This Special Topic of the Journal of Semiconductors(JOS)features expanded versions of key articles presented at the 2024 IEEE International Conference on Integrated Circuits Technologies and Applications(ICTA),which w...This Special Topic of the Journal of Semiconductors(JOS)features expanded versions of key articles presented at the 2024 IEEE International Conference on Integrated Circuits Technologies and Applications(ICTA),which was held in Hangzhou,Zhejiang,China,from October 25 to 27,2024.展开更多
In response to the problem of improving practical abilities of students in the process of cultivating innovative talents in the field of financial technology in the specialized software college,this paper analyzes the...In response to the problem of improving practical abilities of students in the process of cultivating innovative talents in the field of financial technology in the specialized software college,this paper analyzes the characteristics and applicability of problem-based learning(PBL)method,proposes a PBL course integration design scheme for the integration of business and technology in the field of financial technology,and provides corresponding course cases.The plan described in this article has been jointly demonstrated by experts from schools and enterprises and has received good feedback.展开更多
The integration of education,technology,and talent is a strategic institutional arrangement for China to build a high-quality education system and achieve innovation-driven development in the new era.As the main platf...The integration of education,technology,and talent is a strategic institutional arrangement for China to build a high-quality education system and achieve innovation-driven development in the new era.As the main platform for cultivating technical and skilled talents,vocational education faces dilemmas such as ambiguous role positioning,conflicting role expectations,and insufficient role capabilities when it comes to the coupling of the three functions of“education-technology-talent”.Based on the analytical framework of role theory and structural functionalism,this paper proposes three paths:clarifying role positioning through the integration of vocational and general education,reconstructing role expectations through the integration of science and education,and enhancing role capabilities through the integration of industry and education.These paths provide theoretical references and practical guidance for optimizing the function of vocational education in the collaborative innovation system.展开更多
Considering the development of potato （Solanum tuberosum） industry in China, the existing technologies of potato storage and transportation in the produc- ing area were analyzed through investigation on four main po...Considering the development of potato （Solanum tuberosum） industry in China, the existing technologies of potato storage and transportation in the produc- ing area were analyzed through investigation on four main potato production areas. Unear classification was used to conduct the technology classification. According to the technical attributes and characteristics, the potato technologies of storage and transportation in producing area were classified with large classes, middle classes, small classes and subclasses, into the agricultural production area processing and storage engineering technology system, to reveal the structure and functions. Mean- while, the widely used technologies were integrated and summarized into 5 principal technology integration programs, which could be used for the technology integration of the new management subjects such as planting professional cooperatives, family farms, enterprises and so on.展开更多
This paper reviews recent progress on integrated multi-chip modules composed of silica-based planar lightwave circuits (PLCs) with a relatively high core-to-cladding index contrast A. These compact and highly function...This paper reviews recent progress on integrated multi-chip modules composed of silica-based planar lightwave circuits (PLCs) with a relatively high core-to-cladding index contrast A. These compact and highly functional modules were fabricated by using the PLC-PLC direct attachment technique.展开更多
The network integration provides users with a new network with long connection time and a high data rate when needed, but it also brings the defects of all the networks that integrate together into the integrated netw...The network integration provides users with a new network with long connection time and a high data rate when needed, but it also brings the defects of all the networks that integrate together into the integrated network. This will cause all kinds of existing and some new security problems in the operation of the integrated network. A complete protection based on recovery is proposed in the paper. It uses the public-key algorithm to authorize and private-key algorithm to encrypt the communicating data. This solution can provide the system with reliable security, and avoid Denial of Service (DoS) of the user. This solution has been proposed lately, and we should further identify the correct action of all the layers and figure out how to react when a legal node is framed by multiple malicious nodes.展开更多
