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基于CE-YOLOv5s的安全帽检测算法

计算机与现代化 2024年第4期 55-59,98页

作者：王志波马晗冯锦梁刘国名东华理工大学信息工程学院江西南昌330013

在环境复杂的施工现场,存在较多危险因素,保护工人的生命安全成为焦点。由于施工现场杂乱的环境和固定的信息采集点,使得安全帽佩戴检测存在漏检和错检问题。因此本文提出一种基于CE-YOLOv5s的安全帽检测算法。该算法将SE注意力机制与C... 详细信息

在环境复杂的施工现场,存在较多危险因素,保护工人的生命安全成为焦点。由于施工现场杂乱的环境和固定的信息采集点,使得安全帽佩戴检测存在漏检和错检问题。因此本文提出一种基于CE-YOLOv5s的安全帽检测算法。该算法将SE注意力机制与C3模块融合,将原网络中C3模块替换,给关键特征赋予更高的权重,抑制一般特征。将一种基于双向特征金字塔网络(BiFPN)的对象检测神经网络引入,同时进行向上和向下的特征融合,为每一个通道添加额外权重,更好地保留低分辨率图像下的细节信息;引入SIoU损失函数,提高边界框定位准确度,加快收敛速度。实验结果表明,改进后的网络模型在精确率、召回率、mAP@0.5和mAP@0.5:0.95上有明显提升,有效提高了安全帽的检测精度,并改善了对杂乱背景下的小目标和被遮挡目标的检测准确率。将本文算法应用于施工场地可以及时检测工人是否做好保护措施,更好地保护工人的生命安全。

关键词：安全帽检测 YOLOv5 注意力机制 BiFPN SIoU

Comments on the planation surface once more

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Chinese Science Bulletin 2002年第10期47卷 793-797页

作者： CUI Zhijiu LI Dewen feng jinliang LIU Gengnian Department of Urban and Environmental Sciences Peking UniversityBeijing 100871China Department of Urban and Resources Nanjing UniversityNanjing 210093China Institute of Geography Hebei Academy of SciencesShijiazhuang 050011China

The authors reviewed the research of planation surface in recent years and commented on the development of method and theory about the planation surface. Some aspects of research, such as the restrictive planation surface, the karst planation surface, the fossil planation surface, the dating of weathering crust, the research of weathering crust and environmental evolution, extremely enriched the method and theory of the planation surface. Besides, the authors pointed out that we must take further steps to study the following issues: the deformation of planation surface, the original height of planation surface, the recognition and contrast of the planation surface. The weathering crust and planation surface should be regarded as a whole, and it will still be a principal aspect in the future.

关键词： planation surface topographic evolution research method dating of weathering crust.

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聚丙烯的亲水改性与性能研究

当代化工研究 2024年第13期 52-54页

作者：刘啸天冯金良汪乃东东莞理工学院广东523808 莞巨正源科技有限公司广东523987

本文在概述聚丙烯改性技术的基础上,针对聚丙烯亲水性差的问题,采用共混改性技术制备亲水聚丙烯样品,并测试改性、未改性样品力学性能和亲水表征。经研究发现,共混改性亲水PP与未改性PP力学性能基本一致。亲水PP接触角、滴水观察、分散... 详细信息

本文在概述聚丙烯改性技术的基础上,针对聚丙烯亲水性差的问题,采用共混改性技术制备亲水聚丙烯样品,并测试改性、未改性样品力学性能和亲水表征。经研究发现,共混改性亲水PP与未改性PP力学性能基本一致。亲水PP接触角、滴水观察、分散实验均优于未改性PP。根据实验结果表明,采用共混改性亲水聚丙烯亲水性能良好。

关键词：聚丙烯共混改性亲水PP 接触角

花旗松素调节MCP-1/CCR2轴对急性淋巴细胞白血病细胞恶性进展的影响

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现代肿瘤医学 2024年第5期32卷 799-804页

作者：王瑞娟李超段丽娟秦凡冯金梁南阳市中心医院血液内科河南南阳473000

目的:研究花旗松素(Taxifolin)对急性淋巴细胞白血病(ALL)细胞恶性进展的影响及单核细胞趋化蛋白-1(CCL2)/CC趋化因子受体2(CCR2)轴发挥的作用。方法:体外培养ALL-T淋巴细胞CCRF-CEM;CCK-8法检测不同浓度Taxifolin对CCRF-CEM细胞活力影... 详细信息

