As an essential part of the urban infrastructure,underground utility tunnels have a long service life,complex structural performance evolution and dynamic changes both inside and outside the tunnel.These combined fact...As an essential part of the urban infrastructure,underground utility tunnels have a long service life,complex structural performance evolution and dynamic changes both inside and outside the tunnel.These combined factors result in a wide variety of disaster risks during the operation and maintenance phase,which make risk management and control particularly challenging.This work first reviews three common representative disaster factors during the operation and maintenance period:settlement,earthquakes,and explosions.It summarizes the causes of disasters,key technologies,and research methods.Then,it delves into the research on the intelligent operation and maintenance architecture for utility tunnels.Additionally,it explores the data challenges,monitoring technologies,and management platform architectures faced during the operation and maintenance process.This work provides new research perspectives for the long-term,healthy,and sustainable development of utility tunnels,which serve as the underground arteries of cities.展开更多
Technology is one of the basic dimensions of literary criticism,but it is often ignored for multiple reasons.As digital technology intervenes in literary production,literary criticism is being approached through the t...Technology is one of the basic dimensions of literary criticism,but it is often ignored for multiple reasons.As digital technology intervenes in literary production,literary criticism is being approached through the technological dimension.Technology-Based literary criticism now transcends linguistic centrism,using digital technology as a means and method of literary criticism,and bringing technology to the center stage of literary criticism.Technology-Based literary criticism,which features an intersection of interpretive and empirical perspectives,triggers multiple transmutations of the subjects of literary criticism,and also enriches the connotations of literary texts.Tech criticism came from,and has evolved with the changes of literary criticism in the productive forces and the relations of production,which are driven by digital technology.What digital technology has opened up for literary criticism is a comprehensive field,where literary criticism is in a transboundary dynamic of "relational production." Therefore,we need to develop a sense of relation and a sense of systems to better interpret present-day literary criticism.展开更多
vip Editor Prof.Jianfeng Li Univ.of Electronic Science and Technology of China lijianfeng@uestc.edu.cn The mid-infrared spectral domain is critically important and has considerable significance to fundamental scienc...vip Editor Prof.Jianfeng Li Univ.of Electronic Science and Technology of China lijianfeng@uestc.edu.cn The mid-infrared spectral domain is critically important and has considerable significance to fundamental science and technological applications.展开更多
The U.S.-initiated trade war against China,now in its eighth year,has taken a new turn.On May 29,the U.S.Department of Commerce announced the suspension of exports to China of critical U.S.technologies including those...The U.S.-initiated trade war against China,now in its eighth year,has taken a new turn.On May 29,the U.S.Department of Commerce announced the suspension of exports to China of critical U.S.technologies including those related to jet engines used in the latter's domestically produced C919 passenger jet-the only in-service engine currently powering the aircraft.展开更多
The increasing use of tellurium(Te) in electronics and renewable energy technologies has elevated its environmental concentration,posing ecological and health risks.This study addresses the critical need for effective...The increasing use of tellurium(Te) in electronics and renewable energy technologies has elevated its environmental concentration,posing ecological and health risks.This study addresses the critical need for effective methods to speciate Te by focusing on its two primary redox states—tellurite(Te(Ⅳ)) and tellurate(Te(Ⅵ))—which differ in reactivity,mobility,and toxicity.Existing analytical methods for Te speciation are often limited in sensitivity and can't simultaneously determine both species.In response,we present a novel,rapid,practical,and highly sensitive approach for determining Te(Ⅳ) and Te(Ⅵ) using frontal chromatography coupled with inductively coupled plasma mass spectrometry(FC-ICP-MS).Multivariate optimization of chromatographic conditions,along with the exploitation of the "carbon effect" and careful isotope selection,yield detection limits of 1.0 ng/L for Te(Ⅳ) and 1.3 ng/L for Te(Ⅵ) with a total analysis time of five minutes.Acidification with nitric acid is the only sample pretreatment required.Applied to natural waters,sediments,and soils,the method demonstrates high accuracy,superior sensitivity,greenness,and practicality,compared to state-of-the-art methodologies,offering an alternative and advantageous solution for routine Te speciation analysis across various environmental compartments.展开更多
基金financially supported by the Scientific Research Projects of the Education Department of Zhejiang Province(Grant No.Y202454744)the Ningbo Public Welfare Science and Technology Project(Grant Nos.2023S007 and 2023S165)the Key Research and Development Program of Zhejiang(Grant No.2023C03183).
