Standard e-government information system(SEIS) including mobile-government applications are playing more and more important roles in the establishing of national e-government framework. It can be beneficial not only f...Standard e-government information system(SEIS) including mobile-government applications are playing more and more important roles in the establishing of national e-government framework. It can be beneficial not only for avoiding redundant e-government IS development but also for improving collaboration among government agencies. Two research questions were explored: what are the factors influencing the performance of SEIS? Will mandatory SEIS create a better performance than non-mandatory SEIS? Specifically, the use of five categories of IS aspects--information system quality, online service quality, offline service quality, diffusion modes and standard network size—is proposed to understand the performance of SEIS through applying both survey study and simulation study. The results show that information system quality and online service quality of SEIS have strong effects on users' expectation and users' satisfaction, which thereafter promotes the performance of SEIS. Government agencies' offline service quality shows a significant effect on users' satisfaction while not on users' expectation. Furthermore, the diffusion speed of SEIS in non-mandatory and mandatory modes and the standard network size also have great influence on the utility of SEIS.展开更多
Risk analysis of reservoir flood control operation mode with forecast information(FCOMFI)is an important basis for the design and implementation of FCOMFI.Most of current researches on this issue are incomplete as the...Risk analysis of reservoir flood control operation mode with forecast information(FCOMFI)is an important basis for the design and implementation of FCOMFI.Most of current researches on this issue are incomplete as they only consider flood forecast errors,but not many other uncertainties in reservoir routing.In order to obtain an integrated risk rate of FCOMFI,this paper analyzes four uncertainties,i.e.hydrological,hydraulic,stage-storage uncertainty and time-delay uncertainty,as well as their probability distributions.On the basis of this analysis,an integrated risk analysis model of FCOMFI for reservoirs and its lower reach is established involving the above-mentioned four uncertainties,and this model is solved by Monte Carlo simulation based on Latin hypercube sampling.The simulation results,with Baiguishan reservoir as the example,show that the integrated risk rates of FCOMFI are less than those of the flood control operation mode without forecast information.This article presents the highest limited water level that satisfies flood control safety requirements of the lower reach.展开更多
基金supported by the Natural Science Foundation of China (71103021, 71573022, 71372193, 71301106)Beijing Philosophy and Social Science Planning Foundation (13JGC085)+1 种基金Beijing Higher Education Yong Elite Teacher Foundation (YETP0852)Humanities and Social Sciences Foundation of the Ministry of Education(13YJC630034, 13YJA790023)
文摘Standard e-government information system(SEIS) including mobile-government applications are playing more and more important roles in the establishing of national e-government framework. It can be beneficial not only for avoiding redundant e-government IS development but also for improving collaboration among government agencies. Two research questions were explored: what are the factors influencing the performance of SEIS? Will mandatory SEIS create a better performance than non-mandatory SEIS? Specifically, the use of five categories of IS aspects--information system quality, online service quality, offline service quality, diffusion modes and standard network size—is proposed to understand the performance of SEIS through applying both survey study and simulation study. The results show that information system quality and online service quality of SEIS have strong effects on users' expectation and users' satisfaction, which thereafter promotes the performance of SEIS. Government agencies' offline service quality shows a significant effect on users' satisfaction while not on users' expectation. Furthermore, the diffusion speed of SEIS in non-mandatory and mandatory modes and the standard network size also have great influence on the utility of SEIS.
基金supported by"Eleventh Five-Year"Technology Support Program of China(Grant No.2006BAB14B05)
文摘Risk analysis of reservoir flood control operation mode with forecast information(FCOMFI)is an important basis for the design and implementation of FCOMFI.Most of current researches on this issue are incomplete as they only consider flood forecast errors,but not many other uncertainties in reservoir routing.In order to obtain an integrated risk rate of FCOMFI,this paper analyzes four uncertainties,i.e.hydrological,hydraulic,stage-storage uncertainty and time-delay uncertainty,as well as their probability distributions.On the basis of this analysis,an integrated risk analysis model of FCOMFI for reservoirs and its lower reach is established involving the above-mentioned four uncertainties,and this model is solved by Monte Carlo simulation based on Latin hypercube sampling.The simulation results,with Baiguishan reservoir as the example,show that the integrated risk rates of FCOMFI are less than those of the flood control operation mode without forecast information.This article presents the highest limited water level that satisfies flood control safety requirements of the lower reach.
