The thesis summarizes the connotation of rural tourism and divides it into six types,including rural sight-seeing,rural body-building activity,rural folk culture,rural experience of farm work,rural business affairs,an...The thesis summarizes the connotation of rural tourism and divides it into six types,including rural sight-seeing,rural body-building activity,rural folk culture,rural experience of farm work,rural business affairs,and study and development.It outlines the theory of sustainable development of rural tourism and points out that what sustainable development of tourism concerns is the coordination of ecology,economy,and society centering on human and nature.On the basis of introducing the connotation of modern agriculture,it divides modern agriculture into six types,including sightseeing agriculture,leisure agriculture,green agriculture,characteristic agriculture,factory agriculture,and three-dimensional agriculture.And by concluding,it obtains the combination model of modern agriculture and rural tourism.Based on the introduction of the above related theories,the thesis discusses the interaction and integration model of the sustainable development of modern agriculture and rural tourism.It emphatically analyzes the integration model of modern agriculture and rural tourism,including pastoral agriculture tourism model(sightseeing village,leisure farm,citizen farm),and science education tourism model(agricultural science and technology education base,tourism and leisure education agricultural park,children's,agricultural education base,agricultural exposition).Based on the interaction and integration relationship between modern agriculture and rural tourism,the thesis puts forward corresponding countermeasures so as to promote their positive development and realize the maximum of ecological,social and economic benefits.展开更多
Integration interval and decision threshold issues were investigated for improved transmitted reference pulse cluster(iTRPC-)ultra-wideband(UWB)systems. Our analysis shows that the bit error rate(BER)performance of iT...Integration interval and decision threshold issues were investigated for improved transmitted reference pulse cluster(iTRPC-)ultra-wideband(UWB)systems. Our analysis shows that the bit error rate(BER)performance of iTRPC-UWB systems can be significantly improved via integration interval determination(IID)and decision threshold optimization. For this purpose,two modifications can be made at the autocorrelation receiver as follows. Firstly,the IID processing is performed for autocorrelation operation to capture multi-path energy as much as possible. Secondly,adaptive decision threshold(ADT)instead of zero decision threshold(ZDT),is used as estimated optimal decision threshold for symbol detection. Performance of iTRPCUWB systems using IID and ADT was evaluated in realistic IEEE 802.15.4a UWB channel models and the simulation results demonstrated our theoretical analysis.展开更多
Three recent breakthroughs due to AI in arts and science serve as motivation:An award winning digital image,protein folding,fast matrix multiplication.Many recent developments in artificial neural networks,particularl...Three recent breakthroughs due to AI in arts and science serve as motivation:An award winning digital image,protein folding,fast matrix multiplication.Many recent developments in artificial neural networks,particularly deep learning(DL),applied and relevant to computational mechanics(solid,fluids,finite-element technology)are reviewed in detail.Both hybrid and pure machine learning(ML)methods are discussed.Hybrid methods combine traditional PDE discretizations with ML methods either(1)to help model complex nonlinear constitutive relations,(2)to nonlinearly reduce the model order for efficient simulation(turbulence),or(3)to accelerate the simulation by predicting certain components in the traditional integration methods.Here,methods(1)and(2)relied on Long-Short-Term Memory(LSTM)architecture,with method(3)relying on convolutional neural networks.Pure ML methods to solve(nonlinear)PDEs are represented by Physics-Informed Neural network(PINN)methods,which could be combined with attention mechanism to address discontinuous solutions.Both LSTM and attention architectures,together with modern and generalized classic optimizers to include stochasticity for DL networks,are extensively reviewed.Kernel machines,including Gaussian processes,are provided to sufficient depth for more advanced works such as shallow networks with infinite width.Not only addressing experts,readers are assumed familiar with computational mechanics,but not with DL,whose concepts and applications are built up from the basics,aiming at bringing first-time learners quickly to the forefront of research.History and limitations of AI are recounted and discussed,with particular attention at pointing out misstatements or misconceptions of the classics,even in well-known references.Positioning and pointing control of a large-deformable beam is given as an example.展开更多
