Network economy had changed manufacturing environme nt at all. Open global market offer more choice to customer, and it become changea ble and unpredictable as consumers’ needs become more and more characteristic an ...Network economy had changed manufacturing environme nt at all. Open global market offer more choice to customer, and it become changea ble and unpredictable as consumers’ needs become more and more characteristic an d diversified. Various new technology coming forth and application accelerate th e rapid change of the market. The manufacturing enterprises were compelled t o change their strategy by the variability of the market, and time has been put to the all-important place. There is a need driven by the market to set up a ne twork design and manufacturing mode which have rapid market responsiveness. In order to meet the need for network manufacturing, the organization and manage ment of manufacturing enterprise need a completely innovation, next generation o f manufacturing system must have the character such as digitization, flexibility , agility, customization and globalization and so on. As for an enterprise in au to industry, how to gather together the orders through the distribution, and rap id produce the product which can meet the customer’s need, it is the key that th e contemporary enterprises succeed in the competitive market. The competitive market requires rapid product development. Close cooperation amo ng the designers will accelerate the product development by shortening the devel opment cycle, improving the product quality and reducing the investment. It has been emphasized in the methodology of concurrent engineering (CE). But sometimes those partners are distributed in the world, so there is a need for an importan t technology contribution to collaborative engineering, and supporting distribut ed designers for rapid product development. This paper focuses on a collaborative design system: Product Digit Collaborative Design System (PDCDS). The solution of PDCDS can make it more efficient and rel iable to visit teledata as well as we can get it from local database. It will be ease to get the newest design process information aided by PDCDS, and it will h ave higher efficiency by collaborative work. Comparing with other traditional Pr oduct Data Management (PDM) software system, PDCDS have some new characters such as group, dynamicness, synchronization or asynchronism working mode, and the hi story recorder is needed, and it also surport Webservice.展开更多
Development of complicated products is a project of system engineering It involves extensive and complicated knowledge,design methods and auxiliary technology Various factors affect each other So,modern product develo...Development of complicated products is a project of system engineering It involves extensive and complicated knowledge,design methods and auxiliary technology Various factors affect each other So,modern product development is a typical group problem with distributed and dynamic features It is apparent superiority to solve this problem with a multi agent system representing various knowledge domains Distributed artificial intelligence knowledge being used,the multi agent collaborative design system concept and model based on Internet environment are put forward The realizing method of product developing agents,interactive process among multi agents,and organization and implementing of the design project of the multi agent collaborative design system are discussed in detail Application examples are also presented.展开更多
The development of product is a complex process. Collaboration is necessary to this process to support multi-function teams’ participation in this process at the same time. Effective task decomposition is the prerequ...The development of product is a complex process. Collaboration is necessary to this process to support multi-function teams’ participation in this process at the same time. Effective task decomposition is the prerequisite of collaborative design and constraint network was used to express the relationship among design participants. In order to make the coupling collaborative design go smoothly, a constraint satisfaction model based on dynamic constraint is put forward. An integrated-based conflict resolution model is advanced to resolve the complex conflict during the process of collaborative design.展开更多
On the basis of analysis of the research issues and requirement of collaborative design, we propose the overall framework of agent based collaborative design on Internet. Then, we describe the implementation of synchr...On the basis of analysis of the research issues and requirement of collaborative design, we propose the overall framework of agent based collaborative design on Internet. Then, we describe the implementation of synchronous and asynchronous collaborative design process based on standardized design activities under the overall framework. In order to realize design message passing, the DMP Protocol is proposed as well in this paper and described in detail.展开更多
