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Headedness in Yorǘhbá: An Examination of the Deviant Value of Determiner Phrase
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作者 Issa O. Sanusi 《Sino-US English Teaching》 2014年第1期59-65,共7页
The issue of "headedness" is a product of Chomsky's (1988) notion of UG (Universal Grammar) that led to the development of a framework known as P&P (Principles and Parameters) theory. It is this theory we ha... The issue of "headedness" is a product of Chomsky's (1988) notion of UG (Universal Grammar) that led to the development of a framework known as P&P (Principles and Parameters) theory. It is this theory we have adopted for our analysis in this paper. The purpose of this paper is to examine the inconsistency in the value of Head Parameter with reference to the value of DP (determiner phrase) in Yorfib^i. As a native speaker of Yorfib~, the author has adopted an introspective method of data collection and used the intuitive knowledge of other native speakers of the language for necessary clarifications. Despite the fact that English and Yorfib~ are both head-initial, the structure of the NPs (noun phrases) in English shows that the head noun is always pre-modified, making the NP "head-final"--a violation of the value of Head Parameter in the language. This necessitated the need for Abney's (1987) DP hypothesis; in which the determiner heads its own phrase, thereby making a NP in English head-initial. This solves the problem of Head Parameter in English. However, since nouns in Yor/lb^i are post-modified, adopting "DP-analysis" will automatically produce head-final--a violation of the value of Head Parameter in the language. Given the inconsistency in the specification of head-complement order among the noun phrases in English and Yorfib~, this paper proposes to set a parameter for SVO (Subject-Verb-Object) languages with pre-modification (like English) to adopt "DP-analysis", and those with post-modification (like Yorfib^t) to adopt "NP-analysis". This will ensure "head-initial" value for the two categories of SVO languages 展开更多
关键词 headedness pre-modification post-modification DP-analysis NP-analysis English Yoruba
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Promoting People-to-People Bond among Countries along the Routes of the Belt and Road——Sidelights of CAFIU Delegation's Visit to Sri Lanka,Brunei and ROK Headed by Vice-President Zhang Baowen
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作者 Wang Xiaoyi 《International Understanding》 2015年第4期14-17,共4页
At the invitation of Sri Lanka-China Friendship Association(SLCFA),Brunei-China Friendship Association(BCFA)and National Strategy Institute of the ROK(NSI),Mr.Zhang Baowen,Vice-Chairman of NPC Standing Committee,Chair... At the invitation of Sri Lanka-China Friendship Association(SLCFA),Brunei-China Friendship Association(BCFA)and National Strategy Institute of the ROK(NSI),Mr.Zhang Baowen,Vice-Chairman of NPC Standing Committee,Chairman of the Central Committee of China Democratic League and 展开更多
