334 results about "Direct test" patented technology

A test structure for testing graphical user interface applications (GAPs) modularizes test scripts by separating statements that define GAP test logic from statements that navigate to GAP objects. Composition rules weave the statements together to generate the test scripts that are executed to test the GAP. Because the test structure is modular, test logic can be reused across different GAPs and different versions of the same GAP. Reusing test logic is not only an efficient practice from a test engineer's point of view, but also leads to a reduction in test programming errors. The modular test structure also facilitates the efficient modification of test scripts to account for modifications in the underlying GAPs, greatly reducing the time, cost, and resource expenditures needed to arrive at updated test scripts.

Individual test executive sequences may correspond to individual sub-components of a hierarchical system. To test a system sub-component directly without testing “upper” sub-components in the hierarchy, a first test executive sequence corresponding to that system sub-component may be executed directly, without requiring execution of test executive sequences above the first test executive sequence in the hierarchy, or requiring only partial execution of test executive sequences above the first test executive sequence in the hierarchy. Another embodiment of the invention comprises a system and method for enabling propagation or inheritance of test executive sequence local variables.

The invention discloses an active reflection coefficient test system and method of a phased array antenna. The test system comprises a vector network analyzer, a multichannel amplitude phase control auxiliary unit, a signal extraction auxiliary unit, a master control computer, a calibration member and an amplitude-stabilizing phase-stabilizing cable, wherein the vector network analyzer is configured to generate test excitation signals and receive reference, reflection and monitoring signals; the multichannel amplitude phase control auxiliary unit is configured to convert one path of excitation signals into M paths, control the amplitudes and phases of the M paths of signals independently, and output M paths of amplitude and phase controllable excitation signals; and the signal extraction auxiliary unit is configured to realize straight-through output of the M paths of amplitude and phase controllable excitation signals, carry out reference coupling, monitoring coupling and reflection coupling extraction on the M paths of amplitude and phase controllable excitation signals, and implement switching control and selective output. The test system can directly test the active reflection coefficient of the antenna unit needless of calculation, the test process is concise, manual operation is less, and the test result is highly correct.

The invention provides a device and a method for friction fuzzing and pilling of yarn. The device for friction fuzzing and pilling of yarn is characterized by comprising a bobbin bracket, a yarn guide roller, a movable yarn guide mechanism and a winding mechanism which are arranged in the winding direction of the yarn in sequence; the upper side of the winding mechanism is provided with a friction cover plate; and the friction cover plate is connected with a movable friction mechanism. The invention has the advantage of simple operation, can direct test the yarn without knitting pieces, is closer to the fuzzing and pilling condition of real-time fabrics and is convenient for observation.

The invention discloses a method suitable for directly testing and evaluating the quenching effect of an aluminum alloy material. The method comprises the following steps of: (1) cutting a quenching sample, filling a thermocouple into a characteristic position, and performing heat insulating treatment on the side face of the sample; (2) performing solution heat treatment on the treated sample and monitoring the temperature; (3) performing quenching tests under different quenching conditions and monitoring the quenching cooling speeds of the sample at different positions; (4) testing residual stress on the characteristic position, determining the tensile properties, hardness and electric conductivities of positions of different depth distances way from the quenching surface, drawing a curve and performing microstructure observation and analysis; and (5) determining an appropriate quenching process for practical material production according to a test result obtained in the step (4). In the invention, a sample heat insulating treatment method is adopted, and the temperature is monitored in real time with a thermocouple filling method, so that the practical quenching state of a material can be simulated directly and accurately, the consistence between the test result and a test result of a large-specification workpiece under overall quenching is high, and a quenching process suitable for practical production can be optimized and determined.

The invention relates to air conditioner technologies and discloses an air conditioner compressor tubing vibration reliability evaluation method. After compressor excitation is recognized, a simulation means is utilized to monitor stress at bending positions and a stress centralized part of a compressor during tubing vibration when all frequency points are in an operating state, and the problem that it is difficult to comprehensively detect tubing stress in a stress test is solved. The method comprises the steps that a, an air conditioner tubing vibration test is performed; b, finite element model system recognition is performed; c, compressor load recognition is performed; d, a response is calculated through simulation; e, response error analysis is performed; and f, tubing stress risk point recognition is performed. Through the method, it is not needed to directly test load excitation in the compressor, the load recognition technology is utilized to accurately calculate a load excitation value of the compressor, and then a stress value of the part difficult to monitor in the stress test is accurately calculated through the simulation means, so that the defect of the stress test is overcome, the air conditioner tubing fatigue crack risk is lowered, and tubing vibration reliability is improved.

