基于骨架的识别系统正在获得流行，并在骨骼中关注点或关节的机器学习模型已被证明在机器人技术等许多领域具有计算有效和应用。很容易跟踪点，从而保存空间和时间信息，这在抽象所需信息中起着重要作用，分类成为一项容易的任务。在本文中，我们旨在研究这些要点，但使用云机制，在该机制中我们将云定义为点的集合。但是，当我们添加时间信息时，可能不可能检索每个帧中一个点的坐标，而不是专注于单个点，我们可以使用k-neighbors来检索所讨论的观点的状态。我们的重点是使用重量共享收集此类信息，但请确保当我们尝试从邻居那里检索信息时，我们不会随身携带噪音。 LSTM具有长期建模功能，并且可以携带时间和空间信息。在本文中，我们试图总结基于图的手势识别方法。

癌症是人体内部异常细胞的无法控制的细胞分裂，可以蔓延到其他身体器官。它是非传染性疾病（NCDS）和NCDS之一，占全世界总死亡人数的71％，而肺癌是女性乳腺癌后第二次诊断的癌症。肺癌的癌症生存率仅为19％。有各种方法用于诊断肺癌，如X射线，CT扫描，PET-CT扫描，支气管镜检查和活组织检查。然而，为了了解基于组织型H和E染色的肺癌亚型，广泛使用，其中染色在从活组织检查中吸入的组织上进行。研究报道，组织学类型与肺癌预后和治疗相关。因此，早期和准确地检测肺癌组织学是一种迫切需要，并且由于其治疗取决于疾病的组织学，分子曲线和阶段的类型，最重要的是分析肺癌的组织病理学图像。因此，为了加快肺癌诊断的重要过程，减少病理学家的负担，使用深层学习技术。这些技术表明了在分析癌症组织病变幻灯片的分析中提高了疗效。几项研究报告说，卷积神经网络（CNN）在脑，皮肤，乳腺癌，肺癌等各种癌症类型的组织病理学图片的分类中的重要性。在本研究中，通过使用Reset50，VGG-19，Inception_Resnet_V2和DenSenet进行特征提取和三重态丢失来引导CNN以引导CNN，以引导CNN，以引导CNN使得其增加群集间距离并减少集群内距离。

Cloth in the real world is often crumpled, self-occluded, or folded in on itself such that key regions, such as corners, are not directly graspable, making manipulation difficult. We propose a system that leverages visual and tactile perception to unfold the cloth via grasping and sliding on edges. By doing so, the robot is able to grasp two adjacent corners, enabling subsequent manipulation tasks like folding or hanging. As components of this system, we develop tactile perception networks that classify whether an edge is grasped and estimate the pose of the edge. We use the edge classification network to supervise a visuotactile edge grasp affordance network that can grasp edges with a 90% success rate. Once an edge is grasped, we demonstrate that the robot can slide along the cloth to the adjacent corner using tactile pose estimation/control in real time. See http://nehasunil.com/visuotactile/visuotactile.html for videos.

Gradient-based first-order convex optimization algorithms find widespread applicability in a variety of domains, including machine learning tasks. Motivated by the recent advances in fixed-time stability theory of continuous-time dynamical systems, we introduce a generalized framework for designing accelerated optimization algorithms with strongest convergence guarantees that further extend to a subclass of non-convex functions. In particular, we introduce the \emph{GenFlow} algorithm and its momentum variant that provably converge to the optimal solution of objective functions satisfying the Polyak-{\L}ojasiewicz (PL) inequality, in a fixed-time. Moreover for functions that admit non-degenerate saddle-points, we show that for the proposed GenFlow algorithm, the time required to evade these saddle-points is bounded uniformly for all initial conditions. Finally, for strongly convex-strongly concave minimax problems whose optimal solution is a saddle point, a similar scheme is shown to arrive at the optimal solution again in a fixed-time. The superior convergence properties of our algorithm are validated experimentally on a variety of benchmark datasets.

Power grids, across the world, play an important societal and economical role by providing uninterrupted, reliable and transient-free power to several industries, businesses and household consumers. With the advent of renewable power resources and EVs resulting into uncertain generation and highly dynamic load demands, it has become ever so important to ensure robust operation of power networks through suitable management of transient stability issues and localize the events of blackouts. In the light of ever increasing stress on the modern grid infrastructure and the grid operators, this paper presents a reinforcement learning (RL) framework, PowRL, to mitigate the effects of unexpected network events, as well as reliably maintain electricity everywhere on the network at all times. The PowRL leverages a novel heuristic for overload management, along with the RL-guided decision making on optimal topology selection to ensure that the grid is operated safely and reliably (with no overloads). PowRL is benchmarked on a variety of competition datasets hosted by the L2RPN (Learning to Run a Power Network). Even with its reduced action space, PowRL tops the leaderboard in the L2RPN NeurIPS 2020 challenge (Robustness track) at an aggregate level, while also being the top performing agent in the L2RPN WCCI 2020 challenge. Moreover, detailed analysis depicts state-of-the-art performances by the PowRL agent in some of the test scenarios.

