167 results about "Proficiency testing" patented technology

A modular test chassis for use in testing wireless devices includes a backplane and a channel emulation module coupled to the backplane. The channel emulation module comprises circuitry for emulating the effects of a dynamic physical environment (including air, interfering signals, interfering structures, movement, etc.) on signals in the transmission channel shared by the first and second device. Different channel emulation modules may be included in the test system depending upon the protocol, network topology or capability under test. A test module may be provided to generate traffic at multiple interfaces of SISO or MIMO DUTs to enable thorough testing of device and system behavior in the presence of emulated network traffic and fault conditions. A latency measurement system and method applies timestamps frames as they are transmit and received at the test module for improved latency measurement accuracy.

An audio-acoustic proficiency test method transduces, captures, measures, compares, analyzes, records, and reports on the actual performance of at least one performer's produced orderly sound sequence (pitch and rhythm). It also issues proficiency performance certificates, certified copies of the audio-acoustic performance, performance growth and statistics, or player rewards in game modes, lessons or practice scheduling and training through a transport means selected from the group of the Internet, television, and a computer network. The apparatus comprises a performer or sound generation source, transducer, central processing unit, random access memory, archival storage unit, output printer, user display and user input devices.

In a system for providing media content to a communication device, a device capabilities determination is made by a rules engine that compares content attributes with constraints on those attributes for a device. Metadata describing the content is derived and entered into a database. As the specifications of different devices are entered into the system, corresponding constraints are associated with the devices that tell the engine the valid range of values for the content attributes. The engine creates an available content library for each class of devices by excluding all instances of content that have attributes outside the range of values prescribed in the constraints. A similar rule set determines whether the content can be distributed through a particular delivery channel, based on the distribution channel capacity to support a media type. The subset of content that passes both the device capabilities tests and the distribution capability tests is viable for delivery to a device over a particular distribution channel.

Capability test programs are generated implementing the capability test test cases for the components, wherein component developers use the capability test programs to test components during the development and coding of the components. Documentation is generated describing component abstract test cases incorporating information on capability test test cases. Component test programs are generated implementing the component abstract test cases for the components and utilizing capability test programs, wherein each component test program tests one component for at least one test case specified in the component abstract test case documentation for the component. The capability test programs and component test programs are stored in a shared repository. A software development program is deployed to enable the developers and testers to execute groups of component test programs in the shared repository to test the components during different phases of the development of the software product.

The invention relates to a visual simulation shale micro-crack plugging capacity test system and a visual simulation shale micro-crack plugging capacity test method. Displacement evaluation experiment is performed on a single or combined micro-crack rock sample by a solution or a drilling fluid which contains the plugging agents with different concentrations and different types at different experiment conditions, such as pressure differences and times, indexes, such as the invasion depth, are compared, the formation conditions of inner mud cakes in drilling are directly described, and microscopic observation and analysis are performed on percolation substances invade into the micro-cracks by utilizing amplification imaging instruments, such as a high-definition microscope, so that the plugging mechanisms and the effects of various drilling fluid plugging agents and drilling fluids are analyzed and researched intuitively and microscopically, a proper drilling fluid plugging agent is selected preferably, a drilling fluid system formula is optimized, the problem about the experimental conditions that the visual simulation evaluation cannot be performed on shale micro-crack plugging in the past is solved, and a new evaluation experimental research means is provided for related research and production in the technical field of fractured shale strata borehole wall stability in petroleum engineering.

