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Zhaozhuo Xu

44 accepted papers

2026

Mitigating Non-IID Drift in Zeroth-Order Federated LLM Fine-Tuning with Transferable Sparsity

ICLR 2026poster

Federated Learning enables collaborative fine-tuning of Large Language Models (LLMs) across decentralized Non-Independent and Identically Distributed (Non-IID) clients, but such models' massive parameter sizes lead to significant memory and communication challenges. This work introduces Meerkat, a s…

Cited by 0SourceScholar
2026

Randomized Antipodal Search Done Right for Data Pareto Improvement of LLM Unlearning

ICLR 2026poster

Large language models (LLMs) sometimes memorize undesirable knowledge, which must be removed after deployment. Prior work on machine unlearning has focused largely on optimization methods that adjust parameters to enforce forgetting while preserving retention. However, these approaches assume that t…

Cited by 0SourceScholar
2026

Scout Before You Attend: Sketch-and-Walk Sparse Attention for Efficient LLM Inference

ICML 2026poster

Self-attention dominates the computational and memory cost of long-context LLM inference across both prefill and decode phases. To address this challenge, we introduce **Sketch\&Walk** Attention, a training-free sparse attention method that determines sparsity with lightweight sketches and determini…

Cited by 0SourceScholar
2026

To Compress or Not? Pushing the Frontier of Lossless GenAI Model Weights Compression with Exponent Concentration

ICLR 2026poster

The scaling of Generative AI (GenAI) models into the hundreds of billions of parameters makes low-precision computation indispensable for efficient deployment. We argue that the fundamental solution lies in developing low-precision \emph{floating-point} formats, which inherently provide numerical st…

Cited by 0SourcecodeScholar
2025

ALinFiK: Learning to Approximate Linearized Future Influence Kernel for Scalable Third-Parity LLM Data Valuation

NAACL 2025long

Large Language Models (LLMs) heavily rely on high-quality training data, making data valuation crucial for optimizing model performance, especially when working within a limited budget. In this work, we aim to offer a third-party data valuation approach that benefits both data providers and model de…

2025

DEL-ToM: Inference-Time Scaling for Theory-of-Mind Reasoning via Dynamic Epistemic Logic

EMNLP 2025

Theory-of-Mind (ToM) tasks pose a unique challenge for large language models (LLMs), which often lack the capability for dynamic logical reasoning. In this work, we propose DEL-ToM, a framework that improves verifiable ToM reasoning through inference-time scaling rather than architectural changes. O

2025

Dynamic Maintenance of Kernel Density Estimation Data Structure: From Practice to Theory

UAI 2025

Kernel density estimation (KDE) stands out as a challenging task in machine learning. The problem is defined in the following way: given a kernel function $f(x,y)$ and a set of points $\{x_1, x_2, \cdots, x_n \} \subset \mathbb{R}^d$, we would like to compute $\frac{1}{n}\sum_{i=1}^{n} f(x_i,y)$ for

Cited by 0SourcePDFScholar
2025

Position: Iterative Online-Offline Joint Optimization is Needed to Manage Complex LLM Copyright Risks

ICML 2025poster

The infringement risks of LLMs have raised significant copyright concerns across different stages of the model lifecycle. While current methods often address these issues separately, this position paper argues that the LLM copyright challenges are inherently connected, and independent optimization o…

Cited by 0SourcePDFScholar
2025

Profiling LLM’s Copyright Infringement Risks under Adversarial Persuasive Prompting

EMNLP 2025

Large Language Models (LLMs) have demonstrated impressive capabilities in text generation but raise concerns regarding potential copyright infringement. While prior research has explored mitigation strategies like content filtering and alignment, the impact of adversarial persuasion techniques in el

2025

Rescorla-Wagner Steering of LLMs for Undesired Behaviors over Disproportionate Inappropriate Context

