River ethics,a significant advancement inspired by Chinese President XI Jinping's ecological civilization thought,embodies the philosophical essence of river governance and represents a legacy of innovation by gen...River ethics,a significant advancement inspired by Chinese President XI Jinping's ecological civilization thought,embodies the philosophical essence of river governance and represents a legacy of innovation by generations of water resources professionals.Rooted in river ecology,it offers a framework for advancing modern water governance systems and capabilities.This paper examines eight dimensions of river ethics to provide actionable recommendations:enhancing knowledge systems on water,rivers,and lakes;addressing critical challenges in water governance to strengthen the foundational role of water authorities in ensuring water security,resource management,ecological sustainability and environmental protection;optimizing water project planning to mitigate ecological impacts;ensuring high standards in the lifecycle management of water projects;refining water diversion strategies for precise scheduling;utilizing ecosystem complexity for river and lake restoration;implementing tiered management of water-related disasters;and driving reforms to modernize water governance systems and mechanisms.展开更多
研究旨在通过Meta分析评估植物多糖对羊生长性能的影响。检索2000年1月至2023年12月在中国知网、维普、万方、Web of Science和PubMed数据库中收录的关于植物多糖对羊生长性能影响的相关文章。筛选出26篇随机对照试验文章,重点研究植物...研究旨在通过Meta分析评估植物多糖对羊生长性能的影响。检索2000年1月至2023年12月在中国知网、维普、万方、Web of Science和PubMed数据库中收录的关于植物多糖对羊生长性能影响的相关文章。筛选出26篇随机对照试验文章,重点研究植物多糖对羊生长性能相关指标的Meta分析。结果显示,在饲粮中添加植物多糖能够显著提升羊的平均日增重(ADG)和平均日采食量(ADFI)(P<0.05),显著降低料重比(F/G)(P<0.05)。亚组分析结果显示,饲喂时长和植物多糖添加量均显著影响羊的ADG和F/G(P<0.05);当植物多糖添加量≤1 g/kg时,可以显著提高羊的ADFI(P<0.05),而当植物多糖添加量超过1 g/kg时,对羊的ADFI无显著差异(P>0.05)。研究表明,在饲粮中添加植物多糖对羊的生长性能具有明显的改善作用。展开更多
研究旨在全面分析近30年国际草食家畜智慧养殖相关研究发展现状和前沿热点,并提供可视化数据支撑。研究以Web of Science (WOS)核心数据集收录的发表于1996—2023年草食家畜智慧养殖相关文献为研究对象,应用CiteSpace (6.3.R1)对文献发...研究旨在全面分析近30年国际草食家畜智慧养殖相关研究发展现状和前沿热点,并提供可视化数据支撑。研究以Web of Science (WOS)核心数据集收录的发表于1996—2023年草食家畜智慧养殖相关文献为研究对象,应用CiteSpace (6.3.R1)对文献发表数量随年度变化趋势,以及国家、研究机构、期刊、关键词被引量进行共现分析、聚类分析、突现分析和可视化表达。结果显示:共获得草食家畜智慧化养殖相关英文文献276篇。近30年该研究领域文献发表数量整体呈上升趋势;研究机构主要以印度农业研究理事会、西班牙最高科研理事会和中国农业大学等为代表;国际主流学术期刊以Animal Feed Science and Technology、Journal of Animal Science和Journal of Dairy Science等为代表。草食家畜智慧畜牧业的主要研究方向为精准畜牧业、大数据、人工智能、计算机建模和智慧化管理等方面。研究表明,进一步加强畜牧智能装备研发,制造畜牧专用人工智能芯片,打造立体智慧畜牧云平台是目前和今后该领域的热点研究方向。展开更多
Signatures of superconductivity near 80 K have recently been discovered in single crystals of La_(3)Ni_(2)O_(7)under pressure,which makes it a new candidate for high-temperature superconductors dominated by 3d transit...Signatures of superconductivity near 80 K have recently been discovered in single crystals of La_(3)Ni_(2)O_(7)under pressure,which makes it a new candidate for high-temperature superconductors dominated by 3d transition elements,following the cuprate and iron-pnictide superconductors.However,there are several critical questions that have been perplexing the scientificommunity:(1)What factors contribute to the inconsistent reproducibility of the experimental results?(2)What is the fundamental nature of pressure-induced superconductivity:bulk or nonbulk(filamentary-like)(3)Where is the superconducting phase located within the sample if it is filamentary-like(4)Is the oxygen content important for the development and stabilization of superconductivity?In this study,we employ comprehensive high-pressure techniques to address these questions.Through our modulated ac susceptibility measurements,we are the firs to fin that the superconductivity in this nickelate is filamentary-like Our scanning transmission electron microscopy investigations suggest that the filamentary-lik superconductivity most likely emerges at the interface between La_(3)Ni_(2)O_(7)and La_(4)Ni_(3)O_(10)phases.By tuning the oxygen content of polycrystalline La_(3)Ni_(2)O_(7),we also fin that it plays vital role in the development and stabilization of superconductivity in this material.The upper and lower bounds on the oxygen content are 7.35 and 6.89,respectively.Our results provide not only new insights into the puzzling issues regarding this material,but also significan information that will enable a better understanding of its superconductivity.展开更多
基金Three Gorges Follow-up Work Fund,Grant/Award Number:WE0161A042024National Key Research Program of China,Grant/Award Number:2024YFC3210900。
文摘River ethics,a significant advancement inspired by Chinese President XI Jinping's ecological civilization thought,embodies the philosophical essence of river governance and represents a legacy of innovation by generations of water resources professionals.Rooted in river ecology,it offers a framework for advancing modern water governance systems and capabilities.This paper examines eight dimensions of river ethics to provide actionable recommendations:enhancing knowledge systems on water,rivers,and lakes;addressing critical challenges in water governance to strengthen the foundational role of water authorities in ensuring water security,resource management,ecological sustainability and environmental protection;optimizing water project planning to mitigate ecological impacts;ensuring high standards in the lifecycle management of water projects;refining water diversion strategies for precise scheduling;utilizing ecosystem complexity for river and lake restoration;implementing tiered management of water-related disasters;and driving reforms to modernize water governance systems and mechanisms.
