The Permian basalts in the Central Asian Orogenic Belt(CAOB)are crucial for constraining the closure of the Paleo-Asian Ocean.However,the origin of these basalts is still under discussion.Here,we present comprehensive...The Permian basalts in the Central Asian Orogenic Belt(CAOB)are crucial for constraining the closure of the Paleo-Asian Ocean.However,the origin of these basalts is still under discussion.Here,we present comprehensive bulk-rock geochemical,Sr-Nd-Pb-Hf isotopic,and zircon U-Pb-Lu-Hf isotopic data of the Liuyuan basalts and coexisting gabbros,which are located in the Beishan Orogen in the southern CAOB,to constrain their emplacement setting and tectonic implications.Our new gabbro ages of ca.288–294 Ma are interpreted to represent the formation time of the Liuyuan basaltic belt.The Liuyuan basalts show MORB-like rare earth element(REE)patterns and bulk-rockε_(Hf)(t)andε_(Nd)(t)values of 11.0–15.4 and 4.6–9.2,respectively,suggesting an origination mainly from a depleted mantle source.However,positive Pb anomalies,Nb-Ta depletions,and high Th/Yb ratios as well as evolved Sr-Nd-Pb-Hf isotopic compositions of some samples indicate variable continental crustal contribution.According to the covariation of Pb anomalies(Pb^(*)=2×Pb_(N)/(Ce_(N)+Pr_(N)))with Sr-Nd-Pb-Hf isotopic compositions,we speculate that parent magma of the Liuyuan basalt was contaminated by continental crustal materials during the eruption rather than having been generated from an enriched mantle source.As revealed by mixing modelling,the Liuyuan basaltic magmas would require a minor(<10%)upper continental crustal assimilation to explain the enriched trace elemental and radiogenic Sr-Nd-Pb-Hf isotopic signatures.Consequently,the Liuyuan basaltic belt is believed to have been generated in a continental extensional environment instead of an oceanic setting and does not constitute a Permian ophiolitic suture zone as previously suggested,since the Paleo-Asian Ocean was already closed in the southern Beishan Orogen in the Early Permian.展开更多
目的对2019版《中国癌症症状管理实践指南》(以下简称“指南”)中的化疗相关恶心呕吐(chemotherapy-induced nausea and vomiting,CINV)部分进行更新。方法本次更新工作于2024年8月-2025年8月开展,严格遵循国际指南更新规范与WHO指南制...目的对2019版《中国癌症症状管理实践指南》(以下简称“指南”)中的化疗相关恶心呕吐(chemotherapy-induced nausea and vomiting,CINV)部分进行更新。方法本次更新工作于2024年8月-2025年8月开展,严格遵循国际指南更新规范与WHO指南制定方法学。通过系统检索专业数据库及指南网站,全面收集癌症患者CINV管理的最佳证据。采用推荐分级的评估、制定与评价方法(grading of recommendations assessment,development and evaluation,GRADE)对证据质量进行分级,并据此形成推荐意见。最终推荐意见经由专家共识审议确定。结果更新版指南共新增6条推荐意见、修改7条推荐意见,更新后共包括31条推荐意见,涉及饮食指导、中医适宜技术(灸法、耳穴埋豆、穴位按压、子午流注时辰护理)、非药物管理(电针、针刺疗法、芳香疗法、瑜伽、音乐疗法、引导意象训练、渐进性肌肉放松训练)及药物治疗(姜类制剂等)。结论本次指南更新整合了当前关于癌症患者CINV症状管理的最新研究证据,旨在为国内临床医护人员及癌症患者提供科学、实用的循证实践参考。指南的实施有望推动CINV管理的规范化进程,进一步提升症状控制水平与临床护理质量。展开更多
Inclusive green growth(IGG)is a crucial pathway to high-quality economic development,with standardization serving as a key enabler.Standardization plays a critical role in reducing coordination costs and improving res...Inclusive green growth(IGG)is a crucial pathway to high-quality economic development,with standardization serving as a key enabler.Standardization plays a critical role in reducing coordination costs and improving resource allocation efficiency by facilitating rule harmonization,factor integration,and collaborative governance.Examining IGG from a standardization perspective helps clarify the mechanisms through which economic,environmental,and social objectives can be jointly realized,and offers new insights into the institutionalized and sustainable pursuit of multiple development goals.However,how standardization promotes IGG by coordinating economic growth,environmental performance,and social equity remains insufficiently explored in the existing literature.Using panel data from 283 prefecture-level Chinese cities(2012-2021),this study treats the comprehensive standardization reform pilot as a quasi-natural experiment and applies a double machine-learning framework to test whether standardization promotes IGG.The analysis further explores the mediating roles of technological innovation,green finance,and employment quality,and examines heterogeneity across geographic location,resource endowment,industrial base,and city hierarchy.It also evaluates the regional coordination effects of standardization.Results show that standardization significantly advances IGG,though its impact varies by regional and structural characteristics.Standardization enhances IGG by strengthening innovation,expanding green finance,and improving job quality.Moreover,it helps bridge geographic divides,narrow interregional disparities,and enhance coordination.These findings offer empirical evidence for policymakers to design targeted standardization strategies that support sustainable and equitable urban development.展开更多
