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Mapping QTLs for seed yield and drought susceptibility index in soybean (Glycine max L.) across different environments 被引量:10
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作者 Weijun Du Min Wang +1 位作者 Sanxiong Fu Deyue Yu 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2009年第12期721-731,共11页
Drought stress has long been a major constraint in maintaining yield stability of soybean (Glycine max (L.) Merr.) in rainfed ecosystems. The identification of consistent quantitative trait loci (QTL) involving ... Drought stress has long been a major constraint in maintaining yield stability of soybean (Glycine max (L.) Merr.) in rainfed ecosystems. The identification of consistent quantitative trait loci (QTL) involving seed yield per plant (YP) and drought susceptibility index (DSI) in a population across different environments would therefore be important in molecular marker-assisted breeding of soybean cultivars suitable for rainfed regions. The YP of a recombinant line population of 184 F2:7:11 lines from a cross of Kefengl and Nannong1138-2 was studied under water-stressed (WS) and well-watered (WW) conditions in field (F) and greenhouse (G) trials, and DSI for yield was calculated in two trials. Nineteen QTLs associated with YP-WS and YP-WW, and 10 QTLs associated with DSI, were identi- fied. Comparison of these QTL locations with previous findings showed that the majority of these regions control one or more traits re- lated to yield and other agronomic traits. One QTL on molecular linkage group (MLG) K for YP-F, and two QTLs on MLG C2 for YP-G, remained constant across different water regimes. The regions on MLG C2 for YP-WW-F and MLG H for YP-WS-F had a pleiotropic effect on DSI-F, and MLG A1 for YP-WS-G had a pleiotropic effect on DSI-G. The identification of consistent QTLs for YP and DSI across different environments will significantly improve the efficiency of selecting for drought tolerance in soybean. 展开更多
关键词 drought susceptibility index (DSI) QTL mapping seed yield per plant (YP) SOYBEAN
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Lead and Copper Mineral Prospectivity Mapping in Kalatereshm Area, Based on Exploratory Data Sets Using AHP-Index Overlay Modeling in GIS (Semnan Province, North of Iran)
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作者 Seyed Milad Ahmadi Alireza Jafarirad Nima Nezafati 《Journal of Geographic Information System》 2015年第6期677-691,共15页
The Kalatereshm is an area in north of Iran which covers some part of Torud magmatic belt. The area of this belt is about 2000 square kilometers and most of the mines in this particular area are of Copper, lead and Zi... The Kalatereshm is an area in north of Iran which covers some part of Torud magmatic belt. The area of this belt is about 2000 square kilometers and most of the mines in this particular area are of Copper, lead and Zinc. The Synthesis process is done by the Analysis Hierarchy Process (AHP) and Index Overlay (IO) methods. Of previous studies on the area, various companies providing Geological maps and in particular the company of Jiangxi providing its own geochemical maps can be mentioned. The reasons for doing this research and its innovation in Kalatereshm’s sheet can be justified as to be valuable and the fact that we would be able to save in time and cost by doing so. Previous case studies on this particular region lacked the necessary use of an advanced software and method. The informational layers included geochemical layers (the second and first ratings were given to Copper and Lead respectively by weighting based on AHP method), geology layer (the fourth and second ratings were given to Copper and Lead respectively by weighing based on AHP method), fault layer (the first and fourth ratings were given to Copper and Lead respectively by weighting based on AHP method), satellite imagery layer (the third rating was given to both Copper and Lead by weighting based on AHP method) and the more applicable areas for field exploration and detailed procedures of exploration had been determined (the mentioned ratings were delineated by each element’s respective weight in each layer and their importance in the Synthesis of informational layers). 展开更多
关键词 Kalatereshm MINERAL Prospectivity mapping AHP index OVERLAY
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FIXED POINT INDEX THEORY FOR WEAKLY INWARD MAPPINGS
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作者 韩志清 《Acta Mathematica Scientia》 SCIE CSCD 1997年第4期455-462,共8页
In this paper we define a fixed point index theory for locally Lip., completely continuous and weakly inward mappings defined on closed convex sets in general Banach spaces where no other artificial conditions are imp... In this paper we define a fixed point index theory for locally Lip., completely continuous and weakly inward mappings defined on closed convex sets in general Banach spaces where no other artificial conditions are imposed. This makes ns to deal with these kinds of mappings more easily. As obvious applications, some results in [3],[5],[7],[9],[10] are deepened and extended. 展开更多
关键词 weakly inward mappings fixed point index theory differential equations in Banach spaces
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Environmental Sensitivity Index Mapping for Environmental Sustainable Cleanup along NAOC Pipeline, Asemoku, Delta State, Nigeria
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作者 Chineme Christabel Ifuwe Christopher Onosemuode 《Journal of Geographic Information System》 2024年第2期148-165,共18页
