Results 41 to 50 of about 1,468,446 (165)

Infrastructure as Inherited Knowledge: Artificial Intelligence and the Governance of Long‐Life Infrastructure

open access: yesJournal of Critical Infrastructure Policy, Volume 8, Issue 1, Spring/Summer 2027.
ABSTRACT Epistemic orphaning, responsibility drift, loss of institutional memory, and non‐stationarity are not new problems in infrastructure governance—they have accompanied long‐life infrastructure throughout its history. What artificial intelligence changes is not the existence of these problems but their scale, opacity, and the structural ...
Priscilla P. Nelson
wiley   +1 more source

Radiographic identification and description of the equine middle conchal sinus (ethmoidal sinus): Implications for diagnosing middle conchal sinusitis

open access: yesEquine Veterinary Journal, Volume 58, Issue 6, Page 1627-1635, November 2026.
Abstract Background The middle conchal sinus (MCS) (ethmoidal sinus) remains one of the least understood equine paranasal compartments. Despite recognition of its involvement in sinonasal disease, disorders of the MCS often remain underdiagnosed in the absence of computed tomographic (CT) imaging due to limited anatomical understanding and challenges ...
J.‐B. Pavard   +3 more
wiley   +1 more source

大庆市城市经济系统可持续性评价

open access: yes, 2009
三角模型作为一种直观的平台能够很好地图解区域可持续综合发展状况及长期趋势。由于具有直观性和简明性,三角模型易于被不同层次的学者和政策制定者理解和应用。根据经济发展、资源-能源消耗及环境污染的相互关系,结合生态学表现,利用三角模型工具分析评估区域经济可持续发展状况和长期趋势。本文选择我国最大的石油资源型城市——大庆市作为典型案例。大庆市位于黑龙江省西部,下辖5个区和4个县,2006年全市土地总面积为2.1219万hm2,总人口269.3万。结果表明,大庆市经济系统可持续性状况不容乐观,"八五"、"九五 ...
张平宇, 苏飞
core  

基于LCA-EMA模型的污水处理技术综合评价方法构建

open access: yesGongye shui chuli
以某实际污水处理厂为研究对象,为克服单一视角评估污水处理技术环境影响的局限,构建了整合生命周期评价(LCA)与能值分析(EMA)的综合模型旨在更全面客观地评估污水处理技术的资源效率与环境可持续性。结果显示,污水处理过程中生物处理阶段是环境负荷的主要来源,贡献了83.06%的全球变暖潜势和72.46%的人体毒性潜力;污泥处理阶段则对水生生态系统毒性影响突出。系统高度依赖不可再生资源占比高达93.24%,其中电力投入占比71.50%是关键驱动因素;可持续性指数ESI为0.055,显示系统资源转化效率低 ...
曾凡哲, 孙嘉淇, 余艳艳
doaj   +4 more sources

黄河三角洲盐渍土可持续利用对策

open access: yesShuitu Baochi Xuebao, 2003
分析了黄河三角洲盐渍土可持续利用的限制性因素,并提出黄河三角洲盐渍土可持续利用的对策。盐渍土可持续利用的限制性因素为:淡水资源不足、土壤肥力低、土壤盐分含量偏高和生态环境脆弱。黄河三角洲盐渍土可持续利用的对策是:完善农田水利基本建设;采取水利工程措施、农业生产技术和生物措施,综合治理盐渍土;加强盐渍土综合利用的基础理论、技术方法研究;根据生态农业理论,统筹规划,用地与养地相结合,合理配置盐渍土的农、林、牧比例;完善盐渍土开发利用的政策法规。
李贻学 东野光亮 李新举
doaj  

From Policy Legitimization to Blame Avoidance—Discursive Strategies During Denmark's Mink Culling Crisis

open access: yesPolicy Studies Journal, Volume 54, Issue 4, November 2026.
ABSTRACT This paper examines how governments navigate policy legitimacy during crises through three distinct discursive processes: legitimization, delegitimization, and blame avoidance. Using a sequential mixed‐methods design, the study analyzes Denmark's decision to cull all mink during the COVID‐19 pandemic. The quantitative analysis of 947 newspaper
Olivier Rubin   +3 more
wiley   +1 more source

中国土地资源与可持续发展

open access: yes, 2007
本书是《中国可持续发展总纲》第5卷。本书从总论和区域分论两个层次上全面阐述了我国土地资源利用历史、现状和存在的问题,从土地资源的高效持续利用及土地资源与其他资源相配合共同支撑经济、社会可持续发展的角度,探讨了土地资源利用与可持续发展的关系,提出了土地资源可持续利用若干战略对策。全书分上、下两篇。上篇是中国土地资源与可持续发展总论,包括中国土地资源与可持续发展概论,耕地、园地、林地、草地、湿地(水域)、交通用地、居民点及工矿用地、未利用土地等土地资源8个一级类的利用与持续发展分论等13章。
成升魁
core  

连续管在注入头多种夹持方式下的受力分析

open access: yesShiyou jixie, 2011
连续管作业机在现场作业时,连续管在传送过程中受到的压紧力会使管体形成一定的椭圆度,影响了连续管的工作性能。研究了连续管在双向夹持、3向夹持和4向夹持等3种夹持状态下的受力和变形,并应用Pro/Mechanica对连续管的应力大小及分布进行了分析,计算了连续管的变形量,指出采用4向夹持方式连续管产生的椭圆度仅为0.26%,最大应力为330.3 MPa,远小于其他2种夹持方式,因此连续管的性能可以得到更大程度地发挥。
施志辉, 刘航, 许立
doaj  

From the Margins: Potential Coalitions in Centralized, High‐Capacity States

open access: yesPolicy Studies Journal, Volume 54, Issue 4, November 2026.
ABSTRACT The early stages of coalition formation remain an understudied area, particularly in centralized, high‐capacity political systems. Examining actor dynamics at this formative stage can reveal how coalitions form and how limited pluralism constrains their development.
Sreeja Nair, Yuhao Ba, Mohnish Kedia
wiley   +1 more source

生物可持续性科学计划与实施战略介绍

open access: yes, 2005
“生物可持续性”(bioSUSTAINAB ILITY)科学计划是生物多样性计划(D IVERSITAS)3个核心科学计划之一,是一个有关生物多样性的国际计划。bioSUSTAINAB ILITY有3个密切相关的研究焦点:①评价目前生物多样性保护和持续利用所采取的措施的有效性;②导致生物多样性丧失的社会、政治和经济驱动因子分析;③生物多样性保护与持续利用的社会选择和决策取向研究。介绍了bioSUSTAINAB ILITY的主要内容及其实施战略 ...
李延梅, 张志强, 巩 杰, 巩杰
core  

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