Purpose-Conventional high-speed railways(HSR)subgrade design methods remain constrained by platformdependent drafting systems,leading to data interaction hindrances and redundant design processes.This study strives to...Purpose-Conventional high-speed railways(HSR)subgrade design methods remain constrained by platformdependent drafting systems,leading to data interaction hindrances and redundant design processes.This study strives to develop a digital earthwork design methodology that enhances design while reducing collaborative expenses.Design/methodology/approach-A novel digital subgrade design approach,utilizing sophisticated analysis and modeling tools customized for different subgrade elements,is put forward in this study.The methodology incorporates the following essential steps:(1)the advancement of digital analysis and modeling techniques for diverse subgrade components,including surfaces,filling,slopes,retaining structures,and foundation treatments;(2)the formulation of a digital design principle repository incorporating various slope protection combinations;(3)the establishment of a comprehensive digital design framework and process for subgrade cross-sections;and(4)the development and implementation of an open-source digital design system.Findings-The proposed method liberates subgrade design from the constraints of conventional drawing platforms,elevating efficiency,intelligence,and flexibility.The open software architecture and code have achieved over 60%efficiency gains in design workflows during its deployment on three major high-speed rail projects:the Baotou-Yinchuan HSR corridor,Shenyang-Baihe HSR network,and Weifang-Yantai HSR system.Originality/value-This paper introduces an innovative digital design methodology that enables modular and parametric design for railway subgrade sections.The proposed approach provides a digital base for the intelligent design and maintenance of the next-generation high-speed railway.展开更多
A direct digital design method(DDDM)of worm-gear drive is proposed.It is directly based on the simulation of manufacturing process and completely different from the conventional modeling method.The loaded tooth contac...A direct digital design method(DDDM)of worm-gear drive is proposed.It is directly based on the simulation of manufacturing process and completely different from the conventional modeling method.The loaded tooth contact analysis(LTCA)method is analyzed,in which the advanced surface to surface searching technique is included.The influence of misalignment errors and contact deformations on contact zone and transmission error(TE)is discussed.Combined modification approach on worm tooth surface is presented.By means of DDDM and LTCA,it is very conven-ient to verify the effect of worm-gear drive's modification approach.The analysis results show that,the modification in profile direction reduces the sensitivity of worm-gear drive to misalignment errors and the modification in longitudinal direction decreases the TE.Thus the optimization design of worm-gear drive can be achieved prior to the actual manufacturing process.展开更多
Industry 4.0 as referred to the fourth industrial revolution has endorsed in several national manufacturing initiatives or development plans such as in Germany, the UK, USA and China. A set of important pervasive and ...Industry 4.0 as referred to the fourth industrial revolution has endorsed in several national manufacturing initiatives or development plans such as in Germany, the UK, USA and China. A set of important pervasive and secondary technologies for future manufacturing activities have been identified such as additive manufacturing, sensor technology,展开更多
Digital design and manufacturing have been around for several decades from the numerical control of machine tools and automating engineering design in 1960s, through early Computer Aided Design （CAD）/Computer Aided ...Digital design and manufacturing have been around for several decades from the numerical control of machine tools and automating engineering design in 1960s, through early Computer Aided Design （CAD）/Computer Aided Engineering analysis （CAE）/Computer Aided Manufacturing （CAM）, to modem digital design and manufacturing [1], and cloud manufacturing [2] converging into product lifecycle management （PLM） [3, 4] and Internet-enabled personalized manufacturing [5].展开更多
Mandibular defect occurs more frequently in recent years,and clinical repair operations via bone transplantation are difficult to be further improved due to some intrinsic flaws.Tissue engineering,which is a hot resea...Mandibular defect occurs more frequently in recent years,and clinical repair operations via bone transplantation are difficult to be further improved due to some intrinsic flaws.Tissue engineering,which is a hot research field of biomedical engineering,provides a new direction for mandibular defect repair.As the basis and key part of tissue engineering,scaffolds have been widely and deeply studied in regards to the basic theory,as well as the principle of biomaterial,structure,design,and fabrication method.However,little research is targeted at tissue regeneration for clinic repair operations.Since mandibular bone has a special structure,rather than uniform and regular structure in existing studies,a methodology based on tissue engineering is proposed for mandibular defect repair in this paper.Key steps regarding scaffold digital design,such as external shape design and internal microstructure design directly based on triangular meshes are discussed in detail.By analyzing the theoretical model and the measured data from the test parts fabricated by rapid prototyping,the feasibility and effectiveness of the proposed methodology are properly verified.More works about mechanical and biological improvements need to be done to promote its clinical application in future.展开更多
