431 results about "Extreme temperature" patented technology

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 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 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 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 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 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.

The invention relates to the technical field of thermal control of spacecrafts, and discloses a satellite battery phase change thermal control system based on Joule thermal effect and high-orientation heat conduction framework cooperative regulation, and the system is characterized in that a resistance heating unit, a high-orientation graphene heat conduction framework and a composite phase change material are tightly coupled; and bidirectional temperature adjustment of the spaceflight lithium ion battery in an extreme temperature environment is realized. When the battery needs to be heated at low temperature, the resistance wire is electrified to generate heat, the heat is quickly and uniformly diffused by virtue of ultrahigh thermal conductivity in the oriented graphene film surface, and a heating network is constructed; when heat dissipation is needed at high temperature, the composite phase change material absorbs heat and stores energy through solid-liquid phase change, and the high-orientation heat conduction framework guides heat to be directionally conducted to the water cooling plates on the two sides, so that a heat dissipation channel is formed. By means of the synergistic effect of electric-heat conversion and directional heat conduction, rapid uniform-temperature heating and directional dredging heat dissipation of the battery are achieved, the problem that a traditional aviation lithium battery is low in heat management efficiency is solved, and the temperature adaptability and working stability of a battery system are improved.

The invention discloses a method and device for predicting an extreme temperature and a storage medium, and relates to the technical field of air temperature prediction. The method comprises the following steps: acquiring a historical temperature average field, a historical temperature flat field and historical circulation factor observation values corresponding to a plurality of target circulation factors; determining a plurality of target space modes, an abnormal temperature evolution sequence and a corresponding abnormal temperature prediction sequence according to the historical temperature distance flat field; determining predictable effective duration according to the abnormal temperature evolution sequence and the corresponding abnormal temperature prediction sequence; determining a target modal weight coefficient corresponding to each target space modal according to the predictable effective duration; determining a predicted extreme temperature range flat field of the temperature region to be measured according to the historical circulation factor observation value and the target modal weight coefficient; and superposing the predicted extreme temperature distance flat field and the historical temperature average field to obtain an extreme temperature prediction result. According to the invention, the problem of low prediction accuracy of the extreme temperature in the prior art can be solved.

The utility model provides a Dewar structure and a vibration test device, the Dewar structure comprises an outer cylinder, an inner cylinder and a cover plate, the outer bottom of the outer cylinder is connected with an outer cylinder flange, the top of the inner cylinder is connected with the top of the outer cylinder, a vacuum cavity is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and a clamping assembly is arranged in the inner cylinder and used for clamping a piece to be tested. A temperature sensor and a heating device are further arranged in the inner cylinder; the cover plate is detachably connected to the tops of the outer cylinder and the inner cylinder and provided with a liquid conveying opening and an exhaust opening. The Dewar structure is connected to a vibration table through an outer cylinder flange to form a vibration test box, a low-temperature working medium is input through a liquid conveying opening in a cover plate to evaporate and absorb heat to reduce the temperature in the inner cylinder so as to meet the extreme low-temperature requirement, and the temperature in the inner cylinder is increased through heating of a heating device so as to meet the extreme high-temperature requirement. Temperature monitoring is carried out based on the temperature sensor, accurate temperature control in a vibration test is achieved, and the requirement of a test piece to be tested for an extreme temperature environment is met.

The invention discloses a multi-system new energy battery wide-temperature-range fire extinguishing material based on a selenium vacancy heterogeneous interface. The multi-system new energy battery wide-temperature-range fire extinguishing material is prepared from the following raw materials in percentage by weight: 6 to 10 percent of Vse-CoSe2 / FeSe2, 82 to 89 percent of carrier, 3 to 5 percent of ZrSe2 and 1 to 3 percent of polydiselenothiophene. The invention also provides application of the fire extinguishing material in a battery fire extinguishing agent. By precisely regulating the selenium vacancy concentration of the heterogeneous interface to be 5 * 10 < 18 >-1 * 10 < 20 > / cm < 3 > and the lattice matching degree to be smaller than or equal to 5%, directional inhibition of thermal runaway reactions of different battery systems is achieved, and the method is particularly suitable for battery safety protection in an extreme temperature environment (-45-600 DEG C). The fire extinguishing material maintains physical stability (no solidification / decomposition) and chemical activity (90% of free radical quenching efficiency gt) in a range of-45 DEG C (a vehicle-mounted battery in an extremely cold region) to 600 DEG C (battery thermal runaway peak temperature).

