57 results about "Stress testing" patented technology

The invention discloses a myocardial perfusion image classification method and system based on a single resting state, and belongs to intelligent analysis and auxiliary diagnosis of medical images. The method comprises the following steps: acquiring SPECT three-dimensional voxel data in the single resting state, and performing image reconstruction by adopting an OSEM algorithm; segmenting the myocardial region by using a pre-trained U-Net convolutional neural network, and mapping a segmentation result to a two-dimensional polar coordinate graph conforming to the AHA17 segment model; extracting a multi-dimensional feature vector; a single-phase inference model MSR-Net based on biphase labeling is constructed, in the training stage, segment classification labels of resting-load biphase images are used, in combination with segment consistency indexes, label correction is carried out, and in the inference stage, only resting state features are input, and then a pixel-level perfusion defect distribution diagram and ischemia scores of 17 myocardial segments can be output. Quantitative and segmental evaluation of myocardial ischemia can be completed by using single resting state imaging, exercise or drug load examination is avoided, and cardiovascular adverse events and complication risks are reduced.

The invention discloses a hydraulic fracturing ground stress testing device and method, and relates to the technical field of hydraulic fracturing, and the hydraulic fracturing ground stress testing device comprises testing equipment. According to the hydraulic fracturing ground stress testing device and testing method, through the design of testing equipment, a water source enters the water pump pipe from the water inlet pipe, water flow is sprayed outwards from the nozzle in the water pump pipe, so that the hydraulic fracturing effect is achieved, the rotating mechanism is driven to rotate through flowing of the water flow, and the effect of cleaning the inner wall of a pipeline through friction is achieved; the rubber pipe is extruded by sliding the packing top block on the packing base, so that the rubber pipe is extruded and deformed to be attached to the surface of soil, the packing effect on a test part is achieved, the silica gel column is arranged in the rubber pipe, the silica gel column has a certain supporting effect and prevents a part from being concaved inwards and collapsed, and the rhombic film is arranged on the outer side of the rubber pipe, so that the rubber pipe is prevented from falling off. Therefore, surface friction force of components is increased, service life of the components is prolonged, and friction load is dispersed.

The invention provides an EMMC pressure testing method and system combining PRBS7 and a clock code pattern in the technical field of EMMC testing, and the method comprises the steps: S1, creating an automatic testing script based on Python, randomly generating PRBS7 sequence data and a clock code pattern for each bus mode through the automatic testing script, and setting the size of a data block transmitted at a time; s2, obtaining the number of cycles, test interval time and test data; s3, the automatic test script automatically executes a pressure test on the EMMC based on the cycle index, the test interval time, the test data, the PRBS7 sequence data, the clock code pattern and the data block size; s4, recording a test log in real time in the process of executing the pressure test by the automatic test script; and S5, automatically generating a test report by the automatic test script based on the test log, displaying the test report, and storing and feeding back the test report. The method has the advantages that the test quality, the test efficiency and the universality of the EMMC pressure test are greatly improved.

The present application relates to heat shrink sleeve test technical field, especially to a kind of stress test system of heat shrink sleeve, comprising: test module, to carry out stress test to heat shrink sleeve;Detection module is connected with the test module, including with the clamping device is connected to detect the area of wear area in clamping surface visual sensor;Clamping adjustment module is connected with the test module, to determine the micro-tilt angle compensation of clamping surface according to wear area area proportion in clamping surface;Sampling adjustment module is connected with the detection module and the clamping adjustment module respectively, to determine the weight distribution coefficient of low temperature sampling point according to the difference between actual temperature and target temperature in heating process;Cooling adjustment module is connected with the test module and the sampling adjustment module respectively, to determine cooling rate limit value according to cooling pipe surface dew coverage area proportion.The present application improves the stress test stability of heat shrink sleeve.

This invention discloses a sample loading fixture for stress testing, relating to the field of stress testing technology. The invention includes a base plate with several support components mounted on its bottom surface. A slide rail mechanism is fixed to the top of the base plate, and a support assembly and a testing assembly are connected to the top of the slide rail mechanism. The support assembly and the testing assembly are interconnected. A positioning seat is mounted at one end of the top surface of the base plate. A positioning component is provided on one side of the support assembly, and a pressure plate mechanism is provided on the other side. An adjustment mechanism is provided between the testing assembly and the base plate. A position counting component is provided on one side of the slide rail mechanism. This invention, through a stepped planning of the distance the support assembly is pulled, and by comparing the tensile force display of the force gauge and the tensile stress reading of the stress sensor, forms multiple regular test control groups. Coupled with a high-precision testing environment, this enables comprehensive measurement of tensile stress data and completes a comprehensive and accurate recording of the tensile strength of the substrate glass.

