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
After reviewing the phylogeny of manufacturing activities and manufacturing science and summarizing the application actuality of digital manufacturing(DM)technologies in manufacturing,the theory supporting system of d...After reviewing the phylogeny of manufacturing activities and manufacturing science and summarizing the application actuality of digital manufacturing(DM)technologies in manufacturing,the theory supporting system of digital manufacturing science(DMS)were deeply researched,including calculation manufacturing science and manufacturing informatics,bionics mechanics,manufacturing intelligent science and technical management science and so on.Then the connation of digital manufacturing technologies were dissertated,includes the digital technology set of product life-cycle,the digital manufacturing resources technology set,the manufacturing information technology set and technology characterizations of digital products.The developing directions of DMS in future were put forward at last.展开更多
Heterogeneous in nature,digitized manufacturing resources are geographically distributed,and owned by different organizations each having their own resource management policies and different access-and-cost models.In ...Heterogeneous in nature,digitized manufacturing resources are geographically distributed,and owned by different organizations each having their own resource management policies and different access-and-cost models.In this paper,by means of stateful serviceData,we make manufacturing resources as grid nodes.Considering TQCS requirements of resources in the manufacturing industry,we capture the essentials of grid resource management models and propose the TQCS market model to inquire,browse and use manufacturing resources.The manufacturing resource integration will integrate and organize the manufacture technology resource to form the core manufacture powers.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 overcome the weakness of the former production activity control （PAC） architecture, this paper presents an improved PAC architecture. The BIT-PAC architecture has been applied with the use of information...In order to overcome the weakness of the former production activity control （PAC） architecture, this paper presents an improved PAC architecture. The BIT-PAC architecture has been applied with the use of information technology. It facilitates the information flow from Shop Floor to other areas of the organization and makes the organizations more integrated and productive. This architecture also facilitates the expansion of the Shop Floor functions without disturbing the basic infrastructure. Effectiveness of the BIT-PAC architecture was checked by developing and running application software on a network PC which has supported the dynamic flow of information from Sub-Producers and Sub-Movers to other areas of organization.展开更多
Digital manufacturing technology can be used in optical field to solve many problems caused by traditional machining.According to the characters of digital manufacturing and the practical applications of ultra-precisi...Digital manufacturing technology can be used in optical field to solve many problems caused by traditional machining.According to the characters of digital manufacturing and the practical applications of ultra-precision machining,the process of digital ultra-precision machining and its technical contents were presented in this paper.In the conclusions,it was stated that the digitalization of ultra-precision machining will be an economical and efficient way for the production of new sorts of optical workpieces.展开更多
Because a ship model surface(SMS)is a large double-curved 3-D surface,the machining efficiency of the cur-rent handcraft manufacturing method are very low,and the precision is difficult to control also.In order to gre...Because a ship model surface(SMS)is a large double-curved 3-D surface,the machining efficiency of the cur-rent handcraft manufacturing method are very low,and the precision is difficult to control also.In order to greatly improve the machining efficiency and precision of SMS,based on the CAD/CAM/CNC technology,this paper proposed a model of SMS digi-tal manufacturing system,which is composed of five functional modules(preprocess module,CAD module,CAM module,post-process module and CNC module),and a twin-skeg SMS as an example,the key technologies&design principle of the nodtules were investigated also Based on the above research works,the first set of 4-axis SMS Digital Manufacturing System in China has been successfully developed,which can reduce the machining time of the twin-skeg SMS from 30 working days needed for the cur-rent handcrafting manufacturing method to 8 hours now,and which can control more effectively the precision of SMS also.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
With the globalization and diversification of the market and the rapid development of Information Technology(IT)and Artificial Intelligence(AI),the digital revolution of manufacturing is coming.One of the key technolo...With the globalization and diversification of the market and the rapid development of Information Technology(IT)and Artificial Intelligence(AI),the digital revolution of manufacturing is coming.One of the key technologies in digital manufacturing is product digital modeling.This paper firstly analyzes the information and features of the product digital model during each stage in the product whole lifecycle,then researches on the three critical technologies of digital modeling in digital man-ufacturing-product modeling,standard for the exchange of product model data and digital product data management.And the potential signification of the product digital model during the process of digital manufacturing is concluded-product digital model integrates primary features of each stage during the product whole lifecycle based on graphic features,applies STEP as data ex-change mechanism,and establishes PDM system to manage the large amount,complicated and dynamic product data to implement the product digital model data exchange,sharing and integration.展开更多
