32 results about "Stimulation tests" patented technology

A tissue stimulation device includes an electrode array having at least four independently switchable electrodes. In one embodiment, the electrode array comprises a flexible base to which the electrodes are fixed that flexes to encompass at least a portion of an artery or other elongate biological structure. The electrodes are electrically coupled to and energized by a signal generator coupled to a control system. In one embodiment, the array of electrodes are configured such that a suitable signal pattern for stimulation pulses between or among a set of the switchable electrodes may be determined without having to reposition the electrode assembly by using a series of signal patterns activating different combinations of switchable electrodes in response to sub-stimulation test signals to determine a signal pattern that provides suitable patient response. In another embodiment, the array of electrodes includes an array of selectively activatable multi-polar electrodes.

The invention provides a large-scale multifunctional corrosion stimulation test rack taking a test circular road as a main part, which is used for simulating the corrosion condition of high acid natural gas containing H2S, CO2 and Cl on a pipeline parent metal and a welded joint under the pipeline transmission condition. The device and the method provided by the invention can be applied to pipeline parent bodies with different pipe diameters, materials, steel grades and wall thicknesses, or a welded joint corrosion test; and test functions such as test on corrosion of the pipe section parent metal and the welded joint, sulfide stress cracking (SSC), hydrogen induced cracking (HIC), washout, corrosion inhibitor effect, welding process evaluation, corrosion monitoring method comparison, pipeline-corrosion-preventing process optimization and the like are integrated into a whole; and the test functions, such as preference of the corrosion process in the pipeline are integrated into a whole, thus reasonable material selection and safe welding quality are guaranteed, and the corrosion condition of the corresponding corrosion condition on the welded joint and the parent metal is known.

The invention discloses a method for simulating faults of a power transformer. According to a current mode and method for simulating the internal faults of the transformer, a returned transformer is commonly utilized to conduct fault simulation tests, or the fault stimulation tests are directly conducted in oil in the transformer, workload is large, fault modules need to be frequently replaced, and the simulation effect is poor. According to the method for simulating the faults of the power transformer, an electric power simulation transformer structure and a transformer fault model are used as the foundation, generation, disappearance and intensifying of transformer partial discharge faults and winding deformation faults are directly controlled outside a transformer body through an external regulation control method, and regulation can be safely conducted in the boosting process. By the adoption of the method for simulating the faults of the power transformer, the trouble of replacing the fault model in the fault simulating process is avoided, generation time and intensity of the faults in the boosting process can be conveniently regulated and controlled, and the method is accurate and efficient.

The invention discloses a multifunctional rut testing instrument, and relates to a rut testing instrument. The provided multifunctional rut testing instrument solves the problem that the conventional rut stimulation testing devices cannot obtain the data that is most approximate to the actual data under comprehensive conditions. The rut testing instrument is composed of a testing box, an industrial computer, and a control table; a rut testing assembly, an ultraviolet lamp, a spraying nozzle, a refrigerator, a heater, a temperature sensor, an oxygen gas jet pipe, a nitrogen gas jet pipe, and an oxygen gas concentration sensor are arranged in the testing box, the industrial computer controls the rut testing assembly through program software, and the control table is used to control the switch of the ultraviolet lamp, the spraying of the spraying nozzle, the temperature, and the oxygen gas concentration. The provided multifunctional rut testing instrument can carry out stimulation tests under comprehensive environment with different sunlight strengths, rain water amounts, temperature ranges, and oxygen gas concentrations so as to obtain the asphalt road surface aging situation data, which is closest to the actual data, under the comprehensive conditions. The test results have a good adaptability, and thus the testing instrument is very helpful for the researches on the aging rules of asphalt road surface.

