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YOLOv5框架下的飞机蒙皮铆接缺陷检测

组合机床与自动化加工技术 2023年第7期 106-109页

作者：魏英姿苏迈沈阳理工大学信息科学与工程学院沈阳110159

飞机蒙皮制孔及铆接质量的视觉辅助检测是飞机装配过程的关键环节,为提高其智能检测效率和精度,提出改进YOLOv5模型的飞机蒙皮铆接装配缺陷的检测方法。研究蒙皮制孔、铆接质量等,执行多种特征缺陷检测。为减少数据增强过程中计算损耗,... 详细信息

飞机蒙皮制孔及铆接质量的视觉辅助检测是飞机装配过程的关键环节,为提高其智能检测效率和精度,提出改进YOLOv5模型的飞机蒙皮铆接装配缺陷的检测方法。研究蒙皮制孔、铆接质量等,执行多种特征缺陷检测。为减少数据增强过程中计算损耗,避免训练过程中过拟合现象,引入随机数据增强策略作数据增广,采用强化学习方法确定随机搜索策略的超参数,可提升深度学习的数据驱动性能;更改损失函数为α-CIoU函数,并使用非极大抑制软计算方法(soft-NMS)进行预测框的筛选,以避免漏检情况,提高多种缺陷检测判别的准确性;最后将YOLOv5改进前、后算法进行对比实验。实验结果表明,在检测速度上单张图片检测时间可达到1.78 s,检测平均精度均值提升了16.4%,达到94.6%,精确率提升18.8%,达到90.7%,满足飞机批量化检测的精度要求和实时检测需求。

关键词：飞机蒙皮制孔质量铆接阶差缺陷检测数据增强 YOLOv5模型

Calculation Method and Simulation of Air Bleeding Loss for Aircraft Start System

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Calculation Method and Simulation of Air Bleeding Loss for A...

Characteristics of super drought in Southwest China and the associated compounding effect of multiscalar anomalies

第37届中国控制会议

作者： San mai su Sen Li Jun Ma School of Power and Energy Northwestern Polytechnical University

The large aircraft air starting system is driven by compressed air from auxiliary power unit（APU）, which flow to air turbine starter（ATS） through air bleed pipeline to blows the air turbine starter and turns the main engine to start. As the basis of matching calculation and control of starting system components, at the same time, providing the basis for the exits air bleed flow rate and pressure control of APU, the calculation method of pressure and temperature loss of the bleed pipeline of aircraft starting system is analyzed, and aircraft start system air bleed model is established in Flowmaster environment, and under different operating parameters,the loss of total pressure and temperature is simulated.

关键词： Aircraft air turbine starting system Air bleed pipeline Total pressure and temperature loss Flowmaster

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Science China Earth Sciences 2024年第7期67卷 2084-2102页

作者： Lin WANG Wen CHEN Gang HAUNG Ting WANG Qiulin WANG Xiaoyun su Zixuan REN Chakrit CHOTAMONSAK Atsamon LIMSAKUL Kritanai TORSRI CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province Chengdu 610072China Department of Atmospheric Science Yunnan UniversityKunming 650500China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Carbon Neutrality Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Hangzhou Meteorological Bureau Hangzhou 310051China Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Geography Faculty of Social SciencesChiang Mai UniversityChiang Mai 50200Thailand Environmental Science Research Center Faculty of ScienceChiang Mai UniversityChiang Mai 50200Thailand Climate Change and Environmental Research Center TechnopolisKlong 5Klong LuangPathumthani 12120Thailand Hydro-Informatics Innovation Division Hydro-Informatics InstituteMinistry of Higher EducationScienceResearch and InnovationBangkok 10900Thailand

