Abstract: An automatic shower head contains: a body and a shower scrubber. The body includes a casing, a receiving cap fitted with the casing, a handle, a first connection element, a first water guide ring, and multiple spray bars and a second water guide ring. At least one first seal ring is retained on a water conduit of the first connection element and the second water guide ring. The casing has a coupling loop. The shower scrubber includes a panel, a lid, an accommodation sleeve, a second seal ring, and a rotation element, and a fixing plug. The lid has a copper pin, a waterproof sheet, a first circuit board, a gear seat, a gear assembly, a gear shaft, a drive gear, a holder, a motor, a battery, a contact sheet, and a second circuit board.

Abstract: A dye composition I may include: a) oxidative dye(s); b) anionic polymer thickener(s); and c) antioxidant(s) including thiol-derived reducer(s). A kit may include (1) the dye composition I and (2) oxidizing composition II, including at least one oxidant. The oxidation base may include a para-phenylenediamine, bis(phenyl)alkylenediamine, para-aminophenol, ortho-aminophenol, heterocyclic base, or mixture thereof, optionally in addition salt form.

Abstract: An optical module with a reduced size but improved imaging includes a light source, a first lens, at least two first reflectors, at least two second reflectors, and a diffracting optical element. The first reflectors and the second reflectors are both inside the first lens and alternately arranged along an optical path of emitted light, which changes and lengthens its transmission path for face recognition focusing or similar purposes. An electronic device using the optical module is also provided.

Abstract: A UAV delivery control system is disclosed. Sensors detect operation parameters associated with the UAV as the UAV maneuvers along an airborne delivery route. A UAV operation controller monitors UAV route parameters as the UAV maneuvers along the airborne delivery route. The UAV route parameters are indicative as to a current environment of the airborne delivery route that the UAV is encountering. The UAV operation controller automatically adjusts the operation of the UAV to maintain the operation of the UAV within an operation threshold based on the operation parameters and the UAV route parameters. The operation threshold is the operation of the UAV that is maintained within an overall airborne operation radius of the UAV from a return destination thereby enabling the UAV to execute the delivery of the package along the airborne delivery route and to return to the return destination.

Abstract: A flow cell package includes first and second surface-modified patterned wafers and a spacer layer. The first surface-modified patterned wafer includes first depressions separated by first interstitial regions, a first functionalized molecule bound to a first silane or silane derivative in at least some of the first depressions, and a first primer grafted to the first functionalized molecule in the at least some of the first depressions. The second surface-modified patterned wafer includes second depressions separated by second interstitial regions, a second functionalized molecule bound to a second silane or silane derivative in at least some of the second depressions, and a second primer grafted to the second functionalized molecule in the at least some of the second depressions. The spacer layer bonds at least some first interstitial regions to at least some second interstitial regions, and at least partially defines respective fluidic chambers of the flow cell package.

Abstract: A method for cleaning an electrospray emitter of a mass spectrometer comprises the steps of: (a) changing a mode of operation of the electrospray emitter from a stable jet mode of operation to a dripping mode or a pulsating mode of operation by lowering a magnitude, |V|, of a voltage applied between a counter electrode and the electrospray emitter; and (b) changing the mode of operation of the electrospray emitter from the dripping mode or the pulsating mode of operation to the stable jet mode of operation by increasing the magnitude, |V|, of the applied voltage; wherein the repetitions are performed at a predetermined frequency that depends on one or more of liquid flow rate, an emitter internal diameter, and liquid properties.

Abstract: A preparation method of a copper-based graphene composite with high thermal conductivity is provided. A new electrodeposited solution is used for direct current (DC) electrodeposition at a reasonable electrodeposition frequency, which fabricates a new copper-based graphene composite with high tensile strength and thermal conductivity. The copper-based graphene composite prepared by electrodeposition has high thermal conductivity of 390-1112 W/(m·k) and tensile strength of 300-450 MPa, which meets the requirements in the field of thermal conduction.

Abstract: A method for enhancing water chemistry at a surface for improved well performance may include testing water at the surface to identify a pH level of the water, a type of solid-generating component in the water, and an amount of a solid-generating component in the water. The method may also include identifying a type and an amount of an additive based on identifying the type and the amount of the solid-generating component, where the additive is configured to generate a solid when mixed with the water. The method may further include mixing the water and an additive at the surface to generate the solid and enhanced water, where the solid comprises at least some of the solid-generating components of the water. The enhanced water may be usable for a field operation to cause the improved well performance, and the solid may be removable from the enhanced water at the surface.

Abstract: An unmanned aerial vehicle according to certain embodiments generally includes a chassis, a power supply mounted to the chassis, a control system operable to receive power from the power supply, at least one rotor operable to generate lift under control of the control system, a line having one end coupled to the chassis and an opposite free end, wherein the free end is positioned below the chassis, and a severing mechanism operable to sever the line under control of the control system.

Abstract: A low-voltage startup circuit for a low-inductance wireless charging systemincludes a voltage input port Vrect, a common grounding port VSS, a PMOS driver signal control module pgate_ctrl_logic, a NMOS MN1 and a PMOS MP1, a Vmax power supply selection control module vmax_sel, a power-on reset module por, a low-voltage band-gap reference circuit lv_bgr, a rectifier logic control module boost_logic, a rectifier SR and a rectifier output under_voltage protection control module vrect_uvlo. The low-voltage startup circuit can normally start the MCU at the Vrect voltage under a low-voltage condition (1.4 V).

