To keep up with the time,culture is integrated to large-scale construction project management in China,which will absolutely add more vitality into construction project management in our country.Engineering culture is...To keep up with the time,culture is integrated to large-scale construction project management in China,which will absolutely add more vitality into construction project management in our country.Engineering culture is an integration of project construction and engineering culture.However,engineering culture development enjoys its own particularity as a project is constructed once only within a limited period of time.This paper gives affirmative opinion that engineering culture development in large-scale projects backs project management on the basis of thorough investigation of engineering culture development in Sutong Bridge Project and after deepened analysis,proposes new thinking pattern of engineering culture development in large-scale projects in a systematic manner,including thorough understanding of the essence of engineering culture,principle and contents of engineering culture development as well as efficient method in respect of establishment and implementation of engineering culture,and therefore provides a standard reference and systematic thinking pattern for engineering culture development in future large-scale projects.展开更多
Analysis is given to energy sources home and abroad, the employed and customer market in oceanographic engineering and necessity of its development. Risk out of system is put forward just after marine industry into oc...Analysis is given to energy sources home and abroad, the employed and customer market in oceanographic engineering and necessity of its development. Risk out of system is put forward just after marine industry into oceanographic engineering market. It also metions several influencing factors including politics, finance and ocean engineering materials.展开更多
A proper infrastructure assessment in the contemporary engineering world has become very crucial due to the palpable resources challenges. Therefore, from the design, construction, operation and maintenance stages of ...A proper infrastructure assessment in the contemporary engineering world has become very crucial due to the palpable resources challenges. Therefore, from the design, construction, operation and maintenance stages of the built infrastructural systems; cognizance must be taken of the associated factors and their significance. In considering these indices, the experts will save lots of resources wastage thereby integrating new technologies into the full life cycle of the infrastructure. In this paper, two sets of building infrastructure professionals were assessed. These are the corporate building organization （CBO） and the Operators from two shopping malls within the UK. Thirty-four factors regarding the sustainable building infrastructure appraisal were identified through literature reviews. These characteristics were accordingly classified into two factors （group I and II） and a comparative analysis of their influence conducted. Priority rating of the factors assessment on building infrastructure was through structured, administered survey amongst professionals within these organizations. Information of this survey revealed that the experts maintained a strong concordance in rating these factors. As a result, the associated factors have relatively substantial degree of influence in this context. Further indications of the result in groups I and II are that the CBO experts have indicated the infrastructure size, planning and design as the key factors. Also, the type of building characteristic was among others as the top and bottom marked cases. Similarly, the Operators too have maintained that a proper infrastructure design should incorporate a good policy framework for efficient energy saving fixtures and conservation. Additionally, the installation of quality equipment promotes cost savings of the resources and a just-in-time maintenance of the infrastructure at large. The maintain as-we-go philosophy characteristic was not strongly encouraged in this case.展开更多
The past decade has seen the rapid development of green construction in many civil engineering. Green construction of civil engineering can play an important role in addressing the issue of reducing contamination. A c...The past decade has seen the rapid development of green construction in many civil engineering. Green construction of civil engineering can play an important role in addressing the issue of reducing contamination. A common strategy used to study green construction of civil engineering to decrease contamination, decrease waste of energy, and increase utilization ratio of resource. Evidence suggests that green construction of civil engineering is among the most important factors for saving energy. Along with this growth in development of green construction, however there is increasing concern over sustainable development. While green construction of civil engineering presents a promising direction, some of the essential prerequisites can be cumbersome to acquire and can restrict decrease contamination. Therefore the primary goal of this article is through rational use of green construction technology, decrease contamination of water resource, enhance manipulation of electric energy consumption.展开更多
