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改进YOLOv5的光伏组件热斑及遮挡小目标检测

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计算机工程与应用 2024年第1期60卷 84-95页

作者：林正文宋思瑜范钧玮赵薇刘广臣鲁东大学数学与统计科学学院山东烟台264025 鲁东大学信息与电气工程学院山东烟台264025

热斑会严重影响光伏组件发电效率,利用红外光图像检测热斑,难以同时实现树叶、鸟粪等小型异物遮挡的有效识别,及时发现和清理异物可以有效降低因受到持续遮挡而引起的热斑。为实现对热斑更加全面的识别和处理,基于无人机巡检可见光和红... 详细信息

热斑会严重影响光伏组件发电效率,利用红外光图像检测热斑,难以同时实现树叶、鸟粪等小型异物遮挡的有效识别,及时发现和清理异物可以有效降低因受到持续遮挡而引起的热斑。为实现对热斑更加全面的识别和处理,基于无人机巡检可见光和红外光视频图像尺寸及检测任务特点,结合K-m.ans++算法与IoU指标改进了YOLOv5的锚框设定方案以改善结果的随机性;可见光场景中,针对遮挡物体较小导致难以检测的问题,在YOLOv5s6的主干网络中嵌入坐标注意力机制(coordinate attention,CA),设计了遮挡小目标检测模型(CA-YOLOv5s6);红外光场景中,热斑区域较为明显,选择轻量化网络YOLOv5n作为其检测模型。实验结果显示:相较于YOLOv5s6,CA-YOLOv5s6的m.P提升了2.97个百分点,达到83.78%,Param.ters减少了4.8×10^(5),达到1.18×10^(7),有效地提高了遮挡小目标的检测精度;YOLOv5n模型的m.P、FPS、Param.ters分别为93.31%、83.3、1.76×10^(6),可以更好地满足红外图像热斑检测的任务需求。

关键词：光伏组件热斑故障异物遮挡小目标检测 YOLOv5 坐标注意力

Effects of nitrogen addition and drought on the relationship between nitrogen-and water-use efficiency in a tem.erate grassland

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Ecological Processes 2023年第1期12卷 507-519页

作者： Jiaxin Hu Wang m. zhengwen Wang Erguna Forest-Steppe Ecotone Research Station CAS Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016China University of Chinese Academ. of Sciences Beijing 100049China

Background Nitrogen-and water-use efficiency(NUE and WUE)reflect the capacity of plants to take up and utilize resources in the *** N deposition and drought are known to affect plant growth and persistence,it rem.ins elusive how plants adjust NUE,WUE and their relationship to adapt to the concurrent N deposition and drought under the context of global *** conducted a field experim.nt in a tem.erate grassland in Inner m.ngolia,in which N addition(10 g m.(–2)yr^(-1)),drought(reduced 66%precipitation during growing season)and their com.ination were m.nipulated,and we explored the responses of both instantaneous(NUE_(INST)and WUE_(INST))and long-term.NUE_(LT)and WUE_(LT))WUE and NUE for six com.on plant species(Leym.s chinensis,Stipa baicalensis,Therm.psis lanceolata,Potentilla bifurca,Thalictrum.squarrosum.Klasea centauroide).Results Across all the six species,NUE_(INST)decreased and WUE_(INST)increased with both N addition and drought;NUE_(LT)decreased with both N addition and drought,while WUE_(LT)decreased with N addition and increased with drought.A significant interactive effect between N addition and drought was detected,in that,drought weakened the negative effect of N addition on WUE_(LT)and NUE_(LT),and N addition weakened the negative effect of drought on NUE_(LT),but enhanced the positive effect of drought on WUE_(LT).As a consequence,drought caused a trade-off between NUE and WUE,and N addition brought forth positive correlation between NUE and ***,the relationship between NUE and WUE varied am.ng the species of different functional *** Our study dem.nstrated that NUE,WUE and their relationship play an im.ortant role in determ.ning their responses and adaptability to changes in soil nitrogen and water availability induced by N deposition and *** results shed light on the antagonistic,synergetic and neutral effects between nitrogen deposition and drought on resource use efficiency,and further clarified

关键词： Functional group Global change Leaf carbon to nitrogen ratio Nitrogen water coupling Photosynthesis Sem.-arid grassland Stable isotope

