Results 31 to 40 of about 14,745 (118)
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT A thermomechanical strategy based on rolling‐annealing cyclic (RAC) was developed to regulate defect architecture and precipitation behavior in a (FeCoCrNi)94Al3Ti3 high‐entropy alloy. Intermediate annealing during rolling enables progressive grain refinement and introduces a high density of twins, stacking faults, and dislocations, forming a ...
Jiale Man +6 more
wiley +1 more source
野生动物学报, 2014 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
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Fe‐N‐C electrocatalysts are considered promising alternatives to platinum‐based catalysts for advancing the development of metal–air batteries. However, the simultaneous realization of scalable synthesis, hierarchical mass‐transfer pathways, and precise regulation of Fe‐N4 sites remains challenging. Different from conventional Fe‐N‐C synthesis,
Bingye Song +7 more
wiley +1 more source
Gaoya dianqi, 2016 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
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Solid oxide electrolysis cell (SOEC) technology is a promising route for efficient and clean green hydrogen production because of its high conversion efficiency and the use of precious‐metal‐free catalysts. However, developing oxygen electrodes that combine high electrochemical activity with robust long‐term operational stability remains ...
Yue Zhao +8 more
wiley +1 more source
四川大学学报. 自然科学版, 2010 针对空中交通拥挤日益严重的现象,提出一种基于累积优先级时隙分配算法的地面等待程序模型.该算法在计算航班优先级时综合考虑了航班的延误时间、延误损失费用和飞行距离三种因素,通过引入权重来调配三者的重要程度.时隙分配时,采用累积优先级较大者优先的方式.通过计算机进行仿真,仿真实验表明,本算法能得到有效正确的时隙分配方案,且与先来先服务算法、整数规划算法比较,航班总延误时间和总延误费用有较大的减少.
杨奕, 施海, 陈新岗
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Gaoya dianqi, 2022 针对配变及其高压侧避雷器损坏的问题，文中提出在配变高压侧前若干基杆塔加装不同放电电压值的并联间隙，以调节线路和设备绝缘水平的差异，保护配变设备。首先建立10 k V配电线路过电压仿真模型，分别以直击杆塔不造成相间放电、感应雷下三相均不放电和感应雷下不造成相间放电时3种典型情况下的最大过电压侵入波为电源，分析了不同并联间隙安装方式下配变入口处最大雷电过电压和过电流幅值。仿真研究表明直击雷造成的使线路不发生跳闸的最大侵入波一般不会引起避雷器故障 ...
杨鑫 +5 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT The separation of light olefins is a crucial process in the petrochemical industry, and developing advanced adsorbent materials is very significant. Aluminum (Al) cluster‐based heterometallic frameworks possess great application prospects but have rarely been investigated for separation applications.
Song‐Yan Sui +4 more
wiley +1 more source
野生动物学报, 2012 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
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Household food expenditure continues to be a key factor in ensuring the realization of the Human Right to Adequate Food. Particularly in Brazil, access to food can be limited by economic constraints in vulnerable families, especially among farming families, who have been more vulnerable to food insecurity in recent years in the country.
Lucas de Almeida Moura +3 more
wiley +1 more source