2508 results about "Stress conditions" patented technology

The invention provides a disposable programmable ECG sensor patch for the non-invasive detection of risk patterns according to programmed criteria. The patch is programmed by a medical professional to select one or more monitoring parameters for detection and alarm indication. One application is to detect changes in the ECG due to cardioactive drugs. Another application is triggering an alarm for a cardiac patient during a stress condition. The programmable patch operates in conjunction with an external programming unit for selecting the detection monitoring parameters.

A quality assurance benchmark system tests a target executable application under load stress conditions over an extended period of time. The system has user-controlled parameters to benchmark performance, scalability, and regression testing before deploying the application to customers. The system includes a display processor and a test unit. The display processor generates data representing a display image enabling a user to select: input parameters to be provided to the target executable application, and output data items to be received from the target executable application and associated expected range values of the data items. The test unit provides multiple concurrently operating executable procedures for interfacing with the target executable application to provide the input parameters to the target executable application, and to determine whether data items received from the target executable application are within corresponding associated expected range values of the data items.

A thermal interface material is described for thermal coupling of an electronic component to a thermally conductive member. The thermal interface material includes a viscoelastic polymer matrix material, fusible solder particles in the matrix material, and filler particles in the matrix material. The solder particles have a melting temperature below a selected temperature (e.g. 157° C. for indium) and the filler particles have a melting temperature substantially above the selected temperature (e.g. 961° C. for silver). The filler particles keep the thermal interface material intact under adverse thermal and stress conditions.

An assurance system for testing the functionality of a computer system by creating an overlay of the computer system and routing selected traffic to the overlay while assessing the performance of the system. The system may be used for purposes of managing the testing of the computer system and delivery of comprehensive reports of the likely results on the computer system based on results generated by the assurance system, including such things as configuration changes to the environment, environment load and stress conditions, environment security, software installation to the environment, and environment performance levels among other things.

A system and method for determining and applying characterization correlation curves for aging effects on an organic light organic light emitting device (OLED) based pixel is disclosed. A first stress condition is applied to a reference pixel having a drive transistor and an OLED. An output voltage based on a reference current is measured periodically to determine an electrical characteristic of the reference pixel under the first predetermined stress condition. The luminance of the reference pixel is measured periodically to determine an optical characteristic of the reference pixel. A characterization correlation curve corresponding to the first stress condition including the determined electrical and optical characteristic of the reference pixel is stored. Characterization correlation curves for other predetermined stress conditions are also stored based on application of the predetermined stress conditions on other reference pixels. The stress condition of an active pixel is determined and a compensation voltage is determined by correlating the stress condition of the active pixel with the curves of the predetermined stress conditions.

A control system for a wind power plant that includes a damage module and a control module. The damage module compares existing stress conditions on one or more component parts of the wind power plant to current energy generating costs. The control module alters electric power generated by the wind power plant based upon the comparison.

Silicidation of a polysilicon line having frcc upper sidewalls is performed so that no stress is applied to the sidewalls of the polysilicon line, resulting in the formation of a reduced stress silicide structure. This is accomplished by forming a polysilicon line having spacers on either side which extend above the upper surface of the polysilicon line but which are spaced from the edge of the polysilicon line. A layer of a metal such as titanium or tungsten is provided in contact with the top surface polysilicon line. The structure is annealed to cause the metal to react with the polysilicon to form a layer of silicide. Since the upper side portions of the polysilicon line are spaced away from the spacers during the silicidation anneal, the growing silicide region has room to expand without being subjected to lateral stresses in the silicidation process. The suicide is formed in a reduced stress condition, as compared to conventional processes, so that the silicide layer produced will be more readily converted to the desired low resistivity phase of silicide.

The complexity of a fracture network may be enhanced during a hydraulic fracturing operation by monitoring operational parameters of the fracturing job and altering stress conditions in the well in response to the monitoring of the operational parameters. The operational parameters monitored may include the injection rate of the pumped fluid, the density of the pumped fluid or the bottomhole pressure of the well after the fluid is pumped. The method provides an increase to the stimulated reservoir volume (SRV).