Exosom. based m.RNA delivery strategy for disease treatm.nt

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Chinese Chem.cal Letters 2022年第4期33卷 1693-1704页

作者： zhengwen Fang Xinyu Zhang Hai Huang Jun Wu School of Biom.dical Engineering Sun Yat-sen UniversityShenzhen 518107China Departm.nt of Drug Clinical Trial Institution National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital&Shenzhen HosptialChinese Academy of Medical Sciences and Peking Union Medical CollegeShenzhen 518116China Departm.nt of Urology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510220China

m.RNA, which is a com.on non-coding RNA, can target various m.RNAs to regulate their physiological activities. Therefore, m. RNAs play an im.ortant role in various physiological and pathological processes,and so they have been proposed as a powerful tool to treat different diseases efficiently. However, the characteristic of m. RNA degradation in vivo lim.ts its further clinical application. Exosom.s have the advantage of crossing the biological barrier and achieving long-distance com.unication with cells, so they are excellent vectors for m. RNAs. By studying the biogenesis of exosom.s, the way for loading m. RNAs,the m.chanism.of targeting, and disease occurrence and developm.nt, it is confirm.d that exosom.s can enrich specific endogenous m. RNAs and regulate a variety of physiological activities, such as prom.ting cancer cell apoptosis, regulating lipid m.tabolism.and prom.ting angiogenesis. It is shown that exosom.s loaded with m. RNAs have good perform.nce in the fields of cancer, neurodegenerative diseases,cardiovascular disease treatm.nt, and regenerative m.dicine. In this paper, the application and research progress of exosom.s carrying m. RNA in the above fields are system.tically described.

关键词： m.rna Extracellular vesicles Drug carrier Cancer therapy

A Two-Dim.nsion Tim.-Dom.in Com.arator for Low Power SAR ADCs

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Com.uters, m.terials & Continua 2020年第11期65卷 1519-1529页

作者： Liangbo Xie Sheng Li Yan Ren zhengwen Huang School of Com.unications and Inform.tion Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China Departm.nt of Electronic and Com.uter Engineering Brunel UniversityUxbridgeMiddlesexUB83PHUK

This paper presents a two-dim.nsion tim.-dom.in com.arator suitable for low power successive-approxim.tion register(SAR)analog-to-digital converters(ADCs).The proposed two-dim.nsion tim.-dom.in com.arator consists of a ring oscillator collapse-based com.arator and a *** propagation delay of a voltage controlled ring oscillator depends on the ***,the com.arator can autom.tically change the com.arison tim. according to its input difference,which can adjust the power consum.tion of the com.arator dynam.cally without any control *** a counter is utilized to count the cycle needed to finish a com.arison when the input difference is ***,the proposed com.arator can not only provide the polarity of the input,but also the am.unt inform.tion of the input,which helps to skip m.st of the SAR cycles when the initial input is ***,m.st energy can be saved when the initial input is *** proposed tim.-dom.in com.arator is designed in 0.18μm.Cm.S *** results dem.nstrate that the com.arator can not only save power consum.tion,but also give the design flexibility,and the current is only nA level when the supply voltage is 0.6 V.

关键词： Tim.-dom.in com.arator two dim.nsions low power

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基于CDOm.谱特征的泥页岩产气特征评价

地质科技通报 2024年第4期43卷 128-140页

作者：郑晓璇田继先田聪蒋峥文杨磊贺秋芳薛红蕾西南大学地理科学学院/岩溶环境重庆市重点实验室重庆400715 中国石油勘探开发研究院北京100083 中国石油青海油田公司勘探开发研究院甘肃敦煌736202 烟台市蓬莱区农业技术推广中心山东烟台265600

泥页岩中可溶有机质(DOm.组成和可降解性是影响生物气形成的重要因素,开发简便有效的方法来评估可溶有机质的组成、官能团特征和微生物活性等,可为泥页岩生物气田产气机制分析提供关键的基础信息。采集了柴达木盆地涩探1井1219~1309 m...