EMNLP 2025

Incorporating external context can significantly enhance the response quality of Large Language Models (LLMs). However, real-world contexts often mix relevant information with disproportionate inappropriate content, posing reliability risks. How do LLMs process and prioritize mixed context? To study

2025

Retrieval Augmented Zero-Shot Enzyme Generation for Specified Substrate

ICML 2025poster

Generating novel enzymes for target molecules in zero-shot scenarios is a fundamental challenge in biomaterial synthesis and chemical production. Without known enzymes for a target molecule, training generative models becomes difficult due to the lack of direct supervision. To address this, we propo…

Cited by 0SourcePDFScholar
2025

Sketch to Adapt: Fine-Tunable Sketches for Efficient LLM Adaptation

ICML 2025poster

Adapting pre-trained large language models (LLMs) is crucial but challenging due to their enormous size. Parameter-efficient fine-tuning (PEFT) techniques typically employ additive adapters applied to frozen model weights. To further reduce memory usage, model weights are often compressed through qu…

Cited by 0SourcePDFScholar
2025

Taming Language Models for Text-attributed Graph Learning with Decoupled Aggregation

ACL 2025long

Text-attributed graphs (TAGs) are prevalent in various real-world applications, including academic networks, e-commerce platforms, and social networks. Effective learning on TAGs requires leveraging both textual node features and structural graph information. While language models (LMs) excel at pro…

Cited by 0SourcePDFScholar
2025

Word Salad Chopper: Reasoning Models Waste A Ton Of Decoding Budget On Useless Repetitions, Self-Knowingly

EMNLP 2025

Large Reasoning Models (LRMs) are often bottlenecked by the high cost of output tokens. We show that a significant portion of these tokens are useless self-repetitions — what we call “word salad” — that exhaust the decoding budget without adding value. Interestingly, we observe that LRMs are self-aw

Cited by 0SourcePDFScholar
2025

Zeroth-Order Fine-Tuning of LLMs with Transferable Static Sparsity

ICLR 2025poster

Zeroth-order optimization (ZO) is a memory-efficient strategy for fine-tuning Large Language Models using only forward passes. However, applying ZO fine-tuning in memory-constrained settings such as mobile phones and laptops remains challenging since these settings often involve weight quantization,…

Cited by 0SourcePDFScholar
2024

FinCon: A Synthesized LLM Multi-Agent System with Conceptual Verbal Reinforcement for Enhanced Financial Decision Making

NeurIPS 2024poster

Large language models (LLMs) have demonstrated notable potential in conducting complex tasks and are increasingly utilized in various financial applications. However, high-quality sequential financial investment decision-making remains challenging. These tasks require multiple interactions with a vo…

2024

GNNs Also Deserve Editing, and They Need It More Than Once

ICML 2024poster

Suppose a self-driving car is crashing into pedestrians, or a chatbot is instructing its users to conduct criminal wrongdoing; the stakeholders of such products will undoubtedly want to patch these catastrophic errors as soon as possible. To address such concerns, *Model Editing:* the study of effic…

2024

In Defense of Structural Sparse Adapters for Concurrent LLM Serving

EMNLP 2024finding

Adapting large language models (LLMs) to specific tasks remains challenging due to the extensive retraining required, prompting the need for efficient adapter techniques. Despite this, the concurrent serving of multiple adapters, each with unique matrix shapes, poses significant system-level challen…

Cited by 2SourcePDFScholar
2024

KIVI: A Tuning-Free Asymmetric 2bit Quantization for KV Cache

ICML 2024poster

Efficiently serving large language models (LLMs) requires batching many requests together to reduce the cost per request. Yet, the key-value (KV) cache, which stores attention keys and values to avoid re-computations, significantly increases memory demands and becomes the new bottleneck in speed and…

2024

KV Cache Compression, But What Must We Give in Return? A Comprehensive Benchmark of Long Context Capable Approaches

EMNLP 2024finding

Long context capability is a crucial competency for large language models (LLMs) as it mitigates the human struggle to digest long-form texts. This capability enables complex task-solving scenarios such as book summarization, code assistance, and many more tasks that are traditionally manpower-inten…

