Results 41 to 50 of about 479,283 (106)
中西医结合护理, 2023 Objective To explore the demand of family members of children with cardiovascular diseases for home care and analyze the influencing factors. Methods A total of 198 family members of children with cardiovascular diseases from a certain hospital in ...
MOU Xiao (牟啸)
doaj +1 more source
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Arranging functional units into a specific organization is a practical structural strategy for achieving fabulous performance, known as the functional unit and organization (FUO) paradigm. This paradigm offers a concise shortcut to establishing structure–performance relationships.
Zhongtao Lu +5 more
wiley +1 more source
, 2010 需求是后续开发活动的基准，早期的一些研究者认为应该在需求完全确定之后再进行后续开发，Royce所提出的瀑布模型就是这种思想的一个体现。但是，实践经验告诉我们，不管前期的需求分析做的多么完美，需求还是会发生变更。一方面是因为需求本身很复杂，对它的分析、理解和描述是一个循序渐进的过程，不可能一蹴而就；另一方面由于用户期望和偏好的改变、市场环境的转变、使用环境的日益复杂、技术的革新等都会使得原有的软件系统无法满足各涉众的利益。因此，需求变更是软件开发中固有的规律，是不可避免和普遍存在的 ...
李引
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Ensuring uncompromised safety across interconnected domains is vital for global societal sustainability. Metal–organic framework (MOF)‐based nanocomposites, owing to their intrinsically tunable structures and broad functional versatility, represent a powerful class of materials for safety‐related engineering.
Rongfu Peng +6 more
wiley +1 more source
Gaoya dianqi, 2020 为促进孤岛微网中可再生能源的消纳,减小负荷峰谷差。文中在孤岛微网中引入价格型需求响应,以微网运行成本最低和柴油发电机出力最少为目标,综合考虑功率平衡、抽水蓄能机组启停与工况转换等约束条件,构建了含风电、抽水蓄能和柴油发电机的孤岛微网多目标优化调度模型,并采用乌鸦搜索算法进行求解。仿真结果表明:在孤岛微网中引入价格型需求响应能有效削减负荷峰谷差,经济效益显著。与粒子群优化算法相比,乌鸦搜素算法在收敛速度和全局寻优的能力上具有明显优势。
黄景光 +5 more
doaj
First, He Was Adam, and Then, She Was Eve
Sexuality, Gender &Policy, Volume 9, Issue 4, November 2026.ABSTRACT Trans* is an umbrella term that is used to describe people who identify with a gender that is different from their assigned sex at birth. There has been a marked increase in young people presenting to child and adolescent mental health services due to a lack of specialist gender clinics in the United Kingdom.
Corey Hartley +2 more
wiley +1 more source
Leveraging an Unhappiness Lens for Smarter Policies
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Traditional policy research has largely focused on enhancing happiness or well‐being, privileging positive outcomes as the primary metric of success. We argue that a systematic focus on the drivers of unhappiness—rather than solely on happiness—offers a complementary analytical framework that can uncover hidden societal deficits and broaden ...
Marine Coupaud +2 more
wiley +1 more source
基于VAR模型的入境旅游需求影响因素研究——以美国客源市场为例 [PDF]
, 2010 随着国际旅游业的迅速发展,入境旅游需求逐渐成为学术界研究的热点领域。在利用1980-2008年美国客源市场的相关数据,建立旅游需求与旅游价格、收入、替代价格等变量之间的向量自回归(VAr)模型后,经过grAngEr因果关系检验、脉冲响应函数和方差分解,可以发现美国对中国的旅游需求受到自身的波动、旅游价格、收入水平、替代价格以及特殊事件的影响,并且这种影响具有持续效应。旅游价格、收入水平、替代价格等对美国的旅游需求的影响程度存在差异。江门市哲学社会科学规划项目 ...
黄福才, 王纯阳
core
由于电力系统的负荷特性越来越多样化，峰谷差不断增大的情况对电网的安全稳定运行造成一定威胁。而需求响应是电力需求侧管理的一种有效手段，利用价格或者激励来改变用户的用电习惯从而达到改善峰谷差的目的。本文针对用电工程中峰谷差优化控制的问题进行研究，在此基础上介绍了需求响应的工作原理并提出了不同类型负荷的需求响应优化方案。首先建立了考虑用户响应情况的负荷模型；然后提出一种结合分时电价以及激励的需求响应方式；接着给出了利用改进粒子群算法求解最优峰谷差的方法。仿真分析表明这种方案可以很好地减小峰谷差 ...
洵 黄
core +1 more source
World Affairs, Volume 189, Issue 4, Winter 2026.ABSTRACT The move from unipolarity to a fluid and contested multipolar world order has significantly changed the way African nations form national security policy due to changes in the nature of the strategic environment of those states. Much of the literature has focused on how the actions of major world powers ‐ the United States, China and Russia ...
Chick Edmond +2 more
wiley +1 more source