43 results about "Stress factor" patented technology

The invention discloses a multi-vegetation salt marsh biological landform evolution prediction method and system. The method comprises the following steps: constructing a coupling model based on a water and sediment dynamic model and a vegetation dynamic model; performing water and sediment flow simulation by using the water and sediment dynamic model, obtaining a water and sediment flow simulation result after the simulation is finished, calculating characteristic values of stress factors, and interpolating the characteristic values of the three stress factors into a vegetation grid of the vegetation dynamic model from a water and sediment dynamic grid; performing vegetation distribution simulation by using a vegetation dynamic model, completing planting, succession, pressure death, annual death and expansion processes of vegetation on a vegetation grid, performing weighted averaging on a vegetation distribution simulation result from the vegetation grid to a water and sand dynamic grid after simulation is ended, and inputting the vegetation distribution simulation result to a water and sand dynamic model; long-term simulation of the biological landform of the salt marsh is achieved through a plurality of cycles. The simulation prediction method can solve the problems that an existing model can only consider a single vegetation species, tidal power is excessively simplified and the like, and the scientificity and accuracy of the simulation process are guaranteed.

The invention discloses a power battery SOC prediction method and system based on stress and physical constraint, and the method comprises the steps: carrying out the charging and discharging test of a standard battery under different external constraint pressures and environment temperatures, setting the charging and discharging conditions of different multiplying powers, collecting the performance data of the battery, and carrying out the preprocessing; constructing a P-BiLSTM model based on a neural network, embedding a plurality of physical constraints, combining data constraints with the physical constraints to obtain a neural network calculation loss function, and allowing embedding of physical knowledge; and training and testing the P-BiLSTM model based on the preprocessed battery performance data, and predicting the SOC of the to-be-tested battery under different external constraint pressures and ambient temperatures by using the trained P-BiLSTM model. According to the method, the stress factor and the physical constraint are considered at the same time for modeling, the generalization ability, the interpretability and the robustness under the complex working condition of the model are enhanced, and the SOC estimation accuracy is improved.

The invention provides a coastal wetland ecological restoration system construction method based on a native function, and the method comprises the steps: carrying out the comprehensive evaluation W of an ecological condition and the dynamic prediction of a stress factor f through employing an analytic hierarchy process and a machine learning model in combination with the historical data, the ecological current situation and the real-time monitoring data of an ecological system in a restoration region; determining a degradation degree and a restoration target according to the ecological condition comprehensive evaluation W and the stress factor f; performing repair layout on the repair target, wherein the repair layout comprises corresponding engineering measures and management measures; and an ecological monitoring system and an evaluation index system are established. The method has the following advantages that comprehensive evaluation of the ecological condition of the coastal wetland is achieved through the analytic hierarchy process, restoration measures and management measures are effectively taken, and ecological restoration of wetland native function remodeling is ensured; a perfect system construction method is provided for ecological restoration of the coastal wetland, and important social, economic and environmental benefits are achieved.

The invention belongs to the technical field of electric power engineering, and discloses a crosslinked polyethylene-silicone rubber interface contact characteristic analysis method, which is characterized in that crosslinked polyethylene-silicone rubber interface contact is equivalent to contact between a rough surface and an ideal smooth surface; constructing a random rough surface by adopting a spatial frequency synthesis method, and describing a hyperelastic stress-strain relationship of the silicone rubber structure by adopting an Ogden model to obtain Ogden model parameters of the random rough surface; a finite element method is adopted to construct a crosslinked polyethylene-silicone rubber interface contact characteristic analysis model, and contact morphology and stress distribution calculation results of the crosslinked polyethylene-silicone rubber insulation interface under different pressure and surface morphology conditions are obtained. According to the method, the influence rule of the material surface roughness and the interface pressure factor on the mesoscale cavity size and the local stress distribution in the interface can be analyzed more accurately and effectively, and quantitative analysis of the internal cavity and the local stress distribution under different interface contact conditions in the mesoscale is realized.

