574 results about "Extreme temperature" patented technology

The invention discloses an LSTM-COF-based power equipment data anomaly detection method and system, and relates to the technical field of power equipment state monitoring, and the method comprises the following steps: collecting historical data, and constructing a three-dimensional data matrix; predicting equipment parameters at the extreme temperature through an LSTM model; compressing the features, quantifying the covariance deviation degree between the features in combination with a correlation abnormal factor algorithm, and detecting abnormal points; the system integrates a data collection module, a data preprocessing module, a data prediction module, a detection model generation module and a visualization module. According to the method, the multi-dimensional historical operation data of the power equipment is collected, the equipment parameters in the extreme temperature environment are predicted by using the LSTM model, the principal component analysis dimensionality reduction and correlation abnormal factor algorithms are combined, insulation degradation type and electrical connection type faults can be dynamically identified, the data distribution change is adapted through the incremental learning mechanism, and the fault diagnosis accuracy is improved. The problems of low high-dimensional data processing efficiency and poor anomaly detection adaptability due to manual experience dependence in a traditional method are solved.

A system, method, and process for direct, precise measurement of extension / strain of a metallic round or flat tensile specimen or measurement of crack growth rates on a metallic CT specimen under control forces of extreme temperature, pressure and adverse environment are applied to a pre-crack metallic specimen within an autoclave.

The invention discloses an electronic function test system of a high-voltage PTC (Positive Temperature Coefficient) electric heater, which relates to the technical field of PTC electric heaters and is characterized in that extreme temperature, humidity and voltage disturbance data are acquired in a programmable multi-dimensional environment simulation cabin, and the temperature deviation of the high-voltage PTC electric heater is predicted by using a multi-channel fusion and compensation model; according to the method, the high-voltage PTC electric heater is used as a power source, the output power is adjusted in a real-time feedforward and feedback mode in the self-adaptive controller, finally, through dynamic calibration and closed-loop verification, a model and gain parameters are optimized in multiple scenes, a complete system which can deal with large environmental changes and is high in temperature control precision is formed, the stability and safety of the high-voltage PTC electric heater under the severe working condition are remarkably improved, and the high-voltage PTC electric heater is suitable for being used in the field of electric heaters. And overshoot and lag are reduced, the energy utilization efficiency is improved, the system is suitable for industrial heating, vehicle warm air and other scenes needing high reliability and quick response, and the maintenance cost can be effectively reduced.

The invention relates to the technical field of high polymer material chemistry, and discloses a high and low temperature resistant anti-yellowing optical adhesive and a preparation process thereof, the high and low temperature resistant anti-yellowing optical adhesive comprises the following components by weight: 40-60% of modified organic silicon resin, 20-30% of urethane acrylate, 10-15% of alicyclic epoxy resin, 0.5-5% of a nano inorganic filler, 0.8-2.5% of an anti-yellowing composite reagent, and the balance of a solvent. The coating is prepared from the following components in percentage by weight: 0.5 to 1.5 percent of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 0.1 to 0.3 percent of fluorine modified polyacrylate flatting agent and 0.3 to 1.0 percent of chloroplatinic acid-divinyl tetramethyl disiloxane complex catalyst. The preparation method comprises the following steps: mixing alpha, omega-dihydroxy polydimethylsiloxane and phenyltrimethoxysilane according to a mass ratio of 8: 2-7: 3, adding 0.3-1.0% of a chloroplatinic acid-divinyl tetramethyl disiloxane complex catalyst, and raising the temperature by stages under the protection of nitrogen, so that the glass transition temperature of the adhesive can reach 120 DEG C below zero and 125 DEG C, and the temperature of the adhesive can reach 120 DEG C below zero and 125 DEG C below zero. And the long-term service requirement of the optical device in an extreme temperature environment is met.

