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洪泽湖是南水北调东线工程的重要枢纽.为评估水环境长期变化,于2012—2018年开展逐月水质监测.结合水文气象与淮河水质水量数据,分析洪泽湖水质长期变化趋势及空间分异的驱动因素,结果显示:2012—2018年,洪泽湖总氮、总磷多年平均浓度为1.74和0.081 mg/L,分别为Ⅴ类水和Ⅳ类水,透明度均值为0.48 m,下降趋势不显著,而高锰酸盐指数、叶绿素a多年平均浓度分别为4.13和0.008 ...
2012-2018年巢湖水质变化趋势分析和蓝藻防控建议
巢湖 水质 蓝藻水华 污染防治
2020/9/17
巢湖自1990s中期至2012年间水质明显改善,但是近年来水质改善效果变缓,2018年蓝藻水华面积显著增加,为有效评估巢湖水体环境的变化,通过对2012-2018年巢湖17个点位的逐月调查数据分析阐述了近年来巢湖水质和藻情的变化特征,并在流域空间尺度上分析了巢湖流域水污染治理的进展和不足,为后续治理方向的调整和确定提供支撑.2012-2018年湖区调查数据显示:巢湖湖体总磷和总氮浓度显著升高,铵态...
西北太平洋超强台风Tembin(2012)引起的海表面降温与强混合研究
超强台风Tembin 海表面温度 微波遥感海表面温度数据 微波+红外遥感融合海表面温度数据 Argo浮标 混合率
2020/12/25
鉴于台风等极端海洋环境下现场观测资料的匮乏,本文综合了多源卫星遥感和Argo浮标剖面观测资料分析了西北太平洋和南海上层海洋对超强台风Tembin(2012)的响应。Tembin引起了较强的海表面温度降低,降温主要集中在台风路径附近,最大降温为10.3℃,出现在朝鲜半岛南部的近岸海区;微波+红外遥感融合观测海表面温度数据可以弥补单一微波遥感观测在近岸海区缺测的不足,但观测海表面降温比单一微波遥感观测...
2012-2017年河北省手足口病流行及病原构成特征分析
手足口病 流行特征 肠道病毒 病原谱
2020/8/24
分析2012-2017年河北省手足口病 (hand,footandmouthdisease,HFMD)的流行特征及 病原构成特征,为 HFMD的防控提供科学依据。方法 收集2012-2017年河北省 HFMD病例资料和实验 室检测结果,进行描述流行病学分析。
北京市朝阳区2012-2015年柯萨奇A2型肠道病毒的基因特征分析
手足口病 柯萨奇病毒A2 基因特征
2020/8/24
了解北京市朝阳区手足口病相关柯萨奇A2型肠道病毒(coxsackievirusA2,CVA2)的基因特征。方法 采用5′端非编码区(5′UTR)和VP2基因测序的方法鉴定CVA2病毒;对所有CVA2病毒进行VP1全序列测序,对部分毒株进行编码蛋白全序列测序,并将测得的序列与NCBI数据库中国内外的序列进行比对,构建系统进化树,进行基因特征及分子流行病学分析。
基于鄱阳湖流域五河7个主要入湖控制站1960-2012年的实测径流资料,通过短周期旱涝急转指数,结合TFPW-MK趋势检验法及集合经验模态分解法,分析了鄱阳湖流域旱涝急转事件的时空分布、演变趋势、强度及周期变化等,并探讨了旱涝急转指数的不确定性及旱涝急转事件的成因.结果表明:鄱阳湖流域旱涝急转事件主要分布在3-10月,其中3-6月主要表现为“旱转涝”,7-10月主要表现为“涝转旱”,且不同年代间存...
基于GB/T2828.1(2012)的群序贯优化检验及应用
最优化理论 序贯分析 成败型试验 质量控制
2022/3/21
MONITORING AND ANALYZING THE GEOSPATIAL PATTERNS OF THE PEARL RIVER DELTA (PRD) FROM 1960 TO 2012
Geographical Spatial Patterns Coastal Environment Landuse Coastline
2018/5/15
The Geospatial Patterns Pearl River Delta (PRD), one of the most economically-important and fastest-growing regions in China, have changed remarkably and continuously during the past decades. In this ...
Sand Liquefaction Phenomena During the Seismic Crisis of May 2012 in Emilia, Northern Italy
and boils composition Emilia Romagna earthquake
2018/6/13
In May 2012, the Emilia region of the Po Valley was struck by a seismic crisis with two major events of magnitude Mw 6.1 and Mw 5.9. The first event induced widespread sand blows formed along buried c...
旨在从牛、羊监控动物群中,对流行于我国的帕利亚姆血清群病毒(PALV)进行分离、鉴定与序列特征分析,明确我国流行毒株与国外毒株之间的关系。自监控动物采集的PALV阳性血液接种BHK-21细胞进行病毒分离;对所分离PALV毒株的Seg-7与Seg-2基因节段进行扩增、测序与序列分析;通过高分辨率琼脂糖凝胶电泳分析不同血清型PALV代表毒株基因组的“电泳带型”特征;通过免疫荧光与中和试验分析不同血清型...
THE 2012 EARTHQUAKE: AN ABACUS OF SURVEYS AND INTERVENTIONS IN MANTUA CHURCHES
Survey geomatics earthquake seismic damage cultural heritage
2017/6/20
After the earthquake of 2012, the ecclesiastical heritage of Mantua was so damaged to render unusable many buildings. Especially churches show a higher vulnerability in relation to their architectural...
The role of obesity in the relation between total water intake and urine osmolality in US adults, 2009–2012
effect modification hydration status NHANES obesity water intake
2018/12/19
Background: Adequate water intake is critical to physiologic and cognitive functioning. Although water requirements increase with body size, it remains unclear whether weight status modifies the relat...
Usual nutrient intakes of US infants and toddlers generally meet or exceed Dietary Reference Intakes: findings from NHANES 2009–2012
infants and toddlers nationally representative sample nutrient adequacy recommended intakes usual nutrient intake
2018/12/14
Usual nutrient intakes of US infants and toddlers generally meet or exceed Dietary Reference Intakes: findings from NHANES 2009–2012
infants and toddlers nationally representative sample nutrient adequacy recommended intakes usual nutrient intake
2018/12/18
Background: To our knowledge, few studies have described the usual nutrient intakes of US children aged <2 y or assessed the nutrient adequacy of their diets relative to the recommended Dietary Refere...