Scaffold-free techniques in the developmental tissue engineering area are designed to mimic in vivo embryonic processes with the aim of biofabricating,in vitro,tissues with more authentic properties.Cell clusters call...Scaffold-free techniques in the developmental tissue engineering area are designed to mimic in vivo embryonic processes with the aim of biofabricating,in vitro,tissues with more authentic properties.Cell clusters called spheroids are the basis for scaffold-free tissue engineering.In this review,we explore the use of spheroids from adult mesenchymal stem/stromal cells as a model in the developmental engineering area in order to mimic the developmental stages of cartilage and bone tissues.Spheroids from adult mesenchymal stromal/stem cells lineages recapitulate crucial events in bone and cartilage formation during embryogenesis,and are capable of spontaneously fusing to other spheroids,making them ideal building blocks for bone and cartilage tissue engineering.Here,we discuss data from ours and other labs on the use of adipose stromal/stem cell spheroids in chondrogenesis and osteogenesis in vitro.Overall,recent studies support the notion that spheroids are ideal"building blocks"for tissue engineering by“bottom-up”approaches,which are based on tissue assembly by advanced techniques such as three-dimensional bioprinting.Further studies on the cellular and molecular mechanisms that orchestrate spheroid fusion are now crucial to support continued development of bottom-up tissue engineering approaches such as three-dimensional bioprinting.展开更多
To meet society’s needs for undergraduate students to have engineering skills and to develop students’ability to operate Linux and engage in network software development,this paper proposes the construction of a new...To meet society’s needs for undergraduate students to have engineering skills and to develop students’ability to operate Linux and engage in network software development,this paper proposes the construction of a new specialized course for network engineering major--Linux system and network programming.This paper analyzes the course’s advantages,presents the contents of this course,designs a series of teaching methods aimed at improving students’engineering ability,proposes a course assessment method that will encourage students to practice,lists the development requirements for an examination software designed for this course,and finally,presents the results of our practice in teaching this course.展开更多
The waste referred to includes solid waste and sludge. Solid waste is mainly from urban garbage and industrial waste. Sludge is from water treatment factories, paper mills, chemical factories, pharmaceutical factories...The waste referred to includes solid waste and sludge. Solid waste is mainly from urban garbage and industrial waste. Sludge is from water treatment factories, paper mills, chemical factories, pharmaceutical factories, rivers and lakes. The waste and sludge are very harmful to water organisms, human health and drinking water, and directly affect the environment. Sludge and waste also occupy large areas of land. There are several methods to treat waste and sludge, such as burial, chemical treatment and incineration. Incineration is more effective than the展开更多
The author puts forward a proposal for developing chemistry and chemical engineering of China’s salt lakes on the basis of an investigation into exploitation and utilization of salt lake resources all over the world....The author puts forward a proposal for developing chemistry and chemical engineering of China’s salt lakes on the basis of an investigation into exploitation and utilization of salt lake resources all over the world. It contains the subjects of setting up an engineering research center, mainly developing leading products, giving priority to the development of a chemical industry by using Qinghai salt lake resources, actively popularizing results, stressing basic research and systematic management.展开更多
Ideal periodontal regeneration requires the integration of alveolar bone,periodontal ligament,and cementum,along with Sharpey’s fibers for occlusal force resistance.However,physiological regeneration remains rare due...Ideal periodontal regeneration requires the integration of alveolar bone,periodontal ligament,and cementum,along with Sharpey’s fibers for occlusal force resistance.However,physiological regeneration remains rare due to its intricate structure,making clinical regeneration a challenge.Periodontal ligament stem cells(PDLSCs),first isolated in 2004,hold the key to multi-directional differentiation into cementoblasts,fibroblasts,and osteoblasts.While traditional therapies like guided tissue regeneration(GTR)aim to activate PDLSCs,clinical outcomes are inconsistent,suggesting the need for additional strategies to enhance PDLSCs’functions.Advancements in molecular biotechnology have introduced the use of recombinant growth factors for tissue regeneration.How-ever,maintaining their efficacy requires high doses,posing cost and safety issues.Multi-layered scaffolds combined with cell sheet technology offer new insights,but face production,ethical,and survival challenges.Immune regulation plays a crucial role in PDLSC-mediated regeneration.The concept of“coagulo-immunomo-dulation”has emerged,emphasizing the coupling of blood coagulation and immune responses for periodontal regeneration.Despite its potential,the clinical translation of immune-based strategies remains elusive.The“developmental engineering”approach,which mimics developmental events using embryonic-stage cells and microenvironments,shows promise.Our research group has made initial strides,indicating its potential as a viable solution for periodontal complex regeneration.However,further clinical trials and considerations are needed for successful clinical application.This review aims to summarize the strategic transitions in the development of periodontal regenerative materials and to propose prospective avenues for future development.展开更多
Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary...Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary field,in a timely manner.This field encompasses foundational plasma phenomena;low-temperature plasmas;magnetically confined plasmas;inertially confined plasmas;astrophysics and space plasmas;and interdisciplinary science of these;and the engineering and technology development and application from them.展开更多
Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdis ciplinar...Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdis ciplinary field,in a timely manner.This field encompasses foundational plasma phenomena;low-temperature plasmas;magnetically confined plasmas;inertially confined plasmas;astrophysics and space plasmas;and interdisciplinary science of these;and the engineering and technology development and application from them.PST is sponsored jointly by the Institute of Plasma Physics of the Chinese Academy of Sciences,and the Chinese Society of Theoretical and Applied Mechanics.The journal joined the Scienc e Citation Index in 2003,the Engineering Index in 2006,and became published online by IOP Publishing Ltd.in 2006.展开更多
Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary...Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary field,in a timely manner.This field encompasses foundational plasma phenomena;low-temperature plasmas;magnetically confined plasmas;inertially confined plasmas;astrophysics and space plasmas;and interdisciplinary science of these;and the engineering and technology development and application from them.展开更多
Tamarix plant is widely distributed in the arid areas of China for its great tolerance of draught, salt and alkali and attracts more attention by its strong capacity in windbreak and sand-fixations. “Tamarix dunes” ...Tamarix plant is widely distributed in the arid areas of China for its great tolerance of draught, salt and alkali and attracts more attention by its strong capacity in windbreak and sand-fixations. “Tamarix dunes” constitute special desert bio-landscape in arid area. During last several decades,Tamarix shrubs declined and “Tamarix dunes” were also severely destroyed due to the land exploitation and serious deforestation, etc. From the 1980s until now, the extending phenomenon ofTamarix shrubs caused by developmental projects such as building highway, railway was studied in the western dry area of China, including western section of Hexi Corridor of Gansu, railroads and highways around the two greatest basin in Xinjiang and interior regions in Gurbantonggut desert, through on-the-spot survey along the transportation lines and setting up sampling plots along the roads. It was found that large quantities ofTamarix plants grow in the catchment area of low-lying lands that were formed by bulldozer operation during road building period. The extension ofTamarix shrubs caused by engineering was similar to that of the other section of the area to some extent, but went beyond the original distribution. This extension is beneficial to the ecological restoration and re-vegetation of western region of China and plays an important role in control of the sandstorms and improvement of ecological environments. As a result, it is necessary to make a further study on the extending phenomenon ofTamarix shrubs and to seek approach to promote wider extension ofTamarix shrubs in suitable habitats. Key words Arid area - Tamarix - Development engineering - Vegetation extension CLC number S718.541 Document code A Article ID 1007-662X(2004)01-0045-04 Foundation Item: This study is supported by key projects of National Natural Science Foundation (39730100), National Foundation (30070640) and part of Project 973(G19990435).Biography: Huang Pei-You (1936-), Male, Professor in College of Life Science and Technology, Xinjiang University, Urumqi, 830046Responsible editor: Chai Ruihai展开更多
1 Introduction The Chinese Academy of Engineering(CAE)has published the annual reports of Engineering Fronts 2024[1-3].A multi round interaction method,involving iterative selection and judgment between experts and da...1 Introduction The Chinese Academy of Engineering(CAE)has published the annual reports of Engineering Fronts 2024[1-3].A multi round interaction method,involving iterative selection and judgment between experts and data,was adopted.Through the deep integration of expert review and data analysis,a total of 92 engineering research fronts and 92 engineering development fronts were selected.Among them,3 engineering research fronts and 3 engineering development fronts were identified in the field of Energy and Electrical Science and Technology.展开更多
