DENL: Diverse Ensemble and Noisy Logits for Improved Robustness of Neural Networks
Bibliographic record
Abstract
Neural networks (NN) are increasingly used for image classification in medical, transportation, and security devices. However, recent studies have revealed neural networks' vulnerability against adversarial examples generated by adding small perturbations to images. These malicious samples are imperceptible by human eyes, but can lead to misclassification by neural networks. Defensive distillation is a defence mechanism in which the NN's output probabilities are scaled to a user-defined range and used as labels to train a new model less sensitive to input perturbations. Despite initial success, defensive distillation was defeated by state-of-the-art attacks. A proposed countermeasure was to add noise in the inference time to hamper the adversarial attack, which decreased the accuracy of the models. To address this limitation, we propose a two-phase training methodology to defend against adversarial attacks. In the first phase, we train architecturally diversified models individually using the cross-entropy loss function. In the second phase, we train the ensemble using a diversity-promoting loss function. Our experimental results show that our training methodology and noise addition in the inference time improved our ensemble's resistance against adversarial attacks, while maintaining reasonable accuracy, compared to the state-of-the-art methods.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.009 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.002 | 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".