尽管政府的信息运动和谁努力，但Covid-19疫苗犹豫不决是广泛的。其背后的原因之一是疫苗虚假信息在社交媒体中广泛传播。特别是，最近的调查确定，疫苗的虚假信息正在影响COVID-19-19疫苗接种的负面信任。同时，由于大规模的社交媒体，事实检查者正在努力检测和跟踪疫苗虚假信息。为了帮助事实检查员在线监视疫苗叙事，本文研究了一项新的疫苗叙事分类任务，该任务将Covid-19疫苗主张的疫苗索赔分为七个类别之一。遵循数据增强方法，我们首先为这项新的分类任务构建了一个新颖的数据集，重点是少数群体。我们还利用事实检查器注释的数据。该论文还提出了神经疫苗叙事分类器，在交叉验证下达到84％的精度。分类器可公开用于研究人员和记者。

本文介绍了Semeval-2022任务8：多语言新闻文章相似性的第二位系统。我们提出了一个富含实体的暹罗变形金刚，该变压器计算新闻文章的相似性，例如不同的子维度，例如新闻文章中讨论的事件的共享叙述，实体，位置和时间。我们的系统使用变压器编码器利用暹罗网络体系结构来学习文档级表示，以便捕获叙事以及从新闻文章中提取的基于辅助实体的功能。将所有这些功能一起使用背后的直觉是捕获不同粒度层面的新闻文章之间的相似性，并评估不同新闻媒体对“相同事件”的文章的程度。我们的实验结果和详细的消融研究证明了我们提出的方法的有效性和有效性。

There are multiple scales of abstraction from which we can describe the same image, depending on whether we are focusing on fine-grained details or a more global attribute of the image. In brain mapping, learning to automatically parse images to build representations of both small-scale features (e.g., the presence of cells or blood vessels) and global properties of an image (e.g., which brain region the image comes from) is a crucial and open challenge. However, most existing datasets and benchmarks for neuroanatomy consider only a single downstream task at a time. To bridge this gap, we introduce a new dataset, annotations, and multiple downstream tasks that provide diverse ways to readout information about brain structure and architecture from the same image. Our multi-task neuroimaging benchmark (MTNeuro) is built on volumetric, micrometer-resolution X-ray microtomography images spanning a large thalamocortical section of mouse brain, encompassing multiple cortical and subcortical regions. We generated a number of different prediction challenges and evaluated several supervised and self-supervised models for brain-region prediction and pixel-level semantic segmentation of microstructures. Our experiments not only highlight the rich heterogeneity of this dataset, but also provide insights into how self-supervised approaches can be used to learn representations that capture multiple attributes of a single image and perform well on a variety of downstream tasks. Datasets, code, and pre-trained baseline models are provided at: https://mtneuro.github.io/ .

Artificial Intelligence (AI) has become commonplace to solve routine everyday tasks. Because of the exponential growth in medical imaging data volume and complexity, the workload on radiologists is steadily increasing. We project that the gap between the number of imaging exams and the number of expert radiologist readers required to cover this increase will continue to expand, consequently introducing a demand for AI-based tools that improve the efficiency with which radiologists can comfortably interpret these exams. AI has been shown to improve efficiency in medical-image generation, processing, and interpretation, and a variety of such AI models have been developed across research labs worldwide. However, very few of these, if any, find their way into routine clinical use, a discrepancy that reflects the divide between AI research and successful AI translation. To address the barrier to clinical deployment, we have formed MONAI Consortium, an open-source community which is building standards for AI deployment in healthcare institutions, and developing tools and infrastructure to facilitate their implementation. This report represents several years of weekly discussions and hands-on problem solving experience by groups of industry experts and clinicians in the MONAI Consortium. We identify barriers between AI-model development in research labs and subsequent clinical deployment and propose solutions. Our report provides guidance on processes which take an imaging AI model from development to clinical implementation in a healthcare institution. We discuss various AI integration points in a clinical Radiology workflow. We also present a taxonomy of Radiology AI use-cases. Through this report, we intend to educate the stakeholders in healthcare and AI (AI researchers, radiologists, imaging informaticists, and regulators) about cross-disciplinary challenges and possible solutions.