In a rational exercise, in the present paper it is extrapolated how the development of ICTs （information and communication technologies） and the incipient technological development of additive manufacturing has the ...In a rational exercise, in the present paper it is extrapolated how the development of ICTs （information and communication technologies） and the incipient technological development of additive manufacturing has the potential to change our society. In the following, it is analyzing the evolution of man over physical matter and how this has shaped our society. The main milestones or key stages in history that have marked a transcendental change in the human-machine-environment relationship have been identified and consequently have led us to ask ourselves： What is next, how far are we, and what are we capable of printing？ In an attempt to identify the current state of the art, highlighting the possibilities those additive technologies can offer.展开更多
Shop floor control （SFC） is responsible for the coordination and control of the manufacturing physical and information flow within the shop floor in the manufacturing system. Weaknesses of the production activity co...Shop floor control （SFC） is responsible for the coordination and control of the manufacturing physical and information flow within the shop floor in the manufacturing system. Weaknesses of the production activity control （PAC） architecture of the shop floor are addressed by the Maglica＇s new system architecture. This architecture gives rise to unlimited number of movers and producers thus evolving more complex but decentralized architecture. Beijing Institute of Technology - production activity control （BIT-PAC） architecture introduces an idea of sub-producars and sub-movers thus reducing the complexity of the architecture. All the equipments including sub-producars and sub-movers are considered to be passive in the proposed shop floor information system. The dissemination of information from sub-producers and sub-movers is done manually through a PC. Proposed BIT-PAC SFC architecture facilitates the information flow from shop floor to the other area of the organization. Effective use of interact information services （IIS） and SQL2000 is done along with the ASP.NET technology to implement the application logic. Applicability of the software based on BIT-PAC architecture is checked by running application software on a network PC that supports the dynamic flow of information from sub-producers and sub-movers to the other parts of the organization. Use of software is also shown at the end for BIT training workshop thus supporting the use of SFC architecture for similar kind of environments.展开更多
The paper introduces the origin of the word of Direct Digital Manufacturing and other forms of address, and the working principles of Direct Digital Manufacturing technology and major types of the technology, hard- wa...The paper introduces the origin of the word of Direct Digital Manufacturing and other forms of address, and the working principles of Direct Digital Manufacturing technology and major types of the technology, hard- ware and software development, use of materials, applications, market growth and its development prospects. Focused presentations of Direct Digital Manufacturing （additive manufacturing） compared to traditional mechani- cal manufacturing industry in the use of prices, processing speed, reliability and cost advantages and characteris- tics. Particularly the significant challenges and competitiveness of Direct Digital Manufacturing technology in the processing of any complexity created directly the number of objects, internal structure and channel function, as well as the shape of the chassis components and structure of the matching and optimization.展开更多
Blades are one of the vital components and most difficulty in manufacturing of large hydro turbines.In order to cost-effectively and productively manufacture these kinds of blades,a series of digital techniques in man...Blades are one of the vital components and most difficulty in manufacturing of large hydro turbines.In order to cost-effectively and productively manufacture these kinds of blades,a series of digital techniques in manufacturing have been devel-oped,which includes digital design of hydro turbine blades based on manufacture’requirements,Computer-aided location and the machined error evaluation by using 3-dimensional digitized measuring,tool path generation strategy to meet requirements of en-hancing machining efficiency and controlling deviation in NC machining,tool path generation and NC machining simulation by es-tablishing a virtual NC machining environment for blades,and reasonable and feasible strategy and the systematic scheme for man-ufacturing of large blades by using 5-axis simultaneous CNC machining.The developed digital manufacture techniques have been successfully applied in manufacturing of both the large Kaplan and Francis hydraulic turbine blades;it shows that higher efficiency and the better surfaces finish accuracy can be achieved.展开更多
The digital manufacturing theory is applied to the special manufacturing equipments——industrial kilns and furnaces;the concept of digital kilns&furnaces is put forward.The present status of research and applicat...The digital manufacturing theory is applied to the special manufacturing equipments——industrial kilns and furnaces;the concept of digital kilns&furnaces is put forward.The present status of research and application for digital technologies in fuel industrial kilns&furnaces is also introduced.Then,take the case of gas fuel kilns&furnaces,their main key technical issues are discussed.Digital kilns&furnaces as an important constituent of the digital equipments are the crucial base of the digital manufacturing.The value of research on digital kilns&furnaces and the application prospect are undoubted.It will improve product quality,reduce the manpower cost,enhance product market competitive ability,promote comprehensively tradition industries such as ceramics,metallurgy industry,and so on.展开更多