This utility model discloses an automotive wheel hub testing fixture, including a fixed platform with an outer frame fixedly connected to it. A detection mechanism and a fixture connection mechanism are arranged on the fixed platform, with the detection mechanism located at the side of the fixture connection mechanism. This automotive wheel hub testing fixture, through a heating mechanism in a fourth chamber and a cooling mechanism in a third chamber, combined with unidirectional ventilation holes in the second and third partitions, can simulate extreme temperature environments. Real-time monitoring and feedback are achieved using temperature sensors, adapting to performance testing of wheel hubs under different climatic conditions such as high-temperature exposure and low-temperature freezing. Simultaneously, the rubber friction stripes on the outer side of the wheel simulate road surface friction, and a pressure sensor monitors the contact pressure in real time, reproducing the wheel hub's stress state under different driving loads. This enables comprehensive testing of both temperature and load variables, covering complex scenarios in actual use, thereby detecting the quality of the wheel hub.

This invention discloses a heterojunction low-temperature curing silver paste suitable for space HJT battery applications, its preparation, and its application. The heterojunction low-temperature curing silver paste comprises the following components in parts by weight: 75-92 parts of a first conductive powder, 0.5-5 parts of a second conductive powder, 2.25-9.5 parts of a composite resin system, 0.5-4.8 parts of a blocked isocyanate curing agent, 0.05-0.5 parts of a latent accelerator, 0.2-1.8 parts of a coupling agent, 0.3-1.5 parts of a dispersant, and 1.5-6.4 parts of a solvent; the composite resin system comprises epoxy resin and cyanate ester resin, with a mass ratio of epoxy resin to cyanate ester resin of (2-8):1. The silver paste of this invention can form a dense cross-linked network after curing at 150-250℃, while meeting the low outgassing requirements of materials for spacecraft. It can withstand extreme temperature difference cycles from -196℃ to +150℃ and high-energy particle irradiation environments in space, and is suitable for the preparation of metallized electrodes for HJT solar cells in low Earth orbit and medium-high Earth orbit.

The invention relates to the technical field of thermal control coatings, in particular to a liquid metal commercial aerospace thermal control coating adaptive to extreme temperature difference, which comprises a substrate binding layer and a thermal control functional layer, the thermal control functional layer is arranged on the side wall of the substrate binding layer, a thermal circulation pipe is arranged in the thermal control functional layer, and a composite heat conduction layer is arranged on the side wall of the thermal control functional layer. A limiting stabilizing layer is arranged on the side wall of the composite heat-conducting layer. By arranging the multi-layer composite structure and the liquid metal, efficient heat regulation and control in an extreme temperature difference environment are achieved, the substrate combination layer is made of a radiation-resistant material, it is ensured that the structure stability is kept in a strong radiation environment, the liquid metal material in the heat control function layer and a cross circulation plate form a three-dimensional heat conduction network through a disc-shaped heat control circulation pipe, and the heat conduction efficiency is improved. And by arranging the separation cavity, atomic oxygen erosion is effectively blocked, and the inorganic thermal control coating layer of the separation cavity can adjust the surface thermal radiation characteristic.

The invention belongs to the technical field of functional crystal materials, and discloses a neodymium-doped forsterite crystal, the chemical formula is Nd < 3 + >: Mg2SiO4, and the doping concentration range of Nd < 3 + > is 0.05 at%-0.2 at%. The preparation method of the neodymium-doped forsterite crystal comprises the following steps: S1, loading a synthesized Nd < 3 + >: Mg2SiO4 raw material into an iraurita crucible; s2, installing a zirconium oxide temperature field and an iraurita crucible in the single crystal furnace, and filling oxygen to inhibit decomposition and volatilization of the raw materials; and S3, melting the raw materials, carrying out constant-temperature treatment, selecting seed crystals for seeding, enabling the crystals to grow to a set length size in an equal-diameter manner until the crystals are separated from the melt after the growth is finished, and annealing in the crucible to obtain the large-size single crystals. The neodymium-doped forsterite grown by the method disclosed by the invention can still keep a stable structure in a lunar vacuum and extreme temperature environment, is not easy to oxidize or change phase, is suitable for being used as a standard sample for a long time, and can be used for calibrating a Raman spectrometer through specific wavelength and intensity signals.

