我们引入了一个球形指尖传感器进行动态操作。它基于气压压力和飞行时间接近传感器,并且是低延迟,紧凑且身体健壮的。传感器使用训练有素的神经网络根据压力传感器的数据来估计接触位置和三轴接触力,这些数据嵌入了传感器的聚氨酯橡胶范围内。飞行器传感器朝三个不同的外向方向面对,并且一个集成的微控制器样品以200 Hz的速度每个单个传感器。为了量化系统潜伏期对动态操作性能的影响,我们开发和分析了一个称为碰撞脉冲比率的度量,并表征了我们新传感器的端到端潜伏期。我们还向传感器提出了实验演示,包括测量接触过渡,进行粗大映射,与移动物体保持接触力以及避免碰撞的反应。
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现代的机器人操纵系统缺乏人类的操纵技巧,部分原因是它们依靠围绕视觉数据的关闭反馈循环,这会降低系统的带宽和速度。通过开发依赖于高带宽力,接触和接近数据的自主握力反射,可以提高整体系统速度和鲁棒性,同时减少对视力数据的依赖。我们正在开发一个围绕低渗透的高速手臂建造的新系统,该系统用敏捷的手指结合了一个高级轨迹计划器,以小于1 Hz的速度运行,低级自主反射控制器的运行量超过300 Hz。我们通过将成功的基线控制器和反射握把控制器的变化的成功抓Grasps的体积和反射系统的体积进行比较,从而表征了反射系统,发现我们的控制器将成功的掌握率与基线相比扩大了55%。我们还使用简单的基于视觉的计划者在自主杂波清除任务中部署了反身抓握控制器,在清除100多个项目的同时,达到了超过90%的成功率。
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人行道挑战的数据科学(DSPC)旨在通过提供一个基准的数据集和代码来加速自动化视觉系统,以进行路面状况监测和评估,以创新和开发机器学习算法,这些算法已准备就绪,可以准备好练习。行业使用。比赛的第一版吸引了来自8个国家的22支球队。要求参与者自动检测和分类从多个来源捕获的图像中存在的不同类型的路面遇险,并且在不同的条件下。竞争是以数据为中心的:通过利用各种数据修改方法(例如清洁,标签和增强),团队的任务是提高预定义模型体系结构的准确性。开发了一个实时的在线评估系统,以根据F1分数对团队进行排名。排行榜的结果显示了机器在路面监控和评估中提高自动化的希望和挑战。本文总结了前5个团队的解决方案。这些团队提出了数据清洁,注释,增强和检测参数调整领域的创新。排名最高的团队的F1得分约为0.9。本文以对当前挑战效果很好的不同实验的综述以及对模型准确性的任何显着提高的审查进行了综述。
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视觉变压器(VIT)最近在一系列计算机视觉任务中占据了主导地位,但训练数据效率低下,局部语义表示能力较低,而没有适当的电感偏差。卷积神经网络(CNNS)固有地捕获了区域感知语义,激发了研究人员将CNN引入VIT的架构中,以为VIT提供理想的诱导偏见。但是,嵌入在VIT中的微型CNN实现的位置是否足够好?在本文中,我们通过深入探讨混合CNNS/VIT的宏观结构如何增强层次VIT的性能。特别是,我们研究了令牌嵌入层,别名卷积嵌入(CE)的作用,并系统地揭示了CE如何在VIT中注入理想的感应偏置。此外,我们将最佳CE配置应用于最近发布的4个最先进的Vits,从而有效地增强了相应的性能。最后,释放了一个有效的混合CNN/VIT家族,称为CETNET,可以用作通用的视觉骨架。具体而言,CETNET在Imagenet-1K上获得了84.9%的TOP-1准确性(从头开始训练),可可基准上的48.6%的盒子地图和ADE20K上的51.6%MIOU,从而显着提高了相应的最新态度的性能。艺术基线。
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最近,卷积神经网络(CNN)技术具有普及作为高光谱图像分类(HSIC)的工具。为了在有限样品的条件下提高HSIC的特征提取效率,目前的方法通常使用大量层的深层模型。然而,当样品有限时,深网络模型容易出现过度拟合和梯度消失问题。此外,空间分辨率严重降低,深度深度,这对空间边缘特征提取非常有害。因此,这封信提出了一种HSIC的浅模型,称为深度过度参数化卷积神经网络(DOCNN)。为了确保浅模型的有效提取,引入深度过度参数化卷积(DO-CONV)内核以提取歧视特征。深度过度参数化卷积内核由标准卷积内核和深度卷积内核组成,其可以单独地提取不同信道的空间特征,并同时熔合整个通道的空间特征。此外,为了进一步减少由于卷积操作引起的空间边缘特征的损失,提出了一种密集的残余连接(DRC)结构以适用于整个网络的特征提取部分。从三个基准数据集获得的实验结果表明,该方法在分类准确度和计算效率方面优于其他最先进的方法。
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The 3D-aware image synthesis focuses on conserving spatial consistency besides generating high-resolution images with fine details. Recently, Neural Radiance Field (NeRF) has been introduced for synthesizing novel views with low computational cost and superior performance. While several works investigate a generative NeRF and show remarkable achievement, they cannot handle conditional and continuous feature manipulation in the generation procedure. In this work, we introduce a novel model, called Class-Continuous Conditional Generative NeRF ($\text{C}^{3}$G-NeRF), which can synthesize conditionally manipulated photorealistic 3D-consistent images by projecting conditional features to the generator and the discriminator. The proposed $\text{C}^{3}$G-NeRF is evaluated with three image datasets, AFHQ, CelebA, and Cars. As a result, our model shows strong 3D-consistency with fine details and smooth interpolation in conditional feature manipulation. For instance, $\text{C}^{3}$G-NeRF exhibits a Fr\'echet Inception Distance (FID) of 7.64 in 3D-aware face image synthesis with a $\text{128}^{2}$ resolution. Additionally, we provide FIDs of generated 3D-aware images of each class of the datasets as it is possible to synthesize class-conditional images with $\text{C}^{3}$G-NeRF.
