Results 31 to 40 of about 1,605,470 (149)
Vulnerability of tropical fish communities across depth in the central Indian Ocean
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Coral reefs and their fish communities below scuba diving depth (>30 m), in mesophotic coral ecosystems (MCEs) (∼30–150 m), in rariphotic (150–300 m), and in upper bathyal waters (300–500 m) are often underexplored, especially in the Indian Ocean.
Paris V. Stefanoudis +12 more
wiley +1 more source
Gaoya dianqi, 2008 电流互感器的可靠性影响到整个电网的安全运行,而电流互感器运行的可靠性,在很大程度上取决于其绝缘的可靠性,局部放电试验是检测电流互感器绝缘状况的重要手段。笔者详细分析了电流互感器局部放电的检测方法-脉冲电流法,以及局部放电检测的试验回路。针对局部放电检测易受干扰的情况,实测了现场各种干扰信号的图谱,通过对干扰图谱特点的分析,判别出干扰信号的来源,并采取相应的措施抑制干扰。
孙江平 +4 more
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Gaoya dianqi, 2020 外部环境干扰是造成特高频在线监测系统发出虚警和漏警等错误报警信息的主要原因,制约着特高频局放检测技术的发展。针对目前特高频局部放电带电检测过程中外部放电干扰信号识别难度大、识别手段复杂等问题,文中提出了基于自动时差分析的时域抗干扰技术。利用检测传感器及背景传感器检测到的信号的时间差,通过参数设置和逻辑判断,分析其是否为干扰信号并进行滤除。在126 kV GIS试品模型上进行了验证试验,结果表明,该方法可以有效地自动滤除外部放电干扰信号,解决了特高频局放检测中抗干扰这一核心难题 ...
冯新岩 +4 more
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Integrative Conservation, Volume 3, Issue 4, Page 368-381, December 2024.Lack of species information complicates understanding climate change vulnerability, but life history traits can be proxies for missing information. In the north‐central United States, useful traits for discriminating vulnerability of amphibians include range size, clutch size, diel activity patterns, and habitat breadth.
Ross K. Hinderer +2 more
wiley +1 more source
Gaoya dianqi, 2014 为了从窄带干扰背景中有效提取局部放电信号,提出一种抑制周期性窄带干扰的共振稀疏分解方法。利用窄带干扰信号与局部放电信号品质因子的不同,在基于信号共振稀疏分解理论的基础上,实现窄带干扰和放电脉冲的有效分离。该方法能在有效抑制窄带干扰的同时,削弱随机干扰。仿真和实测信号的处理结果验证了该方法的可行性和有效性。
张宇辉, 段伟润, 李天云
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The enigmatic life history of the bamboo explained as a strategy to arrest succession
Ecological Monographs, Volume 94, Issue 4, November 2024.Abstract Bamboos are perennial woody grasses that display an enigmatic mix of traits. Bamboo is highly shade intolerant like early‐successional trees. Without secondary xylem, bamboos cannot continue to grow once they reach a maximum height or replace xylem damaged by hydraulic stress and must instead replace each stem after a few years using ...
Aiyu Zheng, Stephen W. Pacala
wiley +1 more source
Guangtongxin yanjiu, 2019 非正交多址接入（NOMA）是5G无线网络的基本支持技术,可满足大规模连接和高吞吐量的异构需求,能增加可接入的用户数。NOMA的关键思想是同一资源块为多个用户提供服务,系统可容纳的用户数增加,但对系统容量的提升有限,针对此问题,文章提出在NOMA的基础上,将其与大规模多输入多输出（MIMO）天线结合,提高系统的容量,同时将下行多用户按照信道差异进行用户匹配,两两分为一簇,簇与簇之间的干扰采用块对角化（BD）算法进行消除,簇内用户之间的干扰采用串行干扰进行消除。仿真结果表明 ...
王金伏 +4 more
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Effective conservation of subterranean‐roosting bats
Conservation Biology, Volume 38, Issue 1, February 2024.Abstract Bats frequently inhabit caves and other subterranean habitats and play a critical role in subterranean food webs. With escalating threats to subterranean ecosystems, identifying the most effective measures to protect subterranean‐roosting bats is critical.
Melissa B. Meierhofer +11 more
wiley +1 more source
, 2001 首先对气动塞式喷管内外流干扰的机理进行了分析，在此基础上对外流干扰对气动塞式喷管性能的影响进行了数值模拟研究。数值方法采用NND格式求解二维N-S方程，对于不同的背压和来流马赫数条件进行了大量的数值实验 ...
马家欢, 郭唐稳, 李江
core +1 more source
Guangtongxin yanjiu, 2017 PON（无源光网络）中突发式长发光干扰是异常上行光信号干扰的一种,由于其故障发生的随机性以及持续时间的瞬间性,使得故障难以定位。文章针对PON ONU（光网络单元）突发干扰问题,描述了突发长发光的几种表现与可能原因,总结了典型的防护方法,并对比了几种方法的优缺点;对定位故障ONU的方法进行了探讨,给出了彻底消除故障的方法。
余辰东
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