Objective:This study aims to assess nursing faculty’s perceptions and challenges in teaching Generation Z students,providing insights into the barriers and opportunities in bridging the generational learning gap.Mate...Objective:This study aims to assess nursing faculty’s perceptions and challenges in teaching Generation Z students,providing insights into the barriers and opportunities in bridging the generational learning gap.Material and Methods:A descriptive cross-sectional study was conducted among 335 nursing faculty members in the Delhi NCR region.Participants were recruited using a snowball sampling technique,and data were collected via a self-administered structured questionnaire.The questionnaire measured faculty perceptions and challenges using a Likert scale,with reliability assessed using Cronbach’s alpha.Data were analyzed through Descriptive and inferential statistics.Results:Findings revealed that while faculty recognize the need for technology integration and student-centered learning,they face challenges such as academic integrity concerns,psychological stress,and adapting to Gen Z’s expectations for personalized learning.The correlation between faculty perceptions and challenges was negligible(r=0.020,P=0.717),indicating that faculty perceptions remain stable despite these difficulties.Conclusion:Nursing faculty need to adapt pedagogical approaches to meet the evolving needs of Gen Z students.Bridging the gap between traditional teaching methods and the evolving needs of Generation Z requires faculty training,institutional support,and curriculum innovations.展开更多
In 2020,Shanghai and the provinces of Jiangsu,Zhejiang,and Anhui jointly issued the Specification for electronic certificate sharing and application,the first local standard in the field of government affairs in the Y...In 2020,Shanghai and the provinces of Jiangsu,Zhejiang,and Anhui jointly issued the Specification for electronic certificate sharing and application,the first local standard in the field of government affairs in the Yangtze River Delta region.The release and implementation of this standard have promoted the connectivity in government services,data and technological integration,accelerating the region’s coordinated and innovative development.展开更多
In the era of the digital economy,traditional supply chain finance models face challenges such as information fragmentation,inefficient processes,and insufficient credit transmission,necessitating digital transformati...In the era of the digital economy,traditional supply chain finance models face challenges such as information fragmentation,inefficient processes,and insufficient credit transmission,necessitating digital transformation.This study focuses on Kweichow Moutai Group,systematically analyzing its innovative practices in supply chain finance and examining the mechanisms through which digital technologies enhance core enterprise credit empowerment,improve supply chain collaboration efficiency,and optimize risk management.The research reveals that Moutai Group has transformed supply chain finance from unilateral credit granting to ecosystem-based credit sharing by establishing an IoT-enabled asset verification platform,developing smart contract-driven bill financing systems,and building a blockchain-based multi-party credit alliance.This model significantly lowers financing barriers for small and medium-sized suppliers while creating new value chain growth points through data assetization strategies.Finally,the study proposes further improvements from the perspectives of technical standardization and adaptive regulatory frameworks.展开更多
After a review on the conventional separation process of rare earths （RE）, hyperlink extraction technology was introduced and a potential process was proposed for clean separation of RE. A great amount of acid, base...After a review on the conventional separation process of rare earths （RE）, hyperlink extraction technology was introduced and a potential process was proposed for clean separation of RE. A great amount of acid, base and water was consumed in the con- ventional RE separation process which included the procedures of raw material dissolving, extraction separation and precipitation. Therefore hyperlink extraction technology had been developed, by which the repeated consumption of acid and base could be avoided during the extraction process. And based on the theory and successfid applications of the hyperlink extraction technology, we pro- posed the integral hyperlink process in which the intermediate acid resulted in individual procedures would be recycled and reused after being treated. The proposed process would make it feasible to consume no chemicals except for oxalic acid, and so could be a promising clean separation technology with a significant reduction on consumption and emission.展开更多
