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Working condition recognition of sucker rod pumping system based on 4-segment time-frequency signature matrix and deep learning

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Petroleum Science 2024年第1期21卷 641-653页

作者： Yun-Peng He Hai-Bo Cheng Peng Zeng Chuan-Zhi Zang Qing-Wei Dong Guang-xi wan xiao-Ting Dong State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016LiaoningChina Key Laboratory of Networked Control Systems Chinese Academy of SciencesShenyang 110016LiaoningChina Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169LiaoningChina University of Chinese Academy of Sciences Beijing100049China School of Artifcial Intelligence Shenyang University of TechnologyShenyang 110870LiaoningChina

High-precision and real-time diagnosis of sucker rod pumping system(SRPS)is important for quickly mastering oil well operations.Deep learning-based method for classifying the dynamometer card(DC)of oil wells is an efficient diagnosis method.However,the input of the DC as a two-dimensional image into the deep learning framework suffers from low feature utilization and high computational effort.Additionally,different SRPSs in an oil field have various system parameters,and the same SRPS generates different DCs at different moments.Thus,there is heterogeneity in field data,which can dramatically impair the diagnostic accuracy.To solve the above problems,a working condition recognition method based on 4-segment time-frequency signature matrix(4S-TFSM)and deep learning is presented in this paper.First,the 4-segment time-frequency signature(4S-TFS)method that can reduce the computing power requirements is proposed for feature extraction of DC data.Subsequently,the 4S-TFSM is constructed by relative normalization and matrix calculation to synthesize the features of multiple data and solve the problem of data heterogeneity.Finally,a convolutional neural network(CNN),one of the deep learning frameworks,is used to determine the functioning conditions based on the 4S-TFSM.Experiments on field data verify that the proposed diagnostic method based on 4S-TFSM and CNN(4S-TFSM-CNN)can significantly improve the accuracy of working condition recognition with lower computational cost.To the best of our knowledge,this is the first work to discuss the effect of data heterogeneity on the working condition recognition performance of SRPS.

关键词： Sucker-rod pumping system Dynamometer card Working condition recognition Deep learning Time-frequency signature Time-frequency signature matrix

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Icariin ameliorates viral myocarditis by inhibiting TLR4-mediated ferroptosis

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Asian Pacific Journal of Tropical Biomedicine 2024年第3期14卷 106-114,I0002-I0005页

作者： Wei Luo Yi Lu Jun-Hua Deng Peng Liu Yan Huang wan-xi Liu Chun-Li Huang Laboratory of the Atherosclerosis and Ischemic Cardiovascular Diseases Department of CardiologyAffiliated Hospital of Youjiang Medical University for NationalitiesYoujiang Medical University for NationalitiesBaiseGuangxi 533000China Department of Critical Care Medicine Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxi 533000China Department of Respiratory and Critical Care Medicine Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxi 533000China Postgraduate School of Youjiang Medical University for Nationalities BaiseGuangxi 533000China Department of Neonatology Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxi 533000China Department of Nephrology People’s Hospital of PubeiQinzhouGuangxi 535300China Urban Community Health Service Center of Youjiang District BaiseGuangxi 533000China

Objective:To explore the mechanism by which icariin alleviates viral myocarditis.Methods:CVB3-induced cardiomyocytes were used as an in vitro model of viral myocarditis to assess the effects of icariin treatment on cell viability,inflammation,and apoptosis.Moreover,the effects of icariin on ferroptosis and TLR4 signaling were assessed.After AC16 cells were transfected with TLR4 overexpression plasmids,the role of TLR4 in mediating the regulatory effect of icariin in viral myocarditis was investigated.Results:Icariin significantly elevated cell viability and reduced inflammatory factors TNF-α,IL-1β,IL-6,and IL-18.Flow cytometry revealed that icariin decreased apoptosis rate,and the protein expression of Bax and cleaved caspase 3 and 9 in CVB3-induced cardiomyocytes.Additionally,it suppressed ferroptosis including lipid peroxidation and ferrous ion,as well as the TLR4 signaling.However,TLR4 overexpression abrogated the modulatory effects of icariin.Conclusions:Icariin mitigates CVB3-induced myocardial injury by inhibiting TLR4-mediated ferroptosis.Further animal study is needed to verify its efficacy.

