Results 11 to 20 of about 2,653 (106)
Factors that shape large‐scale gradients in clonality
Abstract Aim Many plant species reproduce clonally. However, ecologists still have much to learn about the factors that shape large‐scale patterns in plant clonal growth and reproduction, especially in the southern hemisphere. We addressed this knowledge gap by quantifying relationships between reproductive mode and a suite of plant characteristics and
Hongxiang Zhang +4 more
wiley +1 more source
Key Largo woodrats are a small and endangered island species, whose individuals tend to occur in family groups. Isolation from mainland populations, predation, and habitat fragmentation have caused genetic drift, leading to low overall diversity. Here, we found that a major category 4 hurricane promoted genetic diversity in the Key Largo woodrat ...
Taylor Ackley +5 more
wiley +1 more source
Brief summary: Sri Lanka's biodiversity is threatened by habitat loss, climate change, and ineffective traditional conservation methods. Integrating plant tissue culture and DNA barcoding offers scalable, precise tools for conserving rare and endemic species.
Mylange Dona Kasundi Mekhala Gunasena +2 more
wiley +1 more source
Religious uses shape the selection and distribution of Chinese Buddhist tree species
Abstract As a widely disseminated world religion, Buddhism's selection of religious species may profoundly impact candidate species distribution. This study sampled 246 Chinese temples covering diverse regions to investigate the selection modes of Buddhist tree species (BTS) and the alien religion's influence on Chinese indigenous biodiversity and ...
Cheng Jin +8 more
wiley +1 more source
Servicesheds connect people to the landscapes upon which they depend
Abstract Ecosystem services (ES) are benefits people receive from nature. To sustain these benefits, we need to spatially connect communities benefitting from specific ES with landscape features that generate the ES. A variety of process‐based models support ES assessments by estimating the biophysical supply of ES that comes from landscapes.
Yiyi Zhang +7 more
wiley +1 more source
Measuring policy analytical capacity in renewable energy policy: Germany‐Japan‐US comparison
Abstract Policy makers in the modern age must confront complex and expanding knowledge on a daily basis. It has been put forth that policy making requires increasingly higher levels of policy analytical capacity at the individual, organizational, and system levels.
Masahiro Sugiyama, Jun Muto
wiley +1 more source
六氟化硫(SF6)具有极佳的绝缘、灭弧特性,但其温室效应对全球环境造成的影响时刻督促着科研工作者们不断寻找其替代气体。行业内对C5F10O/CO2的绝缘以及灭弧能力均有所研究,但对其作为SF6潜在的替代气体与金属材料的相容性方面的报道较少。文中研究了不同故障点温度下C5F10O/CO2与高压电气设备内部常用的紫铜材料的相容性。试验对气体组分、表面形貌进行了表征、分析,发现C5F10O/CO2在接触80℃的紫铜的情况下便已开始分解且分解产物含量随故障点温度的升高而增大,同时紫铜表面颜色也逐渐加深 ...
曾炼 +4 more
doaj
SF6绝缘电流互感器是广泛应用的电力设备,其气体用量巨大,是SF6气体替代或减量应用的重要领域。为此,研究SF6/N2混合气体替代技术具有重要意义。文中提出了针对SF6电流互感器进行混合气体改造的技术方案,并开展了理论分析、关键部件研制、绝缘性能试验和实际挂网运行校验,同时对该改造技术的可行性进行了探索。研究表明,两种气体混合比例(20%SF6/80%N2与30%SF6/70%N2)的电流互感器均通过了工频耐压试验和雷电冲击耐压试验,SF6/N2混合气体替代技术现场可行。文中研究成果对于SF6 ...
吴经锋 +5 more
doaj
为了寻找SF6的替代气体,文中对极不均匀电场中的10%30%CF3I/CF4混合气体在不同极间距(535 mm)和不同气压(0.10.3 MPa)下的工频击穿特性进行了实验研究。结果发现,CF3I/CF4混合气体的工频击穿电压随着极间距的增大而近似线性增大,但是其随气压升高和CF3I体积分数的升高均表现出"驼峰"现象。与SF6相比,CF3I/CF4混合气体的工频耐压水平在它的59%120%之间。综合考虑,15%20%CF3I/CF4混合气体可以作为SF6替代气体在合适的电气设备中使用。
倪兆瑞, 张洲铭, 肖登明, 谭燕
doaj
SF6气体由于其优秀的绝缘和灭弧性能而被广泛应用于高压电力开关设备中。但是,SF6是一种强温室效应的气体,因此,研究以氟化腈(C4F7N)气体为代表的新型环保气体作为SF6的替代气体成为了目前高压电器领域的热点问题。文中针对126 kV隔离开关结构,建立了燃弧过程的磁流体动力学模型,采用SF6气体和C4F7N/CO2混合气体的真实气体模型,对比研究了SF6和C4F7N/CO2混合气体在不同充气压力和触头运动速度下的燃弧过程。建立了弧后电击穿的评估方法,针对C4F7N ...
傅明利 +5 more
doaj