In recent decades,Southwest China(SWC)has suffered from frequent super droughts,leading to severe economic losses and ecological *** study investigates the characteristics of super droughts in SWC during 1961-2022,reveals the compounding effect of multiscalar anomalies,and explores the plausible atmospheric circulation mechanisms *** nature of super drought is a compound drought caused by the superposition of extreme drought events across multiple time *** contrasting the typical drought cases in 2006 and 2022,the decisive role of multiscalar drought compounding is *** on the Comprehensive Multiscalar Index(CMI),multiple super drought events in SWC were identified to be temporally clustered during *** them,the decadal background of enhanced evaporation and precipitation deficit at long time scales is a necessary condition for shaping the overall pattern of super droughts,while the precipitation and evaporation anomalies at short time scales trigger the outbreak of super droughts,determining the exact timing of *** events include August-September 2006,November 2009 to May 2010,July-October 2011,April-May 2012,January-April 2013,*** results suggest that the contribution of superposed precipitation anomalies to super drought is 2.4 times that of *** regards the circulation mechanisms affecting multiscalar precipitation,the anomalous spatial patterns at short-term and long-term scales are similar,featuring the cyclonic circulation over the South China Sea and the northeasterly wind anomalies together with the subsidence center over *** 2006-2014,the possible causes for the cross-seasonal persistent precipitation reduction in SWC are the extreme negative phase of the Pacific Decadal Oscillation(PDO)in the North Pacific as well as the pronounced warming of the warm pool in the western *** key dynamic processes are outlined as *** the one hand,the negative PDO p

关键词： super drought Multiscalar Compounding effect Mechanism analysis Southwest China

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创伤致截肢患者术前焦虑的护理干预及效果评价

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中国实用护理杂志 2012年第23期28卷 3-5页

作者：苏麦针吴立青山东省滨州市滨城区人民医院山东省滨州市滨城区256651

目的探讨护理干预对减轻创伤致肢体截除患者术前焦虑的效果。方法对30例创伤致肢体截除患者自入院至手术时由专人对患者存在的心理问题进行针对性护理干预，分别向患者告知病情，在向患者通知手术10min后及术前10min内采用焦虑自评量表... 详细信息

目的探讨护理干预对减轻创伤致肢体截除患者术前焦虑的效果。方法对30例创伤致肢体截除患者自入院至手术时由专人对患者存在的心理问题进行针对性护理干预，分别向患者告知病情，在向患者通知手术10min后及术前10min内采用焦虑自评量表（SAS）测评并比较干预前后的焦虑水平。结果经护理干预后，患者的焦虑程度较入院时减轻。结论加强护理干预能有效降低创伤致肢体截除患者术前的焦虑程度，提高治疗的主动性和依从性。

关键词：肢体截除术焦虑护理

Public Opinions on ChatGPT:An Analysis of Reddit Discussions by Using Sentiment Analysis,Topic Modeling,and SWOT Analysis

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Data Intelligence 2024年第2期6卷 344-374页

作者： Shwe Zin su Naing Piyachat Udomwong International College of Digital Innovation and Financial Technology 239 Nimmanhaemin Road SuthepMuangChiang Mai 50200Thailand

The sudden arrival of AI(Artificial Intelligence) into people's daily lives all around the world was marked by the introduction of ChatGPT, which was officially released on November 30, 2022. This AI invasion in our lives drew the attention of not only tech enthusiasts but also scholars from diverse fields, as its capacity extends across various fields. Consequently, numerous articles and journals have been discussing ChatGPT, making it a headline for several topics. However, it does not reflect most public opinion about the product. Therefore, this paper investigated the public's opinions on ChatGPT through topic modelling, Vader-based sentiment analysis and SWOT analysis. To gather data for this study, 202905 comments from the Reddit platform were collected between December 2022 and December 2023. The findings reveal that the Reddit community engaged in discussions related to ChatGPT, covering a range of topics including comparisons with traditional search engines, the impacts on software development, job market, and education industry, exploring ChatGPT's responses on entertainment and politics, the responses from Dan, the alter ego of ChatGPT, the ethical usage of user data as well as queries related to the AI-generated images. The sentiment analysis indicates that most people hold positive views towards this innovative technology across these several aspects. However, concerns also arise regarding the potential negative impacts associated with this product. The SWOT analysis of these results highlights both the strengths and pain points, market opportunities and threats associated with ChatGPT. This analysis also serves as a foundation for providing recommendations aimed at the product development and policy implementation in this paper.