The invention relates to the technical field of protective glue, in particular to extreme high and low temperature impact resistant UV (ultraviolet) photocuring electronic protective glue which is prepared from the following raw materials in parts by weight: 30-50 parts of synergistically modified epoxy-urethane acrylate oligomer, 20-35 parts of composite active monomer, 1.5-5 parts of composite photoinitiator and 10-20 parts of core-shell structure inorganic composite filler, 0.6 to 2.2 parts of a silane coupling agent, 0.12 to 1.1 parts of an antioxidant and 0.11 to 1 part of a leveling agent; the preparation method of the synergistically modified epoxy-urethane acrylate oligomer comprises the following steps: reacting resin acid modified epoxy resin with phosphoric acid di (hydroxyethyl acrylate) ester at 80-90 DEG C, and introducing a phosphate group to obtain a phosphate modified epoxy acrylate intermediate; the protection glue unifies rigidity, flexibility and flame retardance on the molecular level through the cooperation of the hybrid oligomer and the core-shell filler, realizes high heat conductivity, strong adhesion and extremely low internal stress, and has extreme temperature impact resistance, long-term damp-heat aging resistance and high-reliability protection performance.

The invention discloses a multifunctional geotechnical mechanical testing system for controlling temperature, humidity and salinity in an extreme environment, and relates to the technical field of ocean geotechnical engineering and geotechnical engineering. The system integrates a high-precision temperature and humidity and salinity control system, can accurately simulate the influence of complex environments such as extreme temperature and humidity, salt spray corrosion and the like on the mechanical properties of geotechnical materials, supports a direct shear test, a pull-out test, a soil body single-particle crushing test and a geosynthetic material stretching and puncturing test, can distinguish static, dynamic and long-term creep test modes, and can be used for testing the mechanical properties of the geotechnical materials. Comprising creep mechanical property testing under cyclic direct shear and continuous load. A visual monitoring assembly is additionally arranged, so that the microscopic deformation and damage process of the sample can be recorded in real time. Through multifunctional integration, temperature, humidity and salinity joint control, visual monitoring and dynamic and static coupling test devices, the technical bottlenecks of single function, environment simulation limitation and microcosmic observation deficiency of traditional equipment are solved, and high engineering application value and popularization potential are achieved.

The invention discloses an AI-based variable frequency heat pump control method and a control system thereof. The method comprises the following steps: S1, data acquisition; s2, data preprocessing; heat demand load prediction and operation parameter dynamic optimization are achieved through the AI model, the response speed of the environment temperature and heat demand changes is effectively increased, the parameter matching precision is effectively improved, the problems that traditional control response is lagged, and adaptability is poor are effectively solved, and the control accuracy is improved. The energy consumption of the system can be reduced under complex working conditions such as extreme temperature and sudden load change through a reinforcement learning algorithm, and the self-adaptive energy-saving capability of a multi-element scene is remarkably improved; meanwhile, based on a fault diagnosis scheme of a CNN and Transform fusion model, the fault diagnosis accuracy is effectively improved, the false alarm rate is effectively reduced, the defects of traditional threshold judgment are overcome, and in addition, the method can adapt to working condition changes and equipment aging characteristics for a long time in cooperation with model self-learning and parameter online updating functions.

The invention discloses a football high and low temperature aging detection device, and relates to the technical field of football detection, the football high and low temperature aging detection device comprises a bottom plate, the upper side of the bottom plate is fixedly connected with a detection box body and a fixing frame, the upper side of the bottom plate is provided with a detection unit, and the detection unit is used for simulating an impact and extreme temperature composite environment. A base is fixedly connected to the middle of the upper side of the bottom plate, a football body is arranged on the upper side of the base, a hydraulic cylinder is fixedly connected to the upper side of the fixing frame, and a pressing plate is fixedly connected to the output end of the lower side of the hydraulic cylinder. According to the football high and low temperature aging detection device, through cooperation of the bottom plate, the detection box body, the base and the pressing plate, a football can be stably limited, through linkage of a sliding hole, a movable plate, a connecting rod, impact blocks and a cam, the impact blocks on the left side and the right side are driven by a motor to repeatedly impact the football, and composite environment simulation of the impact effect and the extreme temperature is achieved; the detection condition is closer to the actual football use scene, and the authenticity of the detection result is improved.