This paper is focused on a higher-level report of a new generation of Unmanned Aerial Vehicle (UAV) technologies. Starting from the structural scalability of civil tiltrotors, design strategy and requirements for UAVs...This paper is focused on a higher-level report of a new generation of Unmanned Aerial Vehicle (UAV) technologies. Starting from the structural scalability of civil tiltrotors, design strategy and requirements for UAVs, and advanced composite materials, the increased speed and productivity requirements for tiltrotors have spawned several investigations associated with proprotor aero elastic stability augmentation and aerodynamic performance enhancements. The research emphasized the Large Civil Tilt Rotor as the configuration with the best potential to meet the technology goals, and the design, including the challenges of the Large Civil Tilt Rotor (LCTR). The design presented was economically competitive, with the potential for substantial impact on the air transportation system. The research includes some manufacturers of helicopters, drones and tiltrotors carrying out design studies and production of prototypes, as well as research projects aimed at designing, manufacturing, qualifying, and flight-testing the new wing of the Next-Generation Civil Tiltrotor Technology Demonstrator. Promises of Vertical Take-off and Landing (VTOL) aircraft, UAVs, Digitalization of Urban Air Mobility (UAM), and the “U-space” concept are discussed in the paper. The eight SUMP principles and possibilities of future advancements are emphasized.展开更多
Purpose:This study investigates the role of the engineering education environment created by the implementation of the“Plan for Educating and Training Outstanding Engineers”(PETOE)on the professional capability deve...Purpose:This study investigates the role of the engineering education environment created by the implementation of the“Plan for Educating and Training Outstanding Engineers”(PETOE)on the professional capability development of engineering students from the perspective of students'experience.Design/Approach/Methods:This study uses data from the National Engineering Student Survey and multiple regression analysis to explore the role of institutional resources and support,teaching reforms,and interpersonal interaction on the professional development of engineering students.Findings:The opportunities for on-campus practical activities provided by the institution,content of the teachers'teaching,teaching methods,comprehensive coursework assessment,and interpersonal interactions contributed to the development of students'engineering competencies,with limited contributions from research-based teaching methods.Internship opportunities and international exchange environments were negatively associated with the development of engineering skills in an“unexpected”manner.OriginalityNalue:Focusing on students'experiences of engineering education reform,this study comprehensively evaluates the implementation of the reform measures adopted under PETOE.Furthermore,it assesses how corresponding changes in the general educational environment relate to students’professional capability development.Thus,this study addresses an important research gap in educational reformthe lack of domestic empirical studies in China.展开更多
The rapid development of science and technology calls for an urgent need to systemize the studies in a certain field on the basis of a common target. A case in point was the research and development of atomic bombs th...The rapid development of science and technology calls for an urgent need to systemize the studies in a certain field on the basis of a common target. A case in point was the research and development of atomic bombs that was based on the latest development in many fields.展开更多
ITHACA, N.Y. -- Ray J. Wu, Cornell University professor of molecular biology and genetics, who was widely recog-nized as one of the fathers of genetic engineering and who developed and sought to feed the world with a ...ITHACA, N.Y. -- Ray J. Wu, Cornell University professor of molecular biology and genetics, who was widely recog-nized as one of the fathers of genetic engineering and who developed and sought to feed the world with a higher yield-ing rice that resists insects and drought, died of cardiac arrest in Ithaca, Feb. 10.展开更多
1. General situation of the auto engine sector 1.1 The economical operation During the recent years, series of measures have been taken by the Chinese government to ignite the national economy, which include: readjust...1. General situation of the auto engine sector 1.1 The economical operation During the recent years, series of measures have been taken by the Chinese government to ignite the national economy, which include: readjusting economic growth strate-gy from encouraging exports to boosting domestic demands; global-ly enlarging the infrastructural con-展开更多
