检索结果-内蒙古大学图书馆

10th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP)

作者： Wu, Qiang zhao, Xiangnan Li, xuwen Beijing Univ Technol Coll Elect Informat & Control Engn Beijing Peoples R China Beijing Univ Technol Coll Life Sci & Bioengn Beijing Peoples R China

ISBN: (纸本)9781479953905

The algorithm presented here is used on unmanned aerial vehicles system. In 2013,*** proposed a matching cost computation model(or function), This matching cost model combined three kinds of constraints, the cost function is formulated by combining three individual costs: a cost computed on an extended census transformation of the images;the absolute difference cost, taking into account information from colour channels;and a cost based on the principal image derivatives. Experiments show that the cost function is excellent performance in similar estimates. Apply it to the stereo matching of ancient buildings, it is favorable for practical. However, this experiment, in color mutated region, leaded to blurred border. Therefore, our proposed method added color space structural information, which based on HVS Weber's law, to the cost function. we use the differential excitation of WLD reflects the structure of color space. This robust cost measures can reduce percent of bad pixels in mutated color region. The proposed method use color image, which is used after epipolar line rectification.

关键词： The stereo matching of color image Census Weber's law

来源：评论

学校读者我要写书评

暂无评论

Study on Mechanical Behavior of Masonry Wall in School Building Reinforced by CFRP

Study on Mechanical Behavior of Masonry Wall in School Build...

引用

International Conference on Materials Engineering and Mechanical Automation (MEMA 2013)

作者： Lin, Hong Yang, zhao Wang, xuwen Ke, Xiang Wuhan Univ Technol Design & Res Inst Wuhan 430070 Peoples R China Wuhan Univ Sci & Technol Inst Urban Construct Wuhan Peoples R China

ISBN: (纸本)9783037859018

CFRP is a new kind of building materials popularly used in structure strengthening. In order to study the reinforcement technique for masonry walls of school buildings, the walls with window opening strengthened by CFRP were studied in the paper. Based on the experiment result, the finite element simulation and theoretical calculation analysis were done to study the mechanical behavior and shear capacity of the wall with window opening reinforced by CFRP. The CFRP pasted at the corner of window opening were proved to be effectively in improving shear capacity of the walls, and simple calculation formulas of shear capacity were provided in the paper, which proved to be accurate.

关键词： CFRP Masonry structure Mechanical behavior Shear capacity

来源：评论

学校读者我要写书评

暂无评论

Impacts of simulated acid rain on soil organic matter and metal aluminum and iron ions leaching from red soil in central south China

Impacts of simulated acid rain on soil organic matter and me...

引用

International Conference on Manufacture Engineering and Environment Engineering (MEEE)

作者： Tian, Wenjie zhao, Fangni He, xuwen Li, Fasheng China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing Peoples R China Luoyang Inst Sci & Technol Dept Environm Engn Chem Luoyang Peoples R China Chinese Res Inst Environm Sci Beijing Peoples R China

ISBN: (纸本)9781845648251;9781845648244

Acid rain is a problem of increasing agricultural, environmental, and ecological concerns worldwide. This study investigated impacts of simulated acid rain (SAR) on soil organic matter (SOM) and metal aluminum and iron ions leaching from the red soil in central south China. Laboratory experiments were performed by leaching the soil columns with the SAR at a pH range from 2.5 to 5.6 over a 20-day period. Research results showed subjected to acid rain of different acidities, dissolved organic matter (DOM), Fe and Al ions were leached out from red soil into eluate, huge leaching loss tended to occur in the initial phase of the leaching and the higher the acidity of simulated acid rain was, the bigger the loss of them from red soil. There was a very good linear correlation between DOMs and dissolved Al and Fe in the eluates, squared correlation coefficient (R-2) were respectively 0.93839 and 0.9479. These results contributed to build the theoretical foundation for assessing the potential environmental risks of groundwater.

关键词： simulated acid rain red soil soil organic matters (SOM) inorganic aluminum iron

来源：评论

学校读者我要写书评

暂无评论

影响棉花化学打顶施药机车喷雾效果与产量的多因素分析

引用

中国棉花 2016年第4期43卷 11-13页

作者：王刚张鑫陈兵叶春秀王旭文韩焕勇赵海新疆农垦科学院新疆石河子832000 新疆石河子农业科学研究院棉花所新疆石河子832000

施药机车喷雾效果对化学打顶剂在棉花上的沉积分布性能及产量起决定性作用。开展对机力牵引式喷药机在不同作业、喷雾压力及喷雾距离下的喷雾效果进行试验研究,应用正交分析方法分析了各因素对喷雾效果与产量的影响。结果表明:喷头至棉... 详细信息