The invention discloses a low-temperature-resistant bending-resistant cable for new energy, relates to the technical field of cables, and solves the problem of short service life of a cable caused by poor protection performance and durability of the cable for new energy in the prior art. Comprising an inner core structure, the inner core structure comprises a conductor layer, the conductor layer is composed of a plurality of conductors distributed in an array, and each conductor is wrapped by an insulating layer; the cable is characterized in that the outer part of the inner core structure is wrapped with a wrapping shielding layer; the outer sheath wraps the wrapping shielding layer, the outer sheath comprises a low-temperature-resistant layer, a buffer layer, a supporting layer and a reinforcing layer, the low-temperature-resistant layer wraps the lining layer, the buffer layer wraps the low-temperature-resistant layer, and the supporting layer wraps the buffer layer and is located on the inner side of the reinforcing layer; the cable is kept stable at extreme temperature, stress damage can be reduced, the cable is not hardened at low temperature and can be tightly attached to form sealing, and moisture resistance is improved.

The invention discloses a gallium oxide solar-blind ultraviolet detector based on selective area etching and a preparation method thereof, and belongs to the technical field of semiconductor photoelectric detection. Comprises from bottom to top: a substrate; the first epitaxial layer is located on the substrate, and the first epitaxial layer is a highly doped n-Ga2O3 layer; the second epitaxial layer is located on the first epitaxial layer, and the second epitaxial layer is a lightly doped n-Ga2O3 layer; the third epitaxial layer is located on the second epitaxial layer, the third epitaxial layer is a highly-doped p-NiO layer, and the third epitaxial layer is distributed at intervals through selective area etching; and the first ohmic contact layer is located on the area where the third epitaxial layer is distributed at intervals. The detector adopts a PN junction structure working in a reverse bias state, and compared with a Schottky structure, the detector has the advantages that the built-in electric field intensity and the leakage current level of a device are less affected by high-energy photon irradiation and working environment temperature change, and the anti-irradiation performance of the device and the working capability under an extreme temperature condition are effectively improved.

The invention relates to the technical field of sealing rings, and discloses a wide-temperature-zone sealing ring which comprises a sealing ring body, the sealing ring body comprises a sealing layer, a thin film layer and a compensation layer, the outer portion of the thin film layer is arranged in the sealing layer, and the outer portion of the compensation layer is arranged in the thin film layer; the sealing layer and the thin film layer are supported by different materials and are made of fully-sealed elastic flexible materials, and the thickness of the thin film layer is smaller than that of the sealing layer; the compensation layer and the sealing layer are supported by different materials, and the linear expansion of the materials of the compensation layer and the sealing layer is opposite; the thickness of the compensation layer is inversely proportional to the thickness of the sealing layer according to the linear expansion coefficients of the two materials. The materials of the sealing layer and the compensation layer are selected, so that the compensation layer expands at low temperature to offset lost sealing pressure, the compensation layer shrinks at high temperature to buffer excessive extrusion, uniform contact stress of the sealing ring is maintained in extreme temperature fluctuation, and the effect of zero-damage self-adaptive sealing in the whole temperature range is achieved.

The invention discloses wide-temperature-range self-repairing gradient ceramic fire extinguishing foam, a preparation method and application of the foam in an electrochemical energy storage device, and belongs to the technical field of new energy battery safety. Aiming at the technical bottleneck of a traditional fire extinguishing material in coping with a thermal runaway fire disaster of an electrochemical energy storage device, the defects of an existing material in the aspects of extreme temperature adaptability, electrolyte compatibility and long-acting flame retardance are overcome through unique three-layer gradient structure design and material innovation; the technical bottlenecks of wide temperature range stability, an intelligent response mechanism and after-combustion blocking capacity are broken through, the ultra-wide temperature range structural stability from-50 DEG C to 1600 DEG C is achieved, millisecond-level response to different electrolytes is achieved, and a self-repairing barrier after fire extinguishment can be built. The innovation point is that the gradient ceramic structure design, the dynamic response mechanism and the self-repairing circulating system are adopted, so that the equal-depth fire reignition rate of the lithium battery can be obviously reduced, and the application prospect is wide.