关键词 LEAGUE Chairman INVITATION cooperation Standing exchanges exhibition DELEGATION headed Southeast
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Secretary-General Ni Jian Headed a Delegation to Visit ROK, Japan and Sri Lanka
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作者 Wang Lin Ma Jingjing 《International Understanding》 2013年第2期16-17,14-15,共4页
At the invitation of National Strategy Institute of ROK (NSI), Japan&China Technological Youth Interchange Society and Sri Lanka-China Friendship Association (SLCFA), CAFIU’s Secretary-General Ni Jian headed a fi... At the invitation of National Strategy Institute of ROK (NSI), Japan&China Technological Youth Interchange Society and Sri Lanka-China Friendship Association (SLCFA), CAFIU’s Secretary-General Ni Jian headed a five-member delegation to visit the three countries from March 24 to April 2. 展开更多
关键词 Secretary-General Ni Jian headed a Delegation to Visit ROK Japan and Sri Lanka NI
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Enhancing Understanding and Promoting Cooperation──a report on the visit to Algeria and Iran headed by NPC Vice-Chairman Jiang Zhenghua
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《International Understanding》 2001年第2期14-16,共3页
关键词 Enhancing Understanding and Promoting Cooperation a report on the visit to Algeria and Iran headed by NPC Vice-Chairman Jiang Zhenghua NPC
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President Zhou Tienong Headed a Delegation to Visit Hungary and Denmark
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作者 Ma Jingjing 《International Understanding》 2013年第3期37-39,共3页
At the invitation of the"World Bridge"Foundation of Hungary and the Danish-Chinese Business Forum,Mr.Zhou Tienong,ViceChairman of the Standing Committee of the 11th National People’s Congress and CAFIU’s P... At the invitation of the"World Bridge"Foundation of Hungary and the Danish-Chinese Business Forum,Mr.Zhou Tienong,ViceChairman of the Standing Committee of the 11th National People’s Congress and CAFIU’s President headed a CAFIU delegation to visit Hungary and Denmark from June 4 to 13,2013. 展开更多
关键词 World President Zhou Tienong headed a Delegation to Visit Hungary and Denmark
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Strengthen Understanding and Promote Cooperation——Highlights of Visit to Yugoslavia by Delegation Headed by Vice-President Yu Wen by Cao Rongfei
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《International Understanding》 1998年第Z1期4-5,共2页
