Results 21 to 30 of about 9,141 (119)
, 2006 连用控制理论的反馈校正原理到高频功放中,设计出移动通信直放站的功率放大器电路:根据校正方式的不同,引入不同的器件以保证功放性能稳定。同时提出一种结合预失真技术的改进型前馈功率放大器设计方案。福建省自然科学基金(A0510002 ...
孙洪飞, 洪晓锋
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Informing spatial conservation prioritization with species’ traits
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract New Guinea, the most botanically diverse island on the planet, is the location for one of the boldest conservation initiatives. The Manokwari Declaration aims to achieve 70% conservation designation for the Bird's Head Peninsula. This is 40% higher than the 2022 Global Biodiversity Framework target.
Liam A. Trethowan +27 more
wiley +1 more source
Gaoya dianqi, 2020 为了解决220 kV变压器箱沿螺栓异常发热问题,先分析红外跟踪数据并总结箱沿螺栓的发热特点,从理论上推导变压器漏磁在箱沿螺栓上产生的涡流损耗数学表达式,根据表达式得出螺栓发热的3个特点,然后根据分析结果,依次采用螺栓替换和加装短接铜排的方法进行处理,结果表明,该法实用性强,能有效消除变压器箱沿螺栓异常发热隐患。
张彦 +4 more
doaj
A Study of Abnormal Phenomena of Condensed Phase with Hydrogen (deuterium) Absorption in Nano-materials Electrodes [PDF]
, 2013 充氢（氘）凝聚相异常现象源自Fleischmann-Pons电解实验中无法解释的过热现象，随后这种异常现象研究吸引了很多研究者投身其中。虽然研究该现象至今已有20多年，但仍然未能有效验证其是否真实存在。主要原因是异常效应的重复性较差，容易受到实验方法，实验材料、触发条件、温度、充氢（氘）率等多种因素影响。长期以来，可控制备高纯度、高活性、结构均一的电极材料是困扰凝聚相异常现象重复性的主要因素之一。 本论文从材料制备出发，针对电极材料纯度、活性、重现性差的特点，首先探索了一种可大量制备高纯度、高活性 ...
董大伟
core
Integrative Conservation, Volume 5, Issue 1, Page 125-136, March 2026.We collated detections of the sun bear from new and previously published camera trap studies across its range. We then analysed these detections at two different spatial scales to assess the habitat associations and diel activity of this species. We found that the sun bear is tolerant to moderate habitat disturbances. ABSTRACT Degraded tropical forests,
Alexander Hendry +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Considering the multiple challenges faced by stealth coatings in complex service environments, the development of multifunctional integrated microwave absorbing materials (MAMs) that combine efficient electromagnetic (EM) attenuation with environmental tolerance has become an urgent need. In this work, coral‐like CoNi@Void@C microparticle (MP)
Jiale Wu +8 more
wiley +1 more source
Haiyang yu huzhao海洋中尺度涡是极为重要的海洋现象，其引起的海表温度异常可改变海气界面热通量，进一步影响海气边界层和自由大气，从而对局地和全球气候产生影响。因此，基于观测和再分析数据，利用时空滤波、动态合成等方法，研究了1993~2019年热带西北太平洋中尺度涡对海气界面热交换的调制作用。结果表明，反气旋涡(气旋涡)伴随的海表温度暖(冷)异常能导致海气温差加大(减小)，进而增强(减弱)蒸发，从而增加(减少)海洋向大气释放的热通量。同时，上述海气变量异常值由涡旋中心向外逐渐减小，变化规律类似指数型高斯函数分布 ...
李 徐辉, 翟 方国, 刘 奕宽
doaj +1 more source
Gaoya dianqi, 2023 为了探测复合绝缘子的内部界面缺陷，文中提出一种基于微波致热的检测方法。针对电力系统中的常用设备——复合绝缘子的典型缺陷，结合电磁波理论，分析了微波在不同介电常数材料中传播特性的差异。通过有限元仿真分析，获得了含酥朽缺陷复合绝缘子在交流电压下的发热特性，并对比了微波作用下酥朽老化绝缘子与正常复合绝缘子发热特性的差异。使用实际出现朽化缺陷的芯棒样品，测试了微波加热后表面温升的特性，分析了微波入射方向、处理时间、功率对发热的影响。仿真与试验结果验证了微波致热检测绝缘子内部缺陷的有效性 ...
刘辉 +5 more
doaj
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Spatial segregation in at‐sea distribution is frequently observed in seabirds and can have important implications for conservation and management. Globally, many albatross and petrel populations are declining due to bycatch in fisheries. In South Georgia, the decrease in wandering albatrosses (Diomedea exulans) differs among breeding sites ...
V. Warwick‐Evans +3 more
wiley +1 more source