762 results about "Temperature drop" patented technology

The invention discloses an aircraft wheel cooling method and device, and the method comprises the steps: collecting the temperature of a brake disc and the air pressure of a hub in real time through a temperature and pressure sensor, calculating the temperature change rate and the pressure difference through an embedded processing module, and generating a thermodynamic initial parameter set; calculating a thermal stress distribution value of the brake disc based on the initial parameter set, and generating a cooling liquid flow and spraying angle instruction set in combination with a material threshold database; the opening degree of an annular pipeline piezoelectric valve is regulated according to an instruction set, an injection area is regulated according to flow velocity-surface area heat exchange efficiency, and waste heat is synchronously recovered to optimize power consumption; the thermal infrared imager obtains temperature field distribution, the initial parameter tolerance range is compared, the spraying angle and the flow instruction are corrected through a fuzzy PID algorithm, and temperature gradient errors are eliminated; and based on the temperature drop rate, the pressure stability and the waste heat recovery efficiency, an efficiency index is generated by using a neural network scoring model, and algorithm weights and piezoelectric valve response parameters are dynamically adjusted. The cooling efficiency is effectively improved, and the thermal stress risk is reduced.

According to the deep and far seawater suspension oil and liquid storage device and the underwater oil storage method thereof, a layered tank body structure is adopted, and a load adjusting cabin, a flexible oil storage cabin and a water storage cabin are arranged from top to bottom. The load adjusting cabin is used for dynamically adjusting the net buoyancy of the device through seawater feeding / discharging to reduce the load of the mooring system; the oil storage cabin adopts a flexible storage bag to adapt to volume change and is linked with the water storage cabin through a movable composite heat preservation partition plate, the partition plate comprises an active heating layer and a phase change material layer, when the oil temperature is too low, the active heating layer directionally heats crude oil, the phase change layer absorbs dissipated heat, latent heat is released during external low-temperature impact to buffer temperature drop, and dynamic temperature control is achieved. The device is moored and fixed through a gravity anchor, and multiple types of sensors are arranged to monitor the posture, stress, oil temperature and leakage state of the tank body in real time. The problems of oil storage tank deformation, high pour point oil heat preservation and mooring stability under the deepwater high-pressure environment are solved, and the device has the advantages of being low in construction cost, high in environmental adaptability and efficient in operation and maintenance and is suitable for safe storage and transportation of deep and far sea oil and gas resources.

The invention discloses a control method of a precise constant-temperature test chamber, and relates to the field of technical temperature control and automatic tests.The method adopts a control system of the precise constant-temperature test chamber for operation, and comprises a temperature control module, a test process automation module, a linkage coordination module and a data feedback diagnosis module. The control method of the precise constant-temperature test box comprises the following steps: detecting temperature data in the test box in real time through a temperature sensor, and transmitting the data to a temperature control module; according to the preset target temperature and the current temperature data, a segmented temperature rise or temperature drop strategy is adopted, and automatic switching between low-speed temperature change and high-speed temperature change is achieved; in the temperature change process, the current test process parameters are detected through a judgment module, a parameter linkage formula between the temperature and the test steps is established, and temperature control parameters are subjected to linkage adjustment; according to the invention, the limitation caused by independent operation of the traditional temperature control and test process is solved.

The invention provides a multi-protocol compatible pole charging safety state sensing and early warning system, and relates to the technical field of pole charging safety state sensing. The data acquisition module acquires component data and environment data of the electrode charging system; the pole charging strategy generation module outputs a pole charging strategy; the electrode charging temperature rise prediction module outputs a temperature prediction curve of an electrode charging system component; the liquid cooling calculation module outputs an electrode charging system component temperature drop curve; the theoretical temperature obtaining module obtains the theoretical electrode charging system component temperature. The safety state sensing module judges whether the electrode charging process is safe or not. According to the invention, the technical barrier is broken through the multi-protocol compatibility, and the construction and operation cost of the polar charging network is reduced; through precise temperature control and active early warning, the worry of a user on pole charging safety is solved, the acceptance of a consumption end is improved, obstacles are cleared away for popularization of a high-power pole charging technology, the power-assisted electric two-wheeled vehicle industry breaks through the charging efficiency bottleneck, the target of faster and safer charging is accelerated, and the method has remarkable technical value and industrial significance.

