Abstract: Provided is a LiDAR comprising a first transmitting unit and a second transmitting unit, which are configured to respectively emit first and second detection laser beams to detect a target object. The LiDAR comprises optical assemblies at both the transmitting end and the receiving end. The optical assemblies comprise transmitting and receiving lenses. The LiDAR comprises a first receiving unit and a second receiving unit configured to respectively receive a first echo and a second echo reflected by an object. The receiving units convert echoes into electrical signals. The first detection laser beam and the second detection laser beam are respectively pass through different optical distances before reaching the transmitting lens, and the first echo and the second echo respectively travel through different optical distances from the receiving lens before reaching the first receiving unit and the second receiving unit.

Abstract: Methods and systems for detecting and limiting the water in a photoionization detector are provided. The method may include powering off a lamp configured to ionize particles of air. The method may also include monitoring a signal from the photoionization detector. The signal may be monitored based on a current between a signal electrode and a bias electrode. In an instance the signal is above a signal threshold, the method may also include electrolyzing one or more particles of water present in the photoionization detector by closing a leakage switch in order to allow current to flow through the bias electrode and the signal electrode. In an instance the signal is below the signal threshold, the method may include powering on the lamp to begin photoionization detection. Corresponding systems are also provided.

Abstract: Hydrogen may be produced from natural gas (e.g., methane). For example, a method for producing hydrogen from natural gas may include: introducing natural gas to a reactor, wherein the reactor contains therein a catalyst, wherein the catalyst includes a high entropy alloy, and wherein the high entropy alloy has an entropy, S, such that S?11.31 J K?1 mol?1; reacting the natural gas with the catalyst to form hydrogen gas and solid carbon; and separating the hydrogen gas from the solid carbon to produce a hydrogen stream comprising the hydrogen gas from the reactor.

Abstract: Provided in embodiments of this application are a transmission assembly and a foldable electronic device. The transmission assembly includes a first transmission assembly. The first transmission assembly is configured for use in a bending area of the foldable electronic device. The first transmission assembly includes at least two first conductive layers and a first transmission layer located between the two first conductive layers. Each first conductive layer includes at least a first conductive fabric, and the first transmission layer includes at least one first signal line. A dielectric layer is further arranged between the first conductive layer and the first transmission layer, and the dielectric layer includes at least a first substrate layer.

Abstract: An explosive cartridge delivery tube is provided and includes an explosive delivery tube body, wherein the explosive delivery tube body has a length greater than a depth of a blast hole, an explosive delivery chamber is formed inside the explosive delivery tube body, the explosive delivery chamber is arranged in a length direction of the explosive delivery tube body in a running-through manner, and an internal diameter of the explosive delivery chamber is greater than a diameter of an explosive cartridge.

Abstract: The present invention discloses a blue luminescent host composition and an organic electroluminescent device comprising the blue luminescent host composition. The blue luminescent host composition comprises at least a first host compound, a second host compound, and a third host compound, wherein the structure of the first host compound is as represented by Formula I, the structure of the second host compound is as represented by Formula II, and the structure of the third host compound is as represented by Formula I or II; and the first host compound, the second host compound, and the third host compound are different from each other. The blue luminescent host composition provided by the present invention is applied, as a host material in a luminescent layer, to a blue organic electroluminescent device. Not only can the driving voltage of a device be significantly reduced, but also the lifetime of the device can be significantly prolonged.

Abstract: This application discloses an electronic device, including a first metal plate, a second metal plate, and a first circuit board. The first metal plate is configured to support a display screen of the electronic device. The second metal plate and the first metal plate are oppositely arranged in a first direction, and the second metal plate is configured to support a rear cover of the electronic device. At least a portion of the first circuit board is located between the first metal plate and the second metal plate. The first metal plate includes a first opening, and the second metal plate includes a second opening. A projection of the first opening on the second metal plate at least partially overlaps the second opening. The electronic device according to this application can weaken coupling between a parallel plate waveguide and a microstrip line waveguide.

Abstract: The invention provides ionizable cationic lipids and lipid nanoparticles for the delivery of nucleic acids to target cells, such as immune cells and hematopoietic stem cells, and methods of making and using, such lipids and targeted lipid nanoparticles.

Abstract: The present invention provides an organic electroluminescent compound, a composition containing the organic compound, and an organic electroluminescent device. The organic electroluminescent compound has a general structural formula as shown in Formula I. The compound can not only enhance the electron-pushing ability and adjust the electron mobility of molecules, but also make the film formation of the material more stable and prolong the lifetime of the organic electroluminescent device. In addition, the present invention further provides a composition containing the organic electroluminescent compound. The composition can not only regulate the balance of carrier transport by means of interaction, but also reduce the energy loss.

Abstract: The present invention discloses a blue luminescent host composition, an organic electroluminescent device comprising the blue luminescent host composition, and a display device. The blue luminescent host composition comprises at least a first host compound, a second host compound, and a third host compound, wherein the structure of the first host compound is as represented by formula I, the structure of the second host compound is as represented by formula II, and the structure of the third host compound is as represented by formula I or II. The blue luminescent host composition provided by the present invention has a melting point lower than that of each individual compound. The blue luminescent host compounds provided by the present invention are evaporated to form a host composition thin film under continuous working conditions and at different evaporation rates.

