Results 111 to 120 of about 16,705 (195)
Gaoya dianqi, 1993 利用喷口电弧的微分—积分模型对N2气流中电弧的动态特性和稳态特性进行了计算,并与SF6电弧的特性进行了对比分析。从理论上对这两种介质中电弧熄灭的机理和差异进行了讨论。
张交锁, 王其平
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
Application of Lead Differential Control in Coordinated Hydro and Wind Power Generation [PDF]
, 2015 Chen, Qiyu +4 more
core +1 more source
Hydraulic System Dynamic Simulation Based on Bond Graphs Modelling [PDF]
, 2008 介绍了功率键合图的基本概念,并以自主研制的全自动液压控制冻盘成型机的液压系统为例,讨论了键合图的建立及状态方程的建立,并结合MATLAB强大的数字仿真功能对液压系统动态响应进行了数字仿真。充分体现了功率键合图在动态系统特征分析中的特点和优势。The fundamental concept of power bond graphs was introduced,and taking the hydraulic system of self established automatic hydraulic ...
刘亭利, 胡国清
core
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Exploring heat tolerance and acclimation capacity can provide an effective approach to evaluating species’ sensitivity to extremely high temperatures due to climate warming. Despite some work on amphibian and reptile thermophysiological adaptation, related questions remain. We reviewed the literature to provide a synthesis of worldwide data on
Zijian Sun +8 more
wiley +1 more source
Gaoya dianqi, 2019 随着电网系统的快速发展,大容量、高电压电力变压器不断增多,其振动与噪声对设备自身及周边居民的健康造成的影响日益凸显,因此变压器振动与噪声及其控制受到了国内外学者的广泛关注。文中从变压器振动噪声机理、特性、影响因素以及控制措施等方面对国内外研究进展进行综述。分析了硅钢片的磁致伸缩特性及Maxwell应力特性,得出铁心振动噪声的主要来源及数学模型;根据绕组磁场分布及受力分布,分析了绕组轴向及幅向振动特性及数学模型;总结了冷却设备等部件的振动特性。从振动产生、传递到噪声辐射等过程分析了变压器传播特性。从激励 ...
汲胜昌, 师愉航, 张凡, 陆伟锋
doaj
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Wildlife tourist attractions (WTAs) can permit interactions between humans and wildlife that are detrimental to the animals’ welfare and species conservation. Social media portraying human–wildlife interactions could affect people's perceptions of their acceptability and desirability or stimulate demand for detrimental practices.
T. P. Moorhouse, A. Elwin, N. C. D'Cruze
wiley +1 more source
Gaoya dianqi, 2019 运行中的变压器会产生持续振动,通过振动的变化可以判断变压器内部运行状态。变压器振动信号中包含了大量状态信息,难以从中提取有效特征来监测绕组松动状态。为此,提出了基于混沌理论和核可能性聚类算法KPCM的变压器绕组松动状态监测方法。首先,从振动信号的混沌动力学特性出发,通过选择最佳嵌入维数和时间延迟,对实测变压器振动信号进行相空间重构。然后,针对重构信号的高维空间分布,使用KPCM聚类方法对分布模式进行识别,据此对绕组松动状态进行监测。现场实测数据的计算结果表明 ...
黄春梅 +4 more
doaj
, 2002 针对原油蒸馏装置常压塔航煤比重模型具有动态特性的特点, 提出采用双隐层动态递归神经网络(DRNN ) 实现比重的软测 量, 推导了双隐层DRNN 的权值学习算法, 并利用在线比重分析仪构成了航煤比重软测量模型的在线校正。在某炼油厂常压塔装 置实际投用表明, 基于双隐层DRNN ...
曾文华
core
Mitigating light pollution impacts on arthropods based on light‐emitting diode properties
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Light pollution from artificial light at night (ALAN) is a significant environmental problem with far‐reaching consequences for ecological systems. Recent innovations in light‐emitting diode (LED) technology may offer sustainable outdoor lighting solutions, but scientific evidence is lacking. We investigated the effects of various LED lighting
Nicola van Koppenhagen +3 more
wiley +1 more source