开发会话剂与患者相互作用并提供主要的临床建议,由于其巨大的应用潜力引起了人们的关注,尤其是在COVID-19-19大流行时期。但是,端到端神经对话系统的培训受到数量不足的医学对话语料库的限制。在这项工作中,我们首次尝试建立和发布与12种常见的胃肠道疾病相关的大规模高质量医学对话数据集,名为MEDDG,并从在线健康咨询社区收集了超过17K的对话。在MEDDG的每次对话中,都会注释五种不同类别的实体,包括疾病,症状,属性,测试和药物。为了推动对建立专家敏感的医学对话系统的未来研究,我们提出了基于MEDDG数据集的两种医疗对话任务。一个是下一个实体预测,另一个是医生的反应生成。为了明确理解这两项医学对话任务,我们实施了几个最先进的基准,并设计了两个对话模型,并进一步考虑了预测的实体。实验结果表明,训练前语言模型和其他基线在我们数据集中的性能差的两项任务上都挣扎,并且可以在辅助实体信息的帮助下增强响应质量。从人类评估来看,简单的检索模型的表现优于几个最新的生成模型,这表明仍然有一个很大的改进空间可以改善产生有意义的反应。
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医学对话生成是一项重要但具有挑战性的任务。以前的大多数作品都依赖于注意力机制和大规模预处理的语言模型。但是,这些方法通常无法从长时间的对话历史中获取关键信息,从而产生准确和信息丰富的响应,因为医疗实体通常散布在多种话语中以及它们之间的复杂关系。为了减轻此问题,我们提出了一个具有关键信息召回(Medpir)的医疗响应生成模型,该模型建立在两个组件上,即知识吸引的对话图形编码器和召回增强的生成器。知识吸引的对话图编码器通过利用话语中的实体之间的知识关系,并使用图形注意力网络对话图来构建对话图。然后,召回增强的发电机通过在产生实际响应之前生成对话的摘要来增强这些关键信息的使用。两个大型医学对话数据集的实验结果表明,Medpir在BLEU分数和医疗实体F1度量中的表现优于强大的基准。
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In recent years, interest has arisen in using machine learning to improve the efficiency of automatic medical consultation and enhance patient experience. In this article, we propose two frameworks to support automatic medical consultation, namely doctor-patient dialogue understanding and task-oriented interaction. We create a new large medical dialogue dataset with multi-level finegrained annotations and establish five independent tasks, including named entity recognition, dialogue act classification, symptom label inference, medical report generation and diagnosis-oriented dialogue policy. We report a set of benchmark results for each task, which shows the usability of the dataset and sets a baseline for future studies. Both code and data is available from https://github.com/lemuria-wchen/imcs21.
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医疗对话系统(MDSS)旨在协助医生和患者一系列专业医疗服务,即诊断,咨询和治疗。但是,一站式MDS仍然是未开发的,因为:(1)没有数据集如此大规模对话包含多种医疗服务和细粒度的医疗标签(即,意图,插槽,值); (2)没有模型已经根据统一框架中的多服务对话解决了MDS。在这项工作中,我们首先建立一个多域多次服务医学对话(M ^ 2-Meddialog)数据集,其中包含医生和患者的1,557种对话,涵盖276种疾病,2,468种医学实体和3种医疗服务专业。据我们所知,它是唯一包括多种医疗服务和细粒度医疗标签的医疗对话数据集。然后,我们将一站式MDS制定为序列到序列生成问题。我们分别统一MDS,具有因果语言建模和条件因果语言建模。具体而言,我们采用了几种预磨料模型(即,Bert-WWM,BERT-MED,GPT2和MT5)及其变体,以在M ^ 2-MedDialog数据集上获取基准。我们还提出了伪标签和自然扰动方法来扩展M2-MedDialog数据集,并增强最先进的预磨损模型。我们展示了到目前为止通过对M2-MEDDIALOG的大量实验来实现的结果。我们释放DataSet,代码以及评估脚本,以促进在这方面的未来研究。
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药物建议是智能医疗系统的关键任务。先前的研究主要建议使用电子健康记录(EHRS)药物。但是,在EHR中可能会忽略或忽略医生与患者之间的相互作用的一些细节,这对于自动药物建议至关重要。因此,我们首次尝试通过医生和患者之间的对话推荐药物。在这项工作中,我们构建了Dialmed,这是第一个用于基于医学对话的药物建议任务的高质量数据集。它包含与3个部门的16种常见疾病和70种相应常见药物有关的11,996次医疗对话。此外,我们提出了对话结构和疾病知识意识网络(DDN),其中QA对话图机制旨在模拟对话结构,并使用知识图来引入外部疾病知识。广泛的实验结果表明,所提出的方法是推荐与医疗对话的药物的有前途的解决方案。该数据集和代码可在https://github.com/f-window/dialmed上找到。