The invention relates to the technical field of spaceflight sealing, in particular to a multi-mode pressure sealing device and method for heating and extracting extraterrestrial star soil gas. The device comprises a transposition sealing disc, a positioning base disc and a distributed driving actuator, a flow guide funnel is arranged on the outer side of the transposition sealing disc, and a sample receiving station and a sealing station are arranged on the inner side of the transposition sealing disc; an interface cylinder is arranged on the outer side of the positioning base disc, and a sample receiving station hole is formed in the inner side of the positioning base disc; the distributed driving actuator is connected with the transposition sealing disc and the positioning base disc and used for driving the transposition sealing disc to conduct axial rising, station switching and axial sealing relative to the positioning base disc in a time-sharing mode. The problem of dynamic sealing failure under the extreme temperature difference and high particle invasion environment can be effectively solved, zero-leakage collection of star soil heating gas is achieved, the reliability and operation efficiency of gas sample collection in a deep space exploration task are remarkably improved, and mechanical interference or positioning deviation caused by compound motion of a traditional linkage mechanism is also avoided.

The invention discloses an intelligent memory chip high and low temperature test device and a test tuning method, and relates to the technical field of memory chip testing, the device comprises a test unit used for constructing a cold and hot test environment for a to-be-tested memory chip; the power supply unit is used for providing direct current for each unit; the management unit is used for detecting environment data in real time and uploading the environment data to the data acquisition and analysis server, and regulating and controlling the environment data in a closed-loop manner by combining a test instruction; the excitation generator is used for generating and sending test excitation for the to-be-tested storage chip according to the test instruction, recording test data and feeding back the test data to the data acquisition and analysis server; and the data acquisition and analysis server is used for pre-judging faults of the to-be-tested storage chip based on an AI model according to the real-time environment data and the test data, optimizing test instruction parameters or storage chip FTL algorithm parameters, generating a dynamic regulation and control test instruction and issuing the dynamic regulation and control test instruction. According to the invention, accurate test and optimization of the memory chip in an extreme temperature environment can be realized.

The invention relates to a sealing rubber ring, and belongs to the technical field of sealing materials. The problems that a traditional sealing rubber ring is narrow in temperature resistance range, poor in medium corrosion resistance, unbalanced in mechanics and elasticity, short in anti-aging service life and prone to precipitation and pollution are solved. The material is composed of a base material, a composite anti-precipitation filler and auxiliary components, the base material contains four components including modified fluororubber and the like, the composite anti-precipitation filler contains modified nano calcium carbonate and the like, and the auxiliary components contain vulcanizing systems, reinforcing systems and the like. The modified fluororubber is prepared by a specific process. The preparation method comprises the following steps: banburying, standing, vulcanizing, cooling and removing flash. The rubber ring has the advantages of wide temperature-resistant range, medium corrosion resistance, aging resistance, balanced mechanical properties and no precipitation pollution, and is suitable for industrial scenes with extreme temperature difference, strong corrosion and the like.

The invention relates to a wide-temperature-range stable dual-band infrared optical filter for an extreme environment and a preparation method thereof. The wide-temperature-range stable dual-band infrared optical filter comprises a front film system, a substrate and a back film system, the front film system and the back film system are formed by alternately overlapping germanium layers and zinc sulfide film layers; the drift distance of the central wavelength of the passband of the infrared optical filter is less than 0.05% within the temperature range of-120 DEG C to + 85 DEG C. According to the invention, the internal stress of the film layer is obviously reduced through the optimized film system design, so that the excellent stability of the optical performance in an extreme temperature environment is realized, the technical problem that some special infrared spectrum detection systems work in a wide temperature range is solved, and a reliable solution is provided for high-end aerospace infrared application.

The embodiment of the invention discloses a chip temperature control method, device and equipment and a medium, and relates to the technical field of chip testing. The method comprises the following steps: acquiring a temperature fluctuation standard deviation and an error change rate of a to-be-tested chip based on an acquired temperature of the to-be-tested chip; matching a target weighting coefficient combination in a preset fuzzy rule base according to the temperature fluctuation standard deviation and the error change rate; determining a dynamic PID control parameter based on the target weighting coefficient combination and a preset basic PID parameter; and adjusting the power output of the temperature control module by adopting a preset PID control algorithm according to the dynamic PID control parameters so as to control the temperature of the chip. According to the invention, under the condition that only local heating or cooling is carried out on the chip, severe temperature fluctuation of the chip caused by dynamic load change can be effectively handled, and rapid, stable and high-precision control of the chip temperature is realized, so that strict requirements of extreme temperature testing are met.

