检索结果-南通市图书馆

Agricultural Sciences 2014年第10期5卷 858-863页

作者： Lina Wang xiaoyu yang Zhonghai Ren Xiufeng Wang College of Horticulture Science and Engineering Shandong Agricultural University Tai’an China School of Life Sciences Faculty of Science The Chinese University of Hong Kong Hong Kong China State Key Laboratory of Crop Biology Tai’an China

The combination effects of light and air temperature, which were expressed as photothermal ratio (PTR), on the growth and sex expression of three monoecious cucumbers (Cucumis sativus L. cv. “Xintaimici”, “Jinyan 3” and “Jinyan 4”) were studied with hydroponics in this research. The results showed that with the increase of PTR, different growth responses were observed in the three cucumber cultivars. In contrast, high PTR (H-PTR, 0.86 mol·m-2·degree-day-1) significantly increased the total number of female nodes and decreased the total number of male nodes of the three monoecious cucumber cultivars compared with cucumbers grown under low PTR (L-PTR, 0.64 mol·m-2·degree-day-1). More photoassimilate was partitioned to fruits of three cucumber cultivars with the increase of PTR, indicating that PTR-mediated femaleness of monoecious cucumber might be attributed to the enhancement of photoassimilate translocation from source organs to sink organs.

关键词： Cucumber Growth Photothermal Ratio Sex Expression

对映选择性亲电胺化合成吲哚C—N阻旋异构体

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有机化学 2022年第8期42卷 2596-2598页

作者：刘炜杨晓瑜上海科技大学物质科学与技术学院上海201210

吲哚作为一类重要的杂环,广泛存在于药物分子和天然产物中,手性吲哚衍生物的不对称合成也一直是有机合成以及药物化学中的一个重要研究方向.通过吲哚与各种亲电试剂之间的对映选择性Friedel-Crafts反应可以在吲哚的亲核位点(通常在C-3位... 详细信息

吲哚作为一类重要的杂环,广泛存在于药物分子和天然产物中,手性吲哚衍生物的不对称合成也一直是有机合成以及药物化学中的一个重要研究方向.通过吲哚与各种亲电试剂之间的对映选择性Friedel-Crafts反应可以在吲哚的亲核位点(通常在C-3位)上实现直接的不对称官能团化.

关键词：不对称合成亲电试剂吲哚衍生物对映选择性药物化学阻旋异构药物分子天然产物

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权力之“徽”:正仓院“含绶鸟”纹考

南京艺术学院学报（美术与设计） 2019年第3期 52-59,I0001-I0002页

作者：杨小语重庆大学

日本正仓院所见诸多“含绶鸟”纹,是以唐、萨珊为代表的亚欧大陆文明对当时日本社会产生深刻影响的一处缩影,亦是在亚欧丝绸之路上广泛分布的“含绶鸟”图像的皇权征途的最东端。“含绶鸟”纹以“绶带”为核心元素,展示了古代亚欧地区... 详细信息

日本正仓院所见诸多“含绶鸟”纹,是以唐、萨珊为代表的亚欧大陆文明对当时日本社会产生深刻影响的一处缩影,亦是在亚欧丝绸之路上广泛分布的“含绶鸟”图像的皇权征途的最东端。“含绶鸟”纹以“绶带”为核心元素,展示了古代亚欧地区共通的权力崇拜心理和普遍的权位等级意识。而纹饰形成背后所蕴含的思维模式则与自古以来世界各地均存在的神话思维息息相关,显示出具象性、情感性等特征。

关键词：含绶鸟正仓院权力等级神话思维

Sequential activation of uterine epithelial IGF1R by stromal IGF1 and embryonic IGF2 directs normal uterine preparation for embryo implantation

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Journal of Molecular Cell Biology 2021年第9期13卷 646-661页

作者： Chan Zhou Meiying Lv Peike Wang Chuanhui Guo Zhangli Ni Haili Bao Yedong Tang Han Cai Jinhua Lu Wenbo Deng xiaoyu yang Guoliang Xia Haibin Wang Chao Wang Shuangbo Kong State Key Laboratory of Agrobiotechnology College of Biological SciencesChina Agricultural UniversityBeijingChina'2 Fujian Provincial Key Laboratory of Reproductive Health ResearchSchool of MedicineXiamen UniversityXiamenChina'3 Fuzhou Hospital of Traditional Chinese Medicine Affiliated to Fujian University of Traditional Chinese MedicineFuzhouChina'4 Department of Obstetrics and GynecologyThe First Affiliated Hospital of Xiamen UniversityXiamenChina'5 Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western ChinaCollege of Life ScienceNingXia UniversityYinchuanChina

