Results 81 to 90 of about 22,799 (175)
Designing Integrated Policies for the Twin Transition: Challenges and Tradeoffs
Policy 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
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Coalition Breakdown and Subsystem Exit
Policy Studies Journal, EarlyView.ABSTRACT Why actors choose to work together (or not) to advance policy has been the central area of inquiry within the Advocacy Coalition Framework (ACF). Existing research has mainly emphasized the pathway towards coalition formation and evolution, underscoring the stable patterns of allies and opponents observable in policy processes over a decade or
Charlie F. Thompson
wiley +1 more source
Dynamics and controlling factors of trace elemental composition of micro-organisms and particles in seawater [PDF]
, 2017 铜钼等痕量金属是海洋浮游植物与细菌等微型生物生长代谢所必须的营养物质。长期以来，溶解态金属已积累了大量数据，但对微型生物内的痕量元素组成仍缺乏研究。近年来的研究表明，这些微型生物细胞内的痕量元素含量也存在着一定的差异性，并可能直接决定着微型生物的生长代谢过程。但目前为止，就本人所查文献资料所知，其细胞内元素组成的的动态变化及主控因素尚未有报道。 为进一步探究海洋痕量元素参与和影响微型生物生长代谢的这一过程，本论文主要进行了三个方面的研究工作：1）系列室内调控培养实验 ...
郑辰禾
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Governing by Ambiguity: Sociotechnical Imaginaries of Platforms in China
Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT Besides clear policy directives, the unresolved and open‐ended elements in policy communication also create discursive politics. This article argues that ambiguity in policy communication reflects the state's exercise of power within a fractured sociocultural landscape.
Fangyu Qing, Ngai Keung Chan
wiley +1 more source
智能科学与技术学报, 2019 阿尔兹海默症作为一种常见且多发的疾病，严重影响着中老年群体的生活质量与水平，深入理解阿尔兹海默症的发病机制和发展进程对于研发相关预防措施及治疗手段非常重要。现有研究大多基于病变前后大脑静态特性的对照分析，忽略了其病变过程中的动态演化机制。基于功能磁共振成像数据构建大脑功能网络，对其病变过程纵向发展中神经系统动态演化过程进行深入研究，提出了一种基于脑网络水平的阿尔兹海默症病变过程的动态演化模型，以模拟大脑在神经系统病变过程中的动态演变及可塑过程，最后，从多个角度对演化结果进行评估，验证了模型的合理性 ...
倪冰洁, 李炜, 陈曦
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Political Cycles, Electricity Policy, and Mexico's Economy
Latin American Policy, Volume 17, Issue 2, June 2026.ABSTRACT Electricity reform in Mexico should stimulate economic growth, improve energy efficiency, and reduce greenhouse gas emissions. This article evaluates the successes and failures of reform and draws lessons across political cycles by analyzing changes in political dynamics—often tied to policy reversals—and the legal framework during the pro ...
David Bonilla
wiley +1 more source
Gaoya dianqi配电变压器噪声问题突出，文中通过分析变压器表面振动噪声特性及模态参数，提出了10 kV变压器油箱结构优化措施。对10 kV配电变压器进行了振动测量，并仿真计算了变压器各结构对辐射噪声的贡献，分析得到油浸式变压器振动最大位置为距离底部20 cm左右处，振动主要能量集中在100、200、300 Hz上，油箱正面和背面对噪声辐射声功率贡献最大。通过分析油箱结构模态参与因子，获得了油箱的优势模态，确定了油箱优势模态振型的最大位置，计算结果与测量基本相同，在此基础上采取附加质量块来优化油箱结构振动分布 ...
胡静竹 +4 more
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Reprogramming of global histone methylation controls the differentiation of monocytes into macrophages [PDF]
, 2016 单核-巨噬细胞系统由一类具有吞噬功能的免疫细胞组成，包括单核细胞、巨噬细胞及树突状细胞，是机体免疫系统重要的组成之一。来源于造血干细胞的单核细胞在趋化因子激活下，分化为巨噬细胞和树突状细胞，参与机体防卫。目前有关单核-巨噬细胞分化的细胞学过程已基本阐释，然而分化进程中关键分子及其调控网络仍需要深入阐明。此外，单核细胞如果过度增生，会导致正常造血功能衰竭。白血病的发生也与单核-巨噬细胞系统的异常发展有关。因此，深入探索和阐明单核/巨噬细胞形成过程中关键转录因子及其调控网络 ...
王慧敏
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Spatially Downscaling of Future Food Demand for Policy Planning
World Food Policy, Volume 12, Issue 1, May 2026.ABSTRACT Understanding the subnational dynamics of food demand, while accounting for the evolution of the agrifood system at the global level, remains a challenge for designing food policy to ensure food security. To link global agrifood systems with subnational food policy planning, we downscale per capita food demand for 62 food commodities at the ...
Chun Song +3 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1995 为了解在肝硬变的发展过程中脾脏的形态结构和功能将出现何种变化。本实验动态观察了以四氯化碳诱发大鼠肝硬变病程中不同时期，脾脏的形态结构及抗感染功能的变化。结果发现，在肝硬变发展的各个阶段，脾脏的形态结构出现了一系列变化，初期脾组织充血、水肿；随之。白髓动脉周围淋巴鞘区及生发中心增生；最后，红髓面积扩大，白髓面积缩小，纤维组织增生，同时伴有脾脏的抗感染功能明显下降。研究提示，在肝硬变形成以后，脾脏也逐渐出现纤维化改变，而失去原有的功能。
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