Abstract: The present disclosure provides a mounting stand which is configured for mounting a component on the floor or on the wall comprising a bracket, at least two rotating rackets connected to the fixing bracket separately and being on opposite sides of the fixing bracket, and a back plate detachably disposed on the fixing bracket and the at least two rotating brackets. The present disclosure further provides a battery assembly and an energy storage system comprising the mounting stand. The mounting stand is adapted for conveniently accepting a floor-mounted method and a wall-mounted method.

Abstract: A pixel drive circuit, a drive method thereof and a display device are provided. The pixel drive circuit includes a writing sub-circuit, an amplification sub-circuit, and a drive sub-circuit, writing sub-circuit is configured to transmit a data voltage provided by a signal input terminal to the amplification sub-circuit under control of the scan signal terminal; the amplification sub-circuit is configured to generate an amplification electrical signal according to the data voltage and output the amplification electrical signal to a drive sub-circuit, the drive sub-circuit is configured to obtain the data voltage based on the amplification electrical signal output by the amplification sub-circuit and provide a drive current to a light-emitting device under control of the data voltage, and the light-emitting device is configured to emit light according to the drive current output by the drive sub-circuit.

Abstract: The present disclosure provides a method for optimizing a liquid injection process of ionic rare earth ore, including the following steps of: 1) testing the hydraulic properties of an ore body; 2) determining the diffusion degree of the ore body; 3) determining the spatial distribution of the rare earth grade and the impurity grade of the ore body prior to leaching; 4) determining model parameters of competitive exchange of rare earth ions and impurity ions with ammonium ions; 5) obtaining distribution of rare earth ion concentration within the ore body after completion of leaching; 6) obtaining a profile plot of a rare earth leaching rate as a function of the concentration and dosage of an injected leaching agent; and 7) determining a minimum leaching agent dosage to achieve a target leaching rate according to the profile plot, and then determining the ammonium sulfate concentration according to the minimum leaching agent dosage.

Abstract: Systems and methods execution of a magnetic resonance imaging pulse sequence including a first spin-echo echo planar imaging pulse sequence to acquire first data of a volume, a second spin-echo echo planar imaging pulse sequence comprising a first one or more diffusion gradient pulses to acquire first diffusion data of the volume, a third spin-echo echo planar imaging pulse sequence comprising a second one or more diffusion gradient pulses to acquire second diffusion data of the volume, and a fourth spin-echo echo planar imaging pulse sequence comprising a third one or more diffusion gradient pulses to acquire third diffusion data of the volume, generation of perfusion metrics based on the first data, and generation of diffusion metrics based on the first data, the first diffusion data, the second diffusion data, and the third diffusion data.

Abstract: Disclosed are a video content push method and apparatus, the method comprising: when a primary disaster recovery system of a video recommendation service fails, activating a standby disaster recovery system; receiving a video access request sent by an application client, and invoking first historical video content stored in middleware and obtained from historical video recommendations of the video recommendation service according to a preset proportion; pushing the first historical video content to the application client for playback. The method removes the dependence of recovery on other services, so that a recovery solution is more robust, thereby increasing the stability of video content pushing.

Abstract: Systems and methods for activating and deactivating controlled devices are provided. Such systems and methods can include a microprocessor unit sampling signal data from a smart microwave sensor module to detect a presence of a user within a secured area, using the signal data to track a route of the user within the secured area, and activating or deactivating the controlled devices located within the secured area based on a location of an end of the route. Such systems and methods can include activating the controlled devices when the location of the end of the route is within the secured area and deactivating the controlled devices when the location of the end of the route is not outside of the secured area.

Abstract: Systems and methods execution of a magnetic resonance imaging pulse sequence including a first spin-echo echo planar imaging pulse sequence to acquire first data of a volume, a second spin-echo echo planar imaging pulse sequence comprising a first one or more diffusion gradient pulses to acquire first diffusion data of the volume, a third spin-echo echo planar imaging pulse sequence comprising a second one or more diffusion gradient pulses to acquire second diffusion data of the volume, and a fourth spin-echo echo planar imaging pulse sequence comprising a third one or more diffusion gradient pulses to acquire third diffusion data of the volume, generation of perfusion metrics based on the first data, and generation of diffusion metrics based on the first data, the first diffusion data, the second diffusion data, and the third diffusion data.

Abstract: Disclosed are a video content push method and apparatus, the method comprising: when a primary disaster recovery system of a video recommendation service fails, activating a standby disaster recovery system; receiving a video access request sent by an application client, and invoking first historical video content stored in middleware and obtained from historical video recommendations of the video recommendation service according to a preset proportion; pushing the first historical video content to the application client for playback. The method removes the dependence of recovery on other services, so that a recovery solution is more robust, thereby increasing the stability of video content pushing.

Abstract: The present invention discloses a method for preparing surface-active onion-like carbon nanospheres based on vapor deposition, comprising: directly preparing high-surface-activity onion-like carbon nanospheres formed by coating ferroferric oxide nano-particles on an onion-like graphitized shell by taking liquid small organic molecule alkane n-dodecane as a carbon source to perform chemical vapor deposition at high temperature of 650˜700° C. in an inert carrier gas environment with existence of a ferrocene catalyst. An onion-like carbon nanosphere product prepared according to the present invention has good surface activity and thermal stability, is wide in practicability, and can be widely applied to the fields of adsorbing materials, energy storage materials, catalytic materials, medical materials and the like.

