RF

RF
  • 文章类型: Journal Article
    肺癌是世界上最致命和最具侵袭性的恶性肿瘤。预防癌症至关重要。因此,新的分子靶点为肺癌的分子诊断和靶向治疗奠定了基础。PLA2G1B在脂质代谢和炎症中起关键作用。PLA2G1B具有选择性底物特异性。在本文中,研究了PLA2G1B的重组蛋白分子结构,并设计了新的治疗干预措施,通过靶向PLA2G1B结构中的特定区域或残基来破坏PLA2G1B活性并阻止肿瘤生长.使用R的“STRING”程序构建蛋白质-蛋白质相互作用网络和核心基因。拉索,SVM-RFE和RF算法确定了与肺癌相关的重要基因。鉴定了282度。富集分析表明,这些基因主要与粘附和神经活性配体-受体相互作用途径有关。PLA2G1B随后被确定为具有预防性特征。GSEA显示PLA2G1B与α-亚麻酸代谢密切相关。通过对LASSO的分析,SVM-RFE和RF算法,我们发现PLA2G1B基因可能是肺癌的预防基因。
    Lung cancer is the deadliest and most aggressive malignancy in the world. Preventing cancer is crucial. Therefore, the new molecular targets have laid the foundation for molecular diagnosis and targeted therapy of lung cancer. PLA2G1B plays a key role in lipid metabolism and inflammation. PLA2G1B has selective substrate specificity. In this paper, the recombinant protein molecular structure of PLA2G1B was studied and novel therapeutic interventions were designed to disrupt PLA2G1B activity and impede tumor growth by targeting specific regions or residues in its structure. Construct protein-protein interaction networks and core genes using R\'s \"STRING\" program. LASSO, SVM-RFE and RF algorithms identified important genes associated with lung cancer. 282 deg were identified. Enrichment analysis showed that these genes were mainly related to adhesion and neuroactive ligand-receptor interaction pathways. PLA2G1B was subsequently identified as developing a preventative feature. GSEA showed that PLA2G1B is closely related to α-linolenic acid metabolism. Through the analysis of LASSO, SVM-RFE and RF algorithms, we found that PLA2G1B gene may be a preventive gene for lung cancer.
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  • 文章类型: Journal Article
    LST的准确检索对于理解和减轻城市热岛的影响至关重要,并最终解决全球变暖这一更广泛的挑战。这项研究强调了单日卫星图像对于大规模LST检索的重要性。它探讨了表面参数的光谱指数的影响,使用机器学习算法来提高准确性。该研究提出了一种在一天内捕获卫星数据的新方法,以减少LST估计中的不确定性。昌迪加尔市使用极端梯度提升(XGBoost)的案例研究,轻型梯度增压机,和随机森林(RF)揭示了RF在夏季和冬季的LST估计中的优越性能。在夏季(0.93)和冬季(0.85),所有ML模型的R平方均高于0.8,RF的R平方略高。在这些发现的基础上,这项研究将重点扩展到了Ranchi,在捕获LST变化时,展示了RF的鲁棒性和令人印象深刻的准确性。这项研究有助于弥合大规模LST估计方法中的现有差距,为其在理解地球动态系统方面的各种应用提供有价值的见解。
    Accurate retrieval of LST is crucial for understanding and mitigating the effects of urban heat islands, and ultimately addressing the broader challenge of global warming. This study emphasizes the importance of a single day satellite imageries for large-scale LST retrieval. It explores the impact of Spectral indices of the surface parameters, using machine learning algorithms to enhance accuracy. The research proposes a novel approach of capturing satellite data on a single day to reduce uncertainties in LST estimations. A case study over Chandigarh city using Extreme Gradient Boosting (XGBoost), Light Gradient Boosting Machine, and Random Forest (RF) reveals RF\'s superior performance in LST estimations during both summer and winter seasons. All the ML models gave an R-square of above 0.8 and RF with slightly higher R-square during both summer (0.93) and winter (0.85). Building on these findings, the study extends its focus to Ranchi, demonstrating RF\'s robustness with impressive accuracy in capturing LST variations. The research contributes to bridging existing gaps in large-scale LST estimation methodologies, offering valuable insights for its diverse applications in understanding Earth\'s dynamic systems.
