27results about How to "Cost control" patented technology

The application provides a preparation method of dihydroxy boron phenylalanine and intermediates thereof. The method comprises the following steps: mixing 4-halogen-Boc-L-phenylalanine of formula (II) with an alkyl borate, and adding a Grignard reagent to obtain an intermediate compound of formula (I): (I) (II).

The utility model relates to a kind of seats, more particularly to a gynecological examination table, it includes: base;Bed body, bed body includes sequentially connected first folding part, second folding part and third folding part;First fixing device, first fixing device includes first rotary lever and first fixed sheet, first fixed sheet is provided with first positioning hole, first rotary lever is installed on base, the rotation axial direction of first rotary lever is parallel with the rotation axial direction of first folding part, first fixed sheet is fixedly connected with first rotary lever, first folding part is provided with first positioning rod in the direction of first fixed sheet, first positioning rod is rotatably connected with first folding part, first positioning rod is arranged in first positioning hole;Same still be provided with corresponding second fixing device.By the structure of the utility model, it can be through the friction jam between positioning rod and fixed sheet, simple structure, realize the seat adjustment structure of easier installation, and cost is lower.

The application discloses a mechanical-chemical preparation method of potassium borohydride, and belongs to the technical field of potassium borohydride preparation. The method is characterized in that magnesium-based reducing agent, hydrogen supplementing agent and potassium borate hydrate are used to prepare potassium borohydride through a mechanical-chemical method under a protective atmosphere, and the prepared potassium borohydride is subjected to yield testing and purification under an air atmosphere. The method can realize solid-phase mechanical-chemical reaction under a vibration or low-energy planetary ball milling condition, breaks through the limitation that the reaction must be driven by high-energy ball milling equipment in the prior art, and can realize synthesis of potassium borohydride with a yield of more than 90% through low-energy planetary ball milling, so that the method has large-scale production application potential. In addition, the method has the advantages of simple process, convenient operation and low cost.

The application provides a coal-based intelligent decision generation method and device, equipment and storage medium, and belongs to the technical field of intelligent decision, which comprises the following steps: coal price prediction is performed based on coal quality index data and standardized coal market data to obtain coal price prediction trend data; the coal quality index data is a comprehensive index representing the physical and chemical properties and industrial applicability of coal; knowledge vectorization processing is performed on standardized coal information text data to obtain a plurality of knowledge vectors; similarity calculation is performed based on a target retrieval vector and each knowledge vector to screen a knowledge vector corresponding to the maximum similarity; and a coal decision report is generated based on the knowledge vector corresponding to the maximum similarity and the coal price prediction trend data. The coal-based intelligent decision generation method and device, equipment and storage medium provided by the application can improve the accuracy and reliability of the generated coal-based intelligent decision.

This application relates to a method, system, and related equipment for engineering cost prediction based on MLP (Mechanical, Material, and Practical) estimation, belonging to the technical field of engineering cost estimation. The method includes: acquiring construction stage information of the target project, including the scheme study stage, preliminary design stage, and design expansion stage; acquiring construction variables for the corresponding construction stages based on the construction stage information; acquiring a preset MLP cost prediction model, which includes different quantities of engineering costs corresponding to different construction stages; and acquiring cost tables for different construction stages based on the construction variables and the MLP cost prediction model. This application has the effect of better displaying the cost changes that may occur during the project.

This disclosure relates to a video processing method, apparatus, computer device, and storage medium. It pertains to the field of intelligent connected vehicles and solves the problems of low efficiency and error-proneness when manually replacing video content. The method includes: acquiring masking information of a video to be processed, the masking information indicating a dynamic image region of a target object in the video to be processed; and replacing the target object with a reference image and integrating it into the video to be processed based on the dynamic image region indicated by the masking information. The technical solution provided by this disclosure is applicable to complex dynamic scenes and achieves efficient and accurate video content replacement.

This invention provides exosomes derived from rice, their preparation method, and applications. The exosomes have a bilayered membrane spherical structure with a particle size ranging from 20 to 1000 nm. These exosomes are obtained from rice callus tissue and possess high biocompatibility, stability, and sustainable mass production characteristics. Furthermore, experiments have demonstrated that these exosomes have anti-aging, cell regeneration and tissue repair promotion, and protective functions, and can also significantly improve cell absorption efficiency and the delivery efficiency of active ingredients such as peptides.

