在AI研究中，合成动作计划通常使用了抽象地指定由于动作而导致的动作的描述性模型，并针对有效计算状态转换来定制。然而，执行计划的动作已经需要运行模型，其中使用丰富的计算控制结构和闭环在线决策来指定如何在非预定的执行上下文中执行动作，对事件作出反应并适应展开情况。整合行动和规划的审议演员通常需要将这两种模型一起使用 - 在尝试开发不同的型号时会导致问题，验证它们的一致性，并顺利交错和规划。作为替代方案，我们定义和实施综合作用和规划系统，其中规划和行为使用相同的操作模型。这些依赖于提供丰富的控制结构的分层任务导向的细化方法。称为反应作用发动机（RAE）的作用组件由众所周知的PRS系统启发。在每个决定步骤中，RAE可以从计划者获取建议，以获得关于效用功能的近乎最佳选择。随时计划使用像UPOM的UCT类似的蒙特卡罗树搜索程序，其推出是演员操作模型的模拟。我们还提供与RAE和UPOM一起使用的学习策略，从在线代理体验和/或模拟计划结果，从决策背景下映射到方法实例以及引导UPOM的启发式函数。我们展示了富豪朝向静态域的最佳方法的渐近融合，并在实验上展示了UPOM和学习策略显着提高了作用效率和鲁棒性。

Random graph models with community structure have been studied extensively in the literature. For both the problems of detecting and recovering community structure, an interesting landscape of statistical and computational phase transitions has emerged. A natural unanswered question is: might it be possible to infer properties of the community structure (for instance, the number and sizes of communities) even in situations where actually finding those communities is believed to be computationally hard? We show the answer is no. In particular, we consider certain hypothesis testing problems between models with different community structures, and we show (in the low-degree polynomial framework) that testing between two options is as hard as finding the communities. In addition, our methods give the first computational lower bounds for testing between two different `planted' distributions, whereas previous results have considered testing between a planted distribution and an i.i.d. `null' distribution.

The number of international benchmarking competitions is steadily increasing in various fields of machine learning (ML) research and practice. So far, however, little is known about the common practice as well as bottlenecks faced by the community in tackling the research questions posed. To shed light on the status quo of algorithm development in the specific field of biomedical imaging analysis, we designed an international survey that was issued to all participants of challenges conducted in conjunction with the IEEE ISBI 2021 and MICCAI 2021 conferences (80 competitions in total). The survey covered participants' expertise and working environments, their chosen strategies, as well as algorithm characteristics. A median of 72% challenge participants took part in the survey. According to our results, knowledge exchange was the primary incentive (70%) for participation, while the reception of prize money played only a minor role (16%). While a median of 80 working hours was spent on method development, a large portion of participants stated that they did not have enough time for method development (32%). 25% perceived the infrastructure to be a bottleneck. Overall, 94% of all solutions were deep learning-based. Of these, 84% were based on standard architectures. 43% of the respondents reported that the data samples (e.g., images) were too large to be processed at once. This was most commonly addressed by patch-based training (69%), downsampling (37%), and solving 3D analysis tasks as a series of 2D tasks. K-fold cross-validation on the training set was performed by only 37% of the participants and only 50% of the participants performed ensembling based on multiple identical models (61%) or heterogeneous models (39%). 48% of the respondents applied postprocessing steps.

Human operators in human-robot teams are commonly perceived to be critical for mission success. To explore the direct and perceived impact of operator input on task success and team performance, 16 real-world missions (10 hrs) were conducted based on the DARPA Subterranean Challenge. These missions were to deploy a heterogeneous team of robots for a search task to locate and identify artifacts such as climbing rope, drills and mannequins representing human survivors. Two conditions were evaluated: human operators that could control the robot team with state-of-the-art autonomy (Human-Robot Team) compared to autonomous missions without human operator input (Robot-Autonomy). Human-Robot Teams were often in directed autonomy mode (70% of mission time), found more items, traversed more distance, covered more unique ground, and had a higher time between safety-related events. Human-Robot Teams were faster at finding the first artifact, but slower to respond to information from the robot team. In routine conditions, scores were comparable for artifacts, distance, and coverage. Reasons for intervention included creating waypoints to prioritise high-yield areas, and to navigate through error-prone spaces. After observing robot autonomy, operators reported increases in robot competency and trust, but that robot behaviour was not always transparent and understandable, even after high mission performance.

