Part 1 in this series covered defrost cycle problems in heat pumps. Now, let's discuss the second major winter issue: heat pumps stuck in one mode. The customer calls and says the system won't switch ...

Abstract: By using a carrier-based pulse width modulation, this paper presents a developed phase-shift space vector modulation strategy for a nine-switch inverter to overcome one of major drawbacks, i ...

A man shows a sign mentioning US President Donald Trump during a rally in support of nationwide protests in Iran, in Rome, Italy, January 13, 2026. File Image/Reuters United States President Donald ...

News yesterday that Danish carrier Maersk is taking its first structural step back into the Red Sea has analysts voicing caution that this could mark the start of big shift from the Cape of Good Hope ...

Abstract: This brief presents a fuzzy decoupling control (FDC) system to control the top pressure of a blast furnace (BF). First, a dynamic mathematical model of the top pressure is carried out based ...