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Zichang Liu

7 accepted papers

2023

Deja Vu: Contextual Sparsity for Efficient LLMs at Inference Time

ICML 2023oral

Large language models (LLMs) with hundreds of billions of parameters have sparked a new wave of exciting AI applications. However, they are computationally expensive at inference time. Sparsity is a natural approach to reduce this cost, but existing methods either require costly retraining, have to…

2023

Learning Multimodal Data Augmentation in Feature Space

ICLR 2023poster

The ability to jointly learn from multiple modalities, such as text, audio, and visual data, is a defining feature of intelligent systems. While there have been promising advances in designing neural networks to harness multimodal data, the enormous success of data augmentation currently remains lim…

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
2022

Retaining Knowledge for Learning with Dynamic Definition

NeurIPS 2022accept

Machine learning models are often deployed in settings where they must be constantly updated in response to the changes in class definitions while retaining high accuracy on previously learned definitions. A classical use case is fraud detection, where new fraud schemes come one after another. While…

Cited by 2SourcePDFScholar
2022

SAR-Net: Shape Alignment and Recovery Network for Category-Level 6D Object Pose and Size Estimation

CVPR 2022poster

Given a single scene image, this paper proposes a method of Category-level 6D Object Pose and Size Estimation (COPSE) from the point cloud of the target object, without external real pose-annotated training data. Specifically, beyond the visual cues in RGB images, we rely on the shape information pr…

Cited by 83PDFScholar
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