Developing approaches for precise engineering of the optical response of plasmonic nanocavities at the postfabrication stage is important for achieving enhanced and tunable light-matter interactions.In this work,we de...Developing approaches for precise engineering of the optical response of plasmonic nanocavities at the postfabrication stage is important for achieving enhanced and tunable light-matter interactions.In this work,we demonstrate selective enhancement/suppression of specific plasmonic modes by embedding nanocube-on-mirror plasmonic nanocavities into a poly(methyl methacrylate)(PMMA)layer with a controllable thickness.With the increase of the PMMA thickness from 0 to approximately 100 nm,the dominating out-of-plane plasmonic modes are significantly suppressed in the scattering spectra,while the in-plane plasmonic modes are greatly enhanced with a factor reaching 102±20.This enhancement is related to the variation of momentum matching between the plasmonic modes and the radiative fields,affecting both mode excitation and emission properties.In addition,the spectral positions of the in-plane and out-of-plane plasmonic modes shift up to 52±5 and 81±2 nm,respectively.These properties are important for matching and enhancing plasmonic and molecular resonances in a variety of applications.展开更多
基金National Science and Technology Support Program(No.2006BAG04B06)
文摘To keep up with the time,culture is integrated to large-scale construction project management in China,which will absolutely add more vitality into construction project management in our country.Engineering culture is an integration of project construction and engineering culture.However,engineering culture development enjoys its own particularity as a project is constructed once only within a limited period of time.This paper gives affirmative opinion that engineering culture development in large-scale projects backs project management on the basis of thorough investigation of engineering culture development in Sutong Bridge Project and after deepened analysis,proposes new thinking pattern of engineering culture development in large-scale projects in a systematic manner,including thorough understanding of the essence of engineering culture,principle and contents of engineering culture development as well as efficient method in respect of establishment and implementation of engineering culture,and therefore provides a standard reference and systematic thinking pattern for engineering culture development in future large-scale projects.
文摘Analysis is given to energy sources home and abroad, the employed and customer market in oceanographic engineering and necessity of its development. Risk out of system is put forward just after marine industry into oceanographic engineering market. It also metions several influencing factors including politics, finance and ocean engineering materials.
文摘A proper infrastructure assessment in the contemporary engineering world has become very crucial due to the palpable resources challenges. Therefore, from the design, construction, operation and maintenance stages of the built infrastructural systems; cognizance must be taken of the associated factors and their significance. In considering these indices, the experts will save lots of resources wastage thereby integrating new technologies into the full life cycle of the infrastructure. In this paper, two sets of building infrastructure professionals were assessed. These are the corporate building organization （CBO） and the Operators from two shopping malls within the UK. Thirty-four factors regarding the sustainable building infrastructure appraisal were identified through literature reviews. These characteristics were accordingly classified into two factors （group I and II） and a comparative analysis of their influence conducted. Priority rating of the factors assessment on building infrastructure was through structured, administered survey amongst professionals within these organizations. Information of this survey revealed that the experts maintained a strong concordance in rating these factors. As a result, the associated factors have relatively substantial degree of influence in this context. Further indications of the result in groups I and II are that the CBO experts have indicated the infrastructure size, planning and design as the key factors. Also, the type of building characteristic was among others as the top and bottom marked cases. Similarly, the Operators too have maintained that a proper infrastructure design should incorporate a good policy framework for efficient energy saving fixtures and conservation. Additionally, the installation of quality equipment promotes cost savings of the resources and a just-in-time maintenance of the infrastructure at large. The maintain as-we-go philosophy characteristic was not strongly encouraged in this case.
文摘The past decade has seen the rapid development of green construction in many civil engineering. Green construction of civil engineering can play an important role in addressing the issue of reducing contamination. A common strategy used to study green construction of civil engineering to decrease contamination, decrease waste of energy, and increase utilization ratio of resource. Evidence suggests that green construction of civil engineering is among the most important factors for saving energy. Along with this growth in development of green construction, however there is increasing concern over sustainable development. While green construction of civil engineering presents a promising direction, some of the essential prerequisites can be cumbersome to acquire and can restrict decrease contamination. Therefore the primary goal of this article is through rational use of green construction technology, decrease contamination of water resource, enhance manipulation of electric energy consumption.