Generation of Product Concept needs to give full play to the designers’ innovative potential and collaborative work of experts in different fields. However, the collaborative innovative capabilities of geographically...Generation of Product Concept needs to give full play to the designers’ innovative potential and collaborative work of experts in different fields. However, the collaborative innovative capabilities of geographically distributed designers are often limited and hindered by space and time. Therefore, on the basis of the requirements analysis of Internet based collaborative conceptual design and the research work we have done, this paper proposes the overall framework of supporting collaborative conceptual design on Internet. Based on this overall framework, the authors further put forward collaborative conceptual design process model that includes three stages: concept generation, concept communication and optimal product concept selection. At the end of the paper, the experiment environment of collaborative design is described. The overall framework and collaborative conceptual design process model proposed can take full advantage of Internet and give full play to experts’ experiences and wisdom, so that the rapid development and innovative design of product can be provided with effectively and efficiently implemental mode and support on Internet.展开更多
Collaboration in large projects is a major challenge for contemporary architectural practice and this paper presents a notation for describing and analyzing how these collaborations can take place.Based on an extensiv...Collaboration in large projects is a major challenge for contemporary architectural practice and this paper presents a notation for describing and analyzing how these collaborations can take place.Based on an extensive literature review some opportunities were found for the development of a notation that combined three particular aspects:network diagrams,Euler diagrams and a model from architectural design.An exploratory case study was conducted based on the collaboration during a complex architectural project,which combined three approaches:document analysis,semi-structured interviews with key stakeholders and a comparison of the documents with results from the interviews.The notation demonstrated to be suitable for two purposes:to improve the understanding of particular design events and as support material for presenting and exploring collaborations.Results indicate that the notation was suitable,comprehensible and flexible,and it demonstrated good value when used in speculative ways,such as an intermediary design artifact that supports discussion and improvements in the collaboration process,which indicates promising future directions.It can also be argued that,similar to a sketch,the notation can also support the process of planning and“designing”the interaction between teams in design fields and even in other project-based organizations.展开更多
A novel approach for partitioning and coordinating the collaborative design optimization of complex systems is described.A partitioning metric has been formulated to select the best partitioning solutions among the to...A novel approach for partitioning and coordinating the collaborative design optimization of complex systems is described.A partitioning metric has been formulated to select the best partitioning solutions among the total possibilities of dividing the complex design optimization problem.Then,an agent-supported approach is used for the coordination of the collaborative design optimization.The approach has been applied to the case of a preliminary design of an electric vehicle,to demonstrate how various agents can effectively communicate with each other to provide support to the collaborative design optimization of complex systems.展开更多
Crowdsourcing is an innovative business practice of obtaining needed services, ideas, or content or even funds by soliciting contributions from a large group of people(the ‘Crowd'). The potential benefits of util...Crowdsourcing is an innovative business practice of obtaining needed services, ideas, or content or even funds by soliciting contributions from a large group of people(the ‘Crowd'). The potential benefits of utilizing crowdsourcing in product design are well-documented, but little research exists on what are the barriers and opportunities in adopting crowdsourcing in new product development(NPD) of manufacturing SMEs. In order to answer the above questions, a Proof of Market study is carried out on crowdsourcing-based product design under an Innovate UK funded Smart project, which aims at identifying the needs, challenges and future development opportunities associated with adopting crowdsourcing strategies for NPD. The research findings from this study are reported here and can be used to guide future development of crowdsourcing-based collaborative design methods and tools and provide some practical references for industry to adopt this new and emerging collaborative design method in their business.展开更多
