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Functional Ecology, Volume 39, Issue 4, Page 1096-1111, April 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Many invasive plant species have demonstrated a better ability to tolerate and accumulate heavy metals than their co‐occurring native plants. Given the potential biological toxicity of heavy metals to phytopathogens, we postulated that heavy metal contamination could ...
Tiantian Lin +7 more
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Threats posed by land use to water quality in South Africa's strategic water source areas
World Water Policy, Volume 11, Issue 1, Page 155-164, February 2025.Abstract Understanding the negative impacts of land use/land cover (LULC) on water quality is key to developing effective integrated catchment management strategies. However, in line with the Integrated Water Resources Management (IWRM) philosophy, this necessitates the generation and application of useful scientific knowledge, which stakeholders and ...
Kent Anson Locke, Kevin Winter
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Multiple‐stressor effects on leaf litter decomposition in freshwater ecosystems: A meta‐analysis
Functional Ecology, Volume 38, Issue 7, Page 1523-1536, July 2024.Read the free Plain Language Summary for this article on the Journal blog. Abstract Recent years have witnessed a surge in research on the effects of multiple stressors in freshwater ecosystems. While studies have increased, the synthesis of their findings into a broader understanding of ecosystem‐level effects remains an ongoing endeavour. Leaf litter
Graciela Medina Madariaga +6 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
Gaoya dianqi, 2017 及时全面掌握电网积污水平是预防电网污闪事故的基础,通过绝缘子积污预测获取污秽水平是适应电网智能化的发展方向,但目前绝缘子积污预测的理论基础不够完善,预测准确性欠缺。文中以上述问题为出发点,对绝缘子积污的外部影响因素进行了分析,对基于大气环境成分、基于气象参数预测绝缘子积污的方法及其准确度、适用性进行了总结。结果表明,大气环境成分、气象参数对绝缘子积污有显著影响;目前基于大气环境成分的绝缘子积污预测尚无法实现饱和污秽度的预测,基于气象参数的绝缘子积污预测尚不能满足工程要求;综合大气环境成分 ...
李特 +5 more
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Dianci bileiqi, 2023 为了提高高速列车运行安全稳定性，防止车顶绝缘子在雾霾天气下发生污闪，对污秽颗粒在绝缘子表面的沉积过程进行受力分析，根据受力分析结果对车顶绝缘子进行结构优化，提出两种空气动力结构绝缘子，并对优化结构进行流体力学仿真与风洞积污试验。结果表明：相比于传统结构绝缘子，空气动力结构绝缘子绕流速度大幅度提升，背风面流线有序不存在逆流现象，边界层分离点延后，旋涡运动大幅度减弱，气流分布状况得到了良好改善。空气动力型绝缘子的背风面积污量大幅减小，表面整体积污量小于传统结构绝缘子，积污更容易达到饱和，且污秽分布更加均匀。
陈然 +4 more
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Gaoya dianqi, 2017 为研究棒形悬式复合绝缘子的积污特性,利用COMSOL对其在笔者所在学校风洞条件下的积污特性进行了数值模拟,并将模拟结果与华北电力大学风洞试验结果进行了对比分析。结果表明:两者积污量数量级相同,整体上随直流电压的变化趋势一致且呈"V"形分布,验证了该模拟方法的合理性。藉此,对复合绝缘子自然积污特性进行了模拟研究,分析了污秽质量分数和电压类型对其自然积污特性的影响。结果表明:绝缘子表面积污量随污秽质量分数的增大而增大;污秽质量分数较小时,积污量的增加速度较大,质量分数较大时,反之。在相同条件下 ...
吕玉坤 +4 more
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Gaoya dianqi, 2014 绝缘子表面积污状况与污区划分及外绝缘的选择密切相关,是外绝缘的基础性工作之一。为此,文中选取10支深圳地区岭深线路交流500 k V复合绝缘子并对其积污特性展开研究。对测试结果进行方差分析发现,岭深线不同地形条件绝缘子整体积污状况接近,而同一支绝缘子不同部位表面积污状况存在差异,表现为:靠近绝缘子串两端的伞裙单元盐密值较大;绝缘子伞裙上表面积污重于下表面。上述测试结果表明复合绝缘子表面积污存在不均匀性,在进行复合绝缘子人工污秽试验时,应充分考虑复合绝缘子的积污特点。
徐康泰 +6 more
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Dianci bileiqi, 2015 为研究瓷双伞型绝缘子表面的积污特性,以瓷双伞XWP2-160型绝缘子为研究对象,利用Fluent软件中的欧拉模型,对该绝缘子的积污特性进行了数值模拟研究,并预设了6个观测点,对其进行了重点分析。研究表明:随风速、颗粒粒径及污秽浓度的增大,绝缘子表面积污量均有所增加且有一定的饱和性;迎风面观测点的积污量随粒径的增大而增大,但背风面,部分观测点的积污量随粒径的增大其增长速率减缓,甚至出现负增长;粒径较小时,积污量随风速的变化较大,而粒径较大时,则反之。
吕玉坤, 卫少科, 李聪
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Dianci bileiqi绝缘子表面污秽积聚会降低其绝缘性能，获得瓷绝缘子表面污秽积聚规律对输电线路的运行和维护具有重要意义。考虑污秽颗粒在绝缘子表面的碰撞反弹过程，建立了瓷绝缘子多物理场耦合积污模型，与碰撞即黏附模型进行对比，分析了不同因素对积污的影响，以研究污秽颗粒在绝缘子表面的沉积情况。结果表明，颗粒粒径、电压和相对湿度的增大有利于颗粒沉积，其中直流电压对积污的影响明显大于交流电压，直流正极性电压由5kV增大到55kV时，黏附粒子数增加了86%，而交流电压作用下增加了24%；黏附粒子数随风速的增大先增加后减小 ...
赵冲 +4 more
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