The invention provides a machine room space energy consumption prediction method and system based on a long and short term memory network, and the method comprises the following steps: (a) constructing a three-dimensional digital twin model of a target machine room, and generating time sequence simulation data based on computational fluid dynamics (CFD) simulation; (b) preprocessing the time sequence simulation data; (c) constructing and training a long-short term memory (LSTM) network model; (d) operating parameters based on the current machine room; and (e) displaying the energy-saving operation suggestion and the operation state of the machine room in real time through a visual interface to assist an administrator to make a decision. According to the method, the computer room three-dimensional model is constructed by utilizing the digital twinning technology, time sequence data covering normal and abnormal working conditions (such as air conditioner faults and extreme temperatures) is generated in combination with CFD simulation, the problem of model overfitting caused by insufficient real data in a traditional method is solved, the training sample range is expanded through simulation data, and the training efficiency is improved. The adaptive capacity of the LSTM model to a complex scene is enhanced, and the generalization of a prediction result and the robustness of a system are improved.

A temporary shade structure system includes a weather and UV radiation resistant shade sail, at least three connection poles suitable for the installation environment, and weather and UV radiation resistant ropes or lines. The shade sail is connected to the poles using the ropes or lines. The system is adjustable to accommodate changes in sun location and wind direction. The system is designed to withstand different environmental conditions such as high winds, heavy rains, or extreme temperatures. A method for erecting the shade structure over a dock or deck is also disclosed, which involves identifying suitable structures for attaching the shade sail system, measuring the area for the sail, ordering the sail based on the measurements, and installing and adjusting the sail.

The invention belongs to the technical field of batteries, and relates to a composite phase change electrolyte and a preparation method and application thereof. The composite phase-change electrolyte comprises a lithium salt, a solvent, a cross-linking agent and inorganic nanoparticles, and the cross-linking agent is one or more of a polysiloxane derivative and a polyfunctional group acrylate derivative. According to the composite phase change electrolyte provided by the invention, relatively high ionic conductivity is provided, the ion diffusion resistance is reduced, and the electrolyte is always kept in a liquid state within a conventional temperature range; when the battery reaches the phase change temperature, the electrolyte is changed from liquid to solid, an ion path is blocked, and the safety protection of the battery at high temperature is realized; in addition, the battery using the composite phase change electrolyte has a relatively long cycle life at a room temperature and in a working environment of-30 DEG C. The composite phase-change electrolyte is suitable for a high-safety lithium ion battery, and is especially suitable for application scenes of extreme temperature conditions, such as high-temperature thermal runaway protection and low-temperature performance protection.

The invention discloses a quick-hardening early-strength concrete mineral additive and a preparation method thereof, and belongs to the technical field of building materials. The additive comprises the following components in parts by weight: 50-75 parts of a mineral active material (compounded by silica fume, slag powder and metakaolin), 15-30 parts of a composite activator (sodium silicate, lithium sulfate and triethanolamine synergistically), 5-10 parts of a sustained-release microcapsule (calcium sulphoaluminate coated with nano-silica) and 2-5 parts of an auxiliary thickening agent (compounded by HPMC and a water reducing agent). The preparation method comprises the steps of mineral activation, excitant reaction and mixing of the microcapsule and the thickening agent. After the additive is doped into concrete, the 3h compressive strength is greater than or equal to 15MPa, the initial setting time is less than or equal to 5min, and the additive has low resilience (less than or equal to 13%), high durability (impermeability is greater than or equal to P11) and environmental adaptability (-5 DEG C strength fluctuation ratio is less than or equal to 9%). And compared with the prior art, the cost is reduced by 40%, and the method has remarkable economic and social benefits.

