Single-phase generator The early generators for those single-phase traction networks are single-phase generators. Even with newer three-phase motors which were introduced to some modern trains, the single-phases transmission for traction networks survive their time and are still in use in many railways today. However, many traction power stations have replaced their generators over time to use three-phase generators and convert into single-phase for transmission. In the early development of hydroelectricity, single-phase generators played an important role in demonstrating the benefits of alternating current. In 1891, a 3,000 volts and 133 Hz single-phase generator of 100 horsepower was installed at Ames Hydroelectric Generating
Single-entry single-exit Single-entry single-exit In graph theory, a single-entry single-exit (SESE) region in a given graph is an ordered edge pair ("a", "b") of distinct control flow edges "a" and "b" where: where a node "x" is said to dominate node "y" in a directed graph if every path from start to "y" includes "x". A node "x" is said to postdominate a node "y" if every path from "y" to end includes "x". So, "a" and "b" refer to the entry and exit edge, respectively. The first condition ensures that every path from start into the region passes through the region’s