论文标题
普遍计算中的联合学习和灾难性遗忘：在HAR域中进行演示
Federated Learning and catastrophic forgetting in pervasive computing: demonstration in HAR domain
论文作者
论文摘要
联合学习已被引入新的机器学习范式，以增强本地设备的使用。在服务器级别，FL定期聚集在分布式客户端上本地学习的模型，以获得更通用的模型。这样，没有通过网络发送私人数据，并且降低了通信成本。但是，当前的解决方案依赖于客户端的大量存储数据的可用性，以微调服务器发送的模型。这种设置在移动性普遍计算中不现实，在该计算中必须保持数据存储较低，并且数据特征（分布）可能会发生巨大变化。为了解释这种可变性，解决方案是使用客户定期收集的数据来逐步调整接收到的模型。但是这种天真的方法使客户面临着灾难性遗忘的众所周知的问题。本文的目的是在智能手机的移动人类活动识别环境中证明这一问题。
Federated Learning has been introduced as a new machine learning paradigm enhancing the use of local devices. At a server level, FL regularly aggregates models learned locally on distributed clients to obtain a more general model. In this way, no private data is sent over the network, and the communication cost is reduced. However, current solutions rely on the availability of large amounts of stored data at the client side in order to fine-tune the models sent by the server. Such setting is not realistic in mobile pervasive computing where data storage must be kept low and data characteristic (distribution) can change dramatically. To account for this variability, a solution is to use the data regularly collected by the client to progressively adapt the received model. But such naive approach exposes clients to the well-known problem of catastrophic forgetting. The purpose of this paper is to demonstrate this problem in the mobile human activity recognition context on smartphones.