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In both terrestrial and marine ecology, physical tagging is a frequently used method to study population dynamics and behavior. However, such tagging techniques are increasingly being replaced by individual re-identification using image analysis. This paper introduces a contrastive learning-based model for identifying individuals. The model uses the first parts of the Inception v3 network, supported by a projection head, and we use contrastive learning to find similar or dissimilar image pairs from a collection of uniform photographs. We apply this technique for corkwing wrasse, Symphodus melops, an ecologically and commercially important fish species. Photos are taken during repeated catches of the same individuals from a wild population, where the intervals between individual sightings might range from a few days to several years. Our model achieves a one-shot accuracy of 0.35, a 5-shot accuracy of 0.56, and a 100-shot accuracy of 0.88, on our dataset.
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Feature selection helps reduce data acquisition costs in ML, but the standard approach is to train models with static feature subsets. Here, we consider the dynamic feature selection (DFS) problem where a model sequentially queries features based on the presently available information. DFS is often addressed with reinforcement learning (RL), but we explore a simpler approach of greedily selecting features based on their conditional mutual information. This method is theoretically appealing but requires oracle access to the data distribution, so we develop a learning approach based on amortized optimization. The proposed method is shown to recover the greedy policy when trained to optimality and outperforms numerous existing feature selection methods in our experiments, thus validating it as a simple but powerful approach for this problem.
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The purpose of this work was to tackle practical issues which arise when using a tendon-driven robotic manipulator with a long, passive, flexible proximal section in medical applications. A separable robot which overcomes difficulties in actuation and sterilization is introduced, in which the body containing the electronics is reusable and the remainder is disposable. A control input which resolves the redundancy in the kinematics and a physical interpretation of this redundancy are provided. The effect of a static change in the proximal section angle on bending angle error was explored under four testing conditions for a sinusoidal input. Bending angle error increased for increasing proximal section angle for all testing conditions with an average error reduction of 41.48% for retension, 4.28% for hysteresis, and 52.35% for re-tension + hysteresis compensation relative to the baseline case. Two major sources of error in tracking the bending angle were identified: time delay from hysteresis and DC offset from the proximal section angle. Examination of these error sources revealed that the simple hysteresis compensation was most effective for removing time delay and re-tension compensation for removing DC offset, which was the primary source of increasing error. The re-tension compensation was also tested for dynamic changes in the proximal section and reduced error in the final configuration of the tip by 89.14% relative to the baseline case.
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According to the rapid development of drone technologies, drones are widely used in many applications including military domains. In this paper, a novel situation-aware DRL- based autonomous nonlinear drone mobility control algorithm in cyber-physical loitering munition applications. On the battlefield, the design of DRL-based autonomous control algorithm is not straightforward because real-world data gathering is generally not available. Therefore, the approach in this paper is that cyber-physical virtual environment is constructed with Unity environment. Based on the virtual cyber-physical battlefield scenarios, a DRL-based automated nonlinear drone mobility control algorithm can be designed, evaluated, and visualized. Moreover, many obstacles exist which is harmful for linear trajectory control in real-world battlefield scenarios. Thus, our proposed autonomous nonlinear drone mobility control algorithm utilizes situation-aware components those are implemented with a Raycast function in Unity virtual scenarios. Based on the gathered situation-aware information, the drone can autonomously and nonlinearly adjust its trajectory during flight. Therefore, this approach is obviously beneficial for avoiding obstacles in obstacle-deployed battlefields. Our visualization-based performance evaluation shows that the proposed algorithm is superior from the other linear mobility control algorithms.
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