70 results about "Positive test" patented technology

The present invention is a single self-contained device for collecting, transferring, extracting, and testing for the presence of a target analyte in a sample obtained from a surface by swabbing, solid materials (pills, capsules, unknown powders), air samples and biological and non-biological fluids. The device includes a swab, a retention well including eluent fluid, and analysis technologies which can include but are not limited to lateral flow testing analysis. The major improvement is the invention of rinsing the swab with proprietary elution fluid prior to testing thereby not compromising the chemistry and allowing for a wide variety of applications under extremely hot or cold field conditions. Also, the device is in one self-contained unit instead of having a separate water dropper or spray. Moreover, the shape of the device is similar to a magic marker so it is more substantial than any drug tester on the market, as well in certain embodiments it can have grips resembling a gun and in certain embodiments can even emit sounds or smells when a surface is wiped or a positive test is attained

A method and system comprising a diagnostic symptom tree system for diagnosing a failing system element causing a symptom in a system-under-test. A diagnostic symptom tree comprises symptom roots and dependent lower function nodes and sub-function nodes. Element nodes depend from the function or sub-function nodes, and a plurality of penultimate failure mode leaves depend from the element nodes. The function and sub-function nodes and the failure mode leaves comprise test information. Responsive to positive test results, the diagnostic symptom tree is configured to identify a function or sub-function or element node associated to a lowest symptom tree node or failure mode leaf for which a test is positive, or advise that no failing function or sub-function or element is found. In one aspect of the invention, nodes may include parameter values allowing successive selections of the nodes of the symptom tree for test iterations according to the parameter values.

Recombinant B. burgdorferi proteins, representative of the life cycle, are membrane-immobilized to capture antibodies in biological samples. Lateral flow technology incorporating gold colloid deposition results in band visualization indicative of a positive test.

Provided is a system and method for black-box testing of software using positive and negative test cases with N-way combinations of parameter values. An original model comprising valid and invalid values is modified in a first phase, by generating exclusions (constraints) for pairs of invalid values. A first suite of test cases is generated from the modified model, and positive test cases eliminated, creating a first test suite with only negative tests. In a second phase, the original model is modified by eliminating invalid values, from which a second test suite having only positive test cases for all valid N-way combinations is generated. Merging the two test suites provides a suite of positive and negative test cases that test software with N-way combinations of values, in which each negative test case has only one invalid value.

A method for determining whether a microorganism produces an AmpC β-lactamase is disclosed in which a culture of a microorganism suspected of producing a β-lactamase that inactivates a β-lactam-containing antibiotic is admixed with an effective amount of each of i) a β-lactam-containing antibiotic, ii) a β-lactamase inhibitor to which AmpC β-lactamase is resistant, and iii) a permeabilizing agent for the microorganism present in a non-growth-inhibiting microorganism-permeabilizing amount to form an assay culture. That assay culture in maintained under appropriate culture conditions and for a time period sufficient to determine the interaction of the microorganism with the AmpC β-lactamase resistant inhibitor and antibacterial compound, and thereby determine the presence of an AmpC β-lactamase, wherein a positive test indicates the presence of an AmpC β-lactamase.

The invention discloses an integrated device for testing voltage and internal resistance of batteries and shaping and cutting battery lugs. Two groups of positive and negative probes are added on a strip-shaped press block which shapes the battery lugs, and the two groups of positive and negative probes are respectively connected to slots for an external test pen at the periphery of the device through leads; two positive slots and two negative slots are connected to positive test pens and negative test pens of an internal resistance tester; the shaping press block can be a Teflon component; the interval of the probes embedded in the shaping press block can be correspondingly adjusted according to different intervals of battery core lugs; before the battery lugs are cut, the shaping press blocks flatten the lugs, the positive and negative test probes are also pressed on the positive and negative lugs, and the voltage and internal resistance of the battery can be tested simultaneously; and scanning gun holding racks are respectively disposed at right side and left side of the device. According to the device, by designed modification, the divided operations of testing the voltage and internal resistance of the battery and shaping and cutting battery lugs can be combined; the production efficiency is improved; and the labor intensity is reduced.

The invention relates to a method for detecting the power assisting efficiency of a load-bearing exoskeleton. The method comprises the following steps of (1) when a person does not wear the exoskeleton and does not bear a heavy load, obtaining kinematic and dynamic information by using a three-dimensional motion acquisition system and a force measuring treadmill; and verifying a human body joint moment positive test model based on surface electromyogram signals by using the human body joint moment calculated by inverse dynamics as a reference; (2) when the person wears the exoskeleton and bearing a load G1, obtaining the relationship between the time and the moment of the hip joint, the knee joint and the ankle joint by a method based on the surface electromyogram signals; (3) when the person does not wear the exoskeleton and carries out a load bearing test of 0 to 40 kg, testing the relationship between the time and the moment of the hip joint, the knee joint and the ankle joint of the human body under different loads in the time period; and (4) obtaining the ratio of the effective load to the total load according to data, measured in experiments, between the load of the human body and the driving moment of the total joint of the human body when the exoskeleton is not worn under the condition of different loads. The invention provides a novel method for testing the lower limbjoint moment of the exoskeleton.