The description describes a test sample preparation device comprising a housing, a filter assembly disposed over an opening in the housing and including a plurality of wells, a sampler tray removably disposed in the housing, and a plurality of vials removably coupled to the sampler tray and being in liquid receiving relationship with the wells. A filter assembly is also disclosed and which comprises a cover defining an impervious wall and plurality of wells formed in the wall, each wall having first and second open ends, the second open end of the well comprising a tubular protrusion. A housing is also disclosed and comprises a generally cylindrical body, a vacuum channel providing fluid communication between the interior and the exterior of the cylindrical body, and a key mechanism including a post having first and second ends, the key mechanism being arranged to orient a sampler tray and vials with respect to the housing. A method for simultaneously preparing multiple test samples for automated liquid chromatography and a method for automated liquid chromatography are also disclosed and comprise depositing test samples into a plurality of wells, simultaneously passing the test samples through porous media disposed in the wells, and depositing the filter test samples directly into vials removably coupled to a sampler tray.

A mechanism for exploiting the data gathered about a system model during the system design phase to aid the identification of errors subsequently detected in a deployed system based on the system model is disclosed. The present invention utilizes the coverage analysis from the design phase that is originally created to determine whether the system model as designed meets the specified system requirements. Included in the coverage analysis report is the analysis of which sets of test vectors utilized in simulating the system model excited individual components and sections of the system model. The present invention uses the information associated with the test vectors to select appropriate test vectors to use to perform directed testing of the deployed system so as to confirm a suspected fault.

A coverage-directed test generation technique for functional design verification relies on events that are clustered according to similarities in the way that the events are stimulated in a simulation environment, not necessarily related to the semantics of the events. The set of directives generated by a coverage-directed test generation engine for each event is analyzed and evaluated for similarities with sets of directives for other events. Identified similarities in the sets of directives provide the basis for defining event clusters. Once clusters have been defined, a common set of directives for the coverage-directed test generation engine is generated that attempts to cover all events in a given cluster.

The invention provides an electrolytic cell with a controllable temperature used for electrochemical measurement. The electrolytic cell comprises an upper cover (1), a sleeve top board (2), a electrolytic cell container (3), a circulating water sleeve pipe (4), a water inlet (5), a sleeve bottom board (2), a fixed support plate (7), a working electrode (8), a gasket (9), a fastening bolt (10), a sealing ring (11), container legs (12), a water outlet (13), a platinum electrode (14), a rubber plug (15), a salt bridge (16), a reference electrode (17), etc. Only need to align a sample to a central hole of the sleeve bottom board and screw a nut to make the sample contacted and sealed with the sealing ring, with no need of welding and sealing the sample, the electrolytic cell can directly measure electrochemical properties of the samples, and is convenient for replacing the sample. Temperature of the electrolyte can be controlled by externally connecting circulating water, so that interference electrochemical signals caused by eddy current produced by electric heating can be prevented. The whole container is made of corrosion resistant organic glass members; and the connecting parts are adhered with organic glass adhesives, so that the electrolytic cell is convenient in preparation and has long service life.

A Bayesian network correlating coverage data and input data to a test verification system for coverage directed test generation (CDG) of a device under test. In one embodiment, the Bayesian network is part of a CDG engine which also includes a data analyzer which analyzes coverage data from a current test run of a test verification system and from previous test runs to determine which coverage events from a coverage model have occurred therein, at what frequency and which ones have not yet occurred, a coverage model listing coverage events which define the goal of the test verification system and a task manager coupled to the data analyzer and the Bayesian network which refers to the coverage model and queries the Bayesian network to produce input data to achieve desired coverage events.

Cholesterol from Low Density Lipoproteins (LDL-C) is measured directly with a test strip at room temperature using a reagent that takes advantage of the varying surface charge density on LDLs and non-LDLs to selectively make LDL-C available for testing.

