Equation 8 · Part 1 · Edge AI Electronics and Sensor Systems in 2035: Scenarios, Signals, and Falsifiable Predictions

Symbol eta

\eta(t)

\eta

What this part means

the achieved energy efficiency of the best available accelerator at time t , measured in tera-operations per second per watt.

Its job in the formula

eta is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Full expressionSymbol etaArticle meaning

Where the article explains it

If $P_{\text{budget}}$ is the (roughly fixed, application-set) power envelope in watts and $\eta(t)$ is the achieved energy efficiency of the best available accelerator at time t , measured in tera-operations per second per watt, then the usable on-device compute throughput is approximately $C_{\text{edge}}(t)$ $\approx$ $P_{\text{budget}}$ $\cdot$ $\eta(t)$ .

The passage around this formula

$\eta(t)$ itself is not free to grow indefinitely inside conventional CMOS. Horowitz, Alon, and Patil’s widely cited analysis of chip power scaling made the mechanism explicit: as feature size shrank across recent nodes, supply voltage and threshold voltage stopped scaling down at the historical rate,…

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Learn the underlying idea

A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.

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Sources cited in the surrounding passage

[11] Scaling, Power, and the Future of CMOS ↗

These citations provide research context; check each source for the exact claim it supports.