The invention provides a seamless steel tube and a preparation method thereof. The preparation method comprises the following steps that S1, metallurgical raw materials are smelted, and a blank is obtained; s2, perforating the blank to obtain a tubular billet; s3, the tubular billet is rolled, an obtained pierced billet is subjected to first rapid cooling, the first rapid cooling comprises first rapid cooling and second rapid cooling, and the temperature of the pierced billet is reduced by 30-150 DEG C in the first rapid cooling process; the temperature of the pierced billet is reduced by 30-150 DEG C in the second rapid cooling process; s4, the pierced billet subjected to first rapid cooling is subjected to sizing or reducing treatment, an obtained steel pipe is subjected to second rapid cooling, and the temperature of the steel pipe subjected to second rapid cooling ranges from 550 DEG C to 650 DEG C; and S5, the steel pipe obtained after second rapid cooling is subjected to air cooling. By reasonably arranging the cooling path, the hot-rolled seamless steel pipe with small straightness and ovality and excellent obdurability can be obtained.

A liquid immersion cooling system, that cools a heat generating body provided on a substrate, includes: a cooling device main body having a casing that houses the substrate and the heat generating body inside and stores a refrigerant for cooling the heat generating body; a circulation flow channel having both ends connected to each other in a communication state in the casing; an adsorption unit that is provided in the circulation flow channel and adsorbs impurities from the refrigerant circulating in the circulation flow channel; a pump that circulates the refrigerant in the circulation flow channel; and a control device that controls the pump. The control device includes a temperature drop detection unit that detects a decrease in temperature of the refrigerant in the casing, and a pump drive unit that drives the pump based on a detection of the temperature drop detection unit.

The invention discloses a cooking control method, a cooking utensil, a storage medium and electronic equipment. The method comprises the steps that when a target dish cooking instruction is received, heating operation and pressure maintaining operation are conducted on the cooking utensil according to pressure cooking parameters, when preset pressure maintaining duration is reached, exhausting and pressure relief are started, heating operation is conducted on the cooking utensil according to non-pressure cooking parameters after pressure relief is completed, and heating is stopped when dish adding and cover opening information is detected, calculating a temperature drop average value according to recorded bottom temperature drop change data after detecting a dish adding ending and cover closing signal, updating the initial dish adding cooking time length based on a comparison result of the bottom temperature drop average value and a temperature change threshold value, obtaining the dish adding cooking time length, and continuing heating according to the non-pressure cooking parameters, and the vegetable adding cooking time is reached. By means of the electric pressure cooker, the problem that an electric pressure cooker in the related technology cannot adapt to various food materials and needs to be cooked in a time-sharing mode is solved.

The invention discloses a molten drop arc-laser induced additive and subtractive integrated manufacturing system and method. The method comprises the steps that raw materials are heated through one or more energy sources to form molten drops; multiple kinds of energy are synchronously applied to molten drops to form a composite molten pool, in-situ coupling of additive and subtractive materials is achieved, and material removal is conducted on a cladding layer while material adding is conducted in the composite molten pool; dynamically adjusting the energy ratio and spatial-temporal distribution of each energy field, and optimizing the droplet transition and metallurgical quality; when the temperature of the cladding layer is reduced to a solid-liquid mixing interval or a thermoplastic deformation interval, shaping and surface processing are carried out, and the ideal component shape and surface smoothness are achieved; energy field parameters are dynamically adjusted based on real-time feedback of multi-sensor data, residual stress is inhibited in combination with a heating compensation technology, the heating compensation technology is used for effectively controlling heat input and stress release, and it is ensured that the stress state of a component in the manufacturing process is effectively managed.

The invention relates to the technical field of circulating water anti-freezing, and discloses a power plant circulating water anti-freezing system suitable for a cold region, and the system comprises a temperature sensing module, an anti-freezing heating module, a water flow disturbance module, an ice layer processing module, an intelligent regulation and control center and a fault safety module; when the circulating water system of the power plant operates in a cold region, the internal water temperature and external environment parameters of key nodes of a circulating water pipe network are monitored in real time, and a low-temperature early warning signal is generated based on a temperature field reconstruction algorithm of machine learning, so that abnormal temperature fluctuation can be recognized in time, early warning delay and false alarm caused by wind speed and humidity interference are avoided, and the working efficiency is improved. And in the circulating water anti-freezing process, the output power of the flexible electric heating body is dynamically adjusted through a graded heating mechanism, and the turbulence generator is linked to optimize water flow distribution, adapt to thermal inertia change of a pipeline and prevent the risk of local icing caused by sudden temperature drop.

