检索结果-南通市图书馆

Early Triassic Legoupil Formation in Schmidt Peninsula,Antarctic Peninsula:Provenance and Depositional Settings

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第2期35卷 317-331页

作者： Chao Zhang Ying-Chun Cui Chen-Guang Liu Fang-Hua Cui Lu-yuan Wang Wei-Qiang Zhang School of Resources and Environmental Engineering Shandong University of TechnologyZibo255049China MNR Key Laboratory for Polar Science Polar Research Institute of ChinaShanghai201209China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyState Oceanic AdministrationQingdao266061China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao266061China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Land and ResourcesChangchun130061China

Geochemical compositions can be used to determine the tectonic setting of sedimentary basins,while where the link of source to sink is no longer preserved,detrital zircon age patterns can aid in resolving the original basin setting.The metasedimentary Legoupil Formation,located at Cape Legoupil and the Schmidt Peninsula,could give a hint for the tectonic evolution of Antarctic Peninsula.In this contribution,we constrain the sedimentary provenance of the Legoupil Formation through geochemistry and detrital zircon U-Pb geochronology.The petrography and geochemical features indicate that the provenance of the Legoupil Formation could be felsic rocks.Detrital zircon grains record a steady supply of Permian and Ordovician material into the Legoupil Formation.The youngest concordant zircon ages of 262 Ma suggest that the depositional time of Legoupil Formation is no older than Late Permian.The detrital zircon age spectrum of Legoupil Formation suggests that the Legoupil Formation sediments should be derived from regional sources endemic to western Gondwana prior to its breakup.Together with the previous studies,geochemistry and detrital zircons reflect an active continental margin tectonic setting and the detrital zircon spectra of Legoupil Formation are similar to the ones deposited in forearc tectonic setting.

关键词： Schmidt Peninsula Legoupil Formation Trinity Peninsula Group detrital zircons Antarctic Peninsula geochemistry

Bimetallic selenide heterostructure with directional built-in electricfield confined in N-doped carbon nanofibers for superior sodium storage with ultralong lifespan

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第4期91卷 407-416页

作者： Junying Weng Degui Zou Wenyong yuan Pengfei Zhou Minghui Ding Jin Zhou Hailin Cong Fangyi Cheng School of Materials Science and Engineering Shandong University of TechnologyZibo 255000ShandongChina School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Constructing heterostructure is considered as an effective strategy to address the sluggish electronic and ionic kinetics of anode materials for sodium ion batteries(SIBs).However,realizing the orientated growth and uniform distribution of the heterostructure is still a great challenge.Herein,the regulated novel CoSe_(2)/NiSe_(2)heterostructure confined in N-doped carbon nanofibers(CoSe_(2)/NiSe_(2)@N-C)are prepared by using Co/Ni-ZIF template,in which,the CoSe_(2)/NiSe_(2)heterostructures realize uniform distribution on a micro level.Benefiting from the unique heterostructure and N-doped carbon nanofibers,the CoSe_(2)/NiSe_(2)@N-C deliveries superior rate capability and durable cycle lifespan with a reversible capacity of 400.5 mA h g^(-1)after 5000 cycles at 2 A g^(-1).The Na-ion full battery with CoSe_(2)/NiSe_(2)@N-C anode and layered oxide cathode displays a remarkable energy density of 563 W h kg^(-1)with 241.1 W kg^(-1)at 0.1 A g^(-1).The theoretical calculations disclose that the periodic and directional built-in electric-field along with the heterointerfaces of CoSe_(2)/NiSe_(2)@N-C can accelerate electrochemical reaction kinetics.The in(ex)situ experimental measurements reveal the reversible conversion reaction and stable structure of CoSe_(2)/NiSe_(2)@N-C during Na+insertion/extraction.The study highlights the potential ability of precisely controlled heterostructure to stimulate the electrochemical performances of advanced anode for SIBs.

