Abstract: Provided are a high temperature-resistant composite nanofiltration membrane and a preparation method thereof. The high temperature-resistant composite nanofiltration membrane includes a base membrane and a polyamide membrane arranged on the base membrane; wherein the polyamide membrane is prepared from raw materials comprising: an amine, an inorganic salt, a silane additive, a polyacyl chloride, and an oil phase solvent; and the silane additive is at least one selected from the group consisting of 3-aminopropyltriethoxysilane, divinyltriaminopropyltrimethoxysilane, N-cyclohexyl-?-aminopropyltrimethoxysilane, and trimethoxy[3-(phenylamino)propyl]silane.

Abstract: Embodiments are disclosed for a compensating circuit for a boost circuit that outputs a voltage that is a function of a voltage signal. In one or more examples, the compensation circuit may include a gain that is adjustable in proportion to voltage output of the boost circuit and inversely proportionate to input current to the boost circuit.

Abstract: This disclosure relates to systems for wellbore drilling and methods for preparing wellbore drilling fluid. The system can include a drilling fluid tank that holds wellbore drilling fluid for introduction into a wellbore, an additive distribution component fluidly coupled to the drilling fluid tank that holds a first additive, and a computing device communicatively coupled to the additive distribution component. The methods can include a computing device performing at least the following: receiving drilling parameters that identify wellbore drilling conditions of a wellbore drilling system, calculating a thermochemical sulfate reduction (TSR) proxy value of the wellbore. In response to determining that a predicted hydrogen sulfide concentration meets a predetermined threshold, the computing device can determine a first quantity of a first additive to be added to the wellbore drilling fluid and combine the first quantity of the first additive with the wellbore drilling fluid.

Abstract: A mirror adjusting device, a reflecting assembly, a LiDAR, and an intelligent driving apparatus are provided. The mirror adjusting device includes a mounting bracket, a fixing bracket, and an elastic assembly. The mounting bracket includes a mirror mounting structure for mounting a mirror at one side and an adjusting part at the opposite side. The adjusting part includes a first curved wall protruding in a direction away from the mirror mounting structure, and the middle of the first curved wall is provided with a connecting structure. The fixing bracket includes a groove at one side and a through hole on the other side. The groove includes a second curved wall recessed toward the other side of the fixing bracket, and the first curved wall abuts against the second curved wall. The elastic assembly includes an elastic member and a connecting member.

Abstract: A mirror adjusting device, a reflecting assembly, a. LiDAR, and an intelligent driving apparatus are provided. The mirror adjusting device includes a mounting bracket, a fixing bracket, and an elastic assembly. The mounting bracket includes a mirror mounting structure for mounting a mirror at one side and an adjusting part at the opposite side. The adjusting part includes a first curved wall protruding in a direction away from the mirror mounting structure, and the middle of the first curved wall is provided with a connecting structure. The fixing bracket includes a groove at one side and a through hole on the other side. The groove includes a second curved wall recessed toward the other side of the fixing bracket, and the first curved wall abuts against the second curved wall. The elastic assembly includes an elastic member and a connecting member.

Abstract: The present application discloses a LiDAR and an autonomous driving vehicle. The LiDAR includes a rotary device, a laser transceiving assembly, and a reflecting assembly. The rotary device has a first rotary part and a second rotary part that are configured to rotate relative to each other around a rotary axis. The laser transceiving assembly is connected to the first rotary part and configured to emit an emergent laser beam and receive a reflected laser beam. The reflecting assembly is connected to the second rotary part and has at least two reflectors. The at least two reflectors are arranged around the rotary axis, and at least two of included angles between the reflectors and a plane perpendicular to the rotary axis are different. In the present application, the same reflector can reflect both the emergent laser beam and the reflected laser beam.

Abstract: An energy-saving loop heat pipe apparatus and an application are provided. The loop heat pipe apparatus comprises a capillary pump component and an evaporation unit component. The loop heat pipe apparatus further comprises at least one heat exchanger disposed between the capillary pump component and the evaporation unit component for heating, by using heat of a circulating working medium in the loop heat pipe, the circulating working medium about to enter the evaporation unit component.

Abstract: An image question answering method includes: extracting a question feature representing a semantic meaning of a question, a global feature of an image, and a detection frame feature of a detection frame encircling an object in the image; obtaining a first weight of each of at least one area of the image and a second weight of each of at least one detection frame of the image according to question feature, global feature, and detection frame feature; performing weighting processing on global feature by using first weight to obtain an area attention feature of image; performing weighting processing on detection frame feature by using second weight to obtain a detection frame attention feature of image; and predicting an answer to question according to question feature, area attention feature, and detection frame attention feature.

Abstract: An image question answering method includes: extracting a question feature representing a semantic meaning of a question, a global feature of an image, and a detection frame feature of a detection frame encircling an object in the image; obtaining a first weight of each of at least one area of the image and a second weight of each of at least one detection frame of the image according to question feature, global feature, and detection frame feature; performing weighting processing on global feature by using first weight to obtain an area attention feature of image; performing weighting processing on detection frame feature by using second weight to obtain a detection frame attention feature of image; and predicting an answer to question according to question feature, area attention feature, and detection frame attention feature.