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以任务为导向的对话系统(TDSS)主要在离线设置或人类评估中评估。评估通常仅限于单转或非常耗时。作为替代方案,模拟用户行为的用户模拟器使我们能够考虑一组广泛的用户目标,以生成类似人类的对话以进行模拟评估。使用现有的用户模拟器来评估TDSS是具有挑战性的,因为用户模拟器主要旨在优化TDSS的对话策略,并且评估功能有限。此外,对用户模拟器的评估是一个开放的挑战。在这项工作中,我们提出了一个用于端到端TDS评估的隐喻用户模拟器,如果它在与系统的交互中模拟用户的类似思维,则定义模拟器是隐喻的。我们还提出了一个基于测试人员的评估框架,以生成变体,即具有不同功能的对话系统。我们的用户模拟器构建了一个隐喻的用户模型,该模型通过参考遇到新项目时的先验知识来帮助模拟器进行推理。我们通过检查模拟器与变体之间的模拟相互作用来估计模拟器的质量。我们的实验是使用三个TDS数据集进行的。与基于议程的模拟器和三个数据集上的SEQ2SEQ模型相比,隐喻用户模拟器与手动评估的一致性更好。我们的测试人员框架展示了效率,并且可以更好地概括和可扩展性,因为它可以适用于多个域中的对话和多个任务,例如对话建议和电子商务对话。
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最近,通过“向导”模拟游戏收集了一类以任务为导向的对话(TOD)数据集。但是,《巫师》数据实际上是模拟的数据,因此与现实生活中的对话根本不同,这些对话更加嘈杂和随意。最近,Seretod挑战赛是组织的,并发布了Mobilecs数据集,该数据集由来自中国移动的真实用户和客户服务人员之间的真实世界对话框组成。基于Mobilecs数据集,Seretod挑战具有两个任务,不仅评估了对话系统本身的构建,而且还检查了对话框成绩单中的信息提取,这对于建立TOD的知识库至关重要。本文主要介绍了Mobilecs数据集对这两项任务的基线研究。我们介绍了如何构建两个基线,遇到的问题以及结果。我们预计基线可以促进令人兴奋的未来研究,以建立针对现实生活任务的人类机器人对话系统。
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这项工作结合了有关预先训练模型编码的对话历史的信息,其含义表示当前系统话语,以实现面向任务对话中的语境语言生成。我们利用预先训练的多上下文转换模型进行从头开始培训的模型中的上下文表示;并利用从预训练的GPT-2调整的模型中的上下文生成的立即使用前面的用户话语。与多种数据集的两个实验表明,通过预先训练的模型编码的上下文信息可提高自动指标和人类评估中的响应生成的性能。我们所呈现的上下文发电机使得更高种类的响应能够更好地适应正在进行的对话。分析上下文大小显示,较长的上下文不会自动导致更好的性能,但是前面的用户话语的直接对上下文生成起着重要作用。此外,我们还提出了一种基于GPT的生成模型的重新排名。实验表明,RE-Ranker选择的响应对自动度量有重大改进。
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Crosstalk是一种传统的中国戏剧表演艺术。它通常由两个表演者以对话的形式执行。凭借对话的典型特征,串扰也被设计为有趣的观众。在这项研究中,我们介绍了Crossdial,这是第一个开源数据集,其中包含来自网络上最经典的中国串扰。此外,我们定义了两个新任务,提供了两个基准,并研究了当前的对话生成模型在串扰生成领域的能力。实验结果和案例研究表明,串扰的生成对于直接方法来说是具有挑战性的,并且仍然是未来工作的有趣主题。
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We have a Christmas gift for Harry Potter fans all over the world. In this paper, we present Harry Potter Dialogue (HPD), a dataset that helps train Harry Potter-like dialogue agents. Such a task is typically viewed as a variant of personalized dialogue agents, but they differ significantly in three respects: 1) Harry lived in a virtual world of wizards, thus, real-world commonsense may not apply to Harry's conversations; 2) Harry's behavior is strongly linked to background information in conversations: the scene, its attributes and its relationship to other speakers; and 3) Such backgrounds are dynamically altered as the storyline goes on. The HPD dataset, as the first dataset to facilitate the study of dialogue agent construction for characters within a story, provides rich contextual information about each dialogue session such as scenes, character attributes, and relations. More importantly, all the background information will change over the course of the story. In addition, HPD could support both dialogue generation and retrieval tasks. We evaluate baselines such as Dialog-GPT and BOB to determine the extent to which they can generate Harry Potter-like responses. The experimental results disappoint us in that although the generated responses are fluent, they still seem out of character for Harry. Besides, we validate the current most robust dialogue agent, ChatGPT, which also can't generate plausible Harry-Potter-like responses in some cases, either. Our results suggest that there is much scope for future research.