关键词： Viral myocarditis CVB3 TLR4 Ferroptosis Icariin

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Towards Scalable Fabrications and Applications of 2D Layered Material-based Vertical and Lateral Heterostructures

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Chemical Research in Chinese Universities 2020年第4期36卷 525-550页

作者： wan xi LI Hao CHEN Kun XU Jianbin Engineering Research Center of IoT Technology Applications(Ministry of Education) Department of Electronic EngineeringJiangnan UniversityWuxi 214122P.R.China Department of Electronic Engineering and Materials Science and Technology Research Center The Chinese University of Hong KongShatinN.T.Hong Kong SAR 999077P.R.China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information Technology and Guangdong Province Key Laboratory of Display MaterialSun Yat-sen UniversityGuangzhou 510275P.R.China

Among 108423 unique,experimentally known 3D compounds,there exist 1825 ones that are either easily or potentially exfoliable.This increasingly broad library of 2D layered materials(2DLMs)with variable physical properties as well as the unique ability to vertical stacking or lateral stitching 2DLMs into complex heterostructures enables a new dimension for materials engineering and device design,offering novel functional electronics and optoelectronics for flexible industry.In this review,we present a comprehensive summary of the state-of-the-art scalable fabrication technologies,the unique properties as well as the potential device applications of the emerging 2D heterostructures.Firstly,we depict an overall picture of the 2D vertical van der Waals heterostructures.Secondly,we focus on the 2D lateral heterostructures by CVD technique.For a quick access and full coverage,both the vertical and lateral 2D heterostructures are classified into several types according to their chemical compounds with different dimensions.In the end,both the challenges and potential applications of these 2D heterostructures are discussed.

关键词： Two-dimensional(2D) Graphene Hexagonal boron nitride(hBN) Transition metal dichalcogenide Fabrication Vertical Lateral Heterostructure

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新疆干旱区砾类土路基水分迁移试验研究

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中国高新科技 2024年第6期 46-48页

作者：万曦新疆农业大学交通与物流工程学院新疆乌鲁木齐830052

为探究新疆干旱区砾类土路基水分迁移特性,文章对哈密地区原路基土进行取样,通过砾类土室内土柱试验,对温度和含水率进行实时监测,分析不同冷端温度对水分迁移的影响。结果表明,土样冻结阶段各测点温度随时间表现出先快速下降、后缓慢... 详细信息

为探究新疆干旱区砾类土路基水分迁移特性,文章对哈密地区原路基土进行取样,通过砾类土室内土柱试验,对温度和含水率进行实时监测,分析不同冷端温度对水分迁移的影响。结果表明,土样冻结阶段各测点温度随时间表现出先快速下降、后缓慢下降、最终保持稳定的变化特点。距离冷端温度越远的土样,受暖端温度影响更大。不同冷端温度土样含水率变化总体呈先增大后减小的规律,土样水分受到温度的影响,含水率发生重分布,在距土样底端不同位置出现含水率的峰值,冷端温度越低,冻结锋面位置下降,冻结锋面边缘的未冻水不断向冻结锋面聚集,含水率明显增大。

关键词：砾类土水分迁移模型试验

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陇东旱地冬小麦区域试验品系农艺性状及抗逆性分析

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西南农业学报 2024年第5期37卷 980-989页

作者：段珊付之乐王晶晶孟海涛施万喜陇东学院农林科技学院甘肃庆阳745000 甘肃省旱地冬小麦种质创新与应用工程研究中心甘肃庆阳745000 甘肃省黄土高原旱作农业院士专家协同创新基地甘肃庆阳745000 陇东旱地作物种质改良及产业化协同创新中心甘肃庆阳745000

【目的】分析陇东片区区域试验小麦品系的农艺性状变异规律和抗逆性综合表现,为陇东旱地小麦品种改良提供依据。【方法】以2005—2022年陇东旱地区域试验共192份冬小麦品系(不含对照)为试验材料,通过相关性分析、多元回归分析、通径分... 详细信息

【目的】分析陇东片区区域试验小麦品系的农艺性状变异规律和抗逆性综合表现,为陇东旱地小麦品种改良提供依据。【方法】以2005—2022年陇东旱地区域试验共192份冬小麦品系(不含对照)为试验材料,通过相关性分析、多元回归分析、通径分析和聚类分析对参试品系的产量、生育期、基本苗、总茎数、有效穗数、株高、穗长、穗粒数和千粒重等主要农艺性状进行综合分析,同时,对参试品系的抗逆性(抗寒性、耐旱性、抗倒伏、条锈病、叶锈病、白粉病)进行评价。【结果】参试品系产量为2791.65~5979.29 kg/hm^(2),均产4635.75 kg/hm^(2)。农艺性状的变异系数排序为:产量(17.16%)>有效穗数(14.40%)>株高(11.37%)>穗粒数(9.65%)>千粒重(9.54%)>穗长(9.47%)>总茎数(8.55%)>基本苗(8.08%)>生育期(1.21%),产量、有效穗数、穗粒数、千粒重和株高均随参试年份的推进而缓慢提高,生育期则缓慢降低。相关分析结果表明,产量与穗粒数(r=0.645)、千粒重(r=0.594)和株高(r=0.475)呈显著正相关,有效穗数与穗粒数(r=0.729)呈极显著正相关。多元回归分析表明,穗长、穗粒数和千粒重决定了产量66%的变异。通径分析结果表明,千粒重对产量的直接作用(P=0.485)和综合作用(P=0.615)最大,穗粒数次之(P=0.471,P=0.543)。聚类分析将参试小麦品系分为5类,其中第一类群的品系产量高,千粒重较高,其余农艺性状较协调,占比7.29%,是选育优良品系(种)的理想材料。抗逆性分析表明,超过66%的参试品系具有较强的抗寒性、耐旱性和抗倒伏特性,同时,超过55%的参试品系对条锈病、叶锈病和白粉病表现为免疫或高抗。【结论】参试品系的产量整体水平低而不稳,产量与有效穗数受环境影响较大,穗粒数和千粒重是影响陇东旱地小麦产量的主要因素,可通过同时增加穗粒数和千粒重提高产量,而且高产广适型冬小麦品种应具备较强的抗寒旱等综合抗逆性。