3D digital design for cranes’structures based on hybrid software architecture of Client/Server and Browser/Server is introduced in this paper.Based on Pro/ENGINEER platform,3D parametric model family is built to allo...3D digital design for cranes’structures based on hybrid software architecture of Client/Server and Browser/Server is introduced in this paper.Based on Pro/ENGINEER platform,3D parametric model family is built to allow generation of feasible configurations of cranes’structures in Client/Server framework.Taking use of Visual C++,the second exploiting software kit provided by Pro/ENGINEER and ANSYS GUI/APDL modeling patterns,an integration method of 3D CAD and CAE is achieved,which includes regeneration of 3D parametric model,synchronous updating and analysis of FEA model.As in Browser/Server framework,the 3D CAD models of parts,components and the whole structure could also be displayed in the customer’s browser in VRML format.展开更多
Objective:To evaluate the clinical efficacy of the preoperative digita1 design combined with three dimensional(3D)printing models to assist percutaneous kyphoplasty(PKP)treatment for thoracolumbar compression frac tur...Objective:To evaluate the clinical efficacy of the preoperative digita1 design combined with three dimensional(3D)printing models to assist percutaneous kyphoplasty(PKP)treatment for thoracolumbar compression frac tures.Methods:From January 2018 to August 2020,we obtained data of 99 patients diagnosed thoracolumbar compression fractures.These patients were divided into control group(n=50)underwent traditional PKP surgery,and observation group(n=49)underwent preoperative digital design combined with 3D printing model assisted PKP treatment.The clinical efficacy was evaluated with five parameters,including operation time,number of intraoperative radiographs,visual analogue scale(VAS)score,Cobb Angle change,and high compression rate of injured vertebrae.Results:There were statistically significant differences of operation time and number of intraoperative radio graphs between the two groups(P<0.05).For VAS score,Cobb Angle change and vertebral height compression rate,all of these three parameters were significantly improved when the patients accepted surgery teatment in two groups(P<0.05).However,there were no significant differences between control group and observation group for these three parameters either before or after surgery(P>0.05).Conclusions:Through the design of preoperative surgical guide plate and the application of 3D printing model to guide the operation,the precise design of preoperative surgical puncture site and puncture Angle of the injured vertebra was realized,the number of intraoperative radiographs was reduced,the operation time was shortened and the operation efficiency was improved.展开更多
Industry 4.0 as referred to a fourth industrial revolution has endorsed in several national manufacturing development plans such as in Germany, the UK, and China. A set of important pervasive and secondary technologie...Industry 4.0 as referred to a fourth industrial revolution has endorsed in several national manufacturing development plans such as in Germany, the UK, and China. A set of important pervasive and secondary technologies for future manufacturing activities have been identified such as additive manufacturing, sensor technology, big data analytics, Internet of things, robotics, cloud computing, and nanotechnology.展开更多
In order to obtain digital design of complex mechanical product as optimal as possible in an efficient way,multi-discipline integrated design method is proposed,which integrates multidisciplinary design optimization(M...In order to obtain digital design of complex mechanical product as optimal as possible in an efficient way,multi-discipline integrated design method is proposed,which integrates multidisciplinary design optimization(MDO)into digital design process to design virtual prototype(VP)efficiently.Through combining MDO and multi-body system dynamics,MDO integra-tion platform,which takes VP as the core,is constructed.Then automated MDO design of VP is realized and changes of mechani-cal design project can be expressed intuitively during MDO design process.The proposed approach is also demonstrated by using inte-grated analyzing flow of vehicle engineering design.The result shows that the method not only can feasibly realize the MDO of VP,but also can solve the optimization problem of vehicle multi-body system dynamic performance.It can be adopted to the digital de-sign of other complex system.展开更多
