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重庆大学学报 2024年

作者：苏静 murtadha ahmed 西北工业大学计算机学院

句子情感分类任务致力于挖掘文本中的情感语义，目前以基于BERT的深度网络模型表现最佳。然而这类模型的性能极度依赖于大量的高质量标注数据，而现实中标注样本往往比较稀缺，导致深度神经网络（DNN）很容易在小规模样本集上过拟合，... 详细信息

句子情感分类任务致力于挖掘文本中的情感语义，目前以基于BERT的深度网络模型表现最佳。然而这类模型的性能极度依赖于大量的高质量标注数据，而现实中标注样本往往比较稀缺，导致深度神经网络（DNN）很容易在小规模样本集上过拟合，难以准确捕捉句子的隐含情感特征。尽管现有的半监督模型有效利用了未标注样本的特征，但对引入未标注样本可能导致错误逐渐累积问题仍然没有得到有效处理。同时，半监督模型在对测试数据集进行预测后不会重新评估和修正上一次的标注结果，因此无法充分挖掘测试数据上的特征信息。为解决这些问题，本文提出了一种新型的半监督句子情感分类模型。该模型首先提出基于K-近邻算法的权重机制，为置信度高的样本分配较高的权重，以尽可能减少错误信息在模型训练过程中的传播。接着，采用了两阶段训练策略，使模型能够对测试数据中预测错误的样本进行及时修正。最后通过在多个数据集上的测试，证明了本模型即使在小规模样本集上也能获得良好的性能。

关键词：句子情感分类半监督学习 K-近邻 transformer

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Fever assessment in children under five: Are we following the guidelines?

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World Journal of Clinical Pediatrics 2024年第1期13卷 62-72页

作者： Hasan M Isa ahmed J Isa murtadha A Alnasheet Mahmood M Mansoor Department of Pediatrics Salmaniya Medical ComplexManama 26671Bahrain Department of Pediatrics Arabian Gulf UniversityManama 26671Bahrain Department of General Surgery Salmaniya Medical ComplexManama 26671Bahrain

BACKGROUND Fever is a common cause of medical consultation and hospital admission,particularly among ***,the United Kingdom’s National Institute for Health and Care Excellence(NICE)updated its guidelines for assessing fever in children under five years of *** efficient assessment and management of children with fever are crucial for improving patient *** To evaluate fever assessment in hospitalized children and to assess its adherence with the NICE Fever in under 5s *** We conducted a retrospective cohort review of the electronic medical records of children under five years of age at the Department of Pediatrics,Salmaniya Medical Complex,Bahrain,between June and July *** data,vital signs during the first 48 h of admission,route of temperature measurement,and indications for admission were *** was defined according to the NICE *** children were divided into five groups according to their age(0-3 months,>3-6 months,>6-12 months,>12-36 months,and>36-60 months).Patients with and without fever were compared in terms of demography,indication for admission,route of temperature measurement,and other vital *** with the NICE Fever in the under 5s guideline was *** compliance was defined as>95%,partial compliance as 70%-95%,and minimal compliance as≤69%.Pearson’sχ^(2),Student’s t test,the Mann-Whitney U test,and Spearman’s correlation coefficient(rs)were used for *** Of the 136 patients reviewed,80(58.8%)were *** median age at admission was 14.2[interquartile range(IQR):1.7-44.4]months,with the most common age group being 36-60 ***-six(26.4%)patients had fever,and 100(73.6%)were *** commonest age group for febrile patients(>12-36 months)was older than the commonest age group for afebrile patients(0-3 months)(P=0.027).The median weight was 8.3(IQR:4.0-13.3)*** with fever had higher weight than those without fever[10.2(IQR:7.3-13.0)vs 7

关键词： Fever Pediatrics Admission patterns Temperature measurement Guidelines Bahrain

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Application of Vortex Generators to Remove Heat Trapped in Closed Channels

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Fluid Dynamics & Materials Processing 2023年第1期19卷 15-24页

作者： Alim Al Ayub ahmed Salim Oudah Mezan Binyamin murtadha Doghiam Abdullah Elena Tesleva Linar G.Akhmetov Rustem Zalilov Mustafa M.Kadhim Abduladheem Turki Jalil School of Accounting Jiujiang UniversityJiujiang332000China General Directorate of Education in Al-Muthanna Governorate Ministry of EducationSamawah66001Iraq Department of Mechanical Engineering Faculty of Science and TechnologyUniversitas Muhammadiyah Kalimantan TimurSamarinda75124Indonesia College of Petroleum Engineering Al-Ayen UniversityThi-Qar64001Iraq National Research Tomsk Polytechnic University Tomsk634050Russia Kazan Federal University Kazan420008Russian Nosov Magnitogorsk State Technical University Magnitogorsk455000Russia Department of Dentistry Kut University CollegeKutWasit52001Iraq College of Technical Engineering The Islamic UniversityNajaf7003Iraq Department of Pharmacy OsolAldeen University CollegeBaghdad993P+PWXIraq Faculty of Biology and Ecology Yanka Kupala State University of GrodnoGrodno230023Belarus

The utilization of vortex generators to increase heat transfer from cylinders installed inside a duct is *** particular,a channel containing eight cylinders with volumetric heat sources is considered for different values of the Reynolds *** effective possibility to use vortex generators with different sizes to increase heat transfer and,consequently,reduce the surface temperature of the cylinders is ***,the amount of pressure drop inside the channel due to the presence of vortex generators is considered and compared with the cases without vortex *** results show that although the addition of generators increases the pressure drop,it strongly contributes to increase the heat transfer coefficient inside the duct(up to 80–90%).

关键词： Vortex generators heat trapped temperature of hot surfaces heat transfer

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