The invention discloses an optimizing method for parameters of a hydraulic fracturing proppant for a sandstone reservoir. The optimizing method comprises the following steps: inputting wellbore data and the like of the sandstone reservoir to be fractured into oil and gas reservoir capacity simulating software, simulating and calculating the reservoir capacity under different fracture parameters todetermine the optimal fracture flow conductivity required by the production of the reservoir; splitting by adopting a real rock plate of a reservoir to form a fracture, acquiring surface rough topographic data of the fracture, then manufacturing a sample preparation mould which is consistent with that the surface rough topographic data, and manufacturing an artificial sandstone rock sample with real fracture surface topography; performing a propped fracture flow conductivity test under different proppant parameters by adopting the artificial sandstone rock sample, and performing comparison analysis on a test result with a simulated calculation result to obtain an optimal proppant parameter which is in accordance with the characteristics of the reservoir. According to the optimizing methodfor the parameters of the hydraulic fracturing proppant for the sandstone reservoir, proppant parameter optimization results can be acquired efficiently and accurately by performing the propped fracture flow conductivity test through adopting the artificial sandstone rock sample which can reflect hydraulic fracturing real fracture surface topography of the sandstone reservoir.

Enhancing access for physically impaired users to selectable items in a hierarchical arrangement through the preliminary testing of a user response time in moving a user controlled on-screen pointer from a start point over an equal distance to each of a plurality of said selectable items of different sizes in combination with implements responsive to this preliminary testing means for sizing a set of items in said hierarchical arrangement to provide said user with enhanced access to said items in said set.Access for the physically impaired is even further enhanced through preliminary testing of a user response time in moving a user controlled on-screen pointer from a start point over an equal distance to each of a plurality of said selectable items wherein each item is located within a region of different item layout spacing, in combination with an implement responsive to said preliminary testing means for spacing a set of items in said hierarchical arrangement to provide said user with enhanced access to said items in said set.There is a further provision for listening for predetermined events in the operation of said display system and means responsive to said predetermined events for triggering said means for preliminary testing during said system operation. Likewise, there are means for listening for predetermined events in the operation of said display system in combination with means responsive to said predetermined events for triggering said means for preliminary testing during said system operation.

The invention discloses a detection device and a detection method for a station-dedicated DC power system insulation monitoring device. The detection device comprises a DC power unit, an auxiliary DC power unit, and an AC power unit, wherein the DC power unit comprises a first rectifying voltage-regulating module SDC1 and a DC busbar KM1; the auxiliary DC power unit comprises a second rectifying voltage-regulating module SDC2 and an auxiliary DC busbar KM2; the AC power unit comprises an AC voltage regulator T1 and a change-over switch S2; the detection device further comprises a ground insulation testing unit, and a waveform measuring and recording, AC jump and control protection circuit. The detection device has the benefits as follows: mutual jump alarm test, ring network alarm test, AC jump alarm test, balanced bridge AC superimposition resistance test, insulation resistance monitoring, grounding line selection correctness test and other function and performance detection or tests and verifications for the station-dedicated DC power system insulation monitoring device are realized, so as to prevent the improper DC power supply insulation monitoring device from influencing the safe production of a power system.

An audio-acoustic proficiency test method transduces, captures, measures, compares, analyzes, records, and reports on the actual performance of at least one performer's produced orderly sound sequence (pitch and rhythm). It also issues proficiency performance certificates, certified copies of the audio-acoustic performance, performance growth and statistics, or player rewards in game modes, lessons or practice scheduling and training through a transport means selected from the group of the Internet, television, and a computer network. The apparatus comprises a performer or sound generation source, transducer, central processing unit, random access memory, archival storage unit, output printer, user display and user input devices.

The invention discloses a proficiency testing sample for measuring the color fastness to perspiration of a textile and a preparation method of the sample. The proficiency testing sample is formed by dyeing a piece of pure cotton weaving tabby bleaching grey cloth by adopting an active dye or a direct dye, the detection result of the color fastness to acidic perspiration (which comprises an original sample discoloration level number, a cotton lining staining level number and a wool lining staining level number) is within 2 level-5 level and contains the daily detection range of the color fastness to acidic perspiration in the field of existing textile clothing, and the proficiency assessment of the detection items of different laboratories or the quality control usage of the laboratories can be realized. The preparation method of the proficiency testing sample has the advantages of easiness and convenience for operation, high success rate and high practicability; the prepared proficiency testing sample can be stored and transported at normal temperature and meets the uniformity and stability assessment guide requirement of a CNAS0GL03 proficiency testing sample in the aspects of uniformity and stability.

