串联连接的机器人是希望在大规模灾害中的搜索和救援等限制空间中执行任务的候选人。这种机器人通常是韧带,我们假设肢体的添加可以改善移动性。然而,在设计和控制这种装置方面的挑战在于以提高移动性的方式协调高维冗余模块。在这里,我们开发了一个控制串联连接的多腿机器人的一般框架。具体地,我们结合了两种方法来构建一般的形状控制方案,其可以为各种机器人形态的有效运动提供自变形(“Gaits”)的基线模式。首先,我们从维度降低和生物步态分类方案中获取灵感,以产生身体变形和脚提升/降低的循环模式,其促进了任意基板接触图案的产生。其次,我们使用几何力学方法来促进识别这些起伏的最佳相位,以最大化速度和/或稳定性。我们的方案允许在扁平摩擦地形上的多腿机器人机车上的有效Gaits开发有多种数量的四肢(4,6,16,甚至0四肢)和身体致动能力(包括在Limbless设备上的侧壁Gaits)。通过适当协调身体波动和腿部放置,我们的框架结合了Limbless机器人(模块化)和腿机器人(移动性)的优势。我们预计我们的框架可以提供一般的控制方案,以便快速部署一般的多腿机器人,铺平往达在现实条件下遍历复杂环境的机器的方式。
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The NASA Astrophysics Data System (ADS) is an essential tool for researchers that allows them to explore the astronomy and astrophysics scientific literature, but it has yet to exploit recent advances in natural language processing. At ADASS 2021, we introduced astroBERT, a machine learning language model tailored to the text used in astronomy papers in ADS. In this work we: - announce the first public release of the astroBERT language model; - show how astroBERT improves over existing public language models on astrophysics specific tasks; - and detail how ADS plans to harness the unique structure of scientific papers, the citation graph and citation context, to further improve astroBERT.
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Large language models (LLMs) have been shown to be able to perform new tasks based on a few demonstrations or natural language instructions. While these capabilities have led to widespread adoption, most LLMs are developed by resource-rich organizations and are frequently kept from the public. As a step towards democratizing this powerful technology, we present BLOOM, a 176B-parameter open-access language model designed and built thanks to a collaboration of hundreds of researchers. BLOOM is a decoder-only Transformer language model that was trained on the ROOTS corpus, a dataset comprising hundreds of sources in 46 natural and 13 programming languages (59 in total). We find that BLOOM achieves competitive performance on a wide variety of benchmarks, with stronger results after undergoing multitask prompted finetuning. To facilitate future research and applications using LLMs, we publicly release our models and code under the Responsible AI License.
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语言模型既展示了定量的改进,又展示了新的定性功能,随着规模的增加。尽管它们具有潜在的变革性影响,但这些新能力的特征却很差。为了为未来的研究提供信息,为破坏性的新模型能力做准备,并改善社会有害的效果,至关重要的是,我们必须了解目前和近乎未来的能力和语言模型的局限性。为了应对这一挑战,我们介绍了超越模仿游戏基准(Big Bench)。 Big Bench目前由204个任务组成,由132家机构的442位作者贡献。任务主题是多样的,从语言学,儿童发展,数学,常识性推理,生物学,物理学,社会偏见,软件开发等等。 Big-Bench专注于被认为超出当前语言模型的功能的任务。我们评估了OpenAI的GPT型号,Google内部密集变压器体系结构和大型基础上的开关稀疏变压器的行为,跨越了数百万到数十亿个参数。此外,一个人类专家评估者团队执行了所有任务,以提供强大的基准。研究结果包括:模型性能和校准都随规模改善,但绝对的术语(以及与评估者的性能相比);在模型类中的性能非常相似,尽管带有稀疏性。逐渐和预测的任务通常涉及大量知识或记忆成分,而在临界规模上表现出“突破性”行为的任务通常涉及多个步骤或组成部分或脆性指标;社交偏见通常会随着含糊不清的环境而随着规模而增加,但这可以通过提示来改善。
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通用形态(UNIMORPH)项目是一项合作的努力,可为数百种世界语言实例化覆盖范围的标准化形态拐角。该项目包括两个主要的推力:一种无独立的特征架构,用于丰富的形态注释,并以各种语言意识到该模式的各种语言的带注释数据的类型级别资源。本文介绍了过去几年对几个方面的扩张和改进(自McCarthy等人(2020年)以来)。众多语言学家的合作努力增加了67种新语言,其中包括30种濒危语言。我们已经对提取管道进行了一些改进,以解决一些问题,例如缺少性别和马克龙信息。我们还修改了模式,使用了形态学现象所需的层次结构,例如多肢体协议和案例堆叠,同时添加了一些缺失的形态特征,以使模式更具包容性。鉴于上一个UniMorph版本,我们还通过16种语言的词素分割增强了数据库。最后,这个新版本通过通过代表来自metphynet的派生过程的实例丰富数据和注释模式来推动将衍生物形态纳入UniMorph中。
