---
license: apache-2.0
library_name: sentence-transformers
pipeline_tag: sentence-similarity
tags:
- sentence-transformers
- feature-extraction
- semantic-search
- automotive-parts
- synonyms
base_model: sentence-transformers/all-MiniLM-L6-v2
---

# Automotive Parts Synonym Model

A fine-tuned SentenceTransformer model specialized for finding synonyms and related terms in automotive parts and service descriptions.

## Model Description

This model is fine-tuned from `sentence-transformers/all-MiniLM-L6-v2` specifically for automotive parts synonym detection. It can identify when different part names refer to the same or similar components.

**Base Model:** `sentence-transformers/all-MiniLM-L6-v2`  

## Training Details

**Training Strategy:** 3-phase approach
1. **Contextual Training** (30 epochs): Full phrases with synonyms/antonyms
2. **Foundation Training** (15 epochs): Word-to-word synonyms/antonyms  
3. **Real-world Fine-tuning** (4 epochs): Search phrases and repair descriptions

**Loss Function:** OnlineContrastiveLoss with varying margins (0.6 → 0.4 → 0.4)  
**Training Data:** Automotive parts synonym/antonym pairs with contextual repair descriptions  

## Performance

Evaluated on 15-state synonyms phrases, deepseek general queries, STS-B and MTB datasets:
- **Top-200 Synonym Recall** 15251/15330 (99.5%)
- **MRR@200** 0.6454
- **Top-200 Deepseek Recall** 140633/142325 (98.8%)
- **MRR@200** 0.4401
- **STS-B Spearman:** 0.867
- **MTB Spearman:** 0.724

## Limitations
- Optimized specifically for automotive parts and repair terminology
- May not perform well on general-domain text