The invention discloses a multifunctional rotary switch tester, which comprises a machine frame, a test bed, a display screen, an input device, a control system and a load, wherein, the test bed comprises a plurality of test units; each test unit is provided with a switch fixture which is correspondingly provided with a stepper motor and a switch rotating shaft grip holder which is driven to rotate by the stepper motor; the control system comprises a controller, a motor driver, a counter, a sampling circuit and a temperature controller; control software is arranged inside the controller; the display screen ,the input device, various stepper motors and the load are accessed into the control system. The tester of the invention is a device which integrates a plurality of test functions like service life test, temperature rise test, on-off capacity test and so on into a whole and completely improves the defects of the prior tester which are respectively bulkiness, non-tunable detect, small capacity, inconvenient assembly, high cost and so on.

A test system realizes in an English ability test, etc. not only binary correct-false evaluation but also a partial score. The test system uses a computer (101, 102) including an input / output device (207, 208) and a network (103) such as the Internet, etc., and uses a partial test score model obtained by amending the conventional Item Response Theory in estimating an item parameter and ability. In the partial test score model, a partial score is assumed to be a true-false average of a plurality of items having the same parameters. Using the test system of the present invention, a test of the presentation format which is hard to determine the correct or wrong answer such as writing and speaking tests in a foreign language test, etc. can be more easily controlled than in the conventional system.

The invention aims to provide a method and a device for testing the flow conductivity of a fracture network of shale. The device comprises a flow conducting chamber, an annular pressure loading device, a fluid supply device and a fluid measuring device. The device and the method for testing the flow conductivity of the fracture network of the shale have the advantage that the flow conductivity of volume fractures under a gas reservoir condition of the shale can be simulated.

The invention discloses an optimization method for carbonate reservoir acid fracturing construction parameters. Oil and gas reservoir capacity simulation software is used for analog computation of thecarbonate reservoir capacity under different crack parameters to determine the optimal crack guide capacity needed by the reservoir production; meanwhile, carbonate reservoir real rock beams are split to form cracks; the surface rough morphology data of the cracks are acquired through three-dimensional laser scanning; then, a rock numerical control carving machine is used for carving the surfacesof the carbonate reservoir real rock beams to obtain carbonate rock artificial rock beams with real crack surface morphology; the acid etching experiments and the acid fracturing crack guide capacitytests under different construction parameters are performed on the carbonate rock artificial rock beams; and testing results and analog computation results are compared and analyzed to obtain the optimal acid fracturing construction parameters meeting reservoir characteristics. The optimization method for the carbonate reservoir acid fracturing construction parameters can achieve experimental results nearer actual construction conditions.

The invention relates to the field of test of the photovoltaic power generation system, in particular to grid-connection adaptability testing system and a method for photovoltaic power stations. The grid-connection adaptability testing system comprises a photovoltaic array, a direct-current switch and a photovoltaic inverter which are sequentially connected. A voltage acquiring port of the photovoltaic inverter is connected with a microcomputer relay protector and used for inputting voltage signals of the microcomputer relay protector into the photovoltaic inverter. An oscilloscope is respectively connected with the voltage acquiring port and an output contactor of the photovoltaic inverter and simultaneously monitors voltage signals of the microcomputer relay protector and on or off signals of the output contactor of the photovoltaic inverter, and grid-connection adaptability testing results are judged by processing and analyzing recorded waveforms through the oscilloscope. The grid-connection adaptability testing system and method have the advantages of simplicity in implementing, convenience in testing and high testing accuracy.

