Abstract: Disclosed are a shield tunnel segment structure and a construction method thereof. The shield tunnel segment structure includes segment blocks sequentially spliced in a circumferential direction. Each segment block forms a closed annular segment structure, and outer diameters of adjacent annular segment structures gradually increase in an axial direction. At least two adjacent segment blocks of the same annular segment structure form an annular inner groove, and at least one segment block of the adjacent annular segment structures is provided with an inner bump which matches the annular inner groove. At least two adjacent segment blocks of the same annular segment structure form an annular outer groove, and at least one segment block of the adjacent annular segment structures is provided with an outer bump which matches the annular outer groove. The annular outer grooves and the annular inner grooves are staggered in the circumferential direction.

Abstract: Techniques are disclosed relating to machine learning techniques for determining geographic coordinates for an address. In some embodiments, a computer system may access address information for an address that includes one or more address elements. Based on this address information, the computer system, in some embodiments, may use a machine learning model to geographic coordinates for the address. For example, a tokenization layer of the machine learning model may generate token values based on the address elements in the address, and an embedding layer of the model may create corresponding word-embedding values based on these token values. Based on the word-embedding values, an encoder layer may generate comparative vectors that may then be decoded by a decoder layer into first and second decoded values. The first and second decoded values may then be converted into geographic coordinates for the address by an output layer of the machine learning model.

Abstract: Techniques are disclosed relating to determining validity of a flagged transaction in a transaction service. A server computer system may receive an indication of a flagged transaction between a sending user and a receiving user of a transaction service. The server computer system may collect, responsive to the indication, transaction information including sender information and receiver information, and then determine a similarity value indicative of an amount of similarity between the sender information and the receiver information. The server computer system may assess, based on the similarity value, whether the flagged transaction is valid.