In this study,phosphoenolpyruvate and erythrose-4-phosphate are efficiently supplied by collaborative design of Embden-Meyerhof-Parnas(EMP)pathway and pentose phosphate(PP)pathway in Escherichia coli,thus increasing t...In this study,phosphoenolpyruvate and erythrose-4-phosphate are efficiently supplied by collaborative design of Embden-Meyerhof-Parnas(EMP)pathway and pentose phosphate(PP)pathway in Escherichia coli,thus increasing the L-tryptophan production.Firstly,the effects of disrupting EMP pathway on L-tryptophan production were studied,and the results indicated that the strain with deletion of phosphofructokinase A(i.e.,E.coli JW-5ΔpfkA)produced 23.4±2.1 g/L of L-tryptophan production.However,deletion of phosphofructokinase A and glucosephosphate isomerase is not conducive to glucose consumption and cell growth,especially deletion of glucosephosphate isomerase.Next,the carbon flux in PP pathway was enhanced by introduction of the desensitized glucose-6-phosphate dehydrogenase(zwf)and 6-phosphogluconate dehydrogenase(gnd)and thus increasing the L-tryptophan production(i.e.,26.5±3.2 g/L vs.21.7±1.3 g/L)without obviously changing the cell growth(i.e.,0.41 h^(-1) vs.0.44 h^(-1))as compared with the original strain JW-5.Finally,the effects of co-modifying EMP pathway and PP pathway on L-tryptophan production were investigated.It was found that the strain with deletion of phosphofructokinase A as well as introduction of the desensitized zwf and gnd(i.e.,E.coli JW-5 zwf243 gnd361ΔpfkA)produced 31.9±2.7 g/L of L-tryptophan,which was 47.0%higher than that of strain JW-5.In addition,the glucose consumption rate of strain JW-5 zwf243 gnd361ΔpfkA was obviously increased despite of the bad cell growth as compared with strain JW-5.The results of this study have important reference value for the following application of metabolic engineering to improve aromatic amino acids producing strains.展开更多
A new thermal protection design method for hypersonic vehicle's leading edge is proposed, which can effectively reduce temperature of the leading edge without additional cooling measures. This method reduces the l...A new thermal protection design method for hypersonic vehicle's leading edge is proposed, which can effectively reduce temperature of the leading edge without additional cooling measures. This method reduces the leading-edge's temperature by the multi-scale collaborative design of the macroscopic thermal optimization and the mesoscopic woven structures of Three-dimensional Orthogonal Woven Ceramic Matrix Composites(TOCMC). The macroscopic thermal optimization is achieved by designing different mesoscopic woven structures in different regions to create combined heat transfer channels to dredge the heat. The combined heat transfer channel is macroscopically represented by the anisotropic thermal conductivity of TOCMC. The thermal optimization multiple linear regression model is established to optimize the heat transport channel, which predicts Theoretical Optimal Thermal Conductivity Configuration(TOTCC) in different regions to achieve the lowest leading-edge temperature. The function-oriented mesostructure design method is invented to design the corresponding mesostructure of TOCMC according to the TOTCC, which consists of universal thermal conductivity prediction formulas for TOCMC. These universal formulas are firstly derived based on the thermal resistance network method, which is verified by experiments with an error of 6.25%. The results show that the collaborative design method can effectively reduce the leading edge temperature by about 12.8% without adding cooling measures.展开更多
1Overview of the CR Fuxing high-speed EMUseries The independently developed CR(China Railways)Fuxing high-speed EMU(electric multiple unit)series by China currently comprises three speed-level product series:CR400,CR3...1Overview of the CR Fuxing high-speed EMUseries The independently developed CR(China Railways)Fuxing high-speed EMU(electric multiple unit)series by China currently comprises three speed-level product series:CR400,CR300,and CR200,as shown in Fig.1.The EMUs demonstrate adaptability to various geographical and climatic conditions,including high plateaus,extremely cold regions,strong wind and sandy environmental conditions,with a designed service life of 30 years.The 350 km/h speed level of the CR-Fuxing series primarily consists of two platforms,namely CR400AF and CR400BF,both of them are electric multiple units with distributed power.Each 8-car formation is configured with a 4M4T arrangement,divided into two traction units(Tc+M+Tp+M).展开更多
