Article(id=1241416385037922648, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241416382559081210, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2025.03.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1734883200000, receivedDateStr=2024-12-23, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773906330594, onlineDateStr=2026-03-19, pubDate=1748707200000, pubDateStr=2025-06-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773906330594, onlineIssueDateStr=2026-03-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773906330594, creator=13701087609, updateTime=1773906330594, updator=13701087609, issue=Issue{id=1241416382559081210, tenantId=1146029695717560320, journalId=1235980550691926019, year='2025', volume='45', issue='3', pageStart='1', pageEnd='223', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773906330003, creator=13701087609, updateTime=1773908015401, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241423451685179940, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241416382559081210, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241423451685179941, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1241416382559081210, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=35, endPage=43, ext={EN=ArticleExt(id=1241416386279436651, articleId=1241416385037922648, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Feature Extraction and Flow Pattern Recognition of Gas-Liquid Two-Phase Flow Based on Improved Wavelet Thresholding, columnId=1236276106018484431, journalTitle=Mining and Metallurgical Engineering, columnName=MINING, runingTitle=null, highlight=null, articleAbstract=
Wavelet analysis was performed for the collected pressure signals of gas-liquid two-phase flow in a vertical pipe in an air lift test. The optimal wavelet basis functions were determined by improving the signal-to-noise ratio (SNR). The range of decomposition levels was determined based on changes in energy of detail coefficients, and optimal decomposition levels were determined by the entropy weight method together with SNR, root mean square error and smoothness. After denoise with wavelet thresholding, three-level decomposition of signal was performed with the wavelet packet method, and then flow patterns were identified for gas-liquid two-phase flow with the energy ratio in the 1st and 2nd frequency bands and entropy values as feature vectors. The flow pattern recognition based on 389 sets of pressure signals shows that the extraction feature vector combined with random subspace decision tree can efficiently identify and classify gas-liquid two-phase flow patterns, and the overall mean recognition rate is up to 98.08% by adopting the improved wavelet thresholding.
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对垂直管道气力提升实验中采集的气液两相流的压力信号进行小波分析,通过改善信噪比确定最佳小波基函数。根据小波细节系数能量变化确定分解层数范围,采用熵权法结合信噪比、均方根误差以及平滑度确定最佳分解层数。对小波阈值去噪后的信号进行小波包分解,以分解后的第1、2频带能量占比以及熵值作为特征向量对气液两相流进行流型识别。389组压力信号的流型识别结果表明,提取特征向量结合随机子空间决策树模型可以对气液两相流流型进行高效识别分类,采用改进小波阈值法处理后的流型整体平均识别率达98.08%。
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, authorsList=陈立, 杜燕连, 彭甫森, 韩振华, 阮荣倩, 沈义俊)}, authors=[Author(id=1241422260603515262, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=lichen01172001@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1241422260729344395, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, authorId=1241422260603515262, language=EN, stringName=Li CHEN, firstName=Li, middleName=null, lastName=CHEN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.School of Information and Communication Engineering, Hainan University, Haikou 570100, Hainan, China
2.State Key Laboratory of South China Sea Marine Resources Utilization, Hainan University, Haikou 570100, Hainan, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241422260892922268, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, authorId=1241422260603515262, language=CN, stringName=陈立, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.海南大学 信息与通信工程学院,海南 海口 570100
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陈立(2000—),男,江西九江人,硕士研究生,主要从事海洋信息感知与处理、算法设计及开发。E-mail:lichen01172001@163.com
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陈立(2000—),男,江西九江人,硕士研究生,主要从事海洋信息感知与处理、算法设计及开发。E-mail:lichen01172001@163.com
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1.School of Information and Communication Engineering, Hainan University, Haikou 570100, Hainan, China
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1.海南大学 信息与通信工程学院,海南 海口 570100
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1.School of Information and Communication Engineering, Hainan University, Haikou 570100, Hainan, China
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1.海南大学 信息与通信工程学院,海南 海口 570100
