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Crack Detection and Localization on Wind Turbine Blade Using Machine Learning Algorithms: A Data Mining Approach 预览
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作者 A.Joshuva V.Sugumaran 《结构耐久性与健康监测(英文)》 2019年第2期181-203,共23页
Wind turbine blades are generally manufactured using fiber type material because of their cost effectiveness and light weight property however,blade get damaged due to wind gusts,bad weather conditions,unpredictable a... Wind turbine blades are generally manufactured using fiber type material because of their cost effectiveness and light weight property however,blade get damaged due to wind gusts,bad weather conditions,unpredictable aerodynamic forces,lightning strikes and gravitational loads which causes crack on the surface of wind turbine blade.It is very much essential to identify the damage on blade before it crashes catastrophically which might possibly destroy the complete wind turbine.In this paper,a fifteen tree classification based machine learning algorithms were modelled for identifying and detecting the crack on wind turbine blades.The models are built based on computing the vibration response of the blade when it is excited using piezoelectric accelerometer.The statistical,histogram and ARMA methods for each algorithm were compared essentially to suggest a better model for the identification and localization of crack on wind turbine blade. 展开更多
关键词 Structural health monitoring fault diagnosis BLADE CRACK STATISTICAL FEATURES HISTOGRAM FEATURES ARMA FEATURES tree algorithms vibration signals
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Flame Recognition in Video Images with Color and Dynamic Features of Flames 预览
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作者 Jiaqing Chen Xiaohui Mu +2 位作者 Yinglei Song Menghong Yu Bing Zhang 《自主智能(英文)》 2019年第1期30-45,共16页
Recently,video based flame detection has become an important approach for early detection of fire under complex circumstances.However,the detection accuracy of most existing methods remains unsatisfactory.In this pape... Recently,video based flame detection has become an important approach for early detection of fire under complex circumstances.However,the detection accuracy of most existing methods remains unsatisfactory.In this paper,we develop a new algorithm that can significantly improve the accuracy of flame detection in video images.The algorithm segments a video image and obtains areas that may contain flames by combining a two-step clustering based approach with the RGB color model.A few new dynamic and hierarchical features associated with the suspected regions,including the flicker frequency of flames,are then extracted and analyzed.The algorithm determines whether a suspected region contains flames or not by processing the color and dynamic features of the area altogether with a classifier,which can be a BP neural network,a k nearest neighbor classifier or a support vector machine.Testing results show that this algorithm is robust and efficient,and is able to significantly reduce the probability of false alarms. 展开更多
关键词 Fire Detection RGB COLOR Model Dynamic FEATURES HIERARCHICAL FEATURES FEATURE Fusion
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An Analysis of the Tough Guy Image of the Father in The Road 预览
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作者 杜昭雪 刘颖 《海外英语》 2019年第4期188-189,197共3页
The intrinsic and extrinsic features of the father in The Road as a“Tough Guy”are to be analyzed.For the inner world,he is calm towards the living environments,decisive when faced the emergency and persistent in dig... The intrinsic and extrinsic features of the father in The Road as a“Tough Guy”are to be analyzed.For the inner world,he is calm towards the living environments,decisive when faced the emergency and persistent in dignity and morality.For the actions,he is active in seeking foods,brave in fighting with the enemies and gentle with his son.Finally,the conclusion is drawn that the father is a“Tough Guy”. 展开更多
关键词 TOUGH Guy” The ROAD INTRINSIC FEATURES EXTRINSIC FEATURES
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Analysis of OSA Syndrome from PPG Signal Using CART-PSO Classifier with Time Domain and Frequency Domain Features 预览
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作者 N.Kins Burk Sunil R.Ganesan B.Sankaragomathi 《工程与科学中的计算机建模(英文)》 2019年第2期351-375,共25页
Obstructive Sleep Apnea(OSA)is a respiratory syndrome that occurs due to insufficient airflow through the respiratory or respiratory arrest while sleeping and sometimes due to the reduced oxygen saturation.The aim of ... Obstructive Sleep Apnea(OSA)is a respiratory syndrome that occurs due to insufficient airflow through the respiratory or respiratory arrest while sleeping and sometimes due to the reduced oxygen saturation.The aim of this paper is to analyze the respiratory signal of a person to detect the Normal Breathing Activity and the Sleep Apnea(SA)activity.In the proposed method,the time domain and frequency domain features of respiration signal obtained from the PPG device are extracted.These features are applied to the Classification and Regression Tree(CART)-Particle Swarm Optimization(PSO)classifier which classifies the signal into normal breathing signal and sleep apnea signal.The proposed method is validated to measure the performance metrics like sensitivity,specificity,accuracy and F1 score by applying time domain and frequency domain features separately.Additionally,the performance of the CART-PSO(CPSO)classification algorithm is evaluated through comparing its measures with existing classification algorithms.Concurrently,the effect of the PSO algorithm in the classifier is validated by varying the parameters of PSO. 展开更多
关键词 Obstructive sleep apnea photoplethysmogram signal time domain features frequency domain features classification and regression tree classifier particle swarm optimization algorithm.
