Results 41 to 50 of about 1,026,823 (242)
Inferring alternative ecosystem states with field survey data
Methods in Ecology and Evolution, EarlyView.Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen +10 more
wiley +1 more source
Fushe yanjiu yu fushe gongyi xuebao有机-无机杂化材料通过有机与无机组分的协同作用克服了单一材料的性能局限，实现了材料的高性能化和多功能化，但在制备过程中仍存在组分混合不均、孔隙率下降及相容性差等难题。辐射诱导技术通过调控能量传递与反应路径，为解决这些问题提供了有效途径。本文综述了辐射诱导法制备有机-无机杂化材料的研究进展：直接法利用γ射线、电子束等辐射源激发活性粒子（自由基、离子），驱动化学键重组，实现常温常压下快速合成，如Ag/PVA（聚乙烯醇）杂化水凝胶的绿色制备及ZIF-8@ZnO异质结构的光催化性能提升 ...
郭 正纲 +8 more
doaj +1 more source
, 2007 人们常说的"科学革命",实际上指的是"基础科学革命";应用科学对于科学、应用科学革命对于科学革命像是个婢女,处于从属的、被掩盖的和被漠视的地位;这实际上为近现代科学革命与技术革命和产业革命的脱节,以及为基础科学的大部分成果很难或几乎不可能转化为生产力,埋下了隐患。近现代科学、技术发展的重要成就排列表明,历次应用科学革命之后实际上都发生过应用科学的革命性发展,因而导致历次技术革命的发端,只是由于"婢女"被漠视,才使人感到科学与技术、科学革命与技术革命之间的关系好像断了线。文章根据搜集到的大量历史事实 ...
阎康年
core
When and why to give shorebirds a head start
Conservation Biology, EarlyView.Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson +4 more
wiley +1 more source
基于
He jishu近年来，全球对核电站可持续性和灵活性的需求日益增加，微型反应堆具备体积小、灵活性高、安全性高、适应性强、维护需求低等不可替代的优势，能够为大型电网无法覆盖的地区供电，因而成为核能方向的研究热点。SiC基车载式气冷微堆（SiC-based Vehicular Micro Reactor，SVMR）专为偏远地区提供电力服务，其堆芯设计紧凑，具有燃料装载能力强及高燃耗深度的优势。然而，由于反射层具有较强的中子慢化能力，大量中子经慢化后返回活性区边缘，致使该区域中子通量升高，功率密度显著增大 ...
张 方园 +5 more
doaj +1 more source
The collective application of shorebird tracking data to conservation
Conservation Biology, EarlyView.Abstract Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence‐based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership
Autumn‐Lynn Harrison +71 more
wiley +1 more source
, 2020 11月14日，中国科学院心理研究所第五届心理学应用论坛”在深圳举办。论坛由心理所心理健康应用中心执行主任李旭培主持，邀请心理所应用发展部主任张莉、深圳市智能穿戴产业联合会会长朱舜华分别致辞。 论坛首先由心理所应用发展部主任张莉、心理所副研究员赵国朕、中科启元集团儿童发展中心主任王建分别做主题报告。张莉在报告中介绍了心理学的应用现状、心理所具有应用转化价值的重点研究成果，并阐述了其对心理学应用发展及创新边界的思考。赵国朕以《让心可见，让科技更有温度》为主题，对人因智能的概念进行了诠释 ...
应用发展部
core
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
He jishu熔盐堆是第四代核反应堆的候选堆型之一，对其关键运行参数进行精准预测，不仅可以揭示反应堆的运行状态，而且能够对异常工况提前预警，为操纵员提供决策支持和技术指导。为此，本文基于深度学习算法对熔盐堆关键参数开展预测研究，以期优化熔盐堆的运行状态监测效率并辅助决策过程。采用RELAP5-TMSR程序建立生成数据集的熔盐堆系统安全分析模型，基于自编码器（Autoencoder，AE）、长短时记忆网络（Long Short-Term Memory，LSTM）和门控循环单元（Gated Recurrent Unit ...
王 超群 +4 more
doaj +1 more source
Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source