文摘As an essential part of the urban infrastructure,underground utility tunnels have a long service life,complex structural performance evolution and dynamic changes both inside and outside the tunnel.These combined factors result in a wide variety of disaster risks during the operation and maintenance phase,which make risk management and control particularly challenging.This work first reviews three common representative disaster factors during the operation and maintenance period:settlement,earthquakes,and explosions.It summarizes the causes of disasters,key technologies,and research methods.Then,it delves into the research on the intelligent operation and maintenance architecture for utility tunnels.Additionally,it explores the data challenges,monitoring technologies,and management platform architectures faced during the operation and maintenance process.This work provides new research perspectives for the long-term,healthy,and sustainable development of utility tunnels,which serve as the underground arteries of cities.
基金a staged research result of “Digital Technology and the Paradigm Shift of Contemporary Chinese Literary and Art Criticism”(M21JC059)a program funded by Hangzhou Municipal Plan for Philosophy and Social Sciences。
文摘Technology is one of the basic dimensions of literary criticism,but it is often ignored for multiple reasons.As digital technology intervenes in literary production,literary criticism is being approached through the technological dimension.Technology-Based literary criticism now transcends linguistic centrism,using digital technology as a means and method of literary criticism,and bringing technology to the center stage of literary criticism.Technology-Based literary criticism,which features an intersection of interpretive and empirical perspectives,triggers multiple transmutations of the subjects of literary criticism,and also enriches the connotations of literary texts.Tech criticism came from,and has evolved with the changes of literary criticism in the productive forces and the relations of production,which are driven by digital technology.What digital technology has opened up for literary criticism is a comprehensive field,where literary criticism is in a transboundary dynamic of "relational production." Therefore,we need to develop a sense of relation and a sense of systems to better interpret present-day literary criticism.
文摘vip Editor Prof.Jianfeng Li Univ.of Electronic Science and Technology of China lijianfeng@uestc.edu.cn The mid-infrared spectral domain is critically important and has considerable significance to fundamental science and technological applications.
文摘The U.S.-initiated trade war against China,now in its eighth year,has taken a new turn.On May 29,the U.S.Department of Commerce announced the suspension of exports to China of critical U.S.technologies including those related to jet engines used in the latter's domestically produced C919 passenger jet-the only in-service engine currently powering the aircraft.
基金Open access funding provided by Universitàdegli Studi dell'Insubria within the CRUI-CARE Agreement。
文摘The increasing use of tellurium(Te) in electronics and renewable energy technologies has elevated its environmental concentration,posing ecological and health risks.This study addresses the critical need for effective methods to speciate Te by focusing on its two primary redox states—tellurite(Te(Ⅳ)) and tellurate(Te(Ⅵ))—which differ in reactivity,mobility,and toxicity.Existing analytical methods for Te speciation are often limited in sensitivity and can't simultaneously determine both species.In response,we present a novel,rapid,practical,and highly sensitive approach for determining Te(Ⅳ) and Te(Ⅵ) using frontal chromatography coupled with inductively coupled plasma mass spectrometry(FC-ICP-MS).Multivariate optimization of chromatographic conditions,along with the exploitation of the "carbon effect" and careful isotope selection,yield detection limits of 1.0 ng/L for Te(Ⅳ) and 1.3 ng/L for Te(Ⅵ) with a total analysis time of five minutes.Acidification with nitric acid is the only sample pretreatment required.Applied to natural waters,sediments,and soils,the method demonstrates high accuracy,superior sensitivity,greenness,and practicality,compared to state-of-the-art methodologies,offering an alternative and advantageous solution for routine Te speciation analysis across various environmental compartments.