InlateJune1998,a6memberCAFIUdelegationheadedbyVicePresidentYuWenpaidagoodwilvisittotheFederalRepublicofYugos... InlateJune1998,a6memberCAFIUdelegationheadedbyVicePresidentYuWenpaidagoodwilvisittotheFederalRepublicofYugoslavia.Thehost... 展开更多
关键词 YUGOSLAVIA DELEGATION headed to VISIT CAO
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Tan Zhiqiang Headed an Investigation Delegation to Fujian Province
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作者 Ren Yan 《China Textile》 2009年第5期14-15,共2页
On the invitation of the Straits Textile & Clothing Fair (STCF) committee of Shishi City,Fujian
关键词 OFFICE Tan Zhiqiang headed an Investigation Delegation to Fujian Province CPC
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Actively Promoting Regional Space Cooperation——Vice Administrator, Loan Enjie headed a delegation to attend the Second Asia-Pacific Conference on Multilateral Cooperation in Space Technology and Applications
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作者 Zhang Lihui 《Aerospace China》 1995年第1期14-15,共2页
A Chinese delegation of 24 persons headed by Mr. Luan Enjie, Vice Administrator of China National Space Administration (CNSA) attended the Second Asia-Pacific Conference on Multilateral Cooperation in Space Technology... A Chinese delegation of 24 persons headed by Mr. Luan Enjie, Vice Administrator of China National Space Administration (CNSA) attended the Second Asia-Pacific Conference on Multilateral Cooperation in Space Technology and Applications held at Islamabad, the Capital of Pakistan from April 22 to 26, 1995. Following the First AsiaPacific Workshop held in Beijing in December, 1992, and the First Asia-Pacific Conference on Multilateral Cooperation in 展开更多
关键词 Asia Loan Enjie headed a delegation to attend the Second Asia-Pacific Conference on Multilateral Cooperation in Space Technology and Applications Vice Administrator Actively Promoting Regional Space Cooperation
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基于YOLOv5的汽车液晶仪表图标符号检测方法研究
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作者 郭健忠 肖庆 +2 位作者 谢斌 闵锐 丁宁 《电子器件》 2025年第4期853-862,共10页
在汽车液晶仪表的自动化测试领域,机器视觉学习取代人工检测液晶仪表已成为趋势。针对现有方法存在检测环境苛刻、准确度低以及通用性差等问题,提出了一种基于YOLOv5的汽车液晶仪表图标符号检测方法,实现对仪表常用指示及报警图标符号... 在汽车液晶仪表的自动化测试领域,机器视觉学习取代人工检测液晶仪表已成为趋势。针对现有方法存在检测环境苛刻、准确度低以及通用性差等问题,提出了一种基于YOLOv5的汽车液晶仪表图标符号检测方法,实现对仪表常用指示及报警图标符号的自动化检测工作。该方法通过在YOLOv5网络模型基础上添加ECA注意力机制以减少图标符号周围冗余信息的干扰、采用轻量级通用上采样算子CARAFE扩大特征图的感受野、采用多尺度检测结构增加小图标符号的检测层、引入Dynamic Head模块提高对图标符号的感知能力,从而提高网络模型的检测准确度;同时使用SIoU Loss作为回归定位损失函数,以加快网络模型的收敛速度。与原始YOLOv5模型进行对比实验,结果显示改进模型在多种类的汽车液晶仪表图标符号检测上表现更好,mAP0.5和mAP0.5:0.95分别提高了3.1%和3.6%,达到了95.9%和76.8%,这为汽车液晶仪表图标符号的自动化检测工作提供了方法上的参考。 展开更多
关键词 YOLOv5 多尺度检测 CARAFE dynamic head 仪表图标检测
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基于TCGA数据库资料评估头颈鳞状细胞癌患者Klotho基因表达与临床预后的关系
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作者 张学聪 陈秉辉 +2 位作者 徐常艳 常方远 曹华 《中国耳鼻咽喉头颈外科》 2025年第1期48-50,共3页
