播客本质上是对话性的,说话者的变化很频繁 - 需要说话者诊断以了解内容。我们在不依赖语言特定组件的情况下提出了一种无监督的技术诊断技术。该算法是重叠的,不需要有关说话者数量的信息。我们的方法显示,针对播客数据的Google Cloud Platform解决方案,纯度得分(F-评分为34%)的纯度得分提高了79%。
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This paper proposes a perception and path planning pipeline for autonomous racing in an unknown bounded course. The pipeline was initially created for the 2021 evGrandPrix autonomous division and was further improved for the 2022 event, both of which resulting in first place finishes. Using a simple LiDAR-based perception pipeline feeding into an occupancy grid based expansion algorithm, we determine a goal point to drive. This pipeline successfully achieved reliable and consistent laps in addition with occupancy grid algorithm to know the ways around a cone-defined track with an averaging speeds of 6.85 m/s over a distance 434.2 meters for a total lap time of 63.4 seconds.
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Over the years, Machine Learning models have been successfully employed on neuroimaging data for accurately predicting brain age. Deviations from the healthy brain aging pattern are associated to the accelerated brain aging and brain abnormalities. Hence, efficient and accurate diagnosis techniques are required for eliciting accurate brain age estimations. Several contributions have been reported in the past for this purpose, resorting to different data-driven modeling methods. Recently, deep neural networks (also referred to as deep learning) have become prevalent in manifold neuroimaging studies, including brain age estimation. In this review, we offer a comprehensive analysis of the literature related to the adoption of deep learning for brain age estimation with neuroimaging data. We detail and analyze different deep learning architectures used for this application, pausing at research works published to date quantitatively exploring their application. We also examine different brain age estimation frameworks, comparatively exposing their advantages and weaknesses. Finally, the review concludes with an outlook towards future directions that should be followed by prospective studies. The ultimate goal of this paper is to establish a common and informed reference for newcomers and experienced researchers willing to approach brain age estimation by using deep learning models
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In the human brain, essential iron molecules for proper neurological functioning exist in transferrin (tf) and ferritin (Fe3) forms. However, its unusual increment manifests iron overload, which reacts with hydrogen peroxide. This reaction will generate hydroxyl radicals, and irons higher oxidation states. Further, this reaction causes tissue damage or cognitive decline in the brain and also leads to neurodegenerative diseases. The susceptibility difference due to iron overload within the volume of interest (VOI) responsible for field perturbation of MRI and can benefit in estimating the neural disorder. The quantitative susceptibility mapping (QSM) technique can estimate susceptibility alteration and assist in quantifying the local tissue susceptibility differences. It has attracted many researchers and clinicians to diagnose and detect neural disorders such as Parkinsons, Alzheimers, Multiple Sclerosis, and aging. The paper presents a systematic review illustrating QSM fundamentals and its processing steps, including phase unwrapping, background field removal, and susceptibility inversion. Using QSM, the present work delivers novel predictive biomarkers for various neural disorders. It can strengthen new researchers fundamental knowledge and provides insight into its applicability for cognitive decline disclosure. The paper discusses the future scope of QSM processing stages and their applications in identifying new biomarkers for neural disorders.
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Structural alterations have been thoroughly investigated in the brain during the early onset of schizophrenia (SCZ) with the development of neuroimaging methods. The objective of the paper is an efficient classification of SCZ in 2 different classes: Cognitive Normal (CN), and SCZ using magnetic resonance imaging (MRI) images. This paper proposed a lightweight 3D convolutional neural network (CNN) based framework for SCZ diagnosis using MRI images. In the proposed model, lightweight 3D CNN is used to extract both spatial and spectral features simultaneously from 3D volume MRI scans, and classification is done using an ensemble bagging classifier. Ensemble bagging classifier contributes to preventing overfitting, reduces variance, and improves the model's accuracy. The proposed algorithm is tested on datasets taken from three benchmark databases available as open-source: MCICShare, COBRE, and fBRINPhase-II. These datasets have undergone preprocessing steps to register all the MRI images to the standard template and reduce the artifacts. The model achieves the highest accuracy 92.22%, sensitivity 94.44%, specificity 90%, precision 90.43%, recall 94.44%, F1-score 92.39% and G-mean 92.19% as compared to the current state-of-the-art techniques. The performance metrics evidenced the use of this model to assist the clinicians for automatic accurate diagnosis of SCZ.
