Abstract: An unmanned aerial vehicle (UAV) includes a central body and a plurality of arms extending from the central body. Each of the plurality of arms supports one or more propulsion units. At least one arm of the plurality of arms is configured to transform between (1) a flight configuration that provides lift while the UAV is in flight and (2) a landing configuration in which the at least one arm is configured to function as a landing support that bears weight of the UAV while the UAV is not in flight. The at least one arm is configured to transform between the flight configuration and the landing configuration in response to operation of the one or more propulsion units supported by the at least one arm.

Abstract: There provide a pixel driving circuit and driving method thereof, an array substrate and display apparatus, wherein the pixel driving circuit comprises: a data line; a gate line; a first power supply line; a second power supply line; a light emitting device connected to the second power supply line; a driving transistor connected to the first power supply line; a storage capacitor having a first terminal connected to a gate of the driving transistor and configured to transfer information including the data voltage to the gate of the driving transistor; a resetting unit configured to reset a voltage across the storage capacitor as a predetermined signal voltage; a data writing unit configured to write information including the data voltage into the second terminal of the storage capacitor; a compensating unit configured to write information including a threshold voltage of the driving transistor and information of the first power supply voltage into the first terminal of the storage capacitor; and a light emit

Abstract: The invention provides an OLED pixel arrangement structure and display panel, and the OLED pixel arrangement structure comprises: a first sub-pixel group, a second sub-pixel group, and a third sub-pixel; the n-th row of the OLED pixel arrangement structure comprising alternating arrangement of the first sub-pixel group and the second sub-pixel group at intervals; the (n+1)th row comprising a plurality of third sub-pixels arranged at intervals, and the third sub-pixel being disposed at the intervals between the first sub-pixel group and the second sub-pixel group. The structure improves the resolution of the OLED pixel arrangement structure and reduces the manufacturing difficulty.

Abstract: The present disclosure discloses a display panel including a flat layer, a mixed layer and a base film layer sequentially disposed; wherein the mixed layer includes an organic film layer and a multi-film structure, the organic film layer and the multi-film structure are alternately distributed on the base film layer in a direction parallel to the base film layer. In the present disclosure, the ability to omni-directionally bend a display panel is improved by replacing the inorganic film layer in a specific area below the flat layer of the display panel with an organic film layer to improve the omnibearing bending ability of the display panel and enhance the user experience.

Abstract: A linear hierarchical structure lithium titanate material, preparation and application thereof. The crystal phase of the lithium titanate material is a spinel-type crystal phase or a monoclinic crystal phase or a composite crystal phase thereof; the lithium titanate material is mainly composed of a linear hierarchical structure; the linear hierarchical structure has an aspect ratio larger than 10; and the surface components of the linear hierarchical structure are nanosheets. The long-axis of the linear structure facilitates the effective migration of electrons, and the sheet-like hierarchical structure facilitates the rapid intercalation and deintercalation process of lithium ions, sodium ions or potassium ions, and a large specific surface area facilitates the contact area between the electrolyte solution and the electrodes and reduces the current density, thus is excellent in a rapid charge-discharge performance of the battery.

Abstract: The present invention provides a linear porous titanium dioxide material and the preparation and products thereof. The linear porous titanium dioxide material has an anatase phase structure and a single crystal structure, and the structure of the linear porous titanium dioxide material is composed of a plurality of particles having an oriented growth direction. The invention also provides a method of preparing the above material and the use thereof. The long axis of structure of the titanium dioxide porous nanowire of the present invention facilitates effective electron migration.

Abstract: A process for preparing a titanic acid salt, titanic acid, and titanium oxide having a controllable particle size and a hierarchical structure, wherein the process includes the steps of: preparing a titanium-containing peroxo-complex solution; adding a basic metal compound to the titanium-containing peroxo-complex solution to form a mixture solution; adding one of polyvinyl alcohol, hydroxypropyl methyl cellulose, and polyethylene glycol to the mixture solution to form a precursor dispersion; and subjecting the precursor dispersion to a solvothermal reaction to obtain the titanic acid salt having a hierarchical structure. The process for preparing a titanic acid salt, titanic acid, and titanium oxide having a controllable particle size and a hierarchical structure, can not only realize the regulation of morphology and particle diameter of constituent units in the hierarchical structure, but also can achieve the regulation of particle size in the hierarchical structure.