Urbanization strategic environmental assessment (SEA) is an effective instrument to enhance the harmo-nious development of urban complex system, integrating of environment and development in decision-making. Ur-baniza...Urbanization strategic environmental assessment (SEA) is an effective instrument to enhance the harmo-nious development of urban complex system, integrating of environment and development in decision-making. Ur-banization strategic environmental assessment integration technology system (SEA-ITS) is composed of "3S" (RS, GIS and GPS), environmental expert system and environmental model system, coupling with appropriate SEA working process closely. In this paper, the structure and components of SEA-ITS are analyzed based on Chinese characteristics, meanwhile methods to fulfill the following system functions are discussed: urbanization SEA in-quiring, analysis, discrimination, assessment, prediction, decision-making and output. Moreover, methods and tech-nologies employed in different urbanization SEA hierarchies are summarized. As a case study, urbanization SEA-ITS is applied in Changchun City to solving complex real problems. Methods such as system dynamics and grey cluster are adopted to achieve the environmental impact assessment on the eco-industrial system planning. It is revealed that the system designed is capable of reflecting the dynamic behavior of eco-industrial system under different sce-narios, meanwhile accomplishing strategy optimization and supplying scientific reference. The 4th strategy, namely concerning on economy increase and its interaction with science, technology and environment progress, would have the best efficiency. Further, more attention should be paid to the secondary development of integration techniques and function modification system of urbanization SEA-ITS.展开更多
An 8×10 GHz receiver optical sub-assembly （ROSA） consisting of an 8-channel arrayed waveguide grating （AWG） and an 8-channel PIN photodetector （PD） array is designed and fabricated based on silica hybrid in...An 8×10 GHz receiver optical sub-assembly （ROSA） consisting of an 8-channel arrayed waveguide grating （AWG） and an 8-channel PIN photodetector （PD） array is designed and fabricated based on silica hybrid integration technology. Multimode output waveguides in the silica AWG with 2% refractive index difference are used to obtain fiat-top spectra. The output waveguide facet is polished to 45° bevel to change the light propagation direction into the mesa-type PIN PD, which simplifies the packaging process. The experimentM results show that the single channel I dB bandwidth of AWG ranges from 2.12nm to 3.06nm, the ROSA responsivity ranges from 0.097 A/W to 0.158A/W, and the 3dB bandwidth is up to 11 GHz. It is promising to be applied in the eight-lane WDM transmission system in data center interconnection.展开更多
This study analyses the geological characteristics and development progress of unconventional gas in China,summarizes the development theories and technologies,discusses the prospects and challenges of unconventional ...This study analyses the geological characteristics and development progress of unconventional gas in China,summarizes the development theories and technologies,discusses the prospects and challenges of unconventional gas development,and puts forward the future trends of development technologies.Various technologies of unconventional gas development are available in China.Shale gas development technologies include comprehensive geological evaluation,volume fracturing of cluster horizontal wells under complex stress conditions,and factory-like operation of horizontal wells in complex mountainous area et al.Tight gas development technologies include fluid identification and quantitative prediction,optimization of well patterns,multi-layer fracturing in vertical well,staged fracturing in horizontal well,and drainage gas recovery.Coalbed methane(CBM)development technologies include the prediction of medium-high-and medium-low-rank CBM enrichment areas,rate-variable hydraulic fracturing,and quantitative drainage recovery with five stages,three pressures,and four controls.For economic and effective development of unconventional gas,further efforts should be made.First,intensified studies should be conducted on high-precision prediction and fine characterization technologies of high-quality shale reservoirs in deep marine,continental,and transitional facies.Second,key theories and technologies such as fast drilling and completion of wells with long laterals as well as large-scale volume fracturing should be developed to improve well productivity.Third,new technologies such as multiple well-type development,fluid injection,and nano-flooding should be developed to enhance the recovery.Fourth,effort should be made to identify the accumulation mechanism and large-scale effective development technologies for CBM.Fifth,the application of large amounts of data and artificial intelligence in the entire process of unconventional gas development should be considered to reduce the development cost.展开更多
The paper firstly introduces the conditions of NIS in America and Japan, then analyzes the condition and problems in NIS of China, and lastly illustrates the strategic meaning of Civil-military Integration NIS.