基金the Coordination for the Improvement of Higher Education Personnel(CAPES),No.88882.366181/2019-01the Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro(FAPERJ),No.E-26/202.682/2018National Council for Scientific and Technological Development(CNPq),No.467513/2014-7
文摘Scaffold-free techniques in the developmental tissue engineering area are designed to mimic in vivo embryonic processes with the aim of biofabricating,in vitro,tissues with more authentic properties.Cell clusters called spheroids are the basis for scaffold-free tissue engineering.In this review,we explore the use of spheroids from adult mesenchymal stem/stromal cells as a model in the developmental engineering area in order to mimic the developmental stages of cartilage and bone tissues.Spheroids from adult mesenchymal stromal/stem cells lineages recapitulate crucial events in bone and cartilage formation during embryogenesis,and are capable of spontaneously fusing to other spheroids,making them ideal building blocks for bone and cartilage tissue engineering.Here,we discuss data from ours and other labs on the use of adipose stromal/stem cell spheroids in chondrogenesis and osteogenesis in vitro.Overall,recent studies support the notion that spheroids are ideal"building blocks"for tissue engineering by“bottom-up”approaches,which are based on tissue assembly by advanced techniques such as three-dimensional bioprinting.Further studies on the cellular and molecular mechanisms that orchestrate spheroid fusion are now crucial to support continued development of bottom-up tissue engineering approaches such as three-dimensional bioprinting.
基金supported by the Teaching Research and Reform Project of Qingdao University of Technology under Grant 2024-10335040。
文摘To meet society’s needs for undergraduate students to have engineering skills and to develop students’ability to operate Linux and engage in network software development,this paper proposes the construction of a new specialized course for network engineering major--Linux system and network programming.This paper analyzes the course’s advantages,presents the contents of this course,designs a series of teaching methods aimed at improving students’engineering ability,proposes a course assessment method that will encourage students to practice,lists the development requirements for an examination software designed for this course,and finally,presents the results of our practice in teaching this course.
文摘The waste referred to includes solid waste and sludge. Solid waste is mainly from urban garbage and industrial waste. Sludge is from water treatment factories, paper mills, chemical factories, pharmaceutical factories, rivers and lakes. The waste and sludge are very harmful to water organisms, human health and drinking water, and directly affect the environment. Sludge and waste also occupy large areas of land. There are several methods to treat waste and sludge, such as burial, chemical treatment and incineration. Incineration is more effective than the
文摘The author puts forward a proposal for developing chemistry and chemical engineering of China’s salt lakes on the basis of an investigation into exploitation and utilization of salt lake resources all over the world. It contains the subjects of setting up an engineering research center, mainly developing leading products, giving priority to the development of a chemical industry by using Qinghai salt lake resources, actively popularizing results, stressing basic research and systematic management.
基金financially funded by the National Key R&D Program of China(2022YFA1104400)National Natural Science Foundation of China(82071167,82201012)+2 种基金Science and Technology Program of Guangzhou,China(2023B03J1232)Guangzhou Basic and Applied Basic Research Foundation(2024A04J6323)Guangdong Basic and Applied Basic Research Foundation(2023A0505050138,2020A1515110180).
文摘Ideal periodontal regeneration requires the integration of alveolar bone,periodontal ligament,and cementum,along with Sharpey’s fibers for occlusal force resistance.However,physiological regeneration remains rare due to its intricate structure,making clinical regeneration a challenge.Periodontal ligament stem cells(PDLSCs),first isolated in 2004,hold the key to multi-directional differentiation into cementoblasts,fibroblasts,and osteoblasts.While traditional therapies like guided tissue regeneration(GTR)aim to activate PDLSCs,clinical outcomes are inconsistent,suggesting the need for additional strategies to enhance PDLSCs’functions.Advancements in molecular biotechnology have introduced the use of recombinant growth factors for tissue regeneration.How-ever,maintaining their efficacy requires high doses,posing cost and safety issues.Multi-layered scaffolds combined with cell sheet technology offer new insights,but face production,ethical,and survival challenges.Immune regulation plays a crucial role in PDLSC-mediated regeneration.The concept of“coagulo-immunomo-dulation”has emerged,emphasizing the coupling of blood coagulation and immune responses for periodontal regeneration.Despite its potential,the clinical translation of immune-based strategies remains elusive.The“developmental engineering”approach,which mimics developmental events using embryonic-stage cells and microenvironments,shows promise.Our research group has made initial strides,indicating its potential as a viable solution for periodontal complex regeneration.However,further clinical trials and considerations are needed for successful clinical application.This review aims to summarize the strategic transitions in the development of periodontal regenerative materials and to propose prospective avenues for future development.