The invention relates to the technical field of piano playing intelligent analysis, in particular to a motion capture method and system, a storage medium and a program product, and the method comprises the steps: obtaining the motion data of a first key; when it is recognized that the first key is in a pressed state from the first moment t1 to the second moment t2 according to the motion data, multiple groups of first hand images of the object from the third moment t3 to the fourth moment t4 are correspondingly collected; identifying a first hand executing a pressing action or having a pressing trend according to the first hand image; identifying a first finger executing a pressing action or having a pressing trend in the first hand; identifying a second key associated with the first finger; and judging whether the second key is matched with the identifier of the first key, and if so, correspondingly generating a motion capture result between the first moment and the second moment. According to the motion capture method provided by the invention, the fingering data of the object can be accurately acquired and matched to generate a reliable motion capture result.

This utility model discloses a rapid sealing device for large-area underground roadway rescue in coal mines. It includes side columns vertically arranged along both sides of the roadway and a central column vertically arranged in the middle of the roadway. Both the side columns and the central column are telescopic supports, and jacks are installed at the bottom of each. A fixing strip of the same width is horizontally arranged at the top of the roadway, and fixing strips of the same height are vertically arranged on both sides of the roadway. It also includes an air barrier composed of multiple air barrier units connected by zippers along their longitudinal edges. The jacks are used to finely adjust the height of the telescopic supports from the bottom. The three fixing strips form a wooden sealing wall. The air barrier is fixed to the side columns, central column, and wooden sealing wall to achieve rapid sealing of the roadway. This device solves the problem that existing sealing technologies cannot meet the rapid sealing requirements of underground roadways.

The utility model discloses an electric water heater, including heating rod and gall bladder, gall bladder includes phase change gall bladder and water gall bladder, and heating rod sets up in water gall bladder, and phase change gall bladder has phase change material, and phase change gall bladder still includes the first heat exchanger who communicates with water gall bladder, and the electric water heater still includes the circulation pipeline who communicates water gall bladder and the first heat exchanger, and the circulation pipeline includes first circulation pipeline and second circulation pipeline, and first circulation pipeline has first water inlet and first water outlet, and first water inlet is located in water gall bladder, and first water outlet is located in phase change gall bladder, and second circulation pipeline has second water inlet and second water outlet, and second water inlet is located in phase change gall bladder, and second water outlet is located in water gall bladder, and the water in water gall bladder can circulate and flow between phase change gall bladder and water gall bladder through first circulation pipeline and second circulation pipeline. The electric water heater provided in the application embodiment can effectively improve the heat exchange efficiency of the heat storage stage, shorten the heat storage duration while simplifying the system, effectively reducing the overall cost and reducing the energy consumption.

This invention discloses an axial focusing system, a three-dimensional scanning device, and a scanning method based on an acousto-optic deflector, belonging to the field of laser-related technology. The axial focusing system based on an acousto-optic deflector introduces a defocusing amount that changes with the deflection angle of the acousto-optic deflector through a prism. When the deflection angle of the acousto-optic deflector changes, the propagation distance of the beam in the axial focusing system is altered, thereby changing the effective focal length of the equivalent lens. The axial displacement of the beam waist position of the emitted beam changes according to the defocusing amount. Therefore, by adjusting the driving frequency of the acousto-optic deflector, the deflection angle of the beam by the acousto-optic deflector can be adjusted, thus changing the defocusing amount of the axial focusing system and achieving dynamic and rapid axial focusing of the laser.

This application provides a conductive paste that, by introducing inexpensive metals such as nickel and aluminum into the paste, increases the proportion of conductive metals other than silver to a maximum of 50%, significantly reducing the amount of precious silver used, effectively controlling material costs, and alleviating cost pressures caused by soaring silver prices. By controlling the particle size distribution of conductive metals other than silver (D50 is 2-9μm, D100 < 30μm), the paste is ensured to have good permeability and formability during screen printing, without screen clogging or broken grid lines, forming complete and uniform fine grid lines, laying the foundation for high efficiency.