Embryo implantation in both humans and rodents is initiated by the attachment of a blastocyst to the uterine *** blastocyst attachment,the uterine epithelium needs to transform at both the structural and molecular levels first,and then initiate the interaction with *** perturbation during this process will result in implantation failure or long-term adverse pregnancy *** steroid hormones,which function through nuclear receptors,combine with the local molecules produced by the uteri or embryo to facilitate *** insulin-like growth factor(IGF)signaling has been reported to play a vital role during ***,its physiological function during implantation remains *** study revealed that mice with conditional deletion of Igflr gene in uteri suffered from subfertility,mainly due to the disturbed uterine receptivity and abnormal embryo ***,we uncovered that in response to the nidatory estrogen on D4 of pregnancy,the epithelial IGF1R,stimulated by the stromal cell-produced IGF1,facilitated epithelial STAT3 activation to modulate the epithelial ***,embryonic derived IGF2 could activate both the epithelial ERK1/2 and STAT3 signaling through IGF1R,which was critical for the transcription of Cox2 and normal attachment *** brief,our data revealed that epithelial IGF1R was sequentially activated by the uterine stromal IGF1 and embryonic IGF2 to guarantee normal epithelium differentiation during the implantation process.

关键词： IGF1R IGF1 IGF2 uterine epithelium implantation blastocyst

中国华南地区地壳厚度与波速比分布特征及其地质意义

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地球物理学报 2021年第1期64卷 146-156页

作者：杨晓瑜李永华中国地震局地球物理研究所北京100081 中国地震局震源物理重点实验室北京100081

本研究利用中国国家地震台网336个固定地震台站记录的远震波形资料,通过P波接收函数H-κ分析估算了中国华南地区的地壳厚度和地壳平均波速比.研究结果显示,地壳厚度约为25~46 km,整体表现西深东浅的变化特点.研究区地壳厚度变化分别与... 详细信息

本研究利用中国国家地震台网336个固定地震台站记录的远震波形资料,通过P波接收函数H-κ分析估算了中国华南地区的地壳厚度和地壳平均波速比.研究结果显示,地壳厚度约为25~46 km,整体表现西深东浅的变化特点.研究区地壳厚度变化分别与布格重力异常和地形呈现负相关和正相关.扬子块体东部显示较低地壳波速比(<1.7)可能与地表沉积岩的存在相关.四川盆地内部的平均地壳波速比(约1.71~1.8)与全球大陆地盾/克拉通地区相当.但其周围地区地壳平均波速比明显增高(1.81~1.95),推测可能是克拉通形成过程中岩浆的底侵引起下地壳组分以铁镁质麻粒岩为主.华夏块体西部表现为薄的地壳厚度和低的地壳平均波速比(1.65~1.75),暗示该区基性下地壳物质的缺失可能与增厚的地壳发生拆沉有关.华夏块体东南段呈现出较高的地壳平均波速比(约1.77~1.86),地壳组成以中基性铁镁质为主,推断可能与晚中生代铁镁质岩浆底侵作用密切相关.

关键词：接收函数 H-κ叠加地壳厚度波速比华南地区

The measurement system of acrylic transmittance for the JUNO central detector

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Radiation Detection Technology and Methods 2020年第3期4卷 284-292页

作者： xiaoyu yang Nan Li Yuekun Heng Mengzhao Li Zhiyan Cai Xiaoyan Ma Xiaohui Qian Kaixi Huang Zhi Wu Wei He Yatian Pei Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Particle Detection and Electronics Beijing 100049China University of Chinese Academy of Science Beijing 100049China

Background The Jiangmen Underground Neutrino Observatory(JUNO)has 20 kilo-ton liquid scintillator as target mass contained by a huge acrylic sphere to carry out the research on neutrino *** transmittance is considered as an important optical performance of the JUNO Central Detector as it has a direct relationship to the number of photons detected by the JUNO Central Detector and further affects the energy resolution of *** The transmittance requirement of acrylic spherical panel for the JUNO Central Detector is exceeding 96%at the wavelength of 420 nm in ultrapure water and a specific measurement system was built and studied in Institute of High Energy Physics for this purpose,as the existing equipment cannot perform the sample test in the liquid and support the long sample length of 120 *** After improving the technology of thermoforming,the transmittances of the acrylic spherical panels meet the requirement of JUNO,which guarantees the batch production of acrylic panels on *** design of the measurement system,the constitution of hardware,the development of control and data acquisition software are introduced,and the measurement uncertainty of the system and the transmittance results of the acrylic samples from the spherical panel are discussed in this article.

关键词： Acrylic Optics Transmittance measurement Central detector JUNO

Ethyl Methanesulfonate (EMS)-Mediated Mutagenesis of Cucumber (<i>Cucumis sativus</i>L.)