Mostly product design knowledge and experience exists in design handbook or expert’s brain.During design process,designer has to refer to many handbooks and design materials,and design solution is hard to be reused.I...Mostly product design knowledge and experience exists in design handbook or expert’s brain.During design process,designer has to refer to many handbooks and design materials,and design solution is hard to be reused.In order to deal with these deficiencies in digital design,this paper focuses on knowledge-reuse-oriented product modeling and knowledge management.Design knowledge is used to guide design process,and it is embedded into product model along with design process.Through analyzing design process,mechanical product knowledge is classified into four basic types that include calculation formula,design rule,engineering check and parameter spectrum etc.In order to manage and encapsulate design knowledge the concept of knowledge component(KCOM)is proposed.Design knowledge base can be organized as a hierarchy tree of KCOM.Knowledge reuse in KCOM level is the reuse of whole object in knowledge base,and knowledge reuse in item level is the reuse of basic knowledge type.Finally knowledge reuse approaches between knowledge base and CAD system is presented.展开更多
Digital design and manufacturing have been under pinned by digital modeling, simulation, and automation controls for decades. Under the new market requirement of mass customized products and services, the advancements...Digital design and manufacturing have been under pinned by digital modeling, simulation, and automation controls for decades. Under the new market requirement of mass customized products and services, the advancements in artificial intelligence （AI）, smart technology, virtual reality （VR）, big data, digital twin, robotics and human-centered design are becoming driving forces for the development of future digital design and manufacturing. This special issue focuses on the future digital design and manufacturing especially under the Industry 4.0 framework and beyond. This editorial introduces the papers in this special issue, which linked to the International Workshop on Digital Design and Manufacturing Technologies - Embracing Industry 4.0 and Beyond at Northumbria University in Newcastle, UK, held on 12-13 April 2016. In the Part I of the issue [1], there are 13 papers published in 2016, Vol- ume 29, No 6 of the Chinese Journal of Mechanical Engineering （this journal）.展开更多
Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was...Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was developed. Basic software systems for modeling, modifying, and assembly simulation were developed. The system has good compatibility, and models created by it can be saved in different 3-D file formats, and 2D engineering drawings can be output directly. The model can be modified dynamically, overcoming the necessity of repeated modifications during hull structural design. Through operations such as model construction, intervention inspection, and collision detection, problems can be identified and modified during the hull structural design stage. Technologies for centralized control of the system, database management, and 3-D digital design are integrated into this digital model in the preliminary design stage of shipbuilding.展开更多
As crucial carriers of culture,ancient paintings embody profound historical narratives and aesthetic values.Yet,the lack of professional expertise often hinders non-experts from fully appreciating these works.This dis...As crucial carriers of culture,ancient paintings embody profound historical narratives and aesthetic values.Yet,the lack of professional expertise often hinders non-experts from fully appreciating these works.This disconnect leads to misinterpretation and creates a barrier that diminishes the value of aesthetic education.Digital design is currently revolutionizing public engagement with ancient painting,offering transformative pathways to enhance aesthetic appreciation(Chen et al.,2025a;Tang et al.,2024).展开更多
Digital design and optimal are very important in modern design.The traditional design methods and procedure are not fit for the modern missile weapons research and development.Digital design methods and optimal ideas ...Digital design and optimal are very important in modern design.The traditional design methods and procedure are not fit for the modern missile weapons research and development.Digital design methods and optimal ideas were employed to deal with this problem.The disadvantages of the traditional missile’s airframe design procedure and the advantages of the digital design methods were discussed.A new concept of design process reengineering(DPR)was put forward.An integrated missile air-frame digital design platform and the digital design procedure,which integrated the optimization ideas and methods,were devel-oped.Case study showed that the design platform and the design procedure could improve the efficiency and quality of missile’s airframe design,and get the more reasonable and optimal results.展开更多
How to design and organize the implementation of teaching is an important consideration for the quality of the course.This paper takes the“Digital Logic Design”course as an example,and carries out teaching design an...How to design and organize the implementation of teaching is an important consideration for the quality of the course.This paper takes the“Digital Logic Design”course as an example,and carries out teaching design and practice based on the blended teaching mode.By adopting various forms such as MOOC+SPOC+theme seminars,beneficial explorations have been made in improving students’autonomous learning ability,strengthening engineering literacy,and cultivating innovation ability.展开更多
