Autoregressive processes naturally arise in a large variety of real-world scenarios, including e.g., stock markets, sell forecasting, weather prediction, advertising, and pricing. When addressing a sequential decision-making problem in such a context, the temporal dependence between consecutive observations should be properly accounted for converge to the optimal decision policy. In this work, we propose a novel online learning setting, named Autoregressive Bandits (ARBs), in which the observed reward follows an autoregressive process of order $k$, whose parameters depend on the action the agent chooses, within a finite set of $n$ actions. Then, we devise an optimistic regret minimization algorithm AutoRegressive Upper Confidence Bounds (AR-UCB) that suffers regret of order $\widetilde{\mathcal{O}} \left( \frac{(k+1)^{3/2}\sqrt{nT}}{(1-\Gamma)^2} \right)$, being $T$ the optimization horizon and $\Gamma < 1$ an index of the stability of the system. Finally, we present a numerical validation in several synthetic and one real-world setting, in comparison with general and specific purpose bandit baselines showing the advantages of the proposed approach.

我们研究在线学习问题，决策者必须采取一系列决策，但要受到$ M $长期约束。决策者的目标是最大程度地提高其总奖励，同时达到小累积约束，在$ t $回合中违规。我们介绍了此一般类问题的第一个最佳世界类型算法，在根据未知随机模型选择奖励和约束的情况下，无需保证，在它们的情况下，在他们的情况下选择了奖励和约束。在每个回合中由对手选择。我们的算法是关于满足长期约束的最佳固定策略的第一个在对抗环境中提供保证的算法。特别是，它保证了$ \ rho/（1+ \ rho）$的最佳奖励和额定性遗憾，其中$ \ rho $是与严格可行的解决方案有关的可行性参数。我们的框架采用传统的遗憾最小化器作为黑盒组件。因此，通过使用适当的遗憾最小化器进行实例化，它可以处理全反馈以及强盗反馈设置。此外，它允许决策者通过非凸奖励和约束无缝处理场景。我们展示了如何在重复拍卖的预算管理机制的背景下应用我们的框架，以保证不包装的长期约束（例如，ROI约束）。

我们研究了一个知情的发件人面临的重复信息设计问题，该问题试图影响自我利益接收者的行为。我们考虑接收器面临顺序决策（SDM）问题的设置。在每回合中，发件人都会观察SDM问题中随机事件的实现。这会面临如何逐步向接收者披露此类信息以说服他们遵循（理想的）行动建议的挑战。我们研究了发件人不知道随机事件概率的情况，因此，他们必须在说服接收器的同时逐渐学习它们。首先，我们提供了发件人说服力信息结构集的非平凡的多面近似。这对于设计有效的学习算法至关重要。接下来，我们证明了一个负面的结果：没有学习算法可以说服力。因此，我们通过关注算法来保证接收者对以下建议的遗憾会增长，从而放松说服力。在全反馈设置（发件人观察所有随机事件实现）中，我们提供了一种算法，其中包括$ \ tilde {o}（\ sqrt {t}）$ sexter和接收者遗憾。取而代之的是，在Bandit反馈设置中 - 发件人仅观察SDM问题中实际发生的随机事件的实现 - 我们设计了一种算法，给定一个$ \ alpha \ in [1/2，1] $作为输入，确保$ \ tilde {o}（{t^\ alpha}）$和$ \ tilde {o}（t^{\ max \ arpha，1- \ frac {\ frac {\ alpha} }）$遗憾，分别为发件人和接收器。该结果补充了下限，表明这种遗憾的权衡本质上是紧张的。

\ emph {ex ante}相关性正在成为\ emph {顺序对抗团队游戏}的主流方法，其中一组球员在零和游戏中面对另一支球队。众所周知，团队成员的不对称信息同时使平衡计算\ textsf {apx} - hard和团队的策略在游戏树上不可直接表示。后一个问题阻止采用成功的2个玩家零和游戏的成功工具，例如，\ emph {e.g。}，抽象，无regret学习和子游戏求解。这项工作表明，我们可以通过弥合顺序对抗团队游戏和2次玩家游戏之间的差距来恢复这种弱点。特别是，我们提出了一种新的，合适的游戏表示形式，我们称之为\ emph {Team-Public-information}，其中团队被代表为单个协调员，他只知道整个团队的共同信息，并向每个成员开出一个行动对于任何可能的私人状态。最终的表示形式是高度\ emph {可解释}，是一棵2播放器树，在设计抽象时，团队的策略具有直接解释和更具表现力的行为，并且具有更高的表现力。此外，我们证明了代表性的回报等效性，并提供了直接从广泛形式开始的技术，从而在没有信息损失的情况下产生了更紧凑的表示形式。最后，我们在应用于标准测试床上的技术时对技术进行了实验评估，并将它们的性能与当前的最新状态进行了比较。