The invention relates to a controllable mechanical seal device, in particular to a controllable mechanical seal based on closing force change. The controllable mechanical seal comprises a stationary ring seat, an electromagnetic loading device mounted on the stationary ring seat as well as a friction torque sensor unit and a U-shaped plug which are arranged on the electromagnetic loading device. The principle of the controllable mechanical seal is that the mechanical seal is controlled by the electromagnetic loading device capable of changing closing force. According to the scheme, a method for directly testing friction of a seal face and the seal face temperature rising is provided and applied to the controllable mechanical seal device; the seal is actively controlled by controlling the current change of the electromagnetic loading device; and the controllable mechanical seal can be used for related engineering fields such as aerospace, petrochemical engineering, energy power and the like and can be used in engineering equipment such as pumps, compressors, reaction kettles, expansion machines, separators and the like.

Disclosed is a novel computer implemented system, on demand service, computer program product and a method for fault-localization techniques that apply statistical analyses to execution data gathered from multiple tests. The present invention determines the fault-localization effectiveness of test suites generated according to several test-generation techniques based on combined concrete and symbolic (concolic) execution. These techniques are evaluated by applying the Ochiai fault-localization technique to generated test suites in order to localize 35 faults in four PHPWeb applications. The results show that the test-generation techniques under consideration produce test suites with similar high fault-localization effectiveness, when given a large time budget.

The sclerometer includes following parts: (1) cabinet rack; (2) frame in force-closed structure including at least two columns to support frame, and a magnetic holder for fixing a supporting bottom board or sample to be tested through magnetic connection; (3) unit for loading test force composed of worm, worm wheel, force sensor, replaceable press head etc; (4) displacement sensor for press head (5) processing system for treating signal and data of sensors. The invention possesses features: suitable to test hardness of sample in different shapes and situations on site; determining testing validity online; each general hardness test can be carried out after press head is replaced.

The invention relates to a test loop for a direct-current switch test. The test loop comprises a current source and a test circuit part connected with the current source, wherein the current source consists of a low-frequency oscillating loop, a closing switch, a lightning arrester and a protection ball; the output end of the low-frequency oscillating loop is connected with the closing switch andthe lightening arrester to form a loop; one end of the protection ball is connected with the high potential of the output end of the low-frequency oscillating loop through the closing switch; the other end of the protection ball is connected with the low potential of the output end of the low-frequency oscillating loop; and the test circuit part consists of a direct test loop and a synthetic testloop. The invention discloses the test loop for a direct-current switch, namely two test loops are united to examine the cut-off performance of the direct-current switch to be tested. The interactioncapacity of an electric arc and an auxiliary loop of the direct-current switch and the arc-extinguishing capacity under high critical rate of rise of on-state current (di / dt) are examined directly. The synthetic test examines the recovery voltage bearing capacity of the direct-current switch after a current is cut off.

The present invention discloses a deep borehole rock body deformation testing device with hand hydraulic pump connected with a pressure gauge and a high-pressure oil tube; two high-pressure oil tube are respectively a load applying course oil tube and a return journey oil tube, the load applying course oil tube is connected to the course piston interface of the hole drilling rock body deformation tester; and the measuring cable is connected with the hole drilling rock body deformation tester and the digital number reading device. The hole drilling rock body deformation tester is composed of four pistons, three displacement transducers, a displacement transducer amplifier, two force measuring sensors, a force measuring sensor amplifier, a detachable active rigid bearing plate, a detachable passive rigid bearing plate, a protective barrel and a circuit protecting barrel; the device has the advantages of high measuring precision, good coupling capacity to the hole drilling wall, directly measuring the deformation modulus value and elasticity modulus value of the deep rock body, simple structure, easy operation, stable testament and accurate data.

A chip test system including a probe card, a chip tray and a cover plate fastened on the chip tray. The chip tray comprises a socket, a chip contact area, an extension contact area, and an alignment contact point. The socket loads the testing chip and is customized for the tested chip. The chip contact area has a plurality of chip contact points to electrically contact the chip. The extension contact area has a plurality of extension contact points corresponding to the chip contact points to direct test signals into the chip and direct feedback signals out of the chip. The alignment point provides an alignment location for the probe card during the chip test.

