Results 21 to 30 of about 1,201,062 (168)
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
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Individual Uncertainty and Policy Compliance During the COVID‐19 Pandemic
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 2, June 2026.ABSTRACT Ample scholarship examines the extent to which public policies in representative democracies reflect the priorities and needs of the public, often finding that individuals are unaware of many policy issues and policy responses. This may be especially true when issues of risk and scientific uncertainty are involved, which can be difficult for ...
Nathan Jeschke +6 more
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Zhendong Ceshi yu Zhenduan针对煤矿锚杆钻车姿态估计中惯性导航的多源噪声，提出一种基于噪声敏感先验的改进变分模态分解（variational mode decomposition，简称VMD）惯导异构信号降噪方法。首先，利用加速度和角速度时频域参数特性变化，探究捷联惯导异构信号的噪声敏感差异和多源噪声作用规律；其次，根据异构信号噪声敏感先验和最大峭度变化趋势，构建双分解层，并通过能量波动模型监测在不同分解层下模态分量的能量变化，避免参数固定造成的过分解和欠分解问题，实现对惯导异构信号同步VMD分解；然后，根据皮尔逊相关系数 ...
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Gaoya dianqi, 2023 电力变压器绝缘老化评估为电网的长期安全稳定运行提供了技术支持，在保证非破坏性试验的基础上，对绝缘状态进行诊断也是一直以来的研究热点。文中基于广义维纳过程对变压器建立老化模型，通过相关试验数据得到老化诊断指标，从而衡量变压器绝缘老化状态。对变压器健康状态进行分级，采用上述模型预测最短降级时间，相比于直接进行寿命预测，短期预测可以将未来人为操作信息纳入模型，最大化解决信息挖掘不充分的问题。最后对老化评估模型的相关分布参数进行优化求解，采用内蒙古电网设备真实历史数据迭代训练 ...
刘琦 +5 more
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Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
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Conservation Biology, Volume 40, Issue 3, June 2026.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
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Gaoya dianqi, 2023 文章提出了基于合闸振动信号的变压器振动固有频率识别方法，可以据此来实现对变压器机械状态的评估。首先，文章建立了变压器多自由度非线性轴向振动模型，通过计算得出变压器在发生故障时其固有频率将会发生变化，而振动固有频率可以从变压器的合闸振动信号中提取得到，基于此文章提出了基于变分模态分解和特征系统实现算法结合的变压器固有频率识别方法，并根据固有模态分量的统计特性，提出了基于延时峭度法的模态识别方法，最后通过仿真与实验证明所提方法较传统方法而言可以有效的降低谐波模态的干扰，提高固有频率的识别精度。
马宏忠 +6 more
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全球能源互联网, 2019 考虑到电动汽车保有量和充电需求不断增长的现状，在满足用户需求的基础上，提出电动汽车充电站的动态规划方案，使得充电站容量和数量可随充电需求的改变而不断扩展，同时实现充电站建设投资成本最小化。该方法以充电站综合建设投资成本最小为目标，采用自适应粒子群优化算法求解充电站静态规划模型，再根据需求量的改变采用多种方法对充电站进行动态规划。共提出3种不同的动态规划模型，分别为动态规划模型、优化选择动态规划模型与改进优化选择动态规划模型。算例分析充分验证了充电站动态规划方案的可行性与合理性 ...
陈黎军 +3 more
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Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
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Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
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