Abstract: The present invention provides a nanostructured titanic acid salt and a preparation process and use thereof. The process comprises preparing a dispersion containing titanium peroxy complex; slowly adding a metal compound to the dispersion containing the titanium peroxy complex to form a solution; adding an alcohol to the solution under normal temperature and normal pressure to produce the nanostructured titanic acid salt precursor precipitate in the solution, and separating the precipitate to obtain the titanic acid salt precursor; drying the precursor, and then heat treating it to obtain the nanostructured titanic acid salt product. The present invention provides a process for preparing a titanic acid salt with simple preparation process, easy control for process parameters and easy large-scale industrial production.

Abstract: A preparation method of a nanotube hierarchically structured lithium titanate includes the steps of: S1. dispersing a titanium source into an aqueous solution containing lithium hydroxide and hydrogen peroxide and stirring to obtain a mixed solution; S2. subjecting the mixed solution obtained in step S1 to a reaction by heating to obtain a precursor having a nanowire-like structure; S3. subjecting the precursor having a nanowire-like structure obtained in step S2 to separation and drying; S4. subjecting the precursor having a nanowire-like structure after separation and drying to a low-temperature annealing treatment; S5. subjecting the precursor having a nanowire-like structure after the low-temperature annealing treatment to a liquid thermal reaction to obtain the nanotube hierarchically structured lithium titanate. The method includes a simple process and easily controllable process parameters, and may be easily scaled-up for industrial production.

Abstract: This disclosure provides an OLED light-emitting device, a production method thereof as well as a display apparatus, and relates to the technical field of OLED display, which can enhance the internal quantum efficiency of a blue OLED light-emitting device. This OLED light-emitting device comprises a substrate, and an anode, a hole transport layer, a blue light-emitting layer and a cathode provided on the substrate; the OLED light-emitting device further comprises an Ag nanolayer located between the anode and the hole transport layer; wherein the blue light-emitting layer is a blue phosphorescent light-emitting layer; the absorption spectrum of the Ag nanolayer overlaps the emission spectrum of the blue phosphorescent light-emitting layer, and the blue phosphorescent light-emitting layer is located within the penetration depth of surface plasma of Ag nanoparticles in the Ag nanolayer. It is used in the production of a blue OLED light-emitting device and a display apparatus comprising the same.

Abstract: Aerial vehicles are provided with one or more transformable arms (110, 310, 410, 510, 910). The one or more transformable arms (110, 310, 410, 510, 910) may support one or more propulsion units, and transform between a flight configuration where the propulsion units of the arms effect flight of the aerial vehicle, and a landing configuration, wherein the transformable arms (110, 310, 410, 510, 910) are used as a landing support that bears weight of the aerial vehicle when the aerial vehicle is not in flight. Using the transformable arms (110, 310, 410, 510, 910) as legs when the UAV is in a landed state permits the UAV to reduce weight and reduce obstruction to a payload carried by the UAV when the UA is in flight.

Abstract: An unmanned aerial vehicle (UAV) includes a fuselage, an electrical component, and an adapter arranged at the fuselage. The fuselage includes a battery compartment for accommodating a battery. The battery compartment includes an electrical connector for electrically coupling to the battery. The adapter is electrically coupled to the electrical connector and includes an access unit electrically coupled to the electrical connector and an adapting unit detachably coupled to the access unit. The adapting unit is configured to be electrically connected to the access unit when the adapting unit is coupled to the access unit. The adapting unit is electrically coupled to the electrical component through an adapting conductive wire to conduct power from the battery to the electrical component.

