Equation 1 · Part 7 · Edge AI Electronics and Sensor Systems in Practice: An Advanced Technical Guide
Starting index or lower bound: i
What this part means
This label says where the repeated addition, multiplication, or accumulation starts. Read its value or condition together with the article’s description of the index.
Its job in the formula
i appears in the bound of this sum. The bound states where the repeated operation starts, ends, or which values it includes.
Full expression→Starting index or lower bound: i→Article meaning
The passage around this formula
…on unverified vendor numbers stacked several layers deep; a single shunt measurement campaign, even a short one, converts most of that stack into fact. Here is the fraction of time the device spends in power state i (sleep, always-on monitoring, escalated inference, radio) and is the measured — not datasheet-typical — power draw in that state. This formulation is worth writing out because it exposes the one lever that dominates every other design decision: since is normally close to one…
Learn the underlying idea
Σ adds a collection of terms. Π multiplies them. The lower and upper labels tell you which terms belong to the collection.
Open the illustrated sums and products: repeat an operation over an index guide →
See this notation across published equations →
Sources cited in the article section
- [8] Hello Edge: Keyword Spotting on Microcontrollers ↗
- [10] Sub-mW Keyword Spotting on an MCU: Analog Binary Feature Extraction and Binary Neural Networks ↗
- [3] MLPerf Tiny Benchmark ↗
These citations provide research context; check each source for the exact claim it supports.