U.S. railroads are making gains toward meeting the yearend deadline for having automatic train control systems in place, but nine commuter-rail lines remain “at risk” of failing to hit that target, ...
WASHINGTON -- U.S. railroads will not be able to meet a year-end deadline for installing automatic speed control devices, the lack of which contributed to the fatal Amtrak crash in Philadelphia, ...
Designing the compensation network in a DC/DC converter can be a mystery if one does not know where to place the poles and zeros of the error amplifier and how much ...
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