16results about How to "Applicability" patented technology

The invention provides a physical information long-short-term memory network site seismic response prediction method based on kinematics derivative constraint and data folding. The method comprises the following steps: collecting and preprocessing bedrock and ground surface seismic oscillation data; displacement, speed and acceleration supervision labels are constructed through surface acceleration integration; constructing a long-short-term memory network containing a data folding and unfolding module; physical constraint loss is constructed by utilizing kinematics derivative relations between displacement and speed and between speed and acceleration, and a network is trained by combining an adaptive weight strategy; and outputting earth surface displacement, speed and acceleration time history by adopting the trained network. According to the method, under the condition that constitutive parameters of a soil layer are not explicitly given, physical consistency constraint can be applied to the field seismic response prediction process, the long-time program train training burden is reduced through sequence folding processing, and the method is suitable for field seismic response prediction.

The utility model discloses a current transformer which comprises a transformer shell and a secondary wire holder, a coil is embedded in the transformer shell, the secondary wire holder comprises a mounting piece, a conducting strip embedded in the mounting piece, an O-shaped wire clip and a locking screw, a short joint is arranged on the conducting strip, and the O-shaped wire clip is arranged on the short joint. The conducting strip extends out of a connecting piece laterally, penetrates through the mounting piece and extends into the mutual inductor main body; the current transformer is used for high-voltage cable measurement, the main body structure of the current transformer is simple and practical, the primary and secondary wiring structure design is reasonable, the cable groove has various shapes, the measurement is more comprehensive, and the current transformer is suitable for measurement and use of various cable currents and other various data.

The application discloses a kind of based on graph neural network's magnetic field signal space-time decoding intelligent detection method, comprising the following steps: collecting magnetic field signal, pre-processing generates magnetic field signal time sequence;Extract magnetic field amplitude, direction and rate of change characteristic component, generate window observation state vector sequence;Generation space-time propagation constraint parameter set;Build dynamic heterogeneous space-time correlation graph;Calculate path level message, generate node path message set;Perform multi-channel aggregation, input improved MPNN to perform constrained message passing and node state update, generate space-time decoding state sequence;Calculate structure consistency index and constraint violation degree, generate space-time decoding discriminant;Generate counterexample trajectory and obtain minimum contradictory subgraph, generate magnetic field signal space-time decoding intelligent detection result.The application adopts the space-time decoding method of graph neural network, realizes the high robust detection and explainable positioning of magnetic field structure anomaly, with the advantages of high precision, strong adaptability.

The invention discloses a molded line design method and device for an air valve of an engine and the engine, and belongs to the technical field of air valves of engines. Based on the working condition and the parameter sensitivity of the engine, a molded line scheme of a plurality of air valves is generated through mixed horizontal orthogonal test design; performing preliminary screening of molded line schemes based on the surface pressure of the mapping conical surface of the air valve and finite element simulation analysis; based on a dynamic model of the valve mechanism, performing dynamic simulation evaluation and weighted comparison on the molded line scheme subjected to preliminary screening to obtain a molded line scheme subjected to secondary screening; and performing gas circulation performance simulation evaluation on the molded line scheme subjected to secondary screening to obtain a final molded line scheme. The engine gas valve is improved and optimized by comprehensively considering the strength, the wear resistance, the valve seat, the sealing performance and the gas circulation performance of the gas valve; therefore, a standardized and reusable forward development method is provided for the molded line design of the air valve, and the method has both theoretical preciseness and engineering applicability.

The application provides a bio-based material with antibacterial effect, which comprises a polymer represented by formula (1) or a mixture of the polymer represented by formula (1) and polyethylene glycol as an antibacterial active ingredient. The application also provides use of the bio-based material. The bio-based material with antibacterial effect provided by the application has excellent and stable antibacterial activity, has significant antibacterial effect on various bacteria and fungi, and has excellent biodegradability, biocompatibility and other performances, is a bio-based product prepared through microbial fermentation, is high in safety, and is suitable for industrial production and large-scale use.

