检索结果-南通市图书馆

Course Evaluation Based on Deep Learning and SSA Hyperparameters Optimization

Computers, Materials & Continua 2022年第4期71卷 941-959页

作者： Alaa A.El-Demerdash Sherif E.Hussein john fw zaki Department of Computer and Systems Faculty of EngineeringMansoura UniversityMansoura35516Egypt

Sentiment analysis attracts the attention of Egyptian Decisionmakers in the education *** offers a viable method to assess education quality services based on the students’feedback as well as that provides an understanding of their *** machine learning techniques offer automated strategies to process big data derived from social media and other digital channels,this research uses a dataset for tweets’sentiments to assess a few machine learning *** dataset preprocessing to remove symbols,necessary stemming and lemmatization is performed for features *** is followed by several machine learning techniques and a proposed Long Short-Term Memory(LSTM)classifier optimized by the Salp Swarm Algorithm(SSA)and measured the corresponding ***,the validity and accuracy of commonly used classifiers,such as Support Vector Machine,Logistic Regression Classifier,and Naive Bayes classifier,were ***,LSTM based on the SSA classification model was compared with Support Vector Machine(SVM),Logistic Regression(LR),and Naive Bayes(NB).Finally,as LSTM based SSA achieved the highest accuracy,it was applied to predict the sentiments of students’feedback and evaluate their association with the course outcome evaluations for education quality purposes.

关键词： Sentiment analysis course evaluation deep learning Bi-LSTM opinion mining students feedback natural language processing machine learning tweets analysis SSA

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Medium chain length polyhydroxyalkanoates as potential matrix materials for peripheral nerve regeneration

引用

Regenerative Biomaterials 2023年第1期10卷 1248-1260页

作者： Rinat Nigmatullin Caroline STaylor Pooja Basnett Barbara Lukasiewicz Alexandra Paxinou Lorena RLizarraga-Valderrama john WHaycock Ipsita Roy Higher Steaks Ltd. 25 Cambridge Science Park RdMiltonCambridge CB40FWUK School of Life Sciences College of Liberal Arts and SciencesUniversity of WestminsterLondon W1B 2HWUK Department of Materials Science&and Engineering The University of SheffieldSheffield S37HQUK Foundation of Research and Technology Hellas Institute of Chemical Engineering and High Temperature Chemical Processes(FORTH/ICE-HT)P.O.Box 1414GR 26504RionPatrasGreece School of Life Sciences Queen’s Medical CentreUniversity of NottinghamNottingham NG72UHUK

Polyhydroxyalkanoates are natural,biodegradable,thermoplastic and sustainable polymers with a huge potential in fabrication of bioresorbable implantable devices for tissue *** describe a comparative evaluation of three medium chain length polyhydroxyalkanoates(mcl-PHAs),namely poly(3-hydroxyoctanoate),poly(3-hydroxyoctanoate-co-3-hydoxydecanoate)and poly(3-hydroxyoctanoate-co-3-hydroxydecanoate-co-3-hydroxydodecanoate),one short chain length polyhydroxyalkanoate,poly(3-hydroxybutyrate),P(3HB)and synthetic aliphatic polyesters(polycaprolactone and polylactide)with a specific focus on nerve regeneration,due to mechanical properties of mcl-PHAs closely matching nerve *** vitro biological studies with NG108-15 neuronal cell and primary Schwann cells did not show a cytotoxic effect of the materials on both cell *** mcl-PHAs supported cell adhesion and *** the three mcl-PHAs,P(3HO-co-3HD)exhibited superior properties with regards to numbers of cells adhered and viable cells for both cell types,number of neurite extensions from NG108-15 cells,average length of neurite extensions and Schwann ***,similar characteristics were observed for flat P(3HB)surfaces,high rigidity of this biomaterial,and FDA-approved polymers such as PLLA,limits their applications in peripheral nerve ***,we have designed,synthesized and evaluated these materials for nerve tissue engineering and regenerative medicine,the interaction of mcl-PHAs with neuronal and Schwann cells,identifying mcl-PHAs as excellent materials to enhance nerve regeneration and potentially their clinical application in peripheral nerve repair.

关键词： peripheral nerve injury nerve regeneration biomaterials mcl-polyhydroxyalkanoates Schwann cells NG108-15

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

喜马拉雅造山带的地壳上地幔结构--近震反射观测结果

引用

岩石学报 2008年第7期24卷 1509-1516页

作者：姜枚王有学 NABELEK john 钱辉王亚军刘因张立树赵磊中国地质科学院地质研究所北京100037 桂林工学院桂林541004 美国俄勒冈州立大学康瓦利斯OR 97331-4501 合肥工业大学合肥230005

2002—2005年完成了穿越喜马拉雅山的宽频地震探测,采用了沿剖面紧密排列的台站布置并获得了近震中的反射波资料,这对地壳和岩石圈内部速度界面的研究有重要意义。地震数据及研究结果表明,青藏高原的地震主要发生于上地壳范围内,高原莫... 详细信息

2002—2005年完成了穿越喜马拉雅山的宽频地震探测,采用了沿剖面紧密排列的台站布置并获得了近震中的反射波资料,这对地壳和岩石圈内部速度界面的研究有重要意义。地震数据及研究结果表明,青藏高原的地震主要发生于上地壳范围内,高原莫霍面反射波的纵波 PmP 与横波 SmS 波至清晰可辨且有很强的能量,在跨越雅鲁藏布江时 PmP 和 SmS 均发生了错动,表现为北深南浅。在改则至鲁谷沿线所记录到的发生在拉萨地块的 fw21事件的地震数据中,拉萨地块内部的莫霍面反射波,尤其是 SmS 波至非常清晰连续,地壳纵波平均速度为 V_p=6.3km/s,表明拉萨地块内部 Moho 面平坦、连续,不存在突起与错位。在此 Moho 面之前出现壳内较强反射界面,埋深45km 可能正是下地壳的顶界面。P208事件中 PmP 和 SmS 均清晰可见,然而在距震中450km 及其以远地段存在两个清晰的震相 P_(LT)及 S_(LT),并且其能量很强,可能是位于160km 深处的岩石圈底界面的反映。根据对近震资料的分析研究,本文建立了该地区的地壳上地幔的结构模型。

关键词：喜马拉雅宽频地震近震反射地壳上地幔结构

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：