Results 51 to 60 of about 7,772 (145)
Review of Policy Research, EarlyView.ABSTRACT In the face of increasingly complex environmental challenges, subnational governments play a critical role in implementing climate policies. This study investigates how intergovernmental interactions—specifically formal authority interactions and informal competitive interactions—shape the adoption of climate policies by Chinese provincial ...
Shiming Zheng, Alex Jingwei He, Yujie He
wiley +1 more source
Gaoya dianqi, 2019 基于电弧电流特征的故障电弧检测方法存在信息源单一的不足,容易引起保护误动作和拒动作。针对该问题,文中以电弧辐射的电场和磁场信号以及电弧电流作为检测信号,提出一种基于神经网络和D-S证据理论的故障电弧检测方法。首先,采用模极大值方法提取不同负载下电弧电磁辐射信号特征量,并用波形相似法提取电弧电流信号特征量;其次,利用BP神经网络构建各个特征量与电弧故障之间的映射关系,得到单个特征量的故障电弧识别率;最后,以该识别率作为D-S证据理论的输入,实现决策级多特征信息融合。在典型负载情况下的试验结果表明 ...
陈照 +4 more
doaj
Data Reduction and Rule Extraction Based on Rough Set [PDF]
, 2007 粗糙集理论是由波兰科学家Z.Pawlak在1982年提出的一种处理模糊和不确定知识的数学工具，已经成功应用于机器学习，模式识别，数据挖掘等领域。利用粗糙集理论进行数据挖掘，抽取知识规则，最重要的一点就是基于粗糙集的属性约简和规则提取算法的研究。通过约简的操作，降低属性的维数，提取出适合于决策支持的知识规则，是粗糙集理论的最重要应用之一。 属性约简的求解是一个NP-Hard问题，导致该问题的主要原因是属性的组合爆炸。目前还不存在一种非常有效的方法，因此寻求快速的属性约简算法仍是粗糙集理论的研究热点之一 ...
黄丽萍
core
Opportunistic routing algorithm based on trust model for ad hoc network [PDF]
, 2013 Due to the absence of enough physical protection,dynamic topology,distributed collaboration,the limited bandwidth and computing ability in ad hoc network,traditional routing security mechanism cannot adapt to the design of routing protocols.Recently ...
Bo WANG, Xun-xun CHEN
core +1 more source
Focusing Events, Agenda Setting, and Narrative Numbing
Review of Policy Research, EarlyView.ABSTRACT Focusing events are important in understanding policy change, as demonstrated in Birkland's work on agenda setting, the multiple streams framework, and the narrative policy framework. These frameworks emphasize the role of focusing events in drawing public attention to broader issues.
Megan K. Warnement Wrobel +1 more
wiley +1 more source
Gaoya dianqi, 2016 针对变压器状态信息的不确定性,建立了变压器层次化状态评估模型,组建了变压器的状态指标体系,综合指标的主、客观权重设计了其最优权重。运用灰色聚类方法对单项指标作聚类分析以得到综合指标所处状态,改进了D-S证据理论中的冲突证据合成规则,将聚类系数作为基本概率赋值函数以评价变压器的整体状态。实例分析结果显示,文中建立的评估模型具有较高的识别准确率,可以有效地把握变压器的运行状态并为变压器实行状态检修提供良好的指导作用。
苗飞, 任建文, 汤国庆, 魏俊姣
doaj
Veterinary Dermatology, EarlyView.Canine atopic dermatitis (cAD) is a chronic condition requiring life‐long management. Accurate diagnosis can be challenging, with no reliable diagnostic test. This study aimed to generate a simple diagnostic model for cAD. This model is a relevant prototype for an app‐based tool to support general practitioners in the diagnosis of cAD alongside ...
Xavier Langon +2 more
wiley +1 more source
ON-LINE IDENTIFICATION of WHEEL WEAR CONDITION IN PRECISION GRINDING BASED ON INFORMATION FUSION [PDF]
, 2013 高质量非球面光学元件批量制造是目前精密磨削技术力求实现的目标。为了提高非球面光学元件精密磨削的加工效率,必须在加工过程中动态识别砂轮磨损状态,在砂轮接近或达到寿命周期时对其进行修整。寻求一种经济可行的方式,实现砂轮寿命周期在线评估,利用声发射、砂轮振动、磨削力等多种类型加工过程信号,提取和选择能够全面、灵敏反应砂轮磨损状态的特征,基于dEMPSTEr-SHAfEr证据理论,进行多源信息融合,实现精密磨削砂轮磨损状态在线识别。Grinding wheel should be addressed when ...
毕果, 郭隐彪, 韩伟
core
Risk Assessment of Hydrogen Production Station Equipment Based on Event Tree Cascading Fault Deduction and Evidential Reasoning [PDF]
The hydrogen production station system is complex and vulnerable to external attacks, causing cascading failures and serious safety accidents. The cascading failure deduction method based on event tree was adopted to determine the consequences and ...
DONG Yuliang +6 more
core +1 more source
Veterinary Dermatology, EarlyView.ABSTRACT Background Canine atopic dermatitis (cAD) is a multifactorial, inherited skin disease, estimated to affect ≤ 15% of dogs. Studies of skin messenger mRNA in cAD currently use invasive methods, including blood sampling and biopsy collection, whilst advances in human atopic dermatitis study methodology have demonstrated reliable use of minimally ...
Xavier Langon +5 more
wiley +1 more source