Multi-Teacher knowledge distillation provides students with additional
supervision from multiple pre-trained teachers with diverse information
sources. Most existing methods explore different weighting strategies to obtain
a powerful ensemble teacher, while ignoring the student with poor learning
ability may not benefit from such specialized integrated knowledge. To address
this problem, we propose Adaptive Multi-teacher Knowledge Distillation with
Meta-Learning (MMKD) to supervise student with appropriate knowledge from a
tailored ensemble teacher. With the help of a meta-weight network, the diverse
yet compatible teacher knowledge in the output layer and intermediate layers is
jointly leveraged to enhance the student performance. Extensive experiments on
multiple benchmark datasets validate the effectiveness and flexibility of our
methods. Code is available: this https URL

本文提出了自适应多教师知识蒸馏与元学习，以指导学生从量身定制的集成教师中获得适当的知识。通过元权重网络的辅助，将输出层和中间层中多样但兼容的教师知识联合利用，以增强学生的表现。在多个基准数据集上进行的广泛实验验证了本方法的有效性和灵活性。

元学习的自适应多教师知识蒸馏

Adaptive Multi-Teacher Knowledge Distillation with Meta-Learning

Traditional knowledge distillation uses a two-stage training strategy to
transfer knowledge from a high-capacity teacher model to a compact student
model, which relies heavily on the pre-trained teacher. Recent online knowledge
distillation alleviates this limitation by collaborative learning, mutual
learning and online ensembling, following a one-stage end-to-end training
fashion. However, collaborative learning and mutual learning fail to construct
an online high-capacity teacher, whilst online ensembling ignores the
collaboration among branches and its logit summation impedes the further
optimisation of the ensemble teacher. In this work, we propose a novel Peer
Collaborative Learning method for online knowledge distillation, which
integrates online ensembling and network collaboration into a unified
framework. Specifically, given a target network, we construct a multi-branch
network for training, in which each branch is called a peer. We perform random
augmentation multiple times on the inputs to peers and assemble feature
representations outputted from peers with an additional classifier as the peer
ensemble teacher. This helps to transfer knowledge from a high-capacity teacher
to peers, and in turn further optimises the ensemble teacher. Meanwhile, we
employ the temporal mean model of each peer as the peer mean teacher to
collaboratively transfer knowledge among peers, which helps each peer to learn
richer knowledge and facilitates to optimise a more stable model with better
generalisation. Extensive experiments on CIFAR-10, CIFAR-100 and ImageNet show
that the proposed method significantly improves the generalisation of various
backbone networks and outperforms the state-of-the-art methods.

该论文提出了一种名为 “Peer Collaborative Learning” 的在线知识蒸馏方法，该方法能够将在线集成和网络协作融入一个统一的框架中，并在 CIFAR-10，CIFAR-100 和 ImageNet 等数据集上得到了验证及优于其他方法的效果。