Abstract: Embodiments of the disclosure provides a method, apparatus, electronic device and storage medium for video bitrate switching. The method includes: in response to a determination that a condition for video bitrate switching is satisfied, determining a target video bitrate to be switched to; determining, based on a playback time of a delivered audio and video frame, target switching data for switching to a target video stream corresponding to the target video bitrate; and in response to a determination that an audio and video frame to be delivered is consistent with the target switching data, delivering audio and video frames in the target video stream to a client in sequence.

Abstract: The present invention provides an energy absorbing foam material includes at least one shape memory polymer foam having a non-impact resistant configuration in a first force-application time, an impact resistant configuration in a second force-application time at a working temperature, a first glass transition temperature equal to or lower than a working temperature in the first force-application time, and a second glass transition temperature higher than a working temperature in the second force-application time. A second elastic modulus of the shape memory polymer foam in the second force-application time is at least 10 times than a first elastic modulus of the shape memory polymer form in the first force-application time at the working temperature.

Abstract: An embodiment of this application provides a method and apparatus for testing control software, and a computer-readable storage medium to reduce the time consumed in the simulation-based debugging and enhance efficiency. The method may include obtaining test information of a plurality of fault signals; and injecting, based on the test information of the plurality of fault signals, the plurality of fault signals into a simulation environment in sequence to obtain test results of the plurality of fault signals handled by the control software, where the simulation environment may be a simulation environment of a control object of the control software.

Abstract: A feature-guided scanning trajectory optimization method for a 3D measurement robot, including: building a 3D digital model of an aircraft surface; obtaining a size of the 3D digital model; extracting features to be measured; classifying the features to be measured; calculating a geometric parameter of each type of features to be measured; generating an initial scanning trajectory of each type of features to be measured; building a constraint model of the 3D measurement robot; optimizing the initial scanning trajectory into a local optimal scanning trajectory; and planning a global optimal scanning trajectory of each type of features to be measured on the aircraft surface by using a modified ant colony optimization algorithm.

Abstract: The invention relates to multi-component shape memory threads, fibers, tubes, or tapes, which includes at least two shape-memory polymeric (SMP-N) components. Each of the at least two SMP-N components is of at least 1% of the total weight, and N is a positive integer starting from 1, and the SMP-N components have a selectively engineered shape recovery temperature (Tr) between approximately 0° C. to 130° C. Also, when TrN and TrN+1 are higher than room temperature, the threads, fibers, tubes, or tapes are configured to assume a substantially helical configuration upon heating to above TrN and lower than TrN+1 by a stimulus when an elongation of the threads, fibers, tubes, or tapes is approximately 30% to approximately 300%, and having a coil diameter from 0.5 to 10 mm and a number of the turns per cm from 5 to 30.

Abstract: The present disclosure provides an atomization device for a facial steamer, including a body, an atomization sheet, a heating mechanism, and an atomizing nozzle; the body is provided with a water inlet pipeline, a water outlet, and an inlet pressure balance channel; the heating mechanism is connected with the water outlet of the body; the atomization sheet is arranged between the water outlet and the heating mechanism; the atomizing nozzle is connected with a free end of the heating mechanism; the inlet pressure balance channel is communicated with the heating mechanism; a water storage cavity is formed in the body; and the water storage cavity is located on a balance path of the inlet pressure balance channel.

Abstract: A preparation method of a polytetrafluoroethylene (PTFE)-based nano functional composite membrane and use is provided. The PTFE-based nano functional composite membrane can be applied to prevention and resistance of icing of various types of wind turbine generator blades in winter and salt spray corrosion resistance of wind turbine blades, in the meantime, can improve the aerodynamic performance of wind turbine blade airfoils and enhance the whole surface strength of the blade and protect the blade from undergoing aging erosion, and is a new-generation multi-functional brand-new composite membrane material which can be directly explored and applied to the industrial fields of preventing adhesion and corrosion of marine fouling organisms on steel pipe piles of offshore wind power and offshore platforms, avoiding snowing and icing of high-voltage transmission towers and cables, protecting snowing and icing of bridges (stay cables and suspension cables) and the like.

Abstract: Provided are a fluid laying device, a floor tile laying robot, and a slurry laying method. The fluid laying device includes a chassis, a translation deviation correction mechanism, a slurry laying mechanism, and a slurry supply mechanism. The translation deviation correction mechanism is disposed on the chassis and includes a movable base configured to move in a direction perpendicular to a laying direction of fluid and a deviation correction detection member disposed on the movable base. The slurry laying mechanism is connected to the movable base. The slurry supply mechanism is disposed on the chassis to supply the fluid to the slurry laying mechanism. When the fluid laying device works, the deviation correction detection member controls the movable base according to received laser rays so that the slurry laying mechanism performs slurry laying linearly along the laying direction.

