Unmanned aerial vehicles (UAVs) with on-board cameras are widely used for remote surveillance and video capturing applications. In remote virtual reality (VR) applications, multiple UAVs can be used to capture different partially overlapping angles of the ground target, which can be stitched together to provide 360{\deg} views. This requires coordinated formation of UAVs that is adaptive to movements of the ground target. In this paper, we propose a joint UAV formation and tracking framework to capture 360{\deg} angles of the target. The proposed framework uses a zero touch approach for automated and adaptive reconfiguration of multiple UAVs in a coordinated manner without the need for human intervention. This is suited to both military and civilian applications. Simulation results demonstrate the convergence and configuration of the UAVs with arbitrary initial locations and orientations. The performance has been tested for various number of UAVs and different mobility patterns of the ground target.
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未来几年物联网设备计数的预期增加促使有效算法的开发,可以帮助其有效管理,同时保持功耗低。在本文中,我们提出了一种智能多通道资源分配算法,用于Loradrl的密集Lora网络,并提供详细的性能评估。我们的结果表明,所提出的算法不仅显着提高了Lorawan的分组传递比(PDR),而且还能够支持移动终端设备(EDS),同时确保较低的功耗,因此增加了网络的寿命和容量。}大多数之前作品侧重于提出改进网络容量的不同MAC协议,即Lorawan,传输前的延迟等。我们展示通过使用Loradrl,我们可以通过Aloha \ TextColor {Black}与Lorasim相比,我们可以实现相同的效率LORA-MAB在将复杂性从EDS移动到网关的同时,因此使EDS更简单和更便宜。此外,我们在大规模的频率干扰攻击下测试Loradrl的性能,并显示其对环境变化的适应性。我们表明,与基于学习的技术相比,Loradrl的输出改善了最先进的技术的性能,从而提高了PR的500多种\%。
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Before the transition of AVs to urban roads and subsequently unprecedented changes in traffic conditions, evaluation of transportation policies and futuristic road design related to pedestrian crossing behavior is of vital importance. Recent studies analyzed the non-causal impact of various variables on pedestrian waiting time in the presence of AVs. However, we mainly investigate the causal effect of traffic density on pedestrian waiting time. We develop a Double/Debiased Machine Learning (DML) model in which the impact of confounders variable influencing both a policy and an outcome of interest is addressed, resulting in unbiased policy evaluation. Furthermore, we try to analyze the effect of traffic density by developing a copula-based joint model of two main components of pedestrian crossing behavior, pedestrian stress level and waiting time. The copula approach has been widely used in the literature, for addressing self-selection problems, which can be classified as a causality analysis in travel behavior modeling. The results obtained from copula approach and DML are compared based on the effect of traffic density. In DML model structure, the standard error term of density parameter is lower than copula approach and the confidence interval is considerably more reliable. In addition, despite the similar sign of effect, the copula approach estimates the effect of traffic density lower than DML, due to the spurious effect of confounders. In short, the DML model structure can flexibly adjust the impact of confounders by using machine learning algorithms and is more reliable for planning future policies.
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Neuromorphic vision or event vision is an advanced vision technology, where in contrast to the visible camera that outputs pixels, the event vision generates neuromorphic events every time there is a brightness change which exceeds a specific threshold in the field of view (FOV). This study focuses on leveraging neuromorphic event data for roadside object detection. This is a proof of concept towards building artificial intelligence (AI) based pipelines which can be used for forward perception systems for advanced vehicular applications. The focus is on building efficient state-of-the-art object detection networks with better inference results for fast-moving forward perception using an event camera. In this article, the event-simulated A2D2 dataset is manually annotated and trained on two different YOLOv5 networks (small and large variants). To further assess its robustness, single model testing and ensemble model testing are carried out.
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Unmanned air vehicles (UAVs) popularity is on the rise as it enables the services like traffic monitoring, emergency communications, deliveries, and surveillance. However, the unauthorized usage of UAVs (a.k.a drone) may violate security and privacy protocols for security-sensitive national and international institutions. The presented challenges require fast, efficient, and precise detection of UAVs irrespective of harsh weather conditions, the presence of different objects, and their size to enable SafeSpace. Recently, there has been significant progress in using the latest deep learning models, but those models have shortcomings in terms of computational complexity, precision, and non-scalability. To overcome these limitations, we propose a precise and efficient multiscale and multifeature UAV detection network for SafeSpace, i.e., \textit{MultiFeatureNet} (\textit{MFNet}), an improved version of the popular object detection algorithm YOLOv5s. In \textit{MFNet}, we perform multiple changes in the backbone and neck of the YOLOv5s network to focus on the various small and ignored features required for accurate and fast UAV detection. To further improve the accuracy and focus on the specific situation and multiscale UAVs, we classify the \textit{MFNet} into small (S), medium (M), and large (L): these are the combinations of various size filters in the convolution and the bottleneckCSP layers, reside in the backbone and neck of the architecture. This classification helps to overcome the computational cost by training the model on a specific feature map rather than all the features. The dataset and code are available as an open source: github.com/ZeeshanKaleem/MultiFeatureNet.