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与外部知识的接地对话系统是提高响应质量的一种有希望的方法。大多数现有的作品采用知识图(KGS)作为外部资源,关注对话的最后一句话中实体的贡献,以了解上下文理解和响应。然而,在多转变环境中隐含的知识与公斤关系之间的过渡规律之间的相关性是不足的。为此,我们提出了一个关系过渡意识知识的对话生成模型(RT-KGD)。具体而言,受到人类对话潜在逻辑的启发,我们的模型将对话级别的关系过渡规律与转向级实体语义信息相结合。以这种方式,知识之间的相互作用被认为是产生丰富的线索,以预测适当的知识并产生相干响应。自动评估和手动评估的实验结果表明,我们的模型表现优于最先进的基准。
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Interview has been regarded as one of the most crucial step for recruitment. To fully prepare for the interview with the recruiters, job seekers usually practice with mock interviews between each other. However, such a mock interview with peers is generally far away from the real interview experience: the mock interviewers are not guaranteed to be professional and are not likely to behave like a real interviewer. Due to the rapid growth of online recruitment in recent years, recruiters tend to have online interviews, which makes it possible to collect real interview data from real interviewers. In this paper, we propose a novel application named EZInterviewer, which aims to learn from the online interview data and provides mock interview services to the job seekers. The task is challenging in two ways: (1) the interview data are now available but still of low-resource; (2) to generate meaningful and relevant interview dialogs requires thorough understanding of both resumes and job descriptions. To address the low-resource challenge, EZInterviewer is trained on a very small set of interview dialogs. The key idea is to reduce the number of parameters that rely on interview dialogs by disentangling the knowledge selector and dialog generator so that most parameters can be trained with ungrounded dialogs as well as the resume data that are not low-resource. Evaluation results on a real-world job interview dialog dataset indicate that we achieve promising results to generate mock interviews. With the help of EZInterviewer, we hope to make mock interview practice become easier for job seekers.
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Natural Language Generation (NLG) has improved exponentially in recent years thanks to the development of sequence-to-sequence deep learning technologies such as Transformer-based language models. This advancement has led to more fluent and coherent NLG, leading to improved development in downstream tasks such as abstractive summarization, dialogue generation and data-to-text generation. However, it is also apparent that deep learning based generation is prone to hallucinate unintended text, which degrades the system performance and fails to meet user expectations in many real-world scenarios. To address this issue, many studies have been presented in measuring and mitigating hallucinated texts, but these have never been reviewed in a comprehensive manner before. In this survey, we thus provide a broad overview of the research progress and challenges in the hallucination problem in NLG. The survey is organized into two parts: (1) a general overview of metrics, mitigation methods, and future directions; and (2) an overview of task-specific research progress on hallucinations in the following downstream tasks, namely abstractive summarization, dialogue generation, generative question answering, data-to-text generation, machine translation, and visual-language generation. This survey serves to facilitate collaborative efforts among researchers in tackling the challenge of hallucinated texts in NLG.
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面向任务的对话框(TOD)系统通常需要与外部知识库的互动,以检索必要的实体(例如餐厅)信息以支持响应生成。大多数当前的端到端TOD系统要么明确检索KB信息,要么将其嵌入模型参数中以进行隐式访问。后一种方法显示出更高的灵活性和效率。在这两种方法中,系统都可以通过冲突的实体信息产生响应。为了解决此问题,我们建议先生成实体自动加压,并利用它来指导端到端系统中的响应生成。为了确保实体的一致性,我们对实体生成强加了三位一体的约束。我们还引入了logit串联策略,以促进梯度反向传播进行端到端培训。 Multiwoz 2.1单一和CAMREST的实验表明,我们的系统可以产生更多的高质量和实体一致的响应。
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Responding with multi-modal content has been recognized as an essential capability for an intelligent conversational agent. In this paper, we introduce the MMDialog dataset to better facilitate multi-modal conversation. MMDialog is composed of a curated set of 1.08 million real-world dialogues with 1.53 million unique images across 4,184 topics. MMDialog has two main and unique advantages. First, it is the largest multi-modal conversation dataset by the number of dialogues by 8x. Second, it contains massive topics to generalize the open-domain. To build engaging dialogue system with this dataset, we propose and normalize two response producing tasks based on retrieval and generative scenarios. In addition, we build two baselines for above tasks with state-of-the-art techniques and report their experimental performance. We also propose a novel evaluation metric MM-Relevance to measure the multi-modal responses. Our dataset and scripts are available in https://github.com/victorsungo/MMDialog.
