arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.13809q-bio.GNcs.LGstat.ML
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相关高维RNA测序癌症数据的集成特征选择分析

Analysis of ensemble feature selection for correlated high-dimensional RNA-Seq cancer data

University of Białystok(比亚韦斯托克大学);University of Warsaw(华沙大学)

Aneta Polewko-Klim, Witold R. Rudnicki

摘要:

发现诊断和预后的分子标志物是重要的,并积极追求在癌症研究领域。对于复杂的疾病,这个过程通常使用机器学习来执行。目前的研究比较了两种方法发现相关变量:通过应用单一的功能选择算法,与不同的算法的合奏。这些方法用于使用来自癌症基因组图谱的RNA测序谱来识别与四种癌症类型的相关辨别的变量。比较是在两个方向进行的:评估模型的预测性能和监测选定的变量的稳定性。使用四个特征选择算法,即U-检验,ReliefF,和MDFS算法的两个变体来识别最具信息量的特征。使用随机森林算法进行正常和肿瘤组织的区分。当使用U检验时,特征集的稳定性最高。不幸的是,建立在从特征选择算法的集合获得的特征集上的模型并不比建立在从单个算法获得的特征集上的模型更好。另一方面,导致最佳分类结果的特征选择器在数据集之间变化。

英文摘要:

Discovery of diagnostic and prognostic molecular markers is important and actively pursued the research field in cancer research. For complex diseases, this process is often performed using Machine Learning. The current study compares two approaches for the discovery of relevant variables: by application of a single feature selection algorithm, versus by an ensemble of diverse algorithms. These approaches are used to identify variables that are relevant discerning of four cancer types using RNA-seq profiles from the Cancer Genome Atlas. The comparison is carried out in two directions: evaluating the predictive performance of models and monitoring the stability of selected variables. The most informative features are identified using a four feature selection algorithms, namely U-test, ReliefF, and two variants of the MDFS algorithm. Discerning normal and tumor tissues is performed using the Random Forest algorithm. The highest stability of the feature set was obtained when U-test was used. Unfortunately, models built on feature sets obtained from the ensemble of feature selection algorithms were no better than for models developed on feature sets obtained from individual algorithms. On the other hand, the feature selectors leading to the best classification results varied between data sets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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