Results 21 to 30 of about 2,372 (214)
Predictions of southern migration timing in coastal sharks under future ocean warming
Abstract Projected redistribution of marine species due to ocean warming may undermine current conservation efforts. Yet, there have been few studies on how ocean warming may alter migration timing. Across 5 years of acoustic telemetry data (2018–2022), we determined environmental drivers of southward migration timing for 6 migratory shark species from
Maria H. Manz+16 more
wiley +1 more source
Design and Implementation of 3D Character Animation Based [PDF]
近年来随着三维动画技术的迅速崛起,这种极具真实感的动画形式深受人们的喜爱。相较于二维动画,三维动画的视觉效果更为直观、生动。客家是历史最悠久的汉族民系之一,其历史的悠久性、民系分布的广泛性、地域发展的特殊性、文化的融合性而极具开发价值。因此,将新媒体动漫形式与客家文化相结合,打造客家动漫精品,是弘扬客家精神的新方式,也是发展中华文化创意产业的新突破。 本课题通过三维动画片项目来阐述三维动画的制作流程,着重对三维动画各制作环节的规范和技法的研究。论文首先对三维动画的现状展开分析,介绍了MAYA三维动画技术、
杨剑
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Our study addresses the significant knowledge gap regarding the wintering population and habitat utilization of the Yellow‐breasted Bunting (Emberiza aureola) in Nepal, providing crucial insights that can aid in the conservation of this critically endangered species in wintering grounds.
Hem Bahadur Katuwal+6 more
wiley +1 more source
Design and Implementation of Floating Population Service Management Integrated Information Platform for a Region [PDF]
随着某地区经济的飞速发展,政府部门通过招商引资,扩大消费市场机制,使得该地区在经济、高新技术等各大领域都有了较大的发展。与此同时,外来务工人口正源源不断地涌入该地区的街道办、社区之中。在给该地区周边城市带来活力、繁荣、经济发展的同时,对于外来务工人员及其随迁人员的管理、教育、卫生医疗等问题也日渐凸显。如何采用科学有效的方式对流动人员高效合理的管理途径,已成为当前某地区流动人口管理等相关职能部门的重要研究课题。 本文分析了某地区流动人口管理的现状和规模,结合实际 ...
郭馨
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生命周期、人力资本与家庭房产投资消费的关系——来自全国调查数据的经验证据 [PDF]
本文对生命周期和人力资本与家庭房产消费投资之间关系进行探索分析。对生命周期中的出生年代和年龄效应进行了区分,在出生年代效应方面,出生越早的人对投资房产的兴趣越高;年龄效应则使家庭房产的消费投资在人生命周期的一定阶段达到最大,随后降低,呈现驼峰形曲线。人力资本越高的家庭,对房产消费投资的可能性越低。生命周期与人力资本对家庭房产消费投资存在显著的交互影响,在相同出生年代(或相同年龄)的情况下,人力资本高(教育程度高)的家庭相对人力资本低(教育程度低 ...
Barrett+26 more
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Understanding the spatial ecology and movement of snow leopards is crucial for their long‐term conservation. Our first GPS telemetry study in Nepal revealed that snow leopards of Nepal have much larger home ranges than previously thought and frequently cross international borders.
Samundra Ambuhang Subba+21 more
wiley +1 more source
Filling knowledge gaps in a threatened shorebird flyway through satellite tracking
Satellite tracking highlighted coastal habitats that are potentially important for shorebirds but lack ecological information and conservation recognition, such as those in Southern China and Southeast Asia. At the same time, the distributional data of tracked individuals can direct on‐ground surveys at the lesser known sites to collect information on ...
Ying‐Chi Chan+8 more
wiley +1 more source
随着网络经济的来临,消费者渠道迁徙成为一个普遍的现象,由此也成为西方学者研究的一个热点。但是由于学者们对消费者渠道迁徙行为这一概念的定义不清以及缺乏理论基础,致使研究结论比较较零乱、割裂,缺乏系统性。因此,文章通过体验学习理论,从人物、事件、地点以及时间四个要素定义消费者渠道迁徙这一概念,分析探讨了消费者渠道迁徙行为的主体,客体,迁徙的层次和形式,并创造性的归纳出了消费者渠道迁徙行为的结构维度 ...
周星, 涂红伟, 贾雷
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Freshwater biodiversity in China is threatened by multiple anthropogenic factors, and while there are some reasons to suppose it may be possible to bend the curve of biodiversity loss, the variety of threats and their likely interactions with ongoing climate change provide little basis for optimism. For example, the historic overexploitation of Yangtze
David Dudgeon
wiley +1 more source
The study of Mitochondrial DNA Gene Rearrangement in 4 species of birds(Aves: Falconiformes) [PDF]
线粒体控制区由于进化速率快,被作为分子标记广泛应用于种群遗传学和保护生物学等领域的研究。但最近在许多鸟类的线粒体中都发现控制区存在重复拷贝,并且2个控制区拷贝之间的碱基相似度较高。因此在扩增其中一个控制区基因时可能受到另一个控制区的干扰,而对研究结果产生影响。本研究主要针对隼形目鸟类线粒体DNA(mtDNA)基因组中控制区重复及由此产生的基因重排现象进行研究,初步探讨控制区重复和基因重排产生的过程和机制。 本次实验首次对鹰科中的白头鹞(Circusaeruginosus)、日本松雀鹰 ...
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