The invention relates to the technical field of battery management, and discloses a sodium ion battery with a function of preventing temperature from being out of control, the battery is arranged in a battery shell, a plurality of first temperature sensors are arranged on the battery to collect sodium ion battery temperature data, and the first temperature sensors and the battery are connected with a controller; the controller is further connected with a voltage sensor and a current sensor which are used for detecting electrical parameters. The temperature control method in the controller comprises the following steps: setting an acquisition time point to obtain sodium electricity temperature data, calculating a sodium electricity temperature value, and limiting output power according to the temperature value; setting an acquisition time period to obtain multiple groups of temperature and electricity data, generating a change speed and trend curve of temperature and total power, calculating a curve matching value and a temperature power matching value, and if the matching value exceeds a reference range, performing early warning. Accurate temperature control and out-of-control early warning of the sodium-ion battery are achieved, performance degradation at the extreme temperature is reduced, use safety is guaranteed, and the method is suitable for scenes such as energy storage and electric equipment.

The invention relates to the technical field of engine heat exchangers, in particular to a high-speed engine precooling heat exchanger which comprises a plurality of first cooling units, a plurality of second cooling units and a plurality of air circulation units, each first cooling unit is of a regular hexagon structure, and cooling liquid can circulate in each first cooling unit; the second cooling unit is of a regular hexagon structure, and cooling liquid can circulate in the second cooling unit. The air circulation unit is of a regular hexagon structure, and air can circulate in the air circulation unit. The first cooling unit, the air circulation unit and the second cooling unit are stacked layer by layer, the two sides of the air circulation unit are adjacent to the first cooling unit and the second cooling unit respectively, and the whole high-speed engine precooling heat exchanger is of a hexagonal prism structure. Through the hexagonal geometric symmetry design, the thermal stress in the heat exchanger is effectively reduced, and the reliability and safety of the heat exchanger in the extreme temperature difference environment are improved.

The invention provides a deep space exploration simulation test system and method.The deep space exploration simulation test system comprises a thermal interface structure, a cryogenic subsystem and a heating structure, the cryogenic subsystem can refrigerate and cool the thermal interface structure, and the heating structure can heat the thermal interface structure; the deep cooling subsystem comprises a low-temperature refrigeration assembly and a gas cooling assembly, the low-temperature refrigeration assembly transmits cold energy to the thermal interface structure in a one-way mode, and the gas cooling assembly cools the thermal interface structure through cooling gas. The continuous temperature regulation in the range of 300K to 423K is realized through the combination of air cooling and electric heating, and the continuous temperature regulation in the range of 38K to 300K is realized through the combination of a G-M low-temperature refrigerator and electric heating; compared with the existing space environment simulation equipment, the temperature zone can be expanded to 38K to 423K, and the extreme temperature zone environment required by deep space exploration including the lunar surface polar zone and the Mars can be completed; meanwhile, the integrated heat exchange cryogenic subsystem based on heat conduction and convection is compact in structure, liquid nitrogen and liquid helium do not need to be used, and energy conservation and environmental protection are achieved.

The invention discloses a composite coating diaphragm and a preparation method thereof and a secondary battery, the composite coating diaphragm comprises a base membrane and a composite functional coating compounded on the surface of the base membrane, the composite functional coating comprises a first functional coating relatively close to the base membrane and a second functional coating relatively far away from the base membrane, the porosity of the first functional coating is smaller than that of the second functional coating, and the raw material components of the first functional coating comprise modified nanocellulose obtained by double-grafting cis-1, 4-polybutadiene and polyethylene glycol chain segments and gas-phase aluminum oxide. By constructing a diaphragm coating with a gradient pore structure and combining an advanced material modification technology, the composite coating diaphragm integrates high thermal stability, excellent electrolyte wettability and low-temperature adaptability, and can still keep stable structure and interface characteristics under an extreme temperature working condition; therefore, the method has good expandability and industrial application prospects, and is suitable for development and application requirements of high-performance lithium ion batteries and next-generation energy storage devices.