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Agricultural Sciences 2014年第8期5卷 716-721页

作者： Lina Wang Bing Zhang Jinrui Li xiaoyu yang Zhonghai Ren College of Horticulture Science and Engineering Shandong Agricultural University Tai’an China School of Life Sciences Faculty of Science The Chinese University of Hong Kong Hong Kong China

Ethyl methanesulfonate (EMS) is a stable and effective chemical mutagen. In this study, cucumber (Cucumis sativus L. cv. “Shannong No. 5”) seeds were treated by 1% EMS for 12 h, 24 h and 48 h to optimize EMS mutagenesis and determined median lethal dose of EMS (1% EMS and 24 h) for “Shannong No. 5”. After treated by 1% EMS for 24 h, 541 M1 plants were grown in greenhouse for phenotype investigation. The fertility of M1 cucumbers was very low, and only 79 lines produced seeds after self crossing. 60 independent M2 families comprising 600 M2 plants were investigated for phenotypic alteration, and 11 individual mutant lines were isolated into six groups: short-fruit mutants, long-fruit mutants, small-flower mutants, big-flower mutants, opposite-tendril mutants and clustered-leaf mutants. The mutation frequency was 18.3%. Two selected representatives, short-fruit mutants and clustered-leaf mutants, showed 1:3 of segregation ratio in M2 populations. This ratio is consistent with classic Mendelian model, indicating that the two kinds of mutants may be controlled by a single recessive gene, respectively. Long-fruit phenotype was stably inherited and no segregation was observed in M3 generation, indicating that this mutant line may be homozygous.

关键词： Cucumber Ethyl Methanesulfonate Mutagenesis

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《植物病理学报》的办刊理念

中国科技期刊研究 2005年第2期16卷 223-225页

作者：杨晓昱 <植物病理学报>编辑部

阐述了植物病理学报是刊登有关植物病理学研究和有关综述的专业学术期刊,经过几十年的办刊实践,总结出了办刊理念是质量和特色的高度统一。近几年特别是2003年学报改版以后,该刊的质量有明显的提高。分析其原因主要是学术水平、编审能... 详细信息

阐述了植物病理学报是刊登有关植物病理学研究和有关综述的专业学术期刊,经过几十年的办刊实践,总结出了办刊理念是质量和特色的高度统一。近几年特别是2003年学报改版以后,该刊的质量有明显的提高。分析其原因主要是学术水平、编审能力有了长足的进步,积极推行了编审的标准化等,学报不但内容丰富和研究水平有了很大的提高,而且在期刊的编辑形式上更加美观。最后简述了该刊的发展前景。

关键词：学报办刊理念编辑形式改版学术水平学术期刊专业原因美观综述

结合多尺度注意力和边缘监督的遥感图像建筑物分割模型

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激光与光电子学进展 2022年第22期59卷 327-336页

作者：杨潇宇汪西莉陕西师范大学计算机科学学院陕西西安710119

遥感图像分割是遥感图像处理领域的一项重要应用。针对卷积神经网络在遥感图像分割时存在建筑物错分、漏分,建筑物轮廓分割不准确的问题,基于深度学习网络U-Net,提出了一种结合多尺度注意力和边缘监督的遥感图像分割网络MAE-Net。首先,... 详细信息

遥感图像分割是遥感图像处理领域的一项重要应用。针对卷积神经网络在遥感图像分割时存在建筑物错分、漏分,建筑物轮廓分割不准确的问题,基于深度学习网络U-Net,提出了一种结合多尺度注意力和边缘监督的遥感图像分割网络MAE-Net。首先,在编码阶段每层引入多尺度注意力模块,该模块对输入特征图进行通道均等分组,每组使用大小不同的卷积核进行特征提取,之后对每组施加通道注意力机制,通过自学习的方式获得更为有效的特征,解决大小不一建筑物特征提取不准确的问题;其次,在解码阶段引入边缘提取模块,构造边缘监督网络,通过损失函数计算边缘标签和预测边缘的误差,帮助分割网络更好地学习建筑物边缘特征,使建筑物边界的分割结果更为连续、平滑。实验结果表明,MAE-Net能够从背景复杂多样、尺度变化较大的遥感图像中完整地分割出建筑物,且分割精度较高。

关键词：图像处理神经网络遥感图像多尺度特征提取注意力机制边缘监督

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提高聋高中英语词汇教学有效性的探究

中国特殊教育 2010年第2期 16-18页

作者：杨小玉华东师范大学教育科学学院上海200062 上海市聋哑青年技术学校上海200237

本文试从聋生识记英语单词的特点出发,探索提高聋高中英语词汇教学质量的有效方法。主要有:(1)发挥视觉特色,增加识记渠道(借助观察想象,借助直观教具,借助多媒体课件);(2)培养学习兴趣,提高识记热情(开展游戏教学,进行情景教学);(3)学... 详细信息

本文试从聋生识记英语单词的特点出发,探索提高聋高中英语词汇教学质量的有效方法。主要有:(1)发挥视觉特色,增加识记渠道(借助观察想象,借助直观教具,借助多媒体课件);(2)培养学习兴趣,提高识记热情(开展游戏教学,进行情景教学);(3)学习构词规律,降低识记难度;(4)利用美国手语,加深识记痕迹。

关键词：聋生英语词汇教学