Cybercriminals are moving towards zero-day attacks affecting resource-constrained devices such as single-board computers (SBC). Assuming that perfect security is unrealistic, Moving Target Defense (MTD) is a promising approach to mitigate attacks by dynamically altering target attack surfaces. Still, selecting suitable MTD techniques for zero-day attacks is an open challenge. Reinforcement Learning (RL) could be an effective approach to optimize the MTD selection through trial and error, but the literature fails when i) evaluating the performance of RL and MTD solutions in real-world scenarios, ii) studying whether behavioral fingerprinting is suitable for representing SBC's states, and iii) calculating the consumption of resources in SBC. To improve these limitations, the work at hand proposes an online RL-based framework to learn the correct MTD mechanisms mitigating heterogeneous zero-day attacks in SBC. The framework considers behavioral fingerprinting to represent SBCs' states and RL to learn MTD techniques that mitigate each malicious state. It has been deployed on a real IoT crowdsensing scenario with a Raspberry Pi acting as a spectrum sensor. More in detail, the Raspberry Pi has been infected with different samples of command and control malware, rootkits, and ransomware to later select between four existing MTD techniques. A set of experiments demonstrated the suitability of the framework to learn proper MTD techniques mitigating all attacks (except a harmfulness rootkit) while consuming <1 MB of storage and utilizing <55% CPU and <80% RAM.
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The upcoming exascale era will provide a new generation of physics simulations. These simulations will have a high spatiotemporal resolution, which will impact the training of machine learning models since storing a high amount of simulation data on disk is nearly impossible. Therefore, we need to rethink the training of machine learning models for simulations for the upcoming exascale era. This work presents an approach that trains a neural network concurrently to a running simulation without storing data on a disk. The training pipeline accesses the training data by in-memory streaming. Furthermore, we apply methods from the domain of continual learning to enhance the generalization of the model. We tested our pipeline on the training of a 3d autoencoder trained concurrently to laser wakefield acceleration particle-in-cell simulation. Furthermore, we experimented with various continual learning methods and their effect on the generalization.
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基于航空图像的地图中的本地化提供了许多优势,例如全球一致性,地理参考地图以及可公开访问数据的可用性。但是,从空中图像和板载传感器中可以观察到的地标是有限的。这导致数据关联期间的歧义或混叠。本文以高度信息的代表制(允许有效的数据关联)为基础,为解决这些歧义提供了完整的管道。它的核心是强大的自我调整数据关联,它根据测量的熵调整搜索区域。此外,为了平滑最终结果,我们将相关数据的信息矩阵调整为数据关联过程产生的相对变换的函数。我们评估了来自德国卡尔斯鲁厄市周围城市和农村场景的真实数据的方法。我们将最新的异常缓解方法与我们的自我调整方法进行了比较,这表明了相当大的改进,尤其是对于外部城市场景。
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平均网络集合的预测是改善各种基准和kaggle竞争中预测性能和计算的尖端有效方法。但是,深层合奏的Thruntime和培训成本随着整体的规模线性增长,使它们不适合许多应用。平均重量的权重代替预测规定了这种不利性推断,通常应用于模型的中间检查点以降低训练成本。尽管有效,但只有很少的作品可以平均体重的理解和表现。我们描述了重量必须符合体重空间,功能空间和损失的互动的先决条件。此外,我们介绍了新的测试方法(称为Oracle测试),以测量权重之间的功能空间。我们证明了我们的WF战略在艺术分割CNN和变形金刚以及BDD100K和CityScapes等现实世界中的多功能性。我们将WF与类似的操作进行了比较,并显示了我们对预测性能和校准的分布数据术语的优势。
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虽然在文献中广泛研究了完整的本地化方法,但它们的数据关联和数据表示子过程通常会被忽视。但是,两者都是最终姿势估计的关键部分。在这项工作中,我们介绍了DA-LMR(Delta-AngeS Lane标记表示),在本地化方法的上下文中具有强大的数据表示。我们提出了一种在每个点中的曲线改变的车道标记的表示,并且在附加维度中包括该信息,从而提供了更详细的数据的几何结构描述。我们还提出了DC-SAC(距离兼容的样本共识),数据关联方法。这是一个启发式版Ransac,通过距离兼容性限制大大减少了假设空间。我们将呈现的方法与一些最先进的数据表示和数据关联方法进行比较,以不同的嘈杂场景。 DA-LMR和DC-SAC在比较方面产生最有前途的组合,精度达到98.1%,并且对于标准偏差0.5米的嘈杂数据召回99.7%。
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信号处理是几乎任何传感器系统的基本组件,具有不同科学学科的广泛应用。时间序列数据,图像和视频序列包括可以增强和分析信息提取和量化的代表性形式的信号。人工智能和机器学习的最近进步正在转向智能,数据驱动,信号处理的研究。该路线图呈现了最先进的方法和应用程序的关键概述,旨在突出未来的挑战和对下一代测量系统的研究机会。它涵盖了广泛的主题,从基础到工业研究,以简明的主题部分组织,反映了每个研究领域的当前和未来发展的趋势和影响。此外,它为研究人员和资助机构提供了识别新前景的指导。
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