文摘研究旨在通过Meta分析评估植物多糖对羊生长性能的影响。检索2000年1月至2023年12月在中国知网、维普、万方、Web of Science和PubMed数据库中收录的关于植物多糖对羊生长性能影响的相关文章。筛选出26篇随机对照试验文章,重点研究植物多糖对羊生长性能相关指标的Meta分析。结果显示,在饲粮中添加植物多糖能够显著提升羊的平均日增重(ADG)和平均日采食量(ADFI)(P<0.05),显著降低料重比(F/G)(P<0.05)。亚组分析结果显示,饲喂时长和植物多糖添加量均显著影响羊的ADG和F/G(P<0.05);当植物多糖添加量≤1 g/kg时,可以显著提高羊的ADFI(P<0.05),而当植物多糖添加量超过1 g/kg时,对羊的ADFI无显著差异(P>0.05)。研究表明,在饲粮中添加植物多糖对羊的生长性能具有明显的改善作用。
文摘研究旨在全面分析近30年国际草食家畜智慧养殖相关研究发展现状和前沿热点,并提供可视化数据支撑。研究以Web of Science (WOS)核心数据集收录的发表于1996—2023年草食家畜智慧养殖相关文献为研究对象,应用CiteSpace (6.3.R1)对文献发表数量随年度变化趋势,以及国家、研究机构、期刊、关键词被引量进行共现分析、聚类分析、突现分析和可视化表达。结果显示:共获得草食家畜智慧化养殖相关英文文献276篇。近30年该研究领域文献发表数量整体呈上升趋势;研究机构主要以印度农业研究理事会、西班牙最高科研理事会和中国农业大学等为代表;国际主流学术期刊以Animal Feed Science and Technology、Journal of Animal Science和Journal of Dairy Science等为代表。草食家畜智慧畜牧业的主要研究方向为精准畜牧业、大数据、人工智能、计算机建模和智慧化管理等方面。研究表明,进一步加强畜牧智能装备研发,制造畜牧专用人工智能芯片,打造立体智慧畜牧云平台是目前和今后该领域的热点研究方向。
基金supported by the National Key Research and Development Program of China(Grant Nos.2022YFA1403900 and 2021YFA1401800)the NSF of China(Grant Nos.U2032214,12122414,12104487,and 12004419)+2 种基金the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB25000000)support from the Youth Innovation Promotion Association of the CAS(2019008)supported by the Synergetic Extreme Condition User Facility(SECUF)。
文摘Signatures of superconductivity near 80 K have recently been discovered in single crystals of La_(3)Ni_(2)O_(7)under pressure,which makes it a new candidate for high-temperature superconductors dominated by 3d transition elements,following the cuprate and iron-pnictide superconductors.However,there are several critical questions that have been perplexing the scientificommunity:(1)What factors contribute to the inconsistent reproducibility of the experimental results?(2)What is the fundamental nature of pressure-induced superconductivity:bulk or nonbulk(filamentary-like)(3)Where is the superconducting phase located within the sample if it is filamentary-like(4)Is the oxygen content important for the development and stabilization of superconductivity?In this study,we employ comprehensive high-pressure techniques to address these questions.Through our modulated ac susceptibility measurements,we are the firs to fin that the superconductivity in this nickelate is filamentary-like Our scanning transmission electron microscopy investigations suggest that the filamentary-lik superconductivity most likely emerges at the interface between La_(3)Ni_(2)O_(7)and La_(4)Ni_(3)O_(10)phases.By tuning the oxygen content of polycrystalline La_(3)Ni_(2)O_(7),we also fin that it plays vital role in the development and stabilization of superconductivity in this material.The upper and lower bounds on the oxygen content are 7.35 and 6.89,respectively.Our results provide not only new insights into the puzzling issues regarding this material,but also significan information that will enable a better understanding of its superconductivity.