The invention relates to the technical field of petroleum exploration and development experimental facilities, in particular to a hard and brittle shale microfracture manufacturing method and a plugging capability testing system. The testing system comprises a stable gas source, a high-temperature and high-pressure dynamic displacement device, a shale sample clamp, an outlet liquid receiving device and a circulating press pump, wherein the stable gas source is connected with the high-temperature and high-pressure dynamic displacement device through a section of high-pressure pipeline, the shale sample clamp is used for clamping a shale sample to be tested and is connected with the high-temperature and high-pressure dynamic displacement device through screw threads, the outlet liquid receiving device is connected with the outlet end of the shale sample clamp through a valve, the circulating press pump is connected with the shale clamp through a high-pressure pipeline, and stable pressure is provided as the pressure of the circulating press pump through the stable gas source. The manufacturing method and the plugging capacity testing system can be used for plugging agent preference selection experiments and drilling liquid plugging capability test experiments, and a reliable testing means is provided for the researches of the well wall stability of a hard and brittle shale stratum.

The invention discloses an early-stage autism screening system based on a joint attention ability test and an audio-video behavior analysis. Audio-video multimodal data of an evaluator and a testee iscollected and analyzed so as to evaluate and predict autistic spectrum disorders. The system includes a data acquisition module, a preprocessing module, a feature extraction module, a training classification module and a prediction module. The data acquisition module is used for multi-view and multi-channel collection of the audio-video multimodal data of the evaluator and the testee in a test; the preprocessing module synchronously collects the audio-video data, detects and marks the time when the evaluator issues a command through voice recognition, and extracts and analyzes an audio videoafter the point in time; the feature extraction module is used for feature extraction of the pre-processed audio-video data, and speech content, facial emotions and other features are obtained; the training classification module takes the extracted combination features as an input of a machine learning classifier for training, and a classifier model for predicting the autism is obtained; by usingthe classifier model obtained through training, the prediction module performs autism classification and prediction on the testee whose data is collected.

The invention concerns a vocational aptitude testing method and device for detecting the aptitudes and interests of subjects having various cognitive abilities to a range of activities, that makes it possible to select at least one task among a library of tasks, provide instructions regarding the at least one task to the subject, provide at least one stimulus of the at least one task to the subject, detect at least one action by the subject in response to the at least one stimulus, and perform at least one of collecting, processing, presenting, transmitting, and displaying data obtained from the test subject's response.

The invention discloses a road surface anti-skid performance testing device. The device comprises a driving force part, a data acquisition part, a testing part and a pedestal part. The driving force part comprises a rotation speed control device, a motor and a driving shaft, and provides driving force for a test instrument and controls the rotation speed of a testing disk. The data acquisition part comprises a torque sensor and a data display, and the torque sensor is connected with the data display by a data line. The testing part comprises one testing disk, three rubber sheets are arranged at the bottom of the testing disk, the rubber sheets are in contact with a testing surface, and the driving shaft drives the testing disk to perform test. The pedestal part comprises a bearing plate, a bracket and three support screws, and ensures the tight and parallel contact between the testing disk and the road surface. Anti-skid performance tests are carried out on road surfaces of different configurations by the road surface anti-skid performance testing device so as to analyze the anti-skid performance of the road surfaces of different configurations and provide reliable test basis.

The invention relates to an on-line tester for plugging capability of water-base mud, which belongs to the technical field of instruments for testing the plugging capability of drilling mud. The tester consists of an experimental reactor, a heater, a servo motor, a data acquiring-processing device, a back pressure receiver, a gauge and a pressure control device, wherein the heater is arranged on the experimental reactor; one side of the experimental reactor is provided with the servo motor; a photoelectric displacement sensor is arranged on a motor bracket; the data acquiring-processing device is arranged below the motor; the back pressure receiver and the gauge are arranged below the experimental reactor; and the other side of the experimental reactor is provided with the pressure control device. The tester can integrate static water loss, mud-cake thickness, mud-cake strength of water-base mud filtrate in the drilling process of simulated high-temperature high-pressure thickness static test in order to comprehensively evaluate the plugging capability of the water-base mud in the drilling process. The tester solves the problem that the experimental test of the conventional tester for the properties and strength of mud cakes in the drilling process can be only limited to separate test. In addition, the tester has the advantages of simple structure, use convenience and applicability to online test for various types of drilling mud.