关键词： CoSe_(2)/NiSe_(2) heterostructure Built-in electric-field Rate capability Ultralong lifespan Sodium ion batteries

Catalytic asymmetric dearomative azo-Diels–Alder reaction of 2-vinlyindoles

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第4期35卷 357-362页

作者： Yu-Hang Miao Zheng-Xu Zhang Xu-Yi Huang yuan-Zhao Hua Shi-Kun Jia Xiao Xiao Min-Can Wang Li-Ping Xu Guang-Jian Mei Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450052China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000China Institute of Pharmaceutical Science and Technology Zhejiang University of TechnologyHangzhou 310014China

Due to the high electrophilic nature of azo-dienophiles, azo-Diels–Alder proceeds rapidly even without the need of a catalyst and is therefore regarded as the “click reaction”. This spontaneity causes strong background reaction and poses a daunting challenge to chemists for developing the catalytic asymmetric version. Reported herein is the first catalytic asymmetric dearomative azo-Diels–Alder reaction between2-vinylindoles and triazoledione. This protocol makes use of the high energy barrier of dearomatization to avert the strong background reaction of azo-Diels–Alder reaction, allowing the implementation of the projected reaction at ambient temperature. Density functional theory calculations have been performed to gain insights into the reaction mechanism and the origins of the enantioselectivity. By using this method,a variety of tetracyclic indole derivatives have been readily prepared in good to excellent yields and with excellent diastereo-and enantio–selectivities(33 examples, up to 97% yield and >99% ee, >20:1 dr).

关键词： Catalytic asymmetric dearomatization Azo-Diels–Alder reaction 2-Vinylindoles Chiral phosphoric acid Tetracyclic indole derivatives

Detection of Water Meter Digits Based on Improved Faster R-CNN

在线全文

学校读者我要写书评

暂无评论

Journal of Computer and Communications 2024年第3期12卷 1-13页

作者： Liyun Sun Yuying yuan Shichao Qiao Ruijie Qi School of Computer Science and Technology Shandong University of Technology Zibo China

In order to more accurately detect the accuracy of word-wheel water meter digits, 2000 water meter pictures were produced, and an improved Faster-RCNN algorithm for detecting water meter digits was proposed. The improved Faster-RCNN algorithm uses ResNet50 combined with FPN (Feature Pyramid Network) structure instead of the original ResNet50 as the feature extraction network, which can enhance the accuracy of the model for small-sized digit recognition;the use of ROI Align instead of ROI Pooling can eliminate the error caused by the quantization process of the ROI Pooling twice, so that the candidate region is more accurately mapped to the feature map, and the accuracy of the model is further enhanced. The experiment proves that the improved Faster-RCNN algorithm can reach 91.8% recognition accuracy on the test set of homemade dataset, which meets the accuracy requirements of automatic meter reading technology for water meter digital recognition, which is of great significance for solving the problem of automatic meter reading of mechanical water meters and promoting the intelligent development of water meters.

关键词： Faster RCNN Identification of Water Meter Numbers ResNet50 FPN ROI Align

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

农作物灌溉系统的智能物联监控平台应用

农机化研究 2024年第2期46卷 207-211页

作者：李媛山东工业职业学院山东淄博256414

为进一步实现农作物灌溉系统的精准作业目标,提高自动灌溉作业的综合水平,以物联网技术为支撑,针对灌溉系统的监控效能展开应用探究。以系统的组成及作业原理为基点,融入智能物联感知技术,建立物联监控模型,匹配适应性的监控平台架构,... 详细信息

为进一步实现农作物灌溉系统的精准作业目标,提高自动灌溉作业的综合水平,以物联网技术为支撑,针对灌溉系统的监控效能展开应用探究。以系统的组成及作业原理为基点,融入智能物联感知技术,建立物联监控模型,匹配适应性的监控平台架构,并展开基于智能物联监控平台应用的灌溉作业试验。结果表明:设计的监控系统数据丢包率小于3.00%,系统决策准确率与网络覆盖率分别相对提升了8.72%和8.60%,且整体灌溉区域的土壤湿度合格率与灌溉均匀度也得到了同步改善,具有良好的实施性与优越性,对于农机灌溉设备的智慧转型具有重要的推广价值。

