这项工作探讨了物理驱动的机器学习技术运算符推理（IMIPF），以预测混乱的动力系统状态。 OPINF提供了一种非侵入性方法来推断缩小空间中多项式操作员的近似值，而无需访问离散模型中出现的完整订单操作员。物理系统的数据集是使用常规数值求解器生成的，然后通过主成分分析（PCA）投影到低维空间。在潜在空间中，设置了一个最小二乘问题以适合二次多项式操作员，该操作员随后在时间整合方案中使用，以便在同一空间中产生外推。解决后，将对逆PCA操作进行重建原始空间中的外推。通过标准化的根平方误差（NRMSE）度量评估了OPINF预测的质量，从中计算有效的预测时间（VPT）。考虑混乱系统Lorenz 96和Kuramoto-Sivashinsky方程的数值实验显示，具有VPT范围的OPINF降低订单模型的有希望的预测能力，这些模型均超过了最先进的机器学习方法，例如返回和储层计算循环新的Neural网络[1 ]，以及马尔可夫神经操作员[2]。

Creating compelling captions for data visualizations has been a longstanding challenge. Visualization researchers are typically untrained in journalistic reporting and hence the captions that are placed below data visualizations tend to be not overly engaging and rather just stick to basic observations about the data. In this work we explore the opportunities offered by the newly emerging crop of large language models (LLM) which use sophisticated deep learning technology to produce human-like prose. We ask, can these powerful software devices be purposed to produce engaging captions for generic data visualizations like a scatterplot. It turns out that the key challenge lies in designing the most effective prompt for the LLM, a task called prompt engineering. We report on first experiments using the popular LLM GPT-3 and deliver some promising results.

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.

We report on experiments for the fingerprint modality conducted during the First BioSecure Residential Workshop. Two reference systems for fingerprint verification have been tested together with two additional non-reference systems. These systems follow different approaches of fingerprint processing and are discussed in detail. Fusion experiments I volving different combinations of the available systems are presented. The experimental results show that the best recognition strategy involves both minutiae-based and correlation-based measurements. Regarding the fusion experiments, the best relative improvement is obtained when fusing systems that are based on heterogeneous strategies for feature extraction and/or matching. The best combinations of two/three/four systems always include the best individual systems whereas the best verification performance is obtained when combining all the available systems.

Artificial Intelligence (AI) is having a tremendous impact across most areas of science. Applications of AI in healthcare have the potential to improve our ability to detect, diagnose, prognose, and intervene on human disease. For AI models to be used clinically, they need to be made safe, reproducible and robust, and the underlying software framework must be aware of the particularities (e.g. geometry, physiology, physics) of medical data being processed. This work introduces MONAI, a freely available, community-supported, and consortium-led PyTorch-based framework for deep learning in healthcare. MONAI extends PyTorch to support medical data, with a particular focus on imaging, and provide purpose-specific AI model architectures, transformations and utilities that streamline the development and deployment of medical AI models. MONAI follows best practices for software-development, providing an easy-to-use, robust, well-documented, and well-tested software framework. MONAI preserves the simple, additive, and compositional approach of its underlying PyTorch libraries. MONAI is being used by and receiving contributions from research, clinical and industrial teams from around the world, who are pursuing applications spanning nearly every aspect of healthcare.

Chronic pain is a multi-dimensional experience, and pain intensity plays an important part, impacting the patients emotional balance, psychology, and behaviour. Standard self-reporting tools, such as the Visual Analogue Scale for pain, fail to capture this burden. Moreover, this type of tools is susceptible to a degree of subjectivity, dependent on the patients clear understanding of how to use it, social biases, and their ability to translate a complex experience to a scale. To overcome these and other self-reporting challenges, pain intensity estimation has been previously studied based on facial expressions, electroencephalograms, brain imaging, and autonomic features. However, to the best of our knowledge, it has never been attempted to base this estimation on the patient narratives of the personal experience of chronic pain, which is what we propose in this work. Indeed, in the clinical assessment and management of chronic pain, verbal communication is essential to convey information to physicians that would otherwise not be easily accessible through standard reporting tools, since language, sociocultural, and psychosocial variables are intertwined. We show that language features from patient narratives indeed convey information relevant for pain intensity estimation, and that our computational models can take advantage of that. Specifically, our results show that patients with mild pain focus more on the use of verbs, whilst moderate and severe pain patients focus on adverbs, and nouns and adjectives, respectively, and that these differences allow for the distinction between these three pain classes.