在正常游戏中，简单，未耦合的无regret动态与相关的平衡是多代理系统理论的著名结果。具体而言，已知20多年来，当所有玩家都试图在重复的正常游戏中最大程度地减少其内部遗憾时，游戏的经验频率会收敛于正常形式相关的平衡。广泛的形式（即树形）游戏通过对顺序和同时移动以及私人信息进行建模，从而推广正常形式的游戏。由于游戏中部分信息的顺序性质和存在，因此广泛的形式相关性具有与正常形式的属性明显不同，而正常形式的相关性仍然是开放的研究方向。已经提出了广泛的形式相关平衡（EFCE）作为自然的广泛形式与正常形式相关平衡。但是，目前尚不清楚EFCE是否是由于未耦合的代理动力学而出现的。在本文中，我们给出了第一个未耦合的无regret动态，该动态将$ n $ n $ - 玩家的General-sum大型游戏收敛于EFCE，并带有完美的回忆。首先，我们在广泛的游戏中介绍了触发遗憾的概念，这扩展了正常游戏中的内部遗憾。当每个玩家的触发后悔低时，游戏的经验频率接近EFCE。然后，我们给出有效的无触发式算法。我们的算法在每个决策点在每个决策点上都会从每个决策点构建播放器的全球策略，从而将触发遗憾分解为本地子问题。

In the future, service robots are expected to be able to operate autonomously for long periods of time without human intervention. Many work striving for this goal have been emerging with the development of robotics, both hardware and software. Today we believe that an important underpinning of long-term robot autonomy is the ability of robots to learn on site and on-the-fly, especially when they are deployed in changing environments or need to traverse different environments. In this paper, we examine the problem of long-term autonomy from the perspective of robot learning, especially in an online way, and discuss in tandem its premise "data" and the subsequent "deployment".

A systematic review on machine-learning strategies for improving generalizability (cross-subjects and cross-sessions) electroencephalography (EEG) based in emotion classification was realized. In this context, the non-stationarity of EEG signals is a critical issue and can lead to the Dataset Shift problem. Several architectures and methods have been proposed to address this issue, mainly based on transfer learning methods. 418 papers were retrieved from the Scopus, IEEE Xplore and PubMed databases through a search query focusing on modern machine learning techniques for generalization in EEG-based emotion assessment. Among these papers, 75 were found eligible based on their relevance to the problem. Studies lacking a specific cross-subject and cross-session validation strategy and making use of other biosignals as support were excluded. On the basis of the selected papers' analysis, a taxonomy of the studies employing Machine Learning (ML) methods was proposed, together with a brief discussion on the different ML approaches involved. The studies with the best results in terms of average classification accuracy were identified, supporting that transfer learning methods seem to perform better than other approaches. A discussion is proposed on the impact of (i) the emotion theoretical models and (ii) psychological screening of the experimental sample on the classifier performances.

We introduce a new probabilistic temporal logic for the verification of Markov Decision Processes (MDP). Our logic is the first to include operators for causal reasoning, allowing us to express interventional and counterfactual queries. Given a path formula $\phi$, an interventional property is concerned with the satisfaction probability of $\phi$ if we apply a particular change $I$ to the MDP (e.g., switching to a different policy); a counterfactual allows us to compute, given an observed MDP path $\tau$, what the outcome of $\phi$ would have been had we applied $I$ in the past. For its ability to reason about different configurations of the MDP, our approach represents a departure from existing probabilistic temporal logics that can only reason about a fixed system configuration. From a syntactic viewpoint, we introduce a generalized counterfactual operator that subsumes both interventional and counterfactual probabilities as well as the traditional probabilistic operator found in e.g., PCTL. From a semantics viewpoint, our logic is interpreted over a structural causal model (SCM) translation of the MDP, which gives us a representation amenable to counterfactual reasoning. We provide a proof-of-concept evaluation of our logic on a reach-avoid task in a grid-world model.

Brain decoding is a field of computational neuroscience that uses measurable brain activity to infer mental states or internal representations of perceptual inputs. Therefore, we propose a novel approach to brain decoding that also relies on semantic and contextual similarity. We employ an fMRI dataset of natural image vision and create a deep learning decoding pipeline inspired by the existence of both bottom-up and top-down processes in human vision. We train a linear brain-to-feature model to map fMRI activity features to visual stimuli features, assuming that the brain projects visual information onto a space that is homeomorphic to the latent space represented by the last convolutional layer of a pretrained convolutional neural network, which typically collects a variety of semantic features that summarize and highlight similarities and differences between concepts. These features are then categorized in the latent space using a nearest-neighbor strategy, and the results are used to condition a generative latent diffusion model to create novel images. From fMRI data only, we produce reconstructions of visual stimuli that match the original content very well on a semantic level, surpassing the state of the art in previous literature. We evaluate our work and obtain good results using a quantitative semantic metric (the Wu-Palmer similarity metric over the WordNet lexicon, which had an average value of 0.57) and perform a human evaluation experiment that resulted in correct evaluation, according to the multiplicity of human criteria in evaluating image similarity, in over 80% of the test set.

The fifth generation of the Radio Access Network (RAN) has brought new services, technologies, and paradigms with the corresponding societal benefits. However, the energy consumption of 5G networks is today a concern. In recent years, the design of new methods for decreasing the RAN power consumption has attracted interest from both the research community and standardization bodies, and many energy savings solutions have been proposed. However, there is still a need to understand the power consumption behavior of state-ofthe-art base station architectures, such as multi-carrier active antenna units (AAUs), as well as the impact of different network parameters. In this paper, we present a power consumption model for 5G AAUs based on artificial neural networks. We demonstrate that this model achieves good estimation performance, and it is able to capture the benefits of energy saving when dealing with the complexity of multi-carrier base stations architectures. Importantly, multiple experiments are carried out to show the advantage of designing a general model able to capture the power consumption behaviors of different types of AAUs. Finally, we provide an analysis of the model scalability and the training data requirements.