Results 11 to 20 of about 2,381 (103)
Uncovering the Nanozostera japonica species complex suggests cryptic speciation and underestimated seagrass diversity
New Phytologist, Volume 247, Issue 5, Page 2086-2097, September 2025.Summary The importance of marine angiosperms, or seagrasses, as foundation species for marine coastal ecosystems is in marked contrast to their low species number of only 70 described taxa. Seagrass species tend to have very similar overall morphologies dictated by hydrodynamic forces of the ocean environment.Xiaomei Zhang, Lei Yu, Yu‐Long Li, Zhaxi Suonan, Teruhisa Komatsu, Guanglong Qiu, Shaochun Xu, Shidong Yue, Min Xu, Feng Wang, Yu Zhang, Kun‐Seop Lee, Jin‐Xian Liu, Yi Zhou, Thorsten B. H. Reusch +14 morewiley +1 more sourceTowards a global understanding of tree mortality
New Phytologist, Volume 245, Issue 6, Page 2377-2392, March 2025.Summary
Rates of tree mortality are increasing globally, with implications for forests and climate. Yet, how and why these trends vary globally remain unknown. Developing a comprehensive assessment of global tree mortality will require systematically integrating data from ground‐based long‐term forest monitoring with large‐scale remote sensing.International Tree Mortality Network, Cornelius Senf, Adriane Esquivel‐Muelbert, Thomas A. M. Pugh, William R. L. Anderegg, Kristina J. Anderson‐Teixeira, Gabriel Arellano, Mirela Beloiu Schwenke, Barbara J. Bentz, Hans Juergen Boehmer, Ben Bond‐Lamberty, Kauane Maiara Bordin, Francis Q. Brearley, Filippo Bussotti, Maxime Cailleret, J. Julio Camarero, Gherardo Chirici, Flavia R. C. Costa, Ricardo Dalagnol, Hendrik Davi, Stuart J. Davies, Sylvain Delzon, Bishnu Prasad Dhakal, Renato A. Ferreira de Lima, Marco Ferretti, Joseph B. Fontaine, Matteo Garbarino, André Luís de Gasper, Arthur Gessler, Gregory S. Gilbert, John L. Godlee, Francisco Maiato Pedro Gonçalves, Leen Govaere, Alvaro G. Gutiérrez, Ernesto Gómez Cardozo, William M. Hammond, Henrik Hartmann, Martina L. Hobi, Andrés Holz, Jürgen Homeier, Mark Joseph Hovenden, Cho‐ying Huang, Bruno Hérault, Toby Jackson, Tommaso Jucker, Alistair S. Jump, Samuli Junttila, Teja Kattenborn, Joice Klipel, Martyna M. Kotowska, Kamil Král, Nicola La Porta, Leonel Lopez‐Toledo, René López‐Camacho, Eduardo Eiji Maeda, Jesús Mallol Díaz, Emanuel H. Martin, Jordi Martínez‐Vilalta, Nate McDowell, Peter W. Moonlight, Akira S. Mori, Mohd Afzanizam Muda, Jan‐Peter Mund, Robert Muscarella, Moisés Méndez‐Toribio, Sandra C. Müller, Thomas A. Nagel, Stefan Neagu, Charles Andrew Nock, Moses Nsanyi Sainge, Michael J. O'Brien, Josep Peñuelas, George L. W. Perry, Oliver L. Phillips, Juan Manuel Posada, Ricardo Ribeiro Rodrigues, Anamaria Roman, Guillaume Xavier Rousseau, Nadine Katrin Ruehr, Paloma Ruiz‐Benito, Katinka X. Ruthrof, Christian Salas‐Eljatib, Tajna Sanders, Rodrigo Scarton Bergamin, Tobias Scharnweber, Mart‐Jan Schelhaas, Bernhard Schuldt, Selina Schwarz, Rupert Seidl, Ekaterina Shorohova, Ana Carolina Silva, Geert Sioen, Jarosław Socha, Krzysztof Stereńczak, Jonas Stillhard, Dejan B. Stojanović, Susanne Suvanto, Miroslav Svoboda, Martina Sánchez‐Pinillos, Andrew J. Tanentzap, Anthony R. Taylor, Fabiano Turini Farah, Giorgio Vacchiano, Alexander C. Vibrans, Alberto Vilagrosa, Emilio Vilanova, Lars T. Waser, Susan K. Wiser, Kailiang Yu, Miguel A. Zavala, Laio Zimermann Oliveira, Daniel Zuleta, Alvaro Boson de Castro‐Faria, Ernst van der Maaten, Marieke van der Maaten‐Theunissen +114 morewiley +1 more sourceEvaluating plant lineage losses and gains in temperate forest understories: a phylogenetic perspective on climate change and nitrogen deposition
