Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Word-based feature sets in CRFs model.
| Word feature | Wi-2, Wi-1, Wi, Wi+1, Wi+2 |
|---|---|
| 2-gram word feature | Wi-2i-1, Wi-1i, Wii+1, Wi+1i+2 |
| 3-gram word feature | Wi-3i, Wi-2i+1, Wi-1i+2, Wii+3 |
| word cluster feature | Ci-2, Ci-1, Ci, Ci+1, Ci+2 |
| 2-gram word cluster feature | Ci-2i-1, Ci-1i, Cii+1, Ci+1i+2 |
| 3-gram word cluster feature | Ci-3i, Ci-2i+1, Ci-1i+2, Cii+3 |