目的:研究花旗松素(Taxifolin)对急性淋巴细胞白血病(ALL)细胞恶性进展的影响及单核细胞趋化蛋白-1(CCL2)/CC趋化因子受体2(CCR2)轴发挥的作用。方法:体外培养ALL-T淋巴细胞CCRF-CEM;CCK-8法检测不同浓度Taxifolin对CCRF-CEM细胞活力影响,筛选本实验用Taxifolin浓度;将CCRF-CEM细胞分为control组、Taxifolin-L组、Taxifolin-M组、Taxifolin-H组、Taxifolin+rCCL2组;EDU法检测各组CCRF-CEM细胞增殖;流式细胞术检测各组CCRF-CEM细胞凋亡;Transwell检测各组CCRF-CEM细胞侵袭能力;平板克隆形成实验检测各组CCRF-CEM细胞集落形成能力;RT-PCR检测各组CCRF-CEM细胞CCL2、CCR2基因表达水平;Western blot检测各组CCRF-CEM细胞CCL2、CCR2、Bcl-2、Bax、Caspase-3蛋白表达水平。结果:选择25、50、100μmol/L三个Taxifolin浓度进行后续实验;与control组相比,Taxifolin-L、M、H组CCRF-CEM细胞凋亡率、Bax、Caspase-3蛋白表达水平显著升高,CCRF-CEM细胞EDU阳性细胞率、侵袭细胞数量、细胞克隆集落数、CCL2、CCR2基因表达水平、CCL2、CCR2、Bcl-2蛋白表达水平均显著性降低,且呈剂量依赖性(P<0.05);与Taxifolin-H组相比,Taxifolin+rCCL2组CCRF-CEM细胞凋亡率、Bax、Caspase-3蛋白表达水平显著性降低,CCRF-CEM细胞EDU阳性细胞率、侵袭细胞数量、细胞克隆集落数、CCL2、CCR2基因表达水平、CCL2、CCR2、Bcl-2蛋白表达水平均显著性升高(P<0.05)。结论:Taxifolin可能通过抑制CCL2/CCR2轴,从而抑制CCRF-CEM细胞恶性进展。

关键词：花旗松素 CCL2/CCR2轴急性淋巴细胞白血病细胞恶性进展

Hydrodynamic process of Tibetan Plateau lake revealed by grain size:Case study of Pumayum Co

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Chinese Science Bulletin 2012年第19期57卷 2433-2441页

作者： JU JianTing ZHU LiPing feng jinliang WANG JunBo WANG Yong XIE ManPing PENG Ping ZHEN XiaoLin LÜXinMiao Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Tourism and Geography Sciences Yunan Normal UniversityKunming 650500China

Under the background of global warming,some lakes on the Tibetan Plateau(TP) are potentially sensitive to temperature *** a case study of Pumayum Co,where glacier meltwater is important to supply(we call this a glacier-fed lake hereafter),we analyze the sensitivity of lake sediment grain size to temperature *** is done by resolving the modern hydrodynamic process,coupled with comparison of paleoclimatic *** to the spatial distributions of parameters,percentage of grain size and the grain size frequency distribution curve,hydrodynamic processes are *** clastic sedimentation types are thereby *** the open lake area,suspended load transport is the main transport *** Size Trend Analysis(GSTA),a sediment dynamics model,reveals a trend toward eastward *** indicates that the largest and glacier-fed river,the Jiaqu River,influences the entire lake(not just the subsurface alluvial fan),and that lake sediment grain size may serve as a temperature *** series comparison between grain size of a short core from the central lake and meteorological data confirms this temperature indication,which in turn shows reliability of the method discriminating the hydrodynamic *** case study will improve the ability of paleoclimatic reconstruction using lake sediment in glacier-fed lakes on the Tibetan Plateau.

关键词：高原湖泊青藏高原晶粒尺寸水动力过程案例显示沉积物粒度动力学过程

The reconstruction of fossil planation surface in Chin

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Chinese Science Bulletin 2002年第5期47卷 434-440页

作者： feng jinliang & GUI ZhijiuDepartment of Urban and Environmental Sciences, Peking University, Beijing 100871, China Institute of Geography, Hebei Academy of Sciences, Shijiazhuang 050011, China Department of Urban and Environmental Sciences Peking University Beijing China Institute of Geography Hebei Academy of Sciences Shijiazhuang China

On the basis of results of relative subjects, the fossil planation surface has been discussed by the authors from the point of geomorphologic view. The discussion contents included the characteristic information, research methods, paleotopography (gradient and altitude) and other problems about fossil planation surface. The recognition and reconstruction of fossil planation surface mainly rely on the following characteristic information: (i) the character of erosion unconformity surface; (ii) the paleo-weathering crust and residual deposits; (iii) the paleo-karst and filled deposit in the paleo-karst under the unconformity surface, and (iv) the character and environment of sediment above the unconformity surface. According to the above-mentioned characteristic information, the authors recognized and reconstructed two stages of fossil planation surface on Pa-leo-land of North China and Yangtze Paleo-land. These two fossil planation surfaces formed from Middle Ordovician to Lower Carboniferous and from

关键词： fossil planation surface characteristic information pa-leotopography reconstruction.