The capability of self-reliance integrated innovation is one of the key factors that influence steel enterprise' s core competitiveness.The main equipments of Baoteel UOE unit are from abroad,but the key consisten...The capability of self-reliance integrated innovation is one of the key factors that influence steel enterprise' s core competitiveness.The main equipments of Baoteel UOE unit are from abroad,but the key consistent pipe manufacturing technologies including iron making,steel making,heavy plates are self-reliance integrated.The self-reliance integrated innovation of Baosteel UOE unit has the features of high challenge, high efficiency,high starting point,consistent technologies etc.The independent innovation capacity achieved by adjusting measures to local conditions and periods in introducing projects is the key to the development of continuing robust.Baosteel longitudinal UOE submerged arc welding tube project practice also offer beneficial reference for independent of integration innovation.展开更多
Aero-engines,the core of air travel,rely on advanced high strength-toughness alloys(THSAs)such as titanium alloys,nickel-based superalloys,intermetallics,and ultra-high strength steel.The precision of cutting techniqu...Aero-engines,the core of air travel,rely on advanced high strength-toughness alloys(THSAs)such as titanium alloys,nickel-based superalloys,intermetallics,and ultra-high strength steel.The precision of cutting techniques is crucial for the manufacture of key components,including blades,discs,shafts,and gears.However,machining THSAs pose significant challenges,including high cutting forces and temperatures,which lead to rapid tool wear,reduced efficiency,and compromised surface integrity.This review thoroughly explores the current landscape and future directions of cutting techniques for THSAs in aero-engines.It examines the principles,mechanisms,and benefits of energy-assisted cutting technologies like laser-assisted machining and cryogenic cooling.The review assesses various tool preparation methods,their effects on tool performance,and strategies for precise shape and surface integrity control.It also outlines intelligent monitoring technologies for machining process status,covering aspects such as tool wear,surface roughness,and chatter,contributing to intelligent manufacturing.Additionally,it highlights emerging trends and potential future developments,including multi-energy assisted cutting mechanisms,advanced cutting tools,and collaborative control of structure shape and surface integrity,alongside intelligent monitoring software and hardware.This review serves as a reference for achieving efficient and high-quality manufacturing of THSAs in aero-engines.展开更多
Integrated geophysical technology is a necessary and effective means for geothermal exploration.However,integration of geophysical technology for large‐scale surveys with those for geothermal reservoir localization i...Integrated geophysical technology is a necessary and effective means for geothermal exploration.However,integration of geophysical technology for large‐scale surveys with those for geothermal reservoir localization is still in development.This study used the controlled source audio‐frequency magnetotelluric method technology for large‐scale exploration to obtain underground electrical structure information and micromotion detection technology to obtain underground wave velocity structure information.The combination of two detection technologies was used for local identification of geothermal reservoirs.Further,auxiliary correction and inversion constraint were implemented through the audio magnetotelluric sounding technology for maximum authenticity restoration of the near‐and transition‐field data.Through these technology improvements,a geothermal geological model was established for the Binhai County of Jiangsu Province in China and potential geothermal well locations were identified.On this basis,a geothermal well was drilled nearly 3000m deep,with a daily water volume of over 2000m3/day and a geothermal water temperature of 51°C at the well head.It is found that predictions using the above integrated geophysical exploration technology are in good agreement with the well geological formation data.This integrated geophysical technology can be effectively applied for geothermal exploration with high precision and reliability.展开更多
文摘This Special Topic of the Journal of Semiconductors(JOS)features expanded versions of key articles presented at the 2024 IEEE International Conference on Integrated Circuits Technologies and Applications(ICTA),which was held in Hangzhou,Zhejiang,China,from October 25 to 27,2024.
文摘In response to the problem of improving practical abilities of students in the process of cultivating innovative talents in the field of financial technology in the specialized software college,this paper analyzes the characteristics and applicability of problem-based learning(PBL)method,proposes a PBL course integration design scheme for the integration of business and technology in the field of financial technology,and provides corresponding course cases.The plan described in this article has been jointly demonstrated by experts from schools and enterprises and has received good feedback.
文摘The integration of education,technology,and talent is a strategic institutional arrangement for China to build a high-quality education system and achieve innovation-driven development in the new era.As the main platform for cultivating technical and skilled talents,vocational education faces dilemmas such as ambiguous role positioning,conflicting role expectations,and insufficient role capabilities when it comes to the coupling of the three functions of“education-technology-talent”.Based on the analytical framework of role theory and structural functionalism,this paper proposes three paths:clarifying role positioning through the integration of vocational and general education,reconstructing role expectations through the integration of science and education,and enhancing role capabilities through the integration of industry and education.These paths provide theoretical references and practical guidance for optimizing the function of vocational education in the collaborative innovation system.
