7results about How to "Reasonable selection" patented technology

The utility model provides automatic welding production line equipment for civil air defense steel structure door leaves, and belongs to the technical field of steel structure door leaf production and welding. A first welding station, a first overturning station, a second welding station, a transition station, a third welding station, a second overturning station and a discharging station are sequentially arranged on the linear rail in the length direction of the linear rail. The first welding station, the second welding station and the third welding station are each provided with a lifting carrying trolley, two grouping supporting tables and two cantilever welding robot devices. Two lifting turnover devices are arranged on each of the first turnover station and the second turnover station; the transition station and the discharging station are each provided with two grouping supporting tables. According to the welding production line equipment, the lifting carrying trolley is adopted to complete the transfer work of the steel structure door leaf on the production line, the cantilever welding robot device is adopted to complete the main welding procedure of the steel structure door leaf, the layout of all stations and the selection of parts are reasonable, and the production efficiency is high.

The embodiment of the invention discloses a video coding method and device, electronic equipment and a computer readable medium. A specific embodiment of the method comprises the following steps: acquiring a video; for each frame of image, determining an average gradient value; in response to the fact that the average gradient value is not lower than a first threshold value, determining a motion vector precision mode as a first mode; in response to the condition not higher than the first threshold and not lower than a second threshold, determining that the motion vector precision mode is a second mode; in response to not higher than the second threshold, determining the motion vector precision mode as a third mode; obtaining each coding unit; determining a self-adaptive motion vector precision tool; setting a motion vector precision range; performing encoding processing on each encoding unit to generate encoding information; and determining each piece of coding information as video coding information. According to the embodiment, the overall characteristics of the image are utilized, so that the selection range of the motion vector precision is more reasonable, the coding efficiency is improved, the consumption of computing resources is reduced, and the overall performance of video coding is improved.

This invention provides a high-voltage DC SSPC and a method for charging capacitive loads, enabling the high-voltage SSPC to carry capacitive loads. The capacitive load circuit of this invention can adaptively distinguish whether the downstream load is short-circuited or capacitive. At the same time, this invention can adaptively adjust the upper limit of the capacitive load based on the power selection of the hardware current-limiting resistor. When the capacitive load of the downstream load exceeds the upper limit of the SSPC's capacitive load capacity, it can identify and shut down, protecting the capacitive load circuit from damage.

The present invention provides a photovoltaic support structure reduction optimization method, which belongs to the field of photovoltaic power generation technology, and includes the following steps: step S1: setting a control target, step S2: forming a weight list, step S3: component optimization, step S4: strength and safety review, if the review result meets the specification requirements, then the optimization result is obtained, and the step S5 is jumped to, if the review result does not meet the specification requirements, then the step S3 is jumped to; step S5: optimization result comparison, according to the optimization result obtained by the strength and safety review, the control target in step S1 is compared, if the control target is achieved, the structural form of the photovoltaic support is formed according to the optimization result, and the optimization process ends, if the control target is not achieved, then the step S3 is jumped to perform a new round of photovoltaic support structure reduction optimization. Through this method, the cost of photovoltaic power generation projects can be controlled and the investment income of photovoltaic projects can be improved.

The present invention relates to the technical field of building materials, and discloses an ultra-lightweight high-strength geopolymer-based composite material and a preparation method thereof. The ultra-lightweight high-strength geopolymer-based composite material comprises: a gelling material, hollow microspheres, an activator, and polyethylene fibers. The gelling material comprises: granulated blast furnace slag and microsilica powder; the activator comprises: water, sodium silicate, or a mixture of sodium silicate and sodium carbonate. The present invention uses sodium silicate or a mixture of sodium silicate and sodium carbonate as an activator, and the sodium silicate modulus of the activator is 1.2 to 1.6, so that the product has a higher early compressive strength. At the same time, the present invention uses hollow microspheres as lightweight micro-aggregates to make the composite material have properties such as light weight and high strength. The polyethylene fiber can improve the defects of low tensile strength and poor toughness of ordinary geopolymer matrices, play a role in crack prevention and toughening, and is conducive to promoting the construction and development of structures such as super high-rise buildings, large-span buildings, and offshore platforms.

This invention discloses a method for extracting high-purity ammonium tetramolybdate from a waste oil hydrogenation catalyst. S1, Primary ammonia dissolution: 28% ammonia water, water, and molybdenum acid extracted from the waste oil hydrogenation catalyst are added to a primary dissolution vessel. The mixture is stirred until the molybdenum acid is fully dissolved. The reaction time is controlled to 1 hour. The pH of the dissolved solution is 7-8. The molybdenum acid has a water content of 35% and a Mo content of 46-50%. This invention employs a stepwise deep impurity removal process of "magnesium chloride for phosphorus removal + 231 resin for vanadium removal," and sets up dual phosphorus and vanadium content detection to ensure that phosphorus <0.01g / L and vanadium <0.01g / L before proceeding to subsequent processes. The molybdenum-vanadium separation coefficient of 231 resin is much higher than that of ordinary resin, effectively avoiding impurity entrainment.

According to the brake control unit of the locomotive brake of the rail engineering vehicle, under the general trend of development of existing railway equipment, the existing locomotive brake of the rail engineering vehicle cannot meet the requirements of intelligentization and informatization of the rail engineering vehicle; and the functions of fault diagnosis, fault analysis, information recording, data communication, automatic driving control and the like of the rail engineering vehicle cannot be realized. Starting from the requirement of the rail engineering vehicle for the locomotive brake, the main target position meets various control functions of the rail engineering vehicle, and the rail engineering vehicle brake control system is easy to adapt to various rail engineering vehicles. And the functions of fault diagnosis, fault analysis, information recording, data communication, automatic driving control and the like of the rail engineering vehicle can be realized. And the combination of a mechanical valve and an air valve of the JZ-7 air brake is realized, and meanwhile, stable electric control and mechanical control can be provided.