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Drug resistance and pathogenic spectrum of patients coinfected with nontuberculous mycobacteria and human-immunodeficiency virus in Chengdu, China
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作者 Dong-Mei Wang Yi Liao +6 位作者 Qing-Feng Li Ma Zhu Gui-Hui Wu Yuan-Hong Xu Jing Zhong Jia Luo Ying-Jie Li 《中华医学杂志:英文版》 SCIE CAS CSCD 2019年第11期1293-1297,共5页
Background:Human-immunodeficiency virus (HIV) infection is increasing worldwide and nontuberculous mycobacteria (NTM) is an established microbiologic cause of pulmonary disease,lymphadenitis,and disseminated disease i... Background:Human-immunodeficiency virus (HIV) infection is increasing worldwide and nontuberculous mycobacteria (NTM) is an established microbiologic cause of pulmonary disease,lymphadenitis,and disseminated disease in cases of advanced immune suppression.Data on patients coinfected with HIV and NTM are limited.Thus,this study aimed to analyze the clinical characteristics,drug resistance,and pathogen spectrum of patients coinfected with both HIV and NTM in the Chengdu area of China.Methods:Data of 59 patients coinfected with both HIV and NTM collected from the Public Health Clinical Center of Chengdu,between January 2014 and December 2018,were analyzed.NTM drug sensitivity testing was performed using the microporous plate ratio method.Data were analyzed using SPSS 19.0,and the change in drug resistance rate was analyzed using the chi-square (x2) test.Results:Seven species/complex of NTM were identified from patients coinfected with HIV and NTM in this study,with Mycobacterium avium-intracellulare complex (52.5%) and M.kansasii (27.1%) as the predominant species.Male patients were more affected 50/59 (84.7%);the mean age of the 59 cases was 45 years.The clinical characteristics mainly included anemia (86.4%),cough and expectoration (79.7%).The baseline CD4 count was <50 cells/μL (84.7%).Patients were mainly in advanced acquired immunodeficiency syndrome (AIDS) stage.Chest imaging mainly showed patchy shadows (42.4%) and nodules (32.2%),with various degrees of AIDS-defining diseases.The drug resistance of NTM was severe,and the rate of isoniazid resistance (100.0%) was the highest,followed by rifampicin (94.9%),streptomycin (94.9%),ofloxacin (93.2%),and others.Ethambutol (52.5%) and clarithromycin (33.9%) were relatively low.No significant difference was found in the drug resistance rate of NTM strain against nine antituberculosis drugs in 5 years (P > 0.05).Condusions:The immune level of patients coinfected with HIV and NTM is low in advanced AIDS stage;more male are affected in patients who are mainly infected w 展开更多
关键词 Clinical features Drug resistance HIV MYCOBACTERIUM avium-intracellulare infection MYCOBACTERIUM kansasii Nontuberculous MYCOBACTERIA
传承与现代--甘南藏区传统聚落建设 预览
