deka-qwen3-emb-0.6b-infonce-lay
Full fine-tune of Qwen/Qwen3-Embedding-0.6B for Thai Supreme Court (deka) case retrieval.
- objective:
infonce - document register:
lay(query side trained againstfacttext) - best epoch: 2 (early-stopped on dev R@10 = 20.25)
- pooling: last token (left padding) + L2 normalize
- lr 2e-05, batch 16, tau 0.05, max_len doc 1300 / query 256, seed 42
Test results (full corpus, clean qrels)
| eval register | R@5 | R@10 | R@50 | R@100 | ndcg@10 | mrr |
|---|---|---|---|---|---|---|
| user | 11.9 | 19.52 | 39.05 | 52.86 | 11.83 | 0.1379 |
| lawer | 14.76 | 26.19 | 53.81 | 63.81 | 16.05 | 0.1864 |
| fact | 22.86 | 31.9 | 61.43 | 73.33 | 21.09 | 0.2827 |
Usage
Queries must carry the instruction prefix used in training; documents must not.
from sentence_transformers import SentenceTransformer
m = SentenceTransformer("anonymousresearch123/deka-qwen3-emb-0.6b-infonce-lay")
q = m.encode(["ลูกจ้างถูกเลิกจ้างโดยไม่บอกกล่าวล่วงหน้า"], prompt_name="query")
d = m.encode(["<คำพิพากษาฎีกา ...>"])
print(m.similarity(q, d))
Plain transformers:
import torch, torch.nn.functional as F
from transformers import AutoModel, AutoTokenizer
tok = AutoTokenizer.from_pretrained("anonymousresearch123/deka-qwen3-emb-0.6b-infonce-lay", padding_side="left")
net = AutoModel.from_pretrained("anonymousresearch123/deka-qwen3-emb-0.6b-infonce-lay", torch_dtype=torch.bfloat16).eval()
INSTRUCT = "Given a legal case search query, retrieve relevant prior Supreme Court cases"
texts = [f"Instruct: {INSTRUCT}\nQuery: ลูกจ้างถูกเลิกจ้าง..."] # query side only
enc = tok(texts, padding=True, truncation=True, max_length=1300, return_tensors="pt")
with torch.no_grad():
h = net(**enc).last_hidden_state
emb = F.normalize(h[:, -1].float(), p=2, dim=-1)
Left padding is required — pooling takes the last position.
Training data
anonymousresearch123/deka-retrieval — splits train / eval / test.
training_history.json in this repo holds the full per-epoch log and config.