International Classification of Diseases (ICD) is a set of classification codes for medical records. Automated ICD coding, which assigns unique International Classification of Diseases codes with each medical record, is widely used recently for its efficiency and error-prone avoidance. However, there are challenges that remain such as heterogeneity, label unbalance, and complex relationships between ICD codes. In this work, we proposed a novel Bidirectional Hierarchy Framework(HieNet) to address the challenges. Specifically, a personalized PageRank routine is developed to capture the co-relation of codes, a bidirectional hierarchy passage encoder to capture the codes' hierarchical representations, and a progressive predicting method is then proposed to narrow down the semantic searching space of prediction. We validate our method on two widely used datasets. Experimental results on two authoritative public datasets demonstrate that our proposed method boosts state-of-the-art performance by a large margin.
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喷气标记是粒子物理学中的一项关键但具有挑战性的分类任务。尽管深度学习已经改变了喷气标记并显着提高了性能,但缺乏大规模的公共数据集阻碍了进一步的增强。在这项工作中,我们提出了JetClass,这是一种用于喷气标记的新综合数据集。 JETCLASS数据集由100 M喷气机组成,比现有公共数据集大约两个数量级。总共模拟了10种类型的喷气机,包括到目前为止未探索用于标记的几种类型。基于大型数据集,我们提出了一种用于喷射标记的新的基于变压器的体系结构,称为“粒子变压器”(部分)。通过将成对的粒子相互作用纳入注意机制,部分可以达到比普通变压器更高的标记性能,并超过了先前最新的颗粒,颗粒的幅度很大。一旦进行了微调,预先训练的零件模型也大大提高了两个广泛采用的喷气标记基准的性能。数据集,代码和模型可在https://github.com/jet-universe/particle_transformer上公开获得。
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自动驾驶在过去二十年中吸引了重要的研究兴趣,因为它提供了许多潜在的好处,包括释放驾驶和减轻交通拥堵的司机等。尽管进展有前途,但车道变化仍然是自治车辆(AV)的巨大挑战,特别是在混合和动态的交通方案中。最近,强化学习(RL)是一种强大的数据驱动控制方法,已被广泛探索了在令人鼓舞的效果中的通道中的车道改变决策。然而,这些研究的大多数研究专注于单车展,并且在多个AVS与人类驱动车辆(HDV)共存的情况下,道路变化已经受到稀缺的关注。在本文中,我们在混合交通公路环境中制定了多个AVS的车道改变决策,作为多功能增强学习(Marl)问题,其中每个AV基于相邻AV的动作使车道变化的决定和HDV。具体地,使用新颖的本地奖励设计和参数共享方案开发了一种多代理优势演员批评网络(MA2C)。特别是,提出了一种多目标奖励功能来纳入燃油效率,驾驶舒适度和自主驾驶的安全性。综合实验结果,在三种不同的交通密度和各级人类司机侵略性下进行,表明我们所提出的Marl框架在效率,安全和驾驶员舒适方面始终如一地优于几个最先进的基准。
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对抗训练方法是针对对抗性例子的最先进(SOTA)经验防御方法。事实证明,许多正则化方法与对抗训练的组合有效。然而,这种正则化方法是在时域中实现的。由于对抗性脆弱性可以被视为一种高频现象,因此必须调节频域中的对抗训练的神经网络模型。面对这些挑战,我们对小波的正则化属性进行了理论分析,可以增强对抗性训练。我们提出了一种基于HAAR小波分解的小波正则化方法,该方法称为小波平均池。该小波正则化模块集成到宽的残留神经网络中,因此形成了新的WideWavelEtResnet模型。在CIFAR-10和CIFAR-100的数据集上,我们提出的对抗小波训练方法在不同类型的攻击下实现了相当大的鲁棒性。它验证了以下假设:我们的小波正则化方法可以增强对抗性的鲁棒性,尤其是在深宽的神经网络中。实施了频率原理(F原理)和解释性的可视化实验,以显示我们方法的有效性。提出了基于不同小波碱函数的详细比较。该代码可在存储库中获得:\ url {https://github.com/momo1986/AdversarialWavelTraining}。
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In this paper, we propose a robust 3D detector, named Cross Modal Transformer (CMT), for end-to-end 3D multi-modal detection. Without explicit view transformation, CMT takes the image and point clouds tokens as inputs and directly outputs accurate 3D bounding boxes. The spatial alignment of multi-modal tokens is performed implicitly, by encoding the 3D points into multi-modal features. The core design of CMT is quite simple while its performance is impressive. CMT obtains 73.0% NDS on nuScenes benchmark. Moreover, CMT has a strong robustness even if the LiDAR is missing. Code will be released at https://github.com/junjie18/CMT.