Digital manufacturing enterprises require high operational agility due to the intricate and dynamically changing nature of their tasks.The implementation of accurate and timely predictions of task bottlenecks is there...Digital manufacturing enterprises require high operational agility due to the intricate and dynamically changing nature of their tasks.The implementation of accurate and timely predictions of task bottlenecks is therefore crucial to enhancing overall efficiency.Due to task complexities and dynamic business environments,bottleneck prediction is a challenging issue.This study introduces a novel approach that constructs a task network from extensive data accumulated within a digital enterprise to identify and depict the complex interrelations among tasks.Based on this method,we develop a Bottleneck Spatio-Temporal Graph Convolutional Network (BTGCN) model based on deep learning methods that considers spatial features of the task network and temporal data of task execution and integrates the strengths of GCN and GRU.We find that GCN effectively learns and represents the complex topology of task networks to capture spatial dependencies,while GRU adapts to the dynamic changes in task data,accurately capturing temporal dependencies.Informed by the theory of constraints,the study applies the proposed BTGCN model to the prediction of task throughput bottlenecks in digital enterprises.Experimental results demonstrate that while the model has certain limitations,it can accurately extract spatio-temporal correlations from system data,offering advantages in bottleneck prediction over other benchmark models.展开更多
The outputs or products of an economy can be divided into services products ana gooas products （due to manufacturing, construction, agriculture and mining）. To date, the services and goods products have, for the mos...The outputs or products of an economy can be divided into services products ana gooas products （due to manufacturing, construction, agriculture and mining）. To date, the services and goods products have, for the most part, been separately mass produced. However, in contrast to the first and second industrial revolutions which respectively focused on the development and the mass production of goods, the next - or third - industrial revolution is focused on the integration of services and/or goods; it is beginning in this second decade of the 21st Century. The Third Industrial Revolution （TIR） is based on the confluence of three major technological enablers （i.e., big data analytics, adaptive services and digital manufacturing）; they underpin the integration or mass customization of services and/or goods. As detailed in an earlier paper, we regard mass customization as the simultaneous and real-time management of supply and demand chains, based on a taxonomy that can be defined in terms of its underpinning component and management foci. The benefits of real-time mass customization cannot be over-stated as goods and services become indistinguishable and are co-produced - as ＂servgoods＂ - in real-time, resulting in an overwhelming economic advantage to the industrialized countries where the consuming customers are at the same time the co-producing producers.展开更多
At present, it is projected that about 4 zettabytes （or 10^＊＊21 bytes） of digital data are being generated per year by everything from underground physics experiments to retail transactions to security cameras to ...At present, it is projected that about 4 zettabytes （or 10^＊＊21 bytes） of digital data are being generated per year by everything from underground physics experiments to retail transactions to security cameras to global positioning systems. In the U. S., major research programs are being funded to deal with big data in all five sectors （i.e., services, manufacturing, construction, agriculture and mining） of the economy. Big Data is a term applied to data sets whose size is beyond the ability of available tools to undertake their acquisition, access, analytics and/or application in a reasonable amount of time. Whereas Tien （2003） forewarned about the data rich, information poor （DRIP） problems that have been pervasive since the advent of large-scale data collections or warehouses, the DRIP conundrum has been somewhat mitigated by the Big Data approach which has unleashed information in a manner that can support informed - yet, not necessarily defensible or valid - decisions or choices. Thus, by somewhat overcoming data quality issues with data quantity, data access restrictions with on-demand cloud computing, causative analysis with correlative data analytics, and model-driven with evidence-driven applications, appropriate actions can be undertaken with the obtained information. New acquisition, access, analytics and application technologies are being developed to further Big Data as it is being employed to help resolve the 14 grand challenges （identified by the National Academy of Engineering in 2008）, underpin the 10 breakthrough technologies （compiled by the Massachusetts Institute of Technology in 2013） and support the Third Industrial Revolution of mass customization.展开更多