The present invention relates to the field of metal materials and provides acid-resistant pipeline steel and a manufacturing method therefor. The chemical components of the acid-resistant pipeline steel comprise, in percentage by weight: 0.02-0.06% of C, 0.10-0.30% of Si, 0.80-1.10% of Mn, 0.02-0.08% of Nb, 0.06-0.12% of V, 0.20-0.30% of Ni, Mo ≤ 0.08%, 0.03-0.06% of Al, 0.0005-0.0030% of Ca, P ≤ 0.008%, S ≤ 0.002%, 0.004-0.006% of [N], [O] ≤ 0.002%, [H] ≤ 0.0015%, B ≤ 0.0008%, and the balance being Fe and inevitable impurities. The acid-resistant pipeline steel is obtained by sequentially carrying out KR pre-desulfurization, BOF top-bottom combined blowing smelting, LF refining, RH refining, continuous casting with stack cooling, heating, steel rolling, rapid water cooling, and heat treatment on blast furnace molten iron. By means of the synergistic effect of composition design and process optimization, the present invention solves the problems of poor low-temperature drop-weight tear test performance and large strength variation across the same plate in acid-resistant pipeline steel.

The invention discloses a titanium and titanium alloy thin bar continuous rolling production line and a rolling method. The rolling production line comprises a roughing roller set, a compensation heating device, a pre-finishing roller set, a temperature control device, a finishing roller set and a coiling device which are sequentially and linearly arranged. According to the production line, the (square) blanks can be linearly and continuously rolled into finished thin bars from one end to the other end, and the finished thin bars are coiled, so that the problems that the operation burden and the operation hidden danger exist in current reciprocating rolling, the temperature drop of the blanks cannot be effectively compensated in the continuous rolling process, and the production efficiency is low are solved. The problem that the temperature drop is further increased during material transfer among the procedures of radial forging, rough rolling and finish rolling is solved, so that the machining efficiency and yield of the titanium and titanium alloy coiled thin bars are effectively improved, meanwhile, the quality of finished products is further guaranteed through compensation and temperature control, and compared with remelting compensation after material transfer at present, the working efficiency is effectively improved, and the production cost is reduced. And the temperature compensation amplitude is reduced, so that the energy consumption of the whole processing stage is reduced.

The invention relates to the field of high-end ultrasonic transducer manufacturing, and particularly discloses a patch type ultrasonic transducer for deep tissue imaging and an acoustic material preparation method, and a backing preparation method comprises the following steps: weighing an adhesive, a metal filler and a non-metal additive according to a mass ratio of 15: 55-75: 2; fully and uniformly mixing the weighed raw materials, and putting the mixed sample into a molding mold capable of demolding; the pressure is maintained for 10-30 min under the conditions that the pressure is larger than 10 MPa and the plasticizing temperature of the adhesive is reached, then the heating function is turned off, when the temperature is reduced to 120 DEG C, the pressure is rapidly reduced to 0 MPa at the moment, the adhesive is taken out when the adhesive is naturally cooled to the room temperature, and the backing is obtained. The problems of high sound attenuation, low sound impedance and low sound velocity preparation of the backing are solved, the dilemma problem of low sound impedance and ultrahigh sound attenuation is effectively solved, and the problem that the ultrathin design of the wearable patch type ultrasonic transducer conflicts with the maintenance of excellent acoustic performance due to insufficient sound attenuation of the existing backing is effectively solved.

The invention relates to the technical field of asphalt, and particularly discloses modified asphalt for drilling fluid and a preparation method of the modified asphalt, and the modified asphalt comprises the following components in parts by weight: 100 parts of matrix asphalt, 12-15 parts of sulfonated modified monomer, 3-5 parts of zwitterionic modified monomer, 2-3 parts of crosslinking modifier, 3-5 parts of environment-friendly activating aid, 2-4 parts of neutralization regulator and 90-110 parts of deionized water. The preparation method comprises the following steps: firstly, melting and activating the matrix asphalt, and adding the environment-friendly activating aid to prepare the activated asphalt; carrying out gradient heating, and adding a sulfonated modified monomer, a zwitterionic modified monomer and a cross-linking modifier step by step to complete composite cross-linking modification; and finally, cooling, adding a neutralization regulator to adjust the pH value, adding deionized water, performing high-speed shearing and homogenizing, and cooling to obtain a finished product. The modified asphalt is stable and controllable in viscosity, excellent in high and low temperature filtration loss control performance, adaptive to complex drilling working conditions, environment-friendly in process and easy to implement.

