In recent years, there has been a surge of interest in research on automatic mental health detection (MHD) from social media data leveraging advances in natural language processing and machine learning techniques. While significant progress has been achieved in this interdisciplinary research area, the vast majority of work has treated MHD as a binary classification task. The multiclass classification setup is, however, essential if we are to uncover the subtle differences among the statistical patterns of language use associated with particular mental health conditions. Here, we report on experiments aimed at predicting six conditions (anxiety, attention deficit hyperactivity disorder, bipolar disorder, post-traumatic stress disorder, depression, and psychological stress) from Reddit social media posts. We explore and compare the performance of hybrid and ensemble models leveraging transformer-based architectures (BERT and RoBERTa) and BiLSTM neural networks trained on within-text distributions of a diverse set of linguistic features. This set encompasses measures of syntactic complexity, lexical sophistication and diversity, readability, and register-specific ngram frequencies, as well as sentiment and emotion lexicons. In addition, we conduct feature ablation experiments to investigate which types of features are most indicative of particular mental health conditions.

In recent years, there has been increased interest in building predictive models that harness natural language processing and machine learning techniques to detect emotions from various text sources, including social media posts, micro-blogs or news articles. Yet, deployment of such models in real-world sentiment and emotion applications faces challenges, in particular poor out-of-domain generalizability. This is likely due to domain-specific differences (e.g., topics, communicative goals, and annotation schemes) that make transfer between different models of emotion recognition difficult. In this work we propose approaches for text-based emotion detection that leverage transformer models (BERT and RoBERTa) in combination with Bidirectional Long Short-Term Memory (BiLSTM) networks trained on a comprehensive set of psycholinguistic features. First, we evaluate the performance of our models within-domain on two benchmark datasets: GoEmotion and ISEAR. Second, we conduct transfer learning experiments on six datasets from the Unified Emotion Dataset to evaluate their out-of-domain robustness. We find that the proposed hybrid models improve the ability to generalize to out-of-distribution data compared to a standard transformer-based approach. Moreover, we observe that these models perform competitively on in-domain data.

其中一个关键的交际能力是能够维持单声道言论的流利程度以及产生复杂语言的能力，以令人信服地争论一个立场。在本文中，我们的目标是预测由110名个人7小时的演讲组成的争论演讲的众群数据集中的TED谈话风格的情感评级。通过与三个辩论主题有关的任务提示引发语音样本。该样本总共有2211名来自737名有关的人类评估者，其有关的14个情感类别。我们通过微调预先调整在TED谈判公开演讲的大型数据集上进行了微调的模型来提出有效的方法来预测这些类别的分类任务。我们使用从最先进的自动语音识别系统中获得的流利功能的组合和从自动文本分析系统获得的大量人类解释的语言特征。所有14家评级类别的分类准确度大于60％，评分类别“信息性”的峰值性能为72％。在二次实验中，我们确定了使用SP-in-in-infly群体的特征的相对重要性。

我们提出了一个新的灵敏度分析模型，该模型结合了Copulas和在未观察到的混杂状态下的因果推断的标准化。我们将新模型称为$ \ rho $ -gnf（$ \ rho $ - graphical正常化流），其中$ \ rho {\ in} [ - 1，+1] $是一个有界灵敏度参数，表示后门非 - 由于未观察到的混杂而引起的因果关系，使用研究最丰富且广泛流行的高斯副群建模。具体而言，$ \ rho $ -gnf使我们能够估计和分析前门因果效应或平均因果效应（ACE）作为$ \ rho $的函数。我们将其称为$ \ rho_ {curve} $。 $ \ rho_ {curve} $使我们能够指定无王牌所需的混杂力量。我们将其称为$ \ rho_ {value} $。此外，$ \ rho_ {curve} $还使我们能够为$ \ rho $ values的间隔提供ACE的界限。我们说明了$ \ rho $ -gnf的好处，并通过对我们的经验王牌界限的实验比其他流行的王牌范围更狭窄。

关于自适应梯度方法等自适应梯度方法等训练动力的知之甚少。在本文中，我们阐明了这些算法在全批处理和足够大的批处理设置中的行为。具体而言，我们从经验上证明，在全批训练中，预处理的Hessian的最大特征值通常在某个数值下平衡 - 梯度下降算法的稳定性阈值。对于带有步长$ \ eta $和$ \ beta_1 = 0.9 $的Adam，此稳定性阈值为$ 38/\ eta $。在Minibatch培训期间发生了类似的影响，尤其是随着批处理大小的增长。然而，即使自适应方法在``稳定性的自适应边缘''（AEOS）上训练，但它们在该制度中的行为与EOS的非自适应方法的行为有很大不同。 EOS处的非自适应算法被阻止进入损失景观的高曲率区域，而AEOS的自适应梯度方法可以继续前进到高外观区域，同时适应预先调节器以补偿。我们的发现可以成为社区对深度学习中适应性梯度方法的未来理解的基础。