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  • 文章类型: Journal Article
    骨关节炎(OA)引起普遍的慢性疾病,以整个关节的广泛参与为标志。长期的低度滑膜炎症是关节内一系列病理改变的关键诱因。
    该研究旨在探索OA的潜在治疗靶点并研究相关的机制途径。
    从全基因组关联研究(GWAS)数据库下载OA的摘要级数据,表达数量性状基因座(eQTL)数据是从eQTLGen联盟获得的,从GEO数据库获得OA的滑膜芯片数据。在数据整合和随后的孟德尔随机化分析之后,差异分析,和加权基因共表达网络分析(WGCNA)分析,指出了与OA性状具有显着因果关系的核心基因。随后,通过采用三种机器学习算法,进一步鉴定了OA复杂性的基因靶标。此外,建立相应的ROC曲线和列线图模型,用于评估患者的临床预后。最后,免疫印迹分析和ELISA方法用于标记基因及其连接途径的初步验证。
    获得了与OA性状有显著因果关系的22个核心基因。通过不同机器学习算法的应用,MAT2A和RBM6作为诊断标记基因出现。ROC曲线和列线图模型用于评估两种鉴定的与OA相关的标记基因在诊断中的有效性。MAT2A控制滑膜细胞内SAM的合成,从而阻止TGF-β1激活Smad3/4信号通路诱导的滑膜纤维化。
    这项研究提出了MAT2A和RBM6作为OA的可靠诊断的第一个证据。MAT2A,通过参与调节SAM的合成,抑制TGF-β1诱导的Smad3/4信号通路的激活,从而有效地避免滑膜纤维化的可能性。同时,预后风险模型的发展有助于早期OA诊断,功能恢复评估,并为进一步的治疗提供了方向。
    UNASSIGNED: Osteoarthritis (OA) entails a prevalent chronic ailment, marked by the widespread involvement of entire joints. Prolonged low-grade synovial inflammation serves as the key instigator for a cascade of pathological alterations in the joints.
    UNASSIGNED: The study seeks to explore potential therapeutic targets for OA and investigate the associated mechanistic pathways.
    UNASSIGNED: Summary-level data for OA were downloaded from the genome-wide association studies (GWAS) database, expression quantitative trait loci (eQTL) data were acquired from the eQTLGen consortium, and synovial chip data for OA were obtained from the GEO database. Following the integration of data and subsequent Mendelian randomization analysis, differential analysis, and weighted gene co-expression network analysis (WGCNA) analysis, core genes that exhibit a significant causal relationship with OA traits were pinpointed. Subsequently, by employing three machine learning algorithms, additional identification of gene targets for the complexity of OA was achieved. Additionally, corresponding ROC curves and nomogram models were established for the assessment of clinical prognosis in patients. Finally, western blotting analysis and ELISA methodology were employed for the initial validation of marker genes and their linked pathways.
    UNASSIGNED: Twenty-two core genes with a significant causal relationship to OA traits were obtained. Through the application of distinct machine learning algorithms, MAT2A and RBM6 emerged as diagnostic marker genes. ROC curves and nomogram models were utilized for evaluating both the effectiveness of the two identified marker genes associated with OA in diagnosis. MAT2A governs the synthesis of SAM within synovial cells, thereby thwarting synovial fibrosis induced by the TGF-β1-activated Smad3/4 signaling pathway.