Sampling design(SD) plays a crucial role in providing reliable input for digital soil mapping(DSM) and increasing its efficiency.Sampling design, with a predetermined sample size and consideration of budget and spatia...Sampling design(SD) plays a crucial role in providing reliable input for digital soil mapping(DSM) and increasing its efficiency.Sampling design, with a predetermined sample size and consideration of budget and spatial variability, is a selection procedure for identifying a set of sample locations spread over a geographical space or with a good feature space coverage. A good feature space coverage ensures accurate estimation of regression parameters, while spatial coverage contributes to effective spatial interpolation.First, we review several statistical and geometric SDs that mainly optimize the sampling pattern in a geographical space and illustrate the strengths and weaknesses of these SDs by considering spatial coverage, simplicity, accuracy, and efficiency. Furthermore, Latin hypercube sampling, which obtains a full representation of multivariate distribution in geographical space, is described in detail for its development, improvement, and application. In addition, we discuss the fuzzy k-means sampling, response surface sampling, and Kennard-Stone sampling, which optimize sampling patterns in a feature space. We then discuss some practical applications that are mainly addressed by the conditioned Latin hypercube sampling with the flexibility and feasibility of adding multiple optimization criteria. We also discuss different methods of validation, an important stage of DSM, and conclude that an independent dataset selected from the probability sampling is superior for its free model assumptions. For future work, we recommend: 1) exploring SDs with both good spatial coverage and feature space coverage; 2) uncovering the real impacts of an SD on the integral DSM procedure;and 3) testing the feasibility and contribution of SDs in three-dimensional(3 D) DSM with variability for multiple layers.展开更多
The advanced fin-shaped field-effect transistor(FinFET)technology offers higher integration density and stronger channel control capabilities,however,more complex process effects are also introduced which have signifi...The advanced fin-shaped field-effect transistor(FinFET)technology offers higher integration density and stronger channel control capabilities,however,more complex process effects are also introduced which have significant influence on device performance.To address these issues,we complete a design-technology co-optimization(DTCO)focused on FinFET,including both process-induced effect during gate formation and corresponding digital unit optimization design.The 14 nm Fin-FET complementary metal oxide semiconductor(CMOS)technology is used to illustrate the sensitivity of transistor perfor-mance to process-induced effect,specifically the poly pitch effect(PPE)and cut poly effect(CPE).Predictive technology com-puter aided design(TCAD)simulations have been carried out to evaluate the transistor performance in advance.Based on the results,optimizations in digital unit design is proposed.Fall delay of the digital unit inverter is decreased by 0.7%,and the rise delay is decreased by 2.1%.For multiple selector(MUX2NV),the delay decreases by 4.64%for rise and 3.56%for drop,respec-tively.展开更多
The main purpose of this study was to carry out the DACUM(developing a curriculum)analysis in studying the job functions for digital media designers in Taiwan,China as a case study.The primary tasks were twofold:(A)St...The main purpose of this study was to carry out the DACUM(developing a curriculum)analysis in studying the job functions for digital media designers in Taiwan,China as a case study.The primary tasks were twofold:(A)Study the DACUM Occupational Analysis'connotation and(B)Investigate the outputs of the DACUM Occupational Analysis and establish a job function profile for digital media designers.The research method included(a)Literature Review,to review and discuss the connotation of DACUM Occupational Analysis and(b)Comparative Study,in which a variety of charts of the occupational analysis obtained from the Literature Review were compared to reach conclusions.In summary,various DACUM charts obtained from literature reviews on digital media design jobs appeared significantly different in contents of the charts.Therefore,in any future and consecutive DACUM Occupational Analysis,exiting DACUM Charts could be referenced as the starting point for the DACUM process;then the parameters such as the number of facilitators,panelists,number of tasks,job function duties,personal traits,tools and attributes,etc.should be reviewed and optimized depending on the actual requirement,local development,cultural background,local training and educational levels,etc..Hopefully the case study in establishing the job function descriptions for digital media designers in Taiwan,China presented in the Conclusion Section of this report has demonstrated this process satisfactorily.展开更多
基金supported by the major project of China State Railway Group Co.,Ltd.(No.Q2023G020)the internal project of China Railway Design Cooperation(No.2023A0248002).