关键词：陇东区域试验旱地小麦农艺性状抗逆性

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KED-ICP-MS法测定电子级丙二醇甲醚中的银、镉和铅

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分析试验室 2024年第3期43卷 420-424页

作者：万曦刘涌郑玉婷陈辰郭登峰常州大学石油化工学院常州213164 江苏怡达化学股份有限公司无锡214441

建立了电感耦合等离子体质谱法(ICP-MS)测定电子级丙二醇甲醚中银(Ag)、镉(Cd)和铅(Pb)含量的方法。样品经超纯水稀释后直接进样,采用标准加入法作为定量方法,选择待测同位素为^(107)Ag,^(111)Cd,^(208)Pb,并通过选择检测模式和碰撞/反... 详细信息

建立了电感耦合等离子体质谱法(ICP-MS)测定电子级丙二醇甲醚中银(Ag)、镉(Cd)和铅(Pb)含量的方法。样品经超纯水稀释后直接进样,采用标准加入法作为定量方法,选择待测同位素为^(107)Ag,^(111)Cd,^(208)Pb,并通过选择检测模式和碰撞/反应池气体流量有效消除质谱干扰。结果表明,在碰撞模式下利用动能歧视技术(KED),He流量为4 mL/min时,质谱干扰消除效果最佳。该方法的线性范围为0.2~5μg/L,线性相关系数大于0.9995,各元素检出限(LODs)为0.002~0.009μg/L,加标回收率为93.8%~104.2%,相对标准偏差(RSDs)小于9.5%。使用KED-ICP-MS法可以准确测定电子级丙二醇甲醚中Ag,Cd和Pb的含量。

关键词：电感耦合等离子体质谱法(ICP-MS) 动能歧视(KED) 标准加入法电子级丙二醇甲醚金属元素银、镉和铅

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CPTA treatment reveals potential transcription factors associated with carotenoid metabolism in flowers of Osmanthus fragrans

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Horticultural Plant Journal 2021年第5期7卷 479-487页

作者： wan xi Yanhong He Linlin Zhu Shiyang Hu Shuyi xiong Yi Zhang Jingjing Zou Hongguo Chen Caiyun wang Riru Zheng Key Laboratory of Horticultural Plant Biology Ministry of EducationCollege of Horticulture and Forestry SciencesHuazhong Agricultural UniversityWuhan 430070China Key Laboratory of Urban Agriculture in Central China Ministry of Agriculture and Rural AffairsWuhan 430070China Hubei Engineering Research Center for Fragrant Plants Hubei University of Science and TechnologyXianningHubei 430070China

Osmanthus fragrans is one of the top ten traditional flowers in China.It is divided into three different groups according to its color.α-Carotene and β-carotene are the main determinants to distinguish the color differences between three groups.However,the dominant genes and transcription factors involved in carotenoid metabolism remain unclear.CPTA treatment(0.7mmol·L−1)remarkably promoted lycopene,α-carotene and β-carotene contents in flowers.Transcriptome sequencing analysis revealed that CPTA treatment could trigger chain reactions in carotenoid metabolism pathway genes.Four up-regulated and 10 down-regulated transcription factors which have close association with carotenoid variation were significantly induced by CPTA treatment.The up-regulated TFs such as MYB43,MYB123,HSF,were further subjected to transcript expression determination in different cultivars with drastic colors.Among them,transcript expression of four up-regulated TFs coincided with the carotenoid accumulation in different cultivars.We selected up-regulated OfMYB43 to verify its function,which is related to stress tolerance and transcriptional regulation.Transient overexpression of OfMYB43 in O.fragrans flowers showed that it could remarkably promote the expression of PDS,ZISO,LCYE and CCD4,leading to increased accumulation of β-branch carotenoids.OfMYB43 was a potential positive regulator of carotenoid biosynthesis in O.fragrans flowers.This study provides insight into the molecular mechanism of carotenoid metabolism in O.fragrans.