The invention provides a disposable programmable ECG sensor patch for the non-invasive detection of risk patterns according to programmed criteria. The patch is programmed by a medical professional to select one or more monitoring parameters for detection and alarm indication. One application is to detect changes in the ECG due to cardioactive drugs. Another application is triggering an alarm for a cardiac patient during a stress condition. The programmable patch operates in conjunction with an external programming unit for selecting the detection monitoring parameters.

A test system includes a built-in self-test (BIST) circuit and a stress applicator for use in analyzing a memory array. The stress applicator applies a selective set of stress factors to the memory array, such as temperature and voltage conditions. The BIST circuit executes a test routine on the memory array to detect the presence of any faulty memory address locations that may arise under the prevailing stress condition. A full testing cycle involves iterative repetition of the functions performed by the stress applicator and BIST circuit, with variations in the stress factors across the testing iterations. An accumulator cumulatively stores the fault information generated by the BIST circuit during each testing iteration. Following completion of the testing cycle, a repair operation is performed by a built-in self-repair (BISR) circuit to remap the faulty memory address locations indicated by the accumulator to redundant memory address locations.

An assurance system for creating and evaluating a virtual application environment that emulates and evaluates a target system. Information such as network configuration, interface information, and software packages or subsystems are imported into the virtual application environment. The assurance system may be used for purposes of testing, and delivering comprehensive reports of the likely results on the target system based on results from the virtual application environment, including such things as configuration changes to the environment, environment load and stress conditions, environment security, software installation to the environment, and environment performance levels among other things.

The invention discloses a five-axis linkage variable-axis plunge milling numerically controlled processing method for a blade part of an integral impeller. The method comprises the following steps: 1) dividing a spatial free-form surface to be processed of a part into multiple areas to be processed; 2) analyzing the stress conditions in a tooling process; 3) selecting a proper plunge milling cutter; 4) planning a processing route; 5) generating a track of a numerically controlled cutter; 6) simulating by utilizing a numerically controlled program; 7) editing the numerically controlled program; and 8) processing the part. The method is characterized in that by adopting a five-axis linkage variable-axis plunge milling manner, the processing efficiency of removing large margin by virtue of rough grooving of the integral impeller is improved, and the processing problem that finishing process with a ball cutter is required as the residual margin on a blade surface is not uniform after the plunge milling of a fixed axle of the free-form surface is solved; and the method disclosed by the invention can be applied to the five-axis numerically controlled milling processing needing to remove large-margin parts of the complicated free-form surface structures such as axial-flow type integral impellers, integral blade rings and the like as well as to the multi-axis numerically controlled milling processing of the parts of simple free-form surface structures such as centrifugal type integral impellers, mould processing and the like.

The invention relates to a method for generating images representative of the flow potential of a permeable body. The following steps are part of the disclosed method. First, providing a first sequence of digital images of the body perfused by a fluid at a rest condition. Then extracting a first quantification image of the spatial distribution of flow of the fluid in the body at the rest condition, the first quantification image being defined by pixel values. Next, providing a second sequence of digital images of the body perfused by the fluid at a stress condition. Then extracting a second quantification image of the spatial distribution of flow of the fluid in the body at the stress condition, the second quantification image being defined by pixel values. Then, combining the two quantification images to obtain an image defined by pixel values.

The invention provides a penetration and corrosion triaxial testing apparatus for gravel soil. The penetration and corrosion triaxial testing apparatus comprises a pressure control system, a penetration and corrosion triaxial testing system and a sand-water separation system, wherein the penetration and corrosion triaxial testing system is used for containing gravel soil samples and can form a penetration and corrosion environment with a multistage water head and complex stress condition through self-loaded axial pressure as well as confining pressure and water pressure, provided by a pressure supplying system; the contained gravel soil samples can flow out of the penetration and corrosion triaxial testing system in the penetration and corrosion environment and then enter the sand-water separation system. The invention also provides a testing method of the triaxial testing apparatus. According to the triaxial testing apparatus, the samples are placed in a pressure chamber with confining pressure to be saturated, so that the multistage water head can realize penetration, corrosion and strength testing under a condition that the real environment stress state is simulated; corroded particles are discharged through a porous chassis of the pressure chamber, the mass of the corroded particle can be weighed in real time after sand-soil separation, and the penetration and corrosion triaxial testing process with the multistage water head and the complex stress condition can be effectively carried out.