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最近,分布式的半监督学习(DSSL)算法表明,它们在利用未标记的样本优于互连网络方面的有效性,在这些网络上,代理无法彼此共享其原始数据,并且只能与邻居传达非敏感信息。但是,现有的DSSL算法无法应对数据不确定性,并且可能会遭受高度计算和通信开销问题的困扰。为了解决这些问题,我们提出了一个分布式的半监督模糊回归(DSFR)模型,该模型具有模糊的规则和插值一致性正则化(ICR)。 ICR最近是针对半监督问题的,可以迫使决策边界通过稀疏的数据区域,从而增加模型的鲁棒性。但是,尚未考虑其在分布式方案中的应用。在这项工作中,我们提出了分布式模糊C均值(DFCM)方法和分布式插值一致性正则化(DICR)(DICR)构建在众所周知的乘数交替方向方法上,以分别定位DSFR的先行和结果组件中的参数。值得注意的是,DSFR模型的收敛非常快,因为它不涉及后传播过程,并且可扩展到从DFCM和DICR的利用率中受益的大规模数据集。人工和现实世界数据集的实验结果表明,就损失价值和计算成本而言,提出的DSFR模型可以比最新的DSSL算法获得更好的性能。
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决策树的集合被称为随机森林。如Breiman所提出的,不稳定学习者的实力和它们之间的多样性是集合模型的核心力量。在本文中,我们提出了两种用于生成双随机森林的合奏方法。在第一种方法中,我们提出了一种基于双随机森林的旋转组合。在基于旋转的双随机林,在每个节点处产生特征空间的转换或旋转。在每个节点上选择不同随机特征子空间进行评估,因此每个节点处的变换是不同的。不同的转变导致基本学习者之间更好的多样性,因此,更好的泛化性能。随着双随机森林作为基础学习者,每个节点的数据通过两个不同的变换转换,即主成分分析和线性判别分析。在第二种方法中,我们提出了双随机森林的倾斜组合。在随机林和双随机森林中的决策树是单变量的,这导致轴并行分裂的产生,这不能捕获数据的几何结构。此外,标准随机森林可能不会产生足够大的决策树,从而导致次优的性能。为了捕获几何属性并生长足够深度的决策树,我们提出了双随机森林的倾斜集合。双随机森林模型的倾斜集合是多元决策树。在每个非叶节点上,多面近端支持向量机产生最佳平面以获得更好的泛化性能。此外,不同的正则化技术(Tikhonov正则化和轴并行分裂正则化)用于解决双随机林的倾斜组合决策树中的小样本大小问题。
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双支持向量机(TWSVM)和双支持向量回归(TSVR)是新兴有效的机器学习技术,可分别为分类和回归挑战提供了有希望的解决方案。 TWSVM基于该想法来识别两个非平行超平面,将数据指向其各自的类分类。它需要解决两个小型大小的二次编程问题(QPPS)代替求解单个大尺寸QPP在支持向量机(SVM),而TSVR配制在TWSVM的线上,并要求解决两个SVM类问题。虽然这些技术已经有很好的研究进展;关于TSVR的不同变体的比较有限的文献。因此,本综述对TWSVM和TSVR的最近研究同时提到了它们的局限性和优势,对最近的研究提供了严格的分析。首先,首先介绍支持向量机,TWSVM的基本理论,然后专注于TWSVM的各种改进和应用,然后介绍TSVR及其各种增强功能。最后,我们建议未来的研发前景。
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合奏学习结合了几个单独的模型,以获得更好的概括性能。目前,与浅层或传统模型相比,深度学习体系结构表现更好。深度合奏学习模型结合了深度学习模型以及整体学习的优势,使最终模型具有更好的概括性能。本文回顾了最先进的深度合奏模型,因此是研究人员的广泛摘要。合奏模型广泛地分类为包装,增强,堆叠,基于负相关的深度合奏模型,显式/隐式合奏,同质/异质合奏,基于决策融合策略的深层集合模型。还简要讨论了在不同领域中深层集成模型的应用。最后,我们以一些潜在的未来研究方向结束了本文。
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口头和非口头线索对伟大公开发言的作用是多十年来探索的主题。我们在渠道或通信方式中识别出现在现状理论的共性,“品种或异质性”(例如,借助故事,科学事实,情绪联系,面部表情等),这对于有效地传达信息至关重要。我们使用该观察来形式化新颖的异质性度量下摆下摆,这些度量下降,这量化了口头和非言语域(转录物和面部手势)的谈话的质量。我们使用TED会谈作为公开演讲的输入存储库,因为它包括除了广泛的外展之外的不同社区的发言者。我们表明,下摆之间存在有趣的关系,以及观众对发言人的TED谈判的评级。它强调,隐生和成功地代表了基于“品种或异质性”谈话的质量。此外,我们还发现HIM成功地捕获了与种族和性别的评级中的普遍存在偏见,我们呼叫敏感属性(因为基于这些可能导致不公平结果的预测)。我们将下降度量纳入神经网络的损失功能,以减少与种族和性别的评级预测的不公平。我们的研究结果表明,改进的损耗函数在不显着影响神经网络的预测准确性的情况下提高了预测的公平性。我们的工作在口头和非言语域中的公共演讲中的一个新的公共演讲与神经网络的计算能力设计为扬声器设计公平预测系统。
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