2.海南大学 南海海洋资源利用国家重点实验室,海南 海口 570100, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241422258544111964, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, xref=1., ext=[AuthorCompanyExt(id=1241422258548306269, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, companyId=1241422258544111964, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1.School of Information and Communication Engineering, Hainan University, Haikou 570100, Hainan, China), AuthorCompanyExt(id=1241422258556694878, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, companyId=1241422258544111964, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1, 2, address=
1.School of Information and Communication Engineering, Hainan University, Haikou 570100, Hainan, China
2.State Key Laboratory of South China Sea Marine Resources Utilization, Hainan University, Haikou 570100, Hainan, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241422262650335739, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, authorId=1241422262306402789, language=CN, stringName=韩振华, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.海南大学 信息与通信工程学院,海南 海口 570100
2.海南大学 南海海洋资源利用国家重点实验室,海南 海口 570100, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241422258544111964, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, xref=1., ext=[AuthorCompanyExt(id=1241422258548306269, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, companyId=1241422258544111964, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2, 3, address=
2.State Key Laboratory of South China Sea Marine Resources Utilization, Hainan University, Haikou 570100, Hainan, China
3.School of Marine Science and Engineering, Hainan University, Haikou 570100, Hainan, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241422264592298521, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, authorId=1241422262818107911, language=CN, stringName=阮荣倩, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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2.海南大学 南海海洋资源利用国家重点实验室,海南 海口 570100
3.海南大学 海洋科学与工程学院,海南 海口 570100, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241422260033089895, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, xref=2., ext=[AuthorCompanyExt(id=1241422260041478502, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, companyId=1241422260033089895, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Denoising process by wavelet thresholding, figureFileSmall=1SajcTGtrbh3GMv3PcTwGw==, figureFileBig=zOu5OefS1XovDzIDsJlurA==, tableContent=null), ArticleFig(id=1241422269289919150, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图1, caption=
小波阈值去噪流程, figureFileSmall=1SajcTGtrbh3GMv3PcTwGw==, figureFileBig=zOu5OefS1XovDzIDsJlurA==, tableContent=null), ArticleFig(id=1241422269415748276, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Fig.2, caption=
A lift device for gas-liquid two-phase flow, figureFileSmall=T1Ntsh2VnpS7Jkp8DDTH/Q==, figureFileBig=rGt+TI+4uO9OoMx9dQnxuw==, tableContent=null), ArticleFig(id=1241422269554160313, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图2, caption=
气液两相流液体提升装置1—空气压缩机;2—稳压阀;3—气体流量计;4—流量调节计;5—注气口;6—CCD摄像机;7—压力传感器;8—压力数据采集系统;9—图像采集系统;10—声波流量计;11—分离箱
, figureFileSmall=T1Ntsh2VnpS7Jkp8DDTH/Q==, figureFileBig=rGt+TI+4uO9OoMx9dQnxuw==, tableContent=null), ArticleFig(id=1241422269830984384, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Fig.3, caption=
Flow patterns of gas-liquid two-phase flow in a vertical pipe in test, figureFileSmall=9OwcVbrOsxhLhw5Yj5BmgQ==, figureFileBig=kylizOr+KZ6OWZSLZ86b4A==, tableContent=null), ArticleFig(id=1241422269986173639, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图3, caption=
垂直立管实验段气液两相流流型变化, figureFileSmall=9OwcVbrOsxhLhw5Yj5BmgQ==, figureFileBig=kylizOr+KZ6OWZSLZ86b4A==, tableContent=null), ArticleFig(id=1241422270162334413, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Fig.4, caption=
Improved SNR for different wavelet basis functions, figureFileSmall=3A2PvR/PKYSd/WKxQjlDdQ==, figureFileBig=HdDPSrRr12avVXqYdXTMgw==, tableContent=null), ArticleFig(id=1241422270304940752, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图4, caption=
不同小波基函数可改善信噪比(a)泡状流;(b)弹状流
, figureFileSmall=3A2PvR/PKYSd/WKxQjlDdQ==, figureFileBig=HdDPSrRr12avVXqYdXTMgw==, tableContent=null), ArticleFig(id=1241422270418186966, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Fig.5, caption=
Performance indicators of each flow pattern with different decomposition levels, figureFileSmall=7PP9ZtYYVwoBoaKmVkgH/Q==, figureFileBig=G2JRRyXrU7CtaqE70olh8Q==, tableContent=null), ArticleFig(id=1241422270523044571, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图5, caption=
不同分解层数下各流型性能指标(a)去噪后信噪比;(b)去噪后均方根误差;(c)去噪后平滑度