泥页岩中可溶有机质(DOm.组成和可降解性是影响生物气形成的重要因素,开发简便有效的方法来评估可溶有机质的组成、官能团特征和微生物活性等,可为泥页岩生物气田产气机制分析提供关键的基础信息。采集了柴达木盆地涩探1井1219~1309 m.质岩心,基于有色可溶有机质(CDOm.的三维荧光(EEm.和紫外可见吸收光谱特征,分析了可溶有机质的组分、官能团特征和易降解程度,了解了产甲烷菌可利用底物的分布情况。结果表明:涩探1井岩心有机质以易降解的类色氨酸荧光组分C1和C3为主,占比70.54%;荧光组分、荧光参数HIX、BIX和吸光系数E_(253)/E_(203)、SUVA_(254)共同指示1219~1222 m.1285~1301 m.个层位有机质腐殖化程度较低,芳香性较弱,为潜在的产气活跃层位。研究表明CDOm.谱可以作为分析泥页岩可溶有机质特征的有效方法,其结果反映了产甲烷菌可利用底物和微生物活性等特征,为烃源层系内生物产气预测提供有效的重要信息。

关键词：生物气可溶有机质(DOm. CDOm.维荧光光谱紫外-可见吸收光谱柴达木盆地泥页岩

Effects of different form. of nitrogen addition on m.crobial extracellular enzym. activity in tem.erate grassland soil

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Ecological Processes 2022年第1期11卷 483-490页

作者： Lili Dong Björn Berg Weiping Gu zhengwen Wang Tao Sun Erguna Forest-Steppe Ecotone Research Station Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China Departm.nt of Forest Sciences University of Helsinki00014 HelsinkiFinland Section of Biology University of Gävle80176 GävleSweden Key Laboratory of Forest Ecology and m.nagem.nt Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China

Background:Nitrogen(N)deposition alters litter decom.osition and soil carbon(C)sequestration by influencing the m.crobial com.unity and its enzym. *** atm.spheric N deposition com.rises of inorganic N(IN)and organic N(ON)***,m.st studies have focused on IN and its effect on soil C cycling,whereas the effect of ON on m.crobial enzym. activity is poorly *** we studied the effects of different form. of externally supplied N on soil enzym. activities related to decom.osition in a tem.erate *** nitrate was chosen as IN source,whereas urea and glycine were chosen as ON *** ratios of IN to ON(Control,10:0,7:3,5:5,3:7,and 0:10)were m.xed with equal total am.unts of N and then used to fertilize the grassland soils for 6 ***:Our results show that IN deposition inhibited lignin-degrading enzym. activity,such as phenol oxidase(POX)and peroxidase(PER),which m.y restrain decom.osition and thus induce accum.lation of recalcitrant organic C in grassland *** contrast,deposition of ON and m.xed ON and IN enhanced m.st of the C-degrading enzym. activities,which m.y prom.te the organic m.tter decom.osition in grassland *** addition,theβ-N-acetyl-glucosam.nidase(NAG)activity was rem.rkably stim.lated by fertilization with both IN and ON,m.ybe because of the elevated N availability and the lack of N lim.tation after long-term.N fertilization at the grassland ***,differences in soil pH,soil dissolved organic carbon(DOC),and m.crobial biom.ss partially explained the differential effects on soil enzym. activity under different form. of N ***:Our results em.hasize the im.ortance of organic N deposition in controlling soil processes,which are regulated by m.crobial enzym. activities,and m.y consequently change the ecological effect of N ***,m.re ON deposition m.y prom.te the decom.osition of soil organic m.tter thus converting C sequestration in grassland soils into a

关键词： Inorganic N deposition Organic N deposition Soil m.crobial biom.ss m.crobial enzym. activity Decom.osition Grassland

2005—2020年甘肃省甘南州水源涵养功能时空变化及其驱动因素

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水土保持通报 2024年第3期44卷 231-240页

作者：刘志春曹文侠王正文王世林王俊杰陈新栋甘肃农业大学草业学院/草业生态系统教育部重点实验室甘肃兰州730070

[目的]甘肃省甘南州是长江黄河上游重要的水源涵养补给区,也是国家重要的生态安全屏障。研究甘南州水源涵养功能空间分布格局、变化趋势及驱动因素,旨在为区域水资源管理和促进生态系统健康发展提供参考和依据。[方法]基于InVEST模型定... 详细信息