    UNASSIGNED: The first evidence that MAT2A and RBM6 serve as robust diagnostic for OA is presented in this study. MAT2A, through its involvement in regulating the synthesis of SAM, inhibits the activation of the TGF-β1-induced Smad3/4 signaling pathway, thereby effectively averting the possibility of synovial fibrosis. Concurrently, the development of a prognostic risk model facilitates early OA diagnosis, functional recovery evaluation, and offers direction for further therapy.
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  • 文章类型: Case Reports
    多发性骨髓瘤(MM)是一种恶性浆细胞增殖产生大量单克隆免疫球蛋白。典型的MM症状包括贫血,骨痛,高钙血症,和肾衰竭。文献中很少报道像关节受累这样的非典型表现,可能会导致治疗和不良结局的严重延误。
    作者报告了一例54岁女性患者,表现为对称性多关节炎,误诊为类风湿性关节炎。MM的诊断是在许多类风湿性关节炎治疗失败后以及进一步的实验室测试和程序后做出的。
    MM的这种罕见表现带来了诊断挑战,并导致治疗此类患者的明显延迟。这里,作者报告了这种不寻常的初始演示,并回顾了描述类似演示的文献中的几个案例.
    UNASSIGNED: Multiple myeloma (MM) is a malignant plasma cell proliferation producing large numbers of monoclonal immunoglobulins. Typical MM symptoms include anemia, bone pain, hypercalcemia, and renal failure. Atypical presentations like joint involvement were rarely reported in the literature and may cause significant delays in treatment and adverse outcomes.
    UNASSIGNED: The authors report a case of a 54-year-old female who presented with symmetrical polyarthritis and was misdiagnosed with rheumatoid arthritis. The diagnosis of MM was made after failing many treatments of rheumatoid arthritis and with further laboratory tests and procedures.
    UNASSIGNED: This rare manifestation of MM carries a diagnostic challenge and causes a significant delay in treating such patients. Here, the authors report this unusual initial presentation with a review of several cases in the literature describing similar presentations.
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  • 文章类型: Journal Article
    背景:Taraxacumkok-saghyzRodin(TKS)是天然橡胶(NR)的高度潜在来源,适应性强,以及机械化种植和收获的适用性。然而,当前检测NR含量的方法相对繁琐,需要开发快速检测模型。本研究利用近红外光谱技术建立了TKS根段和粉末样品中NR含量的快速检测模型。使用一年内不同生长阶段的K445菌株和与蒲公英杂交的129个TKS样品获得其近红外光谱数据。采用碱沸法检测样品根部的橡胶含量。采用蒙特卡罗抽样方法(MCS)对TKS和粉末样本的根段进行异常数据过滤,分别。使用SPXY算法以3:1的比率划分训练集和验证集。使用移动窗口平滑(MWS)对原始光谱进行预处理,标准归一化变量(SNV),乘法散射校正(MSC),和一阶导数(FD)算法。采用竞争自适应重加权采样(CARS)算法和NR相应的化学特征波段进行波段筛选。偏最小二乘(PLS),随机森林(RF),轻量级梯度增强机(LightGBM),采用卷积神经网络(CNN)算法,针对全波段,CARS算法,和对应于NR的化学特征带。确定了对于高橡胶含量区间(橡胶含量>15%)具有最佳预测性能的模型。
    结果:结果表明,TKS根段和粉末样品的最佳橡胶含量预测模型为MWS-FDCASR-RF和MWS-FD化学特征带RF,分别。他们各自的RP2,RMSEP,RPDP值为0.951、0.979、1.814、1.133、4.498和6.845。在高橡胶含量范围内,基于LightGBM算法的模型具有最佳的预测性能,根段和粉末样品的RMSEP分别为0.752和0.918。
    结论:这项研究表明,干燥的TKS根粉样品比分段样品更适合构建橡胶含量预测模型,根粉样品的预测能力优于根分段样品。特别是在升高的橡胶含量范围内,使用LightGBM算法制定的模型具有优越的预测性能,为未来TKS内容的快速检测技术提供了理论依据。