2024

KV Cache is 1 Bit Per Channel: Efficient Large Language Model Inference with Coupled Quantization

NeurIPS 2024poster

Efficient deployment of Large Language Models (LLMs) requires batching multiple requests together to improve throughput. As batch size, context length, or model size increases, the size of key and value (KV) cache quickly becomes the main contributor to GPU memory usage and the bottleneck of inferen…

Cited by 23SourcePDFScholar
2024

Knowledge Graphs Can be Learned with Just Intersection Features

ICML 2024poster

Knowledge Graphs (KGs) are potent frameworks for knowledge representation and reasoning. Nevertheless, KGs are inherently incomplete, leaving numerous uncharted relationships and facts awaiting discovery. Deep learning methodologies have proven effective in enhancing KG completion by framing it as a…

Cited by 3SourcePDFScholar
2024

NoMAD-Attention: Efficient LLM Inference on CPUs Through Multiply-add-free Attention

NeurIPS 2024poster

Large Language Model (LLM) inference on Central Processing Units (CPU) is challenging due to the vast quantities of Multiply-Add (MAD) matrix operations in the attention computations. This paper highlights a rare gem in modern CPUs, Single-Instruction-Multiple-Data (SIMD) registers, which allows fo…

2024

QUEST: Efficient Extreme Multi-Label Text Classification with Large Language Models on Commodity Hardware

EMNLP 2024finding

Extreme multi-label text classification (EMTC) involves predicting multiple labels from a vast pool of candidates based on a user’s textual query. While traditional BERT-based methods have shown limited success, large language models (LLMs) have brought new possibilities. It is promising to leverage…

Cited by 1SourcePDFScholar
2024

SIRIUS : Contexual Sparisty with Correction for Efficient LLMs

NeurIPS 2024poster

With the blossom of large language models (LLM), inference efficiency becomes increasingly important. Various approximate methods are proposed to reduce the cost at inference time. Contextual Sparsity (CS) is appealing for its training-free nature and its ability to reach a higher compression ratio…

2024

ScaleLLM: A Resource-Frugal LLM Serving Framework by Optimizing End-to-End Efficiency

EMNLP 2024industry

Large language models (LLMs) have surged in popularity and are extensively used in commercial applications, where the efficiency of model serving is crucial for the user experience. Most current research focuses on optimizing individual sub-procedures, e.g. local inference and communication, however…

Cited by 7SourcePDFScholar
2024

Soft Prompt Recovers Compressed LLMs, Transferably

ICML 2024poster

Model compression is one of the most popular approaches to improve the accessibility of Large Language Models (LLMs) by reducing their memory footprint. However, the gaining of such efficiency benefits often simultaneously demands extensive engineering efforts and intricate designs to mitigate the p…

2024

TVE: Learning Meta-attribution for Transferable Vision Explainer

ICML 2024poster

Explainable machine learning significantly improves the transparency of deep neural networks. However, existing work is constrained to explaining the behavior of individual model predictions, and lacks the ability to transfer the explanation across various models and tasks. This limitation results i…

2024

TensorOpera Router: A Multi-Model Router for Efficient LLM Inference

EMNLP 2024industry

With the rapid growth of Large Language Models (LLMs) across various domains, numerous new LLMs have emerged, each possessing domain-specific expertise. This proliferation has highlighted the need for quick, high-quality, and cost-effective LLM query response methods. Yet, no single LLM exists to ef…

Cited by 10SourcePDFScholar
2024

Token-wise Influential Training Data Retrieval for Large Language Models

ACL 2024long

Given a Large Language Model (LLM) generation, how can we identify which training data led to this generation? In this paper, we proposed RapidIn, a scalable framework adapting to LLMs for estimating the influence of each training data. The proposed framework consists of two stages: caching and retr…