The invention provides a multifunctional test system capable of simultaneously and directly testing deformation and deformation force in coal body gas adsorption and desorption processes. The problem that coal body changes caused by gas adsorption and desorption can not be truly and reliably tested under the condition of a laboratory can be solved. The coal seam gas adsorption and desorption deformation and deformation force dynamic test system comprises a test tank system, a constant temperature system, a pressure system and a measuring system. The test tank system comprises a base, a tank body, a limiting pressing rod, a force transducer and a limiting mechanism. The constant temperature system comprises a tank body with the upper end open. The pressure system comprises a high-pressure gas storage steel cylinder, a cylinder valve, a four-way joint, a vent valve, a vacuum valve and a vacuum pump. The measuring system comprises a resistance strain gauge, a strain collection instrument, an acoustic emission sensor and an acoustic emission collection device. According to the test system, direct reliable tests on deformation and deformation force in the coal body gas adsorption and desorption processes under different gas pressure conditions, different temperature conditions, different strain conditions and / or different initial stress conditions can be achieved.

The invention discloses a system and a method for testing laser frequency noise power spectrum density based on a Mach-Zehnder interferometer. A laser central frequency is locked at an orthogonal point of an interference curve of the Mach Zehnder interferometer through a feedback loop, so the system works in a good linearity range, converts laser frequency noise into light intensity, and fulfillsan aim of performing direct test through an electronic frequency spectrograph; and a frequency observation point avoids 1 / f noise of the test system through the frequency shift by an acousto-optic frequency shifter. The invention provides the stable testing method which is used for testing laser frequency noise power spectrum density, is applied to an electronic frequency spectrograph, provides ameans for analyzing the influence of laser frequency noise on an optical system, and has significant scientific meaning and application value.

A network testing system for a device under test (DUT) uses a test tool to generate test packets provided to the DUT as source traffic and to receive the test packets back from the DUT as destination traffic. Before the test packets are returned from the DUT to the test tool, an external router receives the test packets from the DUT and forwards them back to the DUT. The DUT has a first pair of DUT interfaces coupled to the test tool and a second pair of DUT interfaces coupled to the external router. The DUT has a first virtual router with a first routing table configured to direct test packets received on one of the interfaces in the first pair of DUT interfaces to the external router. The DUT has a second virtual router with a second routing table configured to direct test packets received on one of the interfaces in the second pair of DUT interfaces to the test tool. Thus, test packets output by the test tool traverse the DUT more than once before returning to the test tool.

The invention relates to a limiting chiral chromatography stationary phase material and a preparation method thereof. An atom transfer radical polymerization method and a click chemistry method are applied, a terpenes compound containing triazo is taken as a monomer, block polymerization is conducted on a silicon surface, a chiral separation layer with the inner layer bonded with cyclodextrin is prepared, and a limiting chiral separation material capable of removing protein is arranged on the outer layer. The limiting chiral chromatography stationary phase material has a multi-layer structure and mixing functions, can be used as a stationary phase, and is applied to the direct test on chromatograph of a sample containing protein, and simultaneously, the chiral separation can be conducted. By being taken as the new material for analysis of a chiral sample, the limiting chiral chromatography stationary phase material is applied to omitting the pretreatment of precipitated protein in the analysis of a biological sample, and the analyzing efficiency and accuracy are improved.

The invention relates to a method for evaluating the battery material of a lithium ion battery by using a symmetric battery, and belongs to the technical field of lithium ion batteries. The method forevaluating the battery material of the lithium ion battery using the symmetric battery comprises the following steps: 1) disassembling the lithium ion battery to obtain pole pieces, and taking and assembling the pole pieces with the same polarity to form the symmetric battery; 2) performing electrochemical test on the symmetrical battery obtained in step 1); and 3) evaluating the battery materialaccording to an electrochemical test result obtained in step 2). The method for evaluating the battery material of the lithium ion battery by using the symmetric battery can accurately test the performances of the pole material, in different states, of the total lithium ion battery in order to prevent no direct test of the performances of the pole material in different states due to the influences of the surrounding environment.

A method and apparatus is disclosed herein for automated testing of an application. A processing system executes the application using test input values that are generated for testing the application with respect to a property of interest. During execution, constraints among symbolic variables of the application are collected. Property state is collected and is used to determine whether a branch in the application is relevant to the property. Based on the collected constraints and branch relevancy, new test input values are generated. The process is repeated until all paths in the application corresponding to relevant branches have been explored.