In an earlier paper （Tien 2012）, the author augurs that, in contrast to the first and second industrial revolutions which respectively focused on the development and the mass production of goods, the next - or third...In an earlier paper （Tien 2012）, the author augurs that, in contrast to the first and second industrial revolutions which respectively focused on the development and the mass production of goods, the next - or third - industrial revolution is focused on the integration of services and/or goods; it began in this second decade of the 21st Century. The Third Industrial Revolution （TIR） is underpinned by the integration or mass customization of services and/or goods. The benefits of real-time mass customization cannot be over-stated as goods and services become indistinguishable and are co-produced as ＂ServGoods＂, resulting in an overwhelming economic advantage to the industrialized countries where the consuming customers are at the same time the co-producing producers. Adding sensors to these ServGoods and letting them connect or communicate among themselves or with other ServGoods can result in an Intemet of Things （i.e., connected ServGoods）. A number of considerations, consequences and concerns relating to such an Intemet of Connected ServGoods are discussed herein.展开更多
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After reviewing the phylogeny of manufacturing activities and manufacturing science and summarizing the application actuality of digital manufacturing(DM)technologies in manufacturing,the theory supporting system of digital manufacturing science(DMS)were deeply researched,including calculation manufacturing science and manufacturing informatics,bionics mechanics,manufacturing intelligent science and technical management science and so on.Then the connation of digital manufacturing technologies were dissertated,includes the digital technology set of product life-cycle,the digital manufacturing resources technology set,the manufacturing information technology set and technology characterizations of digital products.The developing directions of DMS in future were put forward at last.
文摘Heterogeneous in nature,digitized manufacturing resources are geographically distributed,and owned by different organizations each having their own resource management policies and different access-and-cost models.In this paper,by means of stateful serviceData,we make manufacturing resources as grid nodes.Considering TQCS requirements of resources in the manufacturing industry,we capture the essentials of grid resource management models and propose the TQCS market model to inquire,browse and use manufacturing resources.The manufacturing resource integration will integrate and organize the manufacture technology resource to form the core manufacture powers.
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.
文摘In order to overcome the weakness of the former production activity control （PAC） architecture, this paper presents an improved PAC architecture. The BIT-PAC architecture has been applied with the use of information technology. It facilitates the information flow from Shop Floor to other areas of the organization and makes the organizations more integrated and productive. This architecture also facilitates the expansion of the Shop Floor functions without disturbing the basic infrastructure. Effectiveness of the BIT-PAC architecture was checked by developing and running application software on a network PC which has supported the dynamic flow of information from Sub-Producers and Sub-Movers to other areas of organization.
文摘Digital manufacturing technology can be used in optical field to solve many problems caused by traditional machining.According to the characters of digital manufacturing and the practical applications of ultra-precision machining,the process of digital ultra-precision machining and its technical contents were presented in this paper.In the conclusions,it was stated that the digitalization of ultra-precision machining will be an economical and efficient way for the production of new sorts of optical workpieces.
文摘Because a ship model surface(SMS)is a large double-curved 3-D surface,the machining efficiency of the cur-rent handcraft manufacturing method are very low,and the precision is difficult to control also.In order to greatly improve the machining efficiency and precision of SMS,based on the CAD/CAM/CNC technology,this paper proposed a model of SMS digi-tal manufacturing system,which is composed of five functional modules(preprocess module,CAD module,CAM module,post-process module and CNC module),and a twin-skeg SMS as an example,the key technologies&design principle of the nodtules were investigated also Based on the above research works,the first set of 4-axis SMS Digital Manufacturing System in China has been successfully developed,which can reduce the machining time of the twin-skeg SMS from 30 working days needed for the cur-rent handcrafting manufacturing method to 8 hours now,and which can control more effectively the precision of SMS also.
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With the globalization and diversification of the market and the rapid development of Information Technology(IT)and Artificial Intelligence(AI),the digital revolution of manufacturing is coming.One of the key technologies in digital manufacturing is product digital modeling.This paper firstly analyzes the information and features of the product digital model during each stage in the product whole lifecycle,then researches on the three critical technologies of digital modeling in digital man-ufacturing-product modeling,standard for the exchange of product model data and digital product data management.And the potential signification of the product digital model during the process of digital manufacturing is concluded-product digital model integrates primary features of each stage during the product whole lifecycle based on graphic features,applies STEP as data ex-change mechanism,and establishes PDM system to manage the large amount,complicated and dynamic product data to implement the product digital model data exchange,sharing and integration.
