Results 11 to 20 of about 1,729 (130)
Conservation Biology, EarlyView.Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva +9 more
wiley +1 more source
Hobbyist preferences for pet freshwater turtles
Conservation Biology, EarlyView.Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao +7 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
International Journal of Applied Linguistics, EarlyView.ABSTRACT Online tutoring platforms (OTPs) are an increasingly popular way for learners to study languages and for teachers to earn money. On many OTPs, individual teachers are responsible for attracting potential students via self‐branding. While scholarship has examined OTP teachers’ self‐branding practices and identified some of the most popular self‐
Wenjing Zeng, Nate Ming Curran
wiley +1 more source
Boundedness of certain integral operators with rough kernels [PDF]
, 2015 本学位论文研究沿低维集的粗糙核~Marcinkiewicz~积分算子、多参数奇异积分算子以及多线性奇异积分算子及其交换子的有界性.全文共分七章： 第一章概述本文所研究问题的背景以及国内外研究现状,并简单介绍 本文的主要结果与结构安排. 第二章讨论当积分核满足$\Omega\in\mathcal{F}_{\beta}(S^{n-1})\,(n\geq2)$时,沿多项式复合子流形的抛物型Marcinkiewicz积分算子的$L^p$有 界性,这些结果本质上改进和推广了一些已有的结果 ...
张代清
core
Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, EarlyView.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
Gaoya dianqi, 2001 介绍了非线性负荷的种类及其用电特性 ;分析了非线性负荷对电力系统及电器设备的危害 ;提出了分析非线性负荷时所采取的数学模型 ,论述了在解决实际问题时非线性负荷的处理方式。
薛军, 汪鸿, 华峰, 刘军成
doaj
Hermite Reproducing Kernel Meshfree Formulations for Geometrically Nonlinear Analysis of Thin Arches and Shells [PDF]
, 2015 薄拱壳结构作为一种常见的结构形式，其抗弯刚度一般远小于面内抗拉刚度，在载荷作用下容易出现几何非线性变形，因此研究该类结构的几何非线性计算方法有重要的理论研究和工程应用价值。但是，由于薄拱壳结构的平衡方程是高阶微分方程，即使采用伽辽金类型的数值算法也需要至少C1连续的形函数才能保证方法的一致稳定性和收敛性。对于有限元法而言，在任意网格上建立C1连续的形函数仍然是一个需要深入研究的问题。另一方面，基于节点构建近似函数的无网格法能够简洁地建立任意高阶连续的形函数，在求解高阶薄拱壳问题方面有独到的优势 ...
宋超
core
Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT This study examines the paradoxical relationship between policy learning and capacity: governments need certain capacities to learn effectively, yet these same capacities often emerge from previous learning experiences. Through a comparative analysis of Hong Kong and Singapore's responses to SARS and COVID‐19, we demonstrate how policy ...
Shubham Sharma, Xun Wu, Gleb Papyshev
wiley +1 more source
全球能源互联网, 2019 光伏电站采用直流汇集方式能够解决采用交流汇集方式时的宽频域振荡问题和线路损耗大的问题，但是现有文献对直流升压汇集系统的故障特性特别是断线故障特性研究很少。针对基于IPOS结构的直流升压变换器单元的光伏直流升压汇集系统，提出了系统断线故障发展过程中，非故障线路上存在故障电流的特性。首先，分析了非故障线路上故障电流产生的机理；其次，按照故障点位置的不同，对故障电流引起的系统电压电流变化特性进行了分析，并推导了故障电流的计算表达式；再次，从继电保护的角度分析了故障电流对直流升压汇集系统的影响；最后 ...
宋晓梅 +5 more
doaj +1 more source