基金Supported by the National Key Research and Development Program of China(2016YFD0401301)~~
文摘Considering the development of potato （Solanum tuberosum） industry in China, the existing technologies of potato storage and transportation in the produc- ing area were analyzed through investigation on four main potato production areas. Unear classification was used to conduct the technology classification. According to the technical attributes and characteristics, the potato technologies of storage and transportation in producing area were classified with large classes, middle classes, small classes and subclasses, into the agricultural production area processing and storage engineering technology system, to reveal the structure and functions. Mean- while, the widely used technologies were integrated and summarized into 5 principal technology integration programs, which could be used for the technology integration of the new management subjects such as planting professional cooperatives, family farms, enterprises and so on.
文摘This paper reviews recent progress on integrated multi-chip modules composed of silica-based planar lightwave circuits (PLCs) with a relatively high core-to-cladding index contrast A. These compact and highly functional modules were fabricated by using the PLC-PLC direct attachment technique.
文摘The network integration provides users with a new network with long connection time and a high data rate when needed, but it also brings the defects of all the networks that integrate together into the integrated network. This will cause all kinds of existing and some new security problems in the operation of the integrated network. A complete protection based on recovery is proposed in the paper. It uses the public-key algorithm to authorize and private-key algorithm to encrypt the communicating data. This solution can provide the system with reliable security, and avoid Denial of Service (DoS) of the user. This solution has been proposed lately, and we should further identify the correct action of all the layers and figure out how to react when a legal node is framed by multiple malicious nodes.
文摘Objective:This study aims to assess nursing faculty’s perceptions and challenges in teaching Generation Z students,providing insights into the barriers and opportunities in bridging the generational learning gap.Material and Methods:A descriptive cross-sectional study was conducted among 335 nursing faculty members in the Delhi NCR region.Participants were recruited using a snowball sampling technique,and data were collected via a self-administered structured questionnaire.The questionnaire measured faculty perceptions and challenges using a Likert scale,with reliability assessed using Cronbach’s alpha.Data were analyzed through Descriptive and inferential statistics.Results:Findings revealed that while faculty recognize the need for technology integration and student-centered learning,they face challenges such as academic integrity concerns,psychological stress,and adapting to Gen Z’s expectations for personalized learning.The correlation between faculty perceptions and challenges was negligible(r=0.020,P=0.717),indicating that faculty perceptions remain stable despite these difficulties.Conclusion:Nursing faculty need to adapt pedagogical approaches to meet the evolving needs of Gen Z students.Bridging the gap between traditional teaching methods and the evolving needs of Generation Z requires faculty training,institutional support,and curriculum innovations.
文摘In 2020,Shanghai and the provinces of Jiangsu,Zhejiang,and Anhui jointly issued the Specification for electronic certificate sharing and application,the first local standard in the field of government affairs in the Yangtze River Delta region.The release and implementation of this standard have promoted the connectivity in government services,data and technological integration,accelerating the region’s coordinated and innovative development.
文摘In the era of the digital economy,traditional supply chain finance models face challenges such as information fragmentation,inefficient processes,and insufficient credit transmission,necessitating digital transformation.This study focuses on Kweichow Moutai Group,systematically analyzing its innovative practices in supply chain finance and examining the mechanisms through which digital technologies enhance core enterprise credit empowerment,improve supply chain collaboration efficiency,and optimize risk management.The research reveals that Moutai Group has transformed supply chain finance from unilateral credit granting to ecosystem-based credit sharing by establishing an IoT-enabled asset verification platform,developing smart contract-driven bill financing systems,and building a blockchain-based multi-party credit alliance.This model significantly lowers financing barriers for small and medium-sized suppliers while creating new value chain growth points through data assetization strategies.Finally,the study proposes further improvements from the perspectives of technical standardization and adaptive regulatory frameworks.
