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The secret Python switch: How one flag makes your scripts run faster

When you're trying to get the best performance out of Python, most developers immediately jump to complex algorithmic fixes, using C extensions, or obsessively running profiling tools. However, one of ...
IEEE

High-Precision Speed Control Using Disturbance Observer Incorporated Variable Reaching Law Super-Twisting Sliding Mode Control

Abstract: Super-twisting sliding mode (STM) control offers advantages, such as fast response and low demand on motor model accuracy, and is attractive for the permanent magnet synchronous motor (PMSM) ...
Reuters

China imposes export controls on 20 Japanese entities to curb ‘remilitarisation’

China targets Japanese entities it says supply military Beijing adds 20 other Japanese entities to export controls' watch list Japan says measures 'completely unacceptable', demands withdrawal BEIJING ...
The New York Times

Mogul skiers have shown speed and grace at Milan Cortina but what about their knees?

Moguls are judged in three areas — turns, air and speed. Cameron Spencer / Getty Images As their knees bob up and down like coiled springs, directing their skis between the small mounds of packed snow ...
IEEE

Adaptive Speed Control for a DC Motor Using DC/DC Converters: An Inverse Optimal Control Approach

Abstract: This paper proposes an adaptive speed control strategy for DC motors using a DC/DC converter (in buck and boost modes) based on the inverse optimal control (IOC) approach. Our proposal ...