大脑提取是预处理3D脑MRI数据的第一步之一。它是任何即将进行的大脑成像分析的先决条件。但是，由于大脑和人头的复杂结构，这并不是一个简单的分割问题。尽管文献中已经提出了多种解决方案，但我们仍然没有真正强大的方法。尽管以前的方法已将机器学习与结构/几何先验使用，但随着计算机视觉任务中深度学习的发展，对于此语义分割任务，建议的卷积神经网络体系结构有所增加。但是，大多数模型都致力于改善培训数据和损失功能，而架构的变化很小。在本文中，我们提出了一种称为EVC-NET的新颖架构。 EVC-NET在每个编码器块上添加了较低的比例输入。这增强了V-NET体系结构的多尺度方案，从而提高了模型的效率。有条件的随机字段，是深度学习时代之前的图像分割的一种流行方法，在这里重新引入，作为完善网络输出以捕获细分粒度结果的额外步骤。我们将我们的模型与HD-BET，Synthstrip和Brainy等最新方法进行比较。结果表明，即使训练资源有限，EVC-NET也可以达到更高的骰子系数和Jaccard指数以及较低的表面距离。

Research has shown that climate change creates warmer temperatures and drier conditions, leading to longer wildfire seasons and increased wildfire risks in the United States. These factors have in turn led to increases in the frequency, extent, and severity of wildfires in recent years. Given the danger posed by wildland fires to people, property, wildlife, and the environment, there is an urgency to provide tools for effective wildfire management. Early detection of wildfires is essential to minimizing potentially catastrophic destruction. In this paper, we present our work on integrating multiple data sources in SmokeyNet, a deep learning model using spatio-temporal information to detect smoke from wildland fires. Camera image data is integrated with weather sensor measurements and processed by SmokeyNet to create a multimodal wildland fire smoke detection system. We present our results comparing performance in terms of both accuracy and time-to-detection for multimodal data vs. a single data source. With a time-to-detection of only a few minutes, SmokeyNet can serve as an automated early notification system, providing a useful tool in the fight against destructive wildfires.

Nostradamus, inspired by the French astrologer and reputed seer, is a detailed study exploring relations between environmental factors and changes in the stock market. In this paper, we analyze associative correlation and causation between environmental elements and stock prices based on the US financial market, global climate trends, and daily weather records to demonstrate significant relationships between climate and stock price fluctuation. Our analysis covers short and long-term rises and dips in company stock performances. Lastly, we take four natural disasters as a case study to observe their effect on the emotional state of people and their influence on the stock market.

We propose a method for in-hand 3D scanning of an unknown object from a sequence of color images. We cast the problem as reconstructing the object surface from un-posed multi-view images and rely on a neural implicit surface representation that captures both the geometry and the appearance of the object. By contrast with most NeRF-based methods, we do not assume that the camera-object relative poses are known and instead simultaneously optimize both the object shape and the pose trajectory. As global optimization over all the shape and pose parameters is prone to fail without coarse-level initialization of the poses, we propose an incremental approach which starts by splitting the sequence into carefully selected overlapping segments within which the optimization is likely to succeed. We incrementally reconstruct the object shape and track the object poses independently within each segment, and later merge all the segments by aligning poses estimated at the overlapping frames. Finally, we perform a global optimization over all the aligned segments to achieve full reconstruction. We experimentally show that the proposed method is able to reconstruct the shape and color of both textured and challenging texture-less objects, outperforms classical methods that rely only on appearance features, and its performance is close to recent methods that assume known camera poses.

Manual prescription of the field of view (FOV) by MRI technologists is variable and prolongs the scanning process. Often, the FOV is too large or crops critical anatomy. We propose a deep-learning framework, trained by radiologists' supervision, for automating FOV prescription. An intra-stack shared feature extraction network and an attention network are used to process a stack of 2D image inputs to generate output scalars defining the location of a rectangular region of interest (ROI). The attention mechanism is used to make the model focus on the small number of informative slices in a stack. Then the smallest FOV that makes the neural network predicted ROI free of aliasing is calculated by an algebraic operation derived from MR sampling theory. We retrospectively collected 595 cases between February 2018 and February 2022. The framework's performance is examined quantitatively with intersection over union (IoU) and pixel error on position, and qualitatively with a reader study. We use the t-test for comparing quantitative results from all models and a radiologist. The proposed model achieves an average IoU of 0.867 and average ROI position error of 9.06 out of 512 pixels on 80 test cases, significantly better (P<0.05) than two baseline models and not significantly different from a radiologist (P>0.12). Finally, the FOV given by the proposed framework achieves an acceptance rate of 92% from an experienced radiologist.

