scrolling speed, when the us type of the user is a user that operates a mobile phone slowly, recording an interface scrolling speed parameter, adjusting a scrolling speed of an interface based on the interface scrolling speed parameter.

Abstract: Improved battery systems with two-additive mixtures including in an electrolyte solvent that is a carbonate solvent, an organic solvent, a non-aqueous solvent, methyl acetate, or a combination of them. The positive electrode of the improved battery systems may be formed from lithium nickel manganese cobalt compounds, and the negative electrode of the improved battery system may be formed from natural or artificial graphite.

Abstract: Improved battery systems have been developed for lithium-ion based batteries. The improved battery systems consist of two-additive mixtures in an electrolyte solvent. Such battery systems are prepared by assembling a positive electrode and a negative electrode in the sealed cell, removing residual water from the sealed cell, filling the sealed cell with a nonaqueous electrolyte under an inert atmosphere, vacuum-sealing the sealed cell, carrying out a formation process comprising charging and discharging the sealed cell until the sealed cell achieves an initial capacity. The nonaqueous electrolyte includes lithium ions, a first nonaqueous solvent comprising a carbonate solvent, a second nonaquaeous solvent comprising methyl acetate, and an additive mixture of a first operative additive of either vinylene carbonate or fluoroethylene carbonate and a second operative additive of 2-furanone. Gas formation is suppressed in the battery system during the formation process.