, figureFileSmall=7PP9ZtYYVwoBoaKmVkgH/Q==, figureFileBig=G2JRRyXrU7CtaqE70olh8Q==, tableContent=null), ArticleFig(id=1241422270615319261, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Fig.6, caption=
Denoising effects of different flow patterns, figureFileSmall=sNmCywCJ8+BMafcEu51/FQ==, figureFileBig=0yhdwW2wdyjX992ilzeqAQ==, tableContent=null), ArticleFig(id=1241422270724371169, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图6, caption=
不同流型去噪效果(a)泡状流;(b)弹状流;(c)搅浑流;(d)环状流
, figureFileSmall=sNmCywCJ8+BMafcEu51/FQ==, figureFileBig=0yhdwW2wdyjX992ilzeqAQ==, tableContent=null), ArticleFig(id=1241422270791480037, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Fig.7, caption=
Frequency spectra of different flow patterns, figureFileSmall=UI3UsaDkUOpKc7lFkDbqWg==, figureFileBig=vqVz22YREgyzzfzPilfjfA==, tableContent=null), ArticleFig(id=1241422270879560425, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图7, caption=
不同流型的频谱, figureFileSmall=UI3UsaDkUOpKc7lFkDbqWg==, figureFileBig=vqVz22YREgyzzfzPilfjfA==, tableContent=null), ArticleFig(id=1241422271064109804, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Fig.8, caption=
Changes in energy ratio and entropy values within the first and second frequency bands for different flow patterns, figureFileSmall=gfLENjmQbNPWzpZ682jyvA==, figureFileBig=pmMq1c8vJv+EYYNaJCI9LQ==, tableContent=null), ArticleFig(id=1241422271189938927, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=图8, caption=
不同流型第1、2频带内能量占比和熵值变化(a)第1频带能量占比;(b)第2频带能量占比;(c)小波包熵值
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Energy of details coefficients of wavelet transformation with different decomposition scales
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| 分解层数 | 小波细节系数能量 |
|---|
| 泡状流 | 弹状流 | 搅浑流 | 环状流 |
|---|
| 1 | 2.34 | 2.32 | 2.35 | 2.34 |
| 2 | 2.32 | 2.31 | 2.33 | 2.33 |
| 3 | 2.31 | 2.30 | 2.32 | 2.31 |
| 4 | 2.30 | 2.29 | 2.35 | 2.34 |
| 5 | 2.33 | 2.34 | 3.34 | 3.56 |
| 6 | 2.40 | 2.93 | 5.70 | 6.53 |
), ArticleFig(id=1241422271596786422, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=表1, caption=
不同分解尺度下小波细节系数能量
, figureFileSmall=null, figureFileBig=null, tableContent=
| 分解层数 | 小波细节系数能量 |
|---|
| 泡状流 | 弹状流 | 搅浑流 | 环状流 |
|---|
| 1 | 2.34 | 2.32 | 2.35 | 2.34 |
| 2 | 2.32 | 2.31 | 2.33 | 2.33 |
| 3 | 2.31 | 2.30 | 2.32 | 2.31 |
| 4 | 2.30 | 2.29 | 2.35 | 2.34 |
| 5 | 2.33 | 2.34 | 3.34 | 3.56 |
| 6 | 2.40 | 2.93 | 5.70 | 6.53 |
), ArticleFig(id=1241422271819084535, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Table 2, caption=
Composite indicators of different flow patterns
, figureFileSmall=null, figureFileBig=null, tableContent=
| 分解层数 | 复合指标 |
|---|
| 泡状流 | 弹状流 | 搅浑流 | 环状流 |
|---|
| 2 | 0.46 | 0.52 | 0.009 9 | 0.005 6 |
| 3 | 0.19 | 0.21 | 0.000 3 | 0.001 8 |
| 4 | 0.035 | 0.007 8 | 0.35 | 0.35 |
| 5 | 0.34 | 0.50 | 0.90 | 0.90 |
| 6 | 0.57 | 0.38 | 0.077 | 0.022 |
), ArticleFig(id=1241422271949107963, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=表2, caption=
不同流型的复合指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| 分解层数 | 复合指标 |
|---|
| 泡状流 | 弹状流 | 搅浑流 | 环状流 |
|---|
| 2 | 0.46 | 0.52 | 0.009 9 | 0.005 6 |
| 3 | 0.19 | 0.21 | 0.000 3 | 0.001 8 |
| 4 | 0.035 | 0.007 8 | 0.35 | 0.35 |
| 5 | 0.34 | 0.50 | 0.90 | 0.90 |
| 6 | 0.57 | 0.38 | 0.077 | 0.022 |
), ArticleFig(id=1241422272095908606, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Table 3, caption=
Recognition rates of five models
, figureFileSmall=null, figureFileBig=null, tableContent=
| 算法 | 识别率/% |
|---|
| NB | 93.97 |
| KNN | 94.82 |
| RF | 94.87 |
| AB-DT | 98.06 |
| RS-DT | 98.66 |
), ArticleFig(id=1241422273597469441, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=表3, caption=
5种模型的识别率
, figureFileSmall=null, figureFileBig=null, tableContent=
| 算法 | 识别率/% |
|---|
| NB | 93.97 |
| KNN | 94.82 |
| RF | 94.87 |
| AB-DT | 98.06 |
| RS-DT | 98.66 |
), ArticleFig(id=1241422273702327042, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=EN, label=Table 4, caption=
Flow pattern recognition results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 处理方法 | 流型类别 | 平均识别率/% | 整体平均识别率/% |
|---|
| 改进后小波阈值去噪 | 泡状流 | 100 | 98.08 |
| 弹状流 | 100 |
| 搅浑流 | 96.67 |
| 环状流 | 95.65 |
| 改进前小波阈值去噪 | 泡状流 | 92.50 | 90.92 |
| 弹状流 | 83.33 |
| 搅浑流 | 96.55 |
| 环状流 | 91.30 |
), ArticleFig(id=1241422273802990342, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1241416385037922648, language=CN, label=表4, caption=
流型识别结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 处理方法 | 流型类别 | 平均识别率/% | 整体平均识别率/% |
|---|
| 改进后小波阈值去噪 | 泡状流 | 100 | 98.08 |
| 弹状流 | 100 |
| 搅浑流 | 96.67 |
| 环状流 | 95.65 |
| 改进前小波阈值去噪 | 泡状流 | 92.50 | 90.92 |
| 弹状流 | 83.33 |
| 搅浑流 | 96.55 |
| 环状流 | 91.30 |
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