The invention relates to the field of data processing, in particular to an MEMS gyroscope temperature drift compensation method based on a neural network, which comprises the following steps: firstly, acquiring data through a multi-source sensor, and calculating a composite disturbance index fused with a mechanical agonist factor and a thermal stress factor so as to evaluate whether a system state deviates from a routine or not in real time; and then, the dynamic confidence of the LSTM model is calculated by using the index. And finally, according to the confidence coefficient, carrying out adaptive weighted fusion on a high-precision LSTM model prediction value and a high-robustness baseline polynomial model compensation value. According to the method, the compensation precision is guaranteed under the normal working condition, smooth transition to the safe baseline model is achieved under the abnormal working condition, and the overall reliability and safety of the compensation system are remarkably improved.

The invention discloses a new energy equipment part aging prediction method and system based on digital twinning and multi-source data fusion, and relates to the technical field of digital twinning and intelligent prediction of new energy equipment, and the method comprises the steps: building a digital twinning model, and carrying out the working condition label labeling of multi-source monitoring data according to the current operation working condition of the equipment; extracting working condition aging characteristic parameters, calculating change gradients and working condition switching stress factors, and storing the change gradients and the working condition switching stress factors into a working condition associated aging characteristic library; inputting the working condition aging characteristic parameters and the working condition switching stress factors into a cross-working condition aging accumulation model, and outputting an aging accumulation index; and taking the aging accumulation index as a simulation initial state, simulating an attenuation trajectory of a component performance parameter under a preset future working condition sequence, when the performance parameter reaches a preset failure threshold value for the first time, extracting a running time length, and taking a difference value between the running time length and a current actual running time length as a component aging prediction remaining life. According to the invention, prospective residual life prediction based on the current aging state is realized.

The present invention relates to a biosensor nucleotide construct for monitoring of periplasmic protein or peptide production in a host cell, comprising an inducible promoter responding to a stress factor of the host cell, wherein the promoter is operably linked to a gene encoding a biomarker.

The invention relates to a stress loading device and method for amorphous alloy magnetic property measurement, and belongs to the technical field of amorphous alloy magnetic property measurement, and the device comprises the steps: to-be-measured amorphous alloy is placed in a magnet exciting coil, passes through an iron yoke, and is connected with a loading end of an electromagnet loading part; the electromagnet loading part is used for carrying out stress loading on the to-be-tested amorphous alloy from two ends of the to-be-tested amorphous alloy; and the double-H coil is placed in the excitation coil, and the magnetic characteristics of the amorphous alloy are measured by accurately measuring the magnetic flux density and the magnetic field intensity after the pressure is stable. The anti-fracture clamp is made of a polyether-ether-ketone material, is mounted in an inner cavity of the excitation coil and is used for clamping and fixing the amorphous alloy to be detected from the upper side and the lower side of the amorphous alloy to be detected; and the double-H coil is placed in a groove formed in the upper surface of the anti-fracture clamp. The mechanical stress scene borne by the amorphous alloy in actual complex working conditions can be simulated, and an effective solution is practically provided for amorphous alloy magnetic characteristic measurement environments needing to consider mechanical stress factors.

To provide a route search device capable of promoting the use of a road section where a user easily feels stress.SOLUTION: Based on the data of the plurality of drivers, the driver search unit 20 searches the plurality of drivers for a similar driver who feels stress from the stressor in a manner similar to that of the target driver. Subsequently, the allowable range estimation unit 21 estimates the allowable range of the target driver for the characteristic value of the stressor based on the stress data indicating the degree S of the stress felt by the similar driver during traveling in the road section for each characteristic value of the stressor existing in the road section traveled by the searched similar driver in the past. Subsequently, based on the estimated allowable range, the route search unit 22 searches for a travel route of the vehicle C e such that a road section in which the characteristic value of the stress factor is within the allowable range is traveled preferentially over a road section outside the allowable range.SELECTED DRAWING: Figure 1