During emergency response to oil spills incident accurate information is required in order to reduce the risk associated with oil spill disasters. This study focuses on Environmental Sensitivity mapping for sustainabl... During emergency response to oil spills incident accurate information is required in order to reduce the risk associated with oil spill disasters. This study focuses on Environmental Sensitivity mapping for sustainable environmental clean-up and contingency planning along the 3.0 km of AGIP pipeline at Asemoku in Delta State, Nigeria. Geographic information systems (GIS) techniques were used to create an Environmental Sensitivity Index (ESI) map in the study area. A 2018 Google Earth Satellite imagery of the study area was downloaded, and landuse/cover classification scheme comprising of Vegetation, Farmland, Water Body, Wetland, built up area and Bare Surface was adopted. Existing categorization, ranking and classification of the inland habitat were adopted and used to create a Landuse/cover Environmental Sensitivity Index (ESI) map, while the buffer zones of 100 m, 200 m, 300 m and 400 m were adopted. In the ArcGIS 10.8 environment, the landuse/cover map was generated and buffer distances of 100 m, 200 m, 300 m and 400 m were created on the landuse/cover map to ascertain the features that are vulnerable and could be at risk in the event of oil spill. This study established that the Natural Vegetation areas are the most vulnerable and sensitive feature as a result of their size along the created buffer zones. Findings from this study thus provide insight into the most sensitive land-use/land-cover, in the event of a spill or emergency oil spill clean-up response. 展开更多
关键词 Sensitivity-index-mapping Environmental-Sustainability Land-Use/Land-Cover Asemoku
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Leveraging ROTI map derived from Indonesian GNSS receiver network for advancing study of Equatorial Plasma Bubble in Southeast/East Asia 被引量:1
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作者 Prayitno Abadi Ihsan N.Muafiry +8 位作者 Teguh N.Pratama Angga Y.Putra Suraina Gatot H.Pramono Sidik T.Wibowo Febrylian F.Chabibi Umar A.Ahmad Wildan P.Tresna Asnawi 《Earth and Planetary Physics》 EI CAS 2025年第1期101-116,共16页
This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signa... This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signals and degrade positioning accuracy.Managed by the Indonesian Geospatial Information Agency(BIG),the Indonesia Continuously Operating Reference Station(Ina-CORS)network comprises over 300 GNSS receivers spanning equatorial to southern low-latitude regions.Ina-CORS is uniquely situated to monitor EPB generation,zonal drift,and dissipation across Southeast Asia.We provide a practical tool for EPB research,by sharing two-dimensional rate of Total Electron Content(TEC)change index(ROTI)derived from this network.We generate ROTI maps with a 10-minute resolution,and samples from May 2024 are publicly available for further scientific research.Two preliminary findings from the ROTI maps of Ina-CORS are noteworthy.First,the Ina-CORS ROTI maps reveal that the irregularities within a broader EPB structure persist longer,increasing the potential for these irregularities to migrate farther eastward.Second,we demonstrate that combined ROTI maps from Ina-CORS and GNSS receivers in East Asia and Australia can be used to monitor the