Reliable and efficient validation technologies are critical for the recent development of multi-vehicle cooperation and vehicle-road-cloud integration. In this paper, we introduce our miniature experimental platform, Mixed Cloud Control Testbed (MCCT), developed based on a new notion of Mixed Digital Twin (mixedDT). Combining Mixed Reality with Digital Twin, mixedDT integrates the virtual and physical spaces into a mixed one, where physical entities coexist and interact with virtual entities via their digital counterparts. Under the framework of mixedDT, MCCT contains three major experimental platforms in the physical, virtual and mixed spaces respectively, and provides a unified access for various human-machine interfaces and external devices such as driving simulators. A cloud unit, where the mixed experimental platform is deployed, is responsible for fusing multi-platform information and assigning control instructions, contributing to synchronous operation and real-time cross-platform interaction. Particularly, MCCT allows for multi-vehicle coordination composed of different multi-source vehicles (\eg, physical vehicles, virtual vehicles and human-driven vehicles). Validations on vehicle platooning demonstrate the flexibility and scalability of MCCT.

扩散MRI拖拉术是一种先进的成像技术，可实现大脑白质连接的体内映射。白质拟层将拖拉机分类为簇或解剖学上有意义的区域。它可以量化和可视化全脑拖拉学。当前，大多数拟层方法都集中在深白质（DWM）上，而由于其复杂性，更少的方法解决了浅表白质（SWM）。我们提出了一种新型的两阶段深度学习的框架，即浅表白质分析（SUPWMA​​），该框架对全脑拖拉机的198个SWM簇进行了有效且一致的分析。一个基于点云的网络适应了我们的SWM分析任务，并且监督的对比度学习可以在SWM的合理流线和离群值之间进行更多的歧视性表示。我们在大规模拖拉机数据集上训练模型，包括来自标签的SWM簇和解剖学上难以置信的流线样本的简化样品，我们对六个不同年龄和健康状况的独立获取的数据集进行测试（包括新生儿和具有空间型脑肿瘤的患者） ）。与几种最先进的方法相比，SupWMA在所有数据集上获得了高度一致，准确的SWM分析结果，在整个健康和疾病的寿命中都良好的概括。另外，SUPWMA​​的计算速度比其他方法快得多。

白质图微观结构已显示出影响认知表现的神经心理学评分。但是，尚未尝试从白质图数据中预测这些分数。在本文中，我们提出了一个基于深度学习的框架，用于使用从扩散磁共振成像（DMRI）片段估计的微观结构测量结果进行神经心理学评分的预测，该框架的重点是基于接受语言的关键纤维纤维小道的接受性词汇评估任务的性能弓形筋膜（AF）。我们直接利用来自纤维道中所有点的信息，而无需按照传统上沿着光纤的平均数据进行扩散MRI Tractometry方法所要求的。具体而言，我们将AF表示为点云，每个点都有微观结构测量，从而可以采用基于点的神经网络。我们通过拟议的配对 - 塞亚姆损失来改善预测性能，该损失利用了有关连续神经心理学评分之间差异的信息。最后，我们提出了一种关键区域定位（CRL）算法来定位包含对预测结果有很大贡献的点的信息解剖区域。我们的方法对来自人类Connectome项目数据集的806名受试者的数据进行了评估。结果表明，与基线方法相比，神经心理评分的预测表现优异。我们发现，AF中的关键区域在受试者之间非常一致，额叶皮质区域的强大贡献最多（即，尾部中间额叶，pars opercularis和pars triangularis）与关键区域有着强烈的影响用于语言过程。

白质纤维聚类（WMFC）是白质细胞的重要策略，可以对健康和疾病中的白质连接进行定量分析。 WMFC通常以无监督的方式进行，而无需标记地面真相数据。尽管广泛使用的WMFC方法使用经典的机器学习技术显示出良好的性能，但深度学习的最新进展揭示了朝着快速有效的WMFC方向发展。在这项工作中，我们为WMFC，深纤维聚类（DFC）提出了一个新颖的深度学习框架，该框架解决了无监督的聚类问题，作为具有特定领域的借口任务，以预测成对的光纤距离。这使纤维表示能够在WMFC中学习已知的挑战，即聚类的敏感性对沿纤维的点排序的敏感性。我们设计了一种新颖的网络体系结构，该网络体系结构代表输入纤维作为点云，并允许从灰质拟合中纳入其他输入信息来源。因此，DFC利用有关白质纤维几何形状和灰质解剖结构的组合信息来改善纤维簇的解剖相干性。此外，DFC通过拒绝簇分配概率低的纤维来以自然方式进行异常去除。我们评估了三个独立获取的队列的DFC，包括来自220名性别，年龄（年轻和老年人）的220名个人的数据，以及不同的健康状况（健康对照和多种神经精神疾病）。我们将DFC与几种最先进的WMFC算法进行比较。实验结果表明，DFC在集群紧凑，泛化能力，解剖相干性和计算效率方面的表现出色。