文摘Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary field,in a timely manner.This field encompasses foundational plasma phenomena;low-temperature plasmas;magnetically confined plasmas;inertially confined plasmas;astrophysics and space plasmas;and interdisciplinary science of these;and the engineering and technology development and application from them.
文摘Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdis ciplinary field,in a timely manner.This field encompasses foundational plasma phenomena;low-temperature plasmas;magnetically confined plasmas;inertially confined plasmas;astrophysics and space plasmas;and interdisciplinary science of these;and the engineering and technology development and application from them.PST is sponsored jointly by the Institute of Plasma Physics of the Chinese Academy of Sciences,and the Chinese Society of Theoretical and Applied Mechanics.The journal joined the Scienc e Citation Index in 2003,the Engineering Index in 2006,and became published online by IOP Publishing Ltd.in 2006.
文摘Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary field,in a timely manner.This field encompasses foundational plasma phenomena;low-temperature plasmas;magnetically confined plasmas;inertially confined plasmas;astrophysics and space plasmas;and interdisciplinary science of these;and the engineering and technology development and application from them.
基金Key projects of National Natu-ral Science Foundation (39730100) National Foundation (30070640) and part of Project 973(G19990435).
文摘Tamarix plant is widely distributed in the arid areas of China for its great tolerance of draught, salt and alkali and attracts more attention by its strong capacity in windbreak and sand-fixations. “Tamarix dunes” constitute special desert bio-landscape in arid area. During last several decades,Tamarix shrubs declined and “Tamarix dunes” were also severely destroyed due to the land exploitation and serious deforestation, etc. From the 1980s until now, the extending phenomenon ofTamarix shrubs caused by developmental projects such as building highway, railway was studied in the western dry area of China, including western section of Hexi Corridor of Gansu, railroads and highways around the two greatest basin in Xinjiang and interior regions in Gurbantonggut desert, through on-the-spot survey along the transportation lines and setting up sampling plots along the roads. It was found that large quantities ofTamarix plants grow in the catchment area of low-lying lands that were formed by bulldozer operation during road building period. The extension ofTamarix shrubs caused by engineering was similar to that of the other section of the area to some extent, but went beyond the original distribution. This extension is beneficial to the ecological restoration and re-vegetation of western region of China and plays an important role in control of the sandstorms and improvement of ecological environments. As a result, it is necessary to make a further study on the extending phenomenon ofTamarix shrubs and to seek approach to promote wider extension ofTamarix shrubs in suitable habitats. Key words Arid area - Tamarix - Development engineering - Vegetation extension CLC number S718.541 Document code A Article ID 1007-662X(2004)01-0045-04 Foundation Item: This study is supported by key projects of National Natural Science Foundation (39730100), National Foundation (30070640) and part of Project 973(G19990435).Biography: Huang Pei-You (1936-), Male, Professor in College of Life Science and Technology, Xinjiang University, Urumqi, 830046Responsible editor: Chai Ruihai
基金supported by the project,“Strategic Consulting and Research of Global Engineering Fronts”of the CAE under the guidance and assistance from the project integration group.
文摘1 Introduction The Chinese Academy of Engineering(CAE)has published the annual reports of Engineering Fronts 2024[1-3].A multi round interaction method,involving iterative selection and judgment between experts and data,was adopted.Through the deep integration of expert review and data analysis,a total of 92 engineering research fronts and 92 engineering development fronts were selected.Among them,3 engineering research fronts and 3 engineering development fronts were identified in the field of Energy and Electrical Science and Technology.
