寻找合适的工作和狩猎符合条件的候选人对求职和人力资源机构来说很重要。通过关于职位描述的广泛信息,员工和雇主需要帮助,以根据职位描述文本自动检测职位标题。在本文中,我们提出了用于预测作业描述文本的相关职位标题的多标签分类方法,并实现具有不同预先训练的语言模型的BI-GRU-LSTM-CNN来申请作业标题预测问题。具有多语言预先训练模型的伯特获得了开发和测试集的F1分数的最高结果,该组在开发集中为62.20%,测试集47.44%。
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在线游戏论坛对大多数游戏玩家都很受欢迎。他们用它来沟通和讨论游戏的策略,甚至结交朋友。然而,游戏论坛还包含滥用和骚扰演讲,令人不安和威胁的球员。因此,有必要自动检测和删除网络欺凌评论,以保持游戏论坛清洁和友好。我们使用从魔兽世界(WOW)和联盟(LOL)论坛(LOL)论坛和火车分类模型中收集的网络欺凌数据集,以自动检测玩家的评论是否是滥用的。结果获得了LOL论坛的82.69%的宏F1分数,并通过网络伯文数据集的毒性BERT模型为哇论坛的83.86%的宏F1分数。
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Adversarial machine learning has been both a major concern and a hot topic recently, especially with the ubiquitous use of deep neural networks in the current landscape. Adversarial attacks and defenses are usually likened to a cat-and-mouse game in which defenders and attackers evolve over the time. On one hand, the goal is to develop strong and robust deep networks that are resistant to malicious actors. On the other hand, in order to achieve that, we need to devise even stronger adversarial attacks to challenge these defense models. Most of existing attacks employs a single $\ell_p$ distance (commonly, $p\in\{1,2,\infty\}$) to define the concept of closeness and performs steepest gradient ascent w.r.t. this $p$-norm to update all pixels in an adversarial example in the same way. These $\ell_p$ attacks each has its own pros and cons; and there is no single attack that can successfully break through defense models that are robust against multiple $\ell_p$ norms simultaneously. Motivated by these observations, we come up with a natural approach: combining various $\ell_p$ gradient projections on a pixel level to achieve a joint adversarial perturbation. Specifically, we learn how to perturb each pixel to maximize the attack performance, while maintaining the overall visual imperceptibility of adversarial examples. Finally, through various experiments with standardized benchmarks, we show that our method outperforms most current strong attacks across state-of-the-art defense mechanisms, while retaining its ability to remain clean visually.
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Online Class Incremental learning (CIL) is a challenging setting in Continual Learning (CL), wherein data of new tasks arrive in incoming streams and online learning models need to handle incoming data streams without revisiting previous ones. Existing works used a single centroid adapted with incoming data streams to characterize a class. This approach possibly exposes limitations when the incoming data stream of a class is naturally multimodal. To address this issue, in this work, we first propose an online mixture model learning approach based on nice properties of the mature optimal transport theory (OT-MM). Specifically, the centroids and covariance matrices of the mixture model are adapted incrementally according to incoming data streams. The advantages are two-fold: (i) we can characterize more accurately complex data streams and (ii) by using centroids for each class produced by OT-MM, we can estimate the similarity of an unseen example to each class more reasonably when doing inference. Moreover, to combat the catastrophic forgetting in the CIL scenario, we further propose Dynamic Preservation. Particularly, after performing the dynamic preservation technique across data streams, the latent representations of the classes in the old and new tasks become more condensed themselves and more separate from each other. Together with a contraction feature extractor, this technique facilitates the model in mitigating the catastrophic forgetting. The experimental results on real-world datasets show that our proposed method can significantly outperform the current state-of-the-art baselines.
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Large language models (LLMs) have been shown to be able to perform new tasks based on a few demonstrations or natural language instructions. While these capabilities have led to widespread adoption, most LLMs are developed by resource-rich organizations and are frequently kept from the public. As a step towards democratizing this powerful technology, we present BLOOM, a 176B-parameter open-access language model designed and built thanks to a collaboration of hundreds of researchers. BLOOM is a decoder-only Transformer language model that was trained on the ROOTS corpus, a dataset comprising hundreds of sources in 46 natural and 13 programming languages (59 in total). We find that BLOOM achieves competitive performance on a wide variety of benchmarks, with stronger results after undergoing multitask prompted finetuning. To facilitate future research and applications using LLMs, we publicly release our models and code under the Responsible AI License.
