Results 51 to 60 of about 23,312 (161)
Advancing conservation breeding programs for marine invertebrates
Conservation Biology, EarlyView.Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam +3 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 1999 实验发现稀土铽离子能与3,4-二羟苯丙氨酸发生络合反应,并发射出铽离子的特征荧光.本文对铽离子与3,4-二羟苯丙氨酸的络合发光反应进行了详细研究,由此提出了一种简便、快速、灵敏检测3,4-二羟苯丙氨酸的新方法,并且试验了其它氨基酸对其测定的干扰情况,表明该法具有较好的选择性.在激发波长为300nm,发射波长为490nm与550nm处测定其荧光强度，3,4-二羟苯丙氨酸浓度在2.0×10-8～5.0×10-5mol/L范围内与体系的荧光强度具有良好的线性关系,相关系数为0.9992,其检出限为6.0×10-
ShenXueyou(沈学优) +3 more
doaj +1 more source
Taxonomic and functional diversity of urban bees of the world
Conservation Biology, EarlyView.Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso +10 more
wiley +1 more source
全球能源互联网以可再生能源和储能为主体的新型能源系统建设已成为能源转型的发展趋势。针对当前电化学储能面临技术经济性差以及供用能在品质上存在不匹配的问题，基于能量梯级综合利用的理念和共享经济的模式，提出热电联产型共享储能系统的技术与业态，探讨该类储能的基本运行原理、技术经济特性和商业模式。以高温固体蓄热、余热锅炉与汽轮机组成的典型热电联产型共享储能系统的案例分析表明，以固体蓄热为储能设备的热电联产型共享储能系统，在现有市场环境下实现系统经济性最优的容量配置和运行调度时，系统内部收益率达到10.6%、投资回收期为8.2 ...
冶兆年 +4 more
doaj +1 more source
Insights for conservation from the Ecological Knowledge Games project
Conservation Biology, EarlyView.Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan +4 more
wiley +1 more source
全球能源互联网宽频振荡紧急控制是保障风电系统安全运行的“兜底”措施之一。由于风电系统非线性强度大及运行工况多变，难以建立宽频振荡在线风险评估的解析模型。为此，提出了基于数据驱动的宽频振荡风险在线评估方法及紧急控制策略。首先，设计了能够应对宽频振荡多模态和时变特征的宽频相量检测算法，为后续宽频振荡特征评估提供数据支撑；其次，利用最大李雅普诺夫指数作为宽频振荡动态演化趋势的量化指标，并根据风电机组模态阻抗的负电阻效应在线辨识宽频振荡源；然后，融合宽频振荡特征辨识结果，提出宽频振荡风险在线评估策略 ...
柳劲松, 马宁宁, 刘舒
doaj +1 more source
基于强化自组织映射和径向基神经网络的短期负荷预测 [PDF]
全球能源互联网, 2019 径向基（radial basis function，RBF）神经网络因其泛化能力强、收敛速度快的特点广泛应用于负荷预测。但传统采用K-means和自组织映射（self-organizing map，SOM）训练RBF径向基中心的方法因其全局搜索能力偏弱，仍然存在容易陷入局部最优解的问题，严重制约了RBF预测精度的提高。针对此问题，提出了一种基于强化学习（reinforcement learning，RL）改进的RBF短期负荷预测方法。强化学习通过环境的反馈不断完善搜索策略，具有非常突出的全局搜索能力 ...
黄乾, 马开刚, 韦善阳, 黎静华
doaj +1 more source
Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, EarlyView.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, EarlyView.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
Plan research on research-based university and its peripheral locality(研究型大学与周边地区协调发展的规划研究)
Zhejiang Daxue xuebao. Lixue ban, 2006 研究型大学是以科研为中心的大学，通过对浙江大学的案例研究，分析它对周边地区社会、经济、文化和生态等各个方面的影响，进而探索研究型大学对所在城市空间生长的促进作用，并在此基础上提出了研究型大学周边地区的规划要点.
YANGJian-jun(杨建军) +2 more
doaj +1 more source