The invention discloses electroplating equipment and an electroplating liquid stress testing method. The electroplating liquid stress testing method is applied to electroplating equipment comprising an electroplating bath and an auxiliary bath, and the electroplating bath is communicated with the auxiliary bath. The electroplating solution stress testing method comprises the following steps: placing the testing device connected with the cathode and the anode in the auxiliary tank, and testing the stress of the electroplating solution. Therefore, the electroplating liquid stress testing method at least has the following advantages that the electroplating liquid does not need to be exported, at least the exporting step can be omitted, the testing steps are simple, and the flow is short; a temperature control system or a heat source does not need to be designed, so that the detection cost can be reduced, the temperature during testing can be maintained without adjusting the temperature control system, and the production efficiency can be improved; the electroplating liquid does not need to be led out before and after electroplating, stress testing can be conducted even in the electroplating process, and flexibility is high; the environment for testing the stress of the electroplating liquid is closer to the actual production environment of products such as probes, and the testing precision is high.

The present invention provides a ground stress testing device and method based on distributed double-sided pressure hydraulic pillow monitoring. The device includes: a double-sided pressure hydraulic pillow, buried in a borehole on the side wall or face of a tunnel, with at least three double-sided pressure hydraulic pillows at different installation angles buried in each borehole; the double-sided pressure hydraulic pillow includes a main body, a pressure plate, a pressure-bearing liquid, a pressure conversion device connection port, a one-way valve, and a sealing nut connecting screw; the one-way valve and sealing nut are used to inject the pressure-bearing liquid into the main body of the double-sided pressure hydraulic pillow; a pressure conversion device is installed at the pressure conversion device connection port and is used to sense the pressure of the pressure-bearing liquid; a cable is connected to the pressure conversion device for communicating and transmitting the sensed pressure data to a data acquisition instrument at the orifice; and a data processing device is used to calculate ground stress in different dimensions based on the pressure data. The present invention can solve the problem that the combination of one-way hydraulic pillows affects the grouting quality, thereby resulting in insufficient representativeness of the test results.

The present invention discloses a ground stress testing device, which includes an expansion sealing assembly and a high-pressure water pipe. The expansion sealing assembly includes a first expansion section, a second expansion section, and an adapter arranged in sequence along its length. The first expansion section and the second expansion section are respectively sealed and connected to both sides of the adapter, and at least one of the first expansion section and the second expansion section is movably connected to the adapter. The high-pressure water pipe extends into the expansion sealing assembly along the first expansion section, and the water outlet of the high-pressure water pipe is connected to the impact channel in the adapter, and the water outlet of the impact channel faces the hole wall. The expansion section of the ground stress testing device of the present invention can move freely relative to the adapter during the expansion process, thereby ensuring that the adapter provided between the expansion sections is not damaged by tearing due to external force, ensuring that the test work can be carried out normally, and the high-pressure water pipe provided in the first expansion section can be bent and deformed to a certain extent, ensuring that the device can be smoothly removed and has good applicability.

The invention relates to the technical field of heat-shrinkable tubing testing, in particular to a stress testing system of a heat-shrinkable tubing, which comprises a testing module used for testing the stress of the heat-shrinkable tubing; the detection module is connected with the testing module and comprises a visual sensor which is connected with the clamping device and is used for detecting the area of a wear region in the clamping surface; the clamping adjusting module is connected with the testing module and is used for determining the micro dip angle compensation amount of the clamping surface according to the area proportion of the abrasion area in the clamping surface; the sampling adjustment module is respectively connected with the detection module and the clamping adjustment module and is used for determining a weight distribution coefficient of a low-temperature sampling point according to the difference quantity between the actual temperature and the target temperature in the heating process; and the cooling adjustment module is respectively connected with the test module and the sampling adjustment module and is used for determining a cooling rate limit value according to the proportion of the condensation coverage area on the surface of the cooling pipe. According to the invention, the stress test stability of the heat-shrinkable sleeve is improved.

