Abstract: A method for determining lower radius limit of movable throat of shale is provided, and it includes: performing a low-temperature nitrogen adsorption test on a target shale to obtain first pore radii; performing a high-pressure mercury injection test on the target shale to obtain second pore radii; performing a nuclear magnetic resonance test on the target shale to obtain third pore radii; obtaining a relationship diagram of distribution frequencies and pore radii according to three pore radii; distinguishing, according to the pore radii, relationship diagram data, and performing normalization processing to determining a relationship curve of normalized frequency data and the pore radii; and determining a lower radius limit of movable throat of shale according to relationship curve. A problem of describing characteristics of shale occurrence space with complex pore structures and strong heterogeneity is solved, the method is suitable for determining lower radius limit of movable throat of shale.

Abstract: A method for determining lower radius limit of movable throat of shale is provided, and it includes: performing a low-temperature nitrogen adsorption test on a target shale to obtain first pore radii; performing a high-pressure mercury injection test on the target shale to obtain second pore radii; performing a nuclear magnetic resonance test on the target shale to obtain third pore radii; obtaining a relationship diagram of distribution frequencies and pore radii according to three pore radii; distinguishing, according to the pore radii, relationship diagram data, and performing normalization processing to determining a relationship curve of normalized frequency data and the pore radii; and determining a lower radius limit of movable throat of shale according to relationship curve. A problem of describing characteristics of shale occurrence space with complex pore structures and strong heterogeneity is solved, the method is suitable for determining lower radius limit of movable throat of shale.

Abstract: In a handrail including a carcass, a stretch inhibitor within the carcass, and a sliding layer bonded to the carcass, at least a portion of the carcass has a gas phase dispersed in a solid polymer matrix. The gas phase can reduce a density of the carcass by at least 5% or 10%, or about 15%, as compared to a density of the polymer matrix. The carcass can have a generally uniform distribution of gas bubbles in the polymer matrix, which can define a generally closed cell structure in the polymer matrix. The gas phase can be formed of particles of a syntactic foam dispersed in the polymer matrix. The handrail can further include a cover. The carcass and the cover can be formed of thermoplastic materials, and the cover can represent between 10 and 30% of the overall TPU required for the handrail.

Abstract: In a handrail including a carcass, a stretch inhibitor within the carcass, and a sliding layer bonded to the carcass, at least a portion of the carcass has a gas phase dispersed in a solid polymer matrix. The gas phase can reduce a density of the carcass by at least 5% or 10%, or about 15%, as compared to a density of the polymer matrix. The carcass can have a generally uniform distribution of gas bubbles in the polymer matrix, which can define a generally closed cell structure in the polymer matrix. The gas phase can be formed of particles of a syntactic foam dispersed in the polymer matrix. The handrail can further include a cover. The carcass and the cover can be formed of thermoplastic materials, and the cover can represent between 10 and 30% of the overall TPU required for the handrail.

Abstract: The presently disclosed technology discloses an unmanned aerial vehicle control method and apparatus. A device displays a map. The device detects a first movement path on a touch-sensitive surface of the device. The device overlays a trajectory on the map in accordance with the first movement path. The device automatically generates a number of waypoints along the trajectory. and the device displays the waypoints on the trajectory and sends instructions to an unmanned vehicle in accordance with the trajectory and the waypoints. The unmanned vehicle moves in accordance with trajectory by executing the instructions.

Abstract: The presently disclosed technology discloses an unmanned aerial vehicle control method and apparatus. A device displays a map. The device detects a first movement path on a touch-sensitive surface of the device. The device overlays a trajectory on the map in accordance with the first movement path.; The device automatically generates a number of waypoints along the trajectory. and the device displays the waypoints on the trajectory and sends instructions to an unmanned vehicle in accordance with the trajectory and the waypoints. The unmanned vehicle moves in accordance with trajectory by executing the instructions.

Abstract: A hybrid supercapacitor comprises a negative electrode made of lithium-absorbing material, a positive electrode with high surface area carbon, and a separator inserted in between containing nonaqueous solvent solution of lithium salt as an electrolyte, wherein air-stable lithium metal powder is coated or added to the above negative electrode. The hybrid supercapacitor of the present invention shows a high capacity, high power, long durability, and is easy to manufacture.