    BACKGROUND: Taraxacum kok-saghyz Rodin (TKS) is a highly potential source of natural rubber (NR) due to its wide range of suitable planting areas, strong adaptability, and suitability for mechanized planting and harvesting. However, current methods for detecting NR content are relatively cumbersome, necessitating the development of a rapid detection model. This study used near-infrared spectroscopy technology to establish a rapid detection model for NR content in TKS root segments and powder samples. The K445 strain at different growth stages within a year and 129 TKS samples hybridized with dandelion were used to obtain their near-infrared spectral data. The rubber content in the root of the samples was detected using the alkaline boiling method. The Monte Carlo sampling method (MCS) was used to filter abnormal data from the root segments of TKS and powder samples, respectively. The SPXY algorithm was used to divide the training set and validation set in a 3:1 ratio. The original spectrum was preprocessed using moving window smoothing (MWS), standard normalized variate (SNV), multiplicative scatter correction (MSC), and first derivative (FD) algorithms. The competitive adaptive reweighted sampling (CARS) algorithm and the corresponding chemical characteristic bands of NR were used to screen the bands. Partial least squares (PLS), random forest (RF), Lightweight gradient augmentation machine (LightGBM), and convolutional neural network (CNN) algorithms were employed to establish a model using the optimal spectral processing method for three different bands: full band, CARS algorithm, and chemical characteristic bands corresponding to NR. The model with the best predictive performance for high rubber content intervals (rubber content > 15%) was identified.
    RESULTS: The results indicated that the optimal rubber content prediction models for TKS root segments and powder samples were MWS-FD CASR-RF and MWS-FD chemical characteristic band RF, respectively. Their respective R P 2 , RMSEP, and RPDP values were 0.951, 0.979, 1.814, 1.133, 4.498, and 6.845. In the high rubber content range, the model based on the LightGBM algorithm had the best prediction performance, with the RMSEP of the root segments and powder samples being 0.752 and 0.918, respectively.
    CONCLUSIONS: This research indicates that dried TKS root powder samples are more appropriate for constructing a rubber content prediction model than segmented samples, and the predictive capability of root powder samples is superior to that of root segmented samples. Especially in the elevated rubber content range, the model formulated using the LightGBM algorithm has superior predictive performance, which could offer a theoretical basis for the rapid detection technology of TKS content in the future.
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  • 文章类型: Journal Article
    创伤性脑损伤(TBI)是年轻人死亡的主要原因,并且以其高死亡率和高发病率而闻名。本文旨在预测TBI患者的24h生存率。
    本次分析共涉及1224个样品,涉及的临床指标包括年龄,性别,血压,MGAP和其他字段,其中目标变量是“结果”,这是一个二进制变量。本文主要涉及的方法包括数据可视化分析,单因素分析,特征工程分析,随机森林模型(RF),K-近邻(KNN)模型,等等。Logistic回归模型(LR)和深度神经网络模型(DNN)。我们将使用SMOTE方法对训练集进行过采样,因为样本本身的标记非常不平衡。
    尽管所有模型的准确性都很高,召回率相对较低。性能最好的DNN模型仅达到0.17,对应的AUC为0.80。重新采样后,我们发现所有模型的阳性样本的召回率都提高了很多,但一些模型的AUC有所下降。最后,最优模型是LR,其阳性样本召回率为0.67,AUC为0.82。
    通过重采样,我们得到了最好的模型是射频模型,其召回率和AUC最好,且AUC水平约为0.87,说明模型的精度表现仍较好。
    UNASSIGNED: Traumatic brain injury (TBI) is the major reason for the death of young people and is well known for its high mortality and morbidity. This paper aim to predict the 24h survival of patients with TBI.
