Results 21 to 30 of about 13,500 (118)
Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu +5 more
wiley +1 more source
Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source
钢材高温蠕变是钢材在高温和应力作用下的塑性应变。高温蠕变会导致钢柱变形增大,耐火极限降低。为了考察高温蠕变对冷弯薄壁型钢柱抗火性能的影响程度,建立了考虑高温蠕变的抗火分析有限元模型,通过试验结果对有限元模型进行验证。利用模型研究了在不同荷载比、轴向约束刚度比、升温速率和火灾场景下,高温蠕变对冷弯薄壁型钢柱抗火性能的影响。研究表明,在有限元模型中考虑蠕变因素后,对于钢柱抗火性能的预测更为准确,更符合真实情况;在中等升温速率的火灾场景中,荷载比为0 ...
杨竞杰, 王卫永
doaj
Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal
Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz +5 more
wiley +1 more source
开展高温后水冷Q690高强钢的材性试验研究,明确高温对Q690高强钢力学性能的影响规律。在考虑材料非线性和几何非线性的基础上,将高温后水冷Q690高强钢的材性引入数值分析模型,在ABAQUS有限元软件中实现考虑屈曲后性能的Q690高强钢板梁的火灾后剩余承载性能分析。研究结果表明:暴露温度700 ℃为Q690高强钢力学性能变化的分界点。随着暴露温度的升高,fy和fu都表现出先减小后增大的规律。暴露温度对Q690高强钢弹性模量的影响较小。当暴露温度为800 ℃和900 ℃时 ...
华建民 +5 more
doaj
Effects of restoration practices on biodiversity in temperate and boreal forests
Abstract Several restoration practices are used to mitigate and compensate for the negative effects of large‐scale forestry on biodiversity in temperate and boreal forests. A comprehensive synthesis of the benefits of these practices across taxa is missing. We conducted a systematic review and meta‐analysis on this topic.
Malin Tälle +2 more
wiley +1 more source
From Affect to Values: A Lexical Approach
ABSTRACT Introduction Personal values act as guiding principles in life and are thought to be connected to affective experiences; however, past research has primarily examined the direction from values to affect rather than the reverse. This study identified theoretical frameworks suggesting a causal pathway from affect to values and tested this ...
Xi Chen, Shengquan Ye
wiley +1 more source
Visible‐Light‐Excited Optical Thermometry in Ca3Sc2Si3O12: Er3+ via an Efficient Eu2+ Bridge
ABSTRACT Er3+ ions are promising for optical thermometry due to their thermally coupled levels. However, their parity‐forbidden transitions result in weak and narrowband absorption, which restricts excitation to infrared lasers (e.g., 808, 980, or 1550 nm). Moreover, the single emission center inherently limits temperature sensitivity. In this work, we
Yi Liu +6 more
wiley +1 more source
Enhanced Magnetocaloric Effect in Tb‐Co‐Ni Magnets via Chemical Pressure
ABSTRACT Magnetic refrigeration materials are significantly needed in versatile modern industries, including scientific research, aerospace, and health care, due to their potential applications in gas liquefaction and storage. Herein, a significantly enhanced magnetocaloric effect with a suitable operation temperature range of 53–114 K and a giant ...
Lei Xi +11 more
wiley +1 more source
ABSTRACT Because of superior transportability and high energy capacity, methanol is regarded as a potential hydrogen carrier. Photocatalytic methanol dehydrogenation offers a sustainable and cost‐effective method for releasing hydrogen. Conventional photocatalysts face challenging obstacles, including the low catalytic efficiency and rapid ...
Rundong Chen +9 more
wiley +1 more source

