Results 31 to 40 of about 8,490 (166)

Band Edge Reorganization via Symmetry Constraints in Covalent Bonding Heterojunctions Boosts Photocatalytic Metronidazole Degradation

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT The covalent bonds at heterojunction interfaces enable more efficient charge carrier separation than traditional weakly coupled heterojunctions, with enhanced photocatalytic performance for organic wastewater purification. The interfacial covalent bonds drive energy band reorganization, rendering the conventional independent band edge ...
Jing‐Yu Ren   +5 more
wiley   +1 more source

Primary Production in the East China Sea and the northern South China Sea: distributions and correlations with phytoplankton community structure [PDF]

open access: yes, 2015
初级生产过程是海洋生态系统最重要的过程之一,是分析生态系统物质循环和能量流动的基础。对中国海初级生产过程研究,过去主要集中在初级生产力的量级和时空分布方面,缺少对初级生产过程的微观研究以及对初级生产力的调控机制的定量研究。本研究以中国东海和南海北部两个边缘海生态系统为主要研究对象,针对中国亚热带边缘海(东海和南海北部)初级生产力时空变化规律与调控机制,特别是与海洋水体光学特征和浮游植物群落结构的关系等科学问题。采用P-E曲线法和特征光合色素法分别进行初级生产力和浮游植物群落结构的测量 ...
谢聿原
core  

Genetic origins and climate‐induced erosion in economically important Asian walnuts

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation and management. Walnuts, generally referred to as Juglans regia and J. sigillata, are economically vital in Asia, but little
Peng‐Zhen Fan   +17 more
wiley   +1 more source

Riverine Nutrients Export and its Biogeochemical Behavior in the Jiulong Estuary under Subtropical Storm Events [PDF]

open access: yes, 2015
由于气候变化(极端暴雨事件增加)和人类活动干扰(人为氮磷输入增加),亚热带流域-近海生物地球化学过程与通量受到显著影响。本研究选取九龙江流域-河口系统作为整体研究对象,以九龙江河流-河口混合区作为重点研究对象,开展常态和暴雨事件河流-河口营养盐(氮、磷、硅)和悬浮颗粒物的综合观测,分析暴雨事件河流营养盐输出过程、通量及主要控制因素,探讨河口营养盐生地化行为对河流输入的响应关系。主要研究结论如下: (1)常态下九龙江两大干流(北溪、西溪)的营养盐氮磷时空分布受污染分布和类型、大坝滞留和水文条件的综合影响 ...
吴殷琪
core  

Spatial segregation and bycatch risk as potential drivers of population trends of wandering albatrosses at South Georgia

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract Spatial segregation in at‐sea distribution is frequently observed in seabirds and can have important implications for conservation and management. Globally, many albatross and petrel populations are declining due to bycatch in fisheries. In South Georgia, the decrease in wandering albatrosses (Diomedea exulans) differs among breeding sites ...
V. Warwick‐Evans   +3 more
wiley   +1 more source

一种中继网络中分布式空时分组码的设计

open access: yesGuangtongxin yanjiu, 2017
在传统的使用分布式空时分组码的中继系统中,中继节点生成码字矩阵需要控制信息开销,中继节点数目不能变化,因此无法适应实际通信场景。针对此缺陷,文章提出了一种新的分布式空时分组码编码方法,该方法在传统多输入多输出系统中引入分布式空时分组码,并采用放大转发协议。中继节点生成码字矩阵和相互协作时不需要控制信息开销,从而提高了协作通信系统的适应性和系统性能。最后MATLAB仿真结果表明,该方法在全分集、全速率和译码复杂度方面都具有更优异的性能。
楚恒勇, 孟李林
doaj  

Study on Geochemistry of Nutrient and Nutrient Criteria in Jiulong Estuary [PDF]

open access: yes, 2015
由于大量的人为输入河口的营养盐(特别是氮和磷),近海富营养化区域逐渐扩大。河口和近海水体的富营养化已经引起了全世界的广泛关注。水体富营养化对环境造成很多影响,比如水质恶化、赤潮爆发、生态系统结构改变、低氧和死亡区的出现以及大量的经济损失。研究河口营养盐循环,并建立合理的营养盐基准值保护河口及沿海水体的措施刻不容缓。 本研究融合多学科知识,对不同季节的九龙江河口地区进行了多个航次的现场采样和同位素培养,运用GIS技术并收集整理历史数据,揭示了九龙江河口营养盐时空变化、内部迁移转化过程以及水体营养盐浓度 ...
黄铮
core  

Identifying potentially suitable and accessible refugia to mitigate impacts of an emerging disease on a rare tree

open access: yesConservation Biology, Volume 39, Issue 6, December 2025.
Abstract Identifying refugia from emerging threats is vital to ensure the persistence of rare and threatened species, but modeling habitat distribution for these species is challenging and the role of people in refuge management is rarely considered. Myrtle rust is an emerging infectious disease that represents a grave threat to the rare wetland tree ...
Sarah M. Herbert   +7 more
wiley   +1 more source

The Future of AI in the GCC Post‐NPM Landscape: A Comparative Analysis of Kuwait and the UAE

open access: yesPolitics &Policy, Volume 53, Issue 6, December 2025.
ABSTRACT Comparative evidence of how two Gulf Cooperation Council (GCC) states translate artificial intelligence (AI) ambitions into post–New Public Management (post‐NPM) outcomes are scarce because most studies focus on Western democracies. To fill this gap, we examine constitutional, collective choice, and operational rules that shape AI uptake in ...
Mohammad Rashed Albous   +2 more
wiley   +1 more source

Governing the Ungovernable: Mapping the Development of Groundwater Irrigation and Groundwater Policies in India

open access: yesWorld Water Policy, Volume 11, Issue 4, Page 1048-1064, November 2025.
ABSTRACT Groundwater governance is complex due to several externalities associated with groundwater being an invisible natural resource tied to the land with millions of extractors and limited means of exclusion. The paper traces the evolution of groundwater irrigation in India and the corresponding change in groundwater laws and policies to address ...
Anindita Sarkar, Amrita Sarkar
wiley   +1 more source

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