文摘Purpose-Conventional high-speed railways(HSR)subgrade design methods remain constrained by platformdependent drafting systems,leading to data interaction hindrances and redundant design processes.This study strives to develop a digital earthwork design methodology that enhances design while reducing collaborative expenses.Design/methodology/approach-A novel digital subgrade design approach,utilizing sophisticated analysis and modeling tools customized for different subgrade elements,is put forward in this study.The methodology incorporates the following essential steps:(1)the advancement of digital analysis and modeling techniques for diverse subgrade components,including surfaces,filling,slopes,retaining structures,and foundation treatments;(2)the formulation of a digital design principle repository incorporating various slope protection combinations;(3)the establishment of a comprehensive digital design framework and process for subgrade cross-sections;and(4)the development and implementation of an open-source digital design system.Findings-The proposed method liberates subgrade design from the constraints of conventional drawing platforms,elevating efficiency,intelligence,and flexibility.The open software architecture and code have achieved over 60%efficiency gains in design workflows during its deployment on three major high-speed rail projects:the Baotou-Yinchuan HSR corridor,Shenyang-Baihe HSR network,and Weifang-Yantai HSR system.Originality/value-This paper introduces an innovative digital design methodology that enables modular and parametric design for railway subgrade sections.The proposed approach provides a digital base for the intelligent design and maintenance of the next-generation high-speed railway.
基金supported by National Natural Science Foundation of China(No.E50575234).
文摘A direct digital design method(DDDM)of worm-gear drive is proposed.It is directly based on the simulation of manufacturing process and completely different from the conventional modeling method.The loaded tooth contact analysis(LTCA)method is analyzed,in which the advanced surface to surface searching technique is included.The influence of misalignment errors and contact deformations on contact zone and transmission error(TE)is discussed.Combined modification approach on worm tooth surface is presented.By means of DDDM and LTCA,it is very conven-ient to verify the effect of worm-gear drive's modification approach.The analysis results show that,the modification in profile direction reduces the sensitivity of worm-gear drive to misalignment errors and the modification in longitudinal direction decreases the TE.Thus the optimization design of worm-gear drive can be achieved prior to the actual manufacturing process.
文摘Industry 4.0 as referred to the fourth industrial revolution has endorsed in several national manufacturing initiatives or development plans such as in Germany, the UK, USA and China. A set of important pervasive and secondary technologies for future manufacturing activities have been identified such as additive manufacturing, sensor technology,
文摘Digital design and manufacturing have been around for several decades from the numerical control of machine tools and automating engineering design in 1960s, through early Computer Aided Design （CAD）/Computer Aided Engineering analysis （CAE）/Computer Aided Manufacturing （CAM）, to modem digital design and manufacturing [1], and cloud manufacturing [2] converging into product lifecycle management （PLM） [3, 4] and Internet-enabled personalized manufacturing [5].