近年来，基于属性的访问控制（ABAC）已经变得非常受欢迎，有效地在动态和协作环境中强制访问访问控制。 ABAC的实现需要创建一组基于属性的规则，累积地形成策略。设计ABAC策略AB INITIO要求从系统管理员提供大量的努力。此外，组织变革可能需要在已经部署的政策中列入新规则。在这种情况下，重新开采整个ABAC政策需要相当大的时间和行政努力。相反，最好逐步增加政策。在本文中，保持这些方面可以减少行政开销，在本文中，我们提出了使用机器学习的策略管理方法来帮助系统管理员创建新的ABAC政策以及增强现有的帕克拉。 Pammela可以通过学习目前在类似组织中强制执行的政策规则来为组织产生新的政策。对于政策增强，Pammela可以根据现有规则收集的知识推断出新规则。实验结果表明，我们所提出的方法在各种机器学习评估度量和执行时间方面提供了合理良好的性能。

Camera and lidar are important sensor modalities for robotics in general and self-driving cars in particular. The sensors provide complementary information offering an opportunity for tight sensor-fusion. Surprisingly, lidar-only methods outperform fusion methods on the main benchmark datasets, suggesting a gap in the literature. In this work, we propose PointPainting: a sequential fusion method to fill this gap. PointPainting works by projecting lidar points into the output of an image-only semantic segmentation network and appending the class scores to each point. The appended (painted) point cloud can then be fed to any lidaronly method. Experiments show large improvements on three different state-of-the art methods, Point-RCNN, Vox-elNet and PointPillars on the KITTI and nuScenes datasets. The painted version of PointRCNN represents a new state of the art on the KITTI leaderboard for the bird's-eye view detection task. In ablation, we study how the effects of Painting depends on the quality and format of the semantic segmentation output, and demonstrate how latency can be minimized through pipelining.

疟疾是一种威胁生命的疾病，影响了数百万。基于显微镜的薄膜评估是（i）确定疟疾物种和（ii）定量高寄生虫感染的标准方法。通过机器学习（ML）对疟疾显微镜的完全自动化是一项具有挑战性的任务，因为预先准备的滑动在质量和表现方面差异很大，并且伪像通常超过相对较少的寄生虫。在这项工作中，我们描述了一个用于薄膜疟疾分析的完整，完全自动化的框架，该框架应用了ML方法，包括卷积神经网（CNN），该方法在大型且多样化的田间预先准备的薄膜数据集中进行了训练。定量和物种鉴定结果几乎足够准确地满足了耐药性监测和临床用例的混凝土需求。我们将方法和性能指标集中在现场用例要求上。我们讨论了将ML方法应用于疟疾显微镜的关键问题和重要指标。

Robust detection and tracking of objects is crucial for the deployment of autonomous vehicle technology. Image based benchmark datasets have driven development in computer vision tasks such as object detection, tracking and segmentation of agents in the environment. Most autonomous vehicles, however, carry a combination of cameras and range sensors such as lidar and radar. As machine learning based methods for detection and tracking become more prevalent, there is a need to train and evaluate such methods on datasets containing range sensor data along with images. In this work we present nuTonomy scenes (nuScenes), the first dataset to carry the full autonomous vehicle sensor suite: 6 cameras, 5 radars and 1 lidar, all with full 360 degree field of view. nuScenes comprises 1000 scenes, each 20s long and fully annotated with 3D bounding boxes for 23 classes and 8 attributes. It has 7x as many annotations and 100x as many images as the pioneering KITTI dataset. We define novel 3D detection and tracking metrics. We also provide careful dataset analysis as well as baselines for lidar and image based detection and tracking. Data, development kit and more information are available online 1 .

Object detection in point clouds is an important aspect of many robotics applications such as autonomous driving. In this paper we consider the problem of encoding a point cloud into a format appropriate for a downstream detection pipeline. Recent literature suggests two types of encoders; fixed encoders tend to be fast but sacrifice accuracy, while encoders that are learned from data are more accurate, but slower. In this work we propose PointPillars, a novel encoder which utilizes PointNets to learn a representation of point clouds organized in vertical columns (pillars). While the encoded features can be used with any standard 2D convolutional detection architecture, we further propose a lean downstream network. Extensive experimentation shows that PointPillars outperforms previous encoders with respect to both speed and accuracy by a large margin. Despite only using lidar, our full detection pipeline significantly outperforms the state of the art, even among fusion methods, with respect to both the 3D and bird's eye view KITTI benchmarks. This detection performance is achieved while running at 62 Hz: a 2 -4 fold runtime improvement. A faster version of our method matches the state of the art at 105 Hz. These benchmarks suggest that PointPillars is an appropriate encoding for object detection in point clouds.