Knowledge distillation of multi-level feature fusion and dual-teacher collaboration
Bibliographic record
Abstract
目的知识蒸馏旨在不影响原始模型性能的前提下，将一个性能强大且参数量也较大的教师模型的知识迁移到一个轻量级的学生模型上。在图像分类领域，以往的蒸馏方法大多聚焦于全局信息的提取而忽略了局部信息的重要性。并且这些方法多是围绕单教师架构蒸馏，忽视了学生可以同时向多名教师学习的潜力。因此，提出了一种融合全局和局部特征的双教师协作知识蒸馏框架。方法首先随机初始化一个教师（临时教师）与学生处理全局信息进行同步训练，利用其临时的全局输出逐步帮助学生以最优路径接近教师的最终预测。同时又引入了一个预训练的教师（专家教师）处理局部信息。专家教师将局部特征输出分离为源类别知识和其他类别知识并分别转移给学生以提供较为全面的监督信息。结果在CIFAR-100（Canadian Institute for Advanced Research）和Tiny-ImageNet数据集上进行实验并与其他蒸馏方法进行了比较。在CIFAR-100数据集中，与最近的NKD（normalized knowledge distillation）相比，在师生相同架构与不同架构下，平均分类准确率分别提高了0.63%和1.00%。在Tiny-ImageNet数据集中，ResNet34（residual network）和MobileNetV1的师生组合下，分类准确率相较于SRRL（knowledge distillation via softmax regression representation learning）提高了1.09%，相较于NKD提高了1.06%。同时也在CIFAR-100数据集中进行了消融实验和可视化分析以验证所提方法的有效性。结论本文所提出的双教师协作知识蒸馏框架，融合了全局和局部特征，并将模型的输出响应分离为源类别知识和其他类别知识并分别转移给学生，使得学生模型的图像分类结果具有更高的准确率。
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.010 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.004 |
| Scholarly communication | 0.005 | 0.012 |
| Open science | 0.001 | 0.004 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.010 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".