基金supported by the 863 Plan-National High Technology Research and Development Program of China (2010AA03A405)973 Program-Major Project of Chinese National Programs for Fundamental Research and Development (2012CBA01200)
文摘After a review on the conventional separation process of rare earths （RE）, hyperlink extraction technology was introduced and a potential process was proposed for clean separation of RE. A great amount of acid, base and water was consumed in the con- ventional RE separation process which included the procedures of raw material dissolving, extraction separation and precipitation. Therefore hyperlink extraction technology had been developed, by which the repeated consumption of acid and base could be avoided during the extraction process. And based on the theory and successfid applications of the hyperlink extraction technology, we pro- posed the integral hyperlink process in which the intermediate acid resulted in individual procedures would be recycled and reused after being treated. The proposed process would make it feasible to consume no chemicals except for oxalic acid, and so could be a promising clean separation technology with a significant reduction on consumption and emission.
基金Under the auspices of Major State Basic Research Development Program of China (973 Program) (No. 2005CB724207)
文摘Urbanization strategic environmental assessment (SEA) is an effective instrument to enhance the harmo-nious development of urban complex system, integrating of environment and development in decision-making. Ur-banization strategic environmental assessment integration technology system (SEA-ITS) is composed of "3S" (RS, GIS and GPS), environmental expert system and environmental model system, coupling with appropriate SEA working process closely. In this paper, the structure and components of SEA-ITS are analyzed based on Chinese characteristics, meanwhile methods to fulfill the following system functions are discussed: urbanization SEA in-quiring, analysis, discrimination, assessment, prediction, decision-making and output. Moreover, methods and tech-nologies employed in different urbanization SEA hierarchies are summarized. As a case study, urbanization SEA-ITS is applied in Changchun City to solving complex real problems. Methods such as system dynamics and grey cluster are adopted to achieve the environmental impact assessment on the eco-industrial system planning. It is revealed that the system designed is capable of reflecting the dynamic behavior of eco-industrial system under different sce-narios, meanwhile accomplishing strategy optimization and supplying scientific reference. The 4th strategy, namely concerning on economy increase and its interaction with science, technology and environment progress, would have the best efficiency. Further, more attention should be paid to the secondary development of integration techniques and function modification system of urbanization SEA-ITS.
基金Supported by the National High Technology Research and Development Program of China under Grant No 2015AA016902the National Natural Science Foundation of China under Grant Nos 61435013 and 61405188the K.C.Wong Education Foundation
文摘An 8×10 GHz receiver optical sub-assembly （ROSA） consisting of an 8-channel arrayed waveguide grating （AWG） and an 8-channel PIN photodetector （PD） array is designed and fabricated based on silica hybrid integration technology. Multimode output waveguides in the silica AWG with 2% refractive index difference are used to obtain fiat-top spectra. The output waveguide facet is polished to 45° bevel to change the light propagation direction into the mesa-type PIN PD, which simplifies the packaging process. The experimentM results show that the single channel I dB bandwidth of AWG ranges from 2.12nm to 3.06nm, the ROSA responsivity ranges from 0.097 A/W to 0.158A/W, and the 3dB bandwidth is up to 11 GHz. It is promising to be applied in the eight-lane WDM transmission system in data center interconnection.
文摘This study analyses the geological characteristics and development progress of unconventional gas in China,summarizes the development theories and technologies,discusses the prospects and challenges of unconventional gas development,and puts forward the future trends of development technologies.Various technologies of unconventional gas development are available in China.Shale gas development technologies include comprehensive geological evaluation,volume fracturing of cluster horizontal wells under complex stress conditions,and factory-like operation of horizontal wells in complex mountainous area et al.Tight gas development technologies include fluid identification and quantitative prediction,optimization of well patterns,multi-layer fracturing in vertical well,staged fracturing in horizontal well,and drainage gas recovery.Coalbed methane(CBM)development technologies include the prediction of medium-high-and medium-low-rank CBM enrichment areas,rate-variable hydraulic fracturing,and quantitative drainage recovery with five stages,three pressures,and four controls.For economic and effective development of unconventional gas,further efforts should be made.First,intensified studies should be conducted on high-precision prediction and fine characterization technologies of high-quality shale reservoirs in deep marine,continental,and transitional facies.Second,key theories and technologies such as fast drilling and completion of wells with long laterals as well as large-scale volume fracturing should be developed to improve well productivity.Third,new technologies such as multiple well-type development,fluid injection,and nano-flooding should be developed to enhance the recovery.Fourth,effort should be made to identify the accumulation mechanism and large-scale effective development technologies for CBM.Fifth,the application of large amounts of data and artificial intelligence in the entire process of unconventional gas development should be considered to reduce the development cost.