The invention discloses an oversize LNG storage tank mixed medium precooling dynamic regulation and control system and method, and relates to the technical field of LNG storage tank precooling, and the system comprises a precooling medium supply module for providing two or more precooling media; the pre-cooling spraying distribution pipe network is arranged at the top of the inner tank of the LNG storage tank and is used for uniformly spraying a pre-cooling medium into the storage tank; the pre-cooling process control module is used for sequentially controlling the switching, proportioning and conveying rate of liquid nitrogen and LNG according to a preset stage; the thermal stress control and temperature difference balance subsystem is used for monitoring and adjusting the temperature difference of each area in the storage tank; the boil-off gas recovery module is used for collecting and treating natural gas boil-off gas caused by temperature drop in the pre-cooling process; the pre-cooling pre-safety control unit is used for executing air tightness detection, replacement, drying and cold brittleness pre-judgment operation before pre-cooling; a liquid nitrogen and LNG mixed medium pre-cooling scheme is adopted, and more efficient temperature reduction speed and uniformity can be achieved.

The invention relates to the field of forging forming, in particular to a ring rolling process heating constant-temperature device and a heating method, and the device comprises a heating mechanism, a monitoring mechanism and a control mechanism; the heating mechanism comprises a power source, a transformer and a coil, the power source, the transformer and the coil are electrically connected in sequence, the coil is provided with a U-shaped heating area and used for being arranged near a main roller of the ring rolling machine, and one section, in the circumferential direction, of the annular forge piece is located in the U-shaped heating area. The monitoring mechanism comprises an infrared thermometer, and the infrared thermometer is used for monitoring the temperature of the annular forge piece; the control mechanism comprises a controller, and the infrared thermometer and the power source are electrically connected with the controller. Through cooperation of the controller, the infrared thermometer and the heating mechanism, the problem of local temperature drop of the ring piece in the machining process is effectively solved, the near-isothermal ring rolling technology can be achieved, the uniformity and consistency of the structure of the ring piece are remarkably improved, and the defects of coarse grains, cracking and the like are overcome.

The invention belongs to the technical field of gas filling, and particularly relates to an automatic filling device for medical high-purity gas production, which comprises a three-axis movable frame, a mounting part, a filling mechanism, a protection mechanism, a recovery mechanism, a filtering mechanism and a capturing mechanism, the mounting part comprises a mounting box and a water tank mounted at the bottom of the mounting box, and the mounting box is controlled to move through a three-axis movable frame; the filling mechanism comprises a connecting nozzle and a conveying pipe connected with an external air source, and the connecting nozzle is communicated with an inner cavity of the conveying pipe; the protection mechanism comprises a nozzle and a control pump, and the control pump pumps liquid in the water tank and discharges the liquid to the joint of the connecting nozzle and the gas tank through the nozzle. The recycling mechanism comprises a collecting hopper and a connecting pipe, and the collecting hopper is located under the connecting nozzle; through cooperation of the structure, water flow continuously absorbs low-temperature heat, frosting blockage caused by sudden temperature drop inside and outside the mouthpiece can be prevented, static electricity can be conducted away through the electric conduction characteristic of the water film, and the hidden danger of burning explosion of combustible gas is reduced.

The invention provides a photovoltaic module anti-icing and defrosting structure based on a composite coating and a control method thereof, a system comprises a control unit, and a super-hydrophobic coating, a metal electrode layer, a phase change energy storage layer and a selective radiation layer which are sequentially laminated on the surface of photovoltaic glass, and the metal electrode layer is electrically connected with a pulse power supply. The control method comprises the following steps: M1: daytime working mode: the selective radiation layer radiates the heat of the photovoltaic module into the air to reduce the surface temperature of the photovoltaic module and reduce moisture condensation; m2: a night frost prevention mode: when the temperature is reduced to-2.5 DEG C, the phase change energy storage layer releases latent heat, and the frosting speed is delayed for 2-3 hours; due to the surface contact angle of the super-hydrophobic coating, water drops are difficult to stay and nucleate, and the ice adhesive force is less than 50kPa; and M3, a pulse deicing mode: when the thickness of the ice layer is detected to be greater than or equal to 0.2 mm, the current of a pulse power supply passes through a metal electrode layer, and instantaneous temperature rise is generated on an ice-glass interface, so that the ice layer is stripped. According to the system, multiple coatings are cooperated, so that the energy consumption is greatly reduced while the deicing and demisting effects are ensured.

