17results about How to "Obvious superiority" patented technology

The invention discloses an earth and rockfill dam burst peak flow prediction method and a storage medium, and belongs to the technical field of hydraulic engineering technologies. On the basis of continuous arrangement and expansion of a historical database, a comprehensive database containing outburst case information of 295 earth and rockfill dams is formed, and correlation analysis is carried out on different dam break parameters and outburst peak discharge. Extracting five influence parameters of reservoir capacity above the bottom of the breach during dam break, dam height, dam reservoir capacity, final depth of the breach and water depth above the bottom of the breach during outburst, and constructing a new earth and rockfill dam outburst parameter prediction model considering different dam types and outburst modes. Compared with 20 groups of typical parameter models existing at home and abroad, the calculation result shows that the root mean square error (Erms) and the correlation coefficient (R2) of the provided prediction model are 0.38 and 0.82 respectively, and compared with other models, the model has certain advantages, and the accuracy of the model is verified.

The invention discloses an all-solid-state battery and a preparation method thereof, and belongs to the technical field of solid-state batteries. Comprising electrolyte crushing, mixing and coating processes, an acoustic resonance method is used in each process, a final solid electrolyte is obtained, the electrode material is prepared through the acoustic resonance method based on the prepared solid electrolyte, the specific capacity of the electrode material prepared through the acoustic resonance method is improved, and compared with an existing mainstream ball milling process, the specific capacity of the electrode material is greatly improved. And the process time is reduced from several hours to minute level, so that the efficiency of each flow is greatly improved, and the preparation efficiency of the whole all-solid-state battery is further improved.

The invention provides a tumor medical image classification method of zero sample evolution NAS based on double-index collaborative evaluation, which comprises the following steps: collecting tumor medical image data, and constructing a data set containing a tumor focus image and a normal tissue image; constructing an extended search space based on a cell structure, wherein the search space comprises a basic operation set, the cell structure and a network overall structure; steady-state evolution algorithm parameters are set, and steady-state evolution initialization is carried out to obtain an initial candidate architecture; taking a double-index comprehensive score calculated by the information rate and the FIM stability as a comprehensive index for evaluating the current candidate architecture, updating the candidate architecture through a steady-state evolutionary algorithm based on a dynamic optimization mechanism until the maximum evolutionary algebra is reached, and obtaining an optimal architecture; and training the optimal architecture by using the data set, and carrying out tumor medical image classification by using the trained optimal architecture. According to the method, the dependence on the annotated data is reduced, the consumption of computing resources is reduced, and meanwhile, the diagnosis efficiency and accuracy are improved.

The present invention discloses a large vehicle anti-collision device, which relates to the field of vehicle protection, including an anti-collision seat, a buffer box and an anti-collision frame; the buffer box includes an anti-collision plate, a bearing tube and a sliding plate; a partition is provided in the middle of the bearing tube, the right side of the partition is connected to the sliding plate, the upper side of the partition is a cavity, and the lower side of the partition is a water cavity; a water pipe is fixed on the sliding plate; a plurality of positioning grooves are provided on the anti-collision seat, and a positioning rod is fixed horizontally in the positioning groove; an anti-collision strip is provided on the left side of the positioning rod; a limiting ring is provided in the middle of the outer peripheral side of the bearing tube, and a plurality of first springs are provided on the right end face of the limiting ring; a telescopic mechanism is provided on the right end face of the bearing tube. The anti-collision performance of the device is improved by providing the anti-collision seat, the buffer box and the anti-collision frame; the energy generated by the collision can be absorbed by providing the water cavity, the water pipe and the positioning rod; the first spring and the telescopic mechanism are used to buffer the impact force on the anti-collision seat and the buffer box, and the limiting ring is used to limit the buffer box when it is reset after the collision.