文摘The paper firstly introduces the conditions of NIS in America and Japan, then analyzes the condition and problems in NIS of China, and lastly illustrates the strategic meaning of Civil-military Integration NIS.
文摘The capability of self-reliance integrated innovation is one of the key factors that influence steel enterprise' s core competitiveness.The main equipments of Baoteel UOE unit are from abroad,but the key consistent pipe manufacturing technologies including iron making,steel making,heavy plates are self-reliance integrated.The self-reliance integrated innovation of Baosteel UOE unit has the features of high challenge, high efficiency,high starting point,consistent technologies etc.The independent innovation capacity achieved by adjusting measures to local conditions and periods in introducing projects is the key to the development of continuing robust.Baosteel longitudinal UOE submerged arc welding tube project practice also offer beneficial reference for independent of integration innovation.
基金National Natural Science Foundation of China(Nos.92160301,92060203,52175415,and 52205475)Science Center for Gas Turbine Project(No.P2023-B-IV-003-001)+1 种基金Natural Science Foundation of Jiangsu Province(No.BK20210295)Fundamental Research Funds for the Central Universities(Nos.NS2023028 and NG2024015)。
文摘Aero-engines,the core of air travel,rely on advanced high strength-toughness alloys(THSAs)such as titanium alloys,nickel-based superalloys,intermetallics,and ultra-high strength steel.The precision of cutting techniques is crucial for the manufacture of key components,including blades,discs,shafts,and gears.However,machining THSAs pose significant challenges,including high cutting forces and temperatures,which lead to rapid tool wear,reduced efficiency,and compromised surface integrity.This review thoroughly explores the current landscape and future directions of cutting techniques for THSAs in aero-engines.It examines the principles,mechanisms,and benefits of energy-assisted cutting technologies like laser-assisted machining and cryogenic cooling.The review assesses various tool preparation methods,their effects on tool performance,and strategies for precise shape and surface integrity control.It also outlines intelligent monitoring technologies for machining process status,covering aspects such as tool wear,surface roughness,and chatter,contributing to intelligent manufacturing.Additionally,it highlights emerging trends and potential future developments,including multi-energy assisted cutting mechanisms,advanced cutting tools,and collaborative control of structure shape and surface integrity,alongside intelligent monitoring software and hardware.This review serves as a reference for achieving efficient and high-quality manufacturing of THSAs in aero-engines.
基金Geological and Mineral Resources Survey of Metallogenic Belt in the Middle and Lower Reaches of Yangtze River,Grant/Award Number:1212011220540Jiangsu 1:50000 Dingsanwei,Kaishan Island,Yangqiao,Chenjiagang,New Huaihe Estuary,Xiangshui Estuary,Dayou,Xiaojie,DayuJian District,Grant/Award Numbers:Base[2012]02‐014‐009,Base[2013]01‐019‐002,Base[2014]01‐021‐003。
文摘Integrated geophysical technology is a necessary and effective means for geothermal exploration.However,integration of geophysical technology for large‐scale surveys with those for geothermal reservoir localization is still in development.This study used the controlled source audio‐frequency magnetotelluric method technology for large‐scale exploration to obtain underground electrical structure information and micromotion detection technology to obtain underground wave velocity structure information.The combination of two detection technologies was used for local identification of geothermal reservoirs.Further,auxiliary correction and inversion constraint were implemented through the audio magnetotelluric sounding technology for maximum authenticity restoration of the near‐and transition‐field data.Through these technology improvements,a geothermal geological model was established for the Binhai County of Jiangsu Province in China and potential geothermal well locations were identified.On this basis,a geothermal well was drilled nearly 3000m deep,with a daily water volume of over 2000m3/day and a geothermal water temperature of 51°C at the well head.It is found that predictions using the above integrated geophysical exploration technology are in good agreement with the well geological formation data.This integrated geophysical technology can be effectively applied for geothermal exploration with high precision and reliability.