development of ionospheric irregularities in Southeast and East Asia.We have demonstrated the combined ROTI maps to capture the development of ionospheric irregularities in the Southeast/East Asian sector during the G5 Geomagnetic Storm on May 11,2024.We observed simultaneous ionospheric irregularities in Japan and Australia,respectively propagating northwestward and southwestward,before midnight,whereas Southeast Asia’s equatorial and low-latitude regions exhibited irregularities post-midnight.By sharing ROTI maps from Indonesia and integrating them with regional GNSS networks,researchers can conduct comprehensive EPB studies,enhancing the understanding of EPB behavior across Southeast and East Asia and contributing significantly to ionospheric research. 展开更多
关键词 Equatorial Plasma Bubble(EPB) GNSS receivers’network Indonesia Continuously Operating Reference Station(Ina-CORS) ionospheric map Rate of TEC change index(ROTI)map
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MAPGIS在甘肃省矿山地质环境分区中的应用 被引量:5
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作者 方世跃 徐步元 +1 位作者 王得楷 李莎莎 《兰州大学学报(自然科学版)》 CAS CSCD 北大核心 2008年第2期33-36,共4页
在MAPGIS技术支持下,采用综合指数模型,将各影响因素按其权重进行空间代数叠加,根据叠加的结果并结合综合评估指数的大小将甘肃省的矿山地质环境分为3级区.其中:严重区23个、较严重区22个、一般区1个,分别占全省总面积的2.731%,7.380%和... 在MAPGIS技术支持下,采用综合指数模型,将各影响因素按其权重进行空间代数叠加,根据叠加的结果并结合综合评估指数的大小将甘肃省的矿山地质环境分为3级区.其中:严重区23个、较严重区22个、一般区1个,分别占全省总面积的2.731%,7.380%和89.889%. 展开更多
关键词 矿山地质环境 图层叠加 加权指数模型 甘肃省
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基于Map Xtreme2004的西安旅游信息系统设计开发 被引量:2
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作者 卫海燕 杨小鹏 郝选文 《陕西师范大学学报(自然科学版)》 CAS CSCD 北大核心 2007年第2期108-111,共4页
依据陕西省旅游资源调查、分类与评价项目获取的数据,采用原型法和面向对象相结合的系统设计方法,建立了面向旅游管理部门和广大游客的西安旅游信息系统.系统中关于旅游数据的采集管理、空间信息检索、电子地图控制、辅助决策、景点虚... 依据陕西省旅游资源调查、分类与评价项目获取的数据,采用原型法和面向对象相结合的系统设计方法,建立了面向旅游管理部门和广大游客的西安旅游信息系统.系统中关于旅游数据的采集管理、空间信息检索、电子地图控制、辅助决策、景点虚拟展示、旅游信息动态发布等功能,为旅游管理部门实现科学管理提供了可靠依据,也为游客方便快捷地展现了西安地区旅游资源信息. 展开更多
关键词 旅游信息系统 map Xtreme2004 信息检索 辅助决策
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乌龙岭龙眼防腐抗褐变与MAP保鲜技术研究 被引量:1
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作者 何志刚 李维新 +2 位作者 林晓姿 陆东和 庄林歆 《江西农业大学学报》 CAS CSCD 北大核心 2005年第6期867-871,共5页
以乌龙岭龙眼为原料,筛选龙眼防腐褐变保鲜剂,研究确定其MAP保鲜技术.实验表明:以半胱氨酸、硫脲、尿素、2,4-D及磷酸二氢钾组成的保鲜剂处理对抑制龙眼果皮褐变均有效果,其中以加有半胱氨酸或硫脲的B、D保鲜剂处理的综合保鲜效果最好;... 以乌龙岭龙眼为原料,筛选龙眼防腐褐变保鲜剂,研究确定其MAP保鲜技术.实验表明:以半胱氨酸、硫脲、尿素、2,4-D及磷酸二氢钾组成的保鲜剂处理对抑制龙眼果皮褐变均有效果,其中以加有半胱氨酸或硫脲的B、D保鲜剂处理的综合保鲜效果最好;乌龙岭龙眼MAP保鲜的最佳参数为,贮藏温度(5±1)℃,PE膜厚度0.03 mm,单位透气面积的装果量为5~7 kg.贮藏40 d好果率达96.5%,褐变指数为68.4%,果肉可溶性固形物为20.2%,总糖15.6%,还原糖2.9%,百克果肉含维生素C 74.6 mg. 展开更多
关键词 乌龙岭龙眼 map保鲜 好果率 褐变指数
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不同载荷指标的模拟HyMap数据质量评价
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作者 霍红元 周萍 倪卓娅 《国土资源遥感》 CSCD 2011年第4期52-57,共6页
从图像预处理和地学应用两个角度对不同载荷指标的模拟HyMap数据质量进行评价。在图像预处理角度上,利用图像的均方差异常、直方图异常、数据相关异常等3个参量分别对模拟HyMap图像质量加以分析和评价;在模拟数据的地学应用角度上,利用... 从图像预处理和地学应用两个角度对不同载荷指标的模拟HyMap数据质量进行评价。在图像预处理角度上,利用图像的均方差异常、直方图异常、数据相关异常等3个参量分别对模拟HyMap图像质量加以分析和评价;在模拟数据的地学应用角度上,利用模拟的HyMap数据进行矿化蚀变信息提取和矿物填图。通过对提取信息的种类、数量及矿物填图精度的分析,获得了对不同载荷指标和不同尺度模拟HyMap数据质量评价方法的许多重要认识。 展开更多