关键词：灌溉系统监控效能物联感知决策准确率智慧转型

医学相关专业大学生对“时间银行”养老模式的参与意愿及影响因素研究

在线全文

学校读者我要写书评

暂无评论

中国社会医学杂志 2024年第3期41卷 320-324页

作者：陈圆梁高科李嘉玲张子博王卫红湖南师范大学医学院护理系湖南长沙410013 湖南师范大学道德文化研究中心湖南长沙410013

目的探究医学相关专业大学生对“时间银行”养老模式的参与意愿现状及影响因素。方法采用便利抽样法,抽取湖南省4所高校中共550名医学相关专业大学生,于2022年1-3月,使用自制调查表进行调查,采用无序多分类Logistic回归分析法,分析参... 详细信息

目的探究医学相关专业大学生对“时间银行”养老模式的参与意愿现状及影响因素。方法采用便利抽样法,抽取湖南省4所高校中共550名医学相关专业大学生,于2022年1-3月,使用自制调查表进行调查,采用无序多分类Logistic回归分析法,分析参与意愿的影响因素。结果 550名医学相关专业大学生中,267人(48.5%)愿意参与“时间银行”,216人(39.3%)表示不确定,67人(12.2%)不愿意参加。愿意与不确定参与“时间银行”志愿服务的大学生对健康保健服务、教育康乐服务、心理服务的参与意愿比较高。Logistic回归分析结果显示,知晓总分(OR=1.036,95%CI:0.996~1.078)、有志愿经历(OR=2.233,95%CI:1.210~4.122)是参与意愿的有利因素,男性(OR=0.494,95%CI:0.248~0.982)、对未来自身养老不担忧(OR=0.476,95%CI:0.227~1.000)、60岁后愿意入住养老机构(OR=0.136,95%CI:0.052~0.357)、接受社区养老(OR=0.327,95%CI:0.138~0.775)是参与意愿的危险因素。结论湖南省医学相关专业大学生对“时间银行”养老模式的参与意愿较低。未来需要扩大宣传,从各方面积极采取措施提升时间货币的信用保障,提高“时间银行”养老模式吸引力,进一步壮大医学相关专业志愿者队伍。

关键词：时间银行医学生意愿分析影响因素

维普期刊数据库博看期刊

单目立体视觉中的系统误差与棱镜位姿对视场的影响评估

在线全文

学校读者我要写书评

暂无评论

光学学报 2024年第8期44卷 94-105页

作者：原天宇代祥俊杨福俊东南大学土木工程学院江苏省工程力学重点实验室江苏南京211189 山东理工大学交通与车辆工程学院山东淄博255090

对棱镜分光式单目立体视觉系统进行了深度方程的推导,修正了棱镜位姿偏移引入的成像误差,分析了位姿引起的成像视场变化。该系统由一个相机与两个具有相同参数的双棱镜组成,相机单次拍摄可获取两幅具有视差的子图像,这可视为两个具有一... 详细信息

对棱镜分光式单目立体视觉系统进行了深度方程的推导,修正了棱镜位姿偏移引入的成像误差,分析了位姿引起的成像视场变化。该系统由一个相机与两个具有相同参数的双棱镜组成,相机单次拍摄可获取两幅具有视差的子图像,这可视为两个具有一定夹角的虚拟相机同时成像。采用虚拟点模型与光线追踪法推导深度方程,建立视差与深度方程参数之间的关系,进一步研究了系统中物距与夹角对图像深度信息与视差的影响。棱镜组的人为放置,不可避免地引入位姿误差,进而影响每个成像通道中的成像视场。基于棱镜的旋转与偏移,建立了修正的虚拟点模型,并深入研究了棱镜组位姿对系统成像与视场产生的影响;最后通过实验验证了理论与推导的有效性与准确性。

关键词：测量单目立体视觉棱镜位姿深度方程系统误差视场评估

不同病理亚型EGFR敏感突变肺腺癌靶向治疗的疗效与预后分析

在线全文

学校读者我要写书评

暂无评论

中华肿瘤防治杂志 2024年第9期31卷 549-555页

作者：高强袁双虎山东大学医学融合与实践中心山东济南250112 淄博市第一医院肿瘤科山东淄博255200 山东省肿瘤防治研究院(山东省肿瘤医院)放疗科山东第一医科大学(山东省医学科学院)山东济南250117 中国科学技术大学附属第一医院(安徽省立医院)放疗科中国科学技术大学生命科学与医学部安徽合肥230031