To precisely obtain the remaining life of a component based on the use history of the component and determine the propriety of reuse of the component based on the remaining life.SOLUTION: A reuse propriety determination device 20 acquires use history data related to the use history of a component in a vehicle. The use history data includes data on at least one stressor that the component has been subjected to while being used in the vehicle. The reuse propriety determination device 20 calculates the remaining life of the component based on the acquired use history data. Therefore, the remaining life of the component can be determined with high accuracy based on the actual use of the component. Furthermore, the propriety of reuse of the component can be appropriately determined based on the calculated remaining life.SELECTED DRAWING: Figure 2

The present application relates to the technical field of health monitoring, in particular to a cancer survivor work pressure monitoring system based on big data, which comprises a physiological parameter analysis module, a stress cause analysis module, a work load distribution module and an abnormal stress monitoring module. In the present application, the sensitivity and accuracy of data analysis are improved through the difference analysis of heart rate fluctuation, skin conductance and blood pressure range, the data points with large fluctuations are screened and classified, the efficiency of abnormal data capture and classification is optimized, the stress cause identification accuracy and distribution law insight are improved, the key stress factors are determined through sensitivity sorting, the stress evaluation is more scientific and quantitative, the priority dynamic adjustment is realized in load classification and grouping, the work pressure distribution is optimized, the abnormal stress point monitoring and grading judgment are strengthened, the stress abnormality grade fine monitoring is realized, the data quantification and dynamic monitoring capability are enhanced, the stress management efficiency is improved, and the targeted data support is provided for personalized health intervention.

The application discloses a mouse vitiligo induction model based on chronic stress factors, wherein different kinds of stress factors capable of triggering stress response of animals are applied to stimulate the mouse periodically within a certain time period, so as to prevent the mouse from producing habitual response to the stress source and to promote the mouse to become white and the tail epidermis to be flaky. The technical method is different from the existing vitiligo model method, is based on the mechanism of occurrence and development of vitiligo observed in the clinic, and promotes the mouse to truly develop the vitiligo phenomenon from the whole instead of simulating the disease evolution locally. Compared with the existing vitiligo promoting mechanism, the effect is more stable and the authenticity is higher. The technical method is based on the objective fact that the clinical vitiligo patients often combine anxiety and depression to design the stress factors, and considers that the stress factors and the occurrence and development of vitiligo may be inter-caused and viciously circulate, namely, the adverse life events as the stress factors cause the damage and dysfunction of the melanin synthesis system at the micro level and form the vitiligo change at the macro level.

The invention belongs to the field of aviation reliability tests, and particularly relates to an aviation generator product reliability strengthening test method. Comprising the following steps: analyzing a fault mode, a fault mechanism and a load of an aero-generator caused by a lowest agreed level, and determining main sensitive stress factors of an aero-generator product; according to the determined sensitive stress factor, a reliability strengthening test item is determined according to the working characteristics of the generator, and the vibration stepping stress test is an environmental stress strengthening test; the acceleration and deceleration test is a working stress strengthening test; the heating test is a working stress strengthening test; carrying out test parameter and profile design for each test item, carrying out a vibration stepping stress test, adopting a product working environment vibration spectrum pattern, and taking an environment vibration test requirement as an initial condition; acceleration and deceleration test: adopting acceleration and deceleration indexes required by normal work as initial conditions, and performing the test step by step; and heating test: taking the inlet oil temperature during normal work as an initial condition, and performing the test step by step.

The invention relates to the technical field of coal mine safety, and provides a multi-factor impact risk evaluation method and system for instability of a super-thick surface soil-coal pillar structure. According to the evaluation method, when a target stope is of an extremely thick surface soil structure, stress factor impact evaluation is carried out on the target stope according to superposed stress borne by the target stope, and micro-seismic factor impact evaluation is carried out on the target stope based on micro-seismic monitoring of the target stope; and then coupling a stress factor impact evaluation result and a micro-seismic factor impact evaluation result of the target stope to realize impact risk evaluation of the target stope. Therefore, the overall impact risk of the stope is comprehensively evaluated by combining the stress factor impact risk evaluation result and the micro-seismic factor impact risk evaluation result, the impact risk identification of the island working face under the condition of extremely thick surface soil is perfected, and the deficiency of an island working face bearing stress estimation method is made up; and rock burst accidents caused by blind mining of the island working face under the condition of extremely thick surface soil are avoided.