关键词： ChatGPT Sentiment analysis Topic modeling SWOT analysis Public opinion Reddit

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优化注塑成型塑件变形方案的研究进展

高分子通报 2024年第2期37卷 215-228页

作者：陈家达李建伟席晨斐姜苏俊麦杰鸿金发科技股份有限公司企业技术中心珠海万通特种工程塑料有限公司广州510700

塑件翘曲变形是注塑成型常见的质量缺陷之一,吸引诸多学者和工程从业者对其提出层出不穷的优化思路。本文从工业量产角度出发,将塑件分为图纸阶段、试制阶段以及最终量产阶段,并系统介绍其在不同阶段的优化思路。首先介绍薄壁塑件和非... 详细信息

塑件翘曲变形是注塑成型常见的质量缺陷之一,吸引诸多学者和工程从业者对其提出层出不穷的优化思路。本文从工业量产角度出发,将塑件分为图纸阶段、试制阶段以及最终量产阶段,并系统介绍其在不同阶段的优化思路。首先介绍薄壁塑件和非规整塑件翘曲变形的优化思路,分类详述新模温技术在优化塑件翘曲变形的应用以及总结预变形技术现今的研究热点,并提出动模温技术结合人工智能算法求解能够在未来有更长远的发展。通过梳理后制程定型思路优化塑件翘曲变形相关文献,本文认为其具有一定局限性。最后介绍成型技术在优化塑件翘曲变形和低翘曲规格材料的新应用,并且基于当前行业背景,提出联合仿真技术和在线检测技术是解决塑件翘曲变形的未来研究方向和技术发展趋势。

关键词：注塑成型塑件变形优化方案进展

内蒙古东部部分奶牛场奶牛乳房炎金黄色葡萄球菌的分离鉴定及毒力基因检测

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中国病原生物学杂志 2022年第4期17卷 415-419,424页

作者：蒙小刚刘嘎吕香玉郭双麦拉苏李偲王永强刘锴温树波内蒙古民族大学动物科技学院内蒙古通辽028000 内蒙古自治区肉牛疾病防控工程技术研究中心内蒙古民族大学人畜共患病研究院

目的检测内蒙古东部奶牛场奶牛乳房炎金黄色葡萄球菌感染情况,并鉴定其毒力基因携带情况。方法采集61份临床型乳房炎奶牛的牛奶样品进行金黄色葡萄球菌的分离鉴定。利用PCR方法检测分离株金黄色葡萄球菌的nuc、clfA、fnbA、fnbB、tsst-1... 详细信息

目的检测内蒙古东部奶牛场奶牛乳房炎金黄色葡萄球菌感染情况,并鉴定其毒力基因携带情况。方法采集61份临床型乳房炎奶牛的牛奶样品进行金黄色葡萄球菌的分离鉴定。利用PCR方法检测分离株金黄色葡萄球菌的nuc、clfA、fnbA、fnbB、tsst-1、sea、seb、sec、sed、seg、see、seh、sei、和sej 14种毒力基因,并对其中1株进行16S rRNA基因序列分析、生化检测、药敏试验以及动物致病性试验。结果成功分离到20株金黄色葡萄球菌。从分离菌中共检测到11种毒力基因,其中nuc、clfA、fnbB、sea、sed、sei 6种毒力基因检出率均超过50%。随机挑选1株分离菌,将其命名为TLXG01。16S rRNA基因序列分析显示,分离菌与已报道的MF511713.1 H2处于同一分支且相似度均高于99%。药敏敏验显示,该分离菌对14种常用抗生素敏感,对多粘菌素和链霉素耐药。动物致病性试验显示,该分离株对小鼠具有较强的致病性。结论内蒙古东部5个奶牛场乳房炎奶牛均有金黄色葡萄球菌感染,该病原菌携带毒力基因的数量和种类不同,且存在多种毒力基因组合,可为当地奶牛场奶牛金黄色葡萄球菌性乳房炎的防治提供参考。