施药机车喷雾效果对化学打顶剂在棉花上的沉积分布性能及产量起决定性作用。开展对机力牵引式喷药机在不同作业、喷雾压力及喷雾距离下的喷雾效果进行试验研究,应用正交分析方法分析了各因素对喷雾效果与产量的影响。结果表明:喷头至棉花顶尖距离20cm,喷雾压力0.4 MPa,喷药机作业速度4km·h-1时,顶部叶片雾化效果优,打净率92%,产量为6255kg·hm-2,打药机车作业效果最好,经济效益最高。

关键词：棉花化学打顶喷雾效果产量多因素

来源：评论

学校读者我要写书评

暂无评论

Upwelling and anthropogenic forcing on phytoplankton productivity and community structure changes in the Zhejiang coastal area over the last 100 years

引用

Acta Oceanologica Sinica 2014年第10期33卷 1-9页

作者： DUAN Shanshan XING Lei ZHANG Hailong FENG xuwen YANG Haili zhao Meixun Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China) Ministry of Education Qingdao Collaborative Innovation Center of Marine Science and Technology Second Institute of Oceanography State Oceanic Administration

Phytoplankton productivity and community structure in marginal seas have been altered significantly during the past three decades, but it is still a challenge to distinguish the forcing mechanisms between climate change and anthropogenic activities. High time-resolution biomarker records of two 210Pb-dated sediment cores（#34： 28.5°N, 122.272°E; CJ12-1269： 28.861 9°N, 122.515 3°E） from the Min-Zhe coastal mud area were compared to reveal changes of phytoplankton productivity and community structure over the past 100 years. Phytoplankton productivity started to increase gradually from the 1970 s and increased rapidly after the late 1990 s at Site #34; and it started to increase gradually from the middle 1960 s and increased rapidly after the late 1980 s at Site CJ12-1269. Productivity of Core CJ12-1269 was higher than that of Core #34. Phytoplankton community structure variations displayed opposite patterns in the two cores. The decreasing D/B（dinosterol/brassicasterol） ratio of Core #34 since the 1960 s revealed increased diatom contribution to total productivity. In contrast, the increasing D/B ratio of Core CJ12-1269 since the 1950 s indicated increased dinoflagellate contribution to total productivity. Both the productivity increase and the increased dinoflagellate contribution in Core CJ12-1269 since the 1950–1960s were mainly caused by anthropogenic activities, as the location was closer to the Changjiang River Estuary with higher nutrient concentration and decreasing Si/N ratios. However, increased diatom contribution in Core #34 is proposed to be caused by increased coastal upwelling, with higher nutrient concentration and higher Si/N ratios.

关键词： biomarkers phytoplankton community structure Min-Zhe coastal mud area Changjiang Diluted Water upwelling

来源：评论

学校读者我要写书评

暂无评论

中国主要农作物种子质量网络信息系统的开发——以玉米为例

引用

山东农业科学 2016年第12期48卷 151-155页

作者：江绪文韩辉宋希云李贺勤李浩袁桢王玺赵光武王建华青岛农业大学青岛市主要农作物种质创新与应用重点实验室山东青岛266109 青岛农业大学农学与植物保护学院/山东省旱作农业技术重点实验室山东青岛266109 青岛农业大学经济与管理学院山东青岛266109 沈阳农业大学农学院辽宁沈阳110866 浙江农林大学农学与食品科学学院浙江临安311300 中国农业大学农学院北京100093

为促进中国主要农作物市售种子质量信息的共享与应用,研发了基于B/S架构+***+Microsoft SQL Server的中国主要农作物种子质量网络信息系统,其服务器端程序集和用户端(浏览器端)分别应用C#语言和XHTML+Java Script开发,主要包括共性数据... 详细信息

为促进中国主要农作物市售种子质量信息的共享与应用,研发了基于B/S架构+***+Microsoft SQL Server的中国主要农作物种子质量网络信息系统,其服务器端程序集和用户端(浏览器端)分别应用C#语言和XHTML+Java Script开发,主要包括共性数据查询、种子质量评价鉴定核心数据查询、种子及幼苗图像查询、种子质量信息交流4种功能。利用该系统实现了2012年以来我国玉米主产区各年度主要市售玉米品种样品种子质量信息的查询与交流,有效解决了长期以来我国在市售玉米种子质量数据信息收集、使用和管理上缺乏平台、用户对种子质量信息了解不全面等系列问题。该系统的开发、应用及完善将在保障我国种子质量,促进现代种业快速发展中发挥重要作用。

关键词：种子质量主要农作物玉米信息系统浏览器/服务器模式

来源：评论

学校读者我要写书评

暂无评论

Stereo Matching Algorithm of Color Image Based on Weber's Law and Census

Stereo Matching Algorithm of Color Image Based on Weber's La...