A multifunctional load stimulation test stand comprises a base, a load steering engine, a load steering engine fixing lug base, a load steering engine front-and-back position adjusting wedge block, a load steering engine left-and-right position adjusting block, a pull pressure sensor, a connecting flange, a load steering lug ring shaft, a middle inertia block, a measured steering engine output shaft, a measured steering engine, a measured steering engine installing plate, a rack, a gear, a gear shaft, a gear shaft support, a rolling bearing, a middle bracket, an inertia disc, an anti-rotation cross, a threaded end cap, a lateral force prevention guide wheel, a load steering engine output shaft, an adaptor, a dowel, a guide wheel baffle, a gear shaft support bearing, a load steering engine left-and-right position adjusting screw and a measured steering engine lug ring shaft. By the adoption of the test stand, the performance of the measured steering engine is accurately and reliably tested through the simplest structure and operation most convenient to conduct and at lowest using cost. The multifunctional load stimulation test stand has the advantages of being convenient to demount and mount and high in universality of an installing conversion structure, and can also be suitable for other equipment needing loading.

A tissue stimulation device includes an electrode array having at least four independently switchable electrodes. In one embodiment, the electrode array comprises a flexible base to which the electrodes are fixed that flexes to encompass at least a portion of an artery or other elongate biological structure. The electrodes are electrically coupled to and energized by a signal generator coupled to a control system. In one embodiment, the array of electrodes are configured such that a suitable signal pattern for stimulation pulses between or among a set of the switchable electrodes may be determined without having to reposition the electrode assembly by using a series of signal patterns activating different combinations of switchable electrodes in response to sub-stimulation test signals to determine a signal pattern that provides suitable patient response. In another embodiment, the array of electrodes includes an array of selectively activatable multi-polar electrodes.

The invention provides a preparation method of simulation stress corrosion cracks for eddy current testing. The method comprises the following steps: processing a flat plate test piece and leading in fatigue cracks with same size to real stress corrosion cracks ; obtaining a fatigue crack flat plate test piece; utilizing a four-point bending on-line loading device to conduct bending loading on the fatigue crack flat plate test piece to enable the fatigue crack to close opening; conducting eddy current testing experiment at the same time; acquiring eddy current detection signals under different loading states, wherein the closed-opening fatigue cracks under the loading state anastomotic to the real stress corrosion crack eddy current testing signals are equivalent to real stress corrosion cracks in eddy current testing meaning, and can be taken as the simulation cracks of the stress corrosion cracks. The stimulation test piece prepared according to the method can effectively replace stress corrosion crack test pieces which are complex in actual shapes and difficult to prepare, has the advantages that the simulation test piece is simple to operate, easy to realize, low in cost, and known in size of cracks, and can be extensively applied to a testing capability certification system of the stress corrosion crack quantitative eddy current testing method.

The invention discloses a method for performing stimulation test on the stress of a glass fiber reinforced plastic (GFRP) pipe steel reinforced high-strength concrete eccentric loading column, and relates to a method for testing a building member. The method is characterized by comprising the steps of: analyzing the whole stress process under the action of an eccentric compressive load; establishing a bearing capacity calculation program of the GFRP pipe steel reinforced high-strength concrete eccentric loading column on the basis of a finite strip method with assumed plane sections; and calculating to obtain a load and deformation relation curve and a curve of the influence of the concrete strength, slenderness ratio, eccentricity and steel ratio on load-deformation by using the program, and performing test analysis. The test analysis shows that: the ultimate bearing capacity of a member is decreased along with the increase of the slenderness ratio, the elastic stage of a member curve is gradually shortened, and the rigidity is gradually lost; the ultimate bearing capacity of the member is decreased along with the increase of the eccentricity; the ductility of the member is improved; and the ultimate bearing capacity of the member is improved along with the improvement of the strength of concrete. In the method, a test analysis result and a test result are consistent, and a basis is provided for the actual design.

The invention discloses a skin care composition with the effect of soothing sensitive skin. The skin care composition is mainly prepared from the following components in percentage by mass: 0.1 to 10%of water solution of skin repair factor, 0.01 to 1% of coolant, 0.01 to 1% of free radical clearing agent, 0.1 to 10% of plant extract, and 80 to 95% of matrix, wherein the plant extract is mainly prepared from the following raw materials in parts by weight: 0.1 to 10 parts of fructus cnidii, 0.1 to 10 parts of pericarpium zanthoxyli, 0.1 to 10 parts of viscum album, 0.1 to 10 parts of bergenia crassifolia, and 0.1 to 10 parts of freesia armstrongii. The skin care composition has the advantages that the mild and easing components are selected; by utilizing the multiple effects of cooling, diminishing inflammation, and repairing skin barrier, the skin immunity is enhanced; found by erythrocyte stimulation test and volunteer test, the sensitivity of skin cells is obviously decreased, and the good sensitive skin soothing function is realized.

