{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:TRE6T7O6DAE4HHWOKN2565LX5Z","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"9a90ee1e535fb79cd74f349b558735fe320c73e368b85c6a1b8da3fc9d8dede9","cross_cats_sorted":["math.OC"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SY","submitted_at":"2017-10-08T23:18:24Z","title_canon_sha256":"0fc861ceccf1fd59931d54e1e76a55c3ba559cf828531020badce136d25ccd8d"},"schema_version":"1.0","source":{"id":"1710.03881","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.03881","created_at":"2026-05-18T00:33:05Z"},{"alias_kind":"arxiv_version","alias_value":"1710.03881v1","created_at":"2026-05-18T00:33:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.03881","created_at":"2026-05-18T00:33:05Z"},{"alias_kind":"pith_short_12","alias_value":"TRE6T7O6DAE4","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"TRE6T7O6DAE4HHWO","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"TRE6T7O6","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:99779c6693ff5ebd237ba3bab0f4c3f1271ee46355a495572abd1bee55977257","target":"graph","created_at":"2026-05-18T00:33:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"In this paper, a robust adaptive backstepping-based controller is developed for positioning the spool valve of Electro-Hydraulic Servo System (EHSS) with parameter fluctuations. Artificial Bee Colony (ABC) algorithm is utilized to drive the parameters of the proposed controller to a good neighbourhood of the solution space. The optimization problem is formulated such that both the tracking error and control signal are minimized concurrently. The results show that the proposed controller guarantees the uniform ultimate boundedness of the tracking error and control signal. Moreover, illustrative","authors_text":"Babajide O. Ayinde, Sami El-Ferik","cross_cats":["math.OC"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SY","submitted_at":"2017-10-08T23:18:24Z","title":"Artificial Bee Colony-based Adaptive Position Control of Electrohydraulic Servo Systems with Parameter Uncertainty"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.03881","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:8ab73067db837a3a8e5e8418d20d13a8be5ca3980a64e58717b0ae096713724e","target":"record","created_at":"2026-05-18T00:33:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"9a90ee1e535fb79cd74f349b558735fe320c73e368b85c6a1b8da3fc9d8dede9","cross_cats_sorted":["math.OC"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.SY","submitted_at":"2017-10-08T23:18:24Z","title_canon_sha256":"0fc861ceccf1fd59931d54e1e76a55c3ba559cf828531020badce136d25ccd8d"},"schema_version":"1.0","source":{"id":"1710.03881","kind":"arxiv","version":1}},"canonical_sha256":"9c49e9fdde1809c39ece5375df7577ee56ee7f30306c4ffbffbecfe0be216727","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9c49e9fdde1809c39ece5375df7577ee56ee7f30306c4ffbffbecfe0be216727","first_computed_at":"2026-05-18T00:33:05.733896Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:33:05.733896Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Kqc+MusI++rbug+MiU8WIQD8SMeQIZdsdmXoaB6e3auk6uR0qkTXKsTFara8INWe6cxCSK9tuZaL0d5AJSJwDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:33:05.734522Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.03881","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ab73067db837a3a8e5e8418d20d13a8be5ca3980a64e58717b0ae096713724e","sha256:99779c6693ff5ebd237ba3bab0f4c3f1271ee46355a495572abd1bee55977257"],"state_sha256":"7b23b965560b8eb13a819612e4783edcb83107e87b1b6e7f0aca047bb1f2927a"}