基金Project supported by the National Natural Science Foundation of China (No. 50905164)the Zhejiang Provincial Natural Science Foundation of China (No. Y2090835)
文摘Mandibular defect occurs more frequently in recent years,and clinical repair operations via bone transplantation are difficult to be further improved due to some intrinsic flaws.Tissue engineering,which is a hot research field of biomedical engineering,provides a new direction for mandibular defect repair.As the basis and key part of tissue engineering,scaffolds have been widely and deeply studied in regards to the basic theory,as well as the principle of biomaterial,structure,design,and fabrication method.However,little research is targeted at tissue regeneration for clinic repair operations.Since mandibular bone has a special structure,rather than uniform and regular structure in existing studies,a methodology based on tissue engineering is proposed for mandibular defect repair in this paper.Key steps regarding scaffold digital design,such as external shape design and internal microstructure design directly based on triangular meshes are discussed in detail.By analyzing the theoretical model and the measured data from the test parts fabricated by rapid prototyping,the feasibility and effectiveness of the proposed methodology are properly verified.More works about mechanical and biological improvements need to be done to promote its clinical application in future.
基金Supported by Shanghai Leading Academic Discipline Project,Project Number:T0601
文摘3D digital design for cranes’structures based on hybrid software architecture of Client/Server and Browser/Server is introduced in this paper.Based on Pro/ENGINEER platform,3D parametric model family is built to allow generation of feasible configurations of cranes’structures in Client/Server framework.Taking use of Visual C++,the second exploiting software kit provided by Pro/ENGINEER and ANSYS GUI/APDL modeling patterns,an integration method of 3D CAD and CAE is achieved,which includes regeneration of 3D parametric model,synchronous updating and analysis of FEA model.As in Browser/Server framework,the 3D CAD models of parts,components and the whole structure could also be displayed in the customer’s browser in VRML format.
基金supported in part by the General Program of Natural Science Foundation of Hubei Province,China(Grant No.2020CFB548)a Project in 2021 of Science and Technology Support Plan of Guizhou Province,China(Grant No.202158413293820389).
文摘Objective:To evaluate the clinical efficacy of the preoperative digita1 design combined with three dimensional(3D)printing models to assist percutaneous kyphoplasty(PKP)treatment for thoracolumbar compression frac tures.Methods:From January 2018 to August 2020,we obtained data of 99 patients diagnosed thoracolumbar compression fractures.These patients were divided into control group(n=50)underwent traditional PKP surgery,and observation group(n=49)underwent preoperative digital design combined with 3D printing model assisted PKP treatment.The clinical efficacy was evaluated with five parameters,including operation time,number of intraoperative radiographs,visual analogue scale(VAS)score,Cobb Angle change,and high compression rate of injured vertebrae.Results:There were statistically significant differences of operation time and number of intraoperative radio graphs between the two groups(P<0.05).For VAS score,Cobb Angle change and vertebral height compression rate,all of these three parameters were significantly improved when the patients accepted surgery teatment in two groups(P<0.05).However,there were no significant differences between control group and observation group for these three parameters either before or after surgery(P>0.05).Conclusions:Through the design of preoperative surgical guide plate and the application of 3D printing model to guide the operation,the precise design of preoperative surgical puncture site and puncture Angle of the injured vertebra was realized,the number of intraoperative radiographs was reduced,the operation time was shortened and the operation efficiency was improved.
文摘Industry 4.0 as referred to a fourth industrial revolution has endorsed in several national manufacturing development plans such as in Germany, the UK, and China. A set of important pervasive and secondary technologies for future manufacturing activities have been identified such as additive manufacturing, sensor technology, big data analytics, Internet of things, robotics, cloud computing, and nanotechnology.
基金Funded by the Natural Science Foundation of China(59685003)the Special Fund for Author of Excellent Doctoral Dissertation of China(200232).