The invention belongs to the technical field of rehabilitation medicine protection and particularly relates to a method for evaluating the balance capacity of old people. The method includes the following steps that A, experimental subjects are grouped into a normal group, a low-risk group, a middle-risk group and a high-risk group according an old people balance capacity test scale, plantar pressure distribution generated when the old people sit up is detected through a plantar pressure distribution detecting system, and cushion pressure generated when the old people sit up is detected through a cushion sensor; B, the old people walk on a three-dimensional dynamometry table, and kinematics parameters of the gaits generated when the old people walk are acquired through the three-dimensional dynamometry table, wherein the kinematics parameters comprise the pressure and torque in the foot vertical direction, the pressure and torque in the foot front-and-back direction and the pressure and torque in the foot inside and outside directions; C, sample entropies of the plantar pressure and torque during sitting up and walking are subjected to statistic analysis, the significant difference of the correlativity between the variable sample entropies is found, and an objective evaluation standard is obtained. The method has the advantage of being capable of evaluating dynamic balance of the old people.

The invention relates to a method for updating firmware, which is executed in a device with a non-volatile memory, wherein the original firmware of the device is stored in a first region in the memory. Firstly, new firmware is obtained and stored in a second region in the memory. When the firmware storage is finished, the capability of start-up is tested. The test for the capability of start-up also comprises the steps: before judging whether the new firmware can pass the test or not, using a flag to designate another firmware for the start-up of the device besides the new firmware, responding to the start-up action of the device, loading and operating the new firmware, judging whether the new firmware passes the test for the capability of start-up or not, if the new firmware can operate and the device conforms to preset conditions, changing the value of the flag, designating the new firmware for next start-up, and maintaining the value of the flag if the new firmware does not pass the test for the capability of start-up. The method for updating firmware can avoid the problem of start-up caused by firmware version or design errors.

The invention relates to the technical field of machines, in particular to a semi-submersible type hydraulic testing device for a vertical and axial suction centrifugal pump. The semi-submersible typehydraulic testing device comprises a testing cylinder, a lifting platform, a water sucking pipeline, an execution motor, adjusting lead screws and a degassing pipe. The water sucking pipeline is arranged on one side of the testing cylinder and connected with the testing cylinder. The water sucking pipeline is further provided with a regulating valve. The lifting platform is provided with adaptorplates, and therefore a pump body to be tested can be conveniently installed on the lifting platform through the adaptor plates. The adjusting lead screws are arranged between the lifting platform andthe adaptor plates, and the position adjustment of the lifting platform in the vertical direction is achieved through the adjusting lead screws. The execution motor is arranged on the water sucking pipeline and connected with the regulating valve. The other side of the testing cylinder is further provided with the degassing pipe. The semi-submersible type hydraulic testing device can adapt to andbe matched with various types of vertical pumps, the universal degree and the application ability of the testing device are improved, and convenience is brought to installation and adjustment of thevertical centrifugal pump in the testing process.

The invention relates to a method and device for detecting human body erect position balancing fatigue. The factors of fatigue are complex and various in expression forms, and generally, fatigue is the result of the combined action of physiological fatigue and psychological fatigue. According to the technical scheme, a dynamometry balancing platform is provided with a pressure sensing area capable of detecting pressure at a plurality of points, a nine-lamp remaining capacity testing device and a hand-held electrocardiosignal detecting device all of which are communicated with a central processing unit. The method and device for detecting the human body erect position balancing fatigue have the advantages that the erect position balancing measuring method is adopted to measure a changing curve of the gravity center of the human body, inspect the balancing capacity of the human body and to judge the state of fatigue of the human body; an erect position balancing apparatus soft hardware system is developed independently, so that when the balanced capacity of the human body is measured, the degree of fatigue is comprehensively detected and evaluated on the aspects of physiology and psychology through the cooperation of a touch type display screen and an electrocardiography detection device; a comprehensive measurement index is obtained, whether such personnel can finish the current work safely and reliably or not is judged, and instructive suggestions are made; the device is compact and reasonable in structure, convenient to install and use, fast in detection and stable in performance.