在许多现实世界和高影响力决策设置中，从分类过程中说明预测性不确定性的神经网络的概率预测至关重要。但是，实际上，大多数数据集经过非稳定神经网络的培训，默认情况下，这些神经网络不会捕获这种固有的不确定性。这个众所周知的问题导致了事后校准程序的开发，例如PLATT缩放（Logistic），等渗和β校准，这将得分转化为校准良好的经验概率。校准方法的合理替代方法是使用贝叶斯神经网络，该网络直接建模预测分布。尽管它们已应用于图像和文本数据集，但在表格和小型数据制度中的采用有限。在本文中，我们证明了与校准神经网络相比，贝叶斯神经网络在各种数据集中进行实验，从而产生竞争性能。

在汽车行业中，标记数据的匮乏是典型的挑战。注释的时间序列测量需要固体域知识和深入的探索性数据分析，这意味着高标签工作。传统的主动学习（AL）通过根据估计的分类概率积极查询最有用的实例来解决此问题，并在迭代中重新审视该模型。但是，学习效率强烈依赖于初始模型，从而导致初始数据集和查询编号的大小之间的权衡。本文提出了一个新颖的几杆学习（FSL）基于AL框架，该框架通过将原型网络（Protonet）纳入AL迭代来解决权衡问题。一方面，结果表明了对初始模型的鲁棒性，另一方面，通过在每种迭代中的支持设置的主动选择方面的学习效率。该框架已在UCI HAR/HAPT数据集​​和现实世界制动操纵数据集上进行了验证。学习绩效在两个数据集上都显着超过了传统的AL算法，分别以10％和5％的标签工作实现了90％的分类精度。

非平稳来源分离是具有许多不同方法的盲源分离的一个完善的分支。但是，对于这些方法都没有大样本结果可用。为了弥合这一差距，我们开发了NSS-JD的大样本理论，NSS-JD是一种基于块构成协方差矩阵的联合对角线化的非平稳源分离方法。我们在独立高斯非平稳源信号的瞬时线性混合模型以及一组非常通用的假设下工作：除了有界条件外，我们做出的唯一假设是，源表现出有限的依赖性，其方差函数足够差异，足以差异为渐近可分离。在以前的条件下显示，未混合估计器及其在标准平方根速率下的限制高斯分布的一致性显示。模拟实验用于验证理论结果并研究块长度对分离的影响。

Visual Place识别（VPR）是机器人平台从其车载摄像机中正确解释视觉刺激的能力，以确定其当前是否位于先前访问的位置，尽管有不同的视点，照明和外观变化。 JPEG是一种广泛使用的图像压缩标准，能够以图像清晰度为代价显着降低图像的大小。对于同时部署多个机器人平台的应用程序，必须在每个机器人之间远程传输收集的视觉数据。因此，可以采用JPEG压缩来大大减少通信渠道传输的数据量，因为可以证明使用有限的带宽为有限的带宽是一项具有挑战性的任务。然而，以前尚未研究JPEG压缩对当前VPR技术性能的影响。因此，本文对与VPR相关方案中的JPEG压缩进行了深入研究。我们在8个数据集上使用一系列已建立的VPR技术，并应用了各种压缩。我们表明，通过引入压缩，VPR性能大大降低，尤其是在较高的压缩频谱中。为了克服JPEG压缩对VPR性能的负面影响，我们提出了一个微调的CNN，该CNN针对JPEG压缩数据进行了优化，并表明其在极度压缩的JPEG图像中检测到的图像转换更加一致。