4 results about "Comparative test" patented technology

This disclosure provides a method, apparatus, device, and storage medium for A / B testing, relating to the field of computer technology, and particularly to the field of computer testing technology. The specific implementation scheme is as follows: Traffic is randomly divided into group A and group B, with group A and group B having equal amounts of traffic; group A is randomly and equally divided into at least two subgroups of traffic; group B is also randomly and equally divided into at least two subgroups of traffic, with each subgroup of group B having equal amounts of traffic to each subgroup of group A; the subgroups of traffic are then permuted and combined to obtain at least four pairs of subgroups; multiple comparative tests are performed using at least four pairs of subgroups of traffic to obtain the A / B test results. The A / B test results obtained using the above method are more stable and reliable compared to the test results obtained using only one pair of traffic groups.

This invention discloses a refined model test method, system, and equipment for the soil displacement effect of open-pit pipe piles, relating to the field of open-pit pipe pile driving technology. The method includes: establishing multi-physical quantity similarity criteria and determining similarity constants; based on the similarity constants, preparing grouting mixture and constructing a micro-reinforcing cage; using the micro-reinforcing cage and grouting mixture to construct an open-pit pipe pile model; establishing a model box, preparing soil samples with target density and homogeneity using a layered filling method within the box, and setting up a pile driving test platform; constructing a comparative test scheme, and simultaneously monitoring and recording pile driving data using the pile driving test platform; processing and comparing the pile driving data to obtain data criteria, providing a basis for optimizing open-pit pipe pile driving parameters and construction control. This invention solves the problems of incomplete model similarity relationships, single test monitoring dimensions, difficulty in quantifying and comparing results, and the inability to provide an operational basis for optimizing engineering construction parameters.

This utility model belongs to the technical field of comparative test blocks and discloses a comparative test block for digital radiography (DR) pipe thickness measurement. It includes a magnetic block with a straight rod connected to its center. A stepped test block is installed in the middle of the straight rod, and a round bar is fixedly installed at the end of the straight rod. Based on the current availability of only one set of data to ensure the authority of the final data used, this method allows for the simultaneous acquisition of data from both the direct measurement method using a round bar and the experimental comparison method using a stepped test block in a single installation. The two sets of data are compared and verified, making the data more authoritative.

This invention belongs to the field of aircraft manufacturing technology and discloses a non-destructive metrology method for detecting defects in comparative samples and the inner walls of holes. The sample includes a comparative test block with eddy current holes. The eddy current holes have notches, which include a first part and a second part. The first part has a triangular cross-section, and the second part has a rectangular cross-section. Only one of the first and second parts is present on the comparative test block. When the first part is present, it is located at the corner of the eddy current hole; when the second part is present, it is located on the inner wall of the eddy current hole. This configuration allows the comparative test sample to accurately reproduce defects in the inspected workpiece, meeting the verification requirements of eddy current testing technology for measuring the dimensions of hole sidewalls, hole corners, or features such as blind grooves. Furthermore, this non-destructive metrology method can be used to monitor the quality of defects in the inner walls of aerospace metal holes, thereby contributing to the improvement of quality and safety in aircraft manufacturing technology.