The present invention relates to a method for resting and evaluating capacity of corrosion prevention system of cosmetic. The invention selects micrococcus pyogenes, bacillus coil, bacillus pyocyaneus, candida albicans, aspergillus niger and salmonella as evaluating strain. The product is grafted into the cosmetic sample solution through the six pathogens and the mixed strains composed of the six pathogens for executing culture experiment. The corrosion prevention capacity of cosmetic is evaluated through comparing and identifying data. The risk resistance capacity of cosmetic for resisting the microbial pollution is effectively evaluated. As the six pathogens have wide representativeness and typical reference value, the six pathogens are used as the typical representative sample strains for evaluating. If the corrosion prevention capacity test is passed, the pollution of product by the microorganism can be effectively prevented, and the possibility of product pollution caused by the reproduction of microorganism can be effectively suppressed. The safety risk caused by product and the cost for frequently executing microbiological examination can be reduced through the basic product formula checked by the corrosion prevention capacity test or all products extended from the basic product formula. The effect is extraordinarily remarkable.

The invention provides an unmanned vehicle emergency vehicle avoidance capacity test method and a test field. The test method comprises the steps that scene arrangement for the test field and responding to a to-be-tested vehicle are performed, wherein scene arrangement is performed as follows: the test field comprises a road, and the to-be-tested vehicle is arranged on the road; a reference vehicle is controlled to run in front or back of the same lane or the adjacent lane of the to-be-tested vehicle, and the reference vehicle keeps an avoiding distance with the to-be-tested vehicle; an emergency vehicle is controlled to be close to the to-be-tested vehicle from the rear part of the same lane or the adjacent lane of the to-be-tested vehicle; the step of responding to the to-be-tested vehicle is carried out as follows: when the emergency vehicle is close to the to-be-detected vehicle from the rear part of the same lane or the adjacent lane of the to-be-tested vehicle, the to-be-tested vehicle makes an action of avoiding the emergency vehicle, and the emergency vehicle runs preferentially.

The invention discloses a DC circuit breaker semiconductor component turn-off capability test loop with a protective function, and belongs to the scope of a DC circuit breaker performance test device. The DC circuit breaker semiconductor component turn-off capability test loop comprises a pre-charging unit, a test current generating unit, a thyristor triggering unit, a protection unit, a tested semiconductor component and an energy absorbing unit. The pre-charging unit and the test current generating unit and an inductor L1 are connected to form an LC oscillation loop so as to generate the test current. According to the protection unit, only one diode is connected on the two ends of the main loop thyristor in an anti-parallel way. The voltage overshoot of the reactor due to the reverse recovery process of the thyristor can be limited. The energy absorbing unit is a sliding resistor which is connected in parallel on the ends of the tested semiconductor component. The loop has the characteristics of testing the current turn-off capability of multiple semiconductor components and can prevent the insulation breakdown of the reactor due to voltage overshoot so as to effectively protect the test reactor.

The invention relates to a negative testing method applicable to standard and digital relay protective devices, which is characterized by simulating possible abnormal conditions in a data interaction process of a digital relay protection device according to the configuration of a user and testing the abnormal condition handling capacities of the digital relay protection device, wherein abnormal condition handling capacities comprise a capacity for handling test message destination address errors and data errors and a capacity for handling delayed test message transmission. The test of whether a digital protection device has an abnormal optical fiber communication condition handling capacity under a condition of sound operation of optical fibers in an initial test stage is difficult, so artificially simulation of abnormal optical fiber communication conditions is necessary for testing the abnormal optical fiber communication condition handling capacity of the digital protection device. Through the customization of output messages of a digital relay protection tester, possible abnormal communication conditions can be simulated artificially, so the problem of testing the abnormal communication condition handling capacity of the digital relay protection device is solved.