The pervasive diffusion of digital technologies opened up to new concepts in managing and monitoring the processes occurring in our society.Information and Communication Technologies(ICTs)become enabling tools to reth...The pervasive diffusion of digital technologies opened up to new concepts in managing and monitoring the processes occurring in our society.Information and Communication Technologies(ICTs)become enabling tools to rethink our way of living,consuming and producing goods and services.Among these,the Internet of Things(IoT)represents the disruptive technology that may redefine the stages of the building process to meet renewed environmental challenges.This new technological paradigm imports in the Architecture,Engineering and Construction(AEC)sector new and not-tectonic instances.In this context,the paper maps the experiences related to the use of IoT for managing the building process.Through a systematic literature review,the article highlights the potential benefits generable by a widespread integration of IoT in the AEC sector.In particular,the article has three purposes:defining the IoT infrastructure for its proper application in the AEC sector;identifying IoT main application domains;investigating the integration modalities.展开更多
The comprehensive tire building and shaping processes are investigated through the finite element method(FEM)in this article.The mechanical properties of the uncured rubber from different tire components are investiga...The comprehensive tire building and shaping processes are investigated through the finite element method(FEM)in this article.The mechanical properties of the uncured rubber from different tire components are investigated through cyclic loading-unloading experiments under different strain rates.Based on the experiments,an elastoviscoplastic constitutive model is adopted to describe themechanical behaviors of the uncured rubber.The distinct mechanical properties,including the stress level,hysteresis and residual strain,of the uncured rubber can all be well characterized.The whole tire building process(including component winding,rubber bladder inflation,component stitching and carcass band folding-back)and the shaping process are simulated using this constitutive model.The simulated green tire profile is in good agreement with the actual profile obtained through 3D scanning.The deformation and stress of the rubber components and the cord reinforcements during production can be obtained fromthe FE simulation,which is helpful for judging the rationality of the tire construction design.Finally,the influence of the parameter“drum width”is investigated,and the simulated result is found to be consistent with the experimental observations,which verifies the effectiveness of the simulation.The established simulation strategy provides some guiding significance for the improvement of tire design parameters and the elimination of tire production defects.展开更多
Purpose:Today,the use of e-government services is still at a low level in China.Based on the understanding that citizen trust is an important factor influencing e-government adoption,this research tries to develop a m...Purpose:Today,the use of e-government services is still at a low level in China.Based on the understanding that citizen trust is an important factor influencing e-government adoption,this research tries to develop a model of citizen trust in e-government in an effort to study the impacts of trust-related factors on citizen intentions to adopt e-government services.Design/methodology/approach:The data was collected from an online survey of 182Chinese users who had more than 3 years' online experiences of using government websites.Structural equation modeling analysis was used to validate the proposed model.Findings:Our survey shows that trust in e-government,perceived usefulness and perceived ease of use are critical factors that influence citizen intentions to use e-government services.The study findings also indicate that citizen trust in e-government is positively associated with trust in government,institution-based trust and perceived usefulness of e-government services.Research limitations:The survey sampled adults aged from 25 to 35 years old.Such a limited sample group cannot represent all of the population.So a larger sample involving more experienced online users will yield more useful results.Practical implications:The study results will help government agencies,especially the Chinese government agencies,find ways to improve the Chinese citizens' trust in e-government and promote their adoptions of e-government services.Originality/value:Previous researches have investigated separately the impacts of user evaluation of government websites and user trust in e-government on user intentions to engage in e-government.This study makes a theoretical contribution by integrating these two perspectives and building a model of citizen trust in e-government in understanding the impacts of trust-related factors on citizens' adoptions of e-government initiatives.展开更多
Value creation is a significant part of the sustainable building process.To understand the process of value creation,this paper identifies a number of important issues.First,the paper addresses the existence of and iden...Value creation is a significant part of the sustainable building process.To understand the process of value creation,this paper identifies a number of important issues.First,the paper addresses the existence of and identifies reasons for com-plexity in the process of value creation over a whole lifecycle(WLC).Then,a conceptual framework model is developed and adapted to the WLC in order to monitor building process stages and intervals.Next,the concepts and strategies lead-ing to WLC value maximization are addressed.Finally,a conceptual WLC value creation model is proposed that is based on sustainable building process stages and building asset stakeholders’benefits.The paper indicates how value cre-ated is an accumulation of values acquired through various operations over the building WLC.展开更多
文摘The pervasive diffusion of digital technologies opened up to new concepts in managing and monitoring the processes occurring in our society.Information and Communication Technologies(ICTs)become enabling tools to rethink our way of living,consuming and producing goods and services.Among these,the Internet of Things(IoT)represents the disruptive technology that may redefine the stages of the building process to meet renewed environmental challenges.This new technological paradigm imports in the Architecture,Engineering and Construction(AEC)sector new and not-tectonic instances.In this context,the paper maps the experiences related to the use of IoT for managing the building process.Through a systematic literature review,the article highlights the potential benefits generable by a widespread integration of IoT in the AEC sector.In particular,the article has three purposes:defining the IoT infrastructure for its proper application in the AEC sector;identifying IoT main application domains;investigating the integration modalities.
