Results 61 to 70 of about 1,703,447 (187)
, 2009 以高分辨率遥感影像为本底数据的最新新疆地貌数据,能提高定量化地貌格局分析结果的准确性、客观性和科学性。本文利用地学统计和GIS空间分析方法,基于最新新疆地貌数据,定量化分析了地貌的分布特征、空间格局。结果表明:(1)大地貌单元中,平原地貌约占新疆总面积的1/3;(2)地势分级,中海拔地貌占绝对优势,约占全疆总面积1/2;(3)形态类型中,丘陵地貌在地势起伏中占主导地位,面积最大,主要分布在两大沙漠中,以沙丘形式分布;(4)基本地貌类型,中海拔丘陵最多,占总面积的21.417%;(5)成因类型中,流水 ...
柴慧霞, 程维明, 陈曦, 周成虎
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Gaoya dianqi, 2017 电力设备运行的健康状态直接影响着电力系统的安全稳定。基于数据挖掘技术,利用主成分分析方法对反映电力设备状态的海量数据进行了深入分析,形成了融合电力设备状态关键参量信息的主成分体系。基于该主成分体系,建立了电力设备运行状态的综合评价模型,实现了电力设备健康状态的动态评估和异常状态的快速检出。文中以变压器绝缘状态评估为例,证明了文中提出的方法可以弥补传统的状态评估方法的不足,具有一定的可靠性和实用性。
贺川双 +5 more
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Powerful representation of the poor? German welfare associations' narrative advocacy during COVID‐19
Policy Studies Journal, Volume 54, Issue 3, August 2026.Abstract The COVID‐19 pandemic sparked unprecedented experimentation in the German social assistance system, leading to changes previously considered impracticable by policymakers. This included a sanctions moratorium, easier access to benefits, and temporary cash transfers, all of which were advocated by welfare associations—key organized interests ...
Christopher Smith Ochoa
wiley +1 more source
, 2004 蔷薇属植物广泛分布于世界各地,在我国有80余种,其中许多具有药用价值。该属植物的叶片和果实中含有槲皮素、山奈酚、芦丁等多种黄酮类化合物和齐墩果酸、乌苏酸等三萜化合物。腺叶蔷薇(RosakokanicaRegelexJuzep)主要分布于新疆,生长在海拔1500-2500m的山坡及林缘,其果实具有活血化淤、去风除湿和解毒收敛的功效。由于该植物果实的化学成分还未见报道,我们利用高效液相色谱-电喷雾串联质谱对其提取物进行分析,从所获得的紫外和质谱信息,并参考与之生源相近的同属其它植物化学成分研究的结果 ...
丁立生, 周燕, 黄胜雄, 李锐
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New Phytologist, Volume 251, Issue 1, Page 207-227, July 2026.Network of VAMP714‐dependent interactions during salt stress. Summary Plant responses to salt stress include an altered root architecture mediated by ion imbalances, reactive oxygen species (ROS) accumulation, and altered hormonal responses. Auxin is implicated in these processes.
Jialei Sun +3 more
wiley +1 more source
Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT In an era of proliferating but divergent data protection regimes, the European Union's rights‐based approach and China's sovereignty‐centric model have become two dominant poles of global data governance. This article examines how multinational enterprises navigate compliance under these dual systems and how that compliance is shaped through ...
Yiping Cao
wiley +1 more source
, 2010 新疆灌木植物共416种(包括20个变种),隶属于109属,35科。对新疆灌木区系科、属的组成和地理成分进行分析,结果表明:新疆灌木植物地理成分多样,区系性质以温带为主。在科级水平上,除去世界分布科,温带分布科占80%。在属级水平上,北温带分布、旧世界温带分布和温带亚洲分布共有54属,占新疆灌木植物非世界属的56.25%;植物区系的种类趋向于集中在有限的少数科内,单种属和寡种属居多,区系的优势现象比较明显;在属的水平上,北温带成分和地中海成分占优势,分别占总属数的37.5%和23.96%,无中国特有成分 ...
梁雪琼, 周华荣, 黄世光
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Governing by Ambiguity: Sociotechnical Imaginaries of Platforms in China
Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT Besides clear policy directives, the unresolved and open‐ended elements in policy communication also create discursive politics. This article argues that ambiguity in policy communication reflects the state's exercise of power within a fractured sociocultural landscape.
Fangyu Qing, Ngai Keung Chan
wiley +1 more source
, 2008 运用主成分分析方法,按照简要、可行的原则,建立了覆盖3个方面共13个指标的城市综合实力指标体系。对塔里木盆地的5个设市城市和37个县政府驻地镇的综合实力进行计算和比较。运用SPSS13.0统计软件对上述指标进行标准化处理,用方差最大法正交旋转,并通过载荷系数分析得出五个主成分,将各主成分得分结合主成分权重进行计算,得出塔里木盆地各城镇的综合实力值。城镇综合实力排名前七位的城镇分别是库尔勒市、阿克苏市、库车县、喀什市、轮台县、和田市、阿图什市。从总体上看,城镇综合实力以库尔勒市为起点,沿逆时针方向递减分布。
张小雷, 段祖亮
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Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT AI‐generated images have become so good in recent years that individuals often cannot distinguish them from ‘real’ images. This development, combined with the rapid spread of AI‐generated content online, creates a series of societal risks. Watermarking, a technique that involves embedding information within the content to indicate their AI ...
Bram Rijsbosch +2 more
wiley +1 more source