Monocular Depth Estimation (MDE) is a fundamental problem in computer vision with numerous applications. Recently, LIDAR-supervised methods have achieved remarkable per-pixel depth accuracy in outdoor scenes. However, significant errors are typically found in the proximity of depth discontinuities, i.e., depth edges, which often hinder the performance of depth-dependent applications that are sensitive to such inaccuracies, e.g., novel view synthesis and augmented reality. Since direct supervision for the location of depth edges is typically unavailable in sparse LIDAR-based scenes, encouraging the MDE model to produce correct depth edges is not straightforward. In this work we propose to learn to detect the location of depth edges from densely-supervised synthetic data, and use it to generate supervision for the depth edges in the MDE training. %Despite the 'domain gap' between synthetic and real data, we show that depth edges that are estimated directly are significantly more accurate than the ones that emerge indirectly from the MDE training. To quantitatively evaluate our approach, and due to the lack of depth edges ground truth in LIDAR-based scenes, we manually annotated subsets of the KITTI and the DDAD datasets with depth edges ground truth. We demonstrate significant gains in the accuracy of the depth edges with comparable per-pixel depth accuracy on several challenging datasets.

Understanding pedestrian behavior patterns is a key component to building autonomous agents that can navigate among humans. We seek a learned dictionary of pedestrian behavior to obtain a semantic description of pedestrian trajectories. Supervised methods for dictionary learning are impractical since pedestrian behaviors may be unknown a priori and the process of manually generating behavior labels is prohibitively time consuming. We instead utilize a novel, unsupervised framework to create a taxonomy of pedestrian behavior observed in a specific space. First, we learn a trajectory latent space that enables unsupervised clustering to create an interpretable pedestrian behavior dictionary. We show the utility of this dictionary for building pedestrian behavior maps to visualize space usage patterns and for computing the distributions of behaviors. We demonstrate a simple but effective trajectory prediction by conditioning on these behavior labels. While many trajectory analysis methods rely on RNNs or transformers, we develop a lightweight, low-parameter approach and show results comparable to SOTA on the ETH and UCY datasets.

Our goal is to reconstruct tomographic images with few measurements and a low signal-to-noise ratio. In clinical imaging, this helps to improve patient comfort and reduce radiation exposure. As quantum computing advances, we propose to use an adiabatic quantum computer and associated hybrid methods to solve the reconstruction problem. Tomographic reconstruction is an ill-posed inverse problem. We test our reconstruction technique for image size, noise content, and underdetermination of the measured projection data. We then present the reconstructed binary and integer-valued images of up to 32 by 32 pixels. The demonstrated method competes with traditional reconstruction algorithms and is superior in terms of robustness to noise and reconstructions from few projections. We postulate that hybrid quantum computing will soon reach maturity for real applications in tomographic reconstruction. Finally, we point out the current limitations regarding the problem size and interpretability of the algorithm.

We propose a very fast frame-level model for anomaly detection in video, which learns to detect anomalies by distilling knowledge from multiple highly accurate object-level teacher models. To improve the fidelity of our student, we distill the low-resolution anomaly maps of the teachers by jointly applying standard and adversarial distillation, introducing an adversarial discriminator for each teacher to distinguish between target and generated anomaly maps. We conduct experiments on three benchmarks (Avenue, ShanghaiTech, UCSD Ped2), showing that our method is over 7 times faster than the fastest competing method, and between 28 and 62 times faster than object-centric models, while obtaining comparable results to recent methods. Our evaluation also indicates that our model achieves the best trade-off between speed and accuracy, due to its previously unheard-of speed of 1480 FPS. In addition, we carry out a comprehensive ablation study to justify our architectural design choices.

深度神经网络已被证明容易受到基于语义特征扰动输入的对抗性攻击。现有的鲁棒性分析仪可以建议语义特征社区提高网络的可靠性。但是，尽管这些技术取得了重大进展，但他们仍然很难扩展到深层网络和大型社区。在这项工作中，我们介绍了VEEP，这是一种主动学习方法，将验证过程分为一系列较小的验证步骤，每个验证步骤都会提交给现有的鲁棒性分析仪。关键想法是基于先前的步骤来预测下一个最佳步骤。通过参数回归估算认证速度和灵敏度来预测最佳步骤。我们评估了MNIST，时尚摄影师，CIFAR-10和Imagenet的VEEP，并表明它可以分析各种特征的邻域：亮度，对比度，色相，饱和度和轻度。我们表明，平均而言，鉴于90分钟的超时，VEEP在29分钟内验证了96％的最大认证社区，而现有的拆分接近近距离验证，平均在58分钟内验证了73％的最大认证社区的73％。

近年来，深入的强化学习（DRL）在模拟机器人控制任务中都取得了巨大进步。然而，将DRL应用于新型机器人控制任务仍然具有挑战性，尤其是当研究人员必须设计动作和观察空间以及奖励功能时。在本文中，我们研究了部分可观察性，作为将DRL应用于机器人控制任务的潜在失败来源，当研究人员不相信观察空间是否完全代表基本状态时，可能会发生这种情况。我们比较了各种部分可观察性条件下的三种常见DRL算法TD3，SAC和PPO的性能。我们发现TD3和SAC很容易被卡在本地Optima和表现不佳的PPO中。我们提出了香草TD3和SAC的多步版本，以改善基于一步引导的部分可观察性的鲁棒性。