Environmental evolution of Gongwang Mountains during Holocene in northeastern Yunnan,China

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Global Geology 2008年第3期11卷 156-167页

作者： Wei ZHANG Chuanchuan LI Zhijiu CUI jinliang feng College of Urban and Environmental Sciences Liaoning Normal University Dalian 116029 Liaoning China College of Environmental Sciences Peking University Beijing 100871 China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China

This paper presents the study on two continuous glacio-lacustrine sedimentary deposits, Laotanfang （3 597 m） and Shibantang （3 689 m） located on the southern and northern sides of Hulifang peak in Yunan, China. Environmental change indexes are constructed for each deposit, based on grain size, geochemical and pollen analysis, environmental magnetic susceptibility, and 14C dating. The study of climatic environmental change since the Holocene epoch in this region shows that the climate fluctuated at different stages during the early Holocene, that is, the climate was cool and wet during 8.4-7. 7r ka, cold and wet during 7.7-6. 5 ka, cold and dry during 6. 5-4.7 ka, cool and wet during 4.7-2. 1 ka, warm and wet during 2. 1-1.0 ka, and warmer and wet since 1 ka. These findings reflect the overlapping influences of the southwest and southeast monsoons in different times during the Holocene in the north part of southwestern China are in accord with other Holocene climate change models in this part of China.

关键词： Gongwang Mountain Holocene climatic change environmental evolution

Circulating cell-free mtDNA as a new biomarker for cancer detection and management

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Cancer Biology & Medicine 2024年第2期21卷 105-110页

作者： Fan Peng Siyuan Wang Zehui feng Kaixiang Zhou Huanqin Zhang Xu Guo jinliang Xing Yang Liu State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers and Xijing Hospital of Digestive Diseases Fourth Military Medical UniversityXi’an 710032China Department of Clinical Diagnosis Tangdu HospitalFourth Military Medical UniversityXi’an 710038China

Cancer is a major cause of death worldwide,and was responsible for 19.29 million new cases and 9.96 million deaths in 2020 *** total number of patients with cancer worldwide is estimated to reach 28 million by *** Ame... 详细信息

关键词： Cancer cancer death

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高原湖泊中萝卜螺属壳体研究现状及展望

地理科学进展 2018年第10期37卷 1430-1441页

作者：陈锋冯金良山两财经大学环境经济学院太原030006 山西财经大学地表过程与生态环境研究所太原030006 中国科学院青藏高原研究所北京100101

湖泊的古水文及古水化学重建是湖泊研究领域最具挑战性的工作之一。在湖泊、河湖相及高湖面沉积物中,萝卜螺属壳体化石广泛分布;而且现生萝卜螺属亦广泛地分布于全球的湖泊及河流。这些生物碳酸盐(文石)壳体成为一种潜在的和高分辨率的... 详细信息

湖泊的古水文及古水化学重建是湖泊研究领域最具挑战性的工作之一。在湖泊、河湖相及高湖面沉积物中,萝卜螺属壳体化石广泛分布;而且现生萝卜螺属亦广泛地分布于全球的湖泊及河流。这些生物碳酸盐(文石)壳体成为一种潜在的和高分辨率的环境信息记录载体。近年来,萝卜螺属的生境及其壳体的稳定碳氧同位素和元素已经逐步被用于了解青藏高原及其他地区的古水文、古水化学和古气候的信息。然而,在萝卜螺属壳体如何记录其宿生水体的古水文、古水化学等信息,以及如何基于萝卜螺属壳体化石重建古环境等方面,仍有许多科学问题有待探索。本文在前人研究的基础上,侧重在作为环境信息载体的萝卜螺属的分类体系、生境研究及其应用和壳体指标(δ^(13)Cshell,δ^(18)Oshell,^(87)Sr/^(86)Sr,Sr/Ca和Mg/Ca)特征及其在环境重建中的应用等方面进行总结和展望。

关键词：高原湖泊萝卜螺属稳定碳氧同位素锶同位素壳体元素比值古环境重建