Results 101 to 110 of about 162,194 (223)
Gaoya dianqi, 2011 为准确模拟直流牵引供电系统暂态过程,笔者提出并建立了一种计及铁磁材料饱和特性的仿真模型。基于电磁暂态仿真软件PSCAD/EMTDC,建立包含计及铁磁饱和特性钢轨模型、24脉波整流机组模型在内的直流牵引供电系统仿真模型。通过比较仿真结果,该模型能更加准确模拟系统的暂态过程。
韩俊, 徐政
doaj
Effects of parachute science on local research capacity 降落伞科学对当地研究能力的影响
Conservation Biology, EarlyView.Abstract Strengthening research capacity is essential to address the global biodiversity crisis. Yet, parachute science often undermines this goal, and its prevalence, costs, and benefits are unclear. We analyzed 13,502 publications on primate research that we extracted from Scopus (1960–2022) to evaluate the effects of parachute science on local ...
Li Yang +11 more
wiley +1 more source
[[abstract]]本研究主要討論大學粉絲專頁中，訊息與情緒反應之間的關係，以及何種情緒容易刺激粉絲產生參與和 分享。根據S-O-R模型與粉絲專頁所提供的功能分類，提出一套模型，測試訊息、情緒和互動三者之間 的關係。本研究樣本取自全球粉絲數量最多的大學機構，抓取所有文章，以及對應的粉絲回應數量與內 容，共計13,006則訊息。最終揭示粉絲行為與訊息形式具備相互影響關係，而且粉絲人數越多的大學機 構，明顯會善用訊息情緒引發有效互動，提升粉絲對於內容的留言與分享行為，進而刺激更高的內容自 然觸及率 ...
陳玉鈴
core
A link between increased temperature and avian body condition in a logged tropical forest
Conservation Biology, EarlyView.Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi +7 more
wiley +1 more source
Dianci bileiqi, 2018 针对电力系统的重要组成部分输电网所易产生的雷击故障,在基于深入分析雷击故障性质与输电网可靠性指标的基础上,提出了一种输电网雷击后可靠性评估模型。该模型包括输电线元件故障率、修复率模型与状态模型,采用线路分段模拟法的输电线可靠性模型与基于概率统计原理的变电站可靠性模型。针对输电网络模型复杂度的不同,提出一种权重计算法。最后采用所提出的输电网雷击后可靠性评估模型对某地区高压输电网进行研究评估,验证了本模型的实用有效性,从而为未来输电网可靠性评估做出了铺垫。
轩刚毅, 姚艳霞
doaj
Informing spatial conservation prioritization with species’ traits
Conservation Biology, EarlyView.Abstract New Guinea, the most botanically diverse island on the planet, is the location for one of the boldest conservation initiatives. The Manokwari Declaration aims to achieve 70% conservation designation for the Bird's Head Peninsula. This is 40% higher than the 2022 Global Biodiversity Framework target.
Liam A. Trethowan +27 more
wiley +1 more source
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley +1 more source
Guangtongxin yanjiu, 2004 文章提出了一种仿真单模光纤数字传输系统的方法,在模型中分别对信号模型、光纤模型和器件模型逐一进行了分析,并分析了评价系统性能的误码率和眼图两个参数。
龙雷, 张驰, 周正利, 宋宁
doaj
Conservation Biology, EarlyView.Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li +8 more
wiley +1 more source