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作者 尚大悦 柴宗刚 《智能建筑与智慧城市》 2019年第5期141-143,146共4页
现代建设材料的使用与本土传统建筑风格和材质形成冲突,破坏了传统聚落的整体风貌和地方特色。论文通过实地调查研究和资料分析研究,总结了甘南藏族聚落传统建造的特征。以卓尼县尼巴村为例,按照本土传统建造与现代技术相结合的思路,通... 现代建设材料的使用与本土传统建筑风格和材质形成冲突,破坏了传统聚落的整体风貌和地方特色。论文通过实地调查研究和资料分析研究,总结了甘南藏族聚落传统建造的特征。以卓尼县尼巴村为例,按照本土传统建造与现代技术相结合的思路,通过本土文化、乡土材料、风貌特色等三方面的重塑,探讨甘南藏族传统聚落建设的方法,并提出优化策略。以期在保护文化传承的同时,实现乡村人居环境提升,激发传统聚落的生机与活力。 展开更多
关键词 传统聚落 本土文化 乡土材料 风貌特色 现代技术
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论李清照词时空艺术结构 预览
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作者 雷晶晶 《喀什大学学报》 2019年第4期80-85,共6页
李清照词中的时空结构外化成为作品的生命结构,内化成为词人的艺术人格结构。运用时空分析法观照李清照词,发现其词呈现出“横向铺叙”“纵向铺叙”和“交叉铺叙”三种时空结构类型;三种时空结构类型共同体现着“远”的美学精神,即“目... 李清照词中的时空结构外化成为作品的生命结构,内化成为词人的艺术人格结构。运用时空分析法观照李清照词,发现其词呈现出“横向铺叙”“纵向铺叙”和“交叉铺叙”三种时空结构类型;三种时空结构类型共同体现着“远”的美学精神,即“目远”“心远”“人远”及“味远”;因之见出李清照词持真任性、细腻芳馨、神骏味永、超越时空的艺术魅力。 展开更多
关键词 李清照词 时空结构 类型 特征 艺术魅力
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伴精神病性症状抑郁症患者人口学及临床特征 预览
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作者 辛立敏 陈林 +13 位作者 杨甫德 颜峰 王刚 方贻儒 陆铮 杨海晨 胡建 陈致宇 黄颐 孙静 王小平 李惠春 张晋碚 司天梅 《中国神经精神疾病杂志》 CAS CSCD 北大核心 2019年第8期466-470,共5页
目的比较伴与不伴精神病性症状抑郁症患者的人口学及临床特点。方法数据来源于“中国双相障碍患者诊断评估服务研究”项目,将来自全国13个研究中心的1172例抑郁症患者,根据有无精神病性症状,分为伴精神病性症状组和不伴精神病性症状组,... 目的比较伴与不伴精神病性症状抑郁症患者的人口学及临床特点。方法数据来源于“中国双相障碍患者诊断评估服务研究”项目,将来自全国13个研究中心的1172例抑郁症患者,根据有无精神病性症状,分为伴精神病性症状组和不伴精神病性症状组,采用自制调查问卷收集患者社会人口学及临床特征方面的资料,比较两组差异,并分析抑郁症患者伴精神病性症状的影响因素。结果13.3%(156/1172)的抑郁症患者伴有精神病性症状。与不伴精神病性症状组相比,伴精神病性症状的抑郁症患者起病早,年龄小,更多已婚,既往抑郁发作次数多,因精神疾病住院次数多,抑郁发作频繁,更多患者伴非典型特征、有周期性或季节性特点、伴自杀观念及精神障碍家族史(均P<0.05)。多因素logistic回归分析显示,起病年龄(OR=0.972,95%CI:0.957~0.987)、抑郁发作频繁(OR=2.099,95%CI:1.233~3.573)、伴非典型特征(OR=1.937,95%CI:1.277~2.939)、伴自杀观念(OR=1.654,95%CI:1.147~2.385)与抑郁症患者伴精神病性症状相关(均P<0.05)。结论伴精神病性症状的抑郁症患者具有起病年龄早、抑郁发作频繁、更常伴非典型特征、伴自杀观念的特点。 展开更多
关键词 抑郁症 精神病性症状 特征
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新时代国家职业教育改革试验区何去何从——基于12个已建试验区的反思与展望 预览
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作者 平和光 《河北师范大学学报:教育科学版》 北大核心 2019年第5期57-66,共10页
从2005年起,教育部先后与天津、河南、四川、三峡库区、广西、辽宁、山东潍坊、安徽皖江、黑龙江、浙江宁波、重庆、甘肃共建了12个国家职业教育改革试验区。各试验区聚焦自身改革发展存在的重点和难点问题,在力量上坚持了政府主导、目... 从2005年起,教育部先后与天津、河南、四川、三峡库区、广西、辽宁、山东潍坊、安徽皖江、黑龙江、浙江宁波、重庆、甘肃共建了12个国家职业教育改革试验区。各试验区聚焦自身改革发展存在的重点和难点问题,在力量上坚持了政府主导、目标上坚持了清晰可行、任务上坚持了具体明确、动力上坚持了制度突破、在落实上坚持了政策推进,从而促进了职业教育较大发展,主要表现为法规政策体系不断完善、经费投入力度不断加大、职业教育发展规模不断扩大、师资队伍水平不断提升、体制机制改革有所突破。但是,职业教育发展改革试验仍然存在一些问题,如观念有待进一步转变、站位有待进一步高远、特色有待进一步凸显、协同有待进一步加强、力度有待进一步推进。进入新时代,面对新矛盾、新问题、新目标,国家职业教育改革试验区建设应当更加突出改革试验的规律性、人本性、问题性、协调性、创新性。 展开更多
关键词 新时代 国家职业教育改革试验区 特点 经验 问题 趋势
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再论新时代高校学生规范要义——以《普通高等学校学生管理规定》为视角 预览
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作者 张进军 张兴堂 《西藏大学学报》 CSSCI 2019年第2期214-222,共9页