基金co-supported by the National Natural Science Foundation of China(No.41922021)the MOST Special Fund from the State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences(No.MSFGPMR01-03)。
文摘The Permian basalts in the Central Asian Orogenic Belt(CAOB)are crucial for constraining the closure of the Paleo-Asian Ocean.However,the origin of these basalts is still under discussion.Here,we present comprehensive bulk-rock geochemical,Sr-Nd-Pb-Hf isotopic,and zircon U-Pb-Lu-Hf isotopic data of the Liuyuan basalts and coexisting gabbros,which are located in the Beishan Orogen in the southern CAOB,to constrain their emplacement setting and tectonic implications.Our new gabbro ages of ca.288–294 Ma are interpreted to represent the formation time of the Liuyuan basaltic belt.The Liuyuan basalts show MORB-like rare earth element(REE)patterns and bulk-rockε_(Hf)(t)andε_(Nd)(t)values of 11.0–15.4 and 4.6–9.2,respectively,suggesting an origination mainly from a depleted mantle source.However,positive Pb anomalies,Nb-Ta depletions,and high Th/Yb ratios as well as evolved Sr-Nd-Pb-Hf isotopic compositions of some samples indicate variable continental crustal contribution.According to the covariation of Pb anomalies(Pb^(*)=2×Pb_(N)/(Ce_(N)+Pr_(N)))with Sr-Nd-Pb-Hf isotopic compositions,we speculate that parent magma of the Liuyuan basalt was contaminated by continental crustal materials during the eruption rather than having been generated from an enriched mantle source.As revealed by mixing modelling,the Liuyuan basaltic magmas would require a minor(<10%)upper continental crustal assimilation to explain the enriched trace elemental and radiogenic Sr-Nd-Pb-Hf isotopic signatures.Consequently,the Liuyuan basaltic belt is believed to have been generated in a continental extensional environment instead of an oceanic setting and does not constitute a Permian ophiolitic suture zone as previously suggested,since the Paleo-Asian Ocean was already closed in the southern Beishan Orogen in the Early Permian.
文摘目的对2019版《中国癌症症状管理实践指南》(以下简称“指南”)中的化疗相关恶心呕吐(chemotherapy-induced nausea and vomiting,CINV)部分进行更新。方法本次更新工作于2024年8月-2025年8月开展,严格遵循国际指南更新规范与WHO指南制定方法学。通过系统检索专业数据库及指南网站,全面收集癌症患者CINV管理的最佳证据。采用推荐分级的评估、制定与评价方法(grading of recommendations assessment,development and evaluation,GRADE)对证据质量进行分级,并据此形成推荐意见。最终推荐意见经由专家共识审议确定。结果更新版指南共新增6条推荐意见、修改7条推荐意见,更新后共包括31条推荐意见,涉及饮食指导、中医适宜技术(灸法、耳穴埋豆、穴位按压、子午流注时辰护理)、非药物管理(电针、针刺疗法、芳香疗法、瑜伽、音乐疗法、引导意象训练、渐进性肌肉放松训练)及药物治疗(姜类制剂等)。结论本次指南更新整合了当前关于癌症患者CINV症状管理的最新研究证据,旨在为国内临床医护人员及癌症患者提供科学、实用的循证实践参考。指南的实施有望推动CINV管理的规范化进程,进一步提升症状控制水平与临床护理质量。
基金supported by the National Social Science Fund of China“Research on the Ecological Symbiotic Development and Dynamic Governance of Manufacturing Entrepreneurship Platform”[Grant No.22BGL048].
文摘Inclusive green growth(IGG)is a crucial pathway to high-quality economic development,with standardization serving as a key enabler.Standardization plays a critical role in reducing coordination costs and improving resource allocation efficiency by facilitating rule harmonization,factor integration,and collaborative governance.Examining IGG from a standardization perspective helps clarify the mechanisms through which economic,environmental,and social objectives can be jointly realized,and offers new insights into the institutionalized and sustainable pursuit of multiple development goals.However,how standardization promotes IGG by coordinating economic growth,environmental performance,and social equity remains insufficiently explored in the existing literature.Using panel data from 283 prefecture-level Chinese cities(2012-2021),this study treats the comprehensive standardization reform pilot as a quasi-natural experiment and applies a double machine-learning framework to test whether standardization promotes IGG.The analysis further explores the mediating roles of technological innovation,green finance,and employment quality,and examines heterogeneity across geographic location,resource endowment,industrial base,and city hierarchy.It also evaluates the regional coordination effects of standardization.Results show that standardization significantly advances IGG,though its impact varies by regional and structural characteristics.Standardization enhances IGG by strengthening innovation,expanding green finance,and improving job quality.Moreover,it helps bridge geographic divides,narrow interregional disparities,and enhance coordination.These findings offer empirical evidence for policymakers to design targeted standardization strategies that support sustainable and equitable urban development.