基金funded by the NationalNatural Science Foundation of China (Nos.11902229,11502181)the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos.XDB22040502,XDC06030200).
文摘The comprehensive tire building and shaping processes are investigated through the finite element method(FEM)in this article.The mechanical properties of the uncured rubber from different tire components are investigated through cyclic loading-unloading experiments under different strain rates.Based on the experiments,an elastoviscoplastic constitutive model is adopted to describe themechanical behaviors of the uncured rubber.The distinct mechanical properties,including the stress level,hysteresis and residual strain,of the uncured rubber can all be well characterized.The whole tire building process(including component winding,rubber bladder inflation,component stitching and carcass band folding-back)and the shaping process are simulated using this constitutive model.The simulated green tire profile is in good agreement with the actual profile obtained through 3D scanning.The deformation and stress of the rubber components and the cord reinforcements during production can be obtained fromthe FE simulation,which is helpful for judging the rationality of the tire construction design.Finally,the influence of the parameter“drum width”is investigated,and the simulated result is found to be consistent with the experimental observations,which verifies the effectiveness of the simulation.The established simulation strategy provides some guiding significance for the improvement of tire design parameters and the elimination of tire production defects.
基金supported by the National Social Science Foundation of China(No.:09&ZD039)
文摘Purpose:Today,the use of e-government services is still at a low level in China.Based on the understanding that citizen trust is an important factor influencing e-government adoption,this research tries to develop a model of citizen trust in e-government in an effort to study the impacts of trust-related factors on citizen intentions to adopt e-government services.Design/methodology/approach:The data was collected from an online survey of 182Chinese users who had more than 3 years' online experiences of using government websites.Structural equation modeling analysis was used to validate the proposed model.Findings:Our survey shows that trust in e-government,perceived usefulness and perceived ease of use are critical factors that influence citizen intentions to use e-government services.The study findings also indicate that citizen trust in e-government is positively associated with trust in government,institution-based trust and perceived usefulness of e-government services.Research limitations:The survey sampled adults aged from 25 to 35 years old.Such a limited sample group cannot represent all of the population.So a larger sample involving more experienced online users will yield more useful results.Practical implications:The study results will help government agencies,especially the Chinese government agencies,find ways to improve the Chinese citizens' trust in e-government and promote their adoptions of e-government services.Originality/value:Previous researches have investigated separately the impacts of user evaluation of government websites and user trust in e-government on user intentions to engage in e-government.This study makes a theoretical contribution by integrating these two perspectives and building a model of citizen trust in e-government in understanding the impacts of trust-related factors on citizens' adoptions of e-government initiatives.
文摘Value creation is a significant part of the sustainable building process.To understand the process of value creation,this paper identifies a number of important issues.First,the paper addresses the existence of and identifies reasons for com-plexity in the process of value creation over a whole lifecycle(WLC).Then,a conceptual framework model is developed and adapted to the WLC in order to monitor building process stages and intervals.Next,the concepts and strategies lead-ing to WLC value maximization are addressed.Finally,a conceptual WLC value creation model is proposed that is based on sustainable building process stages and building asset stakeholders’benefits.The paper indicates how value cre-ated is an accumulation of values acquired through various operations over the building WLC.
