Abstract: An online measurement method for temperature stability of production layers in an oil and gas well includes: obtaining a plurality of temperature data at each position point of an optical fiber; according to the temperature data, calculating temperature standard deviations of each position point within a production layer at a plurality of time points; performing probability distribution statistics according to the temperature standard deviations at all position points of the production layer at a same time point, fitting a probability distribution curve according to normal distribution, and obtaining a probability density function; obtaining the temperature standard deviations corresponding to at least one value that integral values of the probability density function at all position points of the production layer at each time point is between (0, 1), generating a standard temperature deviation normal distribution probability time curve of each section of the production layer according to the temperature stan

Abstract: An alkali metal reactor power supply, including: a reactor vessel, the bottom part of which is provided with a liquid alkali metal; a reactor core, which is arranged in the reactor vessel and includes a plurality of fuel rods and a radial reflection layer arranged at the periphery of the plurality of fuel rods, wherein the surface of each fuel rod is provided with a first liquid absorption core, the bottom part of the reactor core is provided with second liquid absorption cores which are connected to the first liquid absorption cores, and the second liquid absorption cores can be in contact with the liquid alkali metal; and alkali metal thermoelectric converters, which are arranged along the circumferential direction of the radial reflection layer, and divide the inside of the reactor vessel into a high-pressure steam chamber located above the alkali metal thermoelectric converters and a low-pressure steam chamber located below the alkali metal thermoelectric converters.

Abstract: A battery pack is provided. The battery pack includes a housing, a plurality of battery sets arranged in the housing, and a power supply system. The power supply system includes a switch control circuit for controlling a series-parallel connection mode of the plurality of battery sets, a main control chip for controlling the discharge of the plurality of battery sets by the switch control circuit, a wake-up circuit for waking up the power supply system of the battery pack when the main control chip receives a wake-up signal, a self-locking circuit connected to the switch control circuit which switches to a disabled state when the self-locking circuit is triggered; and a USB circuit and an extended power output interface, connected to the plurality of battery sets for outputting power to charge external devices.

Abstract: This application discloses a method, apparatus and storage medium for application identification. A network device performs flow behavior feature analysis according to a flow table to obtain a plurality of services. Each service includes one IP address and one port identifier, and one application may usually include a group of services. Therefore, the network device clusters the plurality of services according to the flow table and a domain name table, to obtain a plurality of application types. Each application type includes a plurality of services. Each application type corresponds to one application. Further, the network device may determine a label corresponding to each of the plurality of application types, the label identifying an application to which a data flow belongs.

Abstract: Provided are a method for calibrating sensors in a vending machine and a vending machine. input values of first input terminals and input values of second input terminals of sensors are determined through level 1 calibration and level 2 calibration, respectively, which may greatly increase the number of adjustable grades of the luminous intensity of an optical generator of each sensor, and may further greatly improve the success rate of calibration on the sensors.

Abstract: The present disclosure provides a battery pack power supply system and a battery pack power supply method.

Abstract: Disclosed herein are non-aqueous compositions including: a flowable Part A including at least one resin and Reactant A; and a flowable Part B including at least one resin and Reactant B; wherein at least one of flowable Part A and flowable Part B further includes a free radically polymerizable resin; wherein at least one of flowable Part A and flowable Part B further includes a free radical initiator system; wherein flowable Part A and flowable Part B are capable of being mixed to provide a flowable mixed composition; wherein when flowable Part A and flowable Part B are mixed, Reactant A and Reactant B are capable of interacting to cause a non-free radical reaction within a first staging time to provide a first staged stable consistency for the mixed composition; wherein Reactant A comprises an acid and Reactant B comprises a base, and upon mixing flowable Part A and flowable Part B, the Reactant A acid is capable of reacting with the Reactant B base in an ionic acid-base reaction; and wherein the mixed compo

Abstract: A modular multilevel converter (MMC) includes an input conversion module, an output conversion module, a common conversion module, and a common bridge arm. One end of the input conversion module is connected to Vin, the other end of the input conversion module is connected to the common conversion module through the common bridge arm, and the common conversion module is connected to Vin and Vout. One end of the output conversion module is connected to the common conversion module through the common bridge arm, and the other end of the output conversion module is connected to Vout. The input conversion module and the output conversion module share one bus capacitor.

Abstract: The present disclosure relates to a method of preparing a nano-porous powder material. The method includes: firstly removing A in the alloy AxTy by using an ultrasonically-assisted de-alloying method to prepare a nano-porous T coarse powder, and then, allowing the nano-porous T coarse powder to perform M-ization reaction with a gas reactant containing M to obtain a nano-porous T-M coarse powder, and finally, further crushing the nano-porous T-M coarse powder using a jet mill to obtain a nano-porous T-M fine powder. The method can achieve low-cost mass production of the nano-porous T-M fine powder, bringing broad application prospects.

Abstract: Disclosed are a cash box and a cash recycling and handling device; the cash box includes a box body, a first cash storage cavity, a second cash storage cavity, a transfer passage, a first switching member and a linkage assembly; a first lifting platform is provided inside the first cash storage cavity, and the first lifting platform is capable of moving back and forth in the preset direction and can be located at a first dispensing position; when the first lifting platform is in the first dispensing position, it is engaged with the linkage assembly to rotate the first switching member to a first position, and when the first lifting platform moves to a first inlet, the linkage assembly rotates the first switching member to a second position.

