Abstract: This disclosure describes systems, methods, and devices related to using enhanced high efficiency (HE) frames. A device may determine a high efficiency signal-B (HE-SIG-B) field for a high efficiency (HE) frame, the HE-SIG-B field comprising a common information field and a user information field. The device may determine a data portion of the HE frame, wherein the data portion includes one or more resource units (RUs) with a size equal to a number of tones. The device may determine a first resource allocation subfield and a second resource allocation subfield of the common information field based at least in part on the number of tones. The device may cause to send the HE frame.

Abstract: Example communication methods and apparatus are described. One example method includes receiving a first message by a terminal device from an access network device, where the first message indicates the terminal device to be handed over to a target cell or to be redirected to a target frequency. If the handover to the target cell fails or the redirection to the target frequency fails, the terminal device searches for an acceptable cell or a suitable cell. According to some embodiments of this application, an emergency call delay can be reduced.

Abstract: Provided is a device for spraying an ammoniacal gas in an automatically-adjustable manner based on a flow rate

Abstract: A resonator includes a body shaft portion, a resonant disk portion and a coupling face portion. The body shaft portion has a top end and a bottom end. An inner cavity is slotted between the top end and the bottom end. The resonant disk portion is integrally formed on the top end. The coupling face portion is integrally formed on the bottom end. The body shaft portion includes a first outer surface and the coupling face portion includes a second outer surface. A first connecting arc surface is formed between the first outer surface and the second outer surface. The inner cavity has a central axis. In a transverse section perpendicular to the central axis, a wall thickness T of the body shaft portion is 0.5 mm˜1 mm and a first arc length R1 of the first connecting arc surface is no more than 0.25 mm.

Abstract: An image display method includes: obtaining both an original image and a color rendering parameter corresponding to an image to be displayed, a bit number of color depth of the original image being smaller than a bit number of color depth of the image to be displayed; generating the image to be displayed according to the original image and the color rendering parameter; and displaying the image to be displayed.

Abstract: An additively manufactured high-strength and high-ductility stainless steel is characterized in that the composition, by weight percentage, C?0.05 wt %, Si?1 wt %, Mn?1 wt %, Cr 14.5-15.5 wt %, Ni 5.0-5.5 wt %, Cu 4-4.5 wt %, Nb 0.35-0.45 wt %, and the balance of Fe and unavoidable impurities. And Cr equivalent of Creq=% Cr+% Mo+2.2% Ti+0.7% Nb+2.48% Al. Ni equivalent of Nieq=% Ni+35% C+20% N+0.25% Cu. The yield strength of the high-strength and high-ductility stainless steel ?1270 MPa, the tensile strength ?1380 MPa, and the elongation after fracture ?15%.

Abstract: For the problem of difficult roof anchor withdrawal at the end of a working face, a static crushing directional anchor withdrawal method at the end of a large-mining-height working face is provided. The method includes the following steps: designing key parameters of boreholes for static crushing, including a borehole position, a spacing between boreholes, a borehole depth, and a borehole diameter at the end of a working face; then determining parameters of a static crushing agent grouting technology device for the construction of a static crushing process; and carrying out an anchor withdrawal operation at the end.

Abstract: A drilling device with a controllable femtosecond laser processing taper includes a femtosecond laser and a precision motion table. A support mechanism is provided along the central axis of the precision motion table, and a clamp is provided on the top of the support mechanism. The output end of the femtosecond laser is provided with a beam expander. The output end of the beam expander is provided with a reflection mirror. The output end of the reflection mirror is provided with a beam scanning module. The output end of the beam scanning module is provided with a semi-focusing mirror. The output end of the semi-focusing mirror is provided with a semi-transmissive reflection mirror arranged at 45 degrees. The reflection output end of the semi-transmissive reflection mirror is provided with a high-precision three-dimensional on-line monitoring module, and the transmission output end of the semi-transmissive reflection mirror faces the clamp.

Abstract: The present disclosure discloses a process for evaluating a corrosion inhibitor based on a high-throughput corrosion chip. In the present disclosure, a high-throughput corrosion chip is first prepared by using a chip spotter, and only a corrosion inhibitor and a corrosive substance need to be spotted on a metal sample to quickly, efficiently, and accurately evaluate performance of a corrosion inhibitor formulation, to meet corrosion test conditions such as different substances, different concentrations, and different corrosion duration; and then a corrosion degree of each measurement point in the high-throughput corrosion chip is identified and quantified by using a laser scanning confocal microscope. The high-throughput corrosion chip prepared by using the foregoing method can bear 10-1000 measurement points, and these measurement points can reflect corrosion effects of different inhibitor formulations in different corrosion duration.

Abstract: A steel-concrete composite bridge deck slab with steel tube-perfobond rib shear connectors and a method for constructing the same. The steel-concrete composite bridge deck slab structurally includes a steel bottom plate, a concrete layer, transverse perforated steel plate units provided on the steel bottom plate, steel grids arranged on upper surfaces of the transverse perforated steel plate units and longitudinal steel tubes arranged in an inserted manner on the transverse perforated steel plate units.