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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.
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Automatic music generation with artificial intelligence typically requires a large amount of data which is hard to obtain for many less common genres and musical instruments. To tackle this issue, we present ongoing work and preliminary findings on the possibility for deep models to transfer knowledge from language to music, by finetuning large language models pre-trained on a massive text corpus on only hundreds of MIDI files of drum performances. We show that by doing so, one of the largest, state-of-the-art models (GPT3) is capable of generating reasonable drum grooves, while models that are not pre-trained (Transformer) shows no such ability beyond naive repetition. Evaluating generated music is a challenging task, more so is evaluating drum grooves with little precedence in literature. Hence, we propose a tailored structural evaluation method and analyze drum grooves produced by GPT3 compared to those played by human professionals, exposing the strengths and weaknesses of such generation by language-to-music transfer. Our findings suggest that language-to-music transfer learning with large language models is viable and promising.
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Few Shot Instance Segmentation (FSIS) requires models to detect and segment novel classes with limited several support examples. In this work, we explore a simple yet unified solution for FSIS as well as its incremental variants, and introduce a new framework named Reference Twice (RefT) to fully explore the relationship between support/query features based on a Transformer-like framework. Our key insights are two folds: Firstly, with the aid of support masks, we can generate dynamic class centers more appropriately to re-weight query features. Secondly, we find that support object queries have already encoded key factors after base training. In this way, the query features can be enhanced twice from two aspects, i.e., feature-level and instance-level. In particular, we firstly design a mask-based dynamic weighting module to enhance support features and then propose to link object queries for better calibration via cross-attention. After the above steps, the novel classes can be improved significantly over our strong baseline. Additionally, our new framework can be easily extended to incremental FSIS with minor modification. When benchmarking results on the COCO dataset for FSIS, gFSIS, and iFSIS settings, our method achieves a competitive performance compared to existing approaches across different shots, e.g., we boost nAP by noticeable +8.2/+9.4 over the current state-of-the-art FSIS method for 10/30-shot. We further demonstrate the superiority of our approach on Few Shot Object Detection. Code and model will be available.
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Graph Neural Networks (GNNs) have shown satisfying performance on various graph learning tasks. To achieve better fitting capability, most GNNs are with a large number of parameters, which makes these GNNs computationally expensive. Therefore, it is difficult to deploy them onto edge devices with scarce computational resources, e.g., mobile phones and wearable smart devices. Knowledge Distillation (KD) is a common solution to compress GNNs, where a light-weighted model (i.e., the student model) is encouraged to mimic the behavior of a computationally expensive GNN (i.e., the teacher GNN model). Nevertheless, most existing GNN-based KD methods lack fairness consideration. As a consequence, the student model usually inherits and even exaggerates the bias from the teacher GNN. To handle such a problem, we take initial steps towards fair knowledge distillation for GNNs. Specifically, we first formulate a novel problem of fair knowledge distillation for GNN-based teacher-student frameworks. Then we propose a principled framework named RELIANT to mitigate the bias exhibited by the student model. Notably, the design of RELIANT is decoupled from any specific teacher and student model structures, and thus can be easily adapted to various GNN-based KD frameworks. We perform extensive experiments on multiple real-world datasets, which corroborates that RELIANT achieves less biased GNN knowledge distillation while maintaining high prediction utility.
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This paper focuses on designing efficient models with low parameters and FLOPs for dense predictions. Even though CNN-based lightweight methods have achieved stunning results after years of research, trading-off model accuracy and constrained resources still need further improvements. This work rethinks the essential unity of efficient Inverted Residual Block in MobileNetv2 and effective Transformer in ViT, inductively abstracting a general concept of Meta-Mobile Block, and we argue that the specific instantiation is very important to model performance though sharing the same framework. Motivated by this phenomenon, we deduce a simple yet efficient modern \textbf{I}nverted \textbf{R}esidual \textbf{M}obile \textbf{B}lock (iRMB) for mobile applications, which absorbs CNN-like efficiency to model short-distance dependency and Transformer-like dynamic modeling capability to learn long-distance interactions. Furthermore, we design a ResNet-like 4-phase \textbf{E}fficient \textbf{MO}del (EMO) based only on a series of iRMBs for dense applications. Massive experiments on ImageNet-1K, COCO2017, and ADE20K benchmarks demonstrate the superiority of our EMO over state-of-the-art methods, \eg, our EMO-1M/2M/5M achieve 71.5, 75.1, and 78.4 Top-1 that surpass \textbf{SoTA} CNN-/Transformer-based models, while trading-off the model accuracy and efficiency well.
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