Pith Number

pith:RKJWQVOD

pith:2026:RKJWQVODLBFYD66CXZ5XBL5YI4

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SPAMoE: Spectrum-Aware Hybrid Operator Framework for Full-Waveform Inversion

Chenfei Liao, Lei Zhang, Peiyuan Li, Ruoyu Wu, Yongxiang Shi, Zhenyu Wang

SPAMoE uses spectrum-aware routing to cut errors in learning-based full-waveform inversion by 44 percent.

arxiv:2604.07421 v3 · 2026-04-08 · cs.LG

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\pithnumber{RKJWQVODLBFYD66CXZ5XBL5YI4}

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4 Citations open

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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.

Claims

C1strongest claim

On the ten OpenFWI sub-datasets, experiments show that SPAMoE reduces the average MAE by 44.4% relative to the best officially reported OpenFWI baseline, thereby establishing a new architectural framework for learning-based full-waveform inversion.

C2weakest assumption

That frequency entanglement is the primary limitation of prior CNNs and single-paradigm neural operators in FWI, and that the Spectral-Preserving DINO Encoder plus frequency-band MoE routing will reliably mitigate it across varied geological settings without introducing new instabilities or overfitting.

C3one line summary

SPAMoE reduces average MAE by 44.4% on OpenFWI datasets for full-waveform inversion via a spectral-preserving DINO encoder and dynamic frequency-band routing to specialized neural operators.

Receipt and verification

First computed	2026-06-09T01:05:16.991153Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8a936855c3584b81fbc2be7b70afb84733410514f36d03ac71b3f94817a00719

Aliases

arxiv: 2604.07421 · arxiv_version: 2604.07421v3 · doi: 10.48550/arxiv.2604.07421 · pith_short_12: RKJWQVODLBFY · pith_short_16: RKJWQVODLBFYD66C · pith_short_8: RKJWQVOD

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/RKJWQVODLBFYD66CXZ5XBL5YI4 \
  | 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: 8a936855c3584b81fbc2be7b70afb84733410514f36d03ac71b3f94817a00719

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fde700dd3b216dfab268fc1de11ce5a5658454a221d97631577eabbc5217804",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-04-08T15:21:06Z",
    "title_canon_sha256": "7ffc466322997834ee6de6a53a7273aef845592172183039f78c59a6d878a562"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.07421",
    "kind": "arxiv",
    "version": 3
  }
}