文摘This paper is focused on a higher-level report of a new generation of Unmanned Aerial Vehicle (UAV) technologies. Starting from the structural scalability of civil tiltrotors, design strategy and requirements for UAVs, and advanced composite materials, the increased speed and productivity requirements for tiltrotors have spawned several investigations associated with proprotor aero elastic stability augmentation and aerodynamic performance enhancements. The research emphasized the Large Civil Tilt Rotor as the configuration with the best potential to meet the technology goals, and the design, including the challenges of the Large Civil Tilt Rotor (LCTR). The design presented was economically competitive, with the potential for substantial impact on the air transportation system. The research includes some manufacturers of helicopters, drones and tiltrotors carrying out design studies and production of prototypes, as well as research projects aimed at designing, manufacturing, qualifying, and flight-testing the new wing of the Next-Generation Civil Tiltrotor Technology Demonstrator. Promises of Vertical Take-off and Landing (VTOL) aircraft, UAVs, Digitalization of Urban Air Mobility (UAM), and the “U-space” concept are discussed in the paper. The eight SUMP principles and possibilities of future advancements are emphasized.
基金supported by the Consulting Project of Chinese Academy of Engineering:Research on cultivating multi-directional thinking of engineering students for the digital-intelligence era(grant number 2021-XY-47).
文摘Purpose:This study investigates the role of the engineering education environment created by the implementation of the“Plan for Educating and Training Outstanding Engineers”(PETOE)on the professional capability development of engineering students from the perspective of students'experience.Design/Approach/Methods:This study uses data from the National Engineering Student Survey and multiple regression analysis to explore the role of institutional resources and support,teaching reforms,and interpersonal interaction on the professional development of engineering students.Findings:The opportunities for on-campus practical activities provided by the institution,content of the teachers'teaching,teaching methods,comprehensive coursework assessment,and interpersonal interactions contributed to the development of students'engineering competencies,with limited contributions from research-based teaching methods.Internship opportunities and international exchange environments were negatively associated with the development of engineering skills in an“unexpected”manner.OriginalityNalue:Focusing on students'experiences of engineering education reform,this study comprehensively evaluates the implementation of the reform measures adopted under PETOE.Furthermore,it assesses how corresponding changes in the general educational environment relate to students’professional capability development.Thus,this study addresses an important research gap in educational reformthe lack of domestic empirical studies in China.
文摘The rapid development of science and technology calls for an urgent need to systemize the studies in a certain field on the basis of a common target. A case in point was the research and development of atomic bombs that was based on the latest development in many fields.
文摘ITHACA, N.Y. -- Ray J. Wu, Cornell University professor of molecular biology and genetics, who was widely recog-nized as one of the fathers of genetic engineering and who developed and sought to feed the world with a higher yield-ing rice that resists insects and drought, died of cardiac arrest in Ithaca, Feb. 10.
文摘1. General situation of the auto engine sector 1.1 The economical operation During the recent years, series of measures have been taken by the Chinese government to ignite the national economy, which include: readjusting economic growth strate-gy from encouraging exports to boosting domestic demands; global-ly enlarging the infrastructural con-
基金National Key Research and Development Program of China(2023YFB2806701)National Natural Science Foundation of China(92250305,62305293)+2 种基金Natural Science Foundation of Zhejiang Province(LR25F050001,LDT23F04015F05)Engineering and Physical Sciences Research Council(EP/W017075/1)New Cornerstone Science Foundation(NCI202216)。
文摘Developing approaches for precise engineering of the optical response of plasmonic nanocavities at the postfabrication stage is important for achieving enhanced and tunable light-matter interactions.In this work,we demonstrate selective enhancement/suppression of specific plasmonic modes by embedding nanocube-on-mirror plasmonic nanocavities into a poly(methyl methacrylate)(PMMA)layer with a controllable thickness.With the increase of the PMMA thickness from 0 to approximately 100 nm,the dominating out-of-plane plasmonic modes are significantly suppressed in the scattering spectra,while the in-plane plasmonic modes are greatly enhanced with a factor reaching 102±20.This enhancement is related to the variation of momentum matching between the plasmonic modes and the radiative fields,affecting both mode excitation and emission properties.In addition,the spectral positions of the in-plane and out-of-plane plasmonic modes shift up to 52±5 and 81±2 nm,respectively.These properties are important for matching and enhancing plasmonic and molecular resonances in a variety of applications.
