{"schema_version":"papers/paper-detail-v1","title":"Bi-Level Optimization for Single Domain Generalization","surface":"papers","opportunity_kernel":{"paper_id":"52fd728c-223c-49b3-8215-e6904cda3d87","title":"Bi-Level Optimization for Single Domain Generalization","authors":["Marzi Heidari","Hanping Zhang","Hao Yan","Yuhong Guo"],"arxiv_id":"2604.06349v1","doi":null,"published_at":"2026-04-07T18:28:42.000Z","score_object":{"overall":{"value":7,"scale":"0-10","confidence":0.85,"confidence_reason":"Backfilled from persisted papers.viability_score.","model_version":"phase0-web-fallback-v1","pipeline_version":"phase0-kernel-v1","computed_at":"2026-04-09T20:10:02.053Z","fresh_until":"2026-05-09T20:10:02.053Z","is_stale":true,"source_count":1,"missingness":[]},"technical":{"value":0,"scale":"0-10","confidence":0.15,"confidence_reason":"No canonical technical score row was available yet; marked low confidence.","model_version":"phase0-web-fallback-v1","pipeline_version":"phase0-kernel-v1","computed_at":"2026-04-09T20:10:02.053Z","fresh_until":"2026-04-23T20:10:02.053Z","is_stale":true,"source_count":0,"missingness":["paper_score_objects.technical"]},"commercial":{"value":4,"scale":"0-10","confidence":0.7,"confidence_reason":"Backfilled from persisted commercial_flags and repo availability.","model_version":"phase0-web-fallback-v1","pipeline_version":"phase0-kernel-v1","computed_at":"2026-04-09T20:10:02.053Z","fresh_until":"2026-05-09T20:10:02.053Z","is_stale":true,"source_count":1,"missingness":[]},"market":{"value":0,"scale":"0-10","confidence":0.15,"confidence_reason":"No canonical market score row was available yet; marked low confidence.","model_version":"phase0-web-fallback-v1","pipeline_version":"phase0-kernel-v1","computed_at":"2026-04-09T20:10:02.053Z","fresh_until":"2026-04-23T20:10:02.053Z","is_stale":true,"source_count":0,"missingness":["paper_score_objects.market"]},"team":{"value":0,"scale":"0-10","confidence":0.15,"confidence_reason":"No canonical team score row was available yet; marked low confidence.","model_version":"phase0-web-fallback-v1","pipeline_version":"phase0-kernel-v1","computed_at":"2026-04-09T20:10:02.053Z","fresh_until":"2026-04-23T20:10:02.053Z","is_stale":true,"source_count":0,"missingness":["paper_score_objects.team"]},"methodology":{"value":0,"scale":"0-10","confidence":0.15,"confidence_reason":"No canonical methodology score row was available yet; marked low confidence.","model_version":"phase0-web-fallback-v1","pipeline_version":"phase0-kernel-v1","computed_at":"2026-04-09T20:10:02.053Z","fresh_until":"2026-05-09T20:10:02.053Z","is_stale":true,"source_count":0,"missingness":["paper_score_objects.methodology"]}},"evidence_receipt":{"freshness":"unknown","proof_status":"unverified","repo_status":"missing","references_count":0,"source_count":0,"coverage":0,"missingness":["paper_evidence_receipts.references_count","paper_evidence_receipts.coverage"],"unresolved_unknowns":["Canonical evidence receipt has not been materialized yet."],"last_verification_at":"2026-04-09T20:10:02.053Z"},"lineage_hash":"b6d087929ed4c548fbca1807c23516e98722d643a0879ab623c9a52e050b7b75"},"distribution":null,"replication_evidence":[],"author_dna":[]}