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Base on Fuzzy Theory Risk Investment Research [PDF]

open access: yes, 2009
风险投资面临着极大的不确定性,需要合理适用的方法对投资项目进行评估与决策。但现有的风险评估方法通常采用确定的数值来衡量风险指标体系,忽略了风险指标的不确定性;实物期权方法虽然能弥补传统价值评估理论存在的缺陷,较好地量化不确定性带来的期权价值,其定价模型的前提假设却与投资的实际情况不相符合。不断发展的模糊理论为处理此类问题提供了有力的工具。将模糊理论引入到风险投资的评估与决策及相关问题的研究中,能够很好地解决风险指标的不确定和定价模型参数难于估计等问题。 本文将模糊理论与实物期权理论、不确定理论 ...
孔祥丽
core  

Eurovision Song Contest: From Apolitical to Mega‐Political?

open access: yesPolitics &Policy, Volume 53, Issue 3, June 2025.
ABSTRACT In the realm of a changing geopolitical landscape and the concomitant politicization of culture, this article focuses on how shifts in political orders within the broader context affect and politicize a cultural party. The study draws inspiration from the Eurovision Song Contest (ESC) and how the 2024 edition of the contest underscored, more ...
Christina Öberg
wiley   +1 more source

新型静止无功发生器的模糊滑模控制方式研究

open access: yesGaoya dianqi, 2007
阐述了新型静止无功发生器(STATCOM)的基本原理,应用滑模变结构理论与模糊控制理论,设计了能同时改善电力系统功角稳定与装设点电压动态性能的STATCOM模糊滑模控制器(FSMC)。针对含STATCOM的单机-无穷大系统进行的电力系统暂态仿真结果表明:与常规STATCOM控制器相比,设计的模糊滑模控制器能更有效地提高电力系统的稳定性,改善动态响应品质。
茅靖峰, 孙玉坤, 吴爱华
doaj  

储能应急车优化调度的模糊机会约束方法

open access: yesGaoya dianqi, 2021
移动储能技术作为一种新型的灵活性资源,其在电力系统的防灾与应急支援等多种场景中发挥了非常重要作用。在此背景下,提出了基于模糊机会约束规划的储能应急车优化调度模型,以最大程度地恢复重要电力用户的供电并减少停电损失。首先,介绍了储能应急车的工作原理,提出了考虑负荷分级和行驶时间不确定性的储能应急车优化调度的模糊机会约束规划模型,该模型以最小化总停电损失为优化目标,实现对一级负荷的持续供电。然后,针对行驶时间的不确定性,采用模糊理论中的模糊参数表示行驶时间 ...
肖凯超   +5 more
doaj  

Authoritarianism and the Emergence of Parallel State Dynamics: Evidence From the Syrian Earthquake

open access: yesDigest of Middle East Studies, Volume 34, Issue 1, Winter 2025.
ABSTRACT This article investigates the Syrian regime's strategic manipulation of the February 2023 earthquake to reaffirm its authority and maintain legitimacy. The regime's response to the disaster is analyzed to understand how authoritarian states leverage natural disasters for political gains. It argues that the Assad regime's survival is not merely
Rahaf Aldoughli
wiley   +1 more source

基于模糊理论的输电线舞动状态评估

open access: yesGaoya dianqi, 2011
针对输电线导线舞动状态评估具有模糊性和随机性的特点,分析了影响输电线舞动状态的因素,根据已有的研究成果和专家经验,从输电线舞动状态评估的需要以及实际可操作性出发,选择适当的指标来尽量全面、准确地评估导线舞动状态,提出了基于模糊理论的输电线舞动状态综合评判,建立了包含导线舞动振幅、舞动频率、风参数、覆冰厚度等因素的评估指标体系。首先应用模糊层次分析法确定各指标的常权,然后引入基于均衡函数的变权模式,对常权进行修正得到变权;各因素数值进行归一化处理后,选取了不同的模糊函数分布来确定各指标的隶属度函数 ...
王峰   +4 more
doaj  

“Parole, parole”: Unveiling the narrative framework of EU research and innovation projects

open access: yesPolitics &Policy, Volume 52, Issue 6, Page 1210-1226, December 2024.
Abstract This article examines the narrative framework in European Union (EU) research and innovation projects, focusing on symbolic practices and terminology. The analysis includes over five years of ethnographic research, and 20 European projects funded by Horizon 2020, Horizon Europe, and Erasmus+ programs.
Gregor Cerinšek, Dan Podjed
wiley   +1 more source

基于遗传算法的高阶模糊BP神经网络在齿轮故障诊断中的应用

open access: yesJixie chuandong, 2004
将模糊逻辑理论和遗传算法引入高阶BP神经网络中 ,讨论了高阶模糊BP神经网络的特征值的提取、结构、特点、二阶算法以及遗传算法 ,并将该神经网络模型用于齿轮的故障诊断中 ,试验表明基于遗传算法的高阶模糊BP神经网络对齿轮故障模式具有稳定、准确的识别能力 ,是一种行之有效的新型诊断方法。
戚晓利, 潘紫微
doaj  

Evaluation of Tourism Destination Competitiveness─A Comparative Research of Key Influencing Factors in Taiwan Cities [PDF]

open access: yes, 2017
台湾地区自1999年来不断推出新的旅游改善政策,加剧了各县(市)旅游目的地的竞争。因此要确保可持续性发展,就必须采取有效措施提升旅游目的地竞争力,这使得分析与评价旅游目的地竞争力关键影响因素显得相对重要,它既可以明确目的地的竞争力程度,又为资源有效分配指出具体方针。 此外,在旅游目的地竞争力评价中,难免会有信息模糊性与主观性过强的问题,这就导致台湾地区各县(市)旅游目的地竞争力评价成了一个典型信息模糊性与群体决策主观性的问题。但大多数的旅游目的地竞争力评价方法以定量方式居多 ...
霍定文
core  

Borderline content and platformised speech governance: Mapping TikTok's moderation controversies in South and Southeast Asia

open access: yesPolicy &Internet, Volume 16, Issue 3, Page 543-566, September 2024.
Abstract Content moderation comes with trade‐offs and moral dilemmas, particularly for transnational platforms governing borderline content where the boundaries of acceptability are subject to debate. While extensive research has explored the legality and legitimacy of platformised speech governance in established democracies, few address the ...
Diyi Liu
wiley   +1 more source

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