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---
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language:
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- de
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- en
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- es
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- fr
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- it
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- ja
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- nl
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- pt
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- zh
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---
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# Model Card for `passage-ranker.mango`
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This model is a passage ranker developed by Sinequa. It produces a relevance score given a query-passage pair and is used to order search results.
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Model name: `passage-ranker.mango`
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## Supported Languages
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The model was trained and tested in the following languages:
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- Chinese (simplified)
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- Dutch
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- English
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- French
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- German
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- Italian
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- Japanese
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- Portuguese
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- Spanish
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Besides the aforementioned languages, basic support can be expected for additional 93 languages that were used during the pretraining of the base model (see
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[list of languages](https://github.com/google-research/bert/blob/master/multilingual.md#list-of-languages)).
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## Scores
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| Metric | Value |
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|:--------------------|------:|
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| Relevance (NDCG@10) | 0.480 |
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Note that the relevance score is computed as an average over 14 retrieval datasets (see
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[details below](#evaluation-metrics)).
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## Inference Times
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| GPU | Quantization type | Batch size 1 | Batch size 32 |
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|:------------------------------------------|:------------------|---------------:|---------------:|
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| NVIDIA A10 | FP16 | 2 ms | 28 ms |
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| NVIDIA A10 | FP32 | 4 ms | 82 ms |
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| NVIDIA T4 | FP16 | 3 ms | 65 ms |
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| NVIDIA T4 | FP32 | 14 ms | 369 ms |
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| NVIDIA L4 | FP16 | 3 ms | 38 ms |
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| NVIDIA L4 | FP32 | 5 ms | 123 ms |
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## Gpu Memory usage
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| Quantization type | Memory |
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|:-------------------------------------------------|-----------:|
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| FP16 | 850 MiB |
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| FP32 | 1200 MiB |
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Note that GPU memory usage only includes how much GPU memory the actual model consumes on an NVIDIA T4 GPU with a batch
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size of 32. It does not include the fix amount of memory that is consumed by the ONNX Runtime upon initialization which
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can be around 0.5 to 1 GiB depending on the used GPU.
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## Requirements
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- Minimal Sinequa version: 11.10.0
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- Minimal Sinequa version for using FP16 models and GPUs with CUDA compute capability of 8.9+ (like NVIDIA L4): 11.11.0
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- [Cuda compute capability](https://developer.nvidia.com/cuda-gpus): above 5.0 (above 6.0 for FP16 use)
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## Model Details
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### Overview
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- Number of parameters: 167 million
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- Base language model: [Multilingual BERT-Base](https://huggingface.co/bert-base-multilingual-uncased)
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- Insensitive to casing and accents
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- Training procedure: [MonoBERT](https://arxiv.org/abs/1901.04085)
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### Training Data
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- MS MARCO Passage Ranking
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([Paper](https://arxiv.org/abs/1611.09268),
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[Official Page](https://microsoft.github.io/msmarco/),
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[English & translated datasets on the HF dataset hub](https://huggingface.co/datasets/unicamp-dl/mmarco))
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- Original English dataset
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- Translated datasets for the other eight supported languages
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### Evaluation Metrics
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To determine the relevance score, we averaged the results that we obtained when evaluating on the datasets of the
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[BEIR benchmark](https://github.com/beir-cellar/beir). Note that all these datasets are in English.
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| Dataset | NDCG@10 |
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|:------------------|--------:|
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| Average | 0.480 |
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| Arguana | 0.537 |
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| CLIMATE-FEVER | 0.241 |
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| DBPedia Entity | 0.371 |
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| FEVER | 0.777 |
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| FiQA-2018 | 0.327 |
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| HotpotQA | 0.696 |
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| MS MARCO | 0.414 |
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| NFCorpus | 0.332 |
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| NQ | 0.484 |
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| Quora | 0.768 |
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| SCIDOCS | 0.143 |
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| SciFact | 0.648 |
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| TREC-COVID | 0.673 |
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| Webis-Touche-2020 | 0.310 |
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We evaluated the model on the datasets of the [MIRACL benchmark](https://github.com/project-miracl/miracl) to test its multilingual capacities. Note that not all training languages are part of the benchmark, so we only report the metrics for the existing languages.
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| Language | NDCG@10 |
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|:----------------------|--------:|
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| Chinese (simplified) | 0.463 |
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| French | 0.447 |
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| German | 0.415 |
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| Japanese | 0.526 |
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| Spanish | 0.485 |
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