Results 21 to 30 of about 13,196 (119)
ABSTRACT Transition metal‐based amorphous/crystalline (a/c) heterostructured catalysts have garnered significant attention due to their exceptional activity, stability, and cost‐effectiveness. However, the precise synergistic regulation of interfacial composition and phase states remains challenging.
Haoran Li +3 more
wiley +1 more source
2012年1月13日~5月8日,采用瞬时扫描法、全事件取样法及目标取样法对昆明动物园4只圈养大象(3♀1♂)的昼间行为时间分配及活动节律进行了观察与分析。结果表明:圈养亚洲象在取食行为、运动行为、站立行为、休息行为、交往行为、情绪行为和其他行为中主要以取食和运动2类行为为主,除怀孕象运动(14%)少于取食(67%)外,其余都是运动行为时间分配大于取食行为时间分配,其他行为分配时间均不超过10%。在工作日和节假日雄象的运动行为和取食行为大致相似,而雌象表现为在工作日的运动行为多于节假日,取食行为则相反 ...
刘安荣 师 婧 周杰珑 杨 梅 柳元淑 肖伍原 何勇杰 黄 松
doaj
Abstract Urgency to save species from extinction has prompted increased investment in law enforcement in protected areas. To date, such law enforcement has largely focused on increasing costs and reducing opportunities for offending. However, these resource‐intensive approaches are not always effective and can contribute to conflict between people and ...
Freya A. V. St. John +3 more
wiley +1 more source
文中提出一种基于断路器线圈电流波形的分合闸时间估算方法,先通过设备交接试验或首次例试时测取分合闸时间及线圈电流波形的时间特征参数,然后在运行操作时带电检测分合闸线圈电流波形,再提取线圈电流波形的时间特征参数,最后利用断路器主触头动作时间与辅助开关转换时间的配合关系估算分合闸时间,其计算精度满足工程应用要求,可以在一定程度上代替停电例行试验。
李佐胜 +5 more
doaj
Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks
Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang +8 more
wiley +1 more source
白鹤属大型涉禽,仅分布于亚洲地区,其东亚种群数量为3 750只左右;由于环境变迁,种群数量越来越少,已被列为国家Ⅰ级重点保护动物。为阐明在沼泽湿地生态系统环境中白鹤春季的活动规律以及各种行为的时间分配,于2010年4月15日~5月13日,在吉林莫莫格国家级自然保护区对白鹤春季迁徙期行为进行了初步研究。白鹤的各种行为的时间分配依次为:觅食占64.34%、静栖占4.42%、警戒占13.92%、游走占4.57%、理羽占11.51%、其他(包括打斗、飞行、呜叫等情况)占2.56%。成体与亚成体白鹤 ...
王宇嘉, 范巍巍, 李晓民
doaj
为了探究同域分布的黑颈长尾雉(Syrmaticus humiae)和白鹇(Lophura nycthemera)冬季觅食时间分配及分化,2017年和2018年冬季在广西岑王老山国家级自然保护区布设了123台红外相机。结果:保护区内黑颈长尾雉和白鹇在冬季期觅食地存在重叠现象;在觅食时间分配上,黑颈长尾雉存在3个觅食高峰,分别在7:00—8:00、11:00—12:00和16:00—18:00,白鹇有2个觅食活动高峰,分别在10:00—11:00和14:00—15:00,白鹇的觅食高峰较黑颈长尾雉的往后推迟,
辛桂瑜 张廷瑞 陈金莲 严海连 刘玲 张嘉宏 李桂芬 贝永建
doaj
Abstract In the era of the sixth mass extinction, reversing global biodiversity loss is of vital importance for life on Earth. In 2022, parties to the Convention on Biological Diversity (CBD) adopted the Kunming‐Montreal Global Biodiversity Framework (GBF), a strategic plan with 23 action‐oriented targets to be achieved by 2030.
Ina Lehmann +3 more
wiley +1 more source
为了解生态系统服务供需匹配、供需时空变化趋势及其影响因素。以山西省产水服务为切入点,基于1990年、2000年、2010年和2020年自然地理和社会统计数据,利用地理统计分析和InVEST模型,分析其供需时空变化特征。结果表明:(1)在产水服务供需时空格局方面,山西省产水服务供给与需求总量在30年呈增加趋势。山西东南地区(晋中市、长治市、晋城市)是主要的产水服务供给区;而产水服务需求较大的地区主要为太原、大同、长治和阳泉市区。(2)在产水服务供需匹配方面,1990 ...
赵奕博, 于洋, 孙保平
doaj
Background: The antibacterial efficacy of chlorhexidine shampoo is directly affected by formulation and bathing factors. Hypothesis/Objective: To evaluate the in vitro antibacterial efficacy of chlorhexidine‐containing shampoos at various dilutions and to compare their lathering ability.
Emily E. Binversie +2 more
wiley +1 more source