This invention discloses a rapid detection method and device for the coating state of milled asphalt pavement aggregate based on multispectral imaging, belonging to the field of road material testing technology. The device includes a sample carrying and transport module, a multispectral imaging module, and a data processing and control module. This invention acquires multispectral images of milled aggregate in the visible-near-infrared band under multi-light source conditions, and uses image classification algorithms to automatically and accurately identify and distinguish asphalt-coated areas from exposed aggregate areas, thereby calculating quantitative indicators such as asphalt coating rate and coating uniformity index. This invention effectively solves the problems of strong subjectivity and poor accuracy in traditional manual inspection, achieving an objective, rapid, and quantitative evaluation of the quality of milled aggregate.

The application provides a photovoltaic off-grid electrolysis hydrogen production energy scheduling control method and system, comprising: obtaining photovoltaic input power through a photovoltaic assembly; an energy scheduling management module controls a hydrogen production power source connected with an ALK electrolytic cell to work under constant current or constant power, and controls a hydrogen production power source connected with a PEM electrolytic cell to work under an MPPT mode; the energy scheduling management module sets multiple photovoltaic power intervals according to the photovoltaic input power; power distribution is performed for the ALK electrolytic cell and the PEM electrolytic cell according to the multiple photovoltaic power intervals, and photovoltaic fluctuation power is dynamically adjusted; by using the difference between the ALK electrolytic cell and the PEM electrolytic cell in dynamic response speed and cost, multiple types of electrolytic cells can be simultaneously used in a cooperative operation mode, the adaptability of the electrolytic cell to photovoltaic fluctuation output is improved, the differential utilization of the ALK electrolytic cell and the PEM electrolytic cell is realized, the energy efficiency is improved, the cost is controlled, and the economic benefit maximization is realized.

This invention relates to the field of testing and evaluation of autonomous driving systems, and more particularly to a method for evaluating the intelligence level of autonomous vehicles based on a large language model's subjective-objective mapping. This method addresses the shortcomings of traditional evaluation methods in terms of objectivity, efficiency, and nonlinear fitting capability. The method includes the following steps: converting autonomous driving interaction data into natural language descriptions; constructing a knowledge base for the autonomous driving domain and enhancing the large language model to improve its understanding of professional rules; using the enhanced large language model to quantitatively evaluate the interaction data across multiple dimensions (safety, comfort, efficiency, social interactivity, and impact on the traffic system); and employing a multilayer perceptron to construct a nonlinear mapping model from interaction data to intelligent scoring, achieving efficient and objective comprehensive evaluation. This invention effectively reduces reliance on human experts, improves the consistency and efficiency of evaluation, and is applicable to the comprehensive evaluation of the intelligence level of autonomous driving systems at different levels.

The application provides a data processing method of a laser radar, an electronic device and a storage medium. The method is applied to the technical field of laser radars. The laser radar comprises a transmitting unit and a receiving unit. One transmitting unit corresponds to N receiving units, and N is a natural number greater than 1. The method comprises the following steps: selecting echo signals of M receiving units, wherein M is less than or equal to N; and outputting detection information corresponding to a target object according to the echo signals of the M receiving units. The method is beneficial to reducing the process complexity of the laser radar and improving the detection accuracy and flexibility of the laser radar.

This invention discloses a servo welding torch electrode detection device, welding torch, robot, and method, including a mounting plate. Two parallel first guide rods are vertically arranged on the mounting plate. A first spring and a second spring are fitted onto each first guide rod. A connecting plate, fitted onto the two first guide rods, is placed between the first and second springs. Two parallel second guide rods are horizontally arranged on the connecting plate. A fixed plate and a movable plate are mounted on the two second guide rods, and a third spring is installed between the fixed plate and the movable plate. The third spring can drive the movable plate to move back and forth along the second guide rods. An electrode detection device is mounted on the movable plate, with a first sensor on the electrode detection device and a second sensor on the movable plate. A fixed third sensor is located below the movable plate to detect whether the movable plate has moved.