2023

A Tale of Two Efficient Value Iteration Algorithms for Solving Linear MDPs with Large Action Space

AISTATS 2023poster

Markov Decision Process (MDP) with large action space naturally occurs in many applications such as language processing, information retrieval, and recommendation system. There have been various approaches to solve these MDPs through value iteration (VI). Unfortunately, all VI algorithms require exp…

Cited by 8SourcePDFScholar
2023

Graph Self-supervised Learning via Proximity Distribution Minimization

UAI 2023poster

Self-supervised learning (SSL) for graphs is an essential problem since graph data are ubiquitous and labeling can be costly. We argue that existing SSL approaches for graphs have two limitations. First, they rely on corruption techniques such as node attribute perturbation and edge dropping to gene…

Cited by 0SourcePDFScholar
2023

One-Pass Distribution Sketch for Measuring Data Heterogeneity in Federated Learning

NeurIPS 2023poster

Federated learning (FL) is a machine learning paradigm where multiple client devices train models collaboratively without data exchange. Data heterogeneity problem is naturally inherited in FL since data in different clients follow diverse distributions. To mitigate the negative influence of data h…

2023

Scissorhands: Exploiting the Persistence of Importance Hypothesis for LLM KV Cache Compression at Test Time

NeurIPS 2023poster

Large language models(LLMs) have sparked a new wave of exciting AI applications. Hosting these models at scale requires significant memory resources. One crucial memory bottleneck for the deployment stems from the context window. It is commonly recognized that model weights are memory hungry; howeve…

Cited by 200SourcePDFScholar
2023

Winner-Take-All Column Row Sampling for Memory Efficient Adaptation of Language Model

NeurIPS 2023poster

As the model size grows rapidly, fine-tuning the large pre-trained language model has become increasingly difficult due to its extensive memory usage. Previous works usually focus on reducing the number of trainable parameters in the network. While the model parameters do contribute to memory usag…

2022

DRAGONN: Distributed Randomized Approximate Gradients of Neural Networks

ICML 2022spotlight

Data-parallel distributed training (DDT) has become the de-facto standard for accelerating the training of most deep learning tasks on massively parallel hardware. In the DDT paradigm, the communication overhead of gradient synchronization is the major efficiency bottleneck. A widely adopted approac…

Cited by 16SourcePDFScholar
2022

Structural Contrastive Representation Learning for Zero-shot Multi-label Text Classification

EMNLP 2022finding

Zero-shot multi-label text classification (ZMTC) is a fundamental task in natural language processing with applications in the cold start problem of recommendation systems. Ideally, one would learn an expressive representation of both input text and label features so that ZMTC is transformed into a…

Cited by 13SourcePDFScholar
2021

Breaking the Linear Iteration Cost Barrier for Some Well-known Conditional Gradient Methods Using MaxIP Data-structures

NeurIPS 2021poster

Conditional gradient methods (CGM) are widely used in modern machine learning. CGM's overall running time usually consists of two parts: the number of iterations and the cost of each iteration. Most efforts focus on reducing the number of iterations as a means to reduce the overall running time. In…

Cited by 36SourcePDFScholar
2021

MONGOOSE: A Learnable LSH Framework for Efficient Neural Network Training

ICLR 2021oral

Recent advances by practitioners in the deep learning community have breathed new life into Locality Sensitive Hashing (LSH), using it to reduce memory and time bottlenecks in neural network (NN) training. However, while LSH has sub-linear guarantees for approximate near-neighbor search in theory, i…

Cited by 88SourcePDFScholar
2021

Raw Nav-merge Seismic Data to Subsurface Properties with MLP based Multi-Modal Information Unscrambler

NeurIPS 2021poster

Traditional seismic inversion (SI) maps the hundreds of terabytes of raw-field data to subsurface properties in gigabytes. This inversion process is expensive, requiring over a year of human and computational effort. Recently, data-driven approaches equipped with Deep learning (DL) are envisioned t…

Cited by 9SourcePDFScholar