目的探讨基于癌症基因组图谱(TCGA)数据库资料评估头颈鳞状细胞癌(head neck squamous cell carcinoma,HNSCC)患者Klotho基因表达对临床预后的影响。方法研究通过检索TCGA数据库收集HNSCC患者Klotho基因、微管相关蛋白轻链3(Microtubule... 目的探讨基于癌症基因组图谱(TCGA)数据库资料评估头颈鳞状细胞癌(head neck squamous cell carcinoma,HNSCC)患者Klotho基因表达对临床预后的影响。方法研究通过检索TCGA数据库收集HNSCC患者Klotho基因、微管相关蛋白轻链3(Microtubule-associated protein light chain 3,MAPLC3)、NOP2/Sun RNA甲基转移酶2(NOP2/Sun RNA methyltransferase 2,NSUN2)的表达及随访预后资料,根据Klotho基因表达水平分为低表达组(n=87例)、中表达组(n=87例)和高表达组(n=88例)。描绘Kaplan-Meier曲线分析Klotho基因表达对临床预后的影响,同时评价Klotho基因表达与MAPLC3及NSUN2的相关性。结果不同组别患者一般临床特征资料比较差异无统计学意义(P>0.05)。高表达组患者中位总生存率(overall survival,OS)显著高于低表达组(P<0.05)。与高表达组相比,低表达组风险比为0.62(95%CI:0.44~0.87,P<0.05)。HNSCC患者中Klotho基因与MAPLC3表达水平呈正相关(r=0.19,P=0.00),而与NSUN2表达水平呈负相关(r=-0.17,P=0.00)。结论Klotho基因表达与HNSCC患者临床预后有关,同时该基因可能影响下游MAPLC3及NSUN2的表达。 展开更多
关键词 头颈鳞状细胞癌(Squamous Cell Carcinoma of Head and Neck) 预后(Prognosis) Klotho基因(Klotho Gene) 微管相关蛋白轻链3(Microtubule-associated protein light chain 3) NOP2/Sun RNA甲基转移酶2(NOP2/Sun RNA methyltransferase 2)
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Aims and Scope
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《Chinese Journal of Polymer Science》 2025年第1期I0001-I0001,共1页
Chinese Journal of Polymer Science(CJPS)is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry,ChineseAcademy of Sciences."CJPSiseditedby a distingu... Chinese Journal of Polymer Science(CJPS)is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry,ChineseAcademy of Sciences."CJPSiseditedby a distinguished Editorial Board headed by Professor Qi-FengZhouand supported by an International Advisory Board in which many famous active polymerscientists all overtheworldare included.The. 展开更多
关键词 JOURNAL headed distinguished
原文传递
Chinese Journal of Polymer Science
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《Chinese Journal of Polymer Science》 2025年第3期I0001-I0003,共3页
Aims and Scope Chinese Journal of Polymer Science(CJPS)is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry,Chinese Academy of Sciences.CJPS is edited ... Aims and Scope Chinese Journal of Polymer Science(CJPS)is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry,Chinese Academy of Sciences.CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included.The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. 展开更多
关键词 JOURNAL headed distinguished
原文传递
基于YOLOv5s的复杂场景下高效烟火检测算法YOLOv5s-MRD 被引量:3
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作者 侯阳 张琼 +2 位作者 赵紫煊 朱正宇 张晓博 《计算机应用》 北大核心 2025年第4期1317-1324,共8页