关键词：奶牛乳房炎金黄色葡萄球菌分离鉴定毒力基因

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银杉愈伤组织诱导植株再生的影响因素

林业科学 2024年第7期60卷 56-64页

作者：买凯乐李荣珍刘宏覃琨兰健花朱昌叁冯立新苏杰南周全连广西生态工程职业技术学院广西珍贵乡土树种良种培育中心柳州545004 广西桂林花坪国家级自然保护区管理局桂林541700 广西大瑶山国家级自然保护区管理局金秀545700 广西壮族自治区林业科学研究院南宁530002

[目的]探索银杉成熟胚愈伤组织诱导植株再生的影响因素,为阐明影响诱导银杉愈伤组织、不定芽等的机制提供帮助。[方法]以广西金秀和广西桂林2个种源的银杉成熟胚为试验材料,利用1/2 MS、DCR、P6培养基,分别添加0.5、1.0、1.5 mg·L^(−1)... 详细信息

[目的]探索银杉成熟胚愈伤组织诱导植株再生的影响因素,为阐明影响诱导银杉愈伤组织、不定芽等的机制提供帮助。[方法]以广西金秀和广西桂林2个种源的银杉成熟胚为试验材料,利用1/2 MS、DCR、P6培养基,分别添加0.5、1.0、1.5 mg·L^(−1)的6-BA,0.2、0.4、0.6 mg·L^(−1)的NAA和0.5、1.0、1.5 mg·L^(−1)的IBA,诱导银杉愈伤组织、不定芽和不定根,得到银杉再生植株;分析银杉种源、培养基、植物生长调节剂等对银杉愈伤组织、不定芽、不定根诱导率和增殖壮芽率的影响。[结果]广西桂林种源银杉愈伤组织、不定根诱导率和增殖壮芽率最大,分别为66.48%,21.43%和55.00%。广西金秀种源银杉不定芽诱导率最大,为73.33%。适合银杉愈伤组织诱导植株再生的培养基和植物生长调节剂对于愈伤组织为DCR+0.5 mg·L^(−1)6-BA,对于不定芽为DCR+1.5 mg·L^(−1)6-BA,对于不定根为1/2 MS+0.2 mg·L^(−1)NAA+0.5 mg·L^(−1)IBA,对于增殖壮芽为DCR+1.0 mg·L^(−1)6-BA+0.4 mg·L^(−1)NAA。[结论]广西桂林种源银杉整体诱导率和增殖率相比广西金秀种源高。DCR培养基对银杉愈伤组织和不定芽诱导具有显著促进效果,1/2 MS培养基对不定根诱导具有显著促进效果。6-BA既可诱导银杉愈伤组织和又可诱导不定芽,NAA和IBA组合可诱导出银杉不定根,6-BA和NAA组合可对银杉不定芽进行增殖壮芽。

关键词：银杉濒危物种成熟胚愈伤组织不定芽诱导植株再生

慢性心力衰竭患者血清基质金属蛋白酶9的变化及辛伐他汀干预对其的影响

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中国煤炭工业医学杂志 2008年第12期11卷 1834-1835页

作者：苏迈王宁广西南宁市红十字会医院内科 530021

MMP-9又称明胶酶B(gelatinase B),是MMP家族中分子结构最复杂者,主要功能是降解破坏细胞外基质中最主要的组成Ⅳ、Ⅴ型胶原和明胶[1].本研究采用测定慢性心力衰竭(CHF)患者血清的MMP-9水平及治疗前后血清MMP-9的变化的方法,探讨MMP-9在... 详细信息

MMP-9又称明胶酶B(gelatinase B),是MMP家族中分子结构最复杂者,主要功能是降解破坏细胞外基质中最主要的组成Ⅳ、Ⅴ型胶原和明胶[1].本研究采用测定慢性心力衰竭(CHF)患者血清的MMP-9水平及治疗前后血清MMP-9的变化的方法,探讨MMP-9在CHF发生和发展机制中的作用和意义,以及辛伐他汀在CHF治疗中的作用,报告如下.

关键词：心力衰竭基质金属蛋白酶9 辛伐他汀