关键词 Hymap数据质量评价 图像预处理 信息提取 矿物填图 载荷指标
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MAP晶体捕集反应器回收猪场厌氧消化液中磷的研究 被引量:4
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作者 钱锋 宋永会 +2 位作者 向连城 袁芳 葛杰 《环境科学学报》 CAS CSCD 北大核心 2014年第12期2991-2997,共7页
研究了磷酸铵镁(MAP)结晶法晶体捕集反应器在曝气条件下回收猪场厌氧消化液中磷元素的能力.结果表明,利用曝气方式提高猪场厌氧消化液的p H值,进行MAP结晶回收磷完全可行.MAP的饱和度指数(SI)与废水p H值呈多项式函数关系,结晶反应的最... 研究了磷酸铵镁(MAP)结晶法晶体捕集反应器在曝气条件下回收猪场厌氧消化液中磷元素的能力.结果表明,利用曝气方式提高猪场厌氧消化液的p H值,进行MAP结晶回收磷完全可行.MAP的饱和度指数(SI)与废水p H值呈多项式函数关系,结晶反应的最佳p H值为8.5~9.0;随着曝气时间延长至180 min,反应器内废水p H值可提高至8.5;常温下(25℃),反应器内MAP回收磷的反应动力学的反应级数(n)为1.98,速率常数(K25)为7.04×10-4L·mg-1·min-1;反应器单个运行周期为270 min;磷的平均去除率为82%左右.MAP晶体捕集反应器上的晶体在一个反应周期内即可成形,随着反应周期的增加,晶体颗粒逐渐增大.利用扫描电镜和X射线衍射仪对捕集器所捕集的晶体进行了表征,证实晶体为高纯度的MAP. 展开更多
关键词 map 曝气 磷回收 猪场厌氧消化液 饱和度指数 反应动力学
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不同浓度罗哌卡因腰硬联合麻醉对妊娠期糖尿病产妇剖宫产术后VAS评分及MAP指标的影响 被引量:8
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作者 吴灵肖 夏静 祝丽娇 《糖尿病新世界》 2023年第7期14-17,22,共5页
目的分析妊娠期糖尿病(gestational diabetes mellitus,GDM)产妇采取不同浓度的罗哌卡因腰硬联合麻醉实施剖宫产术对其MAP指标和VAS评分的影响。方法选取2021年2月—2022年2月厦门大学附属妇女儿童医院(厦门市妇幼保健院)收治的采取罗... 目的分析妊娠期糖尿病(gestational diabetes mellitus,GDM)产妇采取不同浓度的罗哌卡因腰硬联合麻醉实施剖宫产术对其MAP指标和VAS评分的影响。方法选取2021年2月—2022年2月厦门大学附属妇女儿童医院(厦门市妇幼保健院)收治的采取罗哌卡因麻醉的剖宫产手术的GDM产妇90例为研究对象,随机分为A组、B组、C组,各30例,3组分别采用0.25%、0.375%、0.5%的罗哌卡因,对比3组麻醉相关指标、生命体征、术后VAS评分、微循环指标及不良反应情况。结果与A组和B组相比,C组感觉阻滞平面、Bromage评分更高,感觉阻滞时间更长,剖宫产术后2、4 h的静态VAS评分、动态VAS评分更低,术后24、48 h甲襞微循环指标更高,差异有统计学意义(P<0.05)。与B组和C组相比,A组麻醉15 min时,MAP更高、HR更低、不良反应更少,差异有统计学意义(P<0.05)。结论对于GDM产妇剖宫产来讲,浓度不同的罗哌卡因麻醉效果均良好,其中浓度0.5%有更好的镇痛效果,且对微循环影响更小;0.25%对血流动力学影响更小,不良反应更少. 展开更多
关键词 剖宫产 map指标 罗哌卡因 VAS评分 妊娠期糖尿病 不良反应 腰硬联合麻醉
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基因组Mapping系统索引构建原理 被引量:2
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作者 国宏哲 王亚东 《智能计算机与应用》 2012年第4期47-49,共3页
基因组mapping是将由高通量测序技术产生的大量短read数据映射到人类参考基因组,对基因组表达量分析,SNP位点预测及疾病预测有重要意义。首先,介绍基因组mapping的研究背景和研究现状,介绍mapping系统中索引构建的基本概念和主要方法,... 基因组mapping是将由高通量测序技术产生的大量短read数据映射到人类参考基因组,对基因组表达量分析,SNP位点预测及疾病预测有重要意义。首先,介绍基因组mapping的研究背景和研究现状,介绍mapping系统中索引构建的基本概念和主要方法,并重点分析基于BWT结构的索引构建原理,同时也介绍序列比对的主要加速方法。最后,以总结BWT技术和mapping系统索引构建中涉及的相关方法和原理,揭示了新型索引技术的本质。 展开更多
关键词 高通量测序 基因组mapping 索引 BWT结构
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基于Map/Reduce的索引数据云存储模型研究 被引量:8
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作者 陆小丽 何加铭 《宁波大学学报(理工版)》 CAS 2011年第3期29-33,共5页
针对目前搜索引擎引擎系统存在的数据量庞大、访问用户高并发性和搜索延迟性的特点,提出了基于云存储的文档索引分类存储模型,并在索引数据分类存储算法实现过程中,采用基于Map/Reduce编程模型的二次索引词权重计算,以降低分类过程中的... 针对目前搜索引擎引擎系统存在的数据量庞大、访问用户高并发性和搜索延迟性的特点,提出了基于云存储的文档索引分类存储模型,并在索引数据分类存储算法实现过程中,采用基于Map/Reduce编程模型的二次索引词权重计算,以降低分类过程中的模糊粒度.通过实验验证基于该存储模型的算法不仅可以提高海量数据索引库的数据处理效率,而且在一定程度上降低了检索系统查询延迟,提高了搜索效率. 展开更多
关键词 搜索引擎 权重 map/REDUCE 索引
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一种针对大规模Read Mapping的高效DBG索引方法 被引量:1
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作者 于长永 李俊杰 +1 位作者 马海涛 赵宇海 《东北大学学报(自然科学版)》 EI CAS CSCD 北大核心 2023年第6期770-776,共7页