现有的烟火检测方法主要依赖员工现场巡视,效率低且实时性差,因此,提出一种基于YOLOv5s的复杂场景下的高效烟火检测算法YOLOv5s-MRD(YOLOv5s-MPDIoU-RevCol-Dyhead)。首先,采用MPDIoU(Maximized Position-Dependent Intersection over U... 现有的烟火检测方法主要依赖员工现场巡视,效率低且实时性差,因此,提出一种基于YOLOv5s的复杂场景下的高效烟火检测算法YOLOv5s-MRD(YOLOv5s-MPDIoU-RevCol-Dyhead)。首先,采用MPDIoU(Maximized Position-Dependent Intersection over Union)方法改进边框损失函数,以适应重叠或非重叠的边界框回归(BBR),从而提高BBR的准确性和效率;其次,利用可逆柱状结构RevCol(Reversible Column)网络模型思想重构YOLOv5s模型的主干网络,使它具有多柱状网络架构,并在模型的不同层之间加入可逆链接,从而最大限度地保持特征信息以提高网络的特征提取能力;最后,引入Dynamic head检测头,以统一尺度感知、空间感知和任务感知,从而在不额外增加计算开销的条件下显著提高目标检测头的准确性和有效性。实验结果表明:在DFS(Data of Fire and Smoke)数据集上,与原始YOLOv5s算法相比,所提算法的平均精度均值(mAP@0.5)提升了9.3%,预测准确率提升了6.6%,召回率提升了13.8%。可见,所提算法能满足当前烟火检测应用场景的要求。 展开更多
关键词 目标检测 RevCol网络 YOLOv5 Dynamic head检测头 MPDIoU 烟火检测
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基于改进YOLOv8n模型的辣椒病害检测方法 被引量:2
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作者 李芳 危疆树 +2 位作者 王玉超 张尧 谢宇鑫 《江苏农业学报》 北大核心 2025年第2期323-334,共12页
为了解决辣椒病害检测速度慢,漏检率和误检率高的问题,本研究以YOLOv8n为基线模型,引入Adown下采样模块替代原模型骨干网络(Backbone)的卷积下采样层,引入SlimNeck模块将原模型颈部网络中的卷积层和特征聚合模块(C2f)替换为混合卷积模块... 为了解决辣椒病害检测速度慢,漏检率和误检率高的问题,本研究以YOLOv8n为基线模型,引入Adown下采样模块替代原模型骨干网络(Backbone)的卷积下采样层,引入SlimNeck模块将原模型颈部网络中的卷积层和特征聚合模块(C2f)替换为混合卷积模块(GSConv)和跨阶段部分网络(VoVGSCSP)模块,并利用辅助训练头Aux Head(Auxiliary head)融合原有的检测头,构建改进的YOLOv8n模型(YOLOv8n-ATA模型)。最后利用辣椒炭疽病、褐斑病、脐腐病和细菌性叶斑病等4种病害影像数据集对改进后的模型性能进行分析。结果表明,改进后模型的浮点计算量和模型大小比原YOLOv8n模型增加19.5%和10.2%,但模型对辣椒病害的识别精确率、平均精度均值mAP_(50)和mAP_(50∶95)分别提升2.6个百分点、2.9个百分点和2.9个百分点,同时每1 s传输帧数增加15.1%。因此,改进后的模型能够对辣椒病害进行有效识别,较好实现模型识别准确度与效率的平衡。 展开更多
关键词 辣椒病害 YOLOv8n模型 目标检测 Adown下采样模块 SlimNeck模块 Aux Head检测头
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SD-YOLO:一种多尺度小目标检测算法 被引量:1
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作者 赵滨淋 孙玲 +2 位作者 陈功 钟剑丹 付琳 《电光与控制》 北大核心 2025年第7期21-26,共6页
针对无人机航拍图像中小目标样本数量多且尺度变换范围大导致的漏检和误检现象严重等问题,提出一种基于YOLOv8s改进的小目标检测算法SD-YOLO。首先,使用DCNv2模块对C2f进行重构,使模型能够有效地捕捉目标的细粒度细节,自适应地调整卷积... 针对无人机航拍图像中小目标样本数量多且尺度变换范围大导致的漏检和误检现象严重等问题,提出一种基于YOLOv8s改进的小目标检测算法SD-YOLO。首先,使用DCNv2模块对C2f进行重构,使模型能够有效地捕捉目标的细粒度细节,自适应地调整卷积核的采样位置,从而能够准确地定位目标位置;其次,改进SPD-Conv模块,提升模型捕捉局部特征的能力,从而使模型能够保留更多的空间信息;最后,增加一个小目标检测头,并引入Dynamic head模块,提升模型在多尺度场景下的检测性能。在VisDrone2019数据集上的实验结果显示,SD-YOLO的mAP50为0.495,相较于原始YOLOv8s网络提升了0.1,并且能够保持较高帧率,对多尺度小目标的检测性能有显著提高。 展开更多
关键词 小目标检测 YOLOv8s 细粒度细节 Dynamic head
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改进YOLOv8的铸件多肉缺陷检测
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作者 刘琦 马行 穆春阳 《现代电子技术》 北大核心 2025年第11期131-135,共5页
针对铸造生产过程中铸件表面多肉缺陷数据集少、复杂环境下人工检测困难以及检测效率较低等问题,文中基于YOLOv8提出改进算法。对数据进行增强处理,以便提升模型的鲁棒性,更贴合实际环境;引入残差网络Resnet替换网络主干部分,提高模型... 针对铸造生产过程中铸件表面多肉缺陷数据集少、复杂环境下人工检测困难以及检测效率较低等问题,文中基于YOLOv8提出改进算法。对数据进行增强处理,以便提升模型的鲁棒性,更贴合实际环境;引入残差网络Resnet替换网络主干部分,提高模型提取目标特征的能力;对Neck部分进行重构,避免参数量的增加;在网络的输出末端加入具有注意力机制的Dynamic Head检测头,将模型对目标感知和表达的能力进一步提高;在训练模型能力过程中加入MPDIoU损失函数,强化模型对于目标边框的处理,提高模型对铸件多肉缺陷的识别精准度。实验结果表明,改进的YOLOv8模型在检测铸件多肉缺陷数据集上的mAP相比原模型提升2.2%,提升了小目标识别精度,正确检测率提高了16.1%。 展开更多
关键词 缺陷检测 铸件多肉缺陷 YOLOv8 注意力机制 Resnet Dynamic Head
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基于改进YOLOv8n的松材线虫病疫木检测方法
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作者 王余康 黄雷君 李洋 《林草资源研究》 北大核心 2025年第1期114-125,共12页