The invention relates to a method for improving stress test precision of a crack flexibility method in the field of stress test. The method comprises the following steps: step 1, cutting a stress test sample from a material to be tested; 2, pasting a strain gauge at a preset position on the surface of the sample I; 3, after the sample is clamped, a wire cutting machine is adopted to conduct progressive cutting along a preset path, the machine is stopped after cutting is conducted to the preset depth every time, strain data are recorded, and the average value of sample strain is calculated; 4, simulating a linear cutting process through finite element software, and calculating a flexibility matrix C; and 5, calculating the residual stress distribution of the sample based on the flexibility matrix C and the strain average value. According to the method, the condition number of the coefficient matrix can be effectively and controllably reduced by constructing the specific scaling matrix and carrying out row scaling processing on the solving equation; and the morbidity of solving the equation set is fundamentally improved.

This invention provides a risk stress testing method, apparatus, storage medium, and electronic device. The method includes: responding to a risk stress test command, determining the risk event to be tested and its scenario information; determining the data type of the risk event; the data type is either continuous or discrete; if the data type of the risk event is continuous, acquiring the corresponding measurement model; the measurement model is established based on historical risk data and historical scenario information of the risk event; inputting the scenario information into the measurement model to obtain the output result of the measurement model; determining the occurrence frequency of the risk event and the single-event loss value of the risk event based on the output result; and determining the stress test result of the risk event based on the occurrence frequency and single-event loss value of the risk event. This method can accurately obtain stress test results.

This application discloses a data processing method, which includes: performing a stress test on a first application based on a first request volume to obtain a first test result, wherein the first request volume is the concurrent request volume in each time unit of the stress test; determining a first increment based on the first test result; and performing a stress test on the first application based on a second request volume to obtain a second test result, wherein the second request volume is the sum of the first request volume and the first increment. In this way, by determining the concurrent request volume for the next stress test based on the test result of the previous stress test, the problem of inaccurate judgment of the stress test inflection point caused by excessive pressure increase can be effectively avoided, while also solving the problem of excessively long measurement time caused by insufficient pressure increase, thereby improving the efficiency of stress testing.

The embodiment of the application provides a stress testing method and a stress testing device combined with performance bottleneck positioning, the stress testing device comprises a preset performance diagnosis tool, and the method comprises the following steps: in the case that a performance bottleneck exists in the process of performing stress testing on a target service, determining a target instance in which the target service is deployed; a performance diagnosis thread corresponding to the preset performance diagnosis tool is arranged in the target instance; calling the performance diagnosis thread to perform performance diagnosis on the target instance, obtaining a diagnosis result, and the diagnosis result is used for positioning the performance bottleneck reason of the target service.

A stress testing method includes obtaining traffic information of a to-be-tested object; generating, based on the traffic information of the to-be-tested object, a stress model matching a stress target, where the stress model includes at least one group of application programming interface (API) request sequences, each group of API request sequences includes at least one API request, and the stress target indicates an upper limit of stress that the to-be-tested object is capable of bearing; and then performing stress testing on the to-be-tested object based on the stress model.

The invention provides a medical big model testing method and device, and relates to the technical field of data processing, and the method comprises the steps: constructing a dynamic medical knowledge graph, calculating the knowledge half-life period of a medical knowledge entity based on the dynamic medical knowledge graph, and obtaining a medical big model according to the relation among the current time, the release time attribute and the knowledge half-life period; calculating the timeliness score of each medical knowledge entity, screening the medical knowledge entities with the timeliness scores lower than a preset timeliness threshold value, and generating a dynamic test case; inputting the dynamic test case into a to-be-tested medical large model to perform a multi-modal timeliness test, screening out a high-value failure sample from a test result, and extracting an output conclusion of the medical large model for the high-value failure sample, performing semantic matching on the output conclusion and each historical version of medical knowledge entity in the medical knowledge entity version sequence, and positioning a failure knowledge node; and performing a pressure test on the medical large model.

