Results 21 to 30 of about 15,391 (174)
Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, EarlyView.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
wiley +1 more source
Factor Analysis of high frequent mispricing of CSI [PDF]
, 2016 研究股指期货的定价偏差对投资者进行期现套利和套期保值具有重要意义。本文采用经典的持有成本定价模型和考虑了交易成本、税金和股指期货交易保证金等因素下的无套利定价区间模型来计算沪深300股指期货主力合约5min定价偏差，并研究沪深300股指期货5min定价偏差的持续性特征以及期货市场持仓量、到期期限、期现货市场成交量、期现货市场高频跳跃价差和两市场的波动率这七个因素对沪深300股指期货定价偏差的影响。本文将现货市场和期货市场的高频价格跳跃引入股指期货定价偏差的影响研究 ...
乐梦琦
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Human‐driven landscape change, particularly urbanization, is reshaping pollinator communities, yet the functional traits that mediate species persistence remain poorly understood. Dietary specialization is commonly used to predict species vulnerability.
Yan Yang +5 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2021 目的探讨研究年龄相关性听力障碍发病情况及老年前期筛查的可行性。方法选取2017年4月至2020年4月间在新华医院崇明分院进行听力检测的300例受试者为研究对象,根据年龄分组:31-40岁组,60例;41-50岁组,132例;51-60岁组,70例;61-70岁组,27例;71-80岁组,8例;80岁以上组,3例,对受试者进行纯音听力测试,记录受试者听力正常、言语频率听阈正常但是高频音下降、言语频率纯音听阈情况。结果 31-40岁组听力听力受损率最低,为6.67%,随着受试者年龄增加,听力受损率逐渐增高 ...
周健
doaj
Pensando - Revista de Filosofia, 2016 Não parece haver, ao menos num primeiro olhar, qualquer ponto de convergência entre a literatura de Lampedusa e a filosofia de Kierkegaard. Contudo, com um pouco mais de investigação, tal percepção revela-se falsa. Ambos os autores situam-se no século XIX e, nesse sentido, há forte conexão entre ambos a partir de uma análise histórica, filosófica e ...
openaire +2 more sources
High Frequency Soft Magnetic Properties of [FeCoSiN/SiNx]n Multilayer Films and Their Applications in Solenoid Microinductor [PDF]
, 2016 随着电子信息技术的飞速发展，多种现代化电子元器件逐渐向集成化、高频化和微型化方向发展。然而，在磁性电子元器件向集成化和高频化发展的过程中还面临着一大困境——缺乏具有优异高频性能（包括低矫顽力、高磁导率、高铁磁共振频率和高电阻率）的软磁薄膜材料。电感器作为一种重要的无源磁性元器件，其性能与体积/面积密切相关。当缩小尺寸（微型化）后势必会导致其性能变差，无法满足器件的使用要求。要突破这一困境，就必须寻找在高频（包括GHz频段）下稳定工作且具有较高磁导率的薄膜材料，并将这种材料作为磁芯集成到微型电感中 ...
刘小龙
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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
Research and application on induction heating technology based on the technique of quasi-resonant [PDF]
, 2016 感应加热作为新兴学科，在近30年来得到了真正应用，顾名思义，感应加热是利用电磁感应的原理使被加热的对象内部产生涡流，然后利用涡流做功来达到加热的目的。由于感应加热具有加热效率高、速度快、可控性好并且容易实现机械化、自动化的优点，已在加热、铸造、焊接、热锻和表面热处理等行业得到广泛的应用。 本文首先介绍了感应加热技术在国内外的发展现状和未来发展趋势，紧接着介绍了电磁感应加热技术的基本原理和实现方式。详细分析了串、并联谐振逆变电路的优缺点，并对各种逆变器进行比较 ...
戴立业
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Conservation Biology, EarlyView.Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando +54 more
wiley +1 more source
A comparable corpus-based study on stylistic features in translated English tourism texts [PDF]
, 2017 2015-2016 > Academic research: refereed > Publication in refereed journalVersion of ...
Li, D, Tang, F
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