Results 11 to 20 of about 847,212 (208)
Wildlife Letters, EarlyView.We used automated behavioral response systems (ABRs) to assess invasive wild pig (Sus scrofa) behavioral response to four auditory playbacks: humans, coyote vocalizations (Canis latrans), pigs in distress, and barred owl (Strix varia) calls. Wild pigs had a significant flight response to human playbacks, but 68% of pigs did not flee.
Justine L. Smith +2 more
wiley +1 more source
, 2003 湍流计算的多尺度模型把物理（空间）尺度分为大小尺度，大小尺度（LSS）运动微分积分方程组通过湍流应力项相耦合。利用该方程组计算了不可压槽道和平面混合层流动的三维时间演化，同时算出平均流速、最大和平均脉动速度。平均速度和平均脉动速度与NS计算结果一致，NS计算未能算出最大脉动速度。混合层最大脉动速度突增现象与流动转捩猝发现象相对应。LSS方程计算中，小尺度l_(2f)与大小涡分割尺度l_c之比约为1/2～1/4时，数值解很好收敛；l_(2f)/l_c = 1/5未能获得收敛解。解析分析证实 ...
高智
core +2 more sources
Wildlife Letters, EarlyView.We staged dyadic interaction trials between two kangaroo rat species threatened by habitat loss to test whether one species dominates in direct interactions in the field. We found that Stephens’ kangaroo rat (Dipodomys stephensi) residents and intruders were dominant over Dulzura kangaroo rat (Dipodomys simulans). These results suggest that D. simulans
Janine N. Straughan +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 针对云南山地种植措施不合理、水土资源流失严重的现状，进行了玉米间作蔬菜和草带等不同种植方式对坡耕地水土流失影响的研究。结果表明：8月份玉米间作马铃薯的径流量比玉米裸地单作减少37．4％；7月、8月份玉米间作白菜的土壤侵蚀量比玉米裸地单作分别减少46．7％和58．2％；7，8，9，10月份玉米间作混播草带（处理G）侵蚀量分别比玉米裸地单作显著减少68．9％，74．6％，84．5％和82．1％（P〈0．01）；玉米间作白菜、间作马铃薯、间作辣椒总侵蚀量分别比玉米裸地单作显著减少47．O％，43．8％和10 ...
安瞳昕 +4 more
doaj
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Flowers with deep corollas are frequently associated with nectar robbing, a behaviour that often reduces pollen transfer and seed production. Robbing scars, however, may further affect plant reproductive success through rainwater entry into corolla tubes.
Wu Sun +6 more
wiley +1 more source
Shuitu Baochi Xuebao, 2004 采用大容积土培盆栽方法，研究了籽粒苋与烟草间作对烟叶矿质营养元素含量的影响，结果表明：间作烟叶磷的含量比单作降低了21．25％，而氮、钾和硫分别比单作增加了20．23％，63．86％和13．71％，间作烟叶中钾的含量分别是氮、硫的3．16倍和4．66倍；间作烟叶除铜的含量与单作的差异不显著外，其它微量元素含量与单作的差异均达显著或极显著水平，间作烟叶钼和铁的含量较单作分别增加了49．29％和27．39％；间作烟叶的灰分含量也较单作高7．83％；间作烟叶中砷和铬的含量较单作分别降低了15．65％和12 ...
李廷轩 马国瑞
doaj
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Oxygen supply capacity (α) is a physiological trait hypothesized to shape the metabolic niche and biogeography of aquatic breathers, yet how natural selection targets α remains unclear.
Na Zhang +6 more
wiley +1 more source
, 2016 非线性时间序列分析是研究神经系统动力学的有效方法之一,特别是对脑电信号的信息提取,分析判别神经系统工作状态及有效控制有着重要作用,而确定最大李雅普诺夫指数被认为是甄别系统状态最有效的方法。本文对现存的几种从非线性时间序列确定最大李雅普诺夫指数的方法进行了综述,并对作者所发展的采用相空间重构技术确定最大李雅普诺夫指数的原理及方法进行了详细阐述,确定低维嵌入可以导致计算最大李雅普诺夫指数出现平台 ...
武作兵
core +2 more sources
四川大学学报. 自然科学版, 2005 作为古典KKM定理的推广,Park在他的工作中介绍了G-凸空间和G-KKM映像.最近,Ding介绍了没有任何凸性结构的有限连续拓扑空间(简称FC-空间)的概念,它包含了C-空间(或H-空间)、G-凸空间、L-凸空间等许多具有抽象凸性结构的拓扑空间作为特例,并证明了FC-空间中的KKM型定理.作为改进和推广,作者在FC-空间中讨论了KKM型定理的一些形式,并获得了FC-空间中Ky Fan型sup inf sup形式不等式和一类极大极小不等式.
李红梅
doaj
Journal of Analytical Psychology, EarlyView.Abstract Written as a letter to my 28‐year‐old self, this paper explores the development of my engagement with cultural complexes. On August 18, 2009, I finished a chapter applying cultural complexes to a history of China, complete with elaborate charts that seemed to confirm a process by which cultural complexes are formed, and how China’s then recent
Kevin Lu
wiley +1 more source