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从同一场景的单个或多个低分辨率图像中获取高分辨率图像的过程对于现实世界图像和信号处理应用非常感兴趣。这项研究是关于探索基于深度学习的图像超分辨率算法的潜在用法,用于为驾驶汽车内车辆驾驶员监测系统产生高质量的热成像结果。在这项工作中,我们提出并开发了一种新型的多图像超分辨率复发性神经网络,以增强分辨率并提高从未冷却的热摄像机捕获的低分辨率热成像数据的质量。端到端完全卷积神经网络在室内环境条件下从刮擦上训练了30个不同受试者的新获得的热数据。热调谐超分辨率网络的有效性已定量验证,以及在6个不同受试者的测试数据上进行定性验证。该网络能够在验证数据集上达到4倍超分辨率的平均峰信号与噪声比为39.24,在定量和质量上都超过了双色插值。
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Starcraft II多代理挑战(SMAC)被创建为合作多代理增强学习(MARL)的具有挑战性的基准问题。 SMAC专注于星际争霸微管理的问题,并假设每个单元都由独立行动并仅具有本地信息的学习代理人单独控制;假定通过分散执行(CTDE)进行集中培训。为了在SMAC中表现良好,MARL算法必须处理多机构信贷分配和联合行动评估的双重问题。本文介绍了一种新的体系结构Transmix,这是一个基于变压器的联合行动值混合网络,与其他最先进的合作MARL解决方案相比,我们显示出高效且可扩展的。 Transmix利用变形金刚学习更丰富的混合功能的能力来结合代理的个人价值函数。它与以前的SMAC场景上的工作相当,并且在困难场景上胜过其他技术,以及被高斯噪音损坏的场景以模拟战争的雾。
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深度卷积神经网络(CNN)最近已达到最先进的手写文本识别(HTR)性能。但是,最近的研究表明,典型的CNN的学习性能是有限的,因为它们是具有简单(线性)神经元模型的同质网络。由于它们的异质网络结构结合了非线性神经元,最近提出了操作神经网络(ONNS)来解决这一缺点。自我结合是具有生成神经元模型的ONN的自组织变化,可以使用泰勒近似来生成任何非线性函数。在这项研究中,为了提高HTR的最新性能水平,提出了新型网络模型核心中的2D自组织(自我强调)。此外,本研究中使用了可变形的卷积,最近被证明可以更好地解决写作风格的变化。 IAM英语数据集和Hadara80p阿拉伯数据集中的结果表明,具有自我影响的操作层的拟议模型显着提高了字符错误率(CER)和单词错误率(WER)。与同行CNN相比,Hadara80p中的自我强调将CER和3.4%降低,在IAM数据集中,自我强调将CER降低1.2%和3.4%,为0.199%和1.244%。基准IAM上的结果表明,与自相互紧缩的操作层的拟议模型通过显着的边缘优于最近的深CNN模型,而使用具有可变形卷积的自我冲突表明了出色的结果。
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多语言语音识别已引起大幅关注,作为补偿低资源语言数据稀缺性的有效方法。端到端(E2E)建模比常规混合系统优选,这主要是由于没有词典要求。但是,在有限的数据方案中,混合DNN-HMM仍然优于E2E模型。此外,手动词典创建的问题已通过公开训练的素式训练型(G2P)(G2P)和多种语言的IPA音译来缓解。在本文中,在低资源语言的多语言设置中提出了一种混合DNN-HMM声学模型的新型方法。针对目标语言语言信号的不同单语言模型的后验分布融合在一起。为每个源目标语言对训练了一个单独的回归神经网络,以将后者从源声学模型转换为目标语言。与ASR培训相比,这些网络需要非常有限的数据。与多语言和单语基线相比,后融合的相对增益分别为14.65%和6.5%。跨语性模型融合表明,无需使用依赖语言的ASR的后代,就可以实现可比的结果。
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多语言自动语音识别(ASR)系统大多受益于低资源语言,但相对于单语言对应物,多种语言的性能下降。有限的研究集中在理解多语言语音识别设置中的语言行为。在本文中,提出了一种新型的数据驱动方法来研究跨语性的声学表达相似性。该技术衡量了各种单语言模型与目标语音信号的后验分布之间的相似性。深度神经网络被训练为映射网络,以将分布从不同的声学模型转换为直接比较的形式。分析观察到,语言接近性无法通过集合音素的体积真正估计。对拟议的映射网络的熵分析表明,具有较小重叠的语言可以更适合跨语性转移,因此在多语言设置中更有益。最后,提出的后验变换方法被利用为目标语言的单语模型融合。比单语言对应物的相对提高约为8%。
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