我们提出了一种估计具有标称分类数据的高维线性模型的方法。我们的估算器,称为范围,通过使其相应的系数完全相等来融合水平。这是通过对分类变量的系数的阶数统计之间的差异之间的差异来实现这一点,从而聚类系数。我们提供了一种算法,用于精确和有效地计算在具有潜在许多级别的单个变量的情况下的总体上的最小值的全局最小值,并且在多变量情况下在块坐标血管下降过程中使用它。我们表明,利用未知级别融合的Oracle最小二乘解决方案是具有高概率的坐标血缘的极限点,只要真正的级别具有一定的最小分离;已知这些条件在单变量案例中最小。我们展示了在一系列实际和模拟数据集中的范围的有利性能。 R包的R包Catreg实现线性模型的范围,也可以在CRAN上提供逻辑回归的版本。
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许多复杂的车辆系统,例如大型船舶,都包含诸如水箱之类的狭窄空间,这对于车辆的安全功能至关重要。由于有限的可及性,可见性和非结构化配置,因此人类检查此类空间尤为危险。尽管机器人提供了可行的替代方案,但它们在实现强大的自主权方面遇到了相同的挑战。在这项工作中,我们专门解决了使用基于视觉映射的系统依赖于Mahalanobis距离距离驱动的比较,在标称和在线地图之间进行局部异常识别的比较,该问题检测出限制空间内留下的异物碎片(FOD)。模拟试验显示出极高的召回率,但对于异常识别方法而言,精度较低。因此,远程人类的帮助是通过浏览离群区域的特写机器人摄像头图像来解决精度问题。进行了在线调查,以显示此援助过程的有用性。还报告了启用GPU的移动机器人平台内的物理实验,以证明FOD检测系统的可行性。
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Transfer learning increasingly becomes an important tool in handling data scarcity often encountered in machine learning. In the application of high-throughput thickness as a downstream process of the high-throughput optimization of optoelectronic thin films with autonomous workflows, data scarcity occurs especially for new materials. To achieve high-throughput thickness characterization, we propose a machine learning model called thicknessML that predicts thickness from UV-Vis spectrophotometry input and an overarching transfer learning workflow. We demonstrate the transfer learning workflow from generic source domain of generic band-gapped materials to specific target domain of perovskite materials, where the target domain data only come from limited number (18) of refractive indices from literature. The target domain can be easily extended to other material classes with a few literature data. Defining thickness prediction accuracy to be within-10% deviation, thicknessML achieves 92.2% (with a deviation of 3.6%) accuracy with transfer learning compared to 81.8% (with a deviation of 3.6%) 11.7% without (lower mean and larger standard deviation). Experimental validation on six deposited perovskite films also corroborates the efficacy of the proposed workflow by yielding a 10.5% mean absolute percentage error (MAPE).
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制定了具有机器学习模拟(骆驼)项目的宇宙学和天体物理学,通过数千名宇宙的流体动力模拟和机器学习将宇宙学与天体物理学结合起来。骆驼包含4,233个宇宙学仿真,2,049个n-body和2,184个最先进的流体动力模拟,在参数空间中采样巨大的体积。在本文中,我们介绍了骆驼公共数据发布,描述了骆驼模拟的特性和由它们产生的各种数据产品,包括光环,次麦,银河系和空隙目录,功率谱,Bispectra,Lyman - $ \ Alpha $光谱,概率分布函数,光环径向轮廓和X射线光子列表。我们还释放了超过骆驼 - 山姆的数十亿个星系的目录:与Santa Cruz半分析模型相结合的大量N身体模拟。我们释放包含350多个Terabytes的所有数据,并包含143,922个快照,数百万光环,星系和摘要统计数据。我们提供有关如何访问,下载,读取和处理数据AT \ URL {https://camels.readthedocs.io}的进一步技术详细信息。
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超越地球轨道的人类空间勘探将涉及大量距离和持续时间的任务。为了有效减轻无数空间健康危害,数据和空间健康系统的范式转移是实现地球独立性的,而不是Earth-Reliance所必需的。有希望在生物学和健康的人工智能和机器学习领域的发展可以解决这些需求。我们提出了一个适当的自主和智能精密空间健康系统,可以监控,汇总和评估生物医学状态;分析和预测个性化不良健康结果;适应并响应新累积的数据;并提供对其船员医务人员的个人深度空间机组人员和迭代决策支持的预防性,可操作和及时的见解。在这里,我们介绍了美国国家航空航天局组织的研讨会的建议摘要,以便在太空生物学和健康中未来的人工智能应用。在未来十年,生物监测技术,生物标志科学,航天器硬件,智能软件和简化的数据管理必须成熟,并编织成精确的空间健康系统,以使人类在深空中茁壮成长。
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空间生物学研究旨在了解太空飞行对生物的根本影响,制定支持深度空间探索的基础知识,最终生物工程航天器和栖息地稳定植物,农作物,微生物,动物和人类的生态系统,为持续的多行星寿命稳定。要提高这些目标,该领域利用了来自星空和地下模拟研究的实验,平台,数据和模型生物。由于研究扩展到低地球轨道之外,实验和平台必须是最大自主,光,敏捷和智能化,以加快知识发现。在这里,我们介绍了由美国国家航空航天局的人工智能,机器学习和建模应用程序组织的研讨会的建议摘要,这些应用程序为这些空间生物学挑战提供了关键解决方案。在未来十年中,将人工智能融入太空生物学领域将深化天空效应的生物学理解,促进预测性建模和分析,支持最大自主和可重复的实验,并有效地管理星载数据和元数据,所有目标使生活能够在深空中茁壮成长。
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当前的量子点(QD)设备的自动传动方法在显示出一些成功的同时,缺乏对数据可靠性的评估。当自主系统处理嘈杂或低质量数据时,这会导致意外的失败。在这项工作中,我们为QD设备的强大自动调整提供了一个框架,该QD设备将机器学习(ML)状态分类器与数据质量控制模块结合在一起。数据质量控制模块充当“守门人”系统,确保只有国家分类器处理可靠的数据。较低的数据质量会导致设备重新校准或终止。为了训练两个ML系统,我们通过结合QD实验的典型合成噪声来增强QD仿真。我们确认,在状态分类器的训练中包含合成噪声可以显着提高性能,在测试实验数据时,准确性为95.0(9)%。然后,我们通过表明状态分类器的性能随着预期的数据质量而恶化,从而验证数据质量控制模块的功能。我们的结果为嘈杂的QD设备的自动调整建立了强大而灵活的ML框架。
