Results 111 to 120 of about 10,132 (156)

基于多源遥感宁夏引黄灌区季节性土壤盐分反演模型构建

open access: yesShuitu Baochi Xuebao
目的土壤盐渍化问题已成为制约农业可持续发展与区域生态平衡的主要障碍。鉴于土壤盐渍化在不同季节具有显著的时空变化特征,结合遥感技术与机器学习方法,基于各季节光谱特征的差异性,旨在为农业生产决策与土地资源管理提供精准支撑。方法以宁夏回族自治区礼和乡为研究区,基于Sentinel-1 SAR后向散射系数、Sentinel-2多光谱反射率及衍生指数(盐分指数、植被指数、纹理特征)、Landsat-9地表温度(LST)及SRTM地形因子构建多源遥感数据集。通过相关性分析与决定系数(R²)初步筛选光谱变量 ...
陈猷   +7 more
doaj  

[Research progress in diagnosis and treatment of non-tumorous salivary gland diseases]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Cong X, Su J, Wu L, Ding C, Li W, Yu G.
europepmc   +1 more source

[Early Alzheimer's disease recognition via multimodal hand movement quality assessment]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yang G   +5 more
europepmc   +1 more source

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