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Register a new userMore is Better: Enhancing Open-Domain Dialogue Generation via Multi-Source Heterogeneous Knowledge
أكثر من الأفضل: تعزيز جيل الحوار مفتوح المجال عبر المعرفة متعددة المصدر غير المتجانسة
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على الرغم من تحقيق أداء ملحوظ، عادة ما تستخدم أعمال المعرفة المعززة بالمعرفة عادة قاعدة معرفة متجانسة واحدة متجانسة من تغطية المعرفة المحدودة. وبالتالي، فإنهم غالبا ما ينضون في الأساليب التقليدية لأنه لا يمكن ربط جميع الحوارات بإدخالات المعرفة. تقترح هذه الورقة نموذج جيل حوار جديد، مربع حوار MSKE، لحل هذه المشكلة بثلاث مزايا فريدة من نوعها: (1) بدلا من واحد فقط، يمكن حجز MSKE في وقت واحد على الاستفادة من مصادر المعرفة غير المتجانسة المتعددة (بما في ذلك ولكن لا يقتصر على معرفة المنطقية حقائق ومعرفة النص ومعرفة Infobox) لتحسين تغطية المعرفة؛ (2) لتجنب تعارض الموضوع بين السياق ومصادر المعرفة المختلفة، نقترح اختيار مرجعي متعدد التحديد لتحديد السياق / المعرفة بشكل أفضل؛ (3) نقترح جيل متعدد المراجع لتوليد ردود إعلامية من خلال الإشارة إلى مراجع توليد متعددة في نفس الوقت. تظهر التقييمات الواسعة على مجموعة بيانات صينية الأداء الفائق لهذا العمل ضد النهج المختلفة من أحدث الأحداث. لأفضل المعرفة لدينا، هذا العمل هو أول من يستخدم المعرفة غير المتجانسة متعددة المصدر في توليد الحوار المحسن في مجال المعرفة.
Despite achieving remarkable performance, previous knowledge-enhanced works usually only use a single-source homogeneous knowledge base of limited knowledge coverage. Thus, they often degenerate into traditional methods because not all dialogues can be linked with knowledge entries. This paper proposes a novel dialogue generation model, MSKE-Dialog, to solve this issue with three unique advantages: (1) Rather than only one, MSKE-Dialog can simultaneously leverage multiple heterogeneous knowledge sources (it includes but is not limited to commonsense knowledge facts, text knowledge, infobox knowledge) to improve the knowledge coverage; (2) To avoid the topic conflict among the context and different knowledge sources, we propose a Multi-Reference Selection to better select context/knowledge; (3) We propose a Multi-Reference Generation to generate informative responses by referring to multiple generation references at the same time. Extensive evaluations on a Chinese dataset show the superior performance of this work against various state-of-the-art approaches. To our best knowledge, this work is the first to use the multi-source heterogeneous knowledge in the open-domain knowledge-enhanced dialogue generation.
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Incorporating external knowledge sources effectively in conversations is a longstanding problem in open-domain dialogue research. The existing literature on open-domain knowledge selection is limited and makes certain brittle assumptions on knowledge
sources to simplify the overall task, such as the existence of a single relevant knowledge sentence per context. In this work, we evaluate the existing state of open-domain conversation knowledge selection, showing where the existing methodologies regarding data and evaluation are flawed. We then improve on them by proposing a new framework for collecting relevant knowledge, and create an augmented dataset based on the Wizard of Wikipedia (WOW) corpus, which we call WOW++. WOW++ averages 8 relevant knowledge sentences per dialogue context, embracing the inherent ambiguity of open-domain dialogue knowledge selection. We then benchmark various knowledge ranking algorithms on this augmented dataset with both intrinsic evaluation and extrinsic measures of response quality, showing that neural rerankers that use WOW++ can outperform rankers trained on standard datasets.
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