The utility model relates to the technical field of ball technology, and disclose a kind of ship navigation anti-collision device, including protective sleeve, the inside of protective sleeve is equipped with multiple annular air bags, the middle position of annular air bag is slidably connected with upper inserting rod and lower inserting rod, upper inserting rod and lower inserting rod structure are same, and upper inserting rod and lower inserting rod are symmetrically distributed with the center point of upper inserting rod and lower inserting rod butt joint surface as symmetry center, both ends of annular air bag are equipped with end plate, end plate is slidably connected with multiple fixed bolts, multiple fixed bolts are respectively with upper inserting rod and lower inserting rod thread connection.This kind of ship navigation anti-collision device, multiple annular air bag is sleeved in the outside of upper inserting rod and lower inserting rod, and annular air bag is fixed and limited by end plate and fixed bolt, finally, protective sleeve cage is fixed in the outside of annular air bag, so that even if individual annular air bag is damaged, leading to its airtightness is affected, also will not force the whole ball to be scrapped, avoid the waste of resources, it is favorable to the control of overall cost.

The utility model relates to an electromagnetic switch and storage box, including electromagnet subassembly and permanent magnet subassembly, electromagnet subassembly includes at least two in first direction sequential interval arrangement's magnetic core, wherein two adjacent magnetic core is first magnetic core and second magnetic core, and the first magnetic core and second magnetic core are wound with coil, and permanent magnet subassembly has at least first magnetic pole, second magnetic pole, third magnetic pole and fourth magnetic pole.

This utility model discloses a radiator mounting mechanism, comprising: a support positioning platform for positioning the radiator module and a snap-fit ​​assembly mechanism for installing snap-fit ​​rings. The snap-fit ​​assembly mechanism includes a first support frame, a lifting seat mounted on the first support frame and suspended above the support positioning platform, at least one base plate horizontally mounted on the lifting seat, a stacking plate vertically mounted on the lifting seat for stacking snap-fit ​​rings, a pusher plate slidably mounted on the base plate for pushing the snap-fit ​​rings at the lower end of the stacking plate, a first cylinder mounted at one end of the base plate for driving the pusher plate, and a second cylinder mounted on the first support frame for driving the lifting seat. The support positioning platform positions the radiator module below the snap-fit ​​assembly mechanism. The snap-fit ​​assembly mechanism descends and presses against the radiator module. Multiple first cylinders push the pusher plate to simultaneously snap multiple snap-fit ​​rings onto the radiator module, completing the assembly of the radiator module.

The application provides a bottom blowing gas supply mechanism for off-furnace refining, and relates to the technical field of steelmaking. The bottom blowing pipeline is connected with the bottom of a ladle; the argon gas supply pipeline is used for connecting an argon gas storage tank and the bottom blowing pipeline; the nitrogen gas supply pipeline is used for connecting a nitrogen gas storage tank and the bottom blowing pipeline; the nitrogen gas supply pipeline comprises a nitrogen gas total valve, a nitrogen gas flowmeter and a nitrogen gas flow regulating valve which are connected in sequence; the nitrogen gas flowmeter and the nitrogen gas flow regulating valve are associated; a first shunt valve is connected in series between the nitrogen gas total valve and the nitrogen gas flowmeter; a first bypass valve is connected in parallel with the nitrogen gas flowmeter; a second shunt valve is connected in parallel with the first shunt valve after the first shunt valve and the second shunt valve are connected in series with a first standard flowmeter. After the first shunt valve is closed, the second shunt valve and the first bypass valve are opened, the nitrogen gas flowmeter can be removed for offline calibration, inspection and maintenance, and the first standard flowmeter which remains can replace the nitrogen gas flowmeter to detect the nitrogen gas flow, so that the continuous supply of nitrogen gas is ensured.

The application provides a kind of RAG knowledge base retrieval threshold self-adapting dynamic optimization method and system thereof, comprising reading system basic configuration parameter, and based on parameter dynamic calculation maximum shard containing number;Load test question set, execute threshold step scanning to generate candidate threshold;For each candidate threshold, retrieve test question, record the original data of retrieval result under each candidate threshold;Statistical analysis is carried out on the retrieval result, and effective coverage rate and average result number are calculated;Apply constraint-based nonlinear scoring algorithm, combine effective coverage rate and average result number, and introduce load adaptability as penalty boundary, calculate the comprehensive score of each candidate threshold;According to the comprehensive score result, output the threshold with the highest score as the recommended parameter, and generate an analysis report containing the recommended reason.The application effectively controls the context noise and Token cost input to the large model while ensuring the retrieval recall rate, and realizes the automatic performance optimization of RAG system.

