由于表现强劲，预用的语言模型已成为许多NLP任务的标准方法，但他们培训价格昂贵。我们提出了一个简单高效的学习框架TLM，不依赖于大规模预制。给定一些标记的任务数据和大型常规语料库，TLM使用任务数据作为查询来检索一般语料库的微小子集，并联合优化任务目标和从头开始的语言建模目标。在四个域中的八个分类数据集上，TLM实现了比预用语言模型（例如Roberta-Light）更好地或类似的结果，同时减少了两个数量级的训练拖鞋。高精度和效率，我们希望TLM将有助于民主化NLP并加快发展。

Body Mass Index (BMI), age, height and weight are important indicators of human health conditions, which can provide useful information for plenty of practical purposes, such as health care, monitoring and re-identification. Most existing methods of health indicator prediction mainly use front-view body or face images. These inputs are hard to be obtained in daily life and often lead to the lack of robustness for the models, considering their strict requirements on view and pose. In this paper, we propose to employ gait videos to predict health indicators, which are more prevalent in surveillance and home monitoring scenarios. However, the study of health indicator prediction from gait videos using deep learning was hindered due to the small amount of open-sourced data. To address this issue, we analyse the similarity and relationship between pose estimation and health indicator prediction tasks, and then propose a paradigm enabling deep learning for small health indicator datasets by pre-training on the pose estimation task. Furthermore, to better suit the health indicator prediction task, we bring forward Global-Local Aware aNd Centrosymmetric Encoder (GLANCE) module. It first extracts local and global features by progressive convolutions and then fuses multi-level features by a centrosymmetric double-path hourglass structure in two different ways. Experiments demonstrate that the proposed paradigm achieves state-of-the-art results for predicting health indicators on MoVi, and that the GLANCE module is also beneficial for pose estimation on 3DPW.

学习在线推荐模型的关键挑战之一是时间域移动，这会导致培训与测试数据分布之间的不匹配以及域的概括错误。为了克服，我们建议学习一个未来的梯度生成器，该生成器可以预测培训未来数据分配的梯度信息，以便可以对建议模型进行培训，就像我们能够展望其部署的未来一样。与批处理更新相比，我们的理论表明，所提出的算法达到了较小的时间域概括误差，该误差通过梯度变异项在局部遗憾中衡量。我们通过与各种代表性基线进行比较来证明经验优势。

基于视觉的机器人组装是一项至关重要但具有挑战性的任务，因为与多个对象的相互作用需要高水平的精度。在本文中，我们提出了一个集成的6D机器人系统，以感知，掌握，操纵和组装宽度，以紧密的公差。为了提供仅在现成的RGB解决方案的情况下，我们的系统建立在单眼6D对象姿势估计网络上，该估计网络仅使用合成图像训练，该图像利用了基于物理的渲染。随后，提出了姿势引导的6D转换以及无碰撞组装来构建具有任意初始姿势的任何设计结构。我们的新型3轴校准操作通过解开6D姿势估计和机器人组件进一步提高了精度和鲁棒性。定量和定性结果都证明了我们提出的6D机器人组装系统的有效性。

近年来，深入学习的蓬勃发展的开花目睹了文本认可的快速发展。但是，现有的文本识别方法主要用于英语文本，而忽略中文文本的关键作用。作为另一种广泛的语言，中文文本识别各种方式​​都有广泛的应用市场。根据我们的观察，我们将稀缺关注缺乏对缺乏合理的数据集建设标准，统一评估方法和现有基线的结果。为了填补这一差距，我们手动收集来自公开的竞争，项目和论文的中文文本数据集，然后将它们分为四类，包括场景，网络，文档和手写数据集。此外，我们在这些数据集中评估了一系列代表性的文本识别方法，具有统一的评估方法来提供实验结果。通过分析实验结果，我们令人惊讶地观察到识别英语文本的最先进的基线不能很好地表现出对中国情景的良好。由于中国文本的特征，我们认为仍然存在众多挑战，这与英文文本完全不同。代码和数据集在https://github.com/fudanvi/benchmarking-chinese-text-recognition中公开使用。

对抗性攻击，例如输入和对抗性样本的对抗扰动，对机器学习和深度学习技术构成重大挑战，包括互动推荐系统。这些技术的潜在嵌入空间使对抗性攻击难以在早期阶段检测。最近的因果关系表明，反事实也可以被认为是生成从不同分布所吸引的对抗样本作为训练样本的方法之一。我们建议探索基于强化学习的互动推荐系统的对抗性实例和攻击不可知论。我们首先通过将扰动添加到休闲因素的输入和干预来制造不同类型的对抗例。然后，我们通过基于制备数据检测基于深度学习的分类器的潜在攻击来增强推荐系统。最后，我们研究了对抗性示例的攻击强度和频率，并在具有多种制备方法的标准数据集中评估模型。我们广泛的实验表明，大多数逆势攻击都是有效的，攻击力量和攻击频率都会影响攻击性能。战略性定时攻击仅实现了比较攻击性能，只有1/3到1/2攻击频率。此外，我们的黑匣子探测器用一种制作方法培训，具有概述几种其他制备方法的泛化能力。

