Results 21 to 30 of about 1,095,363 (166)

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, Xiaoxue Dong, Xinwei Li, Lei Huang, Heng Huang, Changjia Li, Yanchuang Zhao, Chi Xu, Miaojun Ma, Zak Ratajczak, Changming Zhao   +10 more
wiley   +1 more source

泥石流地区铁路线路系统可靠性分析

Shuitu Baochi Xuebao, 1994
该文探讨了泥石流地区铁路线路系统可靠性评估方法，首先提出了线路系统可靠性的基本概念和度量指标，然后介绍了用计算机模拟方法计算可靠性的过程，最后讨论了马尔可夫模型在系统可靠性状态预测中的应用。
姚令侃 张敬蓉
doaj   +2 more sources

Structured machine learning modeling to support conservation of deep‐sea benthic biodiversity

Conservation Biology, EarlyView.
Abstract Biodiversity monitoring programs need to deliver accurate, timely, and actionable predictions. To establish a predictive monitoring program for deep‐sea benthos of the Santos Basin, Brazil, we developed a two‐stage structured model that allowed comparison of biodiversity predictions obtained from environmental simulations (2M‐Sim).
Gustavo Fonseca, Danilo C. Vieira, Juliane C. Carneiro, Renato S. Carreira, Milena Ceccopieri, Thais N. Corbisier, Adriana Galindo Dalto, Alberto G. Figueiredo Jr., Fabiane Gallucci, Paula Gheller, Simone Brito de Jesus, Helena Passeri Lavrado, Letícia Lazzari, Eduardo Hilzendeger Marcon, Daniel Leite Moreira, Rafael Bendayan de Moura, Ellen Pape, Ana Cláudia Aoki Santarosa, João Regis dos Santos Filho, Silvia Helena de Mello e Sousa, Thaisa Marques Vicente, Luciana Erika Yaginuma, Cinthia Yamashita, Wandrey Watanabe   +23 more
wiley   +1 more source

基于 NLC 调制的 MMC 多子模块工况模拟测试电路及其控制方法 [PDF]

全球能源互联网, 2020
模块化多电平转换器（MMC）由大量子模块构成，子模块的可靠性对MMC系统的安全可靠运行有着重要影响。特定工况下的可靠性评估表现是子模块设计指标之一，搭建较完整的MMC系统对子模块进行可靠性测试和验证成本高且效率低，因此提出了一种针对多个MMC子模块的工况模拟测试电路及其相应的控制方法。通过设计负载电流控制策略以及增加辅助桥臂、反串子模块及其控制策略，可以使待测子模块的流入电流、电容电压以及开关序列与实际MMC系统中一致。该电路能够同时对多个子模块进行测试，极大地减小了测试电路对直流源电压的要求 ...
杨云霄, 马柯
doaj   +1 more source

Role of funders in embedding tests in conservation practice

Conservation Biology, EarlyView.
Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith, Nancy Ockendon, Nida Al‐Fulaij, Alessandro Badalotti, Rachel Beattie, James Byrne, Sophia Cooke, Tiago de Zoeten, Winifred F. Frick, Stephan M. Funk, Douglas Gibbs, Lauren Gupta, Tatiana Hendrix, Becky Holmes, Nicola Johnstone, James Kinghorn, Simon Mickleburgh, Florence Miller, Matthew Muir, Jacob R. Owens, Danni Parks, Victoria Reilly‐Pinion, Hannah Reid, Kevin Seely, Julien Semelin, Taylor Shaw, Ruth D. Swetnam, Lisa Wheeler, William J. Sutherland   +28 more
wiley   +1 more source

一二次融合柱上开关控制可靠性模型与优化设计

Gaoya dianqi, 2023
随着信息物理融合系统在电网中的应用，一次设备和二次设备的融合（简称“一二次融合”）已成为柱上开关的重要研究方向和发展趋势，其主要目的是提升开关设备的可靠性和智能化水平。鉴于此，文中重点研究了一二次融合柱上开关的控制可靠性模型并提出了优化设计方案。根据柱上开关一二次融合后的新特性，建立其信息物理融合模型、柱上开关控制可靠性的单参量评估模型，评估模型涵盖真空度、电参量信息、分合闸线圈电流和通信方式4个维度，通过历史数据统计与专家法相结合的方式对柱上开关控制可靠性进行综合评估 ...
王东芳, 陶飞达, 黄智鹏, 黄国权, 熊洽, 李钦豪   +5 more
doaj  

Integrating fossil data in ecological niche models to improve predictions of future habitat of Caribbean corals

Conservation Biology, EarlyView.
Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams, Fernando Machado‐Stredel, Rowan C. Martindale, Corinne E. Myers   +3 more
wiley   +1 more source

Does the Community Understand the Community Guidelines?

Policy &Internet, Volume 18, Issue 2, June 2026.
ABSTRACT Amid continued public controversy and political debate about online speech governments and civil society have pushed social media platforms to increase transparency around how they regulate speech, through community guidelines and content moderation systems, to support users to hold companies accountable for content removals.
Friederike Quint, Yannis Theocharis, Mia Nahrgang, Nils B. Weidmann, Margaret E. Roberts   +4 more
wiley   +1 more source

《电工产品可靠性》

Gaoya dianqi, 1992
可靠性技术是以概率论为理论基础、以数理统计为基本方法的一门新技术。它包括可靠性设计、可靠性制造、可靠性管理、可靠性试验以及失效分析等很多内容。 本书在绪论中对可靠性的基本概念作了简单的介绍,第一章至第六章分别阐述了可靠性数学基础,可靠性特征量、可靠性统计、可靠性试验 ...
吴
doaj  

Dual‐Phosphidation‐Engineered Ni/NiO Heterojunction Nanoflowers With Synergistic Surface PO43− Group and P Doping Sites for High‐Performance and Low Temperature (−40°C) Supercapacitors

Rare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Nickel oxide (NiO)‐based electrodes with high theoretical specific capacitance can effectively increase the energy density of supercapacitors—the key factor limiting their practical deployment. However, several issues still restrict the production of advanced NiO‐based electrodes.
Ya‐Min Feng, Ran Liu, Guang‐Lei Zhang, Hu‐Cheng Zhou, Hai‐Neng Bai, Xiao‐Di Du, Jun Li, Jian Li, Wei‐Feng Liu, Jin‐Ping Liu, Jun‐Ling Guo   +10 more
wiley   +1 more source