This invention discloses a construction method for rotary drilling piles used in water conservancy and hydropower engineering. The method involves setting up a first row and a second row of rotary drilling piles at a predetermined elevation on the river-facing side of the foundation pit. These piles interlock and their tops are flush. A capping beam is also included at the top of the first and second rows of rotary drilling piles, connecting and fixing them into a vertical, closed wall. A diaphragm wall is also installed inside the foundation pit, with one end connected to the solid wall and the other end connected to the bedrock. The interlocking of the two rows of rotary drilling piles, along with the construction of the capping beam and diaphragm wall at the top of the piles, forms a continuous, closed foundation pit protection structure. The entire construction process facilitates the excavation and layout of the outlet retaining wall foundation after the flood season, saves construction time, reduces construction costs, and provides functions such as cofferdam seepage prevention, scour prevention, soil retention, foundation pit protection, and foundation bearing capacity.

The invention relates to a small and convenient oxygen isotope nuclear reaction target manufacturing process and device, a reaction target lining and a sputtering target material are arranged in a vacuum chamber of a magnetron sputtering target manufacturing device, a sputtering electric field is provided by adopting a radio frequency power supply, and the flow of argon and oxygen filled into the vacuum chamber and the pressure in the vacuum chamber are controlled; the chromium oxide film layer is sputtered on the reaction target lining at a stable rate to form a film, and the oxygen isotope nuclear reaction target is prepared. The content of nitrogen in the chromium oxide film layer prepared by the process is extremely low, the abundance of oxygen isotope reaches 70%, and the applicability of the film layer in nuclear reaction cross section measurement is greatly enhanced. The method has the remarkable advantages of efficient coating, excellent film quality, simplicity and convenience in operation, environment friendliness, energy conservation and the like. The magnetron sputtering device improves the sputtering efficiency and the power efficiency through the synergistic effect of a magnetic field and an electric field, and ensures uniform deposition and strong adhesive force of the film. The device is compact in structure, flexibly adapts to various target materials and process requirements, reduces environmental pollution and conforms to the green production concept.

The invention relates to a noise suppression power supply system based on underwater large-scale remote signal high-fidelity pickup, the noise suppression power supply system realizes background noise suppression and weak signal detection improvement in a deep and far sea environment, and the noise suppression power supply system comprises a DC / DC module, the DC / DC module is responsible for converting a DC375V high voltage transmitted by a deep sea station battery pack into a working voltage DC24V required by underwater equipment, and providing the working voltage DC24V to an underwater data acquisition circuit of the detection node electronic cabin; an SD50-1M5 module is adopted in the DC / DC module, a power supply is arranged in the SD50-1M5 module, an input filter is designed at the front stage, and a DC / DC converter is arranged at the rear stage; the input end of the input filter is provided with a silicon carbide diode, an input capacitor and an input protector. Compared with an existing mainstream power supply and transmission system, the noise suppression power supply system has obvious superiority in background noise suppression and weak signal detection capability.

The invention discloses an advanced control system and method for an azeotropic distillation dehydrating tower of a purified terephthalic acid device, which are applied to the overall optimization control of a dehydrating tower system and comprise a dehydrating tower system, a DCS (Distributed Control System), an OPC (Optical Product Control) server, an advanced control system and a display feedback system. The method comprises the following steps: acquiring real-time operation data through a dehydrating tower system, and sending the data to a DCS (Distributed Control System); the DCS control system transmits the real-time data to an OPC server; the OPC server periodically transmits historical data and real-time data to the advanced control system; the advanced control system performs control instruction optimization according to the received data and feeds back an optimization result to the DCS control system; the DCS control system carries out control variable adjustment in the tower according to a feedback result; and operating variables and control variables of the three towers are coordinated through a predictive control model, a pressure correction temperature soft measurement model and a dehydration section controller model. The interaction among a plurality of towers is coordinated, the equipment stability is improved, the energy consumption is reduced, and the material loss is reduced.