The invention relates to a wave-front measuring instrument of a collimation deflection beam and a measuring method thereof, relating to the wave-front measurement of a collimation deflection beam in the optical field. The measuring instrument comprises a beam deviation device and a hearing interference light path, wherein the beam deviation device comprises a reflector and an electric combined platform controlled by a computer. The measuring method comprises the following steps: using a stripe generated by a collimation laser through the measuring instrument as a reference stripe chart; setting the action parameter of the combined platform by the computer according to the deflection angle of a beam to be measured; controlling the reflector to rotate and translate to change the propagation direction of the beam into a direction perpendicular to the translation direction of the combined platform; measuring a distorted stripe chart; and calculating the wave-front distribution of the deflected beam at an incidence hole according to a stripe-processing algorithm. By adding a device capable of changing the propagation direction of the deflected beam on a basis of a radial shearing interferometer in the quadrilateral structure, the invention can conveniently and rapidly measure the wave-front distribution of the collimation deflection beam and solve the problem that the traditional instrument can not directly measure the wave-front distribution of the collimation deflection beam.

The invention discloses a device and a method for testing dynamic characteristics parameters of a joint part of a rolling-sliding combined guide rail based on a two-degree-of-freedom system. The test device comprises a test platform and a data collection and analysis system. Compared with the prior art, the device has the obvious advantages that the test platform is simplified as a system with two degrees of freedom so as to be more approximate to the self degree of freedom of the test platform, the theory error is reduced, the test complexity degree is reduced, and dynamic characteristic test signals of a movable component and a foundation can be acquired more easily and accurately; the influence of the foundation displacement is taken into consideration, four sizing blocks are arranged so as to regulate the stability of the test platform, so that the influence of external environment excitation on the test device is further eliminated, and the test accuracy is improved; by virtue of directly testing the dynamic characteristic parameters of the joint part of the rolling-sliding combined guide rail, the influence of a complex joint surface in the joint part is reduced, and the parameter testing accuracy is improved.

The invention discloses a 3D four-wheel aligner with no car pushing required, comprising an image processing and analyzing general module, a vehicle position compensation module, a hardware parameter compensation module, two cameras and four target disks with regular patterns. The 3D four-wheel aligner with no car pushing required is capable of overcoming the defect that a 3D four-wheel aligner with car pushing required is complex in operation. A test can be carried out directly once the target disks are hung, with no car pushing required. The operation is very simple and the data is more accurate. In view of the characteristic that the 3D four-wheel aligner with car pushing required in the market is complex in cart pushing, the 3D four-wheel aligner with no car pushing required in the invention is capable of carrying out measurement directly once the target disks are installed, with no cart pushing required. The technology adopted in the 3D four-wheel aligner with no car pushing required in the invention is totally different from that of the 3D four-wheel aligner with car pushing required, wherein the 3D four-wheel aligner with car pushing required uses position change of the target disks before and after cart pushing to calculate vehicle four-wheel alignment data, while the 3D four-wheel aligner with no car pushing required in the invention uses space structure of the target disks to calculate the vehicle four-wheel alignment data.

The invention discloses an exercise test scheme and a calculation method for a cardiopulmonary function, and belongs to the field of health assessment. A maximal oxygen uptake is a key assessment index of aerobic exercise ability and a core index to reflect an exercise cardiopulmonary function; moreover, in all-cause death attribution analysis, a low cardiopulmonary function is an all-cause death factor ranked first and therefore the assessment on the exercise cardiopulmonary function is very necessary; however, to directly test an oxygen uptake, a very precise instrument is required; and the equipment is expensive and therefore cannot be applied in the field of public fitness. In the method, by researching the shortages of a previous method in depth, an incremental load scheme that measures the maximal oxygen uptake under a secondary high intensity exercise is formulated; on the basis of observing a heart rate reaction after a small-load (25W) excise, a load at a second level is determined; and meanwhile, in a stage of an open test, effective data can be guaranteed to be collected; and based on this, according to a result obtained by the test, a new calculation method for the maximal oxygen uptake is provided; and the method of multipoint regression is adopted, so the error caused by heart rate fluctuation in previous two-point calculation is greatly reduced.