Abstract: The present invention discloses a deuterated composition, a preparation method therefor, and an organic electroluminescent device comprising the deuterated composition. The deuterated composition comprises at least two compounds represented by Formula I or at least two compounds represented by Formula II. By means of the deuterated composition composed of the compounds having specific deuteration positions and degrees of deuteration, the prepared organic electroluminescent device can improve a crystallization problem caused by a decrease in the uniformity of a thin film of a luminescent layer caused by frequent temperature changes while the voltage of the device is maintained basically unchanged, and thus improves the service lifetime of the organic electroluminescent device in a complex temperature environment. Furthermore, the present invention further provides a method for preparing the deuterated composition.

Abstract: A mold for producing an aerosol-generating article includes a first main body, a second main body and a third main body arranged in sequence in a first direction, wherein an extrusion channel extending in the first direction is formed in the third main body; a first stand column and a feeding channel is provided on the second main body, the feeding channel extends in the first direction and is in communication with the extrusion channel, and the first stand column extends to the extrusion channel in the first direction; and a second stand column and a first cavity is provided on the first main body, the first cavity extends through two opposite ends of the first main body in the first direction and is in communication with the feeding channel, and the second stand column extends to the extrusion channel in the first direction.

Abstract: A control method of a lidar is provided. The lidar includes a laser emitter array with N laser emitters. The control method includes: controlling n laser emitters to emit a first detection laser beam, and controlling k laser emitters among the n laser emitters to emit a second detection laser beam; receiving echoes, reflected by a target object, of the first detection laser beam and the second detection laser beam; calculating a distance of the target object according to the echoes; and reducing, in a case that the target object is detected in a preset distance, an emission intensity of the first detection laser beam emitted by at least parts of the n laser emitters in a range corresponding to the target object in a next detection period.

Abstract: An example photoionization detector is provided. The example photoionization detector includes an insulation spacer component and a signal collection electrode component disposed on the first surface of the insulation spacer component. In some examples, the signal collection electrode component includes a first electrode layer and a second electrode layer.

Abstract: A composition that includes porous polyurethane particles is provided. The porous particles are formed by curing an isocyanate component with water in the presence of a polyester filler and a hydrocarbon phase. A method for the preparation of porous polyurethane particles is also provided. The method includes providing a dispersed medium that contains a hydrocarbon phase, water, and a polyester filler. Then, an isocyanate component that is immiscible with the hydrocarbon phase may be added to the dispersed medium to form polyurethane prepolymer droplets, that may be cured by the water in the medium. An additional method for porous polymer particle preparation that includes providing a dispersed medium comprising a hydrocarbon phase, an isocyanate component that is immiscible in the hydrocarbon phase, and a polyester filler is provided. The dispersed medium may be agitated to form polyurethane prepolymer droplets, that may be cured by adding water.

Abstract: A heat-not-burn device control method for a heat-not-burn device that includes a heating component configured to heat an aerosol generating substrate includes: detecting, in real time after startup, whether an inhalation action occurs; controlling, when detecting that the inhalation action occurs, the heating component to start heating and remain at a preset target temperature so as to enable the heating component to heat a corresponding region of the aerosol generating substrate, the heating component being located at a periphery of the aerosol generating substrate and deviating from a central axis of the aerosol generating substrate; and controlling, when detecting that the inhalation action stops, the heating component and/or the aerosol generating substrate to rotate along the central axis of the aerosol generating substrate so as to enable the heating component and the aerosol generating substrate to generate a corresponding displacement in a circumferential direction of the aerosol generating substrate.

Abstract: A manipulator for an industrial robot. It includes at least one dual joints assembly including a housing including a first part defining a first chamber extending in a first axial direction and a second part defining a second chamber extending in a second axial direction orthogonal to the first axial direction. The first part is offset from the second part by a distance in a third axial direction orthogonal to the first axial direction and the second axial direction. A first joint is arranged within the first chamber and includes a first power output shaft configured to rotate around the first axial direction. A second joint is arranged within the second chamber and includes a second power output shaft configured to rotate around the second axial direction.

Abstract: An aerosol-generating device includes an accommodating seat and a drive assembly. The accommodating seat defines an accommodating cavity for accommodating an aerosol-forming article. The accommodating cavity has a central axis for the aerosol-forming article to be arranged in the accommodating cavity rotatably around the central axis. The drive assembly includes a drive motor and a transmission unit. The transmission unit is connected to the drive motor and the aerosol-forming article, to transmit power generated by the drive motor to the aerosol-forming article, for the aerosol-forming article to rotate around the central axis.

Abstract: Described is a method for managing an expectation on sanding volume in weak sandstone. In situ data related to a region of sandstone proximate a well is acquired. Measured property data corresponding to samples from the region of sandstone are obtained, and a chemical consolidation treatment is performed on the samples. Chemical consolidation treatment data is then obtained. The measured property data and the chemical consolidation treatment data is supplied as inputs to a simulator. The simulator performs simulations with and without chemical consolidation treatment. Based on the simulations, a correlation between a well flow rate and an effect of the chemical consolidation treatment is determined.

Abstract: An emitter includes a substrate and multiple lasers. The multiple lasers are arranged on the substrate in an array and configured to emit detection beams. At least a laser of the plurality of lasers is configured to emit a detection beam through a flat light emitting region. A size of the flat light emitting region in a first direction is greater than a size in a second direction.