Federated Deep Learning frameworks can be used strategically to monitor Land Use locally and infer environmental impacts globally. Distributed data from across the world would be needed to build a global model for Land Use classification. The need for a Federated approach in this application domain would be to avoid transfer of data from distributed locations and save network bandwidth to reduce communication cost. We use a Federated UNet model for Semantic Segmentation of satellite and street view images. The novelty of the proposed architecture is the integration of Knowledge Distillation to reduce communication cost and response time. The accuracy obtained was above 95% and we also brought in a significant model compression to over 17 times and 62 times for street View and satellite images respectively. Our proposed framework has the potential to be a game-changer in real-time tracking of climate change across the planet.

Ensuring safety is of paramount importance in physical human-robot interaction applications. This requires both an adherence to safety constraints defined on the system state, as well as guaranteeing compliant behaviour of the robot. If the underlying dynamical system is known exactly, the former can be addressed with the help of control barrier functions. Incorporation of elastic actuators in the robot's mechanical design can address the latter requirement. However, this elasticity can increase the complexity of the resulting system, leading to unmodeled dynamics, such that control barrier functions cannot directly ensure safety. In this paper, we mitigate this issue by learning the unknown dynamics using Gaussian process regression. By employing the model in a feedback linearizing control law, the safety conditions resulting from control barrier functions can be robustified to take into account model errors, while remaining feasible. In order enforce them on-line, we formulate the derived safety conditions in the form of a second-order cone program. We demonstrate our proposed approach with simulations on a two-degree of freedom planar robot with elastic joints.

Low-field (LF) MRI scanners have the power to revolutionize medical imaging by providing a portable and cheaper alternative to high-field MRI scanners. However, such scanners are usually significantly noisier and lower quality than their high-field counterparts. The aim of this paper is to improve the SNR and overall image quality of low-field MRI scans to improve diagnostic capability. To address this issue, we propose a Nested U-Net neural network architecture super-resolution algorithm that outperforms previously suggested deep learning methods with an average PSNR of 78.83 and SSIM of 0.9551. We tested our network on artificial noisy downsampled synthetic data from a major T1 weighted MRI image dataset called the T1-mix dataset. One board-certified radiologist scored 25 images on the Likert scale (1-5) assessing overall image quality, anatomical structure, and diagnostic confidence across our architecture and other published works (SR DenseNet, Generator Block, SRCNN, etc.). We also introduce a new type of loss function called natural log mean squared error (NLMSE). In conclusion, we present a more accurate deep learning method for single image super-resolution applied to synthetic low-field MRI via a Nested U-Net architecture.

早期发现阿尔茨海默氏病对于部署干预措施和减慢疾病进展至关重要。在过去的十年中，已经探索了许多机器学习和深度学习算法，目的是为阿尔茨海默氏症建立自动检测。数据增强技术和先进的深度学习体系结构的进步已经在该领域开辟了新的边界，研究正在快速发展。因此，这项调查的目的是概述有关阿尔茨海默氏病诊断深度学习模型的最新研究。除了对众多数据源，神经网络架构以及常用的评估措施进行分类外，我们还对实施和可重复性进行了分类。我们的目标是协助感兴趣的研究人员跟上最新的发展，并将早期的调查作为基准。此外，我们还指出了该主题的未来研究方向。

自从各种任务的自动化开始以来，自动驾驶车辆一直引起人们的兴趣。人类容易疲惫，在道路上的响应时间缓慢，最重要的是，每年约有135万道路交通事故死亡，这已经是一项危险的任务。预计自动驾驶可以减少世界上驾驶事故的数量，这就是为什么这个问题对研究人员感兴趣的原因。目前，自动驾驶汽车在使车辆自动驾驶时使用不同的算法来实现各种子问题。我们将重点关注增强学习算法，更具体地说是Q学习算法和增强拓扑的神经进化（NEAT），即进化算法和人工神经网络的组合，以训练模型代理，以学习如何在给定路径上驱动。本文将重点介绍上述两种算法之间的比较。