The application relates to the field of packaging heat dissipation technology, and provides a three-dimensional integrated active heat dissipation structure, which comprises an upper cover plate layer, an air inlet hole is arranged on the upper cover plate layer; a fan and pump layer is arranged below the upper cover plate layer; at least one liquid cooling flow channel layer is arranged below the fan and pump layer; a high-power device layer is arranged below the at least one liquid cooling flow channel layer; at least one vapor chamber layer is arranged on at least one surface of the high-power device layer; at least one heat conduction material layer is arranged between the high-power device layer and the vapor chamber layer; and a lower cover plate layer is arranged at the bottom of the whole structure. The structure can be combined by selecting and matching the air cooling layer, the single and double liquid cooling layers and the vapor chamber layer according to different high, medium and low power devices, and three-dimensional integration and synergic coupling of the air cooling, liquid cooling and solid heat conduction structure are achieved, so that three-dimensional heat management is realized.

An epoxy resin-water glass composite grouting material is disclosed, comprising: epoxy resin, polyurethane prepolymer, hydrophobic nano-silica, silica powder, modified amine curing agent, water glass, calcium-based bentonite, and DMP-30 accelerator. The invention also includes a method for preparing the epoxy resin-water glass composite grouting material. This invention, through the synergistic effect of multiple components, significantly improves the degree of curing of the material, enhances the curing quality in water-rich environments, forms a stable reinforced structure, and solves the problem of underwater curing of epoxy materials. It exhibits high impact strength, strong material toughness, and a short gel time, reducing engineering costs by more than 40% while ensuring material performance.

The application discloses a multi-region power system event-triggered load frequency safety control method and system, and the technical scheme points are as follows: in view of the problem that the existing load frequency control method generally assumes that the communication link is continuously available and is difficult to maintain stable operation under the condition of DoS attack, the system is modeled as a switching system when the DoS attack exists, and the control mode is switched in real time according to whether the link is subjected to the DoS attack: the conventional learning control is executed to optimize the frequency regulation performance when the communication is normal; the anti-attack control mode is switched to when the attack occurs, so that the closed-loop stability can be maintained and the frequency deviation and the tie-line power fluctuation can be inhibited under the condition that the communication is blocked, and the system safety is significantly improved; in addition, based on the RL method, the control strategy is obtained by online learning through interaction with the environment under the condition that the system model is unknown or the parameters are uncertain, so that the control energy minimization and the operation economy are realized without depending on the accurate system dynamics.

The invention belongs to the technical field of biology, and relates to a colorimetric probe for detecting myoglobin and a detection method. The colorimetric probe comprises a reagent A and a reagent B: a solution containing iodide ions; the preparation method of the reagent A comprises the following steps: adding a reducing agent into a solution containing a copper salt and a coordination stabilizer, stirring, adding a water-soluble gold salt or gold acid when the solution turns from red to green, and continuously stirring for 1-100 minutes to obtain a copper-gold nanoparticle solution; the thioacetamide is subjected to a hydrolysis reaction in an acid solution to generate hydrogen sulfide, then the copper-gold nanoparticle solution obtained in the step S1 is added for a reaction, and a hydrogen sulfide modified copper-gold nanoparticle solution is obtained. Through a coupling mechanism of acidic H2S in-situ release-Au-S bond binding-I-etching, nanomole-level, high-selectivity and label-free colorimetric detection of myoglobin is realized, and the method has sensitivity, reliability, economical efficiency and field applicability, and can be widely applied to rapid screening.

The application discloses a kind of self-repairing material for underwater flow field sensing and its preparation method and application, belong to underwater sensing and intelligent material technical field.The application utilizes the self-repairing characteristics of PBS and the inherent conductivity of carbon nanotube and graphene, and prepares self-repairing self-pleated microstructure underwater flow field sensing surface by spraying-rolling method.When the surface is damaged, the continuity of PBS matrix is destroyed and accompanied by the fracture of local conductive network.In water environment or humid environment, water molecules can promote the reversible exchange and rearrangement of dynamic borate ester bond in PBS, so that the polymer chain segments at the fracture interface are reconnected and the network structure is restored, thereby accelerating the crack closure process.Meanwhile, the conductive channel composed of MWCNT / GNP gradually restores the conductivity and flow field response signal, so that the surface re-forms stable microtexture morphology, thereby realizing the continuous sensing and long-term service of flow field disturbance in underwater environment.