The invention provides a method for pre-enriching lead, zinc and silver in low-grade lead-zinc-silver ore, and belongs to the technical field of ore dressing. The method comprises the steps that firstly, to-be-treated low-grade raw lead-zinc-silver ore is crushed, then standard sieves with different hole diameters are sequentially used for screening twice, an oversize product II and an undersize product II are obtained, the undersize product II is separated through a spiral chute, the oversize product II is separated through dense medium separation equipment, and the separated oversize product II is separated through the dense medium separation equipment, so that the low-grade raw lead-zinc-silver ore is obtained. And finally, lead-zinc-silver rough concentrate I, lead-zinc-silver rough concentrate II and tailings are obtained. According to the method, lead, zinc and silver in the low-grade lead-zinc-silver ore raw ore are pre-enriched, the high-grade lead-zinc-silver ore is obtained and enters the next ore dressing process, the ore dressing process can be simplified, and the ore dressing cost of the ore dressing process can be greatly reduced; heavy media are recycled, so that the production cost is reduced; the obtained tailings do not contain any beneficiation reagent, and can be directly used as a filling material to fill a mine goaf or sold as gravel, so that the production cost can be effectively reduced or economic benefits can be generated.

The invention relates to the technical field of rhodamine derivatives, and particularly discloses a selenium-containing rhodamine derivative and application thereof. The rhodamine derivative containing selenium heavy atoms is innovatively provided, and the visible light absorption wavelength of the rhodamine derivative is close to a near-infrared region of 700 NM, so that the rhodamine derivative can penetrate through deeper tissue parts for deep treatment; meanwhile, the rhodamine derivative containing the selenium heavy atoms also shows a high triplet state conversion rate, and can efficiently generate active oxygen species under an illumination excitation condition, so that the killing effect on cancer cells and cancer tissues is enhanced. Compared with the prior art, the rhodamine derivative containing the selenium heavy atoms can realize efficient removal of cancer cells and cancer tissues by only needing nanomole-level concentration, so that the treatment efficiency is remarkably improved, and the drug use dosage is reduced; meanwhile, the preparation process of the rhodamine derivative is simple and easy to implement, high synthesis yield can be obtained, and the rhodamine derivative is more suitable for large-scale and low-cost production and application.

The application discloses a method for converting ultra-high-concentration formaldehyde wastewater into formic acid solution, and comprises the following steps: S1, after heating formaldehyde wastewater, a pH regulator is added to obtain hot acidic formaldehyde wastewater; S2, after adding hydrogen peroxide, a metal catalyst and an organic acid inducer to the hot acidic formaldehyde wastewater in step S1 under ultraviolet light, the hot acidic formaldehyde wastewater is fully stirred to obtain formic acid solution. The application solves the problems of formaldehyde wastewater treatment efficiency, sewage treatment cost, formaldehyde wastewater treatment capacity and formaldehyde conversion selectivity.

The application provides a method for preparing a defect-free MOF membrane by a MOF gradient distribution seeding method. According to the fact that the density of ZIF-8 seeds is greater than the density of a polymer solution, a gradient distribution of the ZIF-8 seeds in a phase inversion membrane is obtained, and abundant nucleation sites are provided for subsequent ZIF-8 layer growth. The distribution of the ZIF-8 seeds in the membrane holes increases the rigidity of the phase inversion base membrane, and simultaneously increases the adhesion of the surface of the base membrane and the ZIF-8 layer. The addition of tannic acid in the ZIF-8 precursor solution assists the growth of the ZIF-8 layer, the tannic acid has abundant hydroxyl groups, provides CO2 groups, and improves the selectivity of the membrane for separating H2 / CO2. The ZIF-8 seeds in the compact defect-free ZIF-8 membrane rich in hydroxyl groups have a gradient distribution, which improves the mechanical properties of the base membrane and the adhesion of the ZIF-8 layer, and the ZIF-8 membrane prepared by directly seeding ZIF-8 seeds on the base membrane shows obvious superiority.

