在这项研究中,将放射学方法扩展到用于组织分类的光学荧光分子成像数据,称为“验光”。荧光分子成像正在出现在头颈部鳞状细胞癌(HNSCC)切除期间的精确手术引导。然而,肿瘤到正常的组织对比与靶分子表皮生长因子受体(EGFR)的异质表达的内在生理局限性混淆。验光学试图通过探测荧光传达的EGFR表达中的质地模式差异来改善肿瘤识别。从荧光图像样品中提取了总共1,472个标准化的验光特征。涉及支持矢量机分类器的监督机器学习管道接受了25个顶级功能的培训,这些功能由最小冗余最大相关标准选择。通过将切除组织的图像贴片分类为组织学确认的恶性肿瘤状态,将模型预测性能与荧光强度阈值方法进行了比较。与荧光强度阈值方法相比,验光方法在所有测试集样品中提供了一致的预测准确性(无剂量)(平均精度为89%vs. 81%; P = 0.0072)。改进的性能表明,将放射线学方法扩展到荧光分子成像数据为荧光引导手术中的癌症检测提供了有希望的图像分析技术。
translated by 谷歌翻译
We present NusaCrowd, a collaborative initiative to collect and unite existing resources for Indonesian languages, including opening access to previously non-public resources. Through this initiative, we have has brought together 137 datasets and 117 standardized data loaders. The quality of the datasets has been assessed manually and automatically, and their effectiveness has been demonstrated in multiple experiments. NusaCrowd's data collection enables the creation of the first zero-shot benchmarks for natural language understanding and generation in Indonesian and its local languages. Furthermore, NusaCrowd brings the creation of the first multilingual automatic speech recognition benchmark in Indonesian and its local languages. Our work is intended to help advance natural language processing research in under-represented languages.
translated by 谷歌翻译
与LTE网络相比,5G的愿景在于提供较高的数据速率,低延迟(为了实现近实时应用程序),大大增加了基站容量以及用户的接近完美服务质量(QoS)。为了提供此类服务,5G系统将支持LTE,NR,NR-U和Wi-Fi等访问技术的各种组合。每种无线电访问技术(RAT)都提供不同类型的访问,这些访问应在用户中对其进行最佳分配和管理。除了资源管理外,5G系统还将支持双重连接服务。因此,网络的编排对于系统经理在旧式访问技术方面来说是一个更困难的问题。在本文中,我们提出了一种基于联合元学习(FML)的大鼠分配算法,该算法使RAN Intelligent Controller(RIC)能够更快地适应动态变化的环境。我们设计了一个包含LTE和5G NR服务技术的模拟环境。在模拟中,我们的目标是在传输的截止日期内满足UE需求,以提供更高的QoS值。我们将提出的算法与单个RL试剂,爬行动物算法和基于规则的启发式方法进行了比较。仿真结果表明,提出的FML方法分别在第一部部署回合21%和12%时达到了较高的缓存率。此外,在比较方法中,提出的方法最快地适应了新任务和环境。
translated by 谷歌翻译
图像回归任务,如骨矿物密度(BMD)估计和左心室喷射分数(LVEF)预测,在计算机辅助疾病评估中起重要作用。大多数深度回归方法用单一的回归损耗函数训练神经网络,如MSE或L1损耗。在本文中,我们提出了一种用于深度图像回归的第一个对比学习框架,即adacon,其包括通过新颖的自适应边缘对比损耗和回归预测分支的特征学习分支组成。我们的方法包含标签距离关系作为学习特征表示的一部分,这允许在下游回归任务中进行更好的性能。此外,它可以用作即插即用模块,以提高现有回归方法的性能。我们展示了adacon对来自X射线图像的骨矿物密度估计和来自超声心动图象的X射线图像和左心室喷射分数预测的骨矿物密度估计的有效性。 Adacon分别导致MAE在最先进的BMD估计和LVEF预测方法中相对提高3.3%和5.9%。
translated by 谷歌翻译
模型的可解释性对于许多实际应用是必不可少的,例如临床决策支持系统。在本文中,提出了一种新的可解释机学习方法,可以模拟人类理解规则中的输入变量与响应之间的关系。该方法是通过将热带几何形状应用于模糊推理系统构建的,其中通过监督学习可以发现可变编码功能和突出规则。进行了使用合成数据集的实验,以研究所提出的算法在分类和规则发现中的性能和容量。此外,将所提出的方法应用于鉴定心力衰竭患者的临床应用,这些患者将受益于心脏移植或耐用的机械循环支撑等先进的疗法。实验结果表明,该网络在分类任务方面取得了很大的表现。除了从数据集中学习人类可理解的规则外,现有的模糊域知识可以很容易地转移到网络中,并用于促进模型培训。从我们的结果,所提出的模型和学习现有领域知识的能力可以显着提高模型的概括性。所提出的网络的特征使其在需要模型可靠性和理由的应用中承诺。
translated by 谷歌翻译
In this paper, we propose a novel technique, namely INVALIDATOR, to automatically assess the correctness of APR-generated patches via semantic and syntactic reasoning. INVALIDATOR reasons about program semantic via program invariants while it also captures program syntax via language semantic learned from large code corpus using the pre-trained language model. Given a buggy program and the developer-patched program, INVALIDATOR infers likely invariants on both programs. Then, INVALIDATOR determines that a APR-generated patch overfits if: (1) it violates correct specifications or (2) maintains errors behaviors of the original buggy program. In case our approach fails to determine an overfitting patch based on invariants, INVALIDATOR utilizes a trained model from labeled patches to assess patch correctness based on program syntax. The benefit of INVALIDATOR is three-fold. First, INVALIDATOR is able to leverage both semantic and syntactic reasoning to enhance its discriminant capability. Second, INVALIDATOR does not require new test cases to be generated but instead only relies on the current test suite and uses invariant inference to generalize the behaviors of a program. Third, INVALIDATOR is fully automated. We have conducted our experiments on a dataset of 885 patches generated on real-world programs in Defects4J. Experiment results show that INVALIDATOR correctly classified 79% overfitting patches, accounting for 23% more overfitting patches being detected by the best baseline. INVALIDATOR also substantially outperforms the best baselines by 14% and 19% in terms of Accuracy and F-Measure, respectively.