The utility model discloses a double-station vehicle-mounted pipe blank laser head and tail double-centering device which comprises a conveying roller, two sets of transferring assemblies, a material stirring assembly, a centering assembly and a puncher inlet table, and the two sets of transferring assemblies are arranged between the conveying roller and the puncher inlet table. The conveying assembly is used for alternately conveying pipe blanks to an inlet table of a perforating machine, the shifting assemblies are arranged in the middles of the upper end and the lower end of the conveying assembly and used for loading and unloading the pipe blanks, and the centering assemblies are arranged at the left end and the right end of the conveying assembly and used for detecting the center points of the two ends of the pipe blanks and punching centering holes. The punching quality and the uniformity of the wall thickness of the steel pipe are improved, and the probability of rolling jamming accidents is reduced.

The invention discloses a mass concrete early-age strain monitoring method in a multi-field coupling state. The method comprises the following steps: S1, assembling a strain gauge; s2, carrying out sensitivity calibration on the assembled strain gauge; s3, before the strain gauge is embedded and installed, temperature rise-drop characteristics of the concrete hydration process are simulated in a standard temperature box, and a temperature sensitivity test of a substrate of the strain gauge is conducted, specifically, the correlativity of thermal strain-temperature in the temperature rise process and the temperature drop process is established; s4, temperature monitoring sensors are installed at the strain gauge installation points at the same time, and therefore the temperature monitoring value of concrete and strain gauge time synchronization is obtained; s5, after the strain gauge is pre-embedded and installed, accessing a data automatic acquisition and remote transmission system to realize key-controlled remote terminal data storage; and S6, constructing a remote data synchronous processing system, and realizing synchronous automatic acquisition and synchronous analysis processing of strain and temperature of each measuring point. According to the invention, the method is suitable for strain in-situ automatic monitoring in the whole maintenance process of the mass concrete structure.

The present application belongs to the technical field of mould, and particularly relates to a die-casting mould with a conformal cooling water channel, which comprises a mould body, a cooling water channel arranged in the mould body, the cooling water channel comprising a main water channel, an inner layer water channel and an outer layer water channel, the inner layer water channel and the outer layer water channel being respectively communicated with the main water channel, the inner layer water channel and the outer layer water channel being respectively arranged around the inner layer and the outer layer of an insert region on the mould body, an adjusting mechanism being arranged in the inner layer water channel, the outer layer water channel reducing the continuous heat transfer of the mould body to the insert and taking away the heat of the outer layer region, the opening of the adjusting mechanism in the inner layer water channel being gradually increased with the temperature drop of the insert, and the flow rate of the cooling liquid in the inner layer water channel being gradually increased with the temperature drop of the insert; the cooling speed of the insert position can be self-adaptively adjusted according to the temperature change, so that the insert is prevented from being damaged due to the too fast temperature difference change.

The invention belongs to the technical field of data processing, particularly relates to a fault processing method and system for an anti-icing simulation system, and aims to solve the problems that the early warning accuracy is not high and processing instructions are easy to mismatch in the prior art. The method provided by the invention comprises the following steps: acquiring multi-source simulation data of an anti-icing simulation system; determining a temperature drop rate and a humidity change rate according to the environment simulation data, and determining a dynamic regulation and control factor in combination with the system characteristic data; valve time sequence data of the anti-icing simulation system are obtained, the valve time sequence data and the dynamic regulation and control factors are input into a pre-trained time sequence prediction model for fault prediction, and a fault prediction probability is obtained; taking the fault prediction probability as a query vector, retrieving a plan node in a pre-constructed knowledge graph, and generating a predictive instruction; and when the fault prediction probability reaches a preset threshold value, executing the predictive instruction. Based on the method, the early warning accuracy and the instruction adaptability in the fault processing stage are effectively improved.