The application provides a fast phase unwrapping method based on tail non-convex regularization, and aims at solving the following two technical problems of the existing phase unwrapping algorithm: one is that details are lost due to the discontinuity of the image edge; and the other is that it is difficult to accurately realize phase unwrapping when facing high complexity or large phase jumps. The steps of the application are as follows: based on the wrapped image, a non-convex tail optimization model with box constraint is constructed; the non-convex tail optimization model is solved by using a completely split primal-dual algorithm under the condition that the support set is empty, so that an initial phase is obtained; errors in the initial phase estimation are corrected through tail minimization, and the support set is dynamically updated, so that an unwrapped image is obtained. Compared with the traditional phase unwrapping algorithm, the application combines the non-convex regularization with the tail minimization strategy, so that the accuracy and robustness of the phase unwrapping are improved, and the application has significant superiority in key evaluation indexes such as signal-to-noise ratio and structural similarity.

The invention discloses earhole lining press-fitting equipment and a lining press-fitting method.The earhole lining press-fitting equipment comprises a feeding device, a positioning device, a correcting device and a first press-fitting device, and the feeding device sequentially moves among a feeding station, a positioning station, a correcting station and a press-fitting station; the positioning device is arranged on the positioning station and is used for detecting the positions of the flat lug part and a lug hole in the flat lug part under the condition that the feeding device is axially fed into the flat lug part of the product main body; the correcting device is arranged on the correcting station and used for correcting and leveling the flat lug part under the condition that the flat lug part is axially fed by the feeding device according to detection data of the positioning device, and the first press-fitting device is arranged on the press-fitting station and used for press-fitting the lining part into the lug hole; therefore, the flat lug parts of the cylinder barrels of the oil cylinders of different models can be automatically positioned, leveled and corrected, and the lining parts can be automatically pressed, so that the effects of improving the assembly efficiency, reducing the labor intensity and improving the pressing assembly precision are achieved.

The invention provides a wireless roaming network AP and Extender selection optimization method based on big data, and relates to the technical field of network communication, the original STA trigger is changed into STA or big data trigger according to a modified roaming trigger mechanism; the AP collects STA RSSI, channel load and surrounding AP list information and periodically submits the information to the big data platform; the big data platform introduces a machine learning technology to train the previously collected wireless channel link parameters and throughput performance data to drive when to trigger roaming; the big data decides whether to roam or not, if yes, roaming is started, and the STA sends a roaming request to the AP; sending a roaming priority list to big data according to the AP; big data is returned to a roaming priority list; whether the STA is successfully connected with the target AP or not is judged, and if yes, roaming is ended; the invention introduces a wireless roaming network AP and Extender selection optimization method based on big data to improve the stability of STA roaming switching and the user experience after roaming.

The present invention relates to a Co / TiO x Catalyst and its preparation method and application, the present invention belongs to the technical field of catalyst. x The catalyst is TiO x As a carrier, cobalt oxide nanoparticles were prepared by mixing with TiO x Strong carrier-metal interaction occurs for loading; the Co / TiO x There are unsaturated low-valent titanium atoms and hydroxyl groups on the catalyst surface; the TiO x Contains TiO, Ti2O3, Ti3O5 low-valent titanium oxide components. Compared with Co / TiO2 catalyst, Co / TiO x The reaction activity in the photothermal catalytic carbon dioxide reduction process has significant advantages. It is prepared by rotary distillation impregnation method, which can achieve scale-up production of catalysts at the level of 10 to 100 grams.

The utility model discloses a power module device of a power electronic transformer, which belongs to the technical field of power electronic transformers and comprises a shell, a PMC (permanent magnet synchronous controller) board card assembly module, a switch radiator assembly module and a direct-current capacitor, the PMC board card assembly module, the switch radiator assembly module and the direct-current capacitor are positioned in the shell, and both the PMC board card assembly module and the switch radiator assembly module are positioned above the direct-current capacitor. The switch radiator assembly module comprises a switch assembly, a fin radiator and an air duct cover; the switch assembly is installed on the side wall of the fin radiator. Holes formed in the air channel cover, the side wall of the fin radiator and the shell form an air channel. The heat management problem of the power module is fully considered, the electric device is directly assembled on the heat radiator, the heat radiation efficiency is improved, the power module can work normally at high temperature, the service life of the power module is prolonged, and the reliability of the power module is improved.