2017年出台的《普通高等学校学生管理规定》,是以习近平同志为核心的党中央关于高等教育新思想、新理念、新战略的体现,是我国高等学校内涵式发展,尤其是“怎样培养人,培养什么样的人”,即落实“立德树人”具体任务的体现,为新时代高校... 2017年出台的《普通高等学校学生管理规定》,是以习近平同志为核心的党中央关于高等教育新思想、新理念、新战略的体现,是我国高等学校内涵式发展,尤其是“怎样培养人,培养什么样的人”,即落实“立德树人”具体任务的体现,为新时代高校建设和发展提供了基本的法治依据。文章认为对管理规范的理解和运用,在形式层面应做到规范与规范之间、规范各部分之间、规范效果与社会效果之间的统一;在实质层面应深刻领会育人为本、学校自治、学生自由、社会责任的内在一致性,从而全面体现秩序的公平正义价值,引领学生树立遵纪守法意识,为培养合格人才提供规范保障。 展开更多
关键词 学生规范 特色要义 形式要义 实质要义
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基于深度学习的卷积神经网络在图像风格化处理中的应用研究 预览
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作者 谭永前 曾凡菊 《信息与电脑》 2019年第19期65-66,共2页
图像的风格化处理已广泛应用在各个领域,近年来引起了众多学者的研究兴趣。笔者通过对传统风格化处理的相关算法进行分析,发现传统风格化算法在提取图像重要特征、定义图像的重要特征等方面存在一些不足,并指出了图像风格化处理的新方向... 图像的风格化处理已广泛应用在各个领域,近年来引起了众多学者的研究兴趣。笔者通过对传统风格化处理的相关算法进行分析,发现传统风格化算法在提取图像重要特征、定义图像的重要特征等方面存在一些不足,并指出了图像风格化处理的新方向,为今后图像的风格化处理提供了一个重要参考。 展开更多
关键词 卷积神经网络 图像处理 风格化处理 特征
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On the Lexical Features of New Zealand English 预览
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作者 YAN Hong-cai SONG Yin-qiu 《文学与艺术研究:英文版》 2019年第4期392-397,共6页
New Zealand English has a history of more than 200 years. Compared with other English variants, New Zealand English vocabulary has formed its own unique linguistic characteristics in terms of Maori vocabulary, compoun... New Zealand English has a history of more than 200 years. Compared with other English variants, New Zealand English vocabulary has formed its own unique linguistic characteristics in terms of Maori vocabulary, compound words, changes in lexical meaning, acronyms, slang, and idioms, etc. A study of the lexical features of New Zealand English is helpful to our comprehensive understanding of English as a universal language. With the development of economic and cultural exchanges between China and New Zealand, it is of great practical significance to the study of New Zealand English. 展开更多
关键词 NEW Zealand ENGLISH Maori VOCABULARY FEATURES
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浅谈粤东闽语声母的特点
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作者 林春雨 《民族语文》 CSSCI 北大核心 2019年第4期53-63,共11页
本文通过对粤东五市73个调查点声母的比较,从双唇清擦音?和齿唇音声母pf、pfh、bv、ig、f、v,舌叶音t∫、t∫h,∫、3,疑母字的今读差异,明、微母字的今读差异以及浊音清化的情况五个方面,总结粤东闽语声母的特点。
关键词 粤东闽语 声母 特点
Stylistic Analysis of Internet News—Taking Internet Video Newsand In? ternet Audio News as Examples 预览
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作者 周逸轩 《海外英语》 2019年第9期212-213,共2页
With the rapid development of Internet around the world, network is transmitting all kinds of information to human beings nowadays. Net news, also called cyber news is affecting people’s expression of daily English. ... With the rapid development of Internet around the world, network is transmitting all kinds of information to human beings nowadays. Net news, also called cyber news is affecting people’s expression of daily English. A large number of cyber words, phrases even sentences, which are different from conventional English, are formed and become popular in the cyber world. This paper discusses different markers of net news by taking Internet video news and Internet audio news as examples so that the readers can fully understand the properties of net news. 展开更多
