Filming sport videos from an aerial view has always been a hard and an expensive task to achieve, especially in sports that require a wide open area for its normal development or the ones that put in danger human safety. Recently, a new solution arose for aerial filming based on the use of Unmanned Aerial Vehicles (UAVs), which is substantially cheaper than traditional aerial filming solutions that require conventional aircrafts like helicopters or complex structures for wide mobility. In this paper, we describe the design process followed for building a customized UAV suitable for sports aerial filming. The process includes the requirements definition, technical sizing and selection of mechanical, hardware and software technologies, as well as the whole integration and operation settings. One of the goals is to develop technologies allowing to build low cost UAVs and to manage them for a wide range of usage scenarios while achieving high levels of flexibility and automation. This work also shows some technical issues found during the development of the UAV as well as the solutions implemented.

联合学习使不同的各方能够在服务器的编排下协作建立全球模型，同时将培训数据保留在客户的设备上。但是，当客户具有异质数据时，性能会受到影响。为了解决这个问题，我们假设尽管数据异质性，但有些客户的数据分布可以集群。在以前的方法中，为了群集客户端，服务器要求客户端同时发送参数。但是，在有大量参与者可能有限的参与者的情况下，这可能是有问题的。为了防止这种瓶颈，我们提出了FLIC（使用增量聚类的联合学习），其中服务器利用客户在联合培训期间发送的客户发送的更新，而不是要求他们同时发送参数。因此，除了经典的联合学习所需的内容外，服务器与客户之间没有任何其他沟通。我们从经验上证明了各种非IID案例，我们的方法成功地按照相同的数据分布将客户分组分组。我们还通过研究其能力在联邦学习过程的早期阶段对客户进行分配的能力来确定FLIC的局限性。我们进一步将对模型的攻击作为数据异质性的一种形式，并从经验上表明，即使恶意客户的比例高于50 \％，FLIC也是针对中毒攻击的强大防御。