The invention relates to a vessel for the long-term storage of DNA in space at a constant temperature of -196 °C. The aim is to protect biological samples – especially DNA – for decades to centuries from the extreme environmental conditions of space, including vacuum, intense radiation, extreme temperature fluctuations and mechanical stresses. The vessel has a three-layered structure: 1. Inner chamber made of boron nitrogen nanotubes (BNNTs) that offer outstanding protection against cosmic radiation, high mechanical strength, chemical inertness and temperature resistance. 2. Middle insulating layer made of aerogel that minimizes heat exchange and keeps the cryogenic temperature constant. 3. Outer protective layer made of titanium, which protects against micrometeorites, It protects against physical impacts and corrosion. Technical advantages: • Long-term stability of DNA through consistently low temperatures. • Effective radiation protection against cosmic and solar radiation. • Excellent thermal insulation thanks to aerogel. • Mechanical robustness due to titanium. Areas of application: • Securing and archiving genetic material for research, space travel and long-term preservation. • Provision of DNA for future scientific or biological restoration projects. Special feature: The capsule is compact, space-compatible, and can be used as part of space missions, space stations, or interplanetary projects.

The invention discloses a method and a system for predicting discharge voltage of an insulator string at an extreme temperature, and belongs to the technical field of high voltage and insulation. The method comprises the following steps: acquiring test data of an insulator string discharge voltage test, preprocessing the test data, and dividing the preprocessed test data into a training set and a test set according to a preset proportion; obtaining an optimal key hyper-parameter, establishing an XGBoost model through the optimal key hyper-parameter, and training the XGBoost model by using the training set to obtain an XGBoost discharge voltage prediction model; and inputting a new data set to be predicted into the model, and predicting the discharge voltage of the insulator string at the extreme temperature to obtain a predicted value of the discharge voltage of the insulator string at the extreme temperature. Compared with a traditional discharge voltage calculation method, the method can predict the discharge voltage of insulators with different string numbers and under different meteorological conditions, is higher in accuracy, does not need a tedious calculation program, and is high in prediction efficiency.

The invention relates to the technical field of projection display, in particular to display equipment and a vehicle. According to the invention, by utilizing the characteristic that light rays from backward flowing of sunlight are partially reflected to the image source display surface and partially transmitted to one side of the back surface of the first reflector according to a transmission path determined by the first reflector, the transmitted light rays are received by the light receiving part arranged on one side of the back surface of the first reflector; and the equivalent temperature of the corresponding position of the image source display surface is detected through a temperature sensor on the incident surface of the light receiving part, so that the influence of sunlight of the same source on the surface of the image source is judged. According to the invention, the fineness of temperature monitoring on the surface of the image source can be improved, the temperature of any position on the surface of the image source can be accurately detected, and the capability of positioning extreme temperature generated by backward sunlight is enhanced.

The invention relates to the technical field of shear thickening intelligent protection system control, in particular to a stable regulation and control method for the performance of a shear thickening intelligent protection system at an extreme temperature, which realizes breakthrough through three technical innovations: firstly, temperature subareas (low temperature, medium temperature and high temperature) and impact grading (light, medium and heavy) are preset in the first step; an accurate regulation and control reference is provided for different working conditions; 2, acquiring impact load, temperature and protection performance data (thickening amplitude and recovery time) in real time through a pressure sensor, a temperature sensor and a viscosity sensor (claim 3) adaptive to extreme temperature, and accurately judging the category of a'temperature-load 'working condition; 3, dynamically correcting a threshold value (claim 5) in combination with real-time performance feedback based on a working condition judgment result in the step 3, reducing the threshold value by 5-10% when the thickening amplitude is insufficient, and increasing the threshold value by 5-10% when the thickening amplitude is excessive; the method has the beneficial effects that the response threshold adaptation error can be greatly reduced under various extreme temperature working conditions, and the thickening response time is remarkably shortened.

This invention relates to a method for assessing the defect risk of epoxy-impregnated paper bushing cores under rapid temperature rise conditions, belonging to the field of bushing core insulation condition assessment. This invention aims to solve the problem that existing technologies cannot assess the impact of bushing core defects on partial discharge and dielectric properties under rapid temperature rise scenarios. The technical solution includes: constructing a feature parameter dataset and determining defect classification thresholds; conducting performance parameter tests before and after rapid temperature rise; comparing and analyzing the defect discharge characteristic spectrum of the bushing core, the sensitivity of partial discharge under different voltage measurement methods, and the changes in high-voltage broadband dielectric spectrum characteristic parameters under cyclic voltage excitation; and finally achieving defect risk classification assessment. This invention can comprehensively assess the electrical performance reliability of bushing cores, effectively identify potential defect risks within the core, and provide technical support for the safe and stable operation of ultra-high voltage transmission systems under extreme temperature environments.