关键词 INTERNET NEWS INTERNET video NEWS INTERNET AUDIO NEWS STYLISTICS features of INTERNET NEWS
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马克思主义的国际主义特性与内涵新考--基于“阶级联合”与“自由人的联合”双重视阈 预览
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作者 李爱敏 《湖州师范学院学报》 2019年第1期53-60,共8页
虽然马克思恩格斯不是现代意义上的"国际主义"概念的最早提出者,但马克思主义的国际主义却是迄今为止人类社会影响最大、最广、最深远的国际主义思想。马克思恩格斯着眼于资本主义时代无产阶级受压迫的现状和人类对自身整体... 虽然马克思恩格斯不是现代意义上的"国际主义"概念的最早提出者,但马克思主义的国际主义却是迄今为止人类社会影响最大、最广、最深远的国际主义思想。马克思恩格斯着眼于资本主义时代无产阶级受压迫的现状和人类对自身整体解放的追求,在他们共同创立的历史唯物主义基础上,提出了"阶级联合"和"自由人的联合"的号召与设想,赋予了"国际主义"以特定的性质和内涵。从"两个联合"的视阈出发,马克思主义的国际主义具有阶级特性、革命特性、实践特性、世界历史特性和共产主义特性,这些特性随着时代变迁和世界历史的发展,反映为无产阶级国际主义和人类共同体意识两个维度的内容,共同构成马克思主义国际主义的总体内涵。 展开更多
关键词 马克思主义 国际主义 特性 内涵
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A Study on the Features of Thematic Progression in Chinese English Majors’Argumentative Writing 预览
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作者 王佩佩 《海外英语》 2019年第7期256-258,共3页
Based on the six Thematic Progression patterns proposed by Huang Guowen, a comparative study of argumentative writing by Chinese English majors is carried out, aiming at finding out the features of thematic progressio... Based on the six Thematic Progression patterns proposed by Huang Guowen, a comparative study of argumentative writing by Chinese English majors is carried out, aiming at finding out the features of thematic progression in college writing from a developmental perspective. The research results show that the parallel progression, the continuous progression and the concentrated progression are the tendency TP patterns by Chinese English Majors in the argumentative writing. In addition, Grade two is a key stage where the ability has a substantial change. Therefore, teachers and students should take full advantage of the best learning opportunity. 展开更多
关键词 FEATURES THEMATIC PROGRESSION ARGUMENTATIVE WRITING
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A Sociolinguistic Interpretation on Internet Catchwords 预览
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作者 谢梦雨 《海外英语》 2019年第11期264-265,共2页
Nowadays,influenced by the spreading Internet wave,a mass of Internet catchwords are emerging and coming into fashion.This paper,in the perspective of sociolinguistics,describes the formation features of Internet catc... Nowadays,influenced by the spreading Internet wave,a mass of Internet catchwords are emerging and coming into fashion.This paper,in the perspective of sociolinguistics,describes the formation features of Internet catchwords with exemplars of沙雕(傻屌),表脸,尬聊,厉害了Word哥,盘他…and analyzes the generation causes of them to help readers have a better understand of Internet catchwords.Through analyzing these words,we can conclude that there are more and more Internet catchwords emerging with netizens'increasing language demands. 展开更多
