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Fan Zhang

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#artificial intelligence Preprint Sep 2026

EviGraph: Proof-Carrying Selective Recommendation over Temporal Public-Service Knowledge Graphs

EviGraph, which distinguishes critical decision requirements from information that can remain unresolved in a temporal knowledge graph, is introduced, suggesting that reliable evidence-based navigation depends on specifying what must be established for a decision, rather than simply adding more verification.

Yi-Xi Zhou, Si-Kun Wang, Lei Fan et al. · 0 citations
Preprint Sep 2026

A Historical Corpus Is Not a Historical System: Auditing Hindsight Leakage in Stateful Data Discovery

Offline replay should estimate what a discovery system could retrieve at a historical point, yet freezing the corpus leaves interaction memory unconstrained. We formalize point-in-time (PIT) discovery through historical state $(D_t, \theta_t, M_{<i})$ and introduce a paired replay that changes only memory availability....

Yi-Xi Zhou, Fan Zhang, Si-Kun Wang et al. · 0 citations

SQLStructEval: Structural Evaluation of LLM Text-to-SQL Generation

SQLStructEval is introduced, a framework that analyzes this behavior through canonical abstract syntax tree representations and adopts a pipeline that first generates structured intermediate representations and then deterministically compiles them into SQL, improving execution accuracy and structural agreement among co...

Yi-Xi Zhou, Fan Zhang, Zhiyu Guo et al. · 1 citation
#natural language process... Preprint Sep 2026

Same Scores, Different Decisions: Evaluating JEV and Language Models for Legal Document Understanding

Jev has the lowest cost and median response time among the evaluated configurations, while hosted language models achieve higher baseline accuracy and Rankings by baseline accuracy differ from rankings by correctness across every condition and repeat, although small differences in the latter do not establish a general...

Fan Zhang, Yan-Kai Chen, Zhuo-Han Xie et al. · 11 citations · ⚡1
Preprint Sep 2026

Prediction-Market Seed Capital Recovery from Noise-Dominant Flow

Automated prediction markets require sponsors to prefund liquidity before observing order flow, creating a financing challenge at launch. We study whether nonnegative charges conditioned on observable payoff direction can improve recovery of this prefunded capital while limiting their effect on informed participation....

Yan-Kai Chen, Bowei He, Zhuo-Han Xie et al. · 1 citation

Can Agentic Trading Systems Pay for Their Own Intelligence?

TradeLens is introduced, a trace-grounded diagnostic toolkit for evaluating agentic trading systems from their trading records, runtime traces, and deployment configurations, which reframe the evaluation of LLM-based trading agents from capability-centric performance ranking to trace-grounded diagnosis of intelligence-...

Qiqi Duan, Changlun Li, Chen Wang et al. · 0 citations

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