Dataset distillation has emerged as a prominent technique to improve data efficiency when training machine learning models. It encapsulates the knowledge from a large dataset into a smaller synthetic dataset. A model trained on this smaller distilled dataset can attain comparable performance to a model trained on the original training dataset. However, the existing dataset distillation techniques mainly aim at achieving the best trade-off between resource usage efficiency and model utility. The security risks stemming from them have not been explored. This study performs the first backdoor attack against the models trained on the data distilled by dataset distillation models in the image domain. Concretely, we inject triggers into the synthetic data during the distillation procedure rather than during the model training stage, where all previous attacks are performed. We propose two types of backdoor attacks, namely NAIVEATTACK and DOORPING. NAIVEATTACK simply adds triggers to the raw data at the initial distillation phase, while DOORPING iteratively updates the triggers during the entire distillation procedure. We conduct extensive evaluations on multiple datasets, architectures, and dataset distillation techniques. Empirical evaluation shows that NAIVEATTACK achieves decent attack success rate (ASR) scores in some cases, while DOORPING reaches higher ASR scores (close to 1.0) in all cases. Furthermore, we conduct a comprehensive ablation study to analyze the factors that may affect the attack performance. Finally, we evaluate multiple defense mechanisms against our backdoor attacks and show that our attacks can practically circumvent these defense mechanisms.

Blind image quality assessment (BIQA) remains challenging due to the diversity of distortion and image content variation, which complicate the distortion patterns crossing different scales and aggravate the difficulty of the regression problem for BIQA. However, existing BIQA methods often fail to consider multi-scale distortion patterns and image content, and little research has been done on learning strategies to make the regression model produce better performance. In this paper, we propose a simple yet effective Progressive Multi-Task Image Quality Assessment (PMT-IQA) model, which contains a multi-scale feature extraction module (MS) and a progressive multi-task learning module (PMT), to help the model learn complex distortion patterns and better optimize the regression issue to align with the law of human learning process from easy to hard. To verify the effectiveness of the proposed PMT-IQA model, we conduct experiments on four widely used public datasets, and the experimental results indicate that the performance of PMT-IQA is superior to the comparison approaches, and both MS and PMT modules improve the model's performance.

The development of social media user stance detection and bot detection methods rely heavily on large-scale and high-quality benchmarks. However, in addition to low annotation quality, existing benchmarks generally have incomplete user relationships, suppressing graph-based account detection research. To address these issues, we propose a Multi-Relational Graph-Based Twitter Account Detection Benchmark (MGTAB), the first standardized graph-based benchmark for account detection. To our knowledge, MGTAB was built based on the largest original data in the field, with over 1.55 million users and 130 million tweets. MGTAB contains 10,199 expert-annotated users and 7 types of relationships, ensuring high-quality annotation and diversified relations. In MGTAB, we extracted the 20 user property features with the greatest information gain and user tweet features as the user features. In addition, we performed a thorough evaluation of MGTAB and other public datasets. Our experiments found that graph-based approaches are generally more effective than feature-based approaches and perform better when introducing multiple relations. By analyzing experiment results, we identify effective approaches for account detection and provide potential future research directions in this field. Our benchmark and standardized evaluation procedures are freely available at: https://github.com/GraphDetec/MGTAB.

Given the increasingly intricate forms of partial differential equations (PDEs) in physics and related fields, computationally solving PDEs without analytic solutions inevitably suffers from the trade-off between accuracy and efficiency. Recent advances in neural operators, a kind of mesh-independent neural-network-based PDE solvers, have suggested the dawn of overcoming this challenge. In this emerging direction, Koopman neural operator (KNO) is a representative demonstration and outperforms other state-of-the-art alternatives in terms of accuracy and efficiency. Here we present KoopmanLab, a self-contained and user-friendly PyTorch module of the Koopman neural operator family for solving partial differential equations. Beyond the original version of KNO, we develop multiple new variants of KNO based on different neural network architectures to improve the general applicability of our module. These variants are validated by mesh-independent and long-term prediction experiments implemented on representative PDEs (e.g., the Navier-Stokes equation and the Bateman-Burgers equation) and ERA5 (i.e., one of the largest high-resolution data sets of global-scale climate fields). These demonstrations suggest the potential of KoopmanLab to be considered in diverse applications of partial differential equations.