Geologic cores are rock samples that are extracted from deep under the ground during the well drilling process. They are used for petroleum reservoirs' performance characterization. Traditionally, physical studies of cores are carried out by the means of manual time-consuming experiments. With the development of deep learning, scientists actively started working on developing machine-learning-based approaches to identify physical properties without any manual experiments. Several previous works used machine learning to determine the porosity and permeability of the rocks, but either method was inaccurate or computationally expensive. We are proposing to use self-supervised pretraining of the very small CNN-transformer-based model to predict the physical properties of the rocks with high accuracy in a time-efficient manner. We show that this technique prevents overfitting even for extremely small datasets. Github: https://github.com/Shahbozjon/porosity-and-permeability-prediction

Covid-19大流行为感染检测和监测解决方案产生了重大的兴趣和需求。在本文中，我们提出了一种机器学习方法，可以使用在消费者设备上进行的录音来快速分离Covid-19。该方法将信号处理方法与微调深层学习网络相结合，提供了信号去噪，咳嗽检测和分类的方法。我们还开发并部署了一个移动应用程序，使用症状检查器与语音，呼吸和咳嗽信号一起使用，以检测Covid-19感染。该应用程序对两个开放的数据集和最终用户在测试版测试期间收集的嘈杂数据显示了鲁棒性能。

我们解决了现实世界用户生成的离散事件序列上的自我监督学习问题。自我监督的学习将来自原始数据的复杂信息包含在低维固定长度矢量表示中，这些信息可以轻松地应用于各种下游机器学习任务中。在本文中，我们提出了一种新方法“ COLES”，该方法将以前用于音频和计算机视觉域的对比度学习适应自我监督的设置中的离散事件序列域。我们根据大型欧洲金融服务公司的交易序列部署了COLES嵌入。 COLES嵌入的用法显着提高了预先存在的模型在下游任务上的性能，并产生了巨大的财务收益，每年以数亿美元的价格衡量。我们还在几个公共事件序列数据集上评估了COLES，并表明COLES表示在不同的下游任务上始终超过其他方法。