Results 1 to 10 of about 14,018 (119)

Growing Demand and Uneven Supply: Eight Years of Nature Education in China 需求增长与供给不均:中国自然教育八年发展回顾

open access: yesIntegrative Conservation, Volume 5, Issue 1, Page 46-58, March 2026.
ABSTRACT This study examines the role of nature education in advancing conservation and sustainability in China between 2014 and 2023. Drawing on national survey reports and historical–comparative methods, it analyses the dynamics of public demand, institutional supply, and practitioner capacity.
Qi Yunxi, Lyu Xiang, Huang Yu
wiley   +1 more source

加速遗传算法在小流域水土保持多目标综合优化模型中的应用

open access: yesShuitu Baochi Xuebao, 2002
将基于实数编码的加速遗传算法 (RAGA)与多目标规划相结合 ,解决了多目标规划中多维参数寻优问题 ,避免了逐步法 (STEM)早熟、提前收敛以及易陷入局部最优等弊端。在建立松嫩平原兴隆小流域水土保持多目标综合优化模型中得以应用 ,取得了满意效果 ...
付强 周江红 金菊良 王立坤 门宝辉
doaj  

A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou   +12 more
wiley   +1 more source

基于经济性与环保性的微电网多目标优化调度研究

open access: yesGaoya dianqi, 2015
微电网的研究及发展归根结底是为了应对目前能源、资源紧张,环境污染等一系列问题,因此微电网不仅要满足基本供电需求,还应提高其经济性与环保性。文中主要通过建立分布式电源模型及多目标优化模型对微电网内的分布式电源进行优化调度,根据对微电网的具体要求运用遗传算法进行优化计算,进行最优化配置。算例结果通过24 h内不同优化的结果进行对比,得到最优配置,验证了模型在微电网多目标优化方面的有效性,从而达到对微电网整体性最优化。
赵磊, 曾芬钰, 王霜, 杨宝泉
doaj  

Subsidies, Net Zero Transition and Public Debt: An Analysis for the Oil and Gas Industry in Brazil

open access: yesLatin American Policy, Volume 17, Issue 1, March 2026.
Abstract Despite awareness of the challenges in promoting the decarbonization of the economy, explicit fossil fuel subsidies have increased considerably worldwide in the past decade, reaching an all‐time high at US$1 trillion in 2022. Considering the net‐zero transition and the increase of modern public debt, this article assesses the most relevant ...
Fernando Inti Leal   +2 more
wiley   +1 more source

基于多目标优化的游戏地图生成研究

open access: yes四川大学学报. 自然科学版, 2013
游戏地图自动生成是目前过程内容生成PCG(Procedural Content Generation)研究的热点之一.本文以开源RTS游戏MegaGlest的地图为研究对象,以公平性、可玩性、战略性和趣味性为优化目标,提出多目标粒子群优化的游戏地图生成算法.实验结果表明,自动生成的地图在4个优化目标方面具有明显改进,能给玩家提供更好的游戏体验.
李枭, 牟超, 林涛, 周刚
doaj  

Smart Biomaterials and Dressings for the Treatment of Chronic Inflammatory Skin Diseases

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Chronic inflammatory skin diseases, encompassing immune‐inflammatory conditions and infection‐associated dermatoses, pose significant clinical challenges due to high prevalence, recurrence, and therapeutic resistance, affect over 30% of the global population.
Zehao Lan   +5 more
wiley   +1 more source

Land tenure contributions to protected area growth under alternative conservation targets in the Australian monsoon tropics

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract As the global protected area (PA) network expands to meet international targets, it is important to assess whether traditional reliance on public land will suffice for projected PA growth or whether other tenures, such as Indigenous or pastoral lands, may increasingly contribute.
Emmeline Norris   +2 more
wiley   +1 more source

真空断路器弹簧操动机构中分闸弹簧的多目标综合优化

open access: yesGaoya dianqi, 2007
针对弹簧设计中簧丝直径、弹簧中径、工作圈数等结构参数均为标准值或是离散变量,且不可避免地存在加工误差等因素使弹簧实际尺寸偏离设计值,导致弹簧力特性改变等实际问题,提出了以弹簧刚度误差最小、在弹簧尺寸变化时弹簧刚度的可能最大变化量最小,并使弹簧的质量最轻的多目标综合优化方案。通过定义功效系数来协调各子目标之间的关系而使多目标综合优化降为单目标优化。结合分闸弹簧的结构特点及技术指标,采用混合离散优化等技术手段进行求解,获得了满足工程实际要求的分闸弹簧的最佳结构参数,使分闸弹簧的力特性得到了改善。
陈刚, 孙波, 王尔智
doaj  

Hollow Porous Nitrogen‐Doped Carbon‐Confined FeP/Fe2P Nanoparticle‐Armored Catalyst for Efficient Oxygen Reduction Reaction in Aqueous/Flexible Zinc‐Air Batteries

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT The design of nanoparticles confined in hollow N‐doped carbon structures is crucial for improving the oxygen reduction reaction (ORR) kinetics, yet achieving this remains a significant challenge. In this work, hollow porous nitrogen‐doped carbon encapsulated FeP/Fe2P (H‐FeP/Fe2P) were successfully constructed via a templating method combined ...
Li‐Xia Wang   +8 more
wiley   +1 more source

Home - About - Disclaimer - Privacy