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The recent increase in public and academic interest in preserving biodiversity has led to the growth of the field of conservation technology. This field involves designing and constructing tools that utilize technology to aid in the conservation of wildlife. In this article, we will use case studies to demonstrate the importance of designing conservation tools with human-wildlife interaction in mind and provide a framework for creating successful tools. These case studies include a range of complexities, from simple cat collars to machine learning and game theory methodologies. Our goal is to introduce and inform current and future researchers in the field of conservation technology and provide references for educating the next generation of conservation technologists. Conservation technology not only has the potential to benefit biodiversity but also has broader impacts on fields such as sustainability and environmental protection. By using innovative technologies to address conservation challenges, we can find more effective and efficient solutions to protect and preserve our planet's resources.
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We address the problem of extracting key steps from unlabeled procedural videos, motivated by the potential of Augmented Reality (AR) headsets to revolutionize job training and performance. We decompose the problem into two steps: representation learning and key steps extraction. We employ self-supervised representation learning via a training strategy that adapts off-the-shelf video features using a temporal module. Training implements self-supervised learning losses involving multiple cues such as appearance, motion and pose trajectories extracted from videos to learn generalizable representations. Our method extracts key steps via a tunable algorithm that clusters the representations extracted from procedural videos. We quantitatively evaluate our approach with key step localization and also demonstrate the effectiveness of the extracted representations on related downstream tasks like phase classification. Qualitative results demonstrate that the extracted key steps are meaningful to succinctly represent the procedural tasks.
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While the capabilities of autonomous systems have been steadily improving in recent years, these systems still struggle to rapidly explore previously unknown environments without the aid of GPS-assisted navigation. The DARPA Subterranean (SubT) Challenge aimed to fast track the development of autonomous exploration systems by evaluating their performance in real-world underground search-and-rescue scenarios. Subterranean environments present a plethora of challenges for robotic systems, such as limited communications, complex topology, visually-degraded sensing, and harsh terrain. The presented solution enables long-term autonomy with minimal human supervision by combining a powerful and independent single-agent autonomy stack, with higher level mission management operating over a flexible mesh network. The autonomy suite deployed on quadruped and wheeled robots was fully independent, freeing the human supervision to loosely supervise the mission and make high-impact strategic decisions. We also discuss lessons learned from fielding our system at the SubT Final Event, relating to vehicle versatility, system adaptability, and re-configurable communications.
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