The invention belongs to the field of rock engineering, and in particular relates to a device and a method for a gas bearing shale-seepage-temperature coupling and displacement experiment. The experimental device comprises a triaxial pressure cavity, an axial pressure loading system, a confining pressure loading system, an upstream gas pressure loading system, an upstream liquid pressure loading system, a downstream gas pressure loading and collecting system, a downstream liquid collecting system, a multi-component mixed gas collecting system, a vacuumizing device, a heating system and a data collection control system. The experimental method comprises the following steps of: fixing a test piece; applying confining pressure; applying axial pressure; heating; vacuumizing; applying upstream liquid pressure (or pre-saturated methane); applying upstream gas pressure (or applying upstream gas pressure); injecting multi-phase mixed fluid (or applying another upstream liquid pressure); performing pre-adsorptive saturation by the test piece (injecting multi-component constant-proportion mixed gas); and collecting. The experimental device can be used for applying triaxial stress to the test piece according to the actual stress condition, and remolding a stress environment according to the fact.

A joint design particularly useful in subsea risers is disclosed. The joint is preferably of a pin and box design where one of the components is held in a stressed condition as the joint is made up and locked together. A portion of the applied stress is then removed, leaving a preload in the assembled joint. A hydraulically operated tool is used to apply the stress while at the same time supporting the riser string. The joint can seal with resilient seals or metal-to-metal contact, or both. The locking device can be of a variety of types including but not limited to breech lock, threads, or lock rings. The pin and box may be made of different materials that have different yield strengths and moduli of elasticity.

Gallium nitride material-based semiconductor structures are provided. In some embodiments, the structures include a composite substrate over which a gallium nitride material region is formed. The gallium nitride material structures may include additional features, such as strain-absorbing layers and / or transition layers, which also promote favorable stress conditions. The reduction in stresses may reduce defect formation and cracking in the gallium nitride material region, as well as reducing warpage of the overall structure. The gallium nitride material-based semiconductor structures may be used in a variety of applications such as transistors (e.g. FETs) Schottky diodes, light emitting diodes, laser diodes, SAW devices, and sensors, amongst others devices.

The invention relates to an object deformation real-time simulation graphic processing technique, particularly a soft tissue deformation simulation method based on coupling of mesh-free Galerkin and mass spring, which comprises the following steps: in the pretreatment process, establishing a linear viscoelasticity biomechanical model for soft tissues; in the deformation computation process, dynamically partitioning a mesh-free region and a mass spring region according to the load carried by the soft tissues, establishing a transitional unit of the connection region between the mesh-free region and mass spring region, and constructing a transitional unit approximation displacement function, thereby implementing self-adapting coupling of a mesh-free Galerkin method and a mass spring method;and in the after-treatment process, outputting the state of the mass or node of each time step in the deformation process onto a screen, carrying out illumination rendering, and finally displaying the real-time deformation process of the soft tissue organ under stressed conditions on the screen, thereby implementing visualization effect of dynamic deformation. By utilizing the advantage of high efficiency in the mass spring method and the advantages of high precision and no need of mesh reconstruction in the mesh-free Galerkin method, the invention overcomes the defect that the Galerkin method is not suitable for solving a large-scale problem, thereby effectively lowering the complexity of computation in the soft tissue deformation simulation and enhancing the operation efficiency.

The invention discloses a Brazilian split method for measuring an elastic parameter of a rock under an extension condition, which comprises the steps of: A. horizontally putting a machined disc-shaped sample between the load bearing plates of a press machine by using a Brazilian disc split method, placing a hard steel wire respectively between the upper load bearing plate and the sample and between the lower load bearing plate and the sample, arranging a filler strip perpendicular to the symmetrical surfaces of the sample, and applying pressure on the upper load bearing plate and the lower load bearing plate to make the sample generate tension perpendicular to the action directions of an upper load and a lower load; B. carrying out analysis by using the Hooke's law in classical elasticity mechanics by combining specific conditions of the Brazilian split method; C. analyzing the stress condition of the rock and the measurement principle in the Brazilian disc split method; and D. obtaining the strain in the stress direction according to the Hooke's law from the stress condition sigma3=0, measuring epsilon1 and epsilon2, obtaining the elastic parameter of the rock sample, and arranging a strain gauge in the center position of the rock sample for measurement of epsilon1 and epsilon2. The method has the advantages of easiness for operation and use, clear principle, low material consumption, and the like. The method is suitable for wide popularization and application.