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3D光学相干断层扫描图像中视网膜流体的准确分割是诊断和个性化眼部疾病的关键。尽管深度学习在这项任务上取得了成功,但受过训练的监督模型通常会因不像标记示例的图像而失败,例如对于使用不同设备获取的图像。我们在此提出了一个新型的半监督学习框架,用于从新未标记的域分割体积图像。我们共同使用受监督和对比度学习,还引入了一种对比配对方案,该方案利用3D中附近切片之间的相似性。此外,我们建议通过渠道聚合作为对比特征图投影的常规空间释放聚合的替代方法。我们评估了从(标记的)源域对(未标记的)目标域的域适应方法,每个方法都包含具有不同采集设备的图像。在目标域中,我们的方法获得了比SIMCLR(最先进的对比框架)高13.8%的骰子系数,并导致结果可与该领域中有监督的训练的上限相当。在源域中,我们的模型还通过成功利用来自许多未标记的图像的信息,将结果提高了5.4%。
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最近的深层摄影的出现使操纵和生成的内容成为机器学习研究的最前沿。自动检测深击已经看到了许多新的机器学习技术,但是,人类的检测功能的探索功能要少得多。在本文中,我们介绍了比较人类和机器检测用于模仿某人声音的音频深击的能力的结果。为此,我们使用基于Web的应用程序框架作为游戏。要求参与者区分真实和假音频样本。在我们的实验中,有378位唯一用户与最先进的AI DeepFake检测算法竞争,以12540的比赛总数。我们发现,人类和深层检测算法具有相似的优势和劣势,都在努力检测某些类型的攻击。这与许多应用领域(例如对象检测或面部识别)中AI的超人性能形成对比。关于人类的成功因素,我们发现IT专业人员没有非专业人士的优势,但母语人士比非本地人的人具有优势。此外,我们发现年长的参与者往往比年轻的参与者更容易受到影响。在为人类设计未来的网络安全培训以及开发更好的检测算法时,这些见解可能会有所帮助。
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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 present the interpretable meta neural ordinary differential equation (iMODE) method to rapidly learn generalizable (i.e., not parameter-specific) dynamics from trajectories of multiple dynamical systems that vary in their physical parameters. The iMODE method learns meta-knowledge, the functional variations of the force field of dynamical system instances without knowing the physical parameters, by adopting a bi-level optimization framework: an outer level capturing the common force field form among studied dynamical system instances and an inner level adapting to individual system instances. A priori physical knowledge can be conveniently embedded in the neural network architecture as inductive bias, such as conservative force field and Euclidean symmetry. With the learned meta-knowledge, iMODE can model an unseen system within seconds, and inversely reveal knowledge on the physical parameters of a system, or as a Neural Gauge to "measure" the physical parameters of an unseen system with observed trajectories. We test the validity of the iMODE method on bistable, double pendulum, Van der Pol, Slinky, and reaction-diffusion systems.
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While the brain connectivity network can inform the understanding and diagnosis of developmental dyslexia, its cause-effect relationships have not yet enough been examined. Employing electroencephalography signals and band-limited white noise stimulus at 4.8 Hz (prosodic-syllabic frequency), we measure the phase Granger causalities among channels to identify differences between dyslexic learners and controls, thereby proposing a method to calculate directional connectivity. As causal relationships run in both directions, we explore three scenarios, namely channels' activity as sources, as sinks, and in total. Our proposed method can be used for both classification and exploratory analysis. In all scenarios, we find confirmation of the established right-lateralized Theta sampling network anomaly, in line with the temporal sampling framework's assumption of oscillatory differences in the Theta and Gamma bands. Further, we show that this anomaly primarily occurs in the causal relationships of channels acting as sinks, where it is significantly more pronounced than when only total activity is observed. In the sink scenario, our classifier obtains 0.84 and 0.88 accuracy and 0.87 and 0.93 AUC for the Theta and Gamma bands, respectively.
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