Abstract: A method for processing a plurality of queries is provided according to embodiments of the present disclosure. In this method, based on a plurality of queries and an execution plan for the plurality of quires, a plurality of record identification (ID) numbers can be stored into a pool in a numerical order. Each of the plurality of record ID numbers can identify a data record in a database. Then, the execution plan can be performed to batch a plurality of data records corresponding to the plurality of record ID numbers in the database based on a distribution of the plurality of record ID numbers in the pool.

Abstract: The present disclosure discloses an assembling device for a rotating joint of rotary drying equipment, including a telescopic upright column; a mounting sleeve is fixed at a top of the telescopic upright column; an inner end of each bevel gear is connected with a first screw rod; the first screw rods are sleeved with fixed rods through threads; a microprocessor is fixed at a bottom of the mounting sleeve; a motor is fixed at a top of the mounting sleeve; an oil slot formed in an inner wall of a top of a detection tooth ring is internally connected with a detection seat through a first elastic telescopic rod; an adjustment rod is embedded into a right bottom of the detection seat in an elastic sliding manner through a spring.

Abstract: A multi-directional radiation leaky coaxial cable is disclosed, including an inner conductor, an insulating layer, an outer conductor and a sheath which are sequentially and coaxially nested from inside to outside. The outer conductor is provided with at least two rows of slotted hole groups, the at least two rows of slotted hole groups are distributed at different angles in a circumferential direction of the outer conductor, each row of slotted hole group includes a plurality of slotted hole arrays which are periodically arranged along an axial direction of the outer conductor, each slotted hole array includes a plurality of slotted holes, pitches of the slotted hole groups are the same, and a periodic arrangement difference of two adjacent rows of slotted hole groups in the circumferential direction is half a pitch, so that a phase difference of respective excitation electric fields is 180°.

Abstract: The present disclosure discloses an assembling device for a rotating joint of rotary drying equipment, including a telescopic upright column; a mounting sleeve is fixed at a top of the telescopic upright column; an inner end of each bevel gear is connected with a first screw rod; the first screw rods are sleeved with fixed rods through threads; a microprocessor is fixed at a bottom of the mounting sleeve; a motor is fixed at a top of the mounting sleeve; an oil slot formed in an inner wall of a top of a detection tooth ring is internally connected with a detection seat through a first elastic telescopic rod; an adjustment rod is embedded into a right bottom of the detection seat in an elastic sliding manner through a spring.

Abstract: Certain embodiments of the present application relate to an unmanned aerial vehicle, comprising a chassis, a control system mounted to the chassis, at least one rotor operable to generate lift under control of the control system, a spool having a wound portion of a line wound thereon, the line including a free portion, an attachment device secured to the free portion of the line and configured to facilitate attachment of a parcel to the line, a motor operable to rotate the spool under control of the control system such that the control system is operable to raise the attachment device to a raised position and lower the attachment device from the raised position, and a spring positioned between the chassis and the attachment device such that the spring is engaged between the chassis and the attachment device when the attachment device is in the raised position.

Abstract: Certain embodiments of the present application relate to a method for releasing a parcel from an unmanned aerial vehicle (UAV). The parcel is engaged with a hook attached to a line suspended from the UAV. The method includes lowering the hook such that the parcel is at least partially supported by a target surface, thereby performing an attempt to release the parcel from the hook, performing at least one iteration of an iterative procedure. The iterative procedure includes raising the hook, and determining whether the line remains loaded. The iterative procedure further includes lowering the hook an additional time in response to a determination that the line remains loaded, thereby performing an additional attempt to release the parcel from the hook. The iterative procedure further includes performing an additional iteration of the iterative procedure in response to the number of attempts failing to satisfy a threshold number of attempts.

Abstract: Certain embodiments of the present application relate to an unmanned aerial vehicle including a control system, at least one rotor operable to generate lift under control of the control system, a spool mounted for rotation in a winding direction and an unwinding direction opposite the winding direction, a motor operable to rotate the spool in at least the winding direction under control of the control system, and a brake mechanism including a brake actuator operable to transition the brake mechanism between a locked state and an unlocked state under control of the control system. The brake mechanism in the locked state prevents rotation of the spool in at least the unwinding direction. The brake mechanism in the unlocked state does not prevent rotation of the spool in the unwinding direction.

Abstract: An example carriage is configured for mounting to an unmanned aerial vehicle. The carriage generally includes a housing assembly configured for mounting to the unmanned aerial vehicle, a movable grip mounted to the housing assembly for movement between a capturing position and a releasing position, a latch device, and a driver. The latch device has a latching state and an unlatching state, is configured to retain the movable grip in the capturing position when the latch device is in the latching state, and is configured to permit movement of the movable grip from the capturing position to the releasing position when in the unlatching state. The driver is operable to transition the latch device from the latching state to the unlatching state.

Abstract: An unmanned aerial vehicle according to certain embodiments generally includes a chassis, a power supply mounted to the chassis, a control system operable to receive power from the power supply, a plurality of arms extending outward from the chassis, a plurality of rotors, and a support structure mounted atop the chassis. Each rotor is mounted to a corresponding arm of the plurality of arms, is in communication with the control system, and is operable to generate lift under control of the control system. The support structure includes a plurality of arched struts that connect to one another at an apex region of the support structure.