Abstract: A method for configuring transmission signals is disclosed. The method includes receiving a signal from a downhole tool in a wellbore. The signal may include a telemetry portion and a noise portion. The method also includes reproducing the telemetry portion based at least partially on the signal. Further, the method includes subtracting the telemetry portion from the signal. The method includes estimating, based at least partially on the subtraction, the noise portion of the signal. The method also includes altering a transmission configuration of the downhole tool based at least partially on the noise portion of the signal.

Abstract: A method for placement of electrodes includes determining spatial distribution of a signal caused by generating an electromagnetic field in an instrument disposed in drill string used to drill a wellbore. The electromagnetic field comprises encoded measurements from at least one sensor associated with the instrument. Voltages induced by noise are measured across at least one pair of spaced apart electrodes placed at a plurality of positions spaced apart from a surface location of the wellbore. A spatial distribution of noise is estimated using the measured voltages. Positions for placement of at least two electrodes are selected using the spatial distribution of signal and the spatial distribution of noise.

Abstract: A sound absorption panel (201) is constructed on an acoustically thin sheet (203) to provide an acoustic/vibrational energy absorption metamaterial structure. A plurality of dampers (101) are fixed to the acoustically thin sheet (203), and at least a subset of said dampers (101) comprise a support (103) and a flexible membrane (105) supported by the support. The flexible membrane (105) has one or more masses or platelets (107) attached. The dampers (101) in combination with the sheet (203) result in absorption of energy of movement of the sheet (203) resulting from sound transmission or vibrations across the sheet.

Abstract: A display component is provided. The display component has a flexible display panel, a first glass substrate, and a second glass substrate. The flexible display panel includes a first display portion, a second display portion, and a bending portion. The bending portion connects the first display portion and the second display portion. The first glass substrate covers a first light emitting surface of the first display portion, and the second glass substrate covers a second light emitting surface of the second display portion.

Abstract: A flexible display screen structure includes an outward curving zone arranged between a first display zone and a second display zone and the three zones commonly possess and share a common flexible substrate. Each of the first display zone and the second display zone are provided with commonly arranged array pixel circuits, while the outward curving zone is only provided with a metallic connection line for connection between the array pixel circuit of the first display zone and the array pixel circuit of the second display zone and a flexible organic layer covering the flexible organic layer of the metallic connection lines so as to reduce metal wires or lines arranged in the outward curving zone to allow the first display zone and the second display zone to be outwardly curvable through the outward curving zone.

Abstract: A method for configuring transmission signals is disclosed. The method includes receiving a signal from a downhole tool in a wellbore. The signal may include a telemetry portion and a noise portion. The method also includes reproducing the telemetry portion based at least partially on the signal. Further, the method includes subtracting the telemetry portion from the signal. The method includes estimating, based at least partially on the subtraction, the noise portion of the signal. The method also includes altering a transmission configuration of the downhole tool based at least partially on the noise portion of the signal.

Abstract: The present application discloses a flexible display panel and a method for fabricating thereof, and a flexible display apparatus. The flexible display panel including at least two non-bending regions and a bending region disposed between the at least two non-bending regions, at least one of the at least two non-bending regions is used as a display region; both the non-bending region and the bending region include the flexible substrate and the organic light emitting device layer, wherein the display region is further provided with at least one metal layer for providing a driving signal to the organic light emitting device layer, and the bending region is further provided with a buffer layer. When meeting the demand of display image in the bending region, the probability of damaging to the metal traces influenced by the bending in the bending region is reduced to increase the life time of the display panel.

Abstract: An unmanned aerial vehicle (UAV) includes a fuselage, an electrical component, and an adapter arranged at the fuselage. The fuselage includes a battery compartment for accommodating a battery. The battery compartment includes an electrical connector for electrically coupling to the battery. The adapter is electrically coupled to the electrical connector and includes an access unit electrically coupled to the electrical connector and an adapting unit detachably coupled to the access unit. The adapting unit is configured to be electrically connected to the access unit when the adapting unit is coupled to the access unit. The adapting unit is electrically coupled to the electrical component through an adapting conductive wire to conduct power from the battery to the electrical component.