    UNASSIGNED: A total of 1224 samples were involved in this analysis, and the clinical indicators involved included age, gender, blood pressure, MGAP and other fields, among which the target variable was \"outcome\", which was a binary variable. The methods mainly involved in this paper include data visualization analysis, single factor analysis, feature engineering analysis, random forest model (RF), K-Nearst Neighbors (KNN) model, and so on. Logistic regression model (LR) and deep neural network model (DNN). We will oversample the training set using the SMOTE method because of the very unbalanced labeling of the sample itself.
    UNASSIGNED: Although the accuracy of all models is very high, the recall rate is relatively low. The DNN model with the best performance only reaches 0.17, and the corresponding AUC is 0.80. After resampling, we find that the recall rate of positive samples of all models has increased a lot, but the AUC of some models has decreased. Finally, the optimal model is LR, whose positive sample recall rate is 0.67 and AUC is 0.82.
    UNASSIGNED: Through resampling, we obtained that the best model is the RF model, whose recall rate and AUC are the best, and the AUC level is about 0.87, indicating that the accuracy performance of the model is still good.
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  • 文章类型: Journal Article
    目的:类风湿性关节炎[RA)是一种慢性炎症性疾病,具有潜在的关节外表现(ExRA)。在早期RA开始队列中评估了ExRA的发生率和诱发因素以及死亡率。
    方法:患者(n=1468;69%女性,在诊断日期连续纳入平均年龄(SD)57.3(16.3)岁),1996年1月1日至2016年12月31日,并进行前瞻性评估。2016年12月,通过患者问卷调查和病历审查评估了ExRA的发展。比较了5年之间以及2001年1月1日之前和之后的患者之间的累积发病率和发病率。Cox比例风险回归模型用于确定ExRA的预测因子,并以ExRA作为时间依赖变量进行模型估计死亡率。
    结果:在平均(SD)9.3(4.9)年的随访后,238例(23.3%)患有ExRA,151例(14.7%)患有无类风湿结节的ExRA。大多数ExRA在诊断后5年内发展。类风湿结节(10.5%)和干燥性角膜结膜炎(7.1%)是最常见的表现,其次是肺纤维化(6.1%)。最近诊断的患者中的ExRA发生率与2001年之前诊断的患者中的发生率相似。血清阳性,吸烟和早期生物治疗与ExRA的发生有关.15年后,20%的人经历了ExRA。ExRA与死亡率增加有关,HR3.029(95%CI2.177-4.213)。
    结论:ExRA的早期发展很常见,特别是类风湿结节。诱发因素是年龄,射频阳性,吸烟和早期生物治疗。ExRA患者的死亡率增加了3倍。
    OBJECTIVE: Rheumatoid arthritis [RA) is a chronic inflammatory disease, with potential for extra-articular manifestations (ExRA). The incidence and predisposing factors for ExRA and the mortality were evaluated in an early RA inception cohort.
    METHODS: Patients (n = 1468; 69 % females, mean age (SD) 57.3(16.3) years) were consecutively included at the date of diagnosis, between 1 January 1996 and 31 December 2016, and assessed prospectively. In December 2016 development of ExRA was evaluated by a patient questionnaire and a review of medical records. Cumulative incidence and incidence rates were compared between 5-year periods and between patients included before and after 1 January 2001. Cox proportional hazard regression models were used to identify predictors for ExRA, and models with ExRA as time-dependent variables to estimate the mortality.
    RESULTS: After a mean (SD) follow-up of 9.3(4.9) years, 238 cases (23.3 %) had ExRA and 151 (14.7 %) had ExRA without rheumatoid nodules. Most ExRA developed within 5 years from diagnosis. Rheumatoid nodules (10.5 %) and keratoconjunctivitis sicca (7.1 %) were the most frequent manifestations, followed by pulmonary fibrosis (6.1 %). The ExRA incidence among more recently diagnosed patients was similar as to the incidence among patients diagnosed before 2001. Seropositivity, smoking and early biological treatment were associated with development of ExRA. After 15 years 20 % had experienced ExRA. ExRA was associated with increased mortality, HR 3.029 (95 % CI 2.177-4.213).
