从大脑的事件驱动和稀疏的尖峰特征中受益,尖峰神经网络(SNN)已成为人工神经网络(ANN)的一种节能替代品。但是,SNNS和ANN之间的性能差距很长一段时间以来一直在延伸SNNS。为了利用SNN的全部潜力,我们研究了SNN中注意机制的影响。我们首先使用插件套件提出了我们的注意力,称为多维关注(MA)。然后,提出了一种新的注意力SNN体系结构,并提出了端到端训练,称为“ ma-snn”,该体系结构分别或同时或同时延伸了沿时间,通道以及空间维度的注意力重量。基于现有的神经科学理论,我们利用注意力重量来优化膜电位,进而以数据依赖性方式调节尖峰响应。 MA以可忽略的其他参数为代价,促进了香草SNN,以实现更稀疏的尖峰活动,更好的性能和能源效率。实验是在基于事件的DVS128手势/步态动作识别和Imagenet-1K图像分类中进行的。在手势/步态上,尖峰计数减少了84.9%/81.6%,任务准确性和能源效率提高了5.9%/4.7%和3.4 $ \ times $/3.2 $ \ times $。在ImagEnet-1K上,我们在单个/4步res-SNN-104上获得了75.92%和77.08%的TOP-1精度,这是SNN的最新结果。据我们所知,这是SNN社区与大规模数据集中的ANN相比,SNN社区取得了可比甚至更好的性能。我们的工作阐明了SNN作为支持SNN的各种应用程序的一般骨干的潜力,在有效性和效率之间取得了巨大平衡。
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零击学习(ZSL)旨在识别培训集中没有样本的类。一种代表性的解决方案是直接学习将视觉特征与相应的类语义相关联的嵌入函数,以识别新类。许多方法扩展了这种解决方案,最近的方法特别热衷于从图像中提取丰富的特征,例如属性功能。这些属性特征通常在每个单独的图像中提取;但是,不强调跨图像的特征的共同特征。在本文中,我们提出了一个新的框架来通过明确学习原型超出图像来提高ZSL,并用图像中的属性级特征对其进行对比优化它们。除了新颖的体系结构外,还针对属性表示强调了两个元素:新的原型生成模块旨在从属性语义生成属性原型;引入了基于硬示例的对比优化方案,以增强嵌入空间中的属性级特征。我们探索了两个基于CNN的替代骨干,基于CNN的骨干,以在三个标准基准测试(Cub,Sun,Awa2)上构建我们的框架并进行实验。这些基准测试的结果表明,我们的方法通过相当大的利润来改善艺术的状态。我们的代码将在https://github.com/dyabel/coar-zsl.git上找到
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尽管神经形态计算的快速进展,但尖刺神经网络(SNNS)的能力不足和不足的表现力严重限制了其在实践中的应用范围。剩余学习和捷径被证明是培训深层神经网络的重要方法,但以前的工作评估了他们对基于尖峰的通信和时空动力学的特征的适用性。在本文中,我们首先确定这种疏忽导致受阻信息流程和伴随以前的残留SNN中的降解问题。然后,我们提出了一种新型的SNN定向的残余块MS-Reset,能够显着地扩展直接训练的SNN的深度,例如,在ImageNet上最多可在CiFar-10和104层上完成482层,而不会观察到任何轻微的降级问题。我们验证了基于帧和神经形态数据集的MS-Reset的有效性,并且MS-Resnet104在直接训练的SNN的域中的第一次实现了在ImageNet上的76.02%精度的优越结果。还观察到巨大的能量效率,平均仅需要每根神经元的一穗来分类输入样本。我们相信我们强大且可扩展的型号将为进一步探索SNN提供强大的支持。
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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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Learning feature interactions is the key to success for the large-scale CTR prediction and recommendation. In practice, handcrafted feature engineering usually requires exhaustive searching. In order to reduce the high cost of human efforts in feature engineering, researchers propose several deep neural networks (DNN)-based approaches to learn the feature interactions in an end-to-end fashion. However, existing methods either do not learn both vector-wise interactions and bit-wise interactions simultaneously, or fail to combine them in a controllable manner. In this paper, we propose a new model, xDeepInt, based on a novel network architecture called polynomial interaction network (PIN) which learns higher-order vector-wise interactions recursively. By integrating subspace-crossing mechanism, we enable xDeepInt to balance the mixture of vector-wise and bit-wise feature interactions at a bounded order. Based on the network architecture, we customize a combined optimization strategy to conduct feature selection and interaction selection. We implement the proposed model and evaluate the model performance on three real-world datasets. Our experiment results demonstrate the efficacy and effectiveness of xDeepInt over state-of-the-art models. We open-source the TensorFlow implementation of xDeepInt: https://github.com/yanyachen/xDeepInt.
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