Abstract: This application provides a transistor, including a channel, a source, a drain, a gate, an isolation area disposed on two sides of the channel, and a source field plate located on a side of the gate away from the channel. The source field plate is electrically connected to the source. The source field plate includes a primary field plate and a secondary field plate. The primary field plate partially overlaps the gate. A side part of the primary field plate crosses the gate and extends to the drain along the channel. A first end of the primary field plate crosses the channel along a direction perpendicular to the channel and enters the isolation area. The secondary field plate is located at a boundary between the channel and the isolation area, and extends from the primary field plate to a direction of the source along the channel.

Abstract: A repair method for self-detecting and self-healing of corrosion defects in metals can achieve self-detecting and self-healing repair of an initial corrosion defect and be used to repair a micron-level corrosion defect. Furthermore, the self-detecting and self-healing repair method can be used to effectively repair an initial corrosion defect in a large-sized high-precision structural component, thus effectively improving the service safety of the high-precision metal structural component and prolonging the service life of the same.

Abstract: A steel wire self-locking mechanism and a lifting device are provided. The steel wire self-locking mechanism includes a surrounding plate and a self-locking gear and a locking device arranged in the surrounding plate, and uses a friction force of a threaded sleeve to lock the lifting device. The lifting device includes a lifting assembly and a beam assembly. The steel wire self-locking mechanism is arranged in the beam assembly, and the locking of the lifting device is realized by the steel wire self-locking mechanism. The steel wire self-locking mechanism and the lifting device have good adaptability. Due to a smaller volume, the steel wire self-locking mechanism is applicable to lifting tables in various sizes.

Abstract: The present disclosure provides a high-flux sensor suitable for corrosion big data monitoring and a method of manufacturing the same. The sensor includes a first metal sheet, a second metal sheet and an insulating sheet therebetween. The two metal sheets are laminated. The metal sheets and the insulating sheet form a test piece group. A through hole is drilled in the test piece group.

Abstract: Disclosed are a superhydrophobic coating with abrasion resistance and a preparation method thereof. The coating has a composite structure formed by a nanohybrid composed of nano-SiO2 and multi-wallet carbon nanotubes, and a resin as a matrix.

Abstract: The present disclosure provides a method of manufacturing a surface nanotube array of a laser-melted stainless steel, including a step of an anodic oxidation treatment on the stainless steel, which includes performing the anodic oxidation treatment on the stainless steel by applying a voltage between the stainless steel as an anode and a graphite as a cathode in a solution formed by using sodium dihydrogen phosphate, perchloric acid, and ethylene glycol as a solute, and deionized water as a solvent.

Abstract: A binary alloy design method for a marine high-strength low-alloy (HSLA) stress corrosion-resistant steel is provided. The binary alloy design method permits synergistic inhibition of anodic dissolution and hydrogen embrittlement by binary alloying to prepare the marine HSLA stress corrosion-resistant steel, the marine HSLA stress corrosion-resistant steel has an increase of more than 50% in stress corrosion resistance in a simulated SO2 polluted marine atmospheric environment. Microalloying of one element is carried out to improve properties of a rust layer on a surface of a HSLA steel in a marine environment and reduce a electrochemical activity in a local microenvironment to inhibit the anodic dissolution. Microalloying of another element is carried out to reduce a cathodic hydrogen evolution, to increase a hydrogen trap density and to decrease a multiplicative hydrogen diffusion channel density as well as enhance a hydrogen resistance of a structure to inhibit the hydrogen embrittlement.

Abstract: The present disclosure provides a method of manufacturing a surface nanotube array of a laser-melted stainless steel, including a step of an anodic oxidation treatment on the stainless steel, which includes performing the anodic oxidation treatment on the stainless steel by applying a voltage between the stainless steel as an anode and a graphite as a cathode in a solution formed by using sodium dihydrogen phosphate, perchloric acid, and ethylene glycol as a solute, and deionized water as a solvent.

Abstract: A repair method for self-detecting and self-healing of corrosion defects in metals can achieve self-detecting and self-healing repair of an initial corrosion defect and be used to repair a micron-level corrosion defect. Furthermore, the self-detecting and self-healing repair method can be used to effectively repair an initial corrosion defect in a large-sized high-precision structural component, thus effectively improving the service safety of the high-precision metal structural component and prolonging the service life of the same.

Abstract: A steel wire self-locking mechanism and a lifting device are provided. The steel wire self-locking mechanism includes a surrounding plate and a self-locking gear and a locking device arranged in the surrounding plate, and uses a friction force of a threaded sleeve to lock the lifting device. The lifting device includes a lifting assembly and a beam assembly. The steel wire self-locking mechanism is arranged in the beam assembly, and the locking of the lifting device is realized by the steel wire self-locking mechanism. The steel wire self-locking mechanism and the lifting device have good adaptability. Due to a smaller volume, the steel wire self-locking mechanism is applicable to lifting tables in various sizes.