The invention discloses a pressure testing device and a pressure testing method for an IV-type hydrogen storage cylinder, and belongs to the technical field of new energy. The method comprises the following steps: S101, degassing: degassing a liquid medium until the gas content is less than M; s102, air tightness detection: installing a detection tool on a bottle opening of the hydrogen storage bottle; compressed gas is introduced from the gas injection port; when the air pressure in the hydrogen storage cylinder is P1, injection of the compressed gas is stopped, and the pressure drop rate is obtained within the time T1; if the voltage drop rate is smaller than V, the step S103 is carried out; s103, a liquid medium is injected, vacuumizing is conducted through a vacuum opening, and after pressure relief is completed, the degassed liquid medium is introduced through a liquid injection opening; when the liquid level reaches the low level of the liquid level window, vacuumizing is stopped; liquid injection is stopped when the liquid level reaches the high level of the liquid level window; s104, whether the liquid level is reduced or not is observed within the time T2, and if the liquid level is not reduced, the step S104 is executed; and S104, pressure resistance test: pressurizing to test pressure from the liquid injection port, and carrying out the pressure resistance test.

The invention discloses an underground complex stress test method, and mainly solves the technical problem of uncertainty of a test result due to the fact that complex stress cannot be completely avoided when an underground stress test is carried out in the prior art. The method comprises the following steps: preparing a protolith sample which is the same as a to-be-measured geomedium, and then installing three stress meters in the protolith sample to obtain a test sample; calibrating the test sample through a quasi-static calibration experiment to obtain a static coefficient matrix of the test sample; calibrating the test sample through a dynamic calibration experiment to obtain a dynamic coefficient matrix of the test sample; placing the test sample in a to-be-tested geomedium, and acquiring and outputting an actually measured stress matrix of the three stress meters through a data acquisition instrument; and calculating the actually measured stress matrix in combination with a calibration result to obtain a real stress matrix of the to-be-measured geomedium loaded on the test sample, thereby completing the test of the underground complex stress. The method can improve the accuracy of stress testing.

Embodiments presented provide for stress testing of downhole wireline formation testing equipment. Certain embodiments provide for stress testing of geological stratum which exhibit high permeability. A method to perform a stress test is disclosed. The method may comprise conveying a bottom hole assembly on a drill pipe to a testing location and setting at least two packers at the testing location. The method may comprise performing an injection of a fluid obtained from the drill pipe into the testing location and stopping the injection of the fluid from the drill pipe. The method may comprise performing at least one breakdown cycle injection with the fluid from the drill pipe and determining when the at least one breakdown cycle injection with fluid results in an open reservoir. The method may comprise performing an injection followed by falloff cycles using surface based pumps and deflating the at least two packers.

The invention relates to a method for determining the current actual pressure p IST a diaphragm pressure expansion vessel (1) which has an interior space with a known nominal volume V N which is separated by a membrane (2) into a gas space (3) and a liquid space (4), wherein the filling volume of the liquid space (4) is unknown, wherein the gas space (3) of the membrane pressure expansion vessel (1) is connected to a testing device (8) and the pressure in the gas space (3) is changed by means of the testing device (8). It is intended that the test device (8) first measures the current pressure p1 in the gas space (3), then the test device (8) adds a gas volume V z with a pressure p z and thereby a pressure increase in the gas space (3) to a pressure p2 is generated, whereby finally from the values ​​p1, p2, p z , V Z and V N the actual form p IST is calculated.

The present invention discloses a method for determining the cut slot deviation in single-slit method stress testing. The method for determining the cut slot deviation in single-slit method stress testing includes: S1: performing a cut slot operation on the workpiece to be tested and determining the strain measurement points, where the strain measurement points include the first strain measurement point P1 and the second strain measurement point P2; S2: establishing an original coordinate system xoy with the midpoint of the line connecting P1 and P2 as the origin O; S3: establishing a deviation coordinate system x'o'y' with the center of the line connecting the two endpoints of the long side of the cut slot as the origin O'; S4: measuring a plurality of distance data from the two endpoints of the long side of the cut slot to the strain measurement points; S5: calculating the cut slot deviation angle between the x-axis of the original coordinate system and the x'-axis of the deviation coordinate system and the cut slot displacement coordinates of the origin of the deviation coordinate system in the original coordinate system according to the plurality of distance data. The present invention can improve the accuracy and efficiency of determining the cut slot deviation.