引用

International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)

作者： Qiang Wu Xiangnan zhao xuwen Li College of Electronic Information and Control Engineering Beijing University of Technology Beijing China College of Life Science and Bioengineering Beijing University of Technology Beijing China

The algorithm presented here is used on unmanned aerial vehicles system. In 2013,*** proposed a matching cost computation model(or function), This matching cost model combined three kinds of constraints, the cost function is formulated by combining three individual costs:a cost computed on an extended census transformation of the images, the absolute difference cost, taking into account information from colour channels, and a cost based on the principal image *** show that the cost function is excellent performance in similar *** it to the stereo matching of ancient buildings, it is favorable for practical. However, this experiment, in color mutated region, leaded to blurred ***, our proposed method added color space structural information, which based on HVS Weber's law, to the cost function. we use the differential excitation of WLD reflects the structure of color *** robust cost measures can reduce percent of bad pixels in mutated color region. The proposed method use color image, which is used after epipolar line rectification.

关键词： Image color analysis Cost function Transforms Robustness Computed tomography Stereo vision Skeleton

来源：评论

学校读者我要写书评

暂无评论

化学打顶剂在新疆棉花生产中的研究与应用

引用

中国棉花 2015年第10期42卷 8-10页

作者：王刚张鑫陈兵王旭文韩焕勇王方永赵海新疆农垦科学院新疆石河子832000 新疆石河子农业科学研究院棉花所新疆石河子832000

化学打顶是利用植物生长调节剂强制延缓或抑制棉花顶尖的生长。从而达到调节营养生长与生殖生长的目的。化学打顶剂作为抑制棉花顶尖和群尖的一种化学制剂,以其操作便捷、可在一定程度上代替人工打顶、降低用工成本、提高劳动生产率而... 详细信息

化学打顶是利用植物生长调节剂强制延缓或抑制棉花顶尖的生长。从而达到调节营养生长与生殖生长的目的。化学打顶剂作为抑制棉花顶尖和群尖的一种化学制剂,以其操作便捷、可在一定程度上代替人工打顶、降低用工成本、提高劳动生产率而受到新疆地方和兵团植棉团场的重视,并展现出了很好的应用前景。本文综述了目前棉花化学打顶剂的试验研究和大田示范推广应用概况,并对现阶段在新疆使用面积较大的几种化学打顶剂产品施用方法进行了介绍,同时对化学打顶剂在新疆的应用前景进行了展望。

关键词：化学打顶剂新疆棉花研究应用

来源：评论

学校读者我要写书评

暂无评论

Study on Mechanical Behavior of Masonry Wall in School Building Reinforced by CFRP

Study on Mechanical Behavior of Masonry Wall in School Build...

引用

2013 International Conference on Materials Engineering and Mechanical Automation(MEMA 2013)

作者： Hong Lin zhao Yang xuwen Wang Xiang Ke Design and research institute Wuhan University of Technology Institute of Urban Construction Wuhan University of Science and Technology

CFRP is a new kind of building materials popularly used in structure *** order to study the reinforcement technique for masonry walls of school buildings,the walls with window opening strengthened by CFRP were studied in the *** on the experiment result,the finite element simulation and theoretical calculation analysis were done to study the mechanical behavior and shear capacity of the wall with window opening reinforced by *** CFRP pasted at the corner of window opening were proved to be effectively in improving shear capacity of the walls,and simple calculation formulas of shear capacity were provided in the paper,which proved to be accurate.

关键词： CFRP Masonry structure Mechanical behavior Shear capacity

来源：评论

学校读者我要写书评

暂无评论

煤液化油窄馏分临界性质的研究(Ⅱ)假临界压力

引用

洁净煤技术 2014年第6期20卷 89-91,96页

作者：朱肖曼毛学锋张晓静单贤根章序文赵渊煤炭科学技术研究院有限公司煤化工分院北京100013 煤炭资源高效开采与洁净利用国家重点实验室北京100013 中国神华煤制油化工有限公司上海研究院上海201108

为考察石油馏分假临界压力的经验关联式对神华煤液化油窄馏分的适用性，对神华煤液化油300℃之前馏分进行实沸点实验，切割成8个窄馏分，利用基团贡献法计算得到110~200℃馏分的假临界压力计算值随着蒸馏温度的升高而增大，200~300℃馏... 详细信息

为考察石油馏分假临界压力的经验关联式对神华煤液化油窄馏分的适用性，对神华煤液化油300℃之前馏分进行实沸点实验，切割成8个窄馏分，利用基团贡献法计算得到110~200℃馏分的假临界压力计算值随着蒸馏温度的升高而增大，200~300℃馏分的假临界压力随着蒸馏温度的升高而减小。采用不同计算关联式得到的窄馏分假临界压力与基团贡献法计算值相比较，由周佩正推荐式得到的假临界压力计算结果优于其他关联式，除150~180、180~200和220~240℃馏分外，其他馏分的假临界压力计算值与基团贡献法计算值的相对误差都在5％之内。

关键词：煤液化生成油窄馏分假临界压力关联式

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：