文摘In order to obtain digital design of complex mechanical product as optimal as possible in an efficient way,multi-discipline integrated design method is proposed,which integrates multidisciplinary design optimization(MDO)into digital design process to design virtual prototype(VP)efficiently.Through combining MDO and multi-body system dynamics,MDO integra-tion platform,which takes VP as the core,is constructed.Then automated MDO design of VP is realized and changes of mechani-cal design project can be expressed intuitively during MDO design process.The proposed approach is also demonstrated by using inte-grated analyzing flow of vehicle engineering design.The result shows that the method not only can feasibly realize the MDO of VP,but also can solve the optimization problem of vehicle multi-body system dynamic performance.It can be adopted to the digital de-sign of other complex system.
文摘Mostly product design knowledge and experience exists in design handbook or expert’s brain.During design process,designer has to refer to many handbooks and design materials,and design solution is hard to be reused.In order to deal with these deficiencies in digital design,this paper focuses on knowledge-reuse-oriented product modeling and knowledge management.Design knowledge is used to guide design process,and it is embedded into product model along with design process.Through analyzing design process,mechanical product knowledge is classified into four basic types that include calculation formula,design rule,engineering check and parameter spectrum etc.In order to manage and encapsulate design knowledge the concept of knowledge component(KCOM)is proposed.Design knowledge base can be organized as a hierarchy tree of KCOM.Knowledge reuse in KCOM level is the reuse of whole object in knowledge base,and knowledge reuse in item level is the reuse of basic knowledge type.Finally knowledge reuse approaches between knowledge base and CAD system is presented.
文摘Digital design and manufacturing have been under pinned by digital modeling, simulation, and automation controls for decades. Under the new market requirement of mass customized products and services, the advancements in artificial intelligence （AI）, smart technology, virtual reality （VR）, big data, digital twin, robotics and human-centered design are becoming driving forces for the development of future digital design and manufacturing. This special issue focuses on the future digital design and manufacturing especially under the Industry 4.0 framework and beyond. This editorial introduces the papers in this special issue, which linked to the International Workshop on Digital Design and Manufacturing Technologies - Embracing Industry 4.0 and Beyond at Northumbria University in Newcastle, UK, held on 12-13 April 2016. In the Part I of the issue [1], there are 13 papers published in 2016, Vol- ume 29, No 6 of the Chinese Journal of Mechanical Engineering （this journal）.
文摘Methods used for digital ship design were studied and formed the basis of a proposed frame model suitable for ship construction modeling. Based on 3-D modeling software, a digital design system for hull structures was developed. Basic software systems for modeling, modifying, and assembly simulation were developed. The system has good compatibility, and models created by it can be saved in different 3-D file formats, and 2D engineering drawings can be output directly. The model can be modified dynamically, overcoming the necessity of repeated modifications during hull structural design. Through operations such as model construction, intervention inspection, and collision detection, problems can be identified and modified during the hull structural design stage. Technologies for centralized control of the system, database management, and 3-D digital design are integrated into this digital model in the preliminary design stage of shipbuilding.
文摘As crucial carriers of culture,ancient paintings embody profound historical narratives and aesthetic values.Yet,the lack of professional expertise often hinders non-experts from fully appreciating these works.This disconnect leads to misinterpretation and creates a barrier that diminishes the value of aesthetic education.Digital design is currently revolutionizing public engagement with ancient painting,offering transformative pathways to enhance aesthetic appreciation(Chen et al.,2025a;Tang et al.,2024).
文摘Digital design and optimal are very important in modern design.The traditional design methods and procedure are not fit for the modern missile weapons research and development.Digital design methods and optimal ideas were employed to deal with this problem.The disadvantages of the traditional missile’s airframe design procedure and the advantages of the digital design methods were discussed.A new concept of design process reengineering(DPR)was put forward.An integrated missile air-frame digital design platform and the digital design procedure,which integrated the optimization ideas and methods,were devel-oped.Case study showed that the design platform and the design procedure could improve the efficiency and quality of missile’s airframe design,and get the more reasonable and optimal results.