The invention discloses an asphalt paving construction control system and method based on temperature field analysis, and relates to the technical field of road engineering construction, and the system comprises a temperature field monitoring module which is used for obtaining the temperature information of different positions of an asphalt paving surface, and constructing a three-dimensional temperature field with absolute position information; the multi-source environment information acquisition module is used for acquiring current environment information; the temperature field processing and temperature drop prediction module is used for dividing the three-dimensional temperature field into a plurality of grid units, predicting the future temperature of each grid unit in combination with the current environment information, and predicting the residual effective rolling time required for reducing the temperature to the critical temperature; the segregation risk intelligent diagnosis module is used for carrying out risk judgment according to the gridded temperature field; and the rolling strategy dynamic decision module is used for calculating a rolling scheme for each grid according to the current temperature, the remaining effective rolling time and the risk judgment result of each grid. According to the invention, real-time quality diagnosis, prediction and closed-loop dynamic control of asphalt paving construction can be realized.

The invention relates to the field of air conditioner management, and discloses a management method for an air conditioner based on the Internet of Things, and the method carries out environment monitoring through a multi-mode sensor deployed in a high-dust area; comprising a temperature sensor, a humidity sensor and a thermal infrared imager. The dust concentration is monitored in real time, and when the dust concentration exceeds a set dust concentration threshold value, compressed air injection or ultrasonic vibration cleaning is triggered; a sensor response test is executed after cleaning, if the actual consumed time when the temperature reaches the set drop difference value exceeds the set consumed time, it is judged that the sensor is abnormal, and meanwhile a standby sensor is started and alarms are given; and finally, according to respective weight coefficients, fusing the temperature data of the temperature sensor, the infrared thermal imager and the air conditioner air outlet and combining the data of the humidity sensor, and outputting a corrected environment temperature value. And if a single sensor reading deviation fusion result exceeds a preset temperature range interval, a standby sensor is started and an alarm is given so as to realize accurate control of the environment temperature.

The invention discloses a high-strength anti-icing OPGW (Optical Fiber Composite Overhead Ground Wire) sag dynamic prediction and optimization system, particularly relates to the field of power transmission monitoring in alpine regions, is used for solving the problem that the sudden change of the sag of an OPGW is difficult to dynamically predict due to icing superposition, and is based on a load-deformation joint sequence accurately associated with a multi-source load response data set and segmented attached ice distribution. Identifying a tension rapid transfer node and fusing a temperature drop shrinkage trend, quantifying a risk through machine learning, driving local ice melting power distribution by a risk boundary, effectively suppressing a peak tension and leaving a controllable residual strain, and continuously correcting a prediction model by using time sequence increment assimilation; data driving and model correction are adopted for synchronous iteration, and prediction deviation caused by uneven ice attaching space and temperature shrinkage time sequence coupling is eliminated; the real-time ice melting scheduling output significantly delays the sag overrun caused by tension accumulation, ensures the optical fiber communication performance and the safe operation of the wire, and provides a quantitative decision basis for the operation and maintenance of the high-strength anti-icing OPGW line.

The invention relates to the technical field of electric meter box fault monitoring, in particular to an electric meter box fault monitoring system based on multi-source data fusion. The system comprises a data acquisition module used for acquiring internal and external temperature data of an electric meter box, total load power of the electric meter box and heat dissipation power of a heat dissipation system of the electric meter box; the temperature analysis module is used for setting a sliding window to synchronously slide on the internal temperature data, the external temperature data, the heat dissipation power and the total load power respectively to obtain a temperature drop coefficient and a heat dissipation effect correction value; the power analysis module is used for calculating a heat dissipation power characteristic value based on the heat dissipation power in the current sliding window, obtaining a working efficiency conversion coefficient of the heat dissipation system, and then obtaining a corrected working efficiency conversion coefficient; the early warning analysis module is used for acquiring an early warning index based on the correction working efficiency conversion coefficient corresponding to each sliding window; and carrying out early warning on the electric meter box fault according to the early warning index. The fault monitoring accuracy of the electric meter box can be improved.

The invention belongs to the technical field of steelmaking production scheduling, and provides a steelmaking production scheduling method and system based on digital twinning and a medium. According to the method, a continuous casting billet digital twin body is constructed, dynamic coupling analysis is conducted on cutting action and roller way conveying, and the matching performance of cutting and hot charging rhythms is judged; aiming at the mismatching condition, calculating the backlog driving force by utilizing a car-following model, and activating a dynamic buffer area in combination with a state intensity-spatial distance model; the casting blank temperature drop rate is corrected based on the heat transfer theory and the thermal radiation physical field model, and the hot charging fitness is evaluated; and establishing a space-time constraint scheduling model, and dynamically optimizing casting blank generation scheduling. The system comprises a matching identification module, a buffer establishment module, a hot charging analysis module, an adaptation analysis module and a rhythm adjustment module. According to the scheme, the continuous casting billet cutting is matched with the hot charging rhythm, and the hot charging fitness and the production efficiency are improved.