New Phytologist, Volume 241, Issue 5, Page 2287-2299, March 2024.Summary Global change has accelerated local species extinctions and colonizations, often resulting in losses and gains of evolutionary lineages with unique features. Do these losses and gains occur randomly across the phylogeny? We quantified: temporal changes in plant phylogenetic diversity (PD); and the phylogenetic relatedness (PR) of lost and ...Josep Padullés Cubino, Jonathan Lenoir, Daijiang Li, Flavia A. Montaño‐Centellas, Javier Retana, Lander Baeten, Markus Bernhardt‐Römermann, Markéta Chudomelová, Déborah Closset, Guillaume Decocq, Pieter De Frenne, Martin Diekmann, Thomas Dirnböck, Tomasz Durak, Radim Hédl, Thilo Heinken, Bogdan Jaroszewicz, Martin Kopecký, Martin Macek, František Máliš, Tobias Naaf, Anna Orczewska, Petr Petřík, Remigiusz Pielech, Kamila Reczyńska, Wolfgang Schmidt, Tibor Standovár, Krzysztof Świerkosz, Balázs Teleki, Kris Verheyen, Ondřej Vild, Donald Waller, Monika Wulf, Milan Chytrý +33 morewiley +1 more source高压直流断路器吸能装置各柱中电流不均衡性的研究
Gaoya dianqi, 1994 高压直流断路器吸能装置中氧化锌阀片的并联柱数愈多、每柱中串联的氧化锌阀片的片数愈少,则电流不均衡分布的问题愈严重.计算表明,只要合理地进行搭配吸能装置各柱中的氧化锌阀片,电流的不均衡性可以减少到很低的水平.张节容, 翁晓光doaj 用于变压器整数阶谐频噪声的吸声超表面研究
Gaoya dianqi, 2022 利用共振型声学超表面吸声是近年来噪声控制的研究热点，然而其狭窄的吸收峰限制了进一步应用。针对电磁噪声在中低频噪声峰分布呈现倍数关系的特点，基于Visco-Thermal长直管吸声原理设计了六棱柱状的共面迷宫腔声学超表面单元结构，厚度仅为波长的1/137，可以用一种结构实现对多个噪声峰值的吸收。利用不同单元结构的并联，实现了对更多噪声峰值的覆盖。以变压器噪声为例，用并联的共面迷宫腔声学超表面结构实现对800 Hz以下所有整数阶谐频噪声的吸收，分析了结构参数对吸声效果的影响规律并进行了原理性实验验证。王广周, 韩豫, 王磊磊, 张嵩阳, 王东晖 +4 moredoaj ±800kV特高压直流换流站直流场多柱并联避雷器预防性试验研究
Dianci bileiqi, 2013 现行±800 kV特高压换流站避雷器预防性试验规程沿用了±500 kV常规直流避雷器的试验要求和基本方法,由于±800 kV特高压直流场避雷器采用了多柱并联的结构,而现行规程中对于这种并联结构避雷器预防性试验方法及结果判定并没有针对性的规定。本研究设计了3种试验方案,经过比较和模拟试验研究,最终选择整体试验方案作为多柱并联避雷器推荐预试方案,并提出基于整体试验方案的避雷器状态判定方法。采用此试验方法,在保证测试有效性的前提下,可减少预试工作量,并且在一定程度上减小了拆装过程对被试设备的损坏。张曦, 祝嘉喜, 程锦, 陈小军, 任伟, 陕华平, 许杨, 梁云丹, 左中秋 +8 moredoaj ±550 kV直流GIS多柱并联避雷器螺旋结构自生电感均流特性研究
Dianci bileiqi为解决±550 kV直流GIS避雷器多柱并联吸能时的电流分流不均难题，提出一种氧化锌电阻片螺旋排布结构的多柱并联避雷器。螺旋排布的氧化锌电阻片不仅能有效缩短避雷器长度，从而降低海上平台振动对直流GIS避雷器的应力冲击；同时螺旋结构电阻片自生电感可以在多柱并联吸能时降低各柱电流分布的不均匀性。本研究首先设计了±550 kV直流GIS多柱并联避雷器螺旋结构参数，并建立避雷器多物理场仿真模型，计算了氧化锌电阻片螺旋排布结构下的自生电感。进一步研究了自生电感对多柱并联避雷器吸收能量时电流分布的影响规律 ...刘思远, 王柳丹, 陈金超, 陈奕帆 +3 moredoaj ±800kV特高压直流换流站EM避雷器工况分析及其关键技术的研究
Dianci bileiqi, 2018 金属回线避雷器（metallic return arrester,简称EM避雷器）是±800kV特高压直流换流站的关键过电压保护设备之一。在介绍了特高压直流输电系统单极金属回线运行方式的基础上,详细分析了EM避雷器的稳态应力和暂态应力,特别是最高端Y/Y换流阀侧出线发生单相接地故障时的过电压机理。深入研究两项关键技术:1)低幅值、多脉冲的冲击电流下金属氧化物电阻片的能量吸收能力及筛选方法;2)多柱并联电阻片柱分流技术 ...胡淑慧, 赵冬一, 赵峥, 黄勇, 张永耀, 厍海波 +5 moredoaj 半主动式钻柱升沉补偿系统补偿机理分析
Shiyou jixie, 2012 运用达朗伯原理，结合钻柱的运动规律，分别建立了并联和串联2种形式的半主动式钻柱升沉补偿装置力学模型，分析比较这2种半主动式升沉补偿装置的补偿机理。结果表明，在半主动式升沉补偿系统中，被动补偿部分所起的作用是支撑钻柱的大部分质量，主动补偿部分只是用来补偿各种力的变化量；由于并联式结构比串联式结构的执行原件多，所以其液压系统相对复杂，但当船体生成位移较大和深海钻进所需的补偿负载较大时，并联式结构又优于串联式结构；在正常钻进工况下，当控制目标为控制井底钻压不变时 ...张萌, 胡小东, 李波doaj 温度对多柱式氧化锌避雷器装置的影响
Dianci bileiqi, 1995 温度对多柱式氧化锌避雷器装置的影响单柱式避雷器一般直径的阀片难以承受５００ｋＶ或８００ｋＶ输电线路操作冲击能量，需双柱以上并联。而各柱阀片的性能总有差异，这样，在长期加电压或避雷器释放操作波负荷时各柱承受负荷有差异，特别是多柱并联时。美国电力研究所进...doaj