The invention belongs to the technical field of steel wire rope application and particularly discloses a bitumen-impregnated type composite steel wire rope for a railway and a production method thereof. The bitumen-impregnated type composite steel wire rope is composed of a center strand, twelve inner layer strands and twelve outer layer strands, wherein the inner layer strands are arranged on the periphery of the center strand and arranged with the center strand in a dodecagon shape, and the outer layer strands are arranged on the periphery of the inner layer strands and arranged with the inner layer strands in a dodecagon shape. The center stand makes point contact with the inner layer strands, and the inner layer strands make point contact with the outer layer strands. The bitumen-impregnated type composite steel wire rope is simple in structure, low in production cost, high in extension strength, fatigue resistance, corrosion resistance and abrasive resistance and long in service life; through repeated calculation, tests, designs and stimulation tests, the high-strength and high-fatigue-resistance steel wire rope special for the electric railway is produced; compared with a conventional steel wire rope, the filling coefficient is high, contact layer steel wires are thickened, and therefore the steel wire rope has the advantages of being high in strength, fatigue resistance and conductive performance.

The invention provides a composite vitamin for injection and a preparation method thereof, in particular to a composite vitamin (4) refrigerating and drying preparation for injection, which contains vitamin A palmitate, vitamin D2, vitamin E, vitamin K1, tween-80, a stabilizing agent, a proppant, and a pH regulator. Products prepared by the formulation composition and the preparation process have good appearance, fine freeze crystal, short redissolution time and good stabilization. The hemolysis test, rabbit marginal vein infusion stimulation test, systemic anaphylaxis test of the composite vitamin (4) for injection all meet the safety requirements of injecting.

The invention relates to a self-elevating drilling platform pitching pile simulation test loading device and method. The self-elevating drilling platform pitching pile simulation test loading device comprises a loading steel frame used for being fixedly connected with the upper part of pile legs of a test simulation self-elevating platform and a plurality of ballast water tanks of the same volume. The multiple ballast water tanks are fixedly and hierarchically arranged on the loading steel frame from top to bottom in the height direction of the loading steel frame. The ballast water tanks on the same layer are symmetrically distributed on the two sides of the same elevation position of the loading steel frame. The ballast water tanks of the adjacent upper and lower layers are perpendicularly arranged at two different elevation positions of the loading steel frame in a staggered mode. According to the self-elevating drilling platform pitching pile simulation test loading device, the water tanks are evenly installed at the different positions of the pile legs used for a stimulation test, seawater or other fluid mediums of high density are pumped into the water tanks through a water pump according to different pumping speeds, dressing-capping-type splitting loading is conducted, a self-elevating drilling platform can be stimulated to complete preballasting operation be relying on ballast tank water taking-in well, and the high similarity is achieved.

The invention provides a five-axis linkage numerical control simulation test device, and belongs to a mechanical device. The five-axis linkage numerical control simulation test device mainly solves the problems of structure and function design and is composed of a machine base, a rotating table, a longitudinal motor, a longitudinal lead screw, a longitudinal polished rod guide rail, a longitudinal sliding block, a transverse sliding block, a transverse polished rod guide rail, a transverse lead screw, a spindle motor, a lifting motor, a transverse motor and a spindle. The five-axis linkage numerical control simulation test device is characterized in that the rotating table is installed on the upper end face of the longitudinal sliding block and can move along the longitudinal polished rod guide rail under the drive of the longitudinal motor and the longitudinal lead screw, the spindle is installed below the transverse sliding block and can move along the transverse polished rod guide rail under the drive of the transverse motor and the transverse lead screw, the spindle is driven by the spindle motor to rotate and conducts perpendicular feeding motion under the action of the lifting motor at the same time, and then the five-axis linkage stimulation process is achieved. The five-axis linkage numerical control stimulation test device has the advantages of being controllable, adjustable, convenient to operate, simple in structure and long in service life.