Abstract: A high-temperature high-linear-pressure micro-eutectic method for enhancing a strength of a polytetrafluoroethylene (PTFE)-based membrane is disclosed. The method comprises the following steps: pushing a PTFE-based nano functional composite membrane forwards at a speed of 6-8 m/min in a high-temperature high-linear-pressure micro-eutectic cavity with a length of 1.5 m at a temperature of 380° C., controlling a linear pressure of a surface of the PTFE-based membrane to be 50-80 N/m, and under a coiling traction of a membrane coiling roller outside the cavity, enabling membrane molecular chains to shrink and generate eutectic phases, wherein multiple micro-eutectic molecular structures are arranged in parallel, and the PTFE-based nano functional composite membrane has a density of 2.

Abstract: This application discloses a program execution method, which may be applied to the field of program processing. The method includes: receiving a call request of a first program for a small stub function; loading the small stub function based on the call request; and determining, based on the small stub function, whether to load a complementary real function corresponding to the small stub function. A function that may actually need to be called by the first program is the complementary real function, and the small stub function may be understood as a buffer for loading the complementary real function. Whether to load the complementary real function can be controlled through addition of the buffer, so that a requirement of the first program for a running memory can be reduced.

Abstract: A method for nano-depth surface activation of a PTFE-based membrane and relates to the technical field of polymer composites is disclosed. The method comprises the following steps: covering a functional surface of a PTFE-based nano functional composite membrane, performing surface activation treatment on a single surface of the membrane to which a bonding adhesive is applied, and migrating and complexing a high-toughness cold bonding adhesive tape on the membrane surface, with an activated structure layer, of the PTFE-based nano functional composite membrane through a mechanical adhesive applying device to form an adhesive-membrane complex. An extremely strong affinity and a high-strength bonding performance are generated between the membrane and the adhesive, and the adhesive-membrane complex is formed. Integration of membrane/adhesive bonding complexing, membrane/membrane bonding complexing and membrane/adhesive layer bonding is realized.

Abstract: A preparation method of a polytetrafluoroethylene (PTFE)-based membrane for preventing and removing ices covering wind turbine blades is provided and the method comprises: preparing a membrane into a PTFE rod material with polymerized monomers by using monomer polymerization methods such as blending, pre-compressing and pushing; making the membrane into a PTFE-based homogeneous membrane with micropores and nano and micron scale concave-convex geometrical ultra-structure morphologies under the condition that the membrane is cracked to generate a laminar exfoliated fabric-like structure in the hot calendaring process of the PTFE rod material by using a hot calendaring and fusion polymerization method; and applying the PTFE-based homogeneous membrane to blades of a large wind turbine in operation.

Abstract: The disclosure discloses a numerical simulation method of an influence of a polytetrafluoroethylene (PTFE)-based membrane on an aerodynamic characteristic of a wind turbine blade, and relates to the technical field of polymer composites. The simulation method comprises the following steps: selecting a wind turbine generator, a blade airfoil and a PTFE-based nano functional membrane; setting a numerical simulation computation network and a computation area of a wind energy capture area; determining main computation parameters and a Reynolds number for aerodynamic characteristic computation; establishing a geometrical model whose airfoil boundary extends by 0.26 mm (membrane thickness) along a normal direction to obtain a new computational geometry; computing by using a hydrodynamic computation method and a finite volume method; and obtaining an influence number simulation computation result.

Abstract: The present disclosure relates to the technical field of solid waste recycling and fabricated buildings, and provides a solid waste large-mixing-amount concrete prefabricated laminated slab and a preparation method thereof. The solid waste large-mixing-amount concrete prefabricated laminated slab provided by the present disclosure comprises a prefabricated layer and a laminated layer. Transverse grooves and longitudinal grooves are formed in the surface of the prefabricated layer. During application, the grooves can be used for erecting pipelines, the contact area of the prefabricated layer and the laminated layer can also be increased, the combined effect of new concrete and old concrete is improved, the integrity of a floor slab is enhanced, and the effect of improving the overall stress capacity of the floor slab is achieved.

Abstract: The present disclosure relates to the technical field of solid waste recycling and fabricated buildings, and provides a solid waste large-mixing-amount concrete prefabricated laminated slab and a preparation method thereof. The solid waste large-mixing-amount concrete prefabricated laminated slab provided by the present disclosure comprises a prefabricated layer and a laminated layer. Transverse grooves and longitudinal grooves are formed in the surface of the prefabricated layer. During application, the grooves can be used for erecting pipelines, the contact area of the prefabricated layer and the laminated layer can also be increased, the combined effect of new concrete and old concrete is improved, the integrity of a floor slab is enhanced, and the effect of improving the overall stress capacity of the floor slab is achieved.

Abstract: The present invention discloses a large-scale model testing system of a floating offshore wind power generation device, and a method for manufacturing the large-scale model testing system. The large-scale model testing system comprises a floating wind power generation device model, model response measurement systems and environmental parameter measurement systems. The floating wind power generation device model comprises a floating foundation and a tower, wherein a wind turbine is connected to the top of the tower. A plurality of anchoring devices is connected to the side surface of the floating foundation. Each model response measurement system comprises an IMU unit, a wind turbine monitoring unit and an anchoring tension measurement unit. Each environmental parameter measurement system comprises a buoy-type wave height meter, a wind speed and direction meter and a flow velocity and direction meter.