
details explanation and background
We solve this using a Teacher–Student knowledge distillation framework:
We train a Teacher model on a clean and complete dataset where both inputs and labels are available.
We then use that Teacher to teach two separate Student models:
Student A learns from incomplete input (some sensor values missing).
Student B learns from incomplete labels (RUL labels missing for some samples).
We use knowledge distillation to guide both students, even when labels are missing.
Why We Use Two Students
Student A handles Missing Input Features: It receives input with some features masked out. Since it cannot see the full input, we help it by transferring internal features (feature distillation) and predictions from the teacher.
Student B handles Missing RUL Labels: It receives full input but does not always have a ground-truth RUL label. We guide it using the predictions of the teacher model (prediction distillation).
Using two students allows each to specialize in solving one problem with a tailored learning strategy.
Detailed Explanation of the Teaching Process
1. Teacher Model (Trained First)
Input: Complete features
Label: Known RUL values
Output:
Final prediction ŷ_T (predicted RUL)
Internal features f_T (last encoder layer output)
2. Student A (Handles Missing Input)
Input: Some sensor values are masked
Label: RUL label available for some samples
Output: Predicted RUL: ŷ_S^A
How the Teacher Teaches Student A:
The student sees masked inputs. It tries to reconstruct what the teacher would have done if it had the full input.
We calculate:
Prediction distillation loss: How close is ŷ_S^A to ŷ_T?
Feature distillation loss: How close are the student’s encoder features to the teacher’s? f_S^A vs. f_T
Supervised loss: Where RUL label is available, compare to ground truth.
All these losses are combined, and we update the student encoder through backpropagation.
3. Student B (Handles Missing Labels)
Input: Full sensor data
Label: RUL label available only for some samples
Output: Predicted RUL: ŷ_S^B
How the Teacher Teaches Student B:
The student sees the full input, but no ground-truth RUL label.
We compute:
Prediction distillation loss: ŷ_S^B vs. ŷ_T
Supervised loss (only when RUL is available)
No feature distillation is used here — only predictions are used to guide learning.
Clarify Knowledge Distillation Process
Explain step-by-step how the teacher transfers knowledge to the student during training.
Use Two Distinct Strategies with Two Architectures
The student model handles two separate challenges
make a new diagram to illustrate the full work make sure sure to clarify explicitly the knowledge distillation part


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