Qi Liu

Xudong Lu, Aojun Zhou, Ziyi Lin et al. · salesforce

Recent developments in large-scale pre-trained text-to-image diffusion models have significantly improved the generation of high-fidelity images, particularly with the emergence of diffusion transformer models (DiTs). Among diffusion models, diffusion transformers have demonstrated superior image-generation capabilities, boosting lower FID scores and higher scalability. However, deploying large-scale DiT models can be expensive due to their excessive parameter numbers. Although existing research has explored efficient deployment techniques for diffusion models, such as model quantization, there is still little work concerning DiT-based models. To tackle this research gap, we propose TerDiT, the first quantization-aware training (QAT) and efficient deployment scheme for extremely low-bit diffusion transformer models. We focus on the ternarization of DiT networks, with model sizes ranging from 600M to 4.2B, and image resolution from 256$\times$256 to 512$\times$512. Our work contributes to the exploration of efficient deployment of large-scale DiT models, demonstrating the feasibility of training extremely low-bit DiT models from scratch while maintaining competitive image generation capacities compared to full-precision models. Our code and pre-trained TerDiT checkpoints have been released at https://github.com/Lucky-Lance/TerDiT.

Baozhu Zhao, Qiwei Xiong, Xiaohan Zhang et al.

Three-dimensional point cloud anomaly detection that aims to detect anomaly data points from a training set serves as the foundation for a variety of applications, including industrial inspection and autonomous driving. However, existing point cloud anomaly detection methods often incorporate multiple feature memory banks to fully preserve local and global representations, which comes at the high cost of computational complexity and mismatches between features. To address that, we propose an unsupervised point cloud anomaly detection framework based on joint local-global features, termed PointCore. To be specific, PointCore only requires a single memory bank to store local (coordinate) and global (PointMAE) representations and different priorities are assigned to these local-global features, thereby reducing the computational cost and mismatching disturbance in inference. Furthermore, to robust against the outliers, a normalization ranking method is introduced to not only adjust values of different scales to a notionally common scale, but also transform densely-distributed data into a uniform distribution. Extensive experiments on Real3D-AD dataset demonstrate that PointCore achieves competitive inference time and the best performance in both detection and localization as compared to the state-of-the-art Reg3D-AD approach and several competitors.

Qingyang Mao, Qi Liu, Zhi Li et al.

In recent years, table reasoning has garnered substantial research interest, particularly its integration with Large Language Models (LLMs) which revolutionize natural language applications. Existing typical LLM-based studies realize step-by-step reasoning, promoting the capabilities in table understanding and analyzing. While these approaches emphasize autonomous exploration to accomplish the task objective, they overlook systematic thinking in the reasoning process, leading to potential risks of omitted steps, disorganized logic and misleading results. In this paper, we propose PoTable, a novel stage-oriented plan-then-execute reasoning approach that achieves systematic thinking on tables. Specifically, PoTable deploys several distinct tabular analytical stages with clear objectives and achieves stage-by-stage reasoning. To accomplish the stage-specific goal, PoTable conducts plan-then-execute reasoning, which first plans the operation chain under the stage objective, and then executes each operation sequentially through code generation, real-time running and feedback processing. As a result, PoTable can produce reliable table reasoning results with highly accurate, steply commented and completely executable programs. It possesses a high degree of alignment with a distinguished tabular data analyst, offering advantages of high accuracy and explainability. Finally, we conduct extensive experiments over four evaluation datasets from WikiTQ and TabFact benchmarks, where the results demonstrate the effectiveness of PoTable, as well as the efficiency and explainability.