Results 11 to 20 of about 23,098 (190)
How Changing Narratives About the Future Shape Policymaking for the Long Term
European Policy Analysis, EarlyView.ABSTRACT How can we explain decisions by governments to engage in policy investments—accepting short‐term costs in return for anticipated gains in the longer term—after previously sustaining the status quo? Our article examines the role of narratives in changing expectations about the future as a key driver of intertemporal policymaking. In light of an
Pieter Tuytens, Charlotte Haberstroh
wiley +1 more source
Integrative Conservation, EarlyView.First confirmed breeding of the Brown Hornbill in China, documented through cooperative feeding in Shangyong Protected Area. ABSTRACT The Brown Hornbill (Anorrhinus austeni), a Near Threatened frugivore, reaches the northern edge of its distribution in southern Yunnan, China, yet breeding had not been previously documented with site‐attributed nests in
Junsong Li +8 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2019 通过共沉淀法和两段焙烧的方式制备了丙烷选择氧化制丙烯酸的Mo1V0.3Te0.23Nb0.12SbxOy催化剂，并通过 XRD、XPS、H2-TPR、NH3-TPD 等表征手段探讨了Sb 元素的引入对催化剂相结构、表面酸碱性、氧化还原性等的影响。实验结果表明，适量Sb 元素的掺杂使得催化剂相结构中活性相M1 和M2 的相对量发生明显变化，催化剂表面酸性降低，氧化能力减弱，催化剂表面Mo6+和V5+物种量减少，提高了丙烯酸的选择性。当Sb/Mo 为 0.01 时，其丙烯酸选择性高达78.6%，得率可达48.
ZHANGWensheng(张文生) +2 more
doaj +1 more source
Creating the future for a better world [PDF]
, 2014 WFF is a grant-making foundation, based in Singapore, but for the world. It provides financial support to a number of organizations and programs related to environmental and social sustainability research. Through these programs, WFF hopes to bring forth
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Rare Metals, EarlyView.ABSTRACT Nb‐Si‐based superalloys are considered as the most potential candidate materials for nickel‐based superalloys due to the lower density and higher using temperature. Here, a type of stable Nbss/γNb5Si3 bi‐phases structure with a coherent interface has been successfully designed. Additionally, the Nbss and γNb5Si3 phases showcase the orientation
Xiao‐Wei Wang +6 more
wiley +1 more source
The Feasibility Study on the Municipal Solid Waste Incineration Slag as Fine Aggregate of Concrete [PDF]
, 2016 随着城镇化的快速推进和人民生产、生活的发展，大量增加的生活垃圾已成为全国一个比较严重的社会问题。发达国家的发展历程表明，通过焚烧可使垃圾减量80%～85%，减容约90%，但仍将残留总重约10%～20%的焚烧炉渣，大部分炉渣进入填埋场进行填埋处置，这将显著增加城市周边填埋库容的压力，占用大量的土地。 与此同时，大规模的城镇化和基础设施建设对于混凝土的需求量稳定增长，混凝土用砂数量巨大，加上砂浆和其他用途，估计每年全国需要30亿吨以上建设用砂。随着对砂子的不断开采，全国天然河砂资源趋于枯竭。福州、厦门 ...
张世相
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Rare Metals, EarlyView.ABSTRACT Rare earth elements (REEs) play an irreplaceable role in modern technology and industry. However, due to the highly similar physicochemical properties among REEs, their separation remains a significant challenge. Additionally, REEs often exist in low‐concentration solutions, making efficient REE recovery an urgent task.
Miao‐Miao Huang +6 more
wiley +1 more source
Research on JP switchgear production decisions of A Co.,Ltd. [PDF]
, 2016 随着社会经济发展和人民生活水平的提高，国家在电网建设方面的投资步伐稳步加快，这为承担电能控制和保护作用的专用设备——开关柜，提供了更加广阔的市场前景。然而中低压电气成套制造行业也面临着产能过剩、成本攀升、利润不断下滑的竞争形势。为了应对这种局面，越来越多的电气成套制造企业日益注重生产决策管理，通过完善决策手段，不断降低成本来提升企业竞争优势。论文对A公司JP开关柜生产决策方面存在的问题进行了深入分析和研究；将本量利分析法和边际贡献分析法应用于开关柜生产决策方案设计 ...
束剑文
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Rare Metals, EarlyView.ABSTRACT Achieving a simultaneous enhancement of strength and ductility remains a critical bottleneck for the large‐scale and cost‐effective engineering application of magnesium alloys. In this work, guided by first‐principles calculations, we tailored the τ‐Mg32(Al,Zn)49 phase and optimised twin boundary, thereby designing and successfully ...
Yun‐Xuan Zhou +8 more
wiley +1 more source
, 2015 海岸带区域的污染具有内容广泛、状况复杂和管理决策难度较大等特点。由于海岸带环境中的化学污染物往往以混合形式存在,因此单一化学品高剂量暴露下的生态毒性研究结果难以适用于环境中低剂量混合物的生态毒理效应诊断及风险评价。传统的风险评价体系多是在实验室模拟条件下以单一物质的急性或慢性毒性试验为依据,往往很难正确反映实际环境中污染物混合存在时的生态行为及环境危害。随着技术的进步和人类认识能力的进一步提高,研究者们已经聚焦于发展数学模型用以预测及评价化合物的联合毒性 ...
于德良 李斐 吴惠丰 赵建民 +1 more
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