本文提出了我们为在葡萄牙语中自发和准备的语音和语音情感识别的共享任务自动语音识别(SE&R 2022)的共同任务自动语音识别的努力。挑战的目的是考虑葡萄牙语的ASR研究,考虑到不同方言的准备和自发语音。我们的方法包括在域特异性方法中微调ASR模型,应用增益归一化和选择性噪声插入。提出的方法比可用的4个曲目中的3个曲目中提供的强大基线改进了
translated by 谷歌翻译
Recently, there has been an interest in improving the resources available in Intrusion Detection System (IDS) techniques. In this sense, several studies related to cybersecurity show that the environment invasions and information kidnapping are increasingly recurrent and complex. The criticality of the business involving operations in an environment using computing resources does not allow the vulnerability of the information. Cybersecurity has taken on a dimension within the universe of indispensable technology in corporations, and the prevention of risks of invasions into the environment is dealt with daily by Security teams. Thus, the main objective of the study was to investigate the Ensemble Learning technique using the Stacking method, supported by the Support Vector Machine (SVM) and k-Nearest Neighbour (kNN) algorithms aiming at an optimization of the results for DDoS attack detection. For this, the Intrusion Detection System concept was used with the application of the Data Mining and Machine Learning Orange tool to obtain better results
translated by 谷歌翻译
Machine Learning algorithms have been extensively researched throughout the last decade, leading to unprecedented advances in a broad range of applications, such as image classification and reconstruction, object recognition, and text categorization. Nonetheless, most Machine Learning algorithms are trained via derivative-based optimizers, such as the Stochastic Gradient Descent, leading to possible local optimum entrapments and inhibiting them from achieving proper performances. A bio-inspired alternative to traditional optimization techniques, denoted as meta-heuristic, has received significant attention due to its simplicity and ability to avoid local optimums imprisonment. In this work, we propose to use meta-heuristic techniques to fine-tune pre-trained weights, exploring additional regions of the search space, and improving their effectiveness. The experimental evaluation comprises two classification tasks (image and text) and is assessed under four literature datasets. Experimental results show nature-inspired algorithms' capacity in exploring the neighborhood of pre-trained weights, achieving superior results than their counterpart pre-trained architectures. Additionally, a thorough analysis of distinct architectures, such as Multi-Layer Perceptron and Recurrent Neural Networks, attempts to visualize and provide more precise insights into the most critical weights to be fine-tuned in the learning process.
translated by 谷歌翻译
健壮的学习是科学机器学习(SCIML)的重要问题。文献中有几篇关于该主题的作品。但是,对方法的需求不断增加,可以同时考虑SCIML模型识别中涉及的所有不同不确定性组成部分。因此,这项工作提出了一种对SCIML的不确定性评估的综合方法,该方法还考虑了识别过程中涉及的几种不确定性来源。提出的方法中考虑的不确定性是缺乏理论和因果模型,对数据腐败或不完美的敏感性以及计算工作。因此,可以为SCIML领域中的不确定性感知模型提供总体策略。该方法通过案例研究验证,开发了用于聚合反应器的软传感器。结果表明,已识别的软传感器对于不确定性是可靠的,并以所提出的方法的一致性证实。
translated by 谷歌翻译
本文介绍了一种基于变压器深度学习模型为视频游戏生成音乐的体系结构。该系统按照设计视频游戏音乐目前使用的标准分层策略来生成各种层的音乐。根据唤醒现象模型,音乐对玩家的心理环境具有适应性。我们的动机是根据玩家的口味自定义音乐,他们可以通过一系列音乐示例选择他喜欢的音乐风格。我们讨论了未来的当前局限性和前景,例如对音乐组件的协作和互动控制。
translated by 谷歌翻译
通常,基于生物谱系的控制系统可能不依赖于各个预期行为或合作适当运行。相反,这种系统应该了解未经授权的访问尝试的恶意程序。文献中提供的一些作品建议通过步态识别方法来解决问题。这些方法旨在通过内在的可察觉功能来识别人类,尽管穿着衣服或配件。虽然该问题表示相对长时间的挑战,但是为处理问题的大多数技术存在与特征提取和低分类率相关的几个缺点,以及其他问题。然而,最近的深度学习方法是一种强大的一组工具,可以处理几乎任何图像和计算机视觉相关问题,为步态识别提供最重要的结果。因此,这项工作提供了通过步态认可的关于生物识别检测的最近作品的调查汇编,重点是深入学习方法,强调他们的益处,暴露出弱点。此外,它还呈现用于解决相关约束的数据集,方法和体系结构的分类和表征描述。
translated by 谷歌翻译
本文通过研究阶段转换的$ Q $State Potts模型,通过许多无监督的机器学习技术,即主成分分析(PCA),$ K $ - 梅尔集群,统一歧管近似和投影(UMAP),和拓扑数据分析(TDA)。即使在所有情况下,我们都能够检索正确的临界温度$ t_c(q)$,以$ q = 3,4 $和5 $,结果表明,作为UMAP和TDA的非线性方法依赖于有限尺寸效果,同时仍然能够区分第一和二阶相转换。该研究可以被认为是在研究相转变的调查中使用不同无监督的机器学习算法的基准。
translated by 谷歌翻译
对于网络入侵检测系统(NIDS)使用机器学习(ML)的大多数研究都使用良好的数据集,例如KDD-CUP99,NSL-KDD,UNSW-NB15和Cicids-2017。在这种情况下,探讨了机器学习技术的可能性,旨在与已发表的基线(以模型为中心的方法)相比的度量改进。但是,这些数据集将一些限制呈现为老化,使得将基于ML的解决方案转换为现实世界的应用程序,这使得它不可行。本文提出了一种系统以系统为中心的方法来解决NIDS研究的当前限制,特别是数据集。此方法生成由最近的网络流量和攻击组成的NID数据集,其中包含设计的标签过程。
translated by 谷歌翻译
Learning with noisy-labels has become an important research topic in computer vision where state-of-the-art (SOTA) methods explore: 1) prediction disagreement with co-teaching strategy that updates two models when they disagree on the prediction of training samples; and 2) sample selection to divide the training set into clean and noisy sets based on small training loss. However, the quick convergence of co-teaching models to select the same clean subsets combined with relatively fast overfitting of noisy labels may induce the wrong selection of noisy label samples as clean, leading to an inevitable confirmation bias that damages accuracy. In this paper, we introduce our noisy-label learning approach, called Asymmetric Co-teaching (AsyCo), which introduces novel prediction disagreement that produces more consistent divergent results of the co-teaching models, and a new sample selection approach that does not require small-loss assumption to enable a better robustness to confirmation bias than previous methods. More specifically, the new prediction disagreement is achieved with the use of different training strategies, where one model is trained with multi-class learning and the other with multi-label learning. Also, the new sample selection is based on multi-view consensus, which uses the label views from training labels and model predictions to divide the training set into clean and noisy for training the multi-class model and to re-label the training samples with multiple top-ranked labels for training the multi-label model. Extensive experiments on synthetic and real-world noisy-label datasets show that AsyCo improves over current SOTA methods.
translated by 谷歌翻译
Traditionally, data analysis and theory have been viewed as separate disciplines, each feeding into fundamentally different types of models. Modern deep learning technology is beginning to unify these two disciplines and will produce a new class of predictively powerful space weather models that combine the physical insights gained by data and theory. We call on NASA to invest in the research and infrastructure necessary for the heliophysics' community to take advantage of these advances.
translated by 谷歌翻译