目的评估不同病理亚型表皮生长因子受体(EGFR)敏感突变肺腺癌患者靶向治疗疗效与预后,为临床提供参考.方法回顾性收集2012-07-01-2017-10-31在山东省肿瘤医院(192例)和淄博市第一医院(18例)接受靶向治疗(TKI)的210例肺癌患者资料.其中,... 详细信息

目的评估不同病理亚型表皮生长因子受体(EGFR)敏感突变肺腺癌患者靶向治疗疗效与预后,为临床提供参考.方法回顾性收集2012-07-01-2017-10-31在山东省肿瘤医院(192例)和淄博市第一医院(18例)接受靶向治疗(TKI)的210例肺癌患者资料.其中,男91例,女119例;年龄<60岁86例,≥60岁124例.所有患者基因检测结果均为19-Del或L858R敏感突变,病理类型为肺腺癌.根据病理亚型的不同,将患者分为附壁型(19例)、腺泡型(150例)、乳头型(16例)、实体型(13例)和微乳头型(12例)5组.主要研究终点为无进展生存时间(PFS),次要研究终点为总体生存时间(OS).单因素生存分析采用Kaplan-Meier法和Log-rank检验,评估患者的PFS和OS,并制作生存曲线;多因素分析采用Cox比例风险回归分析来探讨预后影响因素.结果210例患者中53例患者生存,157例患者死亡.中位PFS:附壁型组36.6个月,腺泡型组20.0个月,乳头型组16.0个月,实体型组5.0个月,微乳头型组12.3个月,差异有统计学意义,P<0.001.中位OS:附壁型组60.0个月,腺泡型组39.5个月,乳头型组58.0个月,实体型组12.0个月,微乳头型组41.0个月,差异无统计学意义,P=0.06.影响PFS多因素回归分析:与附壁型组相比,腺泡型组、实体型组和微乳头型组进展风险差异均有统计学意义(腺泡型组:HR=1.72,95%CI为1.04~2.84,P=0.035;实体型组:HR=16.49,95%CI为7.50~36.24,P<0.001;微乳头型组:HR=2.27,95%CI为1.04~4.95,P=0.039).影响OS的多因素回归分析:与附壁型组相比,实体型组死亡风险是其的3.38倍,HR=3.38,95%CI为1.41~8.12,P=0.006.结论EGRF敏感突变患者TKI治疗后,腺泡型、实体型和微乳头型是无进展生存期预后不良的病理亚型,实体型是总生存期预后不良的病理亚型,可用于预测靶向治疗的疗效.

关键词：肺癌敏感突变靶向治疗病理亚型

同题写作的现代意蕴--论王秀梅的《聊斋志异》同题小说创作

在线全文

学校读者我要写书评

暂无评论

蒲松龄研究 2024年第1期 108-118页

作者：高媛山东理工大学文学与新闻传播学院山东淄博255000

王秀梅以“同题写作”的方式,借用《聊斋志异》中部分篇目的题名,结合其所传达的主题思想、叙述的情节框架、建构的人物关系、使用的文学意象等,写作了全新时空背景中的人物故事,对现代社会的生活内容进行展示。在这些同题小说中,亲子... 详细信息

王秀梅以“同题写作”的方式,借用《聊斋志异》中部分篇目的题名,结合其所传达的主题思想、叙述的情节框架、建构的人物关系、使用的文学意象等,写作了全新时空背景中的人物故事,对现代社会的生活内容进行展示。在这些同题小说中,亲子关系、底层生活以及养老问题等现实问题都得到重点体现,关涉现代历史的战争叙事以及与此相关的父系家族历史叙说也通过作品中人物的探求行为得以凸显。除此之外,写作者还在借鉴原文意象的基础上,创造出兼及客观现实环境以及人物内心世界的“飞升的人”“坠落的人”以及“桥”等重要意象。

关键词：《聊斋志异》同题写作现代内容