Results 41 to 50 of about 15,863 (217)
Innovating Public Food Procurement: A Case Study of Dordogne's Path to Sustainability
Review of Policy Research, EarlyView.ABSTRACT This study examines how an innovative mix of policy instruments can drive sustainable public food procurement (SPFP) in public institutions. Using the Dordogne Department in France as a case study, it explores the role of governance, capacity‐building, stakeholder collaboration, digitalization, and cost management in transforming school food ...
Paola Vola +5 more
wiley +1 more source
Verification and Reduction of Web Service Composition Based on Petri-Net [PDF]
, 2005 近年来Web服务的理论和技术取得了长足的发展,其保证互操作性的协议栈下层在学术界和工业界已基本达成一致.然而Web服务的价值在于服务重用,新兴的Web服务组合正是主要的重用手段。然而基于流程的Web服务组合建模是一个复杂且易出错的过程。如果流程定义在投入运行之后被发现有错，则修复错误的代价相当高，因此，在建模阶段进行有效的过程验证时十分必要的。此外Web服务组合可能存在不必要的流程设计而影响执行效率。本课题提出一个基于Petri网的Web服务组合验证及简化方法，此方法包含建模、验证、简化三个阶段 ...
刘笑锋
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Infant Mental Health Journal: Infancy and Early Childhood, Volume 46, Issue 4, Page 424-444, July 2025.Abstract Acknowledging that the parent–child attachment is a dyadic relationship, we investigated differences between pairs of parents and preschool children based on gender configurations in the association between attachment and problem behavior.
Magda Matetovici +4 more
wiley +1 more source
A Study on Risk Management of Currency Composition of China’s Foreign Exchange Reserves [PDF]
, 2011 新世纪以来，我国经济和外汇储备规模持续快速增长。截至2010年末，我国外汇储备余额为28473亿美元，远超日本、英国等传统的外汇储备主要持有国，外汇储备总规模居世界第一。然而，持续高速增长的外汇储备和长期以来我国的货币组合配置也带来了巨大的管理成本和风险。当前，美国次贷危机引发的全球经济危机阴霾尚未散去，欧洲主权债务危机继续蔓延，美元及其他主要国际储备货币存在着长期贬值预期。在此大环境下，对外汇储备的货币组合即币种结构的影响因素进行合理分析，对存在的风险进行合理有效的识别及管理 ...
宋君
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People and Nature, Volume 7, Issue 7, Page 1749-1768, July 2025.Abstract Social‐ecological systems (SES) are coupled systems formed by the intricate interactions between humans and nature. Our movement towards sustainable lifestyles requires a robust understanding of these interactions. Achieving a sustainable win‐win situation for both social and ecological systems, therefore, necessitates a sound scientific ...
Na Sa +6 more
wiley +1 more source
On Integrated Development Mode of Regional Tourism Resources [PDF]
, 2005 区域旅游整合开发是区域旅游开发的重要概念和方法，本文在前人研究的基础上，探讨了其中最为基础也最为重要的一个部分，即区域旅游资源的整合开发问题，重点研究不同的整合开发模式。本研究分为三个部分。第一部分为绪论，包括研究背景、研究意义、研究综述、研究思路与研究方法。本研究产生于中国旅游开发浪潮普遍高涨及探索区域旅游合作的背景下，为新形势下旅游开发提供一种新的思路和方法，并为完善旅游开发的理论体系做出贡献。本研究采用理论分析和个案研究相结合、材料分析和实践调研相结合、多学科交叉等研究方法 ...
黄俊毅
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New Phytologist, Volume 247, Issue 2, Page 504-517, July 2025.Summary Repetitive DNA is a feature of all organisms, ranging from archaea and plants to humans. DNA repeats can be seen both in coding and in noncoding regions of the genome. Due to the recurring nature of the sequences, simple DNA repeats tend to be more prone to errors during replication and repair, resulting in variability in their unit length ...
Sridevi Sureshkumar +3 more
wiley +1 more source
Poverty &Public Policy, Volume 17, Issue 2, June 2025.ABSTRACT To tackle lasting rural poverty and fully eradicate absolute poverty by 2020, the Chinese government introduced the “targeted poverty alleviation” (TPA) policy in 2013. Quantitative assessments prove the policy's success; yet multidimensional aspects and subjective perceptions of rural poverty are insufficiently accounted for.
Lisa Hoeschle, Shuang Liu, Xiaohua Yu
wiley +1 more source
Studies on Dynamic Substructure Method and Sensitivity Theory and Their Applications in Structural Analysis and Optimization [PDF]
, 2011 随着科学技术的发展和工艺水平的提高，机械产品开始向高速、高精度、高加工性能及自动化方向发展。为解决大型复杂机械产品结构的强度、精度、可靠性等一系列基本问题，结构的分析和优化成为学术和工程界研究的重要课题。一般说来，大型复杂结构的分析优化均会涉及计算可行性和结构设计变量对结构性能影响等方面的问题。 本文包含两方面的内容：1、研究动态子结构方法，并将其应用于装载机车架-油箱子结构当中，通过整体和局部分析在计算精度，计算时间上的比较，说明动态子结构法在作为整体的局部结构分析中的应用；2 ...
郑润昊
core
Jianzhu Gangjiegou Jinzhan, 2019 为了研究薄壁组合型箱体剪力墙-柱体系模拟预拼装,进行了某大型塔楼19层第9节柱和钢板剪力墙部分构件(共18根)的预拼装模拟。试验详细分析了预拼装方案的可行性及准确性,在此基础上结合钢结构安装顺序,构件主次关系和安装基准面,介绍了结构形式复杂的薄壁组合型预拼装模拟思路。研究结果表明,三维激光扫描仪可大幅提高测量自身精度,让控制点繁多的薄壁组合型实测模型与实测构件最大程度的接近;采用的预拼装模拟实现了薄壁组合型结构的检测过程及拟合结果可视化;预拼装模拟在薄壁组合型箱体剪力墙 ...
何敏杰 +4 more
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