The invention discloses a load simulation testing device for a rudder system. The load simulation testing device comprises a torque sensor, a torque device and a first torsion rod spring, wherein thetorque sensor is used for measuring the torque of a rudder actuator; the torque device is used for providing load for the rudder actuator in a non-linear load mode and an inertia load mode; the firsttorsion rod spring is used for providing load for the rudder actuator in an elastic load mode, and in the elastic load mode, one end of the first torsion rod spring is connected to the rudder actuator, and the other end of the first torsion rod spring is arranged fixedly. In the testing device, through the arrangement of the torque sensor, the torque device and the first torsion rod spring, the stimulation testing for the rudder system in different load modes can be realized, and the device is simple in structure and convenient to operate.

The invention discloses a method for detecting and evaluating conjunctival irritation and mucous membrane irritation by using chicken embryo vascular system, comprising the following steps: (1) preparation of chorioallantoic membrane; (2) conjunctival irritation test; (3) sticking mold Stimulation test; (4) prediction model and classification, the present invention uses the standardized chicken embryo as the test system, and its vascular system at different stages of development is similar to the human eye conjunctiva and oral submucosa tissue, and the chicken embryo has a high degree of standardization, stable source and batch The difference between blood vessels is small, the vascular system has biological activity and function, the test system is simple and cheap, no special equipment is required, and the detection method is fast, sensitive and universal. The invention can detect and evaluate the conjunctival irritation and mucous membrane irritation of the substance to be tested from both qualitative and quantitative aspects. The method of the present invention can also replace living animals and human volunteers, and be directly used for the detection of conjunctival irritation and mucosal irritation of substances such as chemicals or cosmetics, and rapid screening, classification and identification thereof.

The invention relates to a position evaluation apparatus of testing a stimulation electrode. The position evaluation apparatus is an electric pulse stimulation test apparatus and the apparatus comprises an external program control instrument and a test lead. The external program control instrument comprises a pulse generation module used for generating an electrical stimulation pulse signal. The test lead is used for connecting the external program control instrument to a stimulation electrode. The external program control instrument also comprises an electrophysiological signal acquisition module, a storage module and an electrophysiological signal comparison module, wherein the electrophysiological signal acquisition module is used for controlling the stimulation electrode so as to collect electrophysiological signals of a human body; the storage module is used for storing the electrophysiological signals collected by the electrophysiological signal acquisition module; the electrophysiological signal comparison module is used for comparing the different electrophysiological signals. By using the position evaluation apparatus of testing the stimulation electrode, during an operation process, a position offset condition of the stimulation electrode before and after being fixed can be timely and effectively evaluated and tested.

The invention provides a simulate fracture-cavity type carbonate reservoir huff and puff test device and method. The device comprises a core huff and puff device, and the core huff and puff device is connected with a gas piston container, a crude oil piston container and a formation water piston container. The method comprises a preparatory stage, a medium injection stage and a fluid puffing stage. By means of the simulate fracture-cavity type carbonate reservoir huff and puff test device and method, the huff and puff condition of a fracture-cavity type carbonate reservoir under the formation condition can be simulated.

The invention relates to a multi-stimulation identification method for a multivariable linear continuous system. The multi-stimulation identification method comprises the following steps: carrying out model identification on a multivariable linear continuous system with m-dimensional inputs; supposing that m groups of identification stimulation tests are carried out and the dimension of each group of the tests is m, forming an m*m-dimensional stimulation signal matrix by virtue of m groups of stimulation signals, wherein when the rank of the matrix is m (namely identifying that the identified stimulation signal matrix is full rank and an inverse matrix exists), a system model can be effectively identified under the action of the identified stimulation signal matrix, otherwise, the identified system model is invalid. According to the multi-stimulation identification method, guiding rules are provided for the stimulation signal design of multivariable system identification tests and the multivariable system identification.

