Results 31 to 40 of about 19,407 (163)
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang +11 more
wiley +1 more source
基于CHAID算法的病毒性肝炎患者DRGs分组研究 [PDF]
, 2015 目的了解影响患者住院医疗费用的因素,建立drgS病例分组并对各组医疗费用进行分析评价。方法以厦门地区病毒性肝炎患者为研究对象,首先利用单因素和多因素方法分析患者住院医疗费用的影响因素,然后以患者住院医疗费用作为目标变量,通过CHAId模型进行drgS病例分组,最后采用rIV、CV等评价指标分析和评价分组结果。结果对可能影响住院医疗费用的变量进行单因素分析显示,年龄、付费方式、入院情况和是否手术4个因素具有统计学意义,通过多因素分析显示年龄、费用支付方式、入院情况是厦门地区肝炎患者住院费用的主要影响因素 ...
方亚, 曾雁冰, 林鹏
core
How much biotic nativeness matters across human demographic groups
Conservation Biology, EarlyView.Abstract Many central concepts of conservation biology—such as nativeness—are structured by ecological and social factors. However, the social consequences of using these concepts to make conservation decisions remain inadequately understood. Some researchers argue that nativeness, rather than acting as an objective proxy for important ecological ...
Harold N. Eyster, Rachelle K. Gould
wiley +1 more source
Dianci bileiqi, 2009 调研了1980—1995年间在西安电瓷研究所污秽实验室进行的35～500 kV交流线路悬式和电站支柱绝缘子的人工和自然污秽闪络电压的分散性。该人工污秽试验按IEC 60507固体层法进行,自然污秽试验也按类似方法进行。经过对闪络电压变异系数的处理计算表明,按IEC60507的人工污秽闪络电压的变异系数均值约为5%,其双侧95%概率置信上限约为7.3%,自然污秽闪络电压的变异系数均值约为7.7%,其双侧95%概率置信上限约为11.3%。变异系数的计算结果均与国际上的结果能很好地吻合。
邱志贤
doaj
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
火焰发射光谱法定量测定人血清锂的研究——附43例广州地区正常成人血清锂含量测定
Zhongshan Daxue xuebao. Yixue kexue ban, 1987 采用火焰发射光谱法对人血清锂的定量测定进行了研究。实验表明,溶液中锂的检出限为0.4μg/l,浓度与光密度的关系符合Lambert-Beer定律,呈直线正相关(r=0.999995 ...
冼汉隆
doaj
, 2018 采集漳州市某生活垃圾填埋场周围冬夏两季的地表水(包括渗滤液)、土壤以及植物样品,分析9种重金属总量的季节性变化.结果表明,冬季地表水中Zn和As,土壤和植物中的Cd和As的含量均大于夏季,而夏季波动性强于冬季;夏季渗滤液中总Hg的含量明显高于冬季,其余变化不明显.地表水重金属含量均低于地表水环境质量Ⅴ类标准限值,渗滤液中所有重金属含量均低于污水排放二级标准限值.土壤中重金属Cd、As和Pb的污染最重,已达到重度污染,冬季的污染明显高于夏季.冬季植物富集能力强于夏季,细叶芒对Cd的富集能力较强 ...
于珍凤 +5 more
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Automating the analysis of public saliency and attitudes toward biodiversity from digital media
Conservation Biology, EarlyView.Abstract Measuring public attitudes toward wildlife provides crucial insights into human relationships with nature and helps monitor progress toward Global Biodiversity Framework targets. Yet, conducting such assessments at a global scale presents challenges.
Noah Giebink +8 more
wiley +1 more source
, 2018 对虾形态参数测量传统上使用游标卡尺,但误差较大。为提高对虾形态测量的智能化水平,实验录用图像测量技术测量凡纳滨对虾、日本囊对虾和刀额新对虾3个品种的体长、头胸甲长和头胸甲宽,所得结果与游标卡尺测量值比较。实验共测量对虾421尾,获得数据15 156个。基于Bland-Altman作图法和组内相关系数(intraclass correlation coefficient,ICC)开展2种测量方法的一致性评价和重复性评价。结果发现,(1)图像测量技术与游标卡尺测量结果的差值95%以上落在LoA范围内 ...
刘向荣 +4 more
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Conservation Biology, EarlyView.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source