Results 11 to 20 of about 52,754 (206)
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Most terrestrial plant species form symbioses with arbuscular mycorrhizal fungi (AMF). However, the below‐ground carbon (C) allocation of plants and the nutritional and growth benefits provided by AMF within this symbiosis vary greatly across species and environments ...
Hengjun Zhao +3 more
wiley +1 more source
, 2017 区域地壳稳定性评价在我国主要作为工程建设的决策和规划的重要参考。这一方法是在我国的大型工程的建设活动中得到了广泛地应用,其应用范围包括大坝、核电站的决策和选址以及城市规划、铁路、隧道等工程的建设等。近年来,随着工程活动规模的扩大,对区域地壳稳定性评价也提出了新的要求:一是需要更加贴近工程实践,实现由场地评价向地质工程设计的转变;二是需要将评价区域由传统的陆地区域扩展到海域。本文即是一次进行海域工程区域地壳稳定性评价的尝试,利用所采集到的渤海海峡及邻区最新的GPS 数据、重磁场数据 ...
刘忠亚 赵铁虎 彭轩明, 赵铁虎
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Methods in Ecology and Evolution, EarlyView.Abstract Molecular identification of insect food webs can accurately reveal complex trophic interactions and serve as a foundation for understanding ecosystem functioning and advancing biodiversity conservation. This process typically involves DNA library construction, high‐throughput sequencing and subsequent steps, including data assembly, annotation,
Xiao‐man Zhang +9 more
wiley +1 more source
Study on the Thermostability and Modification of Cathode Materials for Lithium-ion Batteries [PDF]
, 2015 锂离子电池以其工作电压高、能量密度高、无记忆效应及环境友好等优点受到科研界和产业界的瞩目，也被认为是最有希望的电动汽车动力电池体系。然而，锂离子电池热失控引发的火灾爆炸事故屡见报道，安全性问题已成为阻碍锂离子电池在储能、动力电源产业大规模商业化应用的主要原因之一。导致锂离子电池热失控的因素有很多，但正极材料相关的热分解对电池产热的贡献最大，因此对正极材料热稳定性的研究是十分有必要的，它有助于我们理解材料分解的过程，并在此基础上对材料进行改性，获得热稳定更好的正极材料，从而提高电池的安全性 ...
余洋洋
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Conservation Biology, EarlyView.Abstract Constructed value of information (CVoI) is an expert elicitation decision‐analytic tool used to prioritize sources of uncertainty based on their potential to improve decision outcomes if resolved. Despite increased application of CVoI, the robustness of CVoI prioritization of sources of uncertainty relative to differences in expert elicitation
Kristin P. Davis +7 more
wiley +1 more source
Biodiversity‐driven spatial conservation planning to delineate temporally stable regions
Conservation Biology, EarlyView.Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella +5 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2010 目的检测微卫星不稳定与卵巢癌的关系。方法收集卵巢癌患者及对照组的血液标本,提取循环血DNA,设计特异性引物,采用PCR-SSCP及测序分析的方法检测卵巢癌患者循环血中微卫星不稳定性与卵巢癌易感性的关系,分析微卫星不稳定性与卵巢癌患者的病理类型、临床病理分期等相关性。结果卵巢癌组中浆液性囊腺癌、粘液性囊腺癌、子宫内膜样癌、库肯勃瘤及其他类型发生微卫星不稳定的频率相比较差异具有显著性 ...
冷维春, 刘俊宝, 陈凤
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Shuitu Baochi Xuebao, 2021 以汉江与嘉陵江源区黄土母质上发育的土壤为研究对象，通过对土壤团聚体和理化性质的试验分析和数据解析，研究了两地土壤团聚体的分布规律及发生机制。结果表明：（1）汉江源区（LJH）团聚体的R0.25、MWD、GMD值由A层的83.73%，2.17和1.11分别降为C层的59.18%，0.40和0.26，嘉陵江源区（YJS）由A层的69.72%，1.03和0.46降为C层的56.55%，0.52和0.27，分形维数（D）则随土层深度的加深而增大，即前者的D值由A层的2.46增为C层的2.53，后者由A层的2 ...
刘艳玲 +5 more
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The Preparation of Diffusion Barrier Layer and Investigation of the Thermal Stability in Cu Interconnect Technology [PDF]
, 2016 随着集成电路的集成度越来越高，第一代Al互连材料由于较差的抗电迁移能力，已不能满足高性能互连材料的要求。Cu比Al具有更低的电阻率、更好的抗电迁移能力，因此，Cu取代Al成为新一代互连材料。然而，Cu互连线在较低温度下会与半导体Si元器件发生互扩散而生成Cu-Si化合物，导致电阻急剧上升，这会严重影响Cu互连线的稳定性与可靠性。为了提高Cu互连线的热稳定性，本研究选择熔点较高且在Cu中溶解度较低的金属V和Ta作为阻挡层材料；同时，通过在Cu中掺杂电阻率较低的Al元素制备得到Cu-Al合金薄膜 ...
戴拖
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