The utility model relates to the technical field of mechanical property testing devices, and particularly discloses a test fixture for stress testing, which comprises a first adapter sleeve, a first hemispherical mounting piece, a second adapter sleeve and a second hemispherical mounting piece. The first hemispherical mounting piece and the second hemispherical mounting piece are both arranged to be hemispherical, the size of the first hemispherical cavity is matched with the size of the first hemispherical mounting piece, and the size of the second hemispherical cavity is matched with the size of the second hemispherical mounting piece. Compared with the prior art in which a U-shaped opening test fixture is adopted, the test fixture for stress test has the advantages that additional bending stress is effectively prevented from being added in the loading process, and the test fixture is simple in structure, convenient to operate and high in test efficiency. Therefore, the actual test force value is larger than the set value, and the test is easy to be invalid.

The utility model relates to stress test technical field provides a clamping device for stress test, including main part assembly: the main part assembly includes fixed plate and mounting plate, the mounting plate fixed connection is in the both ends of fixed plate, protection assembly: protection assembly includes U -shaped frame, guard board, plugboard and guide block, guide groove, observation window, the U -shaped frame fixed connection is in the front end of fixed plate, and the guard board sets up in the front end of fixed plate, and the plugboard fixed connection is in the rear portion of guard board, and the guide block fixed connection is in one end outside of plugboard. The utility model discloses through setting up protection assembly, through the auxiliary cooperation between U -shaped frame and guard board, can pull out guard board outward, and then through observation window observation makes the guide block slide in the inside of guide groove, can assist staff when using clamping device, provides the function of protection for it, avoids the waste material splashing and causes the staff to be mistaken for injury.

The invention provides a link performance analysis method and device based on full-link pressure measurement, and a medium, and the method specifically comprises the steps: obtaining a pre-constructed full-link pressure measurement system; based on the full-link pressure measurement system, pressure measurement processing of a single link is carried out, a performance bottleneck analysis result of the single link is obtained, and the pressure measurement processing comprises step pressurization processing and limit performance pressure measurement processing; and after the performance bottleneck analysis of the single link is completed, carrying out full-link pressure measurement processing based on the full-link pressure measurement system to obtain a performance bottleneck analysis result of the full link. According to the invention, on the basis of carrying out pressure measurement on a single link, full-scene multi-link pressure measurement can be completed. According to the invention, on the basis that a full-link pressure measurement system obtains Agent performance data, the bottleneck point in the link is integrally analyzed in combination with a middleware key data item in a monitoring system. According to the invention, data sources in a full-link pressure measurement system are expanded, and a feasible link bottleneck analysis mode and method are provided.

The application provides a stress test system, method and product of a Ceph cluster, and belongs to the technical field of stress test. The system comprises a distribution module configured to distribute connection configuration information of a Ceph cluster to be tested or any stress test instruction to a plurality of stress testers; a stress test module configured to generate a stress test instruction for the Ceph cluster to be tested, the stress test instruction comprising at least one of a Mon stress test instruction, a Mgr stress test instruction, a MDS stress test instruction and an OSD stress test instruction; and a monitoring module configured to monitor cluster state information of the Ceph cluster to be tested during stress test and component states of each component in the Ceph cluster to be tested. The application aims to improve the accuracy of stress test of the Ceph cluster.

The utility model discloses a stress tester, which comprises a case, an analyzer arranged at the upper part of the case, a carrier stage arranged on the upper surface of the case, and clamping mechanisms arranged on the two sides of the carrier stage, the clamping mechanism comprises a first clamping block and a second clamping block which are distributed on the two sides of the object stage. The first connecting rod and the second connecting rod are each provided with a first synchronous belt wheel, a driving assembly is arranged in the machine box, and the driving assembly drives the first connecting rod and the second connecting rod to rotate synchronously. Through the arrangement of the clamping mechanism, the first clamping block and the second clamping block are used for clamping the two ends of the glass bottle, one end abuts against the bottle bottom, the other end is inserted into the bottle opening / abuts against the bottle opening, and the two ends rotate coaxially, so that the glass bottle is driven to rotate, and technicians do not need to manually rotate the glass bottle when comprehensively detecting the internal stress of the glass bottle; and the rotation speed is constant and controllable.