为了能够回答生物信息学中关于de Bruijn graph(DBG)的两个问题——①对于任意的k-mer,回答其是否为DBG的顶点,②对于DBG的任意顶点,回答其邻接信息(入边和出边),提出了一种针对大规模read mapping的高效DBG索引方法.本文将以上两个问... 为了能够回答生物信息学中关于de Bruijn graph(DBG)的两个问题——①对于任意的k-mer,回答其是否为DBG的顶点,②对于DBG的任意顶点,回答其邻接信息(入边和出边),提出了一种针对大规模read mapping的高效DBG索引方法.本文将以上两个问题转化为非重复多路径上的k-mer和(k+1)-mer的确切查找问题,并利用FM-index进行解决.首先,对给定的参考序列进行压缩,即非重复多路径的发现,从而压缩了序列中大量存在的重复(k+1)-mer.其次,基于非重复多路径FM-index对DBG进行索引.查找k-mer是否出现在DBG上,若找到,给出该k-mer的直接前驱和直接后继结点,从而提高时空效率.最后,在62种大肠杆菌菌株的基因组上进行实验.实验结果表明,所提出的方法可以高效地对多参考序列的DBG进行索引. 展开更多
关键词 de Bruijn graph 索引 read mapping(序列映射) FM-index 参考序列
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基于MAPX的MapInfo数据空间索引的建立 被引量:4
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作者 洪洲 《测绘与空间地理信息》 2013年第3期118-121,124+128,共6页
空间索引技术在诸多领域均有十分重要的研究意义,目前已存在很多种建立方法,各有优缺点。MapInfo软件功能强大易用,但不具有建立空间索引这项功能,因此本文主要研究在MAPX基础上建立一种适合MapInfo数据的空间索引。该方法主要针对车载... 空间索引技术在诸多领域均有十分重要的研究意义,目前已存在很多种建立方法,各有优缺点。MapInfo软件功能强大易用,但不具有建立空间索引这项功能,因此本文主要研究在MAPX基础上建立一种适合MapInfo数据的空间索引。该方法主要针对车载导航系统中的一个基本算法地图匹配来进行研究。采用单层规则格网建立的空间索引并对其进行改进,在第一步划分的基础上再次进行网格划分,建立起两级交错式划分方法的空间索引。通过实验表明该方法使实时路段搜索过程的实现简单、方便、明了。 展开更多
关键词 mapINFO mapX 空间索引 地图匹配 GPS
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Google map的数据管理和表现机制的讨论研究 被引量:1
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作者 侯立鹏 《计算机光盘软件与应用》 2011年第16期94-94,共1页
Google作为全球最大的搜索引擎,将GoogleMap加入其服务范围内,它集成了全球不同分辨率的遥感图像。Ajax技术改变了传统的客户端与服务器端进行交互的方式,进一步提高了GoogleMap的友好交互界面,增强了其服务质量。
关键词 GooSemap 数据分片 QRST索引 分片算法 AJAX
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Application of Index Analysis to Evaluate the Water Quality of the Tuul River in Mongolia 被引量:2
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作者 Ochir Altansukh G. Davaa 《Journal of Water Resource and Protection》 2011年第6期398-414,共17页
A study of water pollution determinands of the Tuul River was carried out in surrounding area of Ulaanbaatar, the capital of Mongolia at 14 monitoring sites, using an extensive dataset between 1998 and 2008. An index ... A study of water pollution determinands of the Tuul River was carried out in surrounding area of Ulaanbaatar, the capital of Mongolia at 14 monitoring sites, using an extensive dataset between 1998 and 2008. An index method, developed by Ministry of Nature and Environment of Mongolia, applied for assessment and total, seven hydro-chemicals used in the index calculation. The research indicates that the Tuul River is not polluted until the Ulaanbaatar city and the contamination level spike appears when the river entering the city. The upper reaches of the river and tributaries have relatively good quality waters. Several pollution sources exist in the study area. Among them, the Central Wastewater Treatment Plant (CWTP) is a strongest point source in the downstream section of the river, recently. Pollutions at sites 7-10 are strongly dependant effluent treatment levels from the plant, and it contains a high amount of chemicals that can cause of major decrement of the water quality. This would definitely kill aquatic fauna in