Cloud manufacturing is emerging as a new manufacturing paradigm and an integrated technology.To adapt to the increasing challenges of the traditional manufacturing industry transforming toward service-oriented and inn...Cloud manufacturing is emerging as a new manufacturing paradigm and an integrated technology.To adapt to the increasing challenges of the traditional manufacturing industry transforming toward service-oriented and innovative manufacturing,this paper proposes a product platform architecture based on cloud manufacturing.Firstly,a framework for the product platform for cloud manufacturing was built.The proposed architecture is composed of five layers:resource,cloud technology,cloud service,application,and user layers.Then,several key enabling technologies for forming the product platform were studied.Finally,the product platform for cloud manufacturing built by a company was taken as an application example to illustrate the architecture and functions of the system.The validity and superiority of the architecture were verified.展开更多
文摘Network economy had changed manufacturing environme nt at all. Open global market offer more choice to customer, and it become changea ble and unpredictable as consumers’ needs become more and more characteristic an d diversified. Various new technology coming forth and application accelerate th e rapid change of the market. The manufacturing enterprises were compelled t o change their strategy by the variability of the market, and time has been put to the all-important place. There is a need driven by the market to set up a ne twork design and manufacturing mode which have rapid market responsiveness. In order to meet the need for network manufacturing, the organization and manage ment of manufacturing enterprise need a completely innovation, next generation o f manufacturing system must have the character such as digitization, flexibility , agility, customization and globalization and so on. As for an enterprise in au to industry, how to gather together the orders through the distribution, and rap id produce the product which can meet the customer’s need, it is the key that th e contemporary enterprises succeed in the competitive market. The competitive market requires rapid product development. Close cooperation amo ng the designers will accelerate the product development by shortening the devel opment cycle, improving the product quality and reducing the investment. It has been emphasized in the methodology of concurrent engineering (CE). But sometimes those partners are distributed in the world, so there is a need for an importan t technology contribution to collaborative engineering, and supporting distribut ed designers for rapid product development. This paper focuses on a collaborative design system: Product Digit Collaborative Design System (PDCDS). The solution of PDCDS can make it more efficient and rel iable to visit teledata as well as we can get it from local database. It will be ease to get the newest design process information aided by PDCDS, and it will h ave higher efficiency by collaborative work. Comparing with other traditional Pr oduct Data Management (PDM) software system, PDCDS have some new characters such as group, dynamicness, synchronization or asynchronism working mode, and the hi story recorder is needed, and it also surport Webservice.
基金This project is supported by National Natural Science Foundation of China (No.59875087) and by Foundation for University Key T
文摘Development of complicated products is a project of system engineering It involves extensive and complicated knowledge,design methods and auxiliary technology Various factors affect each other So,modern product development is a typical group problem with distributed and dynamic features It is apparent superiority to solve this problem with a multi agent system representing various knowledge domains Distributed artificial intelligence knowledge being used,the multi agent collaborative design system concept and model based on Internet environment are put forward The realizing method of product developing agents,interactive process among multi agents,and organization and implementing of the design project of the multi agent collaborative design system are discussed in detail Application examples are also presented.
文摘The development of product is a complex process. Collaboration is necessary to this process to support multi-function teams’ participation in this process at the same time. Effective task decomposition is the prerequisite of collaborative design and constraint network was used to express the relationship among design participants. In order to make the coupling collaborative design go smoothly, a constraint satisfaction model based on dynamic constraint is put forward. An integrated-based conflict resolution model is advanced to resolve the complex conflict during the process of collaborative design.
文摘On the basis of analysis of the research issues and requirement of collaborative design, we propose the overall framework of agent based collaborative design on Internet. Then, we describe the implementation of synchronous and asynchronous collaborative design process based on standardized design activities under the overall framework. In order to realize design message passing, the DMP Protocol is proposed as well in this paper and described in detail.