文摘In a rational exercise, in the present paper it is extrapolated how the development of ICTs （information and communication technologies） and the incipient technological development of additive manufacturing has the potential to change our society. In the following, it is analyzing the evolution of man over physical matter and how this has shaped our society. The main milestones or key stages in history that have marked a transcendental change in the human-machine-environment relationship have been identified and consequently have led us to ask ourselves： What is next, how far are we, and what are we capable of printing？ In an attempt to identify the current state of the art, highlighting the possibilities those additive technologies can offer.
基金This project is supported by Beijing City Key Discipline Fund, China (No.XK100070424).
文摘Shop floor control （SFC） is responsible for the coordination and control of the manufacturing physical and information flow within the shop floor in the manufacturing system. Weaknesses of the production activity control （PAC） architecture of the shop floor are addressed by the Maglica＇s new system architecture. This architecture gives rise to unlimited number of movers and producers thus evolving more complex but decentralized architecture. Beijing Institute of Technology - production activity control （BIT-PAC） architecture introduces an idea of sub-producars and sub-movers thus reducing the complexity of the architecture. All the equipments including sub-producars and sub-movers are considered to be passive in the proposed shop floor information system. The dissemination of information from sub-producers and sub-movers is done manually through a PC. Proposed BIT-PAC SFC architecture facilitates the information flow from shop floor to the other area of the organization. Effective use of interact information services （IIS） and SQL2000 is done along with the ASP.NET technology to implement the application logic. Applicability of the software based on BIT-PAC architecture is checked by running application software on a network PC that supports the dynamic flow of information from sub-producers and sub-movers to the other parts of the organization. Use of software is also shown at the end for BIT training workshop thus supporting the use of SFC architecture for similar kind of environments.
文摘The paper introduces the origin of the word of Direct Digital Manufacturing and other forms of address, and the working principles of Direct Digital Manufacturing technology and major types of the technology, hard- ware and software development, use of materials, applications, market growth and its development prospects. Focused presentations of Direct Digital Manufacturing （additive manufacturing） compared to traditional mechani- cal manufacturing industry in the use of prices, processing speed, reliability and cost advantages and characteris- tics. Particularly the significant challenges and competitiveness of Direct Digital Manufacturing technology in the processing of any complexity created directly the number of objects, internal structure and channel function, as well as the shape of the chassis components and structure of the matching and optimization.
基金Supported by the National Natural Science Foundation of China(NSFC,Grant No.59493704)partially supported by the Key Project of"National Ninth-Five Year Plan"in China(Grant No.97-312-01)the Natural Science Foundation of Sichuan Provincial Department of Education(Grant No.2004A113)
文摘Blades are one of the vital components and most difficulty in manufacturing of large hydro turbines.In order to cost-effectively and productively manufacture these kinds of blades,a series of digital techniques in manufacturing have been devel-oped,which includes digital design of hydro turbine blades based on manufacture’requirements,Computer-aided location and the machined error evaluation by using 3-dimensional digitized measuring,tool path generation strategy to meet requirements of en-hancing machining efficiency and controlling deviation in NC machining,tool path generation and NC machining simulation by es-tablishing a virtual NC machining environment for blades,and reasonable and feasible strategy and the systematic scheme for man-ufacturing of large blades by using 5-axis simultaneous CNC machining.The developed digital manufacture techniques have been successfully applied in manufacturing of both the large Kaplan and Francis hydraulic turbine blades;it shows that higher efficiency and the better surfaces finish accuracy can be achieved.
文摘The digital manufacturing theory is applied to the special manufacturing equipments——industrial kilns and furnaces;the concept of digital kilns&furnaces is put forward.The present status of research and application for digital technologies in fuel industrial kilns&furnaces is also introduced.Then,take the case of gas fuel kilns&furnaces,their main key technical issues are discussed.Digital kilns&furnaces as an important constituent of the digital equipments are the crucial base of the digital manufacturing.The value of research on digital kilns&furnaces and the application prospect are undoubted.It will improve product quality,reduce the manpower cost,enhance product market competitive ability,promote comprehensively tradition industries such as ceramics,metallurgy industry,and so on.
