5results about How to "Valid test" patented technology

This application relates to the field of security testing technology, specifically to a method and apparatus for generating fuzzy test data for vehicle-to-everything (V2X) security. The method includes: acquiring CAN bus data; calculating a parameter activity coefficient based on CAN bus frame data with the same ID in the real vehicle data, used to measure the activity and boundary conditions of various control commands in the real vehicle data; then combining the correlation between different IDs to perform temporal correlation feature measurement, and further calculating a random weight coefficient to measure the intensity of random transformation of each CAN bus frame data in the real vehicle data; and correcting the standard deviation of Gaussian noise based on the activity of different types of data and the dependencies between data, thereby generating test data for V2X security fuzzy testing. This application aims to generate test data that conforms to the statistical laws of vehicle communication, thereby improving the data pass rate in the underlying protocol stack and thus more effectively testing the upper-layer business logic.

This invention discloses a method, apparatus, and medium for power-on / off testing of a solid-state drive (SSD), applicable to the field of storage technology. The method first acquires the original first data of the SSD under test, then executes a write command to write the corresponding second data to the corresponding test area of ​​the SSD. During the execution of the write command, the SSD under test is powered on and off. After power-on, based on the execution status of the write command, the first data and / or the corresponding second data are used to verify the SSD's status to determine its condition. If the verification result does not meet the verification logic, the SSD is determined to be in an abnormal state. Using the first and second data for verification, and determining the hard drive status based on whether the verification result corresponds to the execution status of the write command, improves the accuracy of the test. In the event of an abnormal power failure, the location of the power failure can be identified based on the verification error location, improving the comprehensiveness of the test.

This utility model discloses an integrated device for testing the number of uses of anti-fog cloth, relating to the field of anti-fog cloth technology. It aims to solve the technical problem of uneven surfactant distribution on the glass sheet caused by full-coverage wiping with anti-fog cloth, resulting in insufficient accuracy of test results. The device includes a housing with a partition in the middle. From left to right, cavities A, B, C, and D are arranged on the front surface of the partition. A wiping mechanism A is arranged in cavity A, and a testing mechanism is arranged in cavity B. This utility model optimizes the design of the bushing and shaft structure. A drive motor drives the bushing to rotate via gear set A, which in turn causes the lower housing B to rotate synchronously. Simultaneously, the meshing transmission of gear set B causes the reciprocating screw to move the wiping plate radially within the housing. This allows the anti-fog cloth to move in a radial spiral trajectory as the housing rotates, achieving comprehensive and uniform wiping of the glass sheet surface and improving the problem of uneven surfactant distribution in traditional wiping methods.

This utility model discloses a gap testing device, including a base with a worktable on it for placing the workpiece to be tested; a vertical support frame mounted on the worktable, on which a helical pressure device is mounted, and an adjustable testing fixture is mounted on the helical pressure device; a tension / compression sensor is installed between the helical pressure device and the adjustable testing fixture; and an axial support plate mounted on the worktable, on which an axial helical pressure device is mounted, and an axially adjustable testing fixture is mounted on the axial helical pressure device; an axial tension / compression sensor is installed between the axial helical pressure device and the axially adjustable testing fixture. The adjustable testing fixture includes a connecting plate with a connecting rod for connecting to the workpiece to be tested. This device features a simple structure, low production cost, and the ability to effectively, conveniently, and practically test the gap of the output shaft of the workpiece.

This invention discloses a method and system for testing the aggregate content of coarse aggregates in asphalt mixtures, relating to the field of road engineering. The method includes: obtaining the apparent density and mass of each stone in multiple coarse aggregate samples; calculating the average apparent density and total mass of each coarse aggregate sample based on the apparent density and mass of each stone; determining the aggregate mass of each coarse aggregate sample based on the average apparent density and the apparent density and mass of each stone; and calculating the aggregate content of the coarse aggregate in the asphalt mixture based on the aggregate mass of each coarse aggregate sample and the corresponding total mass of each coarse aggregate sample. This invention can effectively test the aggregate content of different coarse aggregates.