Results 51 to 60 of about 19,407 (168)
Statistical analysis about zero-failure date(无失效数据的统计分析)
Zhejiang Daxue xuebao. Lixue ban, 2012 讨论了寿命服从指数分布的无失效数据，利用指数分布的凸性和无记忆性，给出了可靠度的E-Bayes估计和多层Bayes估计，利用数值算例来说明两者之间的关系，并得到了在这两种情况下参数θ的加权最小二乘估计.
LIUYong-feng(刘永峰) +1 more
doaj +1 more source
, 2012 1994年起实行的分税制改革改变了当时的地方财政包干制,同时带有很大的过渡性质,已经出现了程度不同的问题,最突出的就是中央与地方事权划分不明确,存在着越位、缺位、错位现象。本文从公共部门经济学的角度,分析近年来事权存在的问题,从财政支出角度提出事权划分范围,并运用数学建模的方法,利用柯布—道格拉斯生产函数求解中央与地方政府的责任分配,寻求最优分权 ...
王玥
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Algorithm study of digital HPA predistortion using one novel memory type BP neural network [PDF]
, 2014 Based on the characteristic analysis of the high power amplifier (HPA) in wide-band CMMB repeater stations,a novel neural network was proposed which can respectively process the memory effect and the nonlinear of power amplifier.The novel model based on ...
Chun-hui HUANG, Yong-jie WEN
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Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT This study applies the Narrative Policy Framework (NPF) within a non‐democratic context, exploring the role of policy narratives in the implementation of patient‐centred healthcare policy in China. Drawing on a dataset of academic journal articles that reference both “market” and “patient‐centredness,” the research reveals how local ...
Jingqing Yang
wiley +1 more source
Gaoya dianqi, 2023 针对目前电磁环网开环方案综合评价方法主观性过强，评估指标体系不完善问题。文中提出了一种基于综合赋权的电磁环网开环方案评价方法。首先，分析电磁环网开环原则及机理；在此基础上，综合考虑系统安全稳定性、限流效果等因素，构建开环方案综合评价指标体系；然后利用层次分析法与变异系数法求出主、客观权重系数，进而通过综合评价方法计算得到评估开环方案优劣的综合评价指标；最后通过39节点标准算例、湖南省某地区实际电网算例，结合电力系统分析综合程序（PSASP）仿真分析，验证了文中所提方法的有效性与在实际电网中应用的合理性。
陈道君 +5 more
doaj
Zhejiang Daxue xuebao. Lixue ban, 2022 游客公民行为是促进旅游地保持竞争力、实现持续发展的重要推手，现有研究主要参照顾客公民行为的逻辑框架，未能突出旅游情境和游客群体的独特性。以浙江省3个国家级旅游度假区游客为研究对象，基于社会交换理论和心理所有权理论，构建了一个可调节的中介模型，探究地方依恋、地方心理所有权、自我提升动机与游客公民行为的关系。用SPSS 22.0和AMOSS 23.0软件分析收集到的419份样本数据，结果表明：地方依恋正向影响地方心理所有权和游客公民行为；地方心理所有权正向影响游客公民行为 ...
XUZhimeng(许智濛) +2 more
doaj +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 2, Page 207-219, February 2026.ABSTRACT Objective To test the non‐inferiority of extended abdominopelvic ultrasound examination compared with contrast‐enhanced computed tomography (CT) and whole‐body diffusion‐weighted magnetic resonance imaging (WB‐DWI/MRI) in discriminating preoperatively between resectable and non‐resectable disease based on the European Society for Medical ...
D. Fischerova +26 more
wiley +1 more source
Assessment on the Eco-suitability of Human Settlement in the Real Estate Project by Fuzzy Multiple Comprehensive Method [PDF]
, 2008 以现代住区人居生态环境的要求和前人研究为基础,立足于以人为本和便于实际评估工作的开展,综合考虑人居生态环境健康、舒适的特点,在类比众多评价方法和参考国内外指标体系的基础上,运用模糊综合评价对某一大型房地产项目的生态宜居性进行初步分析,以期完善、充实中国房地产项目的生态宜居性评价体系和方法,为该领域的进一步研究提供基础。Based on the requirements and existing research materials for the eco-environment of human ...
吴犇, 王颖, 颜海波
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World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Urban expansion significantly impacts flood risk, particularly in rapidly growing areas where impervious surfaces exacerbate surface runoff. This study examines spatial patterns of urban growth and their effects on flood exposure in Mecklenburg County, North Carolina, from 2011 to 2021.
Pegah Madadi, Azad Sadeghi
wiley +1 more source
Dual-target WOA spectrum sharing algorithm based on Stackelberg game [PDF]
, 2020 In order to solve the complex spectrum allocation problem,a dual-target whale optimization algorithm (WOA) with strong parallel computing capabilities was introduced,and a Stackelberg game model was proposed that could effectively reflect the actual ...
Li ZHANG, Tian LIAO, Yejun HE
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