By transferring knowledge from large, diverse, task-agnostic datasets, modern machine learning models can solve specific downstream tasks either zero-shot or with small task-specific datasets to a high level of performance. While this capability has been demonstrated in other fields such as computer vision, natural language processing or speech recognition, it remains to be shown in robotics, where the generalization capabilities of the models are particularly critical due to the difficulty of collecting real-world robotic data. We argue that one of the keys to the success of such general robotic models lies with open-ended task-agnostic training, combined with high-capacity architectures that can absorb all of the diverse, robotic data. In this paper, we present a model class, dubbed Robotics Transformer, that exhibits promising scalable model properties. We verify our conclusions in a study of different model classes and their ability to generalize as a function of the data size, model size, and data diversity based on a large-scale data collection on real robots performing real-world tasks. The project's website and videos can be found at robotics-transformer.github.io

Digital Twin is an emerging technology that replicates real-world entities into a digital space. It has attracted increasing attention in the transportation field and many researchers are exploring its future applications in the development of Intelligent Transportation System (ITS) technologies. Connected vehicles (CVs) and pedestrians are among the major traffic participants in ITS. However, the usage of Digital Twin in research involving both CV and pedestrian remains largely unexplored. In this study, a Digital Twin framework for CV and pedestrian in-the-loop simulation is proposed. The proposed framework consists of the physical world, the digital world, and data transmission in between. The features for the entities (CV and pedestrian) that need digital twined are divided into external state and internal state, and the attributes in each state are described. We also demonstrate a sample architecture under the proposed Digital Twin framework, which is based on Carla-Sumo Co-simulation and Cave automatic virtual environment (CAVE). The proposed framework is expected to provide guidance to the future Digital Twin research, and the architecture we build can serve as the testbed for further research and development of ITS applications on CV and pedestrian.

Object-goal navigation (Object-nav) entails searching, recognizing and navigating to a target object. Object-nav has been extensively studied by the Embodied-AI community, but most solutions are often restricted to considering static objects (e.g., television, fridge, etc.). We propose a modular framework for object-nav that is able to efficiently search indoor environments for not just static objects but also movable objects (e.g. fruits, glasses, phones, etc.) that frequently change their positions due to human intervention. Our contextual-bandit agent efficiently explores the environment by showing optimism in the face of uncertainty and learns a model of the likelihood of spotting different objects from each navigable location. The likelihoods are used as rewards in a weighted minimum latency solver to deduce a trajectory for the robot. We evaluate our algorithms in two simulated environments and a real-world setting, to demonstrate high sample efficiency and reliability.

尽管进行了数十年的研究，但现有的导航系统在野外部署时仍然面临现实世界中的挑战，例如在混乱的家庭环境或人类占领的公共场所中。为了解决这个问题，我们提出了一类新的隐式控制政策，将模仿学习的好处与模型预测控制（MPC）的系统约束的强大处理结合在一起。我们的方法称为Performer-MPC，使用了通过表演者提供的视觉上下文嵌入的学习成本函数（一种低级隐式意见变压器）。我们共同训练成本函数并构建依靠它的控制器，有效地端到端解决相应的双层优化问题。我们表明，由此产生的策略通过利用一些在不同挑战的现实世界情景中利用一些专家演示来提高标准MPC绩效。与标准的MPC政策相比，表演者MPC在混乱的环境中实现了40％的目标，而在人类浏览时，社交指标的目标> 65％。

在过去的十年中，许多组织制作了旨在从规范意义上进行标准化的文件，并为我们最近和快速的AI开发促进指导。但是，除了一些荟萃分析和该领域的批判性评论外，尚未分析这些文档中提出的思想的全部内容和分歧。在这项工作中，我们试图扩展过去研究人员所做的工作，并创建一种工具，以更好地数据可视化这些文档的内容和性质。我们还提供了通过将工具应用于200个文档的样本量获得的结果的批判性分析。

自然行为由不可预测的动力学组成，可以突然切换并在许多不同的时间尺度上展开。尽管在受约束或简化的基于任务的条件下构建行为的表示方面已经找到了一些成功，但由于它们假设单一的时间动力学规模，因此无法将其中许多模型应用于自由和自然主义的设置。在这项工作中，我们跨多个尺度（BAMS）引入引导程序，这是一种多尺度表示模型：我们结合了一个汇总模块，该模块汇总了与具有不同时间接收场的编码器上提取的特征，并设计了一组潜在目标，以进行引导程序各个空间中的表示，以鼓励不同时间尺度的分离。我们首先将我们的方法应用于在不同地形类型中导航的四倍的数据集上，并表明我们的模型捕获了行为的时间复杂性。然后，我们将我们的方法应用于MABE 2022多代理行为挑战，我们的模型在两个子任务中排名第三，第一个排名第1，并在分析行为时显示了合并多时间尺度的重要性。