松材线虫病对全球松树资源和生态环境造成严重威胁,准确检测疫木对于控制疫情蔓延具有重要意义。借助无人机遥感技术,能够高效获取覆盖广泛、分辨率高的森林影像数据,为松材线虫病疫木检测提供了关键的数据支持。针对复杂森林环境下无... 松材线虫病对全球松树资源和生态环境造成严重威胁,准确检测疫木对于控制疫情蔓延具有重要意义。借助无人机遥感技术,能够高效获取覆盖广泛、分辨率高的森林影像数据,为松材线虫病疫木检测提供了关键的数据支持。针对复杂森林环境下无人机遥感影像中松材线虫病疫木检测识别能力受限的问题,提出一种改进的YOLOv8n检测模型(YOLOv8n-RCD)。使用RepVit作为主干网络,提升特征提取能力;通过引入跨尺度特征融合模块(CCFM),增强模型对多层次特征的提取;采用动态头(Dynamic Head)替换原有检测头,提高模型在复杂背景下的目标识别能力和适应性。结果表明:改进后的YOLOv8n-RCD在精确率(P)、召回率(R)和F1分数上比基准模型(YOLOv8n)分别提升了3.37%、3.00%和3.19%,AP50和AP50-95分别提升了1.93%和1.49%。改进后的模型提升了在复杂森林环境下的识别精度和能力,为松材线虫病疫木的精确化检测和无人机遥感驱动的智能化动态防控提供了有力的技术支持。 展开更多
关键词 目标检测 松材线虫病 YOLOv8n RepVit CCFM Dynamic Head
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大视场下火龙果目标检测与计数方法
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作者 欧阳春凡 高嘉正 +5 位作者 陈桥 曾春林 李文涛 肖明玮 罗陈迪 周学成 《中国农业科技导报(中英文)》 北大核心 2025年第8期100-109,共10页
为解决大视场条件下小目标火龙果识别精度低、实时性差、果实计数困难的问题,提出一种大视场下火龙果目标检测与计数方法,实现火龙果小目标精准识别与计数,完善火龙果机器人采前指导性工作。在目标特征提取阶段,采用动态可变形卷积C2F_D... 为解决大视场条件下小目标火龙果识别精度低、实时性差、果实计数困难的问题,提出一种大视场下火龙果目标检测与计数方法,实现火龙果小目标精准识别与计数,完善火龙果机器人采前指导性工作。在目标特征提取阶段,采用动态可变形卷积C2F_DCNV2_Dynamic替换YOLOv8主干网络的C2F模块,引入Conv_offer_mask获取输入特征图的可变形偏移和掩码,使网络能够更好地适应目标形状的特征,提升复杂背景的目标特征提取能力;以多路协调注意力(multipath coordinate attention,MPCA)机制模块对输入进行多路径处理,使模型可以同时关注输入张量的空间信息与通道信息,提高网络对不同尺度和语境的特征感知能力,进而提升小目标识别精度;在目标预测阶段,使用基于端到端Transformer的检测器RT-DETR的Decoder Head替换YOLO Head,通过集合预测方法直接对目标进行预测和关联,去除传统非极大抑制步骤,提高推理速度,进一步提升网络实时性能;在目标计数阶段,结合Deep Sort算法实现果实区域计数。结果表明,改进的目标检测网络对火龙果果实检测的平均精度可达99.0%,在实时性测试中每秒传输32帧,模型大小为11.8 MB,果实计数精度达82.96%,平均检测速度为17帧·s^(−1)。该方法能够精准识别与计数大视场条件下的小目标火龙果,且实时性满足果园实际生产环境。 展开更多
关键词 小目标火龙果识别 果实计数 YOLOv8 C2F_DCNV2_Dynamic MPCA Decoder Head
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Induced neural stem cells regulate microglial activation through Akt-mediated upregulation of CXCR4 and Crry in a mouse model of closed head injury 被引量:1
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作者 Mou Gao Qin Dong +3 位作者 Dan Zou Zhijun Yang Lili Guo Ruxiang Xu 《Neural Regeneration Research》 SCIE CAS 2025年第5期1416-1430,共15页
Microglial activation that occurs rapidly after closed head injury may play important and complex roles in neuroinflammation-associated neuronal damage and repair.We previously reported that induced neural stem cells ... Microglial activation that occurs rapidly after closed head injury may play important and complex roles in neuroinflammation-associated neuronal damage and repair.We previously reported that induced neural stem cells can modulate the behavior of activated microglia via CXCL12/CXCR4 signaling,influencing their activation such that they can promote neurological recovery.However,the mechanism of CXCR4 upregulation in induced neural stem cells remains unclear.In this study,we found that nuclear factor-κB activation induced by closed head injury mouse serum in microglia promoted CXCL12 