关键词 Internet CATCHWORDS features generation CAUSES SOCIOLINGUISTICS
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《花间集》所载顾夐词研究 预览
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作者 赵慧 《伊犁师范学院学报:社会科学版》 2019年第2期19-23,共5页
《花间集》作为我国第一部文人词选集,收录了温庭筠、韦庄、顾夐等18位晚唐五代文人共500首词,为之后名家林立的宋词开创了词的创作先河。顾夐词总体上极近温庭筠词风格,以艳著称。在意象的选取方面,顾夐词的女性化特征显著,多描绘女子... 《花间集》作为我国第一部文人词选集,收录了温庭筠、韦庄、顾夐等18位晚唐五代文人共500首词,为之后名家林立的宋词开创了词的创作先河。顾夐词总体上极近温庭筠词风格,以艳著称。在意象的选取方面,顾夐词的女性化特征显著,多描绘女子的装饰、闺阁的器物等;写作手法上多含蓄的渲染和烘托,亦不乏白描手法的运用。这种典型的“男子而作闺音”的特殊现象,源自作者所处的特殊的时代背景、地域背景以及作者的个人性格等,这也为我们提供了多元的艺术审美价值和文学研究价值。 展开更多
关键词 顾夐 特征 意义
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发展性社会工作的脉络、特点及其在反贫困中的运用 被引量:1
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作者 向德平 程玲 《西北师大学报:社会科学版》 CSSCI 北大核心 2019年第2期47-52,共6页
发展性社会工作以行动与变迁为取向,以生产性活动和社会投资策略为核心,通过有利于经济社会发展的社会工作实践,提升整体性社会福利。发展性社会工作对反贫困工作具有重要意义,在发展性社会工作指导下,我国反贫困领域的社会工作应以整... 发展性社会工作以行动与变迁为取向,以生产性活动和社会投资策略为核心,通过有利于经济社会发展的社会工作实践,提升整体性社会福利。发展性社会工作对反贫困工作具有重要意义,在发展性社会工作指导下,我国反贫困领域的社会工作应以整合社会发展与经济发展为目标;以社区为基本介入单元;以多重社会工作干预联动为方法;以能力提升和可持续生计为策略。 展开更多
关键词 发展性社会工作 反贫困 脉络 特点 运用
Monitoring and Evaluation of Environmental Quality of the Waters near the Feiyun River Estuary in Wenzou in Recent Years 预览
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作者 Yao Dongping Lin Bo +2 位作者 Zhang Haifeng Zheng Fangqin Ye Xinrong 《气象与环境研究:英文版》 CAS 2019年第4期100-105,109共7页
Based on the monitoring results of environmental quality of the waters near the Feiyun River estuary during 2011-2016, the current situation of environmental quality of the waters was analyzed and evaluated. The resul... Based on the monitoring results of environmental quality of the waters near the Feiyun River estuary during 2011-2016, the current situation of environmental quality of the waters was analyzed and evaluated. The results showed that pH, DO, COD Mn , petroleum, and heavy metals (Cu, Pb, Zn, Cd, Hg, As and Cr) in the waters near the Feiyun River estuary did not exceed the second-class standard of Seawater Quality Standard (GB 3097-1997), while both inorganic nitrogen and reactive phosphate in the waters exceeded the second-class standard obviously. The water quality of the waters near the Feiyun River estuary was in an eutrophic state. In terms of sediment quality, the standard index of most evaluation factors except for Cu was smaller than 1, meeting the demands of sediment quality for environmental protection. 展开更多
关键词 WATERS NEAR the Feiyun River ESTUARY Current situation of environmental QUALITY Evaluation Features of water QUALITY EUTROPHICATION
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