关键词： Osmanthus fragrans CPTA Carotenoid Transcriptome sequencing Transcription factor OfMYB43

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7~Be: A Geochemical Tracer for Seasonal Erosion of Surface Soil in Watershed of Lake Hongfeng, Guizhou, China

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Pedosphere 1996年第1期6卷 23-28页

作者： BAI ZHANGUO wan GUOJIANG wanG CHANGSHENG wan xi HUANGRONGGUI P.H. SANTSCHIZ and M. BASKARANZ(1￣State Key Lab. Of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences,Guiyang 550002 (China))(2￣Department Of Marine Scien State Key Lab. of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550005 China Department of Marine Sciences Texas a K M University Galveston TX 77551 United States

7Be penetrative depth in undisturbed surface soil is within 4mm.^7Be activity shows exponential decrease with soil depth,which is expressed as a diffusion process.7Be penetrative depth in undisturbed surface soil is apparently deeper in the fall (0.22-0.37g cm^-1) than in the spring (0.11-0.28g cm^-2) at the same site;Whereas,^7Be apparent activity at the top of surface soil is higher in the spring (0.3-2.2Bq g^-1)than in the fall (0.2-0.5Bqg^-1) at the same site,The 7Be inventory(189-544Bq m^-2)changes with both locations and seasons.Although the ^7Be flux to the earth's surface increases with amount of precipitation,its maximum inventory in the soil profiles decreases to 30%-40% after the rainy period.Calculated by the diffusion equation,the erosion and accumulation rates of soil particles are agreeable with the observation in situ,Which shows that the rates in fall are 1.5 times those in spring.The eroded soil particles almost all have been removed on the tablelands rathel than transported into the drainage system.This indicates that the soil erosion process in the karst region is only partial transportation within a short distance.

关键词：贵州红枫湖流域表土侵蚀季节性侵蚀地球化学示踪物铍7

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基于知识图谱的高校教学资料管理模型及相关算法研究

教育教学研究前沿

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教育教学研究前沿 2024年第1期2卷 80-83页

作者：王廷云万希福州大学福建福州350108

随着信息技术的不断发展,教学资料的管理变得越来越重要。传统的教学资料管理方式已经不能满足高校教学的需求,因此需要新的教学资料管理模型和相关算法。知识图谱作为一种新型的知识表示和管理方法,能够很好地解决教学资料管理中的结... 详细信息

随着信息技术的不断发展,教学资料的管理变得越来越重要。传统的教学资料管理方式已经不能满足高校教学的需求,因此需要新的教学资料管理模型和相关算法。知识图谱作为一种新型的知识表示和管理方法,能够很好地解决教学资料管理中的结构化和智能化问题。对此,本文首先阐述了知识图谱的基础,进而分析高校教学资料管理模型设计,在此基础上研究基于知识图谱的高校教学资料管理相关算法,以期为高校教学资料管理提供新的思路和方法。

关键词：知识图谱高校教学资料管理

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基于无人机倾斜摄影的广西桉树冠层碳储量计量模型构建

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林草资源研究 2024年第1期 88-94页

作者：朱赞王勇军王建琦许玉兰丘鑫琪万喜桂林航天工业学院航空宇航学院广西桂林541004 贵州大学资源与环境工程学院贵阳550025 广西高校无人机系统与技术应用重点实验室广西桂林541004

森林碳储量计量是在全球气候变暖背景下,实现“碳达峰”和“碳中和”目标的重要技术环节之一。目前常规的森林碳储量计量方法仍然主要采用传统的林业样地调查法,存在效率低、人力物力成本高,且对森林冠层数据的测定精度不高等问题。以... 详细信息

森林碳储量计量是在全球气候变暖背景下,实现“碳达峰”和“碳中和”目标的重要技术环节之一。目前常规的森林碳储量计量方法仍然主要采用传统的林业样地调查法,存在效率低、人力物力成本高,且对森林冠层数据的测定精度不高等问题。以无人机倾斜摄影测量技术在广西桉树冠层碳储量计量中的应用为研究对象,参考林业部门和各地的相关标准,采用实验对比和数理统计方法构建基于广西桉树冠层体积(V)推算其冠层碳储量(T)的计量模型。实验验证和回归分析方法测定该模型的拟合优度R^(2)达到0.889 6。该模型可为广西桉树林碳储量的调查工作,以及其他树种的碳储量计量模型构建提供参考。

关键词：碳储量计量桉树冠层无人机遥感倾斜摄影碳汇建模

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