由于其在生物医学领域中的重要性,因此对癌症的早期发现进行了广泛的探索。在用于回答这个生物学问题的不同类型的数据中,由于对宿主免疫系统在肿瘤生物学中的作用的增长,基于T细胞受体(TCR)的研究受到了最近的关注。但是,患者和多个TCR序列之间的一对一对应关系阻碍了研究人员简单地采用经典的统计/机器学习方法。最近有尝试在多个实例学习(MIL)的上下文中对这种类型的数据进行建模。尽管使用TCR序列将MIL在癌症检测中采用了新的应用,并且在几种肿瘤类型中表现出了足够的表现,但仍然有改善的空间,尤其是对于某些癌症类型。此外,该应用程序未对可解释的神经网络模型进行全面研究。在本文中,我们提出了基于稀疏注意(Minn-SA)的多个实例神经网络,以增强癌症检测和解释性的性能。稀疏的注意力结构在每个袋子中散发出非信息的实例,可以与跳过连接结合使用可解释性和更好的预测性能。我们的实验表明,与现有的MIL方法相比,Minn-SA在ROC曲线(AUC)得分下的最高面积(AUC)得分平均得分。此外,我们从估计的注意力中观察到Minn-SA可以鉴定出对同一T细胞库中肿瘤抗原的特异性TCR。
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我们介绍韩语了解评估(KLUE)基准。 Klue是8个韩国自然语言理解(nlu)任务的集合,包括主题分类,语言典的相似性,自然语言推断,命名实体识别,关系提取,依赖解析,机器阅读理解和对话状态跟踪。我们从各种源语料库中展开的所有任务,同时尊重版权,以确保任何没有任何限制的人的可访问性。考虑到道德考虑,我们仔细设计了注释协议。随着基准任务和数据,我们为每个任务提供适用的评估指标和微调配方,为每项任务进行预训练语言模型。我们还释放了预用的语言模型(PLM),Klue-Bert和Klue-Roberta,以帮助在KLUE上再现基线模型,从而促进未来的研究。我们通过拟议的Klue基准套件从初步实验中进行了一些有趣的观察,已经证明了这款新的基准套件的有用性。首先,我们找到了klue-roberta-mantring的其他基线,包括多语种plms和现有的开源韩国plms。其次,即使我们从预先预测语料库中取代个人身份信息,我们也会看到性能下降最小,这表明隐私和NLU能力并不彼此可能。最后,我们发现,使用BPE标记与语素级预象的组合,在涉及语素级标记,检测和发电的任务中是有效的。除了加速韩国人NLP研究外,我们的创建Klue的全面文件将有助于将来为其他语言创建类似的资源。 klue在https://klue-benchmark.com上提供。
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精心设计的射频(RF)脉冲在许多系统(如移动电话,雷达和磁共振成像)中发挥着关键作用。然而,RF波形的设计通常是没有一般解决方案的逆问题。结果,基于人类专家的直觉开发了各种具有特定目的的设计方法。在这项工作中,我们提出了一种人工智能(AI) - 射频脉冲设计框架,DEEPRF,利用深增强学习的自学特征来产生新的RF脉冲。使用常用的四种RF脉冲来证明DEEPRF的有效性。 DEEPRF设计的脉冲成功地满足了设计标准,同时报告了降低的能量。分析证明脉冲利用新的磁化操作机制,暗示DEEPRF在发现超出人类直觉之外的看不见的设计尺寸时的潜力。这项工作可以为AI驱动的RF波形设计的新兴领域奠定基础。
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Recent directions for offensive language detection are hierarchical modeling, identifying the type and the target of offensive language, and interpretability with offensive span annotation and prediction. These improvements are focused on English and do not transfer well to other languages because of cultural and linguistic differences. In this paper, we present the Korean Offensive Language Dataset (KOLD) comprising 40,429 comments, which are annotated hierarchically with the type and the target of offensive language, accompanied by annotations of the corresponding text spans. We collect the comments from NAVER news and YouTube platform and provide the titles of the articles and videos as the context information for the annotation process. We use these annotated comments as training data for Korean BERT and RoBERTa models and find that they are effective at offensiveness detection, target classification, and target span detection while having room for improvement for target group classification and offensive span detection. We discover that the target group distribution differs drastically from the existing English datasets, and observe that providing the context information improves the model performance in offensiveness detection (+0.3), target classification (+1.5), and target group classification (+13.1). We publicly release the dataset and baseline models.
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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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In robotics and computer vision communities, extensive studies have been widely conducted regarding surveillance tasks, including human detection, tracking, and motion recognition with a camera. Additionally, deep learning algorithms are widely utilized in the aforementioned tasks as in other computer vision tasks. Existing public datasets are insufficient to develop learning-based methods that handle various surveillance for outdoor and extreme situations such as harsh weather and low illuminance conditions. Therefore, we introduce a new large-scale outdoor surveillance dataset named eXtremely large-scale Multi-modAl Sensor dataset (X-MAS) containing more than 500,000 image pairs and the first-person view data annotated by well-trained annotators. Moreover, a single pair contains multi-modal data (e.g. an IR image, an RGB image, a thermal image, a depth image, and a LiDAR scan). This is the first large-scale first-person view outdoor multi-modal dataset focusing on surveillance tasks to the best of our knowledge. We present an overview of the proposed dataset with statistics and present methods of exploiting our dataset with deep learning-based algorithms. The latest information on the dataset and our study are available at https://github.com/lge-robot-navi, and the dataset will be available for download through a server.
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