and tumor necrosis factor-αexpression but suppressed insulin-like growth factor-1 expression.However,recombinant complement receptor 2-conjugated Crry(CR2-Crry)reduced the effects of closed head injury mouse serum-induced nuclear factor-κB activation in microglia and the levels of activated microglia,CXCL12,and tumor necrosis factor-α.Additionally,we observed that,in response to stimulation(including stimulation by CXCL12 secreted by activated microglia),CXCR4 and Crry levels can be upregulated in induced neural stem cells via the interplay among CXCL12/CXCR4,Crry,and Akt signaling to modulate microglial activation.In agreement with these in vitro experimental results,we found that Akt activation enhanced the immunoregulatory effects of induced neural stem cell grafts on microglial activation,leading to the promotion of neurological recovery via insulin-like growth factor-1 secretion and the neuroprotective effects of induced neural stem cell grafts through CXCR4 and Crry upregulation in the injured cortices of closed head injury mice.Notably,these beneficial effects of Akt activation in induced neural stem cells were positively correlated with the therapeutic effects of induced neural stem cells on neuronal injury,cerebral edema,and neurological disorders post–closed head injury.In conclusion,our findings reveal that Akt activation may enhance the immunoregulatory effects of induced neural stem cells on microglial activation via upregulation of CXCR4 and Crry,thereby promoting induced neural stem cell–mediated improvement of neuronal injury,cerebral edema,and neurological disorders following closed head injury. 展开更多
关键词 Akt signaling cerebral edema closed head injury Crry CXCR4 induced neural stem cell MICROGLIA NEUROINFLAMMATION
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基于YOLOv5n-CND的矿用输送带异物检测 被引量:2
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作者 孙奥然 赵培培 +2 位作者 杨迪 张君逸 于洪健 《工矿自动化》 北大核心 2025年第1期38-44,共7页
针对异物图像背景复杂、特征提取能力弱、粘连小目标的检测精度低、检测框定位及尺度失真等问题,提出了一种基于YOLOv5n-CND的矿用输送带目标检测算法。首先,采用C2f对特征金字塔进行优化,使用更少参数解决在井下异物图像采集背景复杂... 针对异物图像背景复杂、特征提取能力弱、粘连小目标的检测精度低、检测框定位及尺度失真等问题,提出了一种基于YOLOv5n-CND的矿用输送带目标检测算法。首先,采用C2f对特征金字塔进行优化,使用更少参数解决在井下异物图像采集背景复杂且存在复杂目标干扰对小目标检测不敏感的问题;然后,采用归一化高斯瓦萨斯坦距离(NWD)回归损失函数替代CIoU,改善多尺度异物检测效果不佳的问题,实现粘连小目标的精准检测;最后,添加目标检测头(Dy Head),将尺度、空间和任务3种注意力机制结合,提高对异物轮廓的特征提取能力,增强对多尺度目标的适应能力。实验结果表明:YOLOv5n-CND的mAP@0.5、mAP@0.5∶0.95、参数量及检测速度分别为87.9%,55.9%,4.49×106个,85.5帧/s,满足煤矿井下异物检测需求;YOLOv5n-CND的mAP@0.5和mAP@0.5∶0.95较YOLOv5n分别提高了2.6%和3.4%,较YOLOv5s-CBAM分别提高了1.7%和3.8%;模型参数量在YOLOv5n的基础上略有提升,但较其他模型参数量均有所降低。选取异物与背景相近的细长检测物、光照比较低的锚杆检测物、大量煤矸石混杂的检测物、含有多个异物4种场景进行测试,结果表明:基于YOLOv5n-CND的矿用输送带异物检测算法未出现误检及重复检测的情况,漏检较少,检测框定位准确,对粘连小目标的处理效果更好,能够实现输送带异物的准确检测。 展开更多
关键词 矿用输送带 异物检测 粘连小目标检测 YOLOv5n C2f模块 归一化高斯瓦萨斯坦距离模块 Dy Head检测头
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