Results 91 to 100 of about 14,910 (180)
Subsidies, Net Zero Transition and Public Debt: An Analysis for the Oil and Gas Industry in Brazil
Latin 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
Electronic structures and thermoelectric properties of several wide-band-gap semiconductors [PDF]
, 2016 由于化石能源的飞速消耗以及人类在应用化石能源过程中造成的环境污染，开发清洁可持续的新能源成为研究热点，热电作为新能源开发中的一员，在研究中遇到的主要问题是材料的热电转换效率难以提高。本文的主要工作是以第一性原理为基础，以SiC，GaN，ZnO等几种宽禁带半导体为对象，研究宽禁带半导体材料结构变化与其热电效率高低的关系。通过Quantumespresso和WIEN2k计算材料的电子结构，再用Boltztrap软件计算材料的热电性质，我们可以比较不同结构的同种化合物热电性质的变化情况，并找出定性的规律 ...
黄政
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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
“有 NP-VP”における“有NP”の機能と意味 : 助動詞との比較から [PDF]
, 2017 本稿は、現代中国語の“有 NP-VP”を研究対象とし、助動詞との比較の観点から“有 NP”の統語的・意味的特徴を明らかにすることを目的とする。“有 NP-VP”における“有 NP”は、意味的には助動詞のように、事態が実現する可能性や必然性などに対する話し手の判断や態度、いわゆるモーダルな意味を表すことができるため、モダリティの機能を持つ条件が備わっていると言える。しかし、統語的には、完全にモダリティ機能を持つ助動詞と同様に働けないため、“有 NP”をモダリティに位置づける根拠は不十分であるように思われる。
HE Qiulin, 何 秋林
core +1 more source
Achieving Transboundary Water Security Through Water Innovations: A Framework and Cases
World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Alternative sources of freshwater, provided by various innovations, have long been available to countries facing acute water stress. We hypothesize that avoiding and/or resolving conflict with neighbors—caused by the uncertainty of continued access to shared surface water and groundwater sources—is another driver of innovation adoption ...
David Lewis Feldman
wiley +1 more source
Study on reductive amination of biobased levulinic acid [PDF]
, 2016 乙酰丙酸是重要的生物基平台化合物，其转化利用受到科研工作者的广泛关注。乙酰丙酸的还原胺化是制备高附加值乙酰丙酸胺化衍生产品的重要途径，近年来成为研究的热点。本论文建立了无催化剂乙酰丙酸还原胺化的反应体系，探讨了乙酰丙酸还原胺化合成直链氨基酸4-二甲氨基戊酸（4-DAPA）和环状化合物5-甲基-2-吡咯烷酮（5-MeP）的反应途径。 首先，研究了以N，N-二甲基甲酰胺为胺源，在无催化剂条件下直接还原胺化乙酰丙酸合成新型化合物4-二甲氨基戊酸（4-DAPA）的反应途径。在200℃条件下反应4h，4 ...
王彦钧
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Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Urgency to save species from extinction has prompted increased investment in law enforcement in protected areas. To date, such law enforcement has largely focused on increasing costs and reducing opportunities for offending. However, these resource‐intensive approaches are not always effective and can contribute to conflict between people and ...
Freya A. V. St. John +3 more
wiley +1 more source
A Study on Sequencing Problem of Mixed-model Assembly Lines in Company Y Based on Genetic Algorithm [PDF]
, 2016 混流装配线通过对装配生产线的合理组织与排产优化，实现多品种共线装配，以较快的响应速度向客户提供定制的产品和服务。客车需求的多样化和客车市场的细分化，使得混流装配线成为Y公司普遍采用的一种生产方式。由于混流装配线复杂的装配过程会涉及不同的产品以及品种繁多的物料，因此，Y公司在努力改善其生产物流系统，以使混流总装线的运行更加平稳和高效。 本文在此背景下，以Y公司承装车间的Z总装线为研究对象，对其建立排序优化模型并利用遗传算法进行求解。首先，从装配流程和生产规划两方面分析Y公司总装线的管理现状 ...
谢平
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Genetic origins and climate‐induced erosion in economically important Asian walnuts
Conservation 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
Research on life cycle assessment of automobile power system in perspective of circular economy [PDF]
, 2016 随着汽车保有量的快速增长，中国石油对外依存度持续攀升，这给中国的能源安全、交通安全等问题带来更大挑战的同时也增加了环境污染，特别是大气污染。在未来市场的需求和全球对于环境要求不断提升的压力下，电动汽车以其显著的节能减排优势，受到政府青睐。政府高度重视电动汽车的推广应用，连续出台一系列政策进行大力扶持。然而目前对于电动汽车的节能减排优势国际上尚存在争议，特别是在中国这样以火电为主的电力结构背景下，推广使用电动汽车能否实现真正的节能减排效益还有待研究明确。 本文基于循环经济视角，采用生命周期评价 ...
陈雯雯
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