Results 1 to 10 of about 407,494 (154)

Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods

open access: yesConservation Biology, EarlyView.
Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes   +3 more
wiley   +1 more source

Designing Integrated Policies for the Twin Transition: Challenges and Tradeoffs

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT Democratic governance faces the intertwined imperatives of managing the transformative risks and opportunities of digitalization, particularly stemming from artificial intelligence (AI), while achieving environmental sustainability within planetary boundaries.
Martino Maggetti
wiley   +1 more source

Tracing change in the public perception of plants: insights from archives and social media in China

open access: yesPLANTS, PEOPLE, PLANET, Volume 8, Issue 5, Page 1853-1871, September 2026.
As urbanization accelerates, historic gardens serve as vital cultural treasures that offer spiritual and cultural support to the public. This study proposes an innovative approach that merges historical records from the Qing Dynasty with contemporary social media data to explore changes in public perceptions of these gardens.
Dong Xu   +4 more
wiley   +1 more source

Toward a New Generation of AI‐Enabled Wearable Sensors

open access: yesRare Metals, Volume 45, Issue 9, September 2026.
ABSTRACT Wearable sensors have emerged as important platforms for noninvasive, real‐time, and continuous monitoring of physiological information, with growing applications in personalized healthcare, human‐machine interfaces (HMIs), and robotic empowerment.
Tianqi Yang   +7 more
wiley   +1 more source

Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework

open access: yesConservation Biology, Volume 40, Issue 4, August 2026.
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift   +8 more
wiley   +1 more source

连续管在注入头多种夹持方式下的受力分析

open access: yesShiyou jixie, 2011
连续管作业机在现场作业时,连续管在传送过程中受到的压紧力会使管体形成一定的椭圆度,影响了连续管的工作性能。研究了连续管在双向夹持、3向夹持和4向夹持等3种夹持状态下的受力和变形,并应用Pro/Mechanica对连续管的应力大小及分布进行了分析,计算了连续管的变形量,指出采用4向夹持方式连续管产生的椭圆度仅为0.26%,最大应力为330.3 MPa,远小于其他2种夹持方式,因此连续管的性能可以得到更大程度地发挥。
施志辉, 刘航, 许立
doaj  

Flexible parental care in a songbird correlates with sex‐specific responses to seasonal phenology, mating opportunity and reproductive success

open access: yesJournal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.
This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng   +5 more
wiley   +1 more source

连续管烂鱼头打捞工具的研发与应用

open access: yesShiyou jixie, 2015
为了使连续管断裂落井后的打捞简单、快捷,在连续管落鱼打捞特性分析的基础上,研制了连续管烂鱼头专属捞筒和捞矛。捞筒参数与连续管外径配套,并一一对应,捞矛参数也与连续管直径配套,并可适应同一直径连续管不同壁厚的情况,捞筒和捞矛的抗拉极限都比连续管推荐抗拉极限高15%~20%。现场应用结果表明,研制的打捞工具特别适用于连续管作业的油井,打捞成功率高,有效提升了油田企业的打捞作业水平,提高了作业效率。
张荣军   +5 more
doaj  

Nitrogen–Doped Carbon Nanotube–Supported Ni3Se4–CeO2 Heterojunctions With Multi–Orbital Hybridization for Efficient Hydrogen Evolution Reaction

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun   +10 more
wiley   +1 more source

连续管现场快速修复技术

open access: yesShiyou jixie, 2014
连续管作业时会出现压扁、折弯和局部破损等问题,在现场需要安全快速切断连续管损坏部位,并实施管管对接焊修复工程。为此,研制了便携式和全位置连续管校直机、旋转锥套式胀圆器、管口开坡口机以及6个自由度对中机构等成套修复设备。在采油井口连续管作业现场,运用这些修复设备和试验制定的修复工艺,在很短时间内就可以高质量地修复损坏的连续管。修复后连续管接头的疲劳循环次数达到母材管的61%。应用连续管快速修复技术可大大提高连续管井下作业效率,保证作业的安全性。

doaj  

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