This study systematically reviews and summarizes relocation and revamping project of medium and heavy plate rolling mill in Bayi Steel.After detailed analysis was made on the main deficiency and problems of the origin...This study systematically reviews and summarizes relocation and revamping project of medium and heavy plate rolling mill in Bayi Steel.After detailed analysis was made on the main deficiency and problems of the original production line of Pudong Steel,systematical integration and improvement for the process and equipment were carried out accordingly.Through innovative practice of integration,Baosteel Engineering has greatly improved the technical process and equipment make-up,as well as the grades and quality of the products.The original man-operating line is redesigned into an automatic system controlled by Level 2 computer,reaching the advanced technical level of home-made medium and heavy plate production line in recent years.The project is constructed in two phases;The original product mix of Pudong Steel is maintained as much as possible in Phase I.After 3 500 mm single stand finishing mill is put into operation, capacity of hot- rolling medium and heavy plate reaches 650 000 t/a,with the maximum thickness at 40 mm.Equipment or facilities are reserved for production of pipeline steel and other grades.Pipeline steel, vessel plate,wind power plate and other TMCP and heat treatment products are projected in PhaseⅡ.After 4 200 mm roughing mill and its matched facilities are put into operation,capacity of hot-rolling medium and heavy plate will reach 120 000 t/a,with the maximum thickness at 80 mm.Through the optimization of process equipment and its function,the relocated medium and heavy plate mill production line has reached advanced level among similar domestic mills.The prominent achievements of the project are the revamping of thickness control system of the finishing mill and the newly installed shape control system.Automation control of the whole line is realized.展开更多
Accelerating the construction of modern vocational education groups and promoting the integrated training of secondary vocational,vocational,and undergraduate talents,providing talent support for regional economic dev...Accelerating the construction of modern vocational education groups and promoting the integrated training of secondary vocational,vocational,and undergraduate talents,providing talent support for regional economic development,are inevitable choices to enhance the adaptability of vocational education.Based on the new development and requirements in the new situation,vocational colleges actively explore the path of connecting and cultivating secondary vocational,vocational,and undergraduate talents in accordance with the talent needs of local economic development and industrial system development.The linkage between government,school,and enterprise is established to build a modern vocational education group,aiming to build a professional chain in the industrial chain and promote innovative development of the new industrial system.Relying on the development needs of professional clusters,a multi-level system of connecting and cultivating secondary vocational,vocational,and undergraduate talents is constructed,which is in line with industry and enterprise standards.It is also necessary to build a“post-course competition certification”talent training model for connecting secondary vocational,vocational,and undergraduate students,rely on the advantages of multiple schools and enterprises,establish a platform for integrating industry and education,and innovate the evaluation system for connecting secondary vocational,vocational,and undergraduate students.展开更多
基金Supported by Humanistic Social Science Subject of Education Department of Sichuan Province-Research on the Integration Model and Countermeasures of Modern Agriculture and Rural Tourism(IY09-42)
文摘The thesis summarizes the connotation of rural tourism and divides it into six types,including rural sight-seeing,rural body-building activity,rural folk culture,rural experience of farm work,rural business affairs,and study and development.It outlines the theory of sustainable development of rural tourism and points out that what sustainable development of tourism concerns is the coordination of ecology,economy,and society centering on human and nature.On the basis of introducing the connotation of modern agriculture,it divides modern agriculture into six types,including sightseeing agriculture,leisure agriculture,green agriculture,characteristic agriculture,factory agriculture,and three-dimensional agriculture.And by concluding,it obtains the combination model of modern agriculture and rural tourism.Based on the introduction of the above related theories,the thesis discusses the interaction and integration model of the sustainable development of modern agriculture and rural tourism.It emphatically analyzes the integration model of modern agriculture and rural tourism,including pastoral agriculture tourism model(sightseeing village,leisure farm,citizen farm),and science education tourism model(agricultural science and technology education base,tourism and leisure education agricultural park,children's,agricultural education base,agricultural exposition).Based on the interaction and integration relationship between modern agriculture and rural tourism,the thesis puts forward corresponding countermeasures so as to promote their positive development and realize the maximum of ecological,social and economic benefits.
基金supported in part by the National Natural Science Foundation of China under Grant 61271262,61473047 and 61572083in part by Shaanxi Provincial Natural Science Foundation under Grant 2015JM6310in part by the Special Fund for Basic Scientific Research of Central Colleges,Chang’an University 310824152010 and 0009-2014G1241043
文摘Integration interval and decision threshold issues were investigated for improved transmitted reference pulse cluster(iTRPC-)ultra-wideband(UWB)systems. Our analysis shows that the bit error rate(BER)performance of iTRPC-UWB systems can be significantly improved via integration interval determination(IID)and decision threshold optimization. For this purpose,two modifications can be made at the autocorrelation receiver as follows. Firstly,the IID processing is performed for autocorrelation operation to capture multi-path energy as much as possible. Secondly,adaptive decision threshold(ADT)instead of zero decision threshold(ZDT),is used as estimated optimal decision threshold for symbol detection. Performance of iTRPCUWB systems using IID and ADT was evaluated in realistic IEEE 802.15.4a UWB channel models and the simulation results demonstrated our theoretical analysis.