文摘How to design and organize the implementation of teaching is an important consideration for the quality of the course.This paper takes the“Digital Logic Design”course as an example,and carries out teaching design and practice based on the blended teaching mode.By adopting various forms such as MOOC+SPOC+theme seminars,beneficial explorations have been made in improving students’autonomous learning ability,strengthening engineering literacy,and cultivating innovation ability.
基金funded by the Natural Science and Engineering Research Council (NSERC) of Canada (No. RGPIN-2014-04100)
文摘Sampling design(SD) plays a crucial role in providing reliable input for digital soil mapping(DSM) and increasing its efficiency.Sampling design, with a predetermined sample size and consideration of budget and spatial variability, is a selection procedure for identifying a set of sample locations spread over a geographical space or with a good feature space coverage. A good feature space coverage ensures accurate estimation of regression parameters, while spatial coverage contributes to effective spatial interpolation.First, we review several statistical and geometric SDs that mainly optimize the sampling pattern in a geographical space and illustrate the strengths and weaknesses of these SDs by considering spatial coverage, simplicity, accuracy, and efficiency. Furthermore, Latin hypercube sampling, which obtains a full representation of multivariate distribution in geographical space, is described in detail for its development, improvement, and application. In addition, we discuss the fuzzy k-means sampling, response surface sampling, and Kennard-Stone sampling, which optimize sampling patterns in a feature space. We then discuss some practical applications that are mainly addressed by the conditioned Latin hypercube sampling with the flexibility and feasibility of adding multiple optimization criteria. We also discuss different methods of validation, an important stage of DSM, and conclude that an independent dataset selected from the probability sampling is superior for its free model assumptions. For future work, we recommend: 1) exploring SDs with both good spatial coverage and feature space coverage; 2) uncovering the real impacts of an SD on the integral DSM procedure;and 3) testing the feasibility and contribution of SDs in three-dimensional(3 D) DSM with variability for multiple layers.
基金supported by the National Natural Science Foundation of China (623B2028).
文摘The advanced fin-shaped field-effect transistor(FinFET)technology offers higher integration density and stronger channel control capabilities,however,more complex process effects are also introduced which have significant influence on device performance.To address these issues,we complete a design-technology co-optimization(DTCO)focused on FinFET,including both process-induced effect during gate formation and corresponding digital unit optimization design.The 14 nm Fin-FET complementary metal oxide semiconductor(CMOS)technology is used to illustrate the sensitivity of transistor perfor-mance to process-induced effect,specifically the poly pitch effect(PPE)and cut poly effect(CPE).Predictive technology com-puter aided design(TCAD)simulations have been carried out to evaluate the transistor performance in advance.Based on the results,optimizations in digital unit design is proposed.Fall delay of the digital unit inverter is decreased by 0.7%,and the rise delay is decreased by 2.1%.For multiple selector(MUX2NV),the delay decreases by 4.64%for rise and 3.56%for drop,respec-tively.
文摘The main purpose of this study was to carry out the DACUM(developing a curriculum)analysis in studying the job functions for digital media designers in Taiwan,China as a case study.The primary tasks were twofold:(A)Study the DACUM Occupational Analysis'connotation and(B)Investigate the outputs of the DACUM Occupational Analysis and establish a job function profile for digital media designers.The research method included(a)Literature Review,to review and discuss the connotation of DACUM Occupational Analysis and(b)Comparative Study,in which a variety of charts of the occupational analysis obtained from the Literature Review were compared to reach conclusions.In summary,various DACUM charts obtained from literature reviews on digital media design jobs appeared significantly different in contents of the charts.Therefore,in any future and consecutive DACUM Occupational Analysis,exiting DACUM Charts could be referenced as the starting point for the DACUM process;then the parameters such as the number of facilitators,panelists,number of tasks,job function duties,personal traits,tools and attributes,etc.should be reviewed and optimized depending on the actual requirement,local development,cultural background,local training and educational levels,etc..Hopefully the case study in establishing the job function descriptions for digital media designers in Taiwan,China presented in the Conclusion Section of this report has demonstrated this process satisfactorily.