Recent investigations on rotation invariance for 3D point clouds have been devoted to devising rotation-invariant feature descriptors or learning canonical spaces where objects are semantically aligned. Examinations of learning frameworks for invariance have seldom been looked into. In this work, we review rotation invariance in terms of point cloud registration and propose an effective framework for rotation invariance learning via three sequential stages, namely rotation-invariant shape encoding, aligned feature integration, and deep feature registration. We first encode shape descriptors constructed with respect to reference frames defined over different scales, e.g., local patches and global topology, to generate rotation-invariant latent shape codes. Within the integration stage, we propose Aligned Integration Transformer to produce a discriminative feature representation by integrating point-wise self- and cross-relations established within the shape codes. Meanwhile, we adopt rigid transformations between reference frames to align the shape codes for feature consistency across different scales. Finally, the deep integrated feature is registered to both rotation-invariant shape codes to maximize feature similarities, such that rotation invariance of the integrated feature is preserved and shared semantic information is implicitly extracted from shape codes. Experimental results on 3D shape classification, part segmentation, and retrieval tasks prove the feasibility of our work. Our project page is released at: https://rotation3d.github.io/.

We study the composition style in deep image matting, a notion that characterizes a data generation flow on how to exploit limited foregrounds and random backgrounds to form a training dataset. Prior art executes this flow in a completely random manner by simply going through the foreground pool or by optionally combining two foregrounds before foreground-background composition. In this work, we first show that naive foreground combination can be problematic and therefore derive an alternative formulation to reasonably combine foregrounds. Our second contribution is an observation that matting performance can benefit from a certain occurrence frequency of combined foregrounds and their associated source foregrounds during training. Inspired by this, we introduce a novel composition style that binds the source and combined foregrounds in a definite triplet. In addition, we also find that different orders of foreground combination lead to different foreground patterns, which further inspires a quadruplet-based composition style. Results under controlled experiments on four matting baselines show that our composition styles outperform existing ones and invite consistent performance improvement on both composited and real-world datasets. Code is available at: https://github.com/coconuthust/composition_styles

Deep learning networks have demonstrated state-of-the-art performance on medical image analysis tasks. However, the majority of the works rely heavily on abundantly labeled data, which necessitates extensive involvement of domain experts. Vision transformer (ViT) based generative adversarial networks (GANs) recently demonstrated superior potential in general image synthesis, yet are less explored for histopathology images. In this paper, we address these challenges by proposing a pure ViT-based conditional GAN model for histopathology image synthetic augmentation. To alleviate training instability and improve generation robustness, we first introduce a conditioned class projection method to facilitate class separation. We then implement a multi-loss weighing function to dynamically balance the losses between classification tasks. We further propose a selective augmentation mechanism to actively choose the appropriate generated images and bring additional performance improvements. Extensive experiments on the histopathology datasets show that leveraging our synthetic augmentation framework results in significant and consistent improvements in classification performance.

深度学习方法已成功用于各种计算机视觉任务。受到成功的启发，已经在磁共振成像（MRI）重建中探索了深度学习。特别是，整合深度学习和基于模型的优化方法已显示出很大的优势。但是，对于高重建质量，通常需要大量标记的培训数据，这对于某些MRI应用来说是具有挑战性的。在本文中，我们提出了一种名为DUREN-NET的新型重建方法，该方法可以通过组合无监督的DeNoising网络和插件方法来为MR图像重建提供可解释的无监督学习。我们的目标是通过添加明确的先验利用成像物理学来提高无监督学习的重建性能。具体而言，使用denoising（红色）正规化实现了MRI重建网络的杠杆作用。实验结果表明，所提出的方法需要减少训练数据的数量才能达到高重建质量。

无监督域适应（UDA）技术的最新进展在跨域计算机视觉任务中有巨大的成功，通过弥合域分布差距来增强数据驱动的深度学习架构的泛化能力。对于基于UDA的跨域对象检测方法，其中大多数通过对抗性学习策略引导域不变特征产生来缓解域偏差。然而，由于不稳定的对抗性培训过程，他们的域名鉴别器具有有限的分类能力。因此，它们引起的提取特征不能完全域不变，仍然包含域私有因素，使障碍物进一步缓解跨域差异。为了解决这个问题，我们设计一个域分离rcnn（DDF），以消除特定于检测任务学习的特定信息。我们的DDF方法促进了全局和本地阶段的功能解剖，分别具有全局三联脱离（GTD）模块和实例相似性解剖（ISD）模块。通过在四个基准UDA对象检测任务上表现出最先进的方法，对我们的DDF方法进行了宽阔的适用性。

对于不同的任务，已经越来越多地研究了一般点云，并且提出了最近的基于变换器的网络，用于点云分析。然而，医疗点云几乎没有相关的作品，这对疾病检测和治疗很重要。在这项工作中，我们提出了专门用于医疗点云的关注模型，即3D医疗点变压器（3Dmedpt），以检查复杂的生物结构。通过增强上下文信息并在查询时总结本地响应，我们的注意模块可以捕获本地上下文和全局内容功能交互。然而，医疗数据的培训样本不足可能导致特征学习差，因此我们应用位置嵌入，以学习准确的局部几何和多图形推理（MGR）来检查通过通道图的全局知识传播，以丰富特征表示。在数据集内进行的实验证明了3DMedpt的优越性，在那里我们达到了最佳分类和分割结果。此外，我们的方法的有希望的泛化能力在一般的3D点云基准测试中验证：ModelNet40和ShapenetPart。代码即将发布。