translated by 谷歌翻译
When robots learn reward functions using high capacity models that take raw state directly as input, they need to both learn a representation for what matters in the task -- the task ``features" -- as well as how to combine these features into a single objective. If they try to do both at once from input designed to teach the full reward function, it is easy to end up with a representation that contains spurious correlations in the data, which fails to generalize to new settings. Instead, our ultimate goal is to enable robots to identify and isolate the causal features that people actually care about and use when they represent states and behavior. Our idea is that we can tune into this representation by asking users what behaviors they consider similar: behaviors will be similar if the features that matter are similar, even if low-level behavior is different; conversely, behaviors will be different if even one of the features that matter differs. This, in turn, is what enables the robot to disambiguate between what needs to go into the representation versus what is spurious, as well as what aspects of behavior can be compressed together versus not. The notion of learning representations based on similarity has a nice parallel in contrastive learning, a self-supervised representation learning technique that maps visually similar data points to similar embeddings, where similarity is defined by a designer through data augmentation heuristics. By contrast, in order to learn the representations that people use, so we can learn their preferences and objectives, we use their definition of similarity. In simulation as well as in a user study, we show that learning through such similarity queries leads to representations that, while far from perfect, are indeed more generalizable than self-supervised and task-input alternatives.
translated by 谷歌翻译
The latent space of autoencoders has been improved for clustering image data by jointly learning a t-distributed embedding with a clustering algorithm inspired by the neighborhood embedding concept proposed for data visualization. However, multivariate tabular data pose different challenges in representation learning than image data, where traditional machine learning is often superior to deep tabular data learning. In this paper, we address the challenges of learning tabular data in contrast to image data and present a novel Gaussian Cluster Embedding in Autoencoder Latent Space (G-CEALS) algorithm by replacing t-distributions with multivariate Gaussian clusters. Unlike current methods, the proposed approach independently defines the Gaussian embedding and the target cluster distribution to accommodate any clustering algorithm in representation learning. A trained G-CEALS model extracts a quality embedding for unseen test data. Based on the embedding clustering accuracy, the average rank of the proposed G-CEALS method is 1.4 (0.7), which is superior to all eight baseline clustering and cluster embedding methods on seven tabular data sets. This paper shows one of the first algorithms to jointly learn embedding and clustering to improve multivariate tabular data representation in downstream clustering.
translated by 谷歌翻译
An unbiased scene graph generation (SGG) algorithm referred to as Skew Class-balanced Re-weighting (SCR) is proposed for considering the unbiased predicate prediction caused by the long-tailed distribution. The prior works focus mainly on alleviating the deteriorating performances of the minority predicate predictions, showing drastic dropping recall scores, i.e., losing the majority predicate performances. It has not yet correctly analyzed the trade-off between majority and minority predicate performances in the limited SGG datasets. In this paper, to alleviate the issue, the Skew Class-balanced Re-weighting (SCR) loss function is considered for the unbiased SGG models. Leveraged by the skewness of biased predicate predictions, the SCR estimates the target predicate weight coefficient and then re-weights more to the biased predicates for better trading-off between the majority predicates and the minority ones. Extensive experiments conducted on the standard Visual Genome dataset and Open Image V4 \& V6 show the performances and generality of the SCR with the traditional SGG models.
translated by 谷歌翻译
In this paper we discuss the theory used in the design of an open source lightmorphic signatures analysis toolkit (LSAT). In addition to providing a core functionality, the software package enables specific optimizations with its modular and customizable design. To promote its usage and inspire future contributions, LSAT is publicly available. By using a self-supervised neural network and augmented machine learning algorithms, LSAT provides an easy-to-use interface with ample documentation. The experiments demonstrate that LSAT improves the otherwise tedious and error-prone tasks of translating lightmorphic associated data into usable spectrograms, enhanced with parameter tuning and performance analysis. With the provided mathematical functions, LSAT validates the nonlinearity encountered in the data conversion process while ensuring suitability of the forecasting algorithms.
translated by 谷歌翻译