Abstract: A sheet-type medium accumulating and separating device includes a frame and a paper pressing mechanism. The frame is provided with an storage cavity for accommodating sheet-type media. The storage cavity is provided with a paper inlet, a paper outlet, and a paper kicking roller. A paper supporting plate for supporting the media is further provided in the storage cavity. The paper pressing mechanism includes a paper pressing plate and a driving assembly. The paper pressing plate is provided with a first position and a second position arranged in the direction of stacking. The paper pressing plate includes a paper pressing part arranged within the storage cavity. The driving assembly is in transmission connection with the paper pressing plate. When the paper pressing plate is in the first position, the paper pressing part is adjacent to the paper outlet, to press the sheet-type media towards the paper kicking roller.

Abstract: Disclosure is a multi-voltage battery pack which includes: a housing, battery strings disposed inside the housing and including a plurality of battery cells, a battery interface disposed on the housing for use with the power tool, and a converting assembly disposed within the housing and electrically connected to the battery strings. The converting assembly has a first state, a second state, and a third state. The multi-voltage battery pack can separately output a first operating voltage, a second operating voltage, and a third operating voltage. The third operating voltage is greater than the second operating voltage, and the second operating voltage is greater than the first operating voltage.

Abstract: The disclosure provides a charger, a charging device, an energy supply device and a control method of the charger. The charger comprises a housing, a charging position, a charging port and a first heat dissipation unit. The charger comprises a base and a supporting part. The supporting part is arranged on the base. The charging position is arranged on the base and distributed around the supporting part. The charging port is arranged on the charging position and matched with a battery pack. The first heat dissipation unit is arranged on the supporting part for heat dissipation of the battery pack. With the charger of the disclosure, multiple battery packs can be charged at the same time.

Abstract: The present invention discloses a foldable trolley with convenient folding structure, comprising an tipper folding frame, a lower folding frame and a supporting rod assembly. Sliding ends of both the front and rear sliding upright rods slide closely or backwardly as the lower folding frame is folded or expanded, thus to form a triangular support arm structure, thereby strengthening the stability of overall structure. Besides, a folding lock-release mechanism is provided, when the foldable frame is expanded, the front and rear locking assemblies thereof respectively limit the front and rear sliding upright rods to slide; when the foldable frame is folded, the front and rear locking assemblies release limitation of the front and rear sliding upright rods respectively through the unlocking assembly. The foldable frame can be folded by simply lifting the upper connecting rod up, thus one key locking or unlocking is achieved, and the operation is convenient.

Abstract: A hands-free apparatus includes a memory, and a hardware processor coupled to the memory. The hardware processor is configured to: perform a hands-free connection process of connecting to a mobile phone by using a hands-free communication protocol for performing a hands-free phone conversation; perform a first data transfer process of making a first connection with the mobile phone by using a data transfer protocol for transferring phone data related to phone, and causing the phone data to be automatically or manually transferred from the mobile phone; and depending on a status of a different data transfer process than the first data transfer process, perform transfer control related to transfer by at least one of the first data transfer process and the different data transfer process.

Abstract: This application discloses a non-current equalization UPS apparatus, a current distribution method, and a parallel UPS system. The current distribution method may be applied to any UPS apparatus in a parallel UPS system. A current proportion of a first current output by the any UPS apparatus in a total output current of the parallel UPS system is positively related to a capacity proportion of an available battery capacity of a battery string correspondingly connected to the any UPS apparatus in a total available battery capacity of the parallel UPS system. Therefore, a system backup time of the parallel UPS system can be prolonged, and resource utilization of a battery string with a large available battery capacity can be improved.

Abstract: A tunable microwave source based on dual-wavelength lasing of a single optical whispering gallery microcavity includes a dual-wavelength laser having the single optical whispering gallery microcavity for generating dual-wavelength lasing with adjustable spacing, narrow linewidth and low threshold; an optical fiber or waveguide amplifier for optical signal amplification; an optical filter for optical signal and noise filtration; and a high-speed detector for generating a tunable microwave signal with narrow bandwidth. The dual-wavelength laser includes a pump source, the optical whispering gallery microcavity, an optical waveguide or a tapered optical fiber, a microcavity substrate, and a gold electrode pair. The frequency spacing of the dual-wavelength lasing is tuned by adjusting the external voltage of the gold electrode pair.

Abstract: This application provides an uninterruptible power supply. An input end of the uninterruptible power supply is connected to a power supply by using a first on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a first control signal sent by the first on-off control module, control a current in a circuit connecting the uninterruptible power supply and the first on-off control module to be zero. An output end of the uninterruptible power supply is connected to a load by using a second on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a second control signal sent by the second on-off control module, control the uninterruptible power supply to be turned off.

Abstract: A power switching device, an electric energy storage system and an electric tool system are provided. The power switching device includes a plug connected to a power supply device and including an output terminal; and a power switching assembly connected to the plug and including a power switching member, the switching member is used for switching a coupling form of the plug. The power switching assembly further includes a control member for controlling the power switching assembly to move between different switching positions. The control member includes a switching button, and the switching position of the power switching assembly is switched by pressing the switching button.

Abstract: Provided are a transmission mechanism, a sheet-type medium processing device, and an automatic teller machine. The transmission mechanism includes a first frame (100), a second frame (200), and a transmission assembly; the transmission assembly includes a mounting frame (310), a first transmission member (330), a second transmission member (340), and an elastic member (320). The mounting frame (310) is movably disposed on the first frame (100), the first transmission member (330) is disposed on the mounting frame(310), the second transmission member (340) is disposed on the second frame (200), the elastic member (320) is connected between the mounting frame (310) and the first frame (100), and the elastic member (320) is configured to enable the mounting frame (310) to drive the first transmission member (330) to move in a set direction, so that the first transmission member (330) is mated with the second transmission member (340).