{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:IE3MCBXGLV2HQNZYK6DQCS4WAL","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":"408a0e83aabcdd166e83bad307bdededef8557b6d8049397759e6b202ab42229","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2017-05-30T02:43:08Z","title_canon_sha256":"318c0061e3f8770d5b850d48e0bd640c3d8f7fb16066f714e35c58382afd452c"},"schema_version":"1.0","source":{"id":"1705.10437","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.10437","created_at":"2026-05-18T00:43:24Z"},{"alias_kind":"arxiv_version","alias_value":"1705.10437v1","created_at":"2026-05-18T00:43:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.10437","created_at":"2026-05-18T00:43:24Z"},{"alias_kind":"pith_short_12","alias_value":"IE3MCBXGLV2H","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IE3MCBXGLV2HQNZY","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IE3MCBXG","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:6ec95a99ae361e42193a560d23cd8049a5d19227474707774aad640f5b5c9ce2","target":"graph","created_at":"2026-05-18T00:43:24Z","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":"Optimization of the refrigerant circuitry can improve a heat exchanger's performance. Design engineers currently choose the refrigerant circuitry according to their experience and heat exchanger simulations. However, the design of an optimized refrigerant circuitry is difficult. The number of refrigerant circuitry candidates is enormous. Therefore, exhaustive search algorithms cannot be used and intelligent techniques must be developed to explore the solution space efficiently. In this paper, we formulate refrigerant circuitry design as a binary constrained optimization problem. We use CoilDes","authors_text":"Arvind U. Raghunathan, Christopher Laughman, Nikolaos Ploskas, Nikolaos V. Sahinidis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2017-05-30T02:43:08Z","title":"Optimization of circuitry arrangements for heat exchangers using derivative-free optimization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.10437","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":"sha256:2fc7b1aff75c163aab501662e655f00653e94a6e565123b1d13b6fdd85e97d26","target":"record","created_at":"2026-05-18T00:43:24Z","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":"408a0e83aabcdd166e83bad307bdededef8557b6d8049397759e6b202ab42229","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2017-05-30T02:43:08Z","title_canon_sha256":"318c0061e3f8770d5b850d48e0bd640c3d8f7fb16066f714e35c58382afd452c"},"schema_version":"1.0","source":{"id":"1705.10437","kind":"arxiv","version":1}},"canonical_sha256":"4136c106e65d747837385787014b9602cbeacc65404c547b159bbbdc255ad4ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4136c106e65d747837385787014b9602cbeacc65404c547b159bbbdc255ad4ae","first_computed_at":"2026-05-18T00:43:24.605857Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:24.605857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a4UY+CxW4hteTDjqJZl8qOwPtZx8Y0NoVC5zCSeKxX7QlE9HO1qoDVIYmwySSRzQueW2fIEuo1X0pYwffgPBCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:24.606483Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.10437","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2fc7b1aff75c163aab501662e655f00653e94a6e565123b1d13b6fdd85e97d26","sha256:6ec95a99ae361e42193a560d23cd8049a5d19227474707774aad640f5b5c9ce2"],"state_sha256":"0851f02c4c083c17d9fb78a5d706888c0cd7b56e179af773b6a108e313fd11ef"}