The invention provides a mechanism deep learning dual-drive flow-slip disaster numerical simulation system, and relates to the technical field of geological disaster numerical simulation. The system integrates a physical mechanism model and a deep learning method. Based on a high-resolution DEM (Digital Elevation Model), by introducing a rock-soil type self-adaptive substrate entrainment mechanism, utilizing a shallow water wave equation to accurately calculate the terrain elevation, the flow direction, the flow velocity and the accumulation thickness of the first two time steps; and then taking the obtained multivariable field as four-channel input, and driving a CNN-GRU coupling network to perform rolling prediction. According to the method, the final accumulation form, the influence range and the dynamic evolution process can be quickly obtained only through a small amount of initial mechanism calculation, the simulation efficiency is remarkably improved on the premise of ensuring physical rationality, and the defects that a traditional pure mechanism model is long in calculation time consumption and a pure data driving model is physically distorted are overcome; the method is suitable for rapid risk assessment and emergency decision support of flow slip disasters such as landslide and debris flow.

The application discloses a kind of thin-walled piece processing methods without rigid connection, belong to machining technical field, to solve the problem of traditional rigid clamping plastic deformation in the processing of aero-engine stator ring class and other thin-walled deformable parts, the method comprises: according to the structure of thin-walled piece design special perfusion fixture and equip with adaptive lathe tool clamps;If the part with blade is bound with cotton rope blade, then mix yellow wax and white wax in proportion and heat melting;The part is put into perfusion fixture, and perfusion molten wax is cooled to realize no rigid connection;Replace the fixture parts and fix with lathe tool clamp, control the machining allowance to complete machining;Finally, heat the molten wax, and take out the piece by removing the rope.The application is simple to operate, can effectively control the deformation of part processing and free state, adapt to a variety of thin-walled ring parts processing, practicality and applicability is strong, can be widely used in the high-precision machining of thin-walled parts in aviation field.

The application provides a low-voltage large-current battery charging method and system based on a hybrid control full-bridge architecture, and relates to the technical field of power electronics. The method comprises the following steps: determining a load index representing a charging load state; in response to the load index satisfying a mode switching condition, establishing a state mapping relationship between a current control mode and a target control mode of a full-bridge power conversion unit, wherein one of the current control mode and the target control mode is a PWM control mode, and the other is a second control mode for output control by adjusting a switching frequency and / or a bridge arm phase difference; based on the state mapping relationship, converting a current control state in the current control mode into a starting control boundary corresponding to the target control mode, and controlling the full-bridge power conversion unit to switch to the target control mode. The scheme is beneficial to improving the state mismatch problem during switching of different control modes in a low-voltage large-current charging scene, and improving the cross-condition operation stability.

The utility model discloses a flood control detection early warning device which comprises a base and a top plate, a measuring assembly is installed on the base, the measuring assembly comprises a measuring cylinder and scale marks, a floating assembly is arranged on the inner side of the measuring cylinder, the floating assembly comprises a floating block and a roller, an observation assembly is installed on the inner side of the measuring cylinder, and the observation assembly is connected with the top plate. The observation assembly comprises a camera and an observation port, the measuring cylinder is provided with an early warning assembly, the early warning assembly comprises a movable plate and a button, and the top plate is provided with a lifting assembly. According to the flood prevention detection early warning device, waves on the water surface cannot be conducted to the inner side of the measuring cylinder, and the stability of vertical movement of the floating block is guaranteed; the water level detection accuracy is guaranteed, then the reliability of early warning work can be guaranteed, the early warning value of the water level depth can be conveniently and rapidly adjusted according to the condition of an embankment, the adaptability of early warning and monitoring work of a water body is improved, the safety of early warning and detection of the water body is improved, and the method is suitable for detection and early warning of the water level of the water body.

The application discloses a gas shield solid wire rod and welding wire for improving full-position welding arc stability, which contains Fe and inevitable impurity elements, and the following chemical elements with mass percentage: C: 0.05-0.12%; Si: 0.7-1.4%; Mn: 1.0-1.9%; S: 0.008-0.02%; Ti: 0.08-0.19%; Al: 0.01-0.08%; Zr: 0.01-0.06%; Ni: 0.1-0.8%; Mo: 0.09-0.25%; Y: 0.02-0.07%; O: 0.003-0.008%. The welding wire can realize uniform distribution and spreading of the bead surface layer slag to both sides of the weld and self-stripping after welding, and avoids the problem of arc instability caused by a large amount of slag gathering in the center of the weld.