    CONCLUSIONS: Early development of ExRA is frequent, particularly rheumatoid nodules. Predisposing factors were age, RF positivity, smoking and early biological treatment. The patients with ExRA had a 3-fold increase in mortality.
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  • 文章类型: Journal Article
    单斜半导体β-Ga2O3引起了人们的注意,特别是因为它的薄膜可以通过从块状晶体的机械剥离来实现,这类似于范德华材料的行为。对于具有剥离的β-Ga2O3的晶体管器件,对于平面内电子传输,沟道方向变为[010],在源极/漏极(S/D)接触附近变为垂直[100]。因此,各向异性输运行为当然值得研究,但很少报道。在这里,我们通过射频传输线方法(RF-TLM)从具有各种厚度的Pt/β-Ga2O3肖特基二极管获得了4.18cm2/(Vs)的垂直[100]方向电子迁移率,这是最近开发的。比接触电阻率(ρc)也可以从RF-TLM估计,为4.72×10-5Ωcm2,与常规TLM的值(5.25×10-5Ωcm2)非常相似,证明了RF-TLM的有效性。我们还制造了金属半导体场效应晶体管(MESFET)来研究各向异性传输行为和接触电阻(RC)。无RC[010]面内迁移率最高可达67cm2/(Vs),从MESFET中的总电阻中提取。
    Monoclinic semiconducting β-Ga2O3 has drawn attention, particularly because its thin film could be achieved via mechanical exfoliation from bulk crystals, which is analogous to van der Waals materials\' behavior. For the transistor devices with exfoliated β-Ga2O3, the channel direction becomes [010] for in-plane electron transport, which changes to vertical [100] near the source/drain (S/D) contact. Hence, anisotropic transport behavior is certainly worth to study but rarely reported. Here we achieve the vertical [100] direction electron mobility of 4.18 cm2/(V s) from Pt/β-Ga2O3 Schottky diodes with various thickness via radio frequency-transmission line method (RF-TLM), which is recently developed. The specific contact resistivity (ρc) could also be estimated from RF-TLM, to be 4.72 × 10-5 Ω cm2, which is quite similar to the value (5.25 × 10-5 Ω cm2) from conventional TLM proving the validity of RF-TLM. We also fabricate metal-semiconductor field-effect transistors (MESFETs) to study anisotropic transport behavior and contact resistance (RC). RC-free [010] in-plane mobility appears as high as maximum ∼67 cm2/(V s), extracted from total resistance in MESFETs.
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  • 文章类型: Journal Article
    Aurora-A(AURKA)是丝氨酸/苏氨酸蛋白激酶,参与许多细胞分裂过程的调节。许多研究表明,AURKA与癌症之间有很强的关联。AURKA在许多癌症中过度表达,如结肠,乳腺癌和前列腺癌。因此,AURKA已成为癌症管理中治疗干预的有希望的目标。在这里,我们描述了发现新型抗AURKA抑制导联的计算工作流程,从基于配体的六组抑制剂药效空间评估开始.随后,机器学习/QSAR建模与遗传算法相结合,以搜索机器学习器的最佳可能组合,基于配体的药效基团和分子描述符能够解释在所收集的抑制剂列表内抗AURKA生物活性的变化。两名学习者成功实现了可接受的结构/活动相关性,即,随机森林和极端梯度提升(XGBoost)。在成功的ML模型中出现了三种药效团。然后将这些用作3D搜索查询,以在国家癌症研究所数据库中挖掘新型抗AURKA引线。在体外评估了排名最高的38个命中的抗AURKA生物活性。其中,三种化合物表现出有希望的剂量反应曲线,证明实验IC50值范围从亚微摩尔到低微摩尔值。值得注意的是,这些化合物中的两种是新型的化学类型。
    Aurora-A (AURKA) is serine/threonine protein kinase involved in the regulation of numerous processes of cell division. Numerous studies have demonstrated strong association between AURKA and cancer. AURKA is overexpressed in many cancers, such as colon, breast and prostate cancers. Consequently, AURKA has emerged as promising target for therapeutic intervention in cancer management. Herein, we describe a computational workflow for the discovery of novel anti-AURKA inhibitory leads starting with ligand-based assessment of the pharmacophoric space of six diverse sets of inhibitors. Subsequently, machine