The invention discloses a method for propagating market hogs. According to the different growth and physiological stages of the market hogs, the growth of the market hog comprises the stages of lactation and luring, weaning and stress, pigling breeding, growing development and beef gain, fodder with good nutrition, smell, and luring performance is provided in the stage of lactation and luring; fodder with diarrhea resistance and high nutrition concentration and capable of keeping the healthy of intestinal tract is provided in the stage of weaning and stress; fodder capable of strengthening immunity, promoting growth and exercising the intestinal tract is provided in the pigling breeding; fodder for increasing nutrition and protein synthesis is provided in the stage of growing development;the fodder with high energy and high amino acid is provided in the beef gain. According to the method, the fodder is schemed according to the physiology and development stage and the stress conditions; the method has the advantages of low mortality, quick growth speed, short propagation period, low feed conversion ratio, high weight and the like; in addition, the propagation cost of the market hog is lowered, and the economic benefits of propagating market hog are improved.

The invention relates to a soft tissue deformation simulation method based on smooth particle hydrodynamics, belonging to the technical field of graphic processing. In the method, a smooth particle hydrodynamics method is selected, and a viscoelastic mechanics model is used for reflecting the biomechanical characteristics of soft tissue. The method comprises the following steps of: constructing a series of equations related to soft tissue deformation simulation according to the viscoelastic model; selecting a proper support domain search strategy and a smooth kernel function, approximately calculating each related item of the equation by adopting the particle approximation method, and calculating the variation values of the density, the position, the velocity and the like of each particle along with time through the display integration method; and dynamically outputting the status of each time step size of the particle model to a screen, rendering texture irradiation, and displaying the real-time deformation process of soft tissues and organs under stressing conditions. The method does not need troublesome grid computing, thereby increasing the accuracy and the real-time performance of soft tissue deformation simulation.

The invention discloses a device for simultaneously measuring expansion and permeability rate of gas injected into a coal rock under a tri-axial stress condition. The device comprises a gas injection system (1), a confining pressure system (2), an axial pressure loading machine (25), a permeability measuring system (3) and a data acquisition system (4), wherein the gas outlet port of the gas injection system (1) is connected with the gas inlet port of the confining pressure system (2) through a high pressure gas inlet pipe (43); the axial pressure loading machine (25) is arranged at the external part of the confining pressure system (2); the permeability measuring system (3) is connected with the gas outlet port of the confining pressure system (2) through a high pressure gas pipe; and the data acquisition system (4) is connected with the confining pressure system (2) through a data line with a sensor. According to the device provided by the invention, the problem of measuring coal-body deformations and permeability variations of different adsorption gases at different temperatures and different pressures is effectively solved; in addition, the permeability and coal-body change laws caused by a gas injection displacement in the process of developing coal bed gases are effectively simulated so that the production practice is beneficial to be further guided.

The invention relates to a pavement structure and a testing device for bridge deck pavement bonding interface shearing-resistance characteristic, which are based on mechanics principle and indoor test, effectively simulate road surface and simulate stress conditions, can realize continuous change with 0-80 degrees of shearing angle, meet needs of different working conditions and are suitable for the design and research of the pavement structure, the indoor test and engineering test. The testing device comprises an upper part and a lower part, each part comprises a bearing board, a rolling shaft, an arc base, a semi-circular clamp, an internal collet and a clamp fixing device. The whole device also comprises an angle dial scale and an angle pointer and other attached parts which are used for indicating the size of the angle. A square testing piece is arranged in the internal collet, the semi-circular clamp and the base can rotate relatively, after the shearing angle is set, the clamp and the base are fixed by the clamp fixing device. The horizontal surface of the other side of the base is contacted with the bearing board in a rolling way by the rolling shaft, so as to lead the device loading to generate vertical displacement and to move horizontally at the same time.