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3D hand pose estimation from RGB images suffers from the difficulty of obtaining the depth information. Therefore, a great deal of attention has been spent on estimating 3D hand pose from 2D hand joints. In this paper, we leverage the advantage of spatial-temporal Graph Convolutional Neural Networks and propose LG-Hand, a powerful method for 3D hand pose estimation. Our method incorporates both spatial and temporal dependencies into a single process. We argue that kinematic information plays an important role, contributing to the performance of 3D hand pose estimation. We thereby introduce two new objective functions, Angle and Direction loss, to take the hand structure into account. While Angle loss covers locally kinematic information, Direction loss handles globally kinematic one. Our LG-Hand achieves promising results on the First-Person Hand Action Benchmark (FPHAB) dataset. We also perform an ablation study to show the efficacy of the two proposed objective functions.
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语义分割是开发医学图像诊断系统的重要任务。但是,构建注释的医疗数据集很昂贵。因此,在这种情况下,半监督方法很重要。在半监督学习中,标签的质量在模型性能中起着至关重要的作用。在这项工作中,我们提出了一种新的伪标签策略,可提高用于培训学生网络的伪标签的质量。我们遵循多阶段的半监督训练方法,该方法在标记的数据集上训练教师模型,然后使用训练有素的老师将伪标签渲染用于学生培训。通过这样做,伪标签将被更新,并且随着培训的进度更加精确。上一个和我们的方法之间的关键区别在于,我们在学生培训过程中更新教师模型。因此,在学生培训过程中,提高了伪标签的质量。我们还提出了一种简单但有效的策略,以使用动量模型来提高伪标签的质量 - 训练过程中原始模型的慢复制版本。通过应用动量模型与学生培训期间的重新渲染伪标签相结合,我们在五个数据集中平均达到了84.1%的骰子分数(即Kvarsir,CVC-ClinicdB,Etis-laribpolypdb,cvc-colondb,cvc-colondb,cvc-colondb和cvc-300)和CVC-300)只有20%的数据集用作标记数据。我们的结果超过了3%的共同实践,甚至在某些数据集中取得了完全监督的结果。我们的源代码和预培训模型可在https://github.com/sun-asterisk-research/online学习SSL上找到
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药物误解是可能导致对患者造成不可预测后果的风险之一。为了减轻这种风险,我们开发了一个自动系统,该系统可以正确识别移动图像中的药丸的处方。具体来说,我们定义了所谓的药丸匹配任务,该任务试图匹配处方药中药丸所拍摄的药丸的图像。然后,我们提出了PIMA,这是一种使用图神经网络(GNN)和对比度学习来解决目标问题的新方法。特别是,GNN用于学习处方中文本框之间的空间相关性,从而突出显示带有药丸名称的文本框。此外,采用对比度学习来促进药丸名称的文本表示与药丸图像的视觉表示之间的跨模式相似性的建模。我们进行了广泛的实验,并证明PIMA在我们构建的药丸和处方图像的现实数据集上优于基线模型。具体而言,与其他基线相比,PIMA的准确性从19.09%提高到46.95%。我们认为,我们的工作可以为建立新的临床应用并改善药物安全和患者护理提供新的机会。
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跨不同边缘设备(客户)局部数据的分布不均匀,导致模型训练缓慢,并降低了联合学习的准确性。幼稚的联合学习(FL)策略和大多数替代解决方案试图通过加权跨客户的深度学习模型来实现更多公平。这项工作介绍了在现实世界数据集中遇到的一种新颖的非IID类型,即集群键,其中客户组具有具有相似分布的本地数据,从而导致全局模型收敛到过度拟合的解决方案。为了处理非IID数据,尤其是群集串数据的数据,我们提出了FedDrl,这是一种新型的FL模型,它采用了深厚的强化学习来适应每个客户的影响因素(将用作聚合过程中的权重)。在一组联合数据集上进行了广泛的实验证实,拟议的FEDDR可以根据CIFAR-100数据集的平均平均为FedAvg和FedProx方法提高了有利的改进,例如,高达4.05%和2.17%。
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可解释的机器学习提供了有关哪些因素推动了黑盒系统的一定预测以及是否信任高风险决策或大规模部署的洞察力。现有方法主要集中于选择解释性输入功能,这些功能遵循本地添加剂或实例方法。加性模型使用启发式采样扰动来依次学习实例特定解释器。因此,该过程效率低下,并且容易受到条件较差的样品的影响。同时,实例技术直接学习本地采样分布,并可以从其他输入中利用全球信息。但是,由于严格依赖预定义的功能,他们只能解释单一级预测并在不同设置上遇到不一致的情况。这项工作利用了这两种方法的优势,并提出了一个全球框架,用于同时学习多个目标类别的本地解释。我们还提出了一种自适应推理策略,以确定特定实例的最佳功能数量。我们的模型解释器极大地超过了忠诚的添加和实例的对应物,而在各种数据集和Black-box模型体系结构上获得了高水平的简洁性。
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