The invention discloses a flexible simulation test method and system of a pitch system. The flexible simulation test method comprises the following steps of stimulating a main control system of the pitch system to be tested; stimulating the external work conditions of the pitch system to be tested; setting the transmission chain reduction ratio of a variable pitch hub for the pitch system to be tested according to a fan model; testing the internal operation conditions of the pitch system to be tested based on the stimulated main control system and external work conditions; obtaining operation data of the pitch system to be tested. According to the flexible simulation test method and system of the pitch system, full-work-condition stimulation tests under different transmission chain reduction ratios can be performed on the pitch system.

The invention discloses a practical simulation test system for the full-station system of a digital intelligent transformer substation, and in particular relates to a digital transformer station control system with the core based on IEC61850 standard, comprising three layers, i.e., a course layer, an interlayer and a transformer station layer, wherein protective equipment, measurement and control equipment, metering equipment and other equipment are located in the spacing layer, information can be interchanged between the spacing layer and the course layer through sampling values mapped by specified communication services and object-oriented transformer station events, information interchange is completed according to service of IEC61850 standard, the digital transformer station control system with the core based on IEC61850 standard is connected with a compatible practical stimulation test system, and the practical simulation test system takes a stimulation test mainframe as a basis, takes a multipath digital analogue simulation comprehensive test device as the core, and comprises digital record and stimulation correction equipment, network analysis equipment, a wireless transceiver, a small semaphore test unit and a network switch which are on the basis of IEC61850 communication protocol.

The invention discloses a pen pressure stimulation test device, which includes a bracket; a pen pressure module, which can be installed on the bracket and can move along the vertical direction to approach or leave the below moving platform, and the pen pressure module is configured to an accommodated test pen and specified pressure is produced by a pen point of the accommodated test pen on papersto be tested which are placed on the moving platform; the moving platform is installed on the bracket, the papers to be tested are placed and fixed on the moving platform, and the moving platform is configured to moving along the X direction and the Y direction of a horizontal plane under the driving of a motor; the motor is configured to driving the moving platform to move along the X direction and the Y direction of the horizontal plane; a control unit, which is configured to controlling operation of the motor to drive the moving platform to move along the X direction and the Y direction ofthe horizontal plane.

The invention discloses a method for simulating faults of a power transformer. According to a current mode and method for simulating the internal faults of the transformer, a returned transformer is commonly utilized to conduct fault simulation tests, or the fault stimulation tests are directly conducted in oil in the transformer, workload is large, fault modules need to be frequently replaced, and the simulation effect is poor. According to the method for simulating the faults of the power transformer, an electric power simulation transformer structure and a transformer fault model are used as the foundation, generation, disappearance and intensifying of transformer partial discharge faults and winding deformation faults are directly controlled outside a transformer body through an external regulation control method, and regulation can be safely conducted in the boosting process. By the adoption of the method for simulating the faults of the power transformer, the trouble of replacing the fault model in the fault simulating process is avoided, generation time and intensity of the faults in the boosting process can be conveniently regulated and controlled, and the method is accurate and efficient.

The invention discloses a pressure stimulation testing device, system and method. The system mainly comprises a pressure stimulation testing device, a PC control system, a PLC and a stepper motor drive; the pressure stimulation testing device comprises a force applying component and a force measuring component arranged with the force applying component coaxially. The control system controls the pressure stimulation testing device automatically, the pressure can be controlled to apply accurately, and feedback regulation and secondary compensation are performed according to pressure measurement signals through actual feedback; the testing pressure result of the pressure stimulation test is guaranteed being accurate and actual, the actual and accurate test results can be provided, and the test requirements are met.

The invention relates to a position evaluation apparatus of testing a stimulation electrode. The position evaluation apparatus is an electric pulse stimulation test apparatus and the apparatus comprises an external program control instrument and a test lead. The external program control instrument comprises a pulse generation module used for generating an electrical stimulation pulse signal. The test lead is used for connecting the external program control instrument to a stimulation electrode. The external program control instrument also comprises an electrophysiological signal acquisition module, a storage module and an electrophysiological signal comparison module, wherein the electrophysiological signal acquisition module is used for controlling the stimulation electrode so as to collect electrophysiological signals of a human body; the storage module is used for storing the electrophysiological signals collected by the electrophysiological signal acquisition module; the electrophysiological signal comparison module is used for comparing the different electrophysiological signals. By using the position evaluation apparatus of testing the stimulation electrode, during an operation process, a position offset condition of the stimulation electrode before and after being fixed can be timely and effectively evaluated and tested.