the stretch of the river affected. It certainly happened in 2007. The general trend of water quality gradually has been decreased in the study period. Clearly, there is a need to improve the water quality in the Tuul River in surrounding area of the Ulaanbaatar. In order to change this situation, operation enhancement of treatment plants, a water quality modeling and artificial increment of dissolved oxygen concentrations become crucial to improve the water quality significantly. Perhaps a new wastewater treatment plant is needed for Ulaanbaatar city. 展开更多
关键词 Tuul RIVER WATER QUALITY Assessment POLLUTION Point Source WATER QUALITY map WATER QUALITY index
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冠心病患者心指数和MAP与抗氧化系统活性和心血管不良事件的关系 被引量:4
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作者 叶广森 陈湛生 王莉 《包头医学院学报》 CAS 2018年第6期26-27,30,共3页
目的:探讨冠心病患者心指数和平均动脉压(mean arterial pressure,MAP)与抗氧化系统活性和心血管不良事件的关系。方法:随机选取诊治的冠心病患者105例,根据心指数分为<4.5 L/min/m^2(65例)和≥4.5 L/min/m^2(40例),另根据MAP值为65 ... 目的:探讨冠心病患者心指数和平均动脉压(mean arterial pressure,MAP)与抗氧化系统活性和心血管不良事件的关系。方法:随机选取诊治的冠心病患者105例,根据心指数分为<4.5 L/min/m^2(65例)和≥4.5 L/min/m^2(40例),另根据MAP值为65 mm Hg为分界点进行分组,检测两组抗氧化系统超氧化物歧化酶(Superoxide Dismutase,SOD)、谷胱甘肽过氧化物酶(glutathione peroxidase,GP)和过氧化氢酶(catalase,CAT)的水平,并分析其与不良事件发生率的相关性。结果:心指数<4.5 L/min/m^2组抗氧化指标SOD、GP和CAT均高于心指数≥4.5 L/min/m^2(P<0.05);MAP<65 mm Hg组患者上述抗氧化指标与MAP≥65 mm Hg比较差异无统计学意义(P>0.05);随访6个月发现,心指数≥4.5 L/min/m^2和MAP≥65 mm Hg组患者合并心血管不良事件包括再发心绞痛、再发心肌梗塞、恶性心律失常和心脏猝死,各组不良事件发生率比较差异有统计学意义(P<0.05)。结论:冠心病患者心指数越高,并发氧化应激反应越严重,同时增加了心血管不良事件发生率。 展开更多
关键词 冠心病 心指数 map 抗氧化系统 心血管不良事件
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LINEAR DILATATION OF QUASIREGULAR MAPPINGS IN SPACE 被引量:2
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作者 陈克应 《Acta Mathematica Scientia》 SCIE CSCD 2001年第2期213-220,共8页
This paper presents an explicit upper bound for the linear dilatation of K- quasiregular (K-qr) mappings, which improves S. Rickman's [6, P.37] corresponding re- sult for K-qr mappings and generalizes P. Seittenra... This paper presents an explicit upper bound for the linear dilatation of K- quasiregular (K-qr) mappings, which improves S. Rickman's [6, P.37] corresponding re- sult for K-qr mappings and generalizes P. Seittenranta's [7, Theorem 1.5] result for K- quasiconformal (K-qc) maps. 展开更多
关键词 K-qr mapping K-qc map linear dilatation local index MODULUS normal domain
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FREDHOLM AND COMPACT MAPPINGS SHARING A VALUE
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作者 J.M.Soriano 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2001年第6期682-686,共5页
Sufficient conditions are given to assert that two differentiable mappings between Banach spaces have common values. The proof is essentially based upon continuation methods.
关键词 zero point continuation methods C 1 HOMOTOPY surjective implicit function theorem compact mapping Fredholm mapping index zero INJECTIVE DIFFEOMORPHISM
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