Abstract: An ore volume-based zonal injection method for ionic rare earth includes six steps of ore body data acquisition; ore volume calculation by units; calculation of leaching agent consumption ? per unit ore volume; calculation of unit ore volume-based zoning range difference; merging of the units into injection zones; and injection.

Abstract: The present disclosure relates to a method for determining a source sink term of an ionic type rare earth ore leaching process. The method includes the following four steps: (1) determining an ion exchange selection coefficient of a rare earth ore sample; (2) determining the rare earth grade of the rare earth ore sample; (3) building a source sink term model of the ore leaching process; and (4) determining parameters in the source sink term model. The present disclosure can simulate the ionic type rare earth ore leaching process by combining a convection-dispersion equation, and determine the optimal concentration of the ore leaching agent. When an ammonium sulfate solution at an optimal concentration of 12.0 g/L is used to perform a column leaching test, the obtained rare earth leaching rate is up to 96.3 percent.

Abstract: Systems and methods for activating and deactivating controlled devices are provided. Such systems and methods can include a microprocessor unit sampling signal data from a smart microwave sensor module to detect a presence of a user within a secured area, using the signal data to track a route of the user within the secured area, and activating or deactivating the controlled devices located within the secured area based on a location of an end of the route. Such systems and methods can include activating the controlled devices when the location of the end of the route is within the secured area and deactivating the controlled devices when the location of the end of the route is not outside of the secured area.

Abstract: An account login method includes receiving a login request command sent by a second terminal, the login request command carrying an account and a second terminal identifier. The method further includes detecting whether a device lock flag corresponding to the account is unlocked and that a state corresponding to the second terminal identifier is that a device lock is locked. If yes, the method further includes acquiring a first terminal identifier corresponding to the account, a state corresponding to the first terminal identifier being that the device lock is unlocked and implementing a login of the account on the second terminal by using a first terminal corresponding to the first terminal identifier.

Abstract: A liquid nitrogen cyclic freeze-thaw permeability-improvement gas drainage method based on horizontal directional boreholes comprises: first constructing a main borehole at an intake roadway or a return roadway, a low-level roadway and a high-level roadway, after a drill bit reaches a pre-set target position of a coal bed, uniformly and directionally constructing a plurality of branch boreholes along a horizontal direction of the coal bed, injecting water to the coal bed, opening a valve, filling the main boreholes with liquid nitrogen, rapidly freezing the water injected into the branch boreholes and the periphery of the coal bed, and stopping injecting the nitrogen when an average temperature of a pre-permeability-improvement area monitored by a temperature measuring hole is lowered to ?2° C. or lower.

Abstract: A shear vibration-based piezoelectric composite material and a preparation method thereof are disclosed. The piezoelectric composite material includes a piezoelectric material and the passive material. The piezoelectric material includes a piezoelectric material polarized along the x-axis positive and a piezoelectric material negatively polarized along the x-axis. The piezoelectric materials in the two polarization directions are alternately arranged along the x-axis direction. The passive material includes a filling layer, a transition layer, and a planar layer. The filling layer is disposed between every two adjacent piezoelectric materials. The planar layer is located outer two surfaces perpendicular to the z-axis of the piezoelectric material. The planar layer on one side is fixedly connected to the filling layer in the odd-numbered position via the transition layer. The planar layer on the other side is fixedly connected to the filling layer in the even-numbered position via the transition layer.

Abstract: A sample adding system for automatically adding a sputum digestion liquid includes a weighing device provided with a weight sensor and a sample adding device. A liquid inlet of a sample adding tube goes deep into the sputum digestion liquid reagent bottle, and a liquid outlet of the sample adding tube extends to a position above the weighing device. A sample adding needle is connected to the liquid outlet of the sample adding tube. The sample adding tube is equipped with a quantitative sample adding pump. A signal output end of the weight sensor is electrically connected to a signal input end of a single-chip microcomputer, and a control output end of the single-chip microcomputer is electrically connected to a control input end of the quantitative sample adding pump.

Abstract: The present invention relates to a composite catalyst, preparation process thereof, and process for catalyzing the trimerization of butadiene using the composite catalyst. The composite catalyst comprises: (A) a titanium compound catalyst active component, (B) an organometallic compound co-catalyst component, (C) a sulfoxide compound catalyst-modifying component, (D) a monoester compound catalyst-modifying component, and (E) a solvent component. The composite catalyst has advantages of excellent selectivity, high catalytic activity, easy preparation and so on.

Abstract: Systems and methods for providing a plurality of alarm levels for a motion detector monitoring a region are provided. Some methods can include a microwave sensing device detecting a presence of an intruder in a monitored region, a microcontroller coupled to the microwave sensing device determining a position of the intruder in the monitored region based on signals from the microwave sensing device, and the microcontroller triggering one of a plurality of alarm levels based on the position of the intruder in the monitored region.

Abstract: Some systems for self-adjusting a monitoring pattern range of a microwave sensing device can include a microcontroller coupled to the microwave sensing device, an antenna of the microwave sensing device, signal processing circuitry of the microwave sensing device coupled to the antenna, and a digital potentiometer of the microwave sensing device coupled to the signal processing circuitry.

Abstract: Disclosed are method for operating a designated service, a service unlocking method and terminal.