The invention relates to an automatic low resistance test device and belongs to the resistance testing technical field. The automatic low resistance test device is especially suitable for initiating explosive device resistance tests. The automatic low resistance test device includes a main control unit 1, a constant current source module 2, a test channel switching circuit 3, a signal conditioning circuit 4, an analog-to-digital conversion circuit 5 and the like; the main control unit 1 successively outputs chip selection codes of a positive test channel and a negative test channel according to corresponding test items so as to control the test channel switching circuit 3 to perform switching, so that the output current of the constant current source module 2 can pass through a gated initiating explosive device loop; the signal conditioning circuit 4 performs filtering and differential amplification on port voltage of the gated loop; the analog-to-digital conversion circuit 5 acquires related voltage signals and transmits the voltage signals to the main control unit 1 for calculation, so that the resistance values of a tested item under test current of different directions can be obtained, and the test result of the tested item can be obtained through averaging; and the main control unit 1 repeats the above steps according to a preset test sequence so that test on the other test items can be completed; and therefore, automatic, rapid and comprehensive test on the resistance of an initiating explosive device can be realized.

A genetic algorithm based software repair method includes steps of A), signifying a to-be-repaired program to be an abstract syntax tree structure, generating a test case suite comprising positive test cases which are correctly executed in the program and negative test cases which are abnormally ended or produce error results during program execution; B), copying original programs to acquire M program copies, subjecting the M program copies to mutation operation and setting the biggest evolutionary algebra; determining fitness function, taking invariants as invariant constraints to calculate fitness, executing all test cases to each individual, calculating number of passed test cases and maintained number of the invariant constraints, and acquiring fitness values of each individual by calculating; D), subjecting genetic operation of the individual of each generation population comprising variation, intersection and selection; E), terminating conditional judgment.

The invention relates to a protein suspension chip of ricin and methods for preparing, quantifying and detecting the same. The detecting method comprises the following steps: adding a working solution and a sample to be tested into a hole; adding a detection antibody; adding SA-PE; adding a detection buffer solution and mixing the mixture evenly; and reading numerical values, analyzing data and judging the detection result. The quantifying method comprises the following steps: adding a positive test sample or a standard product for dilution through gradient multiple proportions, detecting a series of diluted samples in a suspension chip system, and reading a corresponding fluorescence value (MFI); making a dosage-reaction curve; and fitting the dosage-reaction curve and an equation. The suspension chip comprises a coded microsphere, a ricin capturing antibody coated on the microsphere, a biotin-marked ricin detection antibody, a streptavidin-phycoerythrin and the buffer solution. The methods have the advantages of good detectability, high sensitivity, strong specificity and wide dynamic range.

The invention discloses a fluorescence microsphere-colloidal gold double-coloring qualitative quantitative immunochromatographic test strip for detecting antibiotics and a preparation method thereof.A bottom plate is successively overlapped and pasted with a filter paper, a sample pad, a glass fiber pad coated with a fluorescence microsphere-antibiotic monoclonal antibody compound and a colloidalgold-antibiotic monoclonal antibody compound, a nitrocellulose membrane and an absorbent paper; the nitrocellulose membrane is coated with an antibiotic conjugated antigen as a detection line and coated with an anti-mouse antibody as a quality control line; if the color development of the detection line is lighter than that of the quality control line, then the qualitative judgment of the antibiotics in the samples is positive; and the positive test strip is directly inserted into a fluorescence reader which quantizes fluorescence signals of a fluorescence microsphere color system to realizequantitative detection. The Fluorescence microsphere-colloidal gold double-coloring qualitative quantitative immunochromatographic test strip for detecting the antibiotics is mainly used for qualitative and quantitative detections of the antibiotics in food safety detection.

The invention discloses a device for detecting conductivity of the connection position of a battery module and a detection method of the device. The device comprises a tester, a computer host and a display, wherein an output end of the tester is electrically connected with an input end of the computer host, an output end of the computer host is electrically connected with an input end of the display, a resistance test meter and a current test meter are embedded in the middle of the tester, the tester is connected with positive test electrodes and negative test electrodes through wires rotationally connected to wiring knobs, and one end of each of the positive test electrodes and the negative test electrodes is connected to a parent material. The device can determine connection conductivityof battery modules and cannot damage welding points, so that the purpose of nondestructive detection is achieved; whether the conductivity of the connection position is good is determined by comparing the difference between the change degree (namely, the slope of a linear straight line) of resistance value of a workpiece under different currents and the standard value, and influences of workpiecetemperature and other factors on measured data are greatly eliminated.

