There are multiple definitions:

1. Senior Environmental Employment(English)

   • EPA
   • Environment

2. series elastic element(English)

   • PEE
   • Physiology

3. selective enamel-etch(English)

   • CQ, DC, FTIR, PA, POS, SBU, SE, TE, TPO, μTBS
   • Materials science, Dentistry
   • https://doi.org…ent.2013.07.007

4. Shannon energy envelope(English)

   • is calculated to delimit the beginning and end of each of heart sounds using a fixed threshold from the maximum envelope, the location of the heart sounds S1 and S2 will enable us thereafter to extract the heart murmurs using a threshold selection of them
   • ECG, FFT, FIR, PCG, RVSP
   • Cardiology, Signal analysis, Bioengineering
   • https://doi.org…79/JHV-2021/001