Results 41 to 50 of about 25,326 (175)
"fordi før så skreiv æ Å-G". En studie om andreklassingers valg av stavemåter.
, 2023 The purpose of this master's thesis has been to look at the choices students in Year 2 make when spelling words. The students participating in this research are in the transition between phonological and orthographic writing, and the study will focus on how these students adopt different spelling strategies. The assignment's data material is taken from
openaire +1 more source
Eyes on nature: Embedded vision cameras for terrestrial biodiversity monitoring
Methods in Ecology and Evolution, Volume 15, Issue 12, Page 2262-2275, December 2024.Abstract We need comprehensive information to manage and protect biodiversity in the face of global environmental challenges, and artificial intelligence is required to generate that information from vast amounts of biodiversity data. Currently, vision‐based monitoring methods are heterogenous; they poorly cover spatial and temporal dimensions, overly ...
Kevin F. A. Darras +11 more
wiley +1 more source
Experimentally testing animal responses to prescribed fire size and severity
Conservation Biology, Volume 38, Issue 3, June 2024.Abstract Deserts are often highly biodiverse and provide important habitats for many threatened species. Fire is a dominant disturbance in deserts, and prescribed burning is increasingly being used by conservation managers and Indigenous peoples to mitigate the damaging effects of climate change, invasive plants, and land‐use change. The size, severity,
Tim S. Doherty +4 more
wiley +1 more source
, 2006 以天山北坡三工河流域典型的人工绿洲景观为例,初步研究了干旱区绿洲景观斑块尺度绿洲稳定性,并借助遥感、GIS和数理统计方法,主要利用1978-1998年3期遥感影像数据,提出了景观斑块尺度绿洲稳定性的研究方法．结果表明:(1)绿洲斑块的景观控制力是景观动态变化的自然驱动力,控制力最强的斑块类型应为景观的基质;(2)绿洲景观斑块的转换是自然驱动力和人为驱动力共同作用的结果,但主要是人为干扰和驱动的结果,斑块转换的比例越高,则说明斑块类型的稳定性越低,也说明受人为干扰的程度越大;(3 ...
罗格平, 陈曦, 周成虎
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Importance of habitat heterogeneity in tidal flats to the conservation of migratory shorebirds
Conservation Biology, Volume 38, Issue 1, February 2024.Abstract Understanding species distribution patterns and what determines them is critical for effective conservation planning and management. In the case of shorebirds migrating along the East Asian‐Australasian Flyway (EAAF), the loss of stopover habitat in the Yellow Sea region is thought to be the primary reason for the precipitous population ...
Shangxiao Cai +4 more
wiley +1 more source
, 2010 在GIS/RS的支持下,运用分形理论和景观生态学原理,对阜康绿洲土地利用类型图斑的周长、斑块边缘密度和斑块形状指数的标度-频度关系进行了定量分析。结果表明:①阜康绿洲土地利用类型斑块周长、斑块边缘密度和斑块形状指数的标度-频度双对数关系显著,相关系数均超过0.9,呈高度负相关分布;②阜康绿洲土地利用类型斑块周长、斑块边缘密度和斑块形状指数存在标度-频度的分形关系,不受所选统计标度的影响,这为进一步分析土地利用类型周长-面积的分维数,研究斑块的复杂性与稳定性打下基础 ...
卢磊 +5 more
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Zhongguo shiyan zhenduanxue, 2013 目的通过应用基因敲除（APOE-/-）小鼠的动脉粥样硬化斑块的模型进一步探讨免疫反应在动脉动脉粥样硬化的作用。方法建立小鼠动脉粥样硬化硬化模型。实验小鼠选取Apoe基因敲除（Apoe-/-）小鼠,及与基因敲除小鼠同源的C57BL/6小鼠,并分别随机分为高脂饮食组（Ah、Ch）,正常饮食组（An、Cn）;Ah组及Ch组小鼠给予高脂饮食喂养12周后处死动物,切取主动脉弓并观察粥样斑块形成情况。主动脉标本做HE染色,光镜下观察病理改变;使用免疫组织化学染色方法检测粥样斑块中CD8+T淋巴细胞的含量 ...
冯静, 孟晓萍
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, 2013 古尔班通古特沙漠生物结皮占该沙漠总面积的30％左右,苔藓结皮是其中的优势者,在防风固沙、捕获隐匿降水和水土保持方面发挥着重要的生态作用.自然状态下,该沙漠苔藓结皮多以镶嵌式或纯群状斑块分布,本文从斑块尺度出发,以斑块面积为指标,分析了该沙漠藓类结皮斑块的分布格局和特征.结果表明:(1)在调查的7 372个藓类结皮斑块中,有6 930个斑块的面积在100 cm2以内,占总斑块数目的94％,面积在100 cm2以上的斑块约为442个,占总斑块数的6％.(2)本研究共调查了143 223 cm2苔藓结皮 ...
中国科学院新疆生态与地理研究所,新疆乌鲁木齐830000 +7 more
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, 2006 调查分析了大渡河上游藓类-冷杉天然林下5种主要地表苔藓斑块(锦丝藓、赤茎藓、大羽藓、塔藓及锦丝-大羽藓)的生物量,同时测定了各斑块相关环境因子(斑块表面气温、空气湿度、光照强度及基质湿度等)。对苔藓生物量和相关环境因子进行综合分析表明,不同苔藓斑块的生物量有差异,且不同斑块环境因子也表现出一定的差异性。对斑块生物量与环境因子进行相关分析显示,苔藓斑块生物量与环境因子之间相关性较显著,苔藓生物量特征受空气温度、空气湿度、光照强度、灌木层盖度及草本层盖度等因素影响较大 ...
刘俊华, 包维楷
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Zhongguo shiyan zhenduanxue, 2010 目的探讨颈动脉彩色多普勒超声检测老年脑梗死患者的粥样硬化斑块的临床价值。方法应用彩超多普勒超声对48例老年脑梗死患者（梗死组）和42例无脑梗死老年人（对照组）的颈动脉内中膜厚度（IMT）、斑块类型及斑块形态进行检测。结果梗死组37例颈动脉有不同程度的粥样硬化斑块形成,发生率为77.09%。对照组10例有不同程度的粥样硬化斑块形成,发生率为23.81%,两组比较,差异有统计学意义 ...
赵胜利, 李秀芬, 张宏春, 耿喆
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