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Equation 5 · Part 1 · How Edge AI Electronics and Sensor Systems Actually Work

Symbol E_inference

Einference=Pactive⋅tactiveE_{\text{inference}} = P_{\text{active}} \cdot t_{\text{active}}
EinferenceE_{\text{inference}}

What this part means

the energy an inference actually costs.

Its job in the formula

EiE_inference is part of the quantity the equation computes from the expression on the right.

Where the article explains it

A useful way to make this concrete rather than hand-wavy is a simple energy identity: the energy an inference actually costs is

The passage around this formula

Once a signal has been conditioned, digitized and gated by an appropriate wake mechanism, the question becomes what a microcontroller-class processor can actually afford to compute with the power that remains. A useful way to make this concrete rather than hand-wavy is a simple energy identity: the energy an inference actually costs is Einference=Pactive⋅tactiveE_{\text{inference}} = P_{\text{active}} \cdot t_{\text{active}}. and the sustainable average power of an always-on system operating at duty cycle d (the fraction of time spent active rather than in a low-power sleep state) is

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A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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Sources cited in the article section

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