The invention discloses a biomarker combination based on pollutant exposure detection and application thereof, and relates to the technical field of biomarkers, the biomarker combination comprises an integrin subunit itg-alpha11, a nuclear transcription factor nf-kb, and an antioxidant stress factor nrf2; according to the biomarker combination disclosed by the invention, a complete association network from molecular response to phenotypic risk is constructed by accurately capturing an action mechanism of BDE-47 at molecular and cellular levels; the rapid diagnosis of pollutant exposure can be realized in the early stage of embryonic development, and the risk of development malformation and the like can be effectively early warned; and meanwhile, a quantitative basis is provided for evaluating the pollution remediation effect, and accurate formulation of an environment quality standard and optimization of an aquaculture management strategy are supported. The biomarker combination not only deepens the theoretical cognition of a pollutant toxicity mechanism, but also provides an innovative tool for environmental health risk assessment and ecological protection practice, and has important theoretical significance and wide application prospects.

The invention belongs to the technical field of storage management of biological fermentation products, and particularly relates to a temperature and humidity self-adaptive control method for prolonging the storage time of a microbial agent. The method comprises the following steps: acquiring real-time environmental parameters of a warehouse, and calculating an environmental fluctuation stress factor according to the deviation between the environmental parameters and a historical mean value; constructing a fluctuation correction type microbial inactivation rate model, introducing an environmental fluctuation stress factor into a kinetic equation to calculate an instantaneous inactivation rate, and performing integration to obtain an actual accumulated damage index; and dynamically calculating a temperature set value according to the proportional relation between the actual damage and the theoretical expected damage, and issuing the temperature set value to the temperature control equipment for adjustment after safety boundary verification. According to the method, the recessive accumulated damage of the environmental fluctuation to the microorganisms is calculated, so that the environmental self-adaptive adjustment based on the life cycle is realized, and the storage energy consumption is effectively reduced while the activity retention rate of the microbial agent is guaranteed.

The present invention discloses a method for calculating the time-varying sensitivity of evaporative stress to influencing factors, and the method comprises the following steps: step 1, calculating the time series of evaporative stress index; step 2, calculating the abnormal component of the evaporative stress index without seasonal trend; step 3, obtaining the preceding influence sequence of the abnormal component of the evaporative stress index; step 4, calculating the abnormal component of the evaporative stress influencing factor without seasonal trend; step 5, establishing a memory dynamic linear model; step 6, determining the optimal expansion factor parameter of the model; step 7, calculating the time-varying sensitivity sequence. The method of the present invention effectively solves the problem of obtaining the instantaneous sensitivity change of evaporative stress within a short duration, and provides reliable theoretical and technical support for the study of the response mechanism of evaporative stress and timely drought warning.

The invention relates to a ship coating environmental adaptability modeling and evaluating method under the action of temperature-salinity-irradiation, which comprises the following steps of: firstly, obtaining coating degradation data through a temperature-salinity-irradiation multi-factor orthogonal test, secondly, constructing a coating electrochemical performance degradation model, and further, establishing two models for environmental related parameters, and performing parameter estimation by using a maximum likelihood estimation method. And finally, calculating the environment adaptive service life of the ship coating through the established model, and comparing the influence degrees of different stress factors on the service life of the coating. The method comprises the following specific steps: 1, carrying out orthogonal test design on three factors of temperature, salinity and irradiation; 2, constructing an electrochemical performance degradation model of the ship coating; 3, environment related parameter modeling and maximum likelihood estimation; and 4, ship coating environment adaptation life calculation and stress influence analysis. The method provided by the invention is suitable for the fields of environmental adaptability evaluation of the ship equipment coating in a complex environment and the like, and has relatively high operability.

