我们建议使用$ \ tilde {o}(\ sqrt {\ kappa^{ - 1} \ phi t} \ phi t})$ hears $ t $ the $ \ phi $ phi $是$ \ phi $是最olutimut,$ \ phi $是$ \ phi $,我们提出了一种用于广义线性奖励的新颖的上下文强盗算法。上下文协方差和$ \ kappa $的特征值是奖励差异的下限。在几种实际情况下,$ \ phi = o(d)$,我们的结果是带有$ \ sqrt {d} $的广义线性模型(GLM)土匪的第一个遗憾,而无需依赖Auer [2002]的方法。我们使用一个称为双重运动估计器的新型估计器(Doubly-bobust(DR)估计器的子类,但误差较紧,我们就实现了这种结合。 Auer [2002]的方法通过丢弃观察到的奖励来实现独立性,而我们的算法则在使用我们的DDR估计器的所有情况下实现了独立性。我们还提供了一个$ o(\ kappa^{ - 1} \ phi \ log(nt)\ log t)$遗憾在概率的边缘条件下以$ n $武器约束。 Bastani和Bayati [2020]和Bastani等人给出了遗憾的界限。 [2021]在环境中,所有臂都是共同的,但系数是特定的。当所有臂的上下文都不同,但系数很常见时,我们的第一个遗憾是在线性模型或GLM的边缘条件下绑定的。我们使用合成数据和真实示例进行实证研究,证明了我们的算法的有效性。
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我们为线性上下文匪徒提出了一种新颖的算法(\ sqrt {dt \ log t})$遗憾,其中$ d $是上下文的尺寸,$ t $是时间范围。我们提出的算法配备了一种新型估计量,其中探索通过显式随机化嵌入。根据随机化的不同,我们提出的估计器从所有武器的上下文或选定的上下文中都取得了贡献。我们为我们的估计器建立了一个自称的绑定,这使累积遗憾的新颖分解为依赖添加剂的术语而不是乘法术语。在我们的问题设置下,我们还证明了$ \ omega(\ sqrt {dt})$的新颖下限。因此,我们提出的算法的遗憾与对数因素的下限相匹配。数值实验支持理论保证,并表明我们所提出的方法的表现优于现有的线性匪徒算法。
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鲁棒性正成为联合学习的另一个重要挑战,因为每个客户的数据收集过程自然都伴有嘈杂的标签。但是,由于客户的数据异质性和噪音的不同程度,这加剧了客户到客户的性能差异,因此它更加复杂且具有挑战性。在这项工作中,我们提出了一种名为FedRn的强大联合学习方法,该方法利用具有高数据专业知识或相似性的K邻居邻居。我们的方法仅通过一组选定的干净示例训练,通过其结合混合模型确定,有助于减轻低绩效客户端之间的差距。我们通过对三个现实世界或合成基准数据集进行广泛评估来证明FedRN的优势。与现有的强大训练方法相比,结果表明,在嘈杂标签的存在下,联邦烷可显着提高测试准确性。
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弱监督的语义细分(WSSS)旨在仅使用用于训练的图像级标签来产生像素类预测。为此,以前的方法采用了通用管道:它们从类激活图(CAM)生成伪口罩,并使用此类掩码来监督分割网络。但是,由于凸轮的局部属性,即它们倾向于仅专注于小的判别对象零件,因此涵盖涵盖整个物体的全部范围的全面伪面罩是一项挑战。在本文中,我们将CAM的局部性与卷积神经网络(CNNS)的质地偏见特性相关联。因此,我们建议利用形状信息来补充质地偏见的CNN特征,从而鼓励掩模预测不仅是全面的,而且还与物体边界相交。我们通过一种新颖的改进方法进一步完善了在线方式的预测,该方法同时考虑了类和颜色亲和力,以生成可靠的伪口罩以监督模型。重要的是,我们的模型是在单阶段框架内进行端到端训练的,因此在培训成本方面有效。通过对Pascal VOC 2012的广泛实验,我们验证了方法在产生精确和形状对准的分割结果方面的有效性。具体而言,我们的模型超过了现有的最新单阶段方法。此外,当在没有铃铛和哨声的简单两阶段管道中采用时,它还在多阶段方法上实现了新的最新性能。
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了解产品内容的视觉和语言表示对于电子商务中的搜索和推荐应用程序至关重要。作为在线购物平台的骨干,受到代表学习研究的最新成功的启发,我们提出了一个对比度学习框架,该框架使用未标记的原始产品文本和图像来对齐语言和视觉模型。我们介绍了我们用来培训大规模代表性学习模型的技术,并共享解决特定领域挑战的解决方案。我们使用预先训练的模型作为多种下游任务的骨干进行研究,包括类别分类,属性提取,产品匹配,产品聚类和成人产品识别。实验结果表明,我们所提出的方法在每个下游任务中均优于单个模态和多种方式的基线。
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The 3D-aware image synthesis focuses on conserving spatial consistency besides generating high-resolution images with fine details. Recently, Neural Radiance Field (NeRF) has been introduced for synthesizing novel views with low computational cost and superior performance. While several works investigate a generative NeRF and show remarkable achievement, they cannot handle conditional and continuous feature manipulation in the generation procedure. In this work, we introduce a novel model, called Class-Continuous Conditional Generative NeRF ($\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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