The invention discloses an application of a BOPP (Biaxially-oriented Polypropylene) film in preparation of a draw-bar box shell, and the draw-bar box shell with a multi-layer composite structure is formed by compounding a multi-layer BOPP film serving as a main body layer and a lining layer through a hot press molding process. According to the invention, the BOPP film commonly used in the packaging field is creatively applied to the box body structural member, the BOPP film lamination hot press molding replaces the traditional PP injection molding process, and the modular design of the combined layer structure and the collaborative innovation of the hot press process are combined, so that the prepared draw-bar box shell realizes the balance of high strength and light weight, and has no cracking phenomenon when falling at a low temperature of-30 DEG C, and the service life of the draw-bar box shell is prolonged. The low-temperature performance is excellent, and meanwhile, the production suitability and the color control precision are improved.

The invention discloses a compression system end area flow regulation and control method based on blade inner cooling under a low Reynolds number. Firstly, through calculation or measurement, a compression system end area three-dimensional flow field under different Reynolds numbers is obtained, and the end area loss variation degree is quantified. Then, revealing regulation and control rules of different isothermal cooling wall surface conditions on near-wall fluid physical property parameters, boundary layer growth rate and end region secondary flow migration intensity under a low Reynolds number, and establishing a correlation model of end region loss reduction and efficiency improvement and wall surface cooling intensity; and on the basis, a blade built-in convection cooling channel structure is designed, the cooling channel and blade surface flow heat characteristics are analyzed based on a conjugate heat transfer method, and inner cooling channel structure parameters are optimized until the wall surface temperature drop amplitude meets the preset requirement. And finally, checking the wall surface cooling effect, and measuring end region performance parameters during inner cooling regulation and control under a low Reynolds number to complete scheme verification. By introducing blade inner cooling, the flow characteristic of an end region can be remarkably improved on the premise that the structural complexity is not increased as much as possible, and stable and efficient operation of a compression system under the low Reynolds number is guaranteed.

The application provides a production method for improving the width direction performance stability of 800MPa grade complex phase steel and 800MPa grade complex phase steel produced by the method. In the production, the use of a width setting machine increases the edge deformation and promotes the grain structure of the edge to be more refined. The optimization of the water use strategy between the stands reduces the width direction temperature unevenness during the finishing rolling. The laminar flow cooling front section fast cooling technology is used to quickly cool the strip steel to the coiling target temperature, reduce the residence time of the strip steel in the water environment, and reduce the edge temperature drop during the period. The precise control laminar flow cooling edge shielding amount technology is used to make the edge of the strip product of different widths naturally flow through the cooling of the middle area cooling water, improve the edge temperature of the strip, and reduce the difference between the edge and the middle of the strip in the laminar flow cooling and the hot coiling cooling in the structure and performance. The product width direction tensile strength range is less than or equal to 35MPa, and the strength low point is greater than or equal to 815MPa.

The application provides a preparation method of a liquid crystal elastomer foam doped with boron nitride, comprising the following steps: 1) preparation of a NaCl salt template; 2) preparation of a liquid crystal elastomer monomer solution: a liquid crystal elastomer monomer solution is prepared by adding a sufficient amount of a toluene solution into 1,4-bis-[4-(3-acryloyloxypropoxy)benzoyloxy]-2-methyl benzene RM257 as a liquid crystal unit; 3) formation of a liquid crystal elastomer network; 4) preparation of a pre-crosslinked liquid crystal elastomer foam; 5) deformation programming of the liquid crystal elastomer foam: the pre-crosslinked liquid crystal elastomer foam is placed into the template for constant compression, and secondary crosslinking is performed using ultraviolet light under the constant compression state to form a secondary crosslinking network; at this time, the liquid crystal elastomer foam has a thermoreversible deformation characteristic, which is manifested as expansion at a temperature rise and shrinkage at a temperature drop, and the process cycle is reversible; and 6) preparation of a liquid crystal elastomer / heat-conducting BN composite foam.