Pith Number

pith:OL4TJNXF

pith:2019:OL4TJNXFROIW6IZXQH7U62N5UY

not attested not anchored not stored refs pending

A novel hybrid model based on multi-objective Harris hawks optimization algorithm for daily PM2.5 and PM10 forecasting

Jianzhou Wang, Pei Du, Tong Niu, Wendong Yang, Yan Hao

arxiv:1905.13550 v1 · 2019-05-30 · cs.LG · eess.SP · stat.AP · stat.ML

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OL4TJNXFROIW6IZXQH7U62N5UY}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:44:34.599374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72f934b6e58b916f233781ff4f69bda63cc07fc388014d0e7d884cfba62286de

Aliases

arxiv: 1905.13550 · arxiv_version: 1905.13550v1 · doi: 10.48550/arxiv.1905.13550 · pith_short_12: OL4TJNXFROIW · pith_short_16: OL4TJNXFROIW6IZX · pith_short_8: OL4TJNXF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/OL4TJNXFROIW6IZXQH7U62N5UY \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 72f934b6e58b916f233781ff4f69bda63cc07fc388014d0e7d884cfba62286de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c0d120275d6f99b564126ca60aadeb803e0980e7ade48d8e40749e25230f1a37",
    "cross_cats_sorted": [
      "eess.SP",
      "stat.AP",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-05-30T12:33:59Z",
    "title_canon_sha256": "2ad78ce4019b21229f9575df8cf218313a9054a14aba1181b56fae02994827ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.13550",
    "kind": "arxiv",
    "version": 1
  }
}