The present invention relates to a screening method for diagnosing growth hormone deficiency in pediatric patients by using maxirelin. The present invention further provides the substance maxirelin for use in the diagnosis of growth hormone deficiency in pediatric patients. The method includes providing at least one blood sample collected from a subject within a range of about 15 to about 100 minutes after administration of maxirelin in an amount effective to induce secretion of growth hormone, measuring a growth hormone level for each blood sample, comparing the measured growth hormone levels to a single threshold, and determining whether the measured growth hormone levels are different from the single threshold. And diagnosing whether the subject has growth hormone deficiency based on a comparison of the growth hormone level in the at least one blood sample to the single threshold. The method of the invention is a stand-alone test, does not require repetition, and does not require additional growth hormone stimulation tests for reliable diagnosis of pediatric patients.

The invention discloses an electrical stimulation model for superior sagittal sinus of a rat and an establishment method. The electrical stimulation model comprises a rat skull and an electrode stimulation assembly, wherein stimulation holes are formed in front of and behind an intersection between the midline of the rat skull and a coronal suture; the electrode stimulation assembly comprises a front electrode, a back electrode, two wires and one electrode connecting port; the front electrode is connected with the electrode connecting port through one wire, and the back electrode is connected with the electrode connecting port through the other wire; the front electrode is implanted in the stimulation hole in front of the intersection; the back electrode is implanted in the stimulation hole behind the intersection. With adoption of the electrical stimulation model for the superior sagittal sinus of the rat and the establishment method, one specific and effective electrical stimulation model is established, and reliable model basis is provided for stimulation tests on skull dura mater of the rat.

The invention provides a ganciclovir composition freeze-dried powder for injection, and belongs to the field of medicine and medicine preparation technology. The ganciclovir composition freeze-dried powder comprises following raw material ingredients, by weight, 7.26 to 9.17 parts of ganciclovir, 5.15 to 6.56 parts of chitosan nanoparticle, and 80.34 to 87.10 parts of injection water. Advantages of the ganciclovir composition freeze-dried powder are that: 1) toxic effect of the ganciclovir composition freeze-dried powder on cells is reduced; 2) the ganciclovir composition freeze-dried powder is capable of avoiding phagocytosis of mononuclear macrophage on ganciclovir, contact area of ganciclovir with action sites is enlarged, and per unit area medicine concentration is increased; 3) human cytomegalovirus resistance is increased significantly, and medication cycle of patients is shortened, so that occurrence likelihood of adverse drug reaction caused by accumulation of ganciclovir is reduced; 4) no hemolysis, agglutination reaction, stimulus response or anaphylactic reaction is observed in special safety tests such as allergic test, hemolytic test and vascular stimulation test; 5) the chitosan nanoparticle is used as a freeze-dried skeleton agent of the freeze-dried powder injection instead of mannitol, so that active effects of mannitol on human bodies are avoided.

The invention relates to a flow falling dust raising simulation test device. The flow falling dust raising simulation test device comprises a high-position flow falling assembly, a material guide device, a low-position smoothing assembly and a weighing device. The flow falling dust raising stimulation test device is equipped with the weighing device for reflecting mass changes of to-be-detected materials in a material receiving device, and can be used for quickly calculating the mass changes of the to-be-detected materials at the beginning and ending of simulation, so that the practical loss condition of the materials in the falling process can be completely and objectively reflected, and further, the flow falling dust raising effect of a coal yard is conveniently evaluated and analyzed. The flow falling dust raising simulation test device disclosed by the invention is simple in structure, convenient to use, stable in performance, strong in practicability and capable of being used for flow falling dust raising test occasions of other powder in addition to being used for the flow falling dust raising test of pulverized coal materials. Besides, the flow falling dust raising simulation test device disclosed by the invention further can be used for regulating different heights for a high-position conveying device, so that the flow falling dust raising simulation test can be carried out at different heights.