learning/QSAR modeling was coupled with genetic function algorithm to search for the best possible combination of machine learner, ligand-based pharmacophore(s) and molecular descriptors capable of explaining variation in anti-AURKA bioactivities within a collected list of inhibitors. Two learners succeeded in achieving acceptable structure/activity correlations, namely, random forests and extreme gradient boosting (XGBoost). Three pharmacophores emerged in the successful ML models. These were then used as 3D search queries to mine the National Cancer Institute database for novel anti-AURKA leads. Top-ranking 38 hits were assessed in vitro for their anti-AURKA bioactivities. Among them, three compounds exhibited promising dose-response curves, demonstrating experimental IC50 values ranging from sub-micromolar to low micromolar values. Remarkably, two of these compounds are of novel chemotypes.
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  • 文章类型: Journal Article
    心律失常是心血管疾病发病率和死亡率的主要原因。便携式心电图(ECG)监测仪已经使用了数十年来监测心律失常患者。这些监测器提供心脏活动的实时数据,以识别不规则的心跳。然而,节律监测和电波检测,尤其是在12导联心电图中,这使得很难通过将ECG分析与患者的状况相关联来解释ECG分析。此外,即使是经验丰富的从业者也发现心电图分析具有挑战性。所有这些都是由于ECG读数中的噪声和噪声发生的频率。这项研究的主要目的是去除噪声和提取特征从ECG信号使用提出的无限脉冲响应(IIR)滤波器,以提高ECG的质量,非专家可以更好地理解。为此,这项研究使用了来自麻省理工学院贝丝以色列医院(MIT-BIH)数据库的ECG信号数据。这允许使用机器学习(ML)和深度学习(DL)模型轻松评估获取的数据,并将其分类为节奏。为了获得准确的结果,我们对ML分类器应用了超参数(HP)调整,对DL模型应用了微调(FT)。这项研究还检查了使用不同过滤器对心律失常的分类以及准确性的变化。因此,当评估所有模型时,没有FT的DenseNet-121实现了99%的准确度,而FT显示出更好的结果,准确率为99.97%。
    Arrhythmias are a leading cause of cardiovascular morbidity and mortality. Portable electrocardiogram (ECG) monitors have been used for decades to monitor patients with arrhythmias. These monitors provide real-time data on cardiac activity to identify irregular heartbeats. However, rhythm monitoring and wave detection, especially in the 12-lead ECG, make it difficult to interpret the ECG analysis by correlating it with the condition of the patient. Moreover, even experienced practitioners find ECG analysis challenging. All of this is due to the noise in ECG readings and the frequencies at which the noise occurs. The primary objective of this research is to remove noise and extract features from ECG signals using the proposed infinite impulse response (IIR) filter to improve ECG quality, which can be better understood by non-experts. For this purpose, this study used ECG signal data from the Massachusetts Institute of Technology Beth Israel Hospital (MIT-BIH) database. This allows the acquired data to be easily evaluated using machine learning (ML) and deep learning (DL) models and classified as rhythms. To achieve accurate results, we applied hyperparameter (HP)-tuning for ML classifiers and fine-tuning (FT) for DL models. This study also examined the categorization of arrhythmias using different filters and the changes in accuracy. As a result, when all models were evaluated, DenseNet-121 without FT achieved 99% accuracy, while FT showed better results with 99.97% accuracy.
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