Abstract: A high-frequency transformer, includes: an iron core, primary windings and secondary windings, wherein the iron core is of an integrated equilateral triangle structure, the primary windings and the secondary windings are uniformly wound around three sides of the iron core, and the primary windings and/or the secondary windings are symmetrically distributed on the three sides.

Abstract: The method for query training can include: determining a graphical representation, determining an inference network based on the graphical representation, determining a query distribution, sampling one or more train queries from the query distribution, and optionally determining a trained inference network by training the untrained inference network using the train query. The method can optionally include determining an inference query and determining an inference query result for the inference query using the trained inference network.

Abstract: The method for query training can include: determining a graphical representation, determining an inference network based on the graphical representation, determining a query distribution, sampling one or more train queries from the query distribution, and optionally determining a trained inference network by training the untrained inference network using the train query. The method can optionally include determining an inference query and determining an inference query result for the inference query using the trained inference network.

Abstract: In described examples, a method of determining whether there is an open load fault in a test circuit includes closing a first switch to couple an input voltage to a first LC filter in which a first capacitor is coupled to a ground, the first LC filter coupled to a first terminal coupled to the test circuit; and closing a second switch to couple the input voltage to a second LC filter in which a second capacitor is coupled to the ground, the second LC filter coupled to a second terminal coupled to the test circuit. After the LC filters charge to the input voltage, the second switch is opened, and the second capacitor is discharged across a discharge resistor for a specified discharge time. The voltage across the discharge resistor falling below a reference voltage indicates that there is an open load fault in the test circuit.

Abstract: The method for query training can include: determining a graphical representation, determining an inference network based on the graphical representation, determining a query distribution, sampling one or more train queries from the query distribution, and optionally determining a trained inference network by training the untrained inference network using the train query. The method can optionally include determining an inference query and determining an inference query result for the inference query using the trained inference network.

Abstract: In described examples, a method of determining whether there is an open load fault in a test circuit includes closing a first switch to couple an input voltage to a first LC filter in which a first capacitor is coupled to a ground, the first LC filter coupled to a first terminal coupled to the test circuit; and closing a second switch to couple the input voltage to a second LC filter in which a second capacitor is coupled to the ground, the second LC filter coupled to a second terminal coupled to the test circuit. After the LC filters charge to the input voltage, the second switch is opened, and the second capacitor is discharged across a discharge resistor for a specified discharge time. The voltage across the discharge resistor falling below a reference voltage indicates that there is an open load fault in the test circuit.