The application discloses a power special safety isolation fence for preventing mistaken entry into a live area, relates to the technical field of power protection isolation and smart grid, and is characterized in that a plurality of middle convex counter clamping plates are equidistantly arranged between two fixed support frames, a plurality of middle convex joint plates are equidistantly arranged between the two fixed support frames, a developing torsion spring is welded at the middle of one end of the plurality of middle convex counter clamping plates and the plurality of middle convex joint plates, joint torsion springs are welded at both sides of the one end of the plurality of middle convex counter clamping plates and the plurality of middle convex joint plates, and a multi-hole middle limiting plate is clamped at one end of the developing torsion spring. The fence is adjusted by itself, and a warning linkage is cooperated with an outward expansion component, so that the distance of protection is expanded without increasing the number of fences, the actual protection cost is reduced, a person who breaks in is warned by cooperating with a contact alarm component and an environment exploration component, and a background staff member is fed back in time, so that the mistaken entry into a live environment is avoided, and the actual isolation protection effect is improved.

This invention discloses a method and system for calculating the strength of surrounding rock based on the equivalent support reaction force of prestressed anchor bolts, relating to the field of surrounding rock data processing technology. The method includes: acquiring the initial mechanical parameters of the surrounding rock, tunnel excavation parameters, and anchor bolt support design parameters; calculating the cohesion increment, the elastic modulus of the anchor bolt-surround rock composite structure, and the equivalent support reaction force based on the design parameters; superimposing the cohesion increment with the initial cohesion of the surrounding rock to obtain the total cohesion; applying the equivalent support reaction force as a boundary condition to the bearing arch model; calculating the rock mass strength safety factor, the anchoring system efficiency coefficient, and the comprehensive deformation stability coefficient in parallel; and synthesizing the rock mass strength safety factor, the anchoring system efficiency coefficient, and the comprehensive deformation stability coefficient to obtain the final surrounding rock strength safety factor. This invention, through quantitative analysis, reduces the possibility of engineering risks and provides technical support for the special and complex engineering type of large-span tunnels.

This application relates to the field of synthesis, disclosing a method and equipment for preparing nitrate ions. The method includes: subjecting a first mixture containing a solid catalyst and a liquid substance to ultrasonic vibration or ball milling under contact with a nitrogen-containing gas to obtain a second mixture containing nitrate ions; filtering the second mixture to remove the solid catalyst to obtain a solution containing nitrate ions. This preparation method can be carried out at room temperature and pressure, greatly reducing energy consumption and achieving zero carbon emissions.

The present application relates to a kind of analytical methods for determining hydrogenation rate of hydrogenated nitrile, comprising the following steps: using high-field nuclear magnetic or low-field nuclear magnetic, hydrogenated nitrile sample containing solvent is tested, setting sampling parameter, acquisition one-dimensional nuclear magnetic resonance diffusion ordering spectrum spectrum diagram;Hydrogenated nitrile corresponding chemical shift and integral area information are obtained by one-dimensional nuclear magnetic resonance diffusion ordering spectrum spectrum diagram, combined with nitrile raw material component information, calculate hydrogenation rate;The nitrile raw material component information includes acrylonitrile content, 1,4-butadiene content, 1,2-butadiene content;Hydrogenated nitrile corresponding chemical shift and integral area information include saturated aliphatic hydrocarbon signal integral area, 1,4-butadiene CH=CH signal and 1,2-butadiene CH= signal integral area, 1,2-butadiene CH2= signal integral area.Compared with prior art, the present application is a kind of analytical methods for determining hydrogenation rate of hydrogenated nitrile containing solvent, which can be used in nitrile hydrogenation process, and hydrogenation rate is rapidly analyzed after hydrogenation reaction.