我们提出了一种基于神经辐射场（NERF）的单个$ 360^\ PANORAMA图像合成新视图的方法。在类似环境中的先前研究依赖于多层感知的邻居插值能力来完成由遮挡引起的丢失区域，这导致其预测中的伪像。我们提出了360Fusionnerf，这是一个半监督的学习框架，我们介绍几何监督和语义一致性，以指导渐进式培训过程。首先，将输入图像重新投影至$ 360^\ Circ $图像，并在其他相机位置提取辅助深度图。除NERF颜色指导外，深度监督还改善了合成视图的几何形状。此外，我们引入了语义一致性损失，鼓励新观点的现实渲染。我们使用预先训练的视觉编码器（例如剪辑）提取这些语义功能，这是一个视觉变压器，经过数以千计的不同2D照片，并通过自然语言监督从网络中挖掘出来。实验表明，我们提出的方法可以在保留场景的特征的同时产生未观察到的区域的合理完成。 360fusionnerf在各种场景中接受培训时，转移到合成结构3D数据集（PSNR〜5％，SSIM〜3％lpips〜13％）时，始终达到最先进的性能，SSIM〜3％LPIPS〜9％）和replica360数据集（PSNR〜8％，SSIM〜2％LPIPS〜18％）。

与许多返回点值估计值的城市本地化方法不同，设定值表示可以通过确保可能的位置的连续体遵守安全限制来实现鲁棒性。具有设置值估计的一种策略是基于GNSS的阴影匹配〜（SM），其中使用三维（3-D）地图来计算GNSS阴影（在视线范围内被阻止）。但是，SM需要一个值值的网格才能计算障碍，并且精确限制了网格分辨率。我们建议针对Set值3-D MAPAID ADED GNSS本地化的Zonotope Shadow匹配（ZSM）。 ZSM代表建筑物和GNSS阴影，使用约束的ZONOTOPE，这是一种凸多属表示，该表示可以使用快速矢量串联操作实现传播设置值估计。 ZSM从粗糙的设定值开始，根据接收到的载体到噪声密度所判断的接收器在每个阴影内部或外部的接收器。我们使用模拟实验在简单的3-D示例图和旧金山密集的3-D地图上展示了算法的性能。

在存在对抗数据攻击的情况下，我们研究在线和分布式方案中的强大平均估计。在每个时间步骤中，网络中的每个代理都会收到一个潜在损坏的数据点，其中数据点最初是独立的，并且是随机变量的相同分布的样本。我们建议所有代理商在线和分发算法，以渐近地估计平均值。我们将估计值的错误结合和收敛属性提供给我们算法下的真实均值。基于网络拓扑，我们进一步评估了每个代理商在合并邻居的数据和仅在本地观察中学习之间的融合率的权衡。

我们研究以分布式和在线方式估算未知参数的问题。现有在分布式在线学习的工作通常专注于渐近分析，或者为后悔提供界限。但是，这些结果可能不会直接转化为有限的时间段数后学习模型的误差的界限。在本文中，我们提出了一种分布式的在线估计算法，该算法使网络中的每个代理都可以通过与邻居进行通信来提高其估计精度。我们在估计误差上提供了非反应界限，利用了基础模型的统计特性。我们的分析表明，估计错误和通信成本之间的权衡。此外，我们的分析使我们能够确定可以停止通信的时间（由于与通信相关的成本），同时达到所需的估计准确性。我们还提供了一个数值示例来验证我们的结果。

检测裂缝是监测结构健康和确保结构安全的关键任务。裂纹检测的手动过程是耗时的，对检查员进行了主观。一些研究人员尝试使用传统的图像处理或基于学习的技术来解决此问题。但是，它们的工作范围仅限于检测单一类型的表面（墙壁，人行道，玻璃等）上的裂缝。用于评估这些方法的指标在整个文献中也有所不同，这使得比较技术具有挑战性。本文通过结合先前可用的数据集并通过解决每个数据集中的固有问题（例如噪声和扭曲）来解决这些问题。我们还提出了结合图像处理和深度学习模型的管道。最后，我们在新数据集上对这些指标的建议模型的结果进行了基准测试，并将它们与文献中的最新模型进行了比较。