文摘Generation of Product Concept needs to give full play to the designers’ innovative potential and collaborative work of experts in different fields. However, the collaborative innovative capabilities of geographically distributed designers are often limited and hindered by space and time. Therefore, on the basis of the requirements analysis of Internet based collaborative conceptual design and the research work we have done, this paper proposes the overall framework of supporting collaborative conceptual design on Internet. Based on this overall framework, the authors further put forward collaborative conceptual design process model that includes three stages: concept generation, concept communication and optimal product concept selection. At the end of the paper, the experiment environment of collaborative design is described. The overall framework and collaborative conceptual design process model proposed can take full advantage of Internet and give full play to experts’ experiences and wisdom, so that the rapid development and innovative design of product can be provided with effectively and efficiently implemental mode and support on Internet.
基金supported by process No.2018/12304-8,FAPESP(Sao Paulo Research Foundation).
文摘Collaboration in large projects is a major challenge for contemporary architectural practice and this paper presents a notation for describing and analyzing how these collaborations can take place.Based on an extensive literature review some opportunities were found for the development of a notation that combined three particular aspects:network diagrams,Euler diagrams and a model from architectural design.An exploratory case study was conducted based on the collaboration during a complex architectural project,which combined three approaches:document analysis,semi-structured interviews with key stakeholders and a comparison of the documents with results from the interviews.The notation demonstrated to be suitable for two purposes:to improve the understanding of particular design events and as support material for presenting and exploring collaborations.Results indicate that the notation was suitable,comprehensible and flexible,and it demonstrated good value when used in speculative ways,such as an intermediary design artifact that supports discussion and improvements in the collaboration process,which indicates promising future directions.It can also be argued that,similar to a sketch,the notation can also support the process of planning and“designing”the interaction between teams in design fields and even in other project-based organizations.
文摘A novel approach for partitioning and coordinating the collaborative design optimization of complex systems is described.A partitioning metric has been formulated to select the best partitioning solutions among the total possibilities of dividing the complex design optimization problem.Then,an agent-supported approach is used for the coordination of the collaborative design optimization.The approach has been applied to the case of a preliminary design of an electric vehicle,to demonstrate how various agents can effectively communicate with each other to provide support to the collaborative design optimization of complex systems.
基金Supported by Innovate UK Smart Project(Grant No.700484)
文摘Crowdsourcing is an innovative business practice of obtaining needed services, ideas, or content or even funds by soliciting contributions from a large group of people(the ‘Crowd'). The potential benefits of utilizing crowdsourcing in product design are well-documented, but little research exists on what are the barriers and opportunities in adopting crowdsourcing in new product development(NPD) of manufacturing SMEs. In order to answer the above questions, a Proof of Market study is carried out on crowdsourcing-based product design under an Innovate UK funded Smart project, which aims at identifying the needs, challenges and future development opportunities associated with adopting crowdsourcing strategies for NPD. The research findings from this study are reported here and can be used to guide future development of crowdsourcing-based collaborative design methods and tools and provide some practical references for industry to adopt this new and emerging collaborative design method in their business.
基金This work as financially supported by the National Key Research and Development Program of China(2021YFC2100900)the Key Laboratory of Industrial Biotechnology,Ministry of Education,Jiangnan University(KLIB-KF 202004)Fundamental Research Funds for the Central Universities[No.JUSRP115A19].
文摘In this study,phosphoenolpyruvate and erythrose-4-phosphate are efficiently supplied by collaborative design of Embden-Meyerhof-Parnas(EMP)pathway and pentose phosphate(PP)pathway in Escherichia coli,thus increasing the L-tryptophan production.Firstly,the effects of disrupting EMP pathway on L-tryptophan production were studied,and the results indicated that the strain with deletion of phosphofructokinase A(i.e.,E.coli JW-5ΔpfkA)produced 23.4±2.1 g/L of L-tryptophan production.However,deletion of phosphofructokinase A and glucosephosphate isomerase is not conducive to glucose consumption and cell growth,especially deletion of glucosephosphate isomerase.Next,the carbon flux in PP pathway was enhanced by introduction of the desensitized glucose-6-phosphate dehydrogenase(zwf)and 6-phosphogluconate dehydrogenase(gnd)and thus increasing the L-tryptophan production(i.e.,26.5±3.2 g/L vs.21.7±1.3 g/L)without obviously changing the cell growth(i.e.,0.41 h^(-1) vs.0.44 h^(-1))as compared with the original strain JW-5.Finally,the effects of co-modifying EMP pathway and PP pathway on L-tryptophan production were investigated.It was found that the strain with deletion of phosphofructokinase A as well as introduction of the desensitized zwf and gnd(i.e.,E.coli JW-5 zwf243 gnd361ΔpfkA)produced 31.9±2.7 g/L of L-tryptophan,which was 47.0%higher than that of strain JW-5.In addition,the glucose consumption rate of strain JW-5 zwf243 gnd361ΔpfkA was obviously increased despite of the bad cell growth as compared with strain JW-5.The results of this study have important reference value for the following application of metabolic engineering to improve aromatic amino acids producing strains.
