The digital reconstruction of value chain plays an important role in achieving the goal of moving up the value chain in participatory manufacturing enterprises(PMEs).This study aims to investigate the configuration pa...The digital reconstruction of value chain plays an important role in achieving the goal of moving up the value chain in participatory manufacturing enterprises(PMEs).This study aims to investigate the configuration path for the realization of the digital reconstruction performance of value chain in PMEs.Taking 122 PMEs embedded in the Haier CosMoPlat ecosystem as research objects,we change the traditional research perspective and use fuzzy-set qualitative comparative analysis to explore how technology resources,information resources,relationship resources,and digital services provided by industrial internet platform empowerment synergistically affect the digital reconstruction performance of enterprise value chain.This study obtains two groups of high(non-high)performance,namely,product-driven and service-driven;and relationship-trapped and information-trapped.The results show that the impact of industrial internet platform empowerment on the digital reconstruction performance of value chain exhibits equifinality across PMEs at different levels and stages of development.展开更多
Optic radiation（OR）injury can occur following various brain injuries and it is usually accompanied by visual field defects（Zhang et al.,2006）.OR is very important for performing activities of daily living and prov...Optic radiation（OR）injury can occur following various brain injuries and it is usually accompanied by visual field defects（Zhang et al.,2006）.OR is very important for performing activities of daily living and providing safety.展开更多
Tunnel horizontal convergence monitoring is essential to ensure the operation safety.However,only a few representative tunnel sec-tions are chosen for monitoring due to the cost limitation.It is difficult to capture t...Tunnel horizontal convergence monitoring is essential to ensure the operation safety.However,only a few representative tunnel sec-tions are chosen for monitoring due to the cost limitation.It is difficult to capture the horizontal convergence of each tunnel ring with limited measurements.Confronted with this difficulty,the paper proposes a horizontal convergence reconstruction method based on the measurements of deployed sensors.The tunnel horizontal convergence along the longitudinal direction is seen as a one-dimensional sta-tionary and ergodic random field.The reconstruction problem is then transformed into the generation of conditional random fields.Monte Carlo simulation is adopted to generate possible realizations and the mean of realizations is considered as the maximum likeli-hood reconstruction.Error analysis proves the effectiveness of the proposed reconstruction method.The proposed method is proved to be applicable in reconstructing the time-variant horizontal convergence and is verified by the monitoring results of the shield tunnel of Shanghai Metro Line 2.The effect of sensor numbers is parametrically studied,and an optimal sensor placement scheme is decided.Additional sensors placed at the deformation drastically changed location can significantly improve the performance of the proposed method.展开更多
An algorithm is proposed for the fast reconstruction of off-axis digital holograms based on a combination of complex encoding（CE） and spatial multiplexing（SM）. In this algorithm, every two off-axis holograms recor...An algorithm is proposed for the fast reconstruction of off-axis digital holograms based on a combination of complex encoding（CE） and spatial multiplexing（SM）. In this algorithm, every two off-axis holograms recorded in sequence are first assembled into a CE hologram using the CE method, and then four of the CE holograms are again encoded into one complex spatial multiplexing（CSM） hologram based on the SM algorithm. It is demonstrated that the eight holograms encoded into such one CSM hologram can be quickly reconstructed by performing a two-dimensional（2D） Fourier transform（FT） on the CSM hologram. Using this method, the eight 2D FTs required for the reconstruction of the eight holograms in the conventional spatial filtering methods can be simplified to a process with only one 2D FT, which can largely improve the computation efficiency with the展开更多
基金supported by the key project of the National Natural Science Foundation of China(No.72332001)the General Project of the National Natural Science Foundation of China(No.72172031)the National Postdoctoral Program for Innovative Talents(No.GZC20231564).
文摘The digital reconstruction of value chain plays an important role in achieving the goal of moving up the value chain in participatory manufacturing enterprises(PMEs).This study aims to investigate the configuration path for the realization of the digital reconstruction performance of value chain in PMEs.Taking 122 PMEs embedded in the Haier CosMoPlat ecosystem as research objects,we change the traditional research perspective and use fuzzy-set qualitative comparative analysis to explore how technology resources,information resources,relationship resources,and digital services provided by industrial internet platform empowerment synergistically affect the digital reconstruction performance of enterprise value chain.This study obtains two groups of high(non-high)performance,namely,product-driven and service-driven;and relationship-trapped and information-trapped.The results show that the impact of industrial internet platform empowerment on the digital reconstruction performance of value chain exhibits equifinality across PMEs at different levels and stages of development.
基金supported by the National Research Foundation(NRF)of Korea Grant funded by the Korean Government(MSIP),No.2015R1A2A2A01004073
文摘Optic radiation（OR）injury can occur following various brain injuries and it is usually accompanied by visual field defects（Zhang et al.,2006）.OR is very important for performing activities of daily living and providing safety.
基金supported by the National Key R&D Program of China(Grant No.2022YFC3801000)Natural Science Foundation Committee Program of China(Grant No.51978530,52022070)and China Scholarship Council.
文摘Tunnel horizontal convergence monitoring is essential to ensure the operation safety.However,only a few representative tunnel sec-tions are chosen for monitoring due to the cost limitation.It is difficult to capture the horizontal convergence of each tunnel ring with limited measurements.Confronted with this difficulty,the paper proposes a horizontal convergence reconstruction method based on the measurements of deployed sensors.The tunnel horizontal convergence along the longitudinal direction is seen as a one-dimensional sta-tionary and ergodic random field.The reconstruction problem is then transformed into the generation of conditional random fields.Monte Carlo simulation is adopted to generate possible realizations and the mean of realizations is considered as the maximum likeli-hood reconstruction.Error analysis proves the effectiveness of the proposed reconstruction method.The proposed method is proved to be applicable in reconstructing the time-variant horizontal convergence and is verified by the monitoring results of the shield tunnel of Shanghai Metro Line 2.The effect of sensor numbers is parametrically studied,and an optimal sensor placement scheme is decided.Additional sensors placed at the deformation drastically changed location can significantly improve the performance of the proposed method.
基金supported by National Natural Science Foundation of China under Grant No.11474186
文摘An algorithm is proposed for the fast reconstruction of off-axis digital holograms based on a combination of complex encoding（CE） and spatial multiplexing（SM）. In this algorithm, every two off-axis holograms recorded in sequence are first assembled into a CE hologram using the CE method, and then four of the CE holograms are again encoded into one complex spatial multiplexing（CSM） hologram based on the SM algorithm. It is demonstrated that the eight holograms encoded into such one CSM hologram can be quickly reconstructed by performing a two-dimensional（2D） Fourier transform（FT） on the CSM hologram. Using this method, the eight 2D FTs required for the reconstruction of the eight holograms in the conventional spatial filtering methods can be simplified to a process with only one 2D FT, which can largely improve the computation efficiency with the
