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Qianqian Xie

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#artificial intelligence Preprint Sep 2026

TimeLitmus: A Diagnostic Benchmark for Cross-Modal Understanding and Explanation Faithfulness in Event-Conditioned Time-Series Prediction

Large language models (LLMs) are increasingly used to make predictions from numerical time-series histories and textual events. Yet accuracy alone cannot reveal whether correct answers reflect effective integration of the two inputs or instead arise from event polarity, unimodal priors, or superficial cues. Likewise, p...

Jie Gong, Mao-Wei Jiang, Zhiwei Liu et al. · 0 citations
2025

Enhanced Expert Merging for Mixture-of-Experts in Graph Foundation Models

This work proposes a knowledge distillation-inspired expert merging method that aligns the behavior of parameter-fused experts with expert ensembles, and a theoretical parameter proximity approach that leverages the similarity of expert parameters to approximate ensemble outputs while preserving diversity.

Lei Liu, Xingyu Xia, Qianqian Xie et al. · 4 citations
Preprint Aug 2026

ShiJianBench: From Dialogue to Decision for Long-Horizon Evaluation of Investment Advisors

Experiments on Chinese fund-market traces from 2021 to 2026 identify a stable leading group of LLM advisors that combines substantially stronger personalized content with competitive investor-side trajectory outcomes.

Jie Gong, Mao-Wei Jiang, Zhiwei Liu et al. · 3 citations · ⚡1

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