A method and apparatus for determining whether an integrated circuit has been subjected to stress conditions during operation. The integrated circuit comprises a test device that is exposed to the same power supply voltage and temperature as other devices in the integrated circuit. Certain expected operating parameters, as a function of the operating life of the integrated circuit, are predetermined. If a measured value of the operating parameter exceeds the expected value then the integrated circuit has been subjected to stress conditions.

The invention relates to a directional-freezing heat-proof corrosion-resistant nickel base cast superalloy with low cost and excellent performance. The cast superalloy has the chemical composition range by weight percentage as follows: C is 0.04 to 0.09; Cr is 14.5 to 15.3; Co is 9.0 to 9.9; W is 4.7 to 5.9; Mo is 1.6 to 2.3; Al is 2.8 to 3.3; Ti is 4.2 to 5.0; Hf is 0.3 to 0.6; Ta is 0.3 to 1.5; B is 0.06 to 0.10; Y (adding quantity) is 0.015; Mn is less than or equals to 0.2; Si is less than or equals to 0.2; P is less than or equals to 0.008; S is less than or equals to 0.008; Fe is less than or equals to 0.5; the other weight percentage is composed of Ni. A vacuum induction furnace is adopted to smelt master alloy, and the directional-freezing is performed in a liquid-metal-cooled (LMC) furnace to prepare columnar grain alloy; the vacuum degree of a directional furnace is less than or equals to 5*10<-4>mmHg, the casting temperature ranges from 1480 to 1570 DEG C, the drawing velocity is 3 to 15mm / min, the temperature gradient is 95 to 145 DEG C / cm, and the temperature of melting tin ranges from 250 to 350 DEG C. The invention provides the heat-proof corrosion-resistant superalloy, which contains Ta, does not contain alloying elements that are Re (with low cost), Nb, Zr and Ce, and has a stable microstructure. Compared with cheC88 Y-BN, the tensile-strength (using Delta (b) and Delta0.2 to represent) is increased more than 30 percent, the plasticity is improved obviously, the lasting temperature is risen by 30 DEG C under the same stress condition, and the cast superalloy is applied to manufacture turbine blades of a combustion turbine which is used under 930 DEG C.

A two step thin film deposition process is disclosed to provide for the simultaneous achievement of controlled stress and the achievement of preferred crystalline orientation in sputter-deposited thin films. In a preferred embodiment, a first relatively short deposition step is performed without substrate bias to establish the crystalline orientation of the deposited film followed by a second, typically relatively longer deposition step with an applied rf bias to provide for low or no stress conditions in the growing film. Sputter deposition without substrate bias has been found to provide good crystal orientation and can be influenced through the crystalline orientation of the underlying layers and through the introduction of intentionally oriented seed layers to promote preferred crystalline orientation. Conversely, sputter deposition with substrate bias has been found to provide a means for producing stress control in growing films.

The invention discloses a three-dimensional similarity simulation test method including the steps: A, test-piece preparation; B, loading; and C, excavation and observation. By the method, complex distribution phenomena of coal bed stress in different roof movement phases during underground excavation can be simulated, and large-inclination-angle ore bed test pieces can be manufactured more conveniently and effectively, so that rock masses can be guaranteed to be under the three-directional stress condition in the whole excavation process, underground space excavation under more working conditions can be studied, the height on the earth surface of a whole system is decreased, construction cost is lower, and the system is more stable.

The invention relates to a testing machine for simulating the fatigue life in a full scale mode in the marine environment of a harbor pipeline, and the testing machine belongs to the technical fields of new pipeline material development and structure design and mechanics performance testing, wherein two guide rail beams are fixedly connected with a workbench; two movable supports are respectively in sliding connection with the guide rail beams; two servo loading units are respectively in sliding connection with the guide rail beams; and an internal pressure loading unit is fixedly connected with the workbench. The testing machine provided by the invention has the advantages that the performance of the harbor pipeline is comprehensively and reliably analyzed; the loading type of any combination is realized; the mechanics performance, welding performance, fatigue life and the like of the pipeline are tested more comprehensively and more accurately by simulating the stress conditions of the harbor pipeline in a full-scale and full-direction mode; and the testing machine has important significance in effectively preventing the harbor pipeline from fracturing.