文摘Three recent breakthroughs due to AI in arts and science serve as motivation:An award winning digital image,protein folding,fast matrix multiplication.Many recent developments in artificial neural networks,particularly deep learning(DL),applied and relevant to computational mechanics(solid,fluids,finite-element technology)are reviewed in detail.Both hybrid and pure machine learning(ML)methods are discussed.Hybrid methods combine traditional PDE discretizations with ML methods either(1)to help model complex nonlinear constitutive relations,(2)to nonlinearly reduce the model order for efficient simulation(turbulence),or(3)to accelerate the simulation by predicting certain components in the traditional integration methods.Here,methods(1)and(2)relied on Long-Short-Term Memory(LSTM)architecture,with method(3)relying on convolutional neural networks.Pure ML methods to solve(nonlinear)PDEs are represented by Physics-Informed Neural network(PINN)methods,which could be combined with attention mechanism to address discontinuous solutions.Both LSTM and attention architectures,together with modern and generalized classic optimizers to include stochasticity for DL networks,are extensively reviewed.Kernel machines,including Gaussian processes,are provided to sufficient depth for more advanced works such as shallow networks with infinite width.Not only addressing experts,readers are assumed familiar with computational mechanics,but not with DL,whose concepts and applications are built up from the basics,aiming at bringing first-time learners quickly to the forefront of research.History and limitations of AI are recounted and discussed,with particular attention at pointing out misstatements or misconceptions of the classics,even in well-known references.Positioning and pointing control of a large-deformable beam is given as an example.
文摘This study systematically reviews and summarizes relocation and revamping project of medium and heavy plate rolling mill in Bayi Steel.After detailed analysis was made on the main deficiency and problems of the original production line of Pudong Steel,systematical integration and improvement for the process and equipment were carried out accordingly.Through innovative practice of integration,Baosteel Engineering has greatly improved the technical process and equipment make-up,as well as the grades and quality of the products.The original man-operating line is redesigned into an automatic system controlled by Level 2 computer,reaching the advanced technical level of home-made medium and heavy plate production line in recent years.The project is constructed in two phases;The original product mix of Pudong Steel is maintained as much as possible in Phase I.After 3 500 mm single stand finishing mill is put into operation, capacity of hot- rolling medium and heavy plate reaches 650 000 t/a,with the maximum thickness at 40 mm.Equipment or facilities are reserved for production of pipeline steel and other grades.Pipeline steel, vessel plate,wind power plate and other TMCP and heat treatment products are projected in PhaseⅡ.After 4 200 mm roughing mill and its matched facilities are put into operation,capacity of hot-rolling medium and heavy plate will reach 120 000 t/a,with the maximum thickness at 80 mm.Through the optimization of process equipment and its function,the relocated medium and heavy plate mill production line has reached advanced level among similar domestic mills.The prominent achievements of the project are the revamping of thickness control system of the finishing mill and the newly installed shape control system.Automation control of the whole line is realized.
基金2022-2024 Sichuan Provincial Department of Education Vocational Education Talent Training and Education Reform Research Project General Project(Project number:Chuanjiaohan[2023]No.100,GZJG2022-107,Host:Li Hui):Comprehensive Education Research and Practice of“Post-Course Competition Certificate”in Higher Vocational Digital Media Majors from the Perspective of“Four Chains”Integration2023 Sichuan Provincial Education and Research Project(Key Project)(Project number:Chuanjiaohan[2023]-67,Host:Li Hui):Based on the"Three Double,Three Stage,and Four Integration"Vocational Digital Media Professional Education Path Research and Practice of the Skills Master Studio+2 种基金2022 Chengdu Agricultural College Key Education and Teaching Reform Project(JG-202202-11)The Education Reform Project of Chengdu Agricultural College in 2021(21JG-29)The 2022 Chengdu Education and Research Planning Project(CY2022ZZ31)。
文摘Accelerating the construction of modern vocational education groups and promoting the integrated training of secondary vocational,vocational,and undergraduate talents,providing talent support for regional economic development,are inevitable choices to enhance the adaptability of vocational education.Based on the new development and requirements in the new situation,vocational colleges actively explore the path of connecting and cultivating secondary vocational,vocational,and undergraduate talents in accordance with the talent needs of local economic development and industrial system development.The linkage between government,school,and enterprise is established to build a modern vocational education group,aiming to build a professional chain in the industrial chain and promote innovative development of the new industrial system.Relying on the development needs of professional clusters,a multi-level system of connecting and cultivating secondary vocational,vocational,and undergraduate talents is constructed,which is in line with industry and enterprise standards.It is also necessary to build a“post-course competition certification”talent training model for connecting secondary vocational,vocational,and undergraduate students,rely on the advantages of multiple schools and enterprises,establish a platform for integrating industry and education,and innovate the evaluation system for connecting secondary vocational,vocational,and undergraduate students.
基金2023年广东省高职院校课程思政教学改革研究与实践项目“融入区域(东莞)产业文化的课程思政育人体系建设与实践”(KCSZ05001),主持人:贺定修2023年省高职院校课程思政示范计划-课程思政示范课程“计算机辅助工业设计(二)”(KCSZ04007),主持人:易熙琼东莞职业技术学院质量工程教学改革项目“数智化转型背景下现场工程师培养困境及路径研究——基于专本协同模式”(JGX M 202405),主持人:徐兰。