Papers by Mitchell Stern
Imitation Attacks and Defenses for Black-box Machine Translation Systems (2020.emnlp-main)
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| Challenge: | Using simulated experiments, we demonstrate that MT systems can be stolen even when imitation models have different input data or architectures than their target models. |
| Approach: | They propose a defense that modifies translation outputs to misdirect optimization of imitation models. |
| Outcome: | The proposed defense degrades the adversary’s BLEU score and attack success rate at some cost in the defender’s performance and inference speed. |
An Empirical Study of Generation Order for Machine Translation (2020.emnlp-main)
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| Challenge: | a recent study of generation order for machine translation shows it does not affect output quality . Neural sequence models have been successfully applied to a broad range of tasks in recent years . |
| Approach: | They propose a soft order-reward framework that enables models to follow arbitrary oracle generation policies. |
| Outcome: | The proposed framework explores a wide variety of generation orders including uninformed orders, location-based orders, frequency-based or model-based orderings, and model-driven orders. |
Semantic Scaffolds for Pseudocode-to-Code Generation (2020.acl-main)
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| Challenge: | Existing methods for program generation use lightweight structures to represent high-level semantics and syntactic composition of a program. |
| Approach: | They propose a method for program generation based on semantic scaffolds . they use line-level natural language pseudocode annotations to search for programs . |
| Outcome: | The proposed method achieves 10% improvement in top-100 accuracy over the current state-of-the-art method. |
What’s Going On in Neural Constituency Parsers? An Analysis (N18-1)
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| Challenge: | a number of differences have emerged between classical and modern constituency parsing approaches . structural components like grammars and feature-rich lexicons are becoming less central . recurrent neural networks have gained traction as a powerful and general purpose tool for representation . |
| Approach: | They propose a model that implicitly learns to encode much of the same information as grammars and lexicons in the past. |
| Outcome: | The proposed model outperforms state-of-the-art models under similar conditions. |