基金co-supported by the Science Center for Gas Turbine Project, China (No. P2022-B-Ⅱ-025-001)the National Science and Technology Major Project, China (No. Y2019-Ⅰ-0018-0017)。
文摘A new thermal protection design method for hypersonic vehicle's leading edge is proposed, which can effectively reduce temperature of the leading edge without additional cooling measures. This method reduces the leading-edge's temperature by the multi-scale collaborative design of the macroscopic thermal optimization and the mesoscopic woven structures of Three-dimensional Orthogonal Woven Ceramic Matrix Composites(TOCMC). The macroscopic thermal optimization is achieved by designing different mesoscopic woven structures in different regions to create combined heat transfer channels to dredge the heat. The combined heat transfer channel is macroscopically represented by the anisotropic thermal conductivity of TOCMC. The thermal optimization multiple linear regression model is established to optimize the heat transport channel, which predicts Theoretical Optimal Thermal Conductivity Configuration(TOTCC) in different regions to achieve the lowest leading-edge temperature. The function-oriented mesostructure design method is invented to design the corresponding mesostructure of TOCMC according to the TOTCC, which consists of universal thermal conductivity prediction formulas for TOCMC. These universal formulas are firstly derived based on the thermal resistance network method, which is verified by experiments with an error of 6.25%. The results show that the collaborative design method can effectively reduce the leading edge temperature by about 12.8% without adding cooling measures.
文摘1Overview of the CR Fuxing high-speed EMUseries The independently developed CR(China Railways)Fuxing high-speed EMU(electric multiple unit)series by China currently comprises three speed-level product series:CR400,CR300,and CR200,as shown in Fig.1.The EMUs demonstrate adaptability to various geographical and climatic conditions,including high plateaus,extremely cold regions,strong wind and sandy environmental conditions,with a designed service life of 30 years.The 350 km/h speed level of the CR-Fuxing series primarily consists of two platforms,namely CR400AF and CR400BF,both of them are electric multiple units with distributed power.Each 8-car formation is configured with a 4M4T arrangement,divided into two traction units(Tc+M+Tp+M).
基金This research was supported by the National Key Research and Development Program of China(Grant No.2017YFB1104201)the National Natural Science Foundation of China(Grant No.51675028)+1 种基金the Aeronautical Science Foundation of China(Grant No.20171651015)the State Key Lab of Digital Manufacturing Equipment&Technology(Grant No.DMETKF2017020).
文摘Cloud manufacturing is emerging as a new manufacturing paradigm and an integrated technology.To adapt to the increasing challenges of the traditional manufacturing industry transforming toward service-oriented and innovative manufacturing,this paper proposes a product platform architecture based on cloud manufacturing.Firstly,a framework for the product platform for cloud manufacturing was built.The proposed architecture is composed of five layers:resource,cloud technology,cloud service,application,and user layers.Then,several key enabling technologies for forming the product platform were studied.Finally,the product platform for cloud manufacturing built by a company was taken as an application example to illustrate the architecture and functions of the system.The validity and superiority of the architecture were verified.