The invention relates to the technical field of crane fault early warning, and discloses a tower crane maintenance and fault early warning intelligent management system, which comprises a meteorological score calculation module for calculating to obtain a meteorological score; the aging score calculation module is used for calculating and obtaining an aging score; the data acquisition module is used for acquiring image data and vibration data; the load eccentric value calculation module is used for calculating to obtain a load eccentric value; the vibration feature extraction module is used for calculating to obtain a vibration feature value; the braking fault score calculation module is used for calculating to obtain a braking fault score; the dynamic threshold value generation module is used for obtaining a fault prediction score threshold value through a prediction model; the braking fault judgment module judges that the braking fault score exceeds the fault prediction score threshold value, and the fault risk exists; according to the method, the meteorological factors, the aging factors of the tower crane, the stress factors of the lifting hook and the vibration factors of multiple positions of the braking component are quantified, and the braking fault score and the dynamic threshold value are generated, so that the accuracy of fault early warning of the tower crane is improved.

The subject matter of the present application is a composition, especially cosmetic and / or dermatological composition comprising a combination of a roselle extract and a betaine compound, as well as a non-therapeutic cosmetic treatment process of the skin to fight against the signs of a stress factor-induced osmolarity dysregulation of the epidermis, such as the appearance of fine lines and wrinkles, the withering, the thinning, the dryness, the looseness, the dull appearance, or the heterogeneous surface, of the skin.

The invention provides an interactive cognitive ability evaluation method for unmanned driving. The method comprises the following steps: constructing a layered scene library; designing a pressure factor, injecting the pressure factor into each scene, and carrying out scene testing; in the scene testing process, testing data are collected, and features are extracted; calculating a cognitive entropy-interaction entropy; and carrying out comprehensive scoring and grade authentication. According to the interactive cognitive ability evaluation method oriented to unmanned driving, the cognitive and interactive process of an unmanned driving system can be efficient and predictable, the uncertainty in the decision-making and interactive process of the unmanned driving system is quantified through entropy in the information theory, a pressure test scene is designed and injected, the change of the entropy value is evaluated, and the evaluation accuracy of the interactive cognitive ability of the unmanned driving system is improved. Therefore, the comprehensive ability score is obtained.

The present invention relates to a system (100) and method for detecting and determining specific defects and / or malfunctions of a PEM fuel cell (10). In addition to measuring operating parameters, comparing measurement signals with reference signals, and determining whether specific defects and / or malfunctions are present, in particular, the control of the operating parameters during a test operation is performed according to a provided stress factor pattern, which stores critical settings and / or profiles of operating parameters for causing defects and / or malfunctions of the fuel cell (10) to be tested.

This invention provides a method, apparatus, computer equipment, and readable storage medium for predicting slope welding stress. It establishes a database containing slope factors, welding process factors, and asymmetric stress factors through thermo-mechanical coupled numerical simulation and conducts experimental verification. After data preprocessing, an LSTM-ResNet-Diffusion hybrid model is constructed and trained. The model predicts asymmetric stress factors, and SHAP analysis clarifies the correlation patterns and critical thresholds of these factors. This invention offers high prediction accuracy and can precisely reveal the correlation mechanism between various influencing factors and asymmetric stress, providing a scientific basis for optimizing slope pipe welding processes.

The present invention relates to compositions, in particular cosmetic and / or dermatological compositions, comprising a combination of a roselle extract and a betaine compound, as well as to a process for the non-therapeutic cosmetic treatment of the skin to combat signs of stressor-induced osmoregulation of the epidermis, such as the appearance of fine lines and wrinkles, atrophy, thinning, dryness, laxity, dull appearance, or an uneven surface of the skin.

The invention belongs to the technical field of yarn performance detection, and discloses a vortex spinning yarn tensile property detection method which comprises the following steps: cutting out a main detection sample, pre-stretching the main detection sample, and collecting an initial stress value; stretching the main detection sample to generate a stress change curve, when the sample is detected to be stretched to preset strain, collecting continuous stress data in the relaxation process, continuing stretching until the sample is fractured, and recording the representative fracture strength; identifying a stress stable section, extracting stress characteristic parameters, and obtaining breaking strength through coupling correction; calculating stress relaxation characteristic parameters based on the continuous stress data; preparing parallel detection samples, repeatedly stretching the parallel detection samples, and calculating a strength uniformity index according to the numerical value groups of the parallel detection samples; correlation integration is carried out through a detection evaluation system, and a comprehensive detection report is formed. According to the method, detection errors caused by non-stress factors are effectively offset, and the corrected breaking strength obtained through calculation is closer to the real mechanical property of the yarn.