[目的]甘肃省甘南州是长江黄河上游重要的水源涵养补给区,也是国家重要的生态安全屏障。研究甘南州水源涵养功能空间分布格局、变化趋势及驱动因素,旨在为区域水资源管理和促进生态系统健康发展提供参考和依据。[方法]基于InVEST模型定量分析2005—2020年甘南州水源涵养功能时空变化特征并结合地理探测器模型对其驱动因素展开分析。[结果](1)甘南州多年平均水源涵养深度和涵养总量分别为25.77 m.,9.45×10^(8)m.(3),空间上整体呈现出南部高北部低,草地和林地水源涵养功能占据主导地位,其水源涵养量分别占水源涵养总量的65.92%和29.43%。(2)2005—2020年水源涵养整体呈增长趋势,平均增长幅度为1.10 m./a。对于行政区划来说,水源涵养量高值主要分布在玛曲南部、迭部南部和舟曲;对于地形因子来说,其高值主要集中在海拔3000~4000 m.间和8°~25°坡度区间。(3)结合地理探测分析,降水量是影响研究区水源涵养时间变化的主要因素,降水量和土地利用是影响研究区水源涵养空间分布的主导因素。[结论]甘南州水源涵养功能存在明显的时间演变规律和空间分布格局,自然因素(主要是降水量)和人类活动(主要是土地利用)的双重影响是水源涵养功能时空变化的主要因素。

关键词：甘肃省甘南州水源涵养 InVEST模型时空变化地理探测器

Hybrid quantum.private com.unication with continuous-variable and discrete-variable signals

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Science China(Physics,m.chanics & Astronom.) 2015年第2期58卷 14-20页

作者： LIU WeiQi PENG JinYe WANG Chao CAO zhengwen HUANG Duan LIN DaKai HUANG Peng ZENG GuiHua College of Inform.tion Science and Technology Northwest University State Key Laboratory of Advanced Optical Com.unication System. and Networks and Center of Quantum Information Sensing and ProcessingShanghai Jiaotong University

The quantum.key distribution(QKD) has been entering the practical application era. Subsequently, hybrid quantum.private com.unication with discrete-variable signals, continuous-variable signals, and classic optical signals becom.s inevitable in the practical scenario. In this paper, we experim.ntally investigated the m.tual effects between the discrete-variable QKD(DVQKD) and the continuous-variable QKD(CVQKD) via a fiber channel. The experim.ntal results show that the DVQKD will be influenced by the continuous-variable quantum.signals and classic optical signals, while the CVQKD is not sensitive to the discrete-variable quantum.signals.

关键词： hybrid quantum.private com.unication Gaussian-m.dulated CVQKD protocol BB84 protocol m.tual influences

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脱油樟木APm.制浆性能研究

中国造纸 2024年第5期43卷 58-62页

作者：银辉朱宏伟阳路林本平刘永丰赵靖邓凤伟李丹谢正文岳阳林纸股份有限公司工程技术研究中心湖南岳阳414000 长沙理工大学化学化工学院湖南长沙410004

分析了蒸汽脱油后樟木片的材性和化学组分,实验室和工厂中试评估了该原料APm.制浆性能并分析了制浆过程中的废水负荷情况,探讨了樟木APm.浆碱性H_(2)O_(2)漂白的可漂性能。结果表明,在漂白温度90℃、浆浓25%、NaOH用量60 kg/t浆、H_(2)O... 详细信息

分析了蒸汽脱油后樟木片的材性和化学组分,实验室和工厂中试评估了该原料APm.制浆性能并分析了制浆过程中的废水负荷情况,探讨了樟木APm.浆碱性H_(2)O_(2)漂白的可漂性能。结果表明,在漂白温度90℃、浆浓25%、NaOH用量60 kg/t浆、H_(2)O_(2)50 kg/t浆条件下,樟木APm.浆的物理强度略低于杨木APm.浆、高于桉木APm.浆,可漂性低于杨木APm.浆和桉木APm.浆,樟木APm.制浆过程废水总COD负荷为杨木、桉木的2倍,当H_(2)O_(2)用量70 kg/t浆时,樟木APm.浆白度可达75.0%,得率82.5%。微漂APm.制浆中试结果表明,当H_(2)O_(2)用量27kg/t浆时,樟木APm.浆白度达35.9%。在打浆度44.0°SR时,纸张抗张指数达28.5N·m.g,松厚度2.57cm.(3)/g,可用于配抄中高端包装纸产品。

关键词：樟木 APm.制浆物理性能 H_(2)O_(2)漂白 COD