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Identification of cadmium-induced genes in maize seedlings by suppression subtractive hybridization

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Frontiers of Environmental Science & Engineering 2010年第4期4卷 449-458页

作者： Quanlin DAI Baifei HUANG Zhongyi yang Jiangang YUAN junzhi yang State Key Laboratory of Biocontrol Key Laboratory of Gene Engineering of the Ministry of EducationSchool of Life SciencesSun Yat-sen UniversityGuangzhou 510275China College of Natural Resources University of CaliforniaBerkeleyCA 94720USA Department of Safety and Environmental Engineering Hunan Institute of TechnologyHengyang 421002China

A maize variety,Huatian-1,had an unusuallylow translocation rate of cadmium(Cd)(59.6 mg·kg^(-1)inthe roots and 0.093 mg·kg^(-1)in the grain)compared to24 other varieties while being grown in soils with16.50 mg·kg^(-1)*** indicates that this particularspecies may have special mechanisms that affect theabsorption and translocation pattern of *** this paper,the technique of suppression subtractive hybridization(SSH)was used to isolate and identify Cd-induced genesfrom Huatian-1 hydroponically exposed to 0.1mMCdCl_(2) for 1 h,12 h,24 h,and 48 *** found a total of15 differentially expressed genes in the four groups;2,3,4,and 6 genes were from the groups of 1 h,12 h,24 h,and48 h treatment,*** PLDb1mRNA,adenosine triphosphate(ATP)phosphoribosyltransferase 2,and Sp17 were turned on in the maize inresponse to Cd stress,and it might provide new clues toexplain the mechanism of maize tolerance to Cd.

关键词： Zea mays L. cadmium(Cd) suppression subtractive hybridization

Late Jurassic Volcanism Deduced from Geochemical,Geochronological,and Sr-Nd-Hf Isotopic Composition Characteristics of the Nanyuan Formation,South China

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Acta Geologica Sinica(English Edition) 2023年第2期97卷 449-468页

作者： WANG Dongsheng LI Jinwen SHE Hongquan WANG Kunming yang junzhi REN Chenghao MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological Sciences(CAGS)Beijing 100037China Forestry and Grassland Administration of Shanxi Province Taiyuan 030021China

The Nanyuan Formation contains information related to the Mesozoic tectonic *** this study,three representative profiles were surveyed from the Nanyuan Formation,and multiple analyses were *** U-Pb dating yielded their ages as approximately 158–146 *** volcanic rocks are enriched in Rb,Th,U,K,and Pb and depleted in Nb,Ta,P,and Ti,implying their affinity for I-type ***εNd(t)values(-8.3 to-6.0),^(87)Sr/^(86)Sr)i values(0.7077–0.7094)of the volcanic rock,andεHf(t)values(-8.71 to 0.12)of the Mesozoic zircons suggest that the Nanyuan Formation magma originated in the lower crust with the involvement of depleted mantle *** parent rocks of the rhyolitic and dacitic volcanic rocks formed by partial melting of basement rocks in South China and the andesitic volcanic rocks were derived from partial melting of the metasomatites generated by slab-mantle *** fractional crystallization also played an important role in later *** diagrams of the volcanic rocks indicated that they formed in a volcanic arc *** with previous data,the Nanyuan Formation recorded subduction of the Paleo-Pacific Plate before regional tectonic *** compressive stress field endured until the end of the Late Jurassic.

关键词： Late Jurassic Nanyuan Formation volcanic rocks volcanic arc geochemistry petrogenesis Pinghe

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智能建筑综合布线路由优化研究

低压电器 2007年第14期 40-43页

作者：杨军志江苏省邮电规划设计院有限责任公司江苏南京210009

以AutoCAD 2004为图形平台,利用改进的迪杰斯特拉(Dijkstra)最短路算法、AutoCAD VBA开发技术以及数据库技术,对综合布线各子系统路由优化设计方法进行了分析和研究。主要分析了如何对配线子系统进行优化设计。

关键词：智能建筑综合布线系统 Dijkstra最短路算法 AutoCAD VBA 数据库技术路由优化

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基于多尺度圆周频率滤波与卷积神经网络的遥感图像飞机目标检测方法研究

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电子与信息学报 2021年第5期43卷 1397-1404页

作者：杨钧智吴金亮智军北京市遥感信息研究所北京100011 中国电子科技集团公司第五十四研究所石家庄050081

针对遥感图像飞机目标检测因目标尺度不一存在漏警、虚警等问题,该文基于遥感图像中飞机目标形状特征和灰度变化特点提出了一种多尺度圆周频率滤波(MSCFF)与卷积神经网络(CNN)相结合的MSCFF+CNN飞机目标自动检测算法。该算法首先采用多... 详细信息

针对遥感图像飞机目标检测因目标尺度不一存在漏警、虚警等问题,该文基于遥感图像中飞机目标形状特征和灰度变化特点提出了一种多尺度圆周频率滤波(MSCFF)与卷积神经网络(CNN)相结合的MSCFF+CNN飞机目标自动检测算法。该算法首先采用多尺度圆周频率滤波器滤除遥感图像复杂背景,实现不同尺度飞机目标候选区域提取;然后,通过构建卷积神经网络(CNN)模型实现候选区域有效分类,最终精确确定飞机目标位置。最后,基于获取的真实遥感图像进行目标检测算法实验验证,经统计该算法的飞机目标检测率为94.38%,虚警率为3.76%,实验结果充分验证了该文算法的有效性,该算法可为机场监管、军事侦察等应用提供重要的技术支持。

关键词：遥感图像处理飞机目标检测多尺度圆周频率滤波器卷积神经网络

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