The invention discloses a mycoplasma pneumoniae rapid identification and cultivation susceptibility test kit which comprises a kit and a susceptibility panel, wherein, the kit comprises a box body which is internally provided with ultrapure water reagent, paraffin oil reagent, physiological saline reagent and mycoplasma pneumoniae rapid identification culture medium; the susceptibility panel includes a panel body and a panel cover, wherein, the panel body is provided with a negative test hole and a positive test hole, a plurality of drug property comparison holes are arranged correspondingly to the negative test hole and the positive test hole, and the drug property comparison holes corresponding to the positive test hole is internally provided with test medicine. The invention also discloses a test method which comprises: culture fluid is firstly prepared and then added into the negative test hole to extract pathological change solution, and the pathological change solution is added into the culture fluid to obtain mixed solution; the mixed solution is added into the positive test hole and the drug property comparison holes to be cultured, and then the result is obtained. The mycoplasma pneumoniae rapid identification and cultivation susceptibility test kit and the test method are simple in operation and short in detection period.

The invention discloses a multifunctional electric pole erector for power system agricultural power, which comprises a main clamp and a secondary clamp, one side of the main clamp and the secondary clamp are hinged by a hinge, and the main clamp and the other side of the auxiliary clamping plate through the positioning piece and the positioning ball. The inner sides of the main clamping plate and the secondary clamping plate are respectively provided with a first clamping groove and a second clamping groove. An electronic level is installed on the top of the auxiliary pallet, and a support column is also provided on the top of the main pallet and the secondary pallet. The structure of the multi-function pole measuring and erecting device dedicated to agricultural power in the power system is simple, and the display screen on the control panel can display the pressure value sensed by the first pressure sensor and the second pressure sensor, and compare the pressure value, which can be intuitive Knowing the inclination direction of the electric pole, you can complete the alignment. The entire alignment process does not require a manual hand-held alignment device, which is not easy to produce errors and effectively improves work efficiency.

The disclosed embodiments are generally directed to improving feature detection of rapidly acquired images using camera-enabled mobile devices involving a 2-D decal code, such as a QR code, for improving the reading accuracy of a rapid diagnostic antigen or antibody or enzymatic colorimetric directed test, such as for COVID-19 diagnosis. One primary issue with evaluating a Covid-19 rapid test is detecting and quantifying positive test lines from sampled test strips based on digital images of the test strip. Aspects of the present invention contemplate masking a QR code to improve the sample image resolution and contrast. Other aspects of the present invention contemplate methods and techniques to evaluate a test line on the sample image by enhancing an intensity curve along the test line and control line containing area by way of calculating the instantaneous change in pixel intensity and evaluating the position and intensity of those signals.

The invention discloses a method for treating the hydrogen sulfide by strengthening the origin microbial activity, including the following steps: 1) A basic property test and a nitrate reducing test are carried out to the bacteria in the oilfield water. 2) The nitrate reducing positive test is carried out to the oilfield water for determining whether the oilfild water contains the nitrate reducing bacteria or not. 3) A hydrogen sulfide inhibitor and positive iron fungicide are added. The components and the weight percentage of the hydrogen sulfide inhibitor are that a nitrate is 10 to 45 percent, a hydrogen sulfide solution activation system 8 to 10 percent and water 45 to 80 percent. The hydrogen sulfide solution activation system is prepared by taking at least more than five components from poly-aspartic acid, a glycerol, a chloride, a protease, a protein matrix and edta sodium magnesium salt to dissolve into an ionic water for preparing a solution with a weight percent concentration of 35-40 percent. The poly-aspartic acid, a glycerol, a chloride, a protease, a protein matrix and edta sodium magnesium salt exist a certain weight percent relation with each other.

The invention provides an interface test case generation method, an apparatus, an electronic device and a storage medium. The method comprises the following steps: acquiring interface configuration information of an interface to be tested, wherein the configuration information comprises field value setting of at least one field; generating an effective field value list and an invalid field value list according to the field value setting of the field, wherein the effective field value in the effective field value list conforms to the field value setting, and the invalid field value in the invalid field value list does not conform to the field value setting; generating a positive test case by traversing the effective field value list; traversing the invalid field value list to generate a negative test case; and combining positive test cases and negative test cases of each field of the interface to be tested to generate an interface test case list of the interface to be tested. The methodand the device provided by the invention automatically generate and maintain test cases, reduce repetitive labor, lighten the daily work burden of testers, and save unnecessary maintenance cost.