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在本文中,我们介绍了基于大型预训练的语言模型(PLM)pangu-alpha(Zeng等,2021)的中国预训练的开放域对话生成模型。与其他对大量对话数据进行培训的预训练的对话模型不同,我们旨在通过继承PLM的有价值的语言能力和知识来构建强大的对话模型,并以相对较少的数据和计算成本构建强大的对话模型。为此,我们训练大型PLM Pangu-Alpha的Pangu-bot,该机器人已被证明在各种中国自然语言任务上表现出色。我们研究了pangu-bot产生的响应的不同方面,包括响应质量,知识和安全性。我们表明,Pangu-Bot优于最先进的中国对话系统(CDIALGPT(Wang等,2020),Eva(Zhou等,2021),EVA2.0(Gu等,2022)) W.R.T.以上三个方面。我们还证明,可以轻松地部署pangu-bot,以在没有进一步训练的情况下产生情感反应。在整个经验分析中,我们还指出,Pangu-bot响应质量,知识正确性和安全性仍然远非完美,进一步的探索对于建立可靠且智能的对话系统是必不可少的。我们的型号和代码将在https://github.com/huawei-noah/pretretaining-language-model/tree/master/master/pangu-bot上提供。
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知识驱动的对话世代最近取得了非凡的突破。与一般的对话系统相比,卓越的知识对话系统可以通过预先提供的知识产生更多信息和知识渊博的响应。但是,在实际应用中,对话系统无法事先提供相应的知识。为了解决该问题,我们设计了一个名为DRKQG的知识驱动的对话系统(\ emph {通过查询生成动态检索知识,以获取信息性对话响应})。具体而言,系统可以分为两个模块:查询生成模块和对话生成模块。首先,利用时间感知机制来捕获上下文信息,并可以生成查询以检索知识。然后,我们集成了复制机制和变压器,该机制允许响应生成模块产生从上下文和检索知识中得出的响应。 LIC2022,语言和情报技术竞赛的实验结果表明,我们的模块在自动评估指标上的大幅度优于基线模型,而BAIDU语言学团队的人类评估表明,我们的系统在事实上取得了令人印象深刻的结果,实际上是正确的,知识渊博。
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Knowledge-grounded dialogue systems powered by large language models often generate responses that, while fluent, are not attributable to a relevant source of information. Progress towards models that do not exhibit this issue requires evaluation metrics that can quantify its prevalence. To this end, we introduce the Benchmark for Evaluation of Grounded INteraction (BEGIN), comprised of 12k dialogue turns generated by neural dialogue systems trained on three knowledgegrounded dialogue corpora. We collect human annotations assessing the extent to which the models' responses can be attributed to the given background information. We then use BEGIN to analyze eight evaluation metrics. We find that these metrics rely on spurious correlations, do not reliably distinguish attributable abstractive responses from unattributable ones, and perform substantially worse when the knowledge source is longer. Our findings underscore the need for more sophisticated and robust evaluation metrics for knowledge-grounded dialogue. We make BEGIN publicly available at https://github.com/ google/BEGIN-dataset.
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对话摘要已被广泛研究和应用,其中,先前的作品主要集中在探索卓越的模型结构方面,以对准输入对话和输出摘要。然而,对于专业对话(例如,法律辩论和医学诊断),语义/统计对齐可能几乎不会填补输入对话话语话语和外部知识的摘要输出之间的逻辑/事实差距。在本文中,我们主要研究了非预介绍和预用环境下对话检验摘要(DIS)的事实不一致问题。创新的端到端对话摘要生成框架是有两个辅助任务:预期事实方面正规化(EFAR)和缺少事实实体歧视(MFED)。综合实验表明,该模型可以以准确的事实方面的覆盖率来产生更可读的总结,以及通知用户从输入对话中检测到的潜在缺失事实以获得进一步的人为干预。
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预先接受训练的语言模型的最新进展具有显着改善的神经反应生成。但是,现有方法通常将对话背景视为令牌的线性序列,并通过令牌级自我关注学习生成下一个单词。这些令牌级编码阻碍了话语中话语水平一致性的探索。本文介绍了对话贝特,这是一种新的会话响应生成模型,可以增强以前的基于PLM的对话模型。 DialogBert采用分层变压器架构。为了有效地捕捉话语中的话语水平一致性,我们提出了两种培训目标,包括蒙面的话语回归和分布式话语秩序与原始BERT训练相比。在三个多转对谈话数据集上的实验表明,在定量评估方面,我们的方法非常优于BART和Dialogpt等基线。人类评估表明,DialogBert比具有显着利润率的基线产生更加连贯,信息和人类的反应。
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