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Jian Xu

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#machine learning Preprint Sep 2026

Large Language Bayes Is Not Reparameterisation-Invariant

Large Language Bayes (LLB) answers an informal modelling question by sampling candidate probabilistic programs from a language model, running approximate inference on each, and averaging them with weights proportional to an exponentiated evidence bound. We show that this weighting depends on how a model is written. The...

Jian Xu · 0 citations
#machine learning Preprint Sep 2026

What Does a Stream Model Buy You in Flow Matching?

Stream-level flow matching replaces the linear interpolant of conditional flow matching (CFM) by a Gaussian-process (GP) stream connecting each source--target pair, and reports lower sample error than \icfm{} on 2-Gaussian, MNIST and CIFAR-10 benchmarks. We ask what such a stream model actually contributes. Three resul...

Jian Xu · 0 citations

Consist-Retinex: One-Step Noise-Emphasized Consistency Training Accelerates High-Quality Retinex Enhancement

Consist-Retinex is proposed, which first uses a Retinex Transformer Decomposition Network to obtain paired reflectance and illumination maps, then trains two conditional consistency models with a Retinex-aware dual objective and adaptive noise-emphasized fixed-point sampling.

Jian Xu, Wei Chen, Shigui Li et al. · 0 citations

Neural Bridge Processes

The results suggest that bridge-anchored generative paths provide a general mechanism for strengthening conditional stochastic function modeling.

Jian Xu, Yican Liu, Qi-Bin Zhao et al. · 0 citations
#machine learning Preprint Sep 2026

Don't Read the Log: Execution Traces Contaminate Verifiers in Video-Generation Agents

Agentic video-generation systems close a loop between a generator and a verifier: an LLM plans shots, calls a text-to-video model, and a multimodal judge decides whether the result satisfies the request. To diagnose where a long workflow fails, recent harnesses deliberately show the judge more than the video-the agent'...

Jian Xu · 0 citations
#machine learning Preprint Aug 2026

Partially Observed Sparse Graphs: The Unknown Sampling Rate is a Tail Index

A large graph is often available only in part: a crawl stopped by its budget, a panel, a partial dump. When the sampled fraction $s$ is known by design the total edge count follows from $\hat e=e_s/s^2$ and no model is needed. We treat the case where $s$ is unknown and the population size is known. Our main result is a...

Jian Xu, Delu Zeng, John W. Paisley et al. · 0 citations
#machine learning Preprint Aug 2026

Intervention, Not Shared Latents: Blocking Visual Shortcuts in Audio-Video Generation

It is proved that counterfactual invariance is necessary and sufficient to identify the causal predictor, and the mechanism from feature-vector SCMs to procedural pixel video, real images with spectrogram audio, moving real digits, and a conditional generator is verified.

Jian Xu, Delu Zeng, John W. Paisley · 0 citations
Open access Aug 2026

Adaptive Momentum Langevin Dynamics for Efficient Posterior Sampling

Adaptive Momentum Langevin Dynamics (AMLD), a practical stochastic correction kernel that introduces a momentum variable into the annealed posterior sampling framework and equips it with an annealing-aware momentum retention schedule, is proposed.

Zhengbo Li, Jian Xu, Ding-Tao Peng et al. · 0 citations
Preprint Jul 2026

Entanglement as a Structural Complexity Axis: A PAC-Bayesian View of Generalization in Quantum Policies and Value Functions

A PAC-Bayesian account in which quantum policy design is reframe around an entanglement--generalization trade-off rather than expressivity alone is given, where entangled circuits consistently generalize worse than non-entangled circuits of equal parameter count.

Jian Xu, Delu Zeng, John W. Paisley et al. · 0 citations
Preprint Jul 2026

When Can You Debias an LLM Judge? Identifiability Limits, a Test, and Designs for Top-k Ranking

The contribution is accordingly not a better estimator but a characterization of \emph{when prior-based correction is justified}, plus designs that supply the missing information when it is not, plus designs that supply the missing information when it is not.

Jian Xu, Delu Zeng, John W. Paisley et al. · 0 citations

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