The utility model belongs to the technical field of medical instruments, and particularly relates to a front-end pressure testing connector assisting tile-type action, which comprises a blowing nozzle shell, an air inlet is arranged on the surface of the top of the blowing nozzle shell, and an air outlet is arranged on the surface of the bottom of the blowing nozzle shell. The connector at the bottom end of the blowing nozzle shell is connected with the connector of the pressure gauge pipeline, then the blowing nozzle shell is attached to the face of a patient, gas exhaled by the patient can be conveyed to the pressure gauge through the blowing nozzle shell, and therefore the force exerting degree of the patient during tile-type action can be estimated, and the patient can do the tile-type action conveniently. In this way, a patient can conveniently conduct blowing action through the blowing nozzle shell with the large air inlet size, convenience is brought to tile-type action testing, then an operator can wear and fix the blowing nozzle shell on the head of the patient through the elastic binding band, and the situation that after the hand, pressing the blowing nozzle shell, of the patient is loosened carelessly, the blowing nozzle shell is damaged is avoided. And the blowing nozzle shell directly falls off, so that the stability of the test joint in use is ensured.

The invention provides a crustal stress testing device and method for relieving stress from the inside, and relates to the field of crustal stress measurement, the device comprises at least one crustal stress sensor, and the crustal stress sensor comprises a hollow inclusion; the supporting mechanism and the inner wall of the hollow bag body are arranged at intervals to form a closed cavity; the closed cavity is filled with the filler, and the filler takes the supporting mechanism as a supporting foundation and achieves the effect that the hollow inclusion body does not deform under the action of the external surrounding rock and the grouting material; the storage bin is communicated with the closed cavity, and a micropore valve used for controlling connection and disconnection is arranged between the storage bin and the closed cavity; the element and control bin is used for controlling at least part of the filler in the closed cavity to enter the storage bin so as to relieve the internal stress; the plurality of measuring rings are distributed on the surface of the hollow inclusion body, a plurality of measuring points are uniformly distributed on each measuring ring, each measuring point is provided with a sensitive element, the sensitive elements are used for generating equivalent deformation under the condition that the internal stress is relieved, and the plurality of measuring rings are used for measuring the deformation of the sensitive elements at the corresponding positions.

The present invention discloses a method and device for adjusting the number of microservice instances. The invention comprises: obtaining the operating parameters of each microservice during a system stress test to obtain test operating parameters; determining predicted usage information, wherein the predicted usage information includes at least the microservices to be used in a future time period and the operating parameters of the microservices to be used, and the predicted usage information is the usage information of the microservices to be used in a preset future time period; and adjusting the instances corresponding to the microservices to be used based on the test operating parameters and the predicted usage information, wherein one microservice corresponds to at least one instance. The present invention solves the problem of uneven instance resource allocation during peak traffic periods in related technologies.

The present application relates to a kind of stress testing systems while drilling, including first installation hole, second installation hole, third installation hole and fourth installation hole being opened on the side wall of drill collar;Wherein: first installation hole and second installation hole are located in the first cross section perpendicular to the direction of drill collar axis, and the included angle between the axis of first installation hole and the axis of second installation hole is 180 degrees;Third installation hole and fourth installation hole are located in the second cross section perpendicular to the direction of drill collar axis, and the included angle between the axis of third installation hole and the axis of fourth installation hole is 180 degrees, the included angle between the axis of first installation hole and the axis of third installation hole is 90 degrees;First installation hole, second installation hole, third installation hole and fourth installation hole are respectively installed with a sensor module.The setting of installation hole and sensor module in the present application can be used to measure drill collar torque, bending moment and WOB, and it is convenient to more comprehensively understand the downhole stress condition of drill collar.

The embodiment of the invention provides a risk early warning method and device, equipment and a medium, and relates to the technical field of artificial intelligence. The method comprises the following steps: acquiring risk factors; inputting the risk factor and a preset investment target combination into a large language model to obtain an output risk analysis result and a first risk level; according to a risk analysis result, combining current market data to generate a pressure test scene; inputting the pressure test scene into the large language model to obtain an output trend prediction result; according to the trend prediction result, determining a risk influence result of the pressure test scene on the preset investment target combination and a second risk level; and generating a risk early warning result according to the risk analysis result, the first risk level, the risk influence result and the second risk level. Therefore, according to the method, risk early warning can be carried out when the risk factors (no risk event occurs) are obtained, so that market participants can perceive potential risk hidden dangers in advance, and effective countermeasures can be taken in advance.