The invention discloses an automobile part accelerated life test method and system, and the method comprises the steps: setting an extreme temperature cycle: setting a cycle of keeping a low temperature of-40 DEG C for 30 minutes and keeping a high temperature of 180 DEG C for 30 minutes, and setting a temperature change rate of 15 DEG C / min; a multi-physics field coupling test: in an extreme temperature cycle process, synchronously carrying out a resistance test, a withstand voltage test, a turn-to-turn insulation test, a vibration test, a humidity test and a salt spray test, and comprehensively evaluating the electrical, mechanical and environmental adaptability of the parts; multi-scale numerical simulation: establishing material-level, part-level and system-level coupling models, and predicting life distribution of parts; and data-driven optimization: based on historical test data and a numerical simulation result, establishing an acceleration model, dynamically adjusting a temperature cycle parameter and a stress level, and realizing maximization of test efficiency. Based on extreme temperature circulation (-40 DEG C / 30 minutes to 180 DEG C / 30 minutes) and multi-physical field coupling strengthening stress testing, the test time is shortened by 70% or above, and the evaluation error is smaller than or equal to + / -5%.

The invention discloses an intelligent regional refrigeration adjusting system and method based on multi-mode sensing, relates to the technical field of refrigerated cabinets, and aims to solve the problem that a traditional refrigeration device only conducts passive adjustment through pressure and temperature and cannot sense material decay in the early stage. The system comprises a pressure / temperature acquisition module, a state sensing module (a color recognition unit and a smell recognition unit), a grading decision module and a cold supply adjusting module, and material states are divided into L0-L3 four levels; according to the method, multi-modal data are synchronously obtained through a depolarization method, color / smell change indexes are obtained after processing, state grades are judged, customized cold supply instructions (such as L1 cooling and wind speed increasing and L3 limit refrigeration and isolation) and early warning instructions are generated in combination with pressure and temperature, and the instructions are independent in different areas.

The invention provides a large-scale transformer area short-term load prediction method, and the method comprises the steps: dividing transformer areas into temperature sensitive transformer areas and temperature inert transformer areas based on the historical data of each transformer area, constructing a dynamic temperature feature cumulative effect correction model for the temperature sensitive transformer areas according to the fluctuation rule difference of load and temperature features, and carrying out the prediction of the short-term load of each transformer area. According to the method, the temperature data is corrected, and the short-term load of the transformer area is predicted by using the model based on the characteristics corresponding to the modified temperature data, so that the influence of the extreme temperature on the load prediction can be eliminated or reduced, and the load prediction precision is improved. In addition, a transformer area short-term load prediction model in which the incremental learning method and the iTransform are combined is constructed, so that the load prediction efficiency can be effectively improved.

The invention discloses an energy management method and device for an LED street lamp photovoltaic energy storage system, and the method comprises the steps: obtaining the output characteristic data and environment illumination data of a photovoltaic module of the energy storage system, and carrying out the energy conversion optimization, and obtaining the electric energy information; acquiring a charge state of a first energy storage unit of the energy storage system based on the electric energy information, executing three-stage electric energy storage to obtain a current energy storage state, and activating a second energy storage unit of the energy storage system; according to the current energy storage state and the environment illumination data, the power supply proportion of the first energy storage unit and the second energy storage unit is dynamically allocated, and an LED street lamp illumination instruction is generated; and through the LED street lamp illumination instruction, monitoring a power supply loop in real time, carrying out energy supply cooperative matching, and outputting a system protection instruction. The dynamic stability problem of the system under the complex working condition can be solved, and the operation reliability of the system under the continuous cloudy and rainy or extreme temperature condition is improved.

The invention discloses a single-power-supply ultra-wideband temperature compensation low-noise amplifier circuit, and belongs to the technical field of radio frequency microwaves. The circuit is mainly composed of a pre-stage low-noise amplifier module, an inter-stage temperature compensation equalization module and a post-stage driving amplifier module. The temperature compensation equalizer module generates differential voltage related to temperature through a three-stage gallium arsenide diode temperature sensing unit, outputs a control signal through an enhanced FET differential amplification circuit, drives a voltage-controlled attenuation equalizer to dynamically adjust the attenuation amount of a radio frequency signal, and achieves gain stability in a frequency band. Through the collaborative design of a blocking capacitor and a divider resistor, the grid bias of an FET switch is strictly limited in a transconductance linear adjustment interval, and the interval covers 80% of the effective range of the threshold voltage of a gallium arsenide FET tube. The circuit is powered by a single power supply + 5V, stable work of each module is ensured through active bias and a power supply filter network, and the circuit is suitable for extreme temperature environments such as high-frequency communication and radar.