基金supported by the National Natural Science Foundation of China(Grant Nos.72432004 and 72372060)。
文摘Digital manufacturing enterprises require high operational agility due to the intricate and dynamically changing nature of their tasks.The implementation of accurate and timely predictions of task bottlenecks is therefore crucial to enhancing overall efficiency.Due to task complexities and dynamic business environments,bottleneck prediction is a challenging issue.This study introduces a novel approach that constructs a task network from extensive data accumulated within a digital enterprise to identify and depict the complex interrelations among tasks.Based on this method,we develop a Bottleneck Spatio-Temporal Graph Convolutional Network (BTGCN) model based on deep learning methods that considers spatial features of the task network and temporal data of task execution and integrates the strengths of GCN and GRU.We find that GCN effectively learns and represents the complex topology of task networks to capture spatial dependencies,while GRU adapts to the dynamic changes in task data,accurately capturing temporal dependencies.Informed by the theory of constraints,the study applies the proposed BTGCN model to the prediction of task throughput bottlenecks in digital enterprises.Experimental results demonstrate that while the model has certain limitations,it can accurately extract spatio-temporal correlations from system data,offering advantages in bottleneck prediction over other benchmark models.
文摘The outputs or products of an economy can be divided into services products ana gooas products （due to manufacturing, construction, agriculture and mining）. To date, the services and goods products have, for the most part, been separately mass produced. However, in contrast to the first and second industrial revolutions which respectively focused on the development and the mass production of goods, the next - or third - industrial revolution is focused on the integration of services and/or goods; it is beginning in this second decade of the 21st Century. The Third Industrial Revolution （TIR） is based on the confluence of three major technological enablers （i.e., big data analytics, adaptive services and digital manufacturing）; they underpin the integration or mass customization of services and/or goods. As detailed in an earlier paper, we regard mass customization as the simultaneous and real-time management of supply and demand chains, based on a taxonomy that can be defined in terms of its underpinning component and management foci. The benefits of real-time mass customization cannot be over-stated as goods and services become indistinguishable and are co-produced - as ＂servgoods＂ - in real-time, resulting in an overwhelming economic advantage to the industrialized countries where the consuming customers are at the same time the co-producing producers.
文摘At present, it is projected that about 4 zettabytes （or 10^＊＊21 bytes） of digital data are being generated per year by everything from underground physics experiments to retail transactions to security cameras to global positioning systems. In the U. S., major research programs are being funded to deal with big data in all five sectors （i.e., services, manufacturing, construction, agriculture and mining） of the economy. Big Data is a term applied to data sets whose size is beyond the ability of available tools to undertake their acquisition, access, analytics and/or application in a reasonable amount of time. Whereas Tien （2003） forewarned about the data rich, information poor （DRIP） problems that have been pervasive since the advent of large-scale data collections or warehouses, the DRIP conundrum has been somewhat mitigated by the Big Data approach which has unleashed information in a manner that can support informed - yet, not necessarily defensible or valid - decisions or choices. Thus, by somewhat overcoming data quality issues with data quantity, data access restrictions with on-demand cloud computing, causative analysis with correlative data analytics, and model-driven with evidence-driven applications, appropriate actions can be undertaken with the obtained information. New acquisition, access, analytics and application technologies are being developed to further Big Data as it is being employed to help resolve the 14 grand challenges （identified by the National Academy of Engineering in 2008）, underpin the 10 breakthrough technologies （compiled by the Massachusetts Institute of Technology in 2013） and support the Third Industrial Revolution of mass customization.
文摘In an earlier paper （Tien 2012）, the author augurs that, in contrast to the first and second industrial revolutions which respectively focused on the development and the mass production of goods, the next - or third - industrial revolution is focused on the integration of services and/or goods; it began in this second decade of the 21st Century. The Third Industrial Revolution （TIR） is underpinned by the integration or mass customization of services and/or goods. The benefits of real-time mass customization cannot be over-stated as goods and services become indistinguishable and are co-produced as ＂ServGoods＂, resulting in an overwhelming economic advantage to the industrialized countries where the consuming customers are at the same time the co-producing producers. Adding sensors to these ServGoods and letting them connect or communicate among themselves or with other ServGoods can result in an Intemet of Things （i.e., connected ServGoods）. A number of considerations, consequences and concerns relating to such an Intemet of Connected ServGoods are discussed herein.