The application provides a chip performance degradation model construction method and device under accelerated aging test, comprising: constructing a candidate test condition space containing temperature, voltage, workload, test duration, idle holding time, read-write ratio and queue depth, performing initial accelerated aging test and collecting performance data, reliability data and telemetry data, and then training a chip performance degradation model capable of outputting prediction uncertainty. According to the information gain, degradation mode distinction degree, test cost, sample damage cost and constraint condition of the candidate test condition, the next round of test condition is generated, and the model is updated after multiple rounds of test and the degradation analysis result is output. The application can improve the test effectiveness under limited chip samples, and is used for distinguishing the influence of different stress factors on chip performance degradation.

The invention relates to the field of vegetation yield influence evaluation, and discloses a vegetation yield influence evaluation method and system based on multi-factor stress, and the method comprises the steps: obtaining leaf area index data in a vegetation growth cycle of a research region, and obtaining a monthly average leaf area index value corresponding to the research region; utilizing the prediction model and the monthly average leaf area index value to obtain a vegetation yield prediction value corresponding to the research area; obtaining monthly average values of various stress factors according to various stress factor data; and correcting the vegetation yield predicted value according to the monthly average value of each stress factor to realize evaluation of the vegetation yield. According to the method, the vegetation yield is accurately and efficiently evaluated by monitoring various stress factor data.

The present application relates to the field of data processing, and more particularly to a MEMS gyroscope temperature drift compensation method based on neural network, first, data is acquired through multi-source sensors, a composite disturbance index fused with mechanical excitation factor and thermal stress factor is calculated to evaluate whether the system state deviates from the normal in real time. Then, the dynamic confidence of the LSTM model is calculated using the index. Finally, the high-precision LSTM model prediction value and the high-robustness baseline polynomial model compensation value are adaptively weighted and fused according to the confidence. The present application ensures the compensation accuracy under normal working conditions, and smoothly transitions to the safe baseline model under abnormal working conditions, significantly improving the overall reliability and safety of the compensation system.

The application provides a product low-cost reliability test profile design method, which comprises the following steps: analyzing stress factors and total time of a specified single-cycle reliability test profile T and further comprises the following steps: decomposing the single-cycle reliability test profile into stress level combinations of different levels of stress factors; determining stress combination time without vibration, normal temperature and normal humidity stress and stress combination time with abnormal temperature and humidity stress or vibration; designing a low-cost reliability test profile containing test profiles outside and inside a test box; and decomposing stress combinations according to the designed low-cost reliability test profile containing test profiles outside and inside the test box. In the case of meeting the unchanged cumulative test stress experienced by the electromechanical equipment, the reliability test is split into comprehensive stress test bench test and non-comprehensive stress test bench test, and under the condition of meeting the consistent product reliability verification, the reliability test cost is greatly reduced.

The invention relates to devices for weighing, sorting and evaluating meat-producing and egg-laying breeds of poultry. The present system comprises an open housing having a weighing platform mounted thereinside, said weighing platform being equipped with four strain gauges connected by a communication channel to an electronic control unit comprising a control card, coupled to a power supply, and a display. The housing is open on the underside and is raised above the ground. Mounted inside the housing beneath the weighing platform is a vertical dividing partition with a horizontal inclined partition mounted perpendicular thereto. The weighing platform and the inclined partition have rotary mechanisms that are fixed in the walls of the housing. Disposed outside the housing are two motors for imparting movement to the weighing platform and the inclined partition. Mounted inside the housing are a sensor for monitoring the horizontal level of the weighing platform and a sensor for monitoring the position of the inclined partition, and on each side of the dividing partition is a sensor for monitoring the vertical level of the weighing platform during rotation. The electronic control unit comprises a power board for controlling the motors. The technical result of the claimed invention consists in reducing time expenditure, increasing workforce productivity, improving weighing accuracy, minimizing the effect of stress factors on poultry and reducing biological risks.