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This invention discloses a single-tooth electromagnetic bandgap resonant cavity for testing dielectric properties in the thickness direction, belonging to the technical field of dielectric property testing for microwave and millimeter-wave materials. The single-tooth electromagnetic bandgap resonant cavity constructed by this method uses the TE test mode. 10n The electric field direction within the cavity is perpendicular to the material thickness direction, enabling the testing of dielectric properties along the Z-axis. This cavity allows for multi-frequency testing, meeting testing requirements within the 2.5GHz to 110GHz frequency range. With a quality factor greater than 3000, it offers higher testing accuracy when measuring dielectric loss. Compared to a double-tooth electromagnetic bandgap resonant cavity, a single-tooth electromagnetic bandgap resonant cavity is simpler, solving the positioning difficulties caused by the need for strict symmetry in the electromagnetic bandgap structure between the two half-cavities, while also reducing manufacturing costs. Furthermore, one side of the single-tooth electromagnetic bandgap resonant cavity is a smooth metal plate, making sample insertion through the gap more convenient.

The application provides an aluminum alloy door frame, which comprises an aluminum alloy frame body with an inner hole and connecting pieces arranged at the corners of the aluminum alloy frame body respectively. The aluminum alloy frame body comprises four aluminum alloy profiles which are connected with each other, and the connecting pieces are respectively inserted between two aluminum alloy profiles which are connected with each other. The aluminum alloy profile comprises a main body, an extension section connected to one end of the main body away from the inner hole, a sealing strip arranged on the extension section, the extension section arranged outside the window, the inner side of the extension section abutting against the wall, and the side of the main body abutting against the side of the window. The outer side of the extension section is connected with a first glass layer, and the sealing strip is overlapped between the first glass layer and the wall. The connecting pieces are inserted at the four corners of the aluminum alloy frame body, so that the overall structure of the aluminum alloy frame body is strengthened. The aluminum alloy profile is provided with the main body and the extension section, the main body is used for inserting the connecting pieces, and the connecting pieces are inserted into two adjacent main bodies when two aluminum alloy profiles are connected, so that the positioning during the connection and installation of the aluminum alloy frame body is facilitated.

This application discloses a method, apparatus, device, and storage medium for identifying transaction anomaly risks, relating to the field of anomaly detection in microservice systems. The method includes: real-time collection of transaction business data, microservice operation data, and link call data, followed by feature extraction to obtain standardized real-time multi-dimensional risk correlation features; inputting these real-time multi-dimensional risk correlation features into an adaptive optimization model to obtain preliminary risk identification results; synchronizing these features to a digital twin of the microservice transaction link; using the digital twin to simulate the current transaction flow state and generate real-time simulation risk assessment results; and combining the preliminary risk identification results with the real-time simulation risk assessment results to query a dynamic causal graph, identify risk transmission paths and root causes, and determine the final risk level. Through the above methods, this application improves the accuracy, real-time performance, and adaptability of risk identification in complex microservice environments.