The asymptotic normality of the fixed number of the maximum likelihood estimators(MLEs)in the directed finite weighted network models with an increasing bi-degree sequence has been established recently.In this article...The asymptotic normality of the fixed number of the maximum likelihood estimators(MLEs)in the directed finite weighted network models with an increasing bi-degree sequence has been established recently.In this article,we further derive the central limit theorem for linear combinations of all the MLEs with an increasing dimension when the edges take finite discrete weight.Simulation studies are provided to illustrate the asymptotic results.展开更多
According to a Guangxi Daily report on February 26,enterprises in Guangxi cut their electricity costs by RMB 24.40 million in the first half of 2017 at a price RMB 0.027 lower per kilowatt hour for directly-purchased ...According to a Guangxi Daily report on February 26,enterprises in Guangxi cut their electricity costs by RMB 24.40 million in the first half of 2017 at a price RMB 0.027 lower per kilowatt hour for directly-purchased electricity and cut their electricity costs by more than RMB 47.60 million in the second half of 2017 at a price RMB 0.133 lower展开更多
The news of China now being the world’s largest auto market may be good for the country’s automobile industries, but more people say it’s not good for roads and the environment.
This article presents analyses on dynamics of family households and elderly living arrangements in China mainly based on the micro data of 2010,2000 and 1990 censuses.We demonstrate and discuss the trends and rural-ur...This article presents analyses on dynamics of family households and elderly living arrangements in China mainly based on the micro data of 2010,2000 and 1990 censuses.We demonstrate and discuss the trends and rural-urban differentials of largely declined household size,quickly increasing one-person and one-couple-only households,substantially increased proportions of elderly living alone or with spouse only.It is strikingly interesting that proportion of three-generation family households increased by 18.9%in rural area but decreased by 23.7%in urban areas in 2010 compared to 1990,due to rural-urban differences in demographic effects of large fertility decline and socioeconomic/attitude changes.We also present and discuss two interesting demographic phenomenon which were relatively overlooked in the literature.First,increase in number of households is much larger than population growth,due to shrinking of the household size and decomposition of larger families into smaller ones,and very much slowed-down population growth.Second,increases in numbers of elderly(especially oldest-old)who live alone or with spouse only are dramatically larger than the increase in the corresponding proportions,due to the effects of rapid population aging,while later and larger birth cohorts become old.Such trends have important implications for the analyses on the current and future market demands of the products and services,of which households are the consumption units.We recommend that the studies on home-based energy use and sustainable development should be based on analyses of family household dynamics rather than population growth.展开更多
基金Luo's research is partially supported by the Fundamental Research Funds for the Central Universities(South-Central University for Nationalities(CZQ19010))National Natural Science Foundation of China(11801576)+2 种基金the Scientific Research Funds of South-Central University For Nationalities(YZZ17007)Qin's research is partially supported by National Natural Science Foundation of China(11871237)Wang's research is partially supported by the Fundamental Research Funds for the Central Universities(South-Central University for Nationalities(CZQ18017)).
文摘The asymptotic normality of the fixed number of the maximum likelihood estimators(MLEs)in the directed finite weighted network models with an increasing bi-degree sequence has been established recently.In this article,we further derive the central limit theorem for linear combinations of all the MLEs with an increasing dimension when the edges take finite discrete weight.Simulation studies are provided to illustrate the asymptotic results.
文摘According to a Guangxi Daily report on February 26,enterprises in Guangxi cut their electricity costs by RMB 24.40 million in the first half of 2017 at a price RMB 0.027 lower per kilowatt hour for directly-purchased electricity and cut their electricity costs by more than RMB 47.60 million in the second half of 2017 at a price RMB 0.133 lower
文摘The news of China now being the world’s largest auto market may be good for the country’s automobile industries, but more people say it’s not good for roads and the environment.
基金supported by National Natural Sciences Foundation of China(71490732).
文摘This article presents analyses on dynamics of family households and elderly living arrangements in China mainly based on the micro data of 2010,2000 and 1990 censuses.We demonstrate and discuss the trends and rural-urban differentials of largely declined household size,quickly increasing one-person and one-couple-only households,substantially increased proportions of elderly living alone or with spouse only.It is strikingly interesting that proportion of three-generation family households increased by 18.9%in rural area but decreased by 23.7%in urban areas in 2010 compared to 1990,due to rural-urban differences in demographic effects of large fertility decline and socioeconomic/attitude changes.We also present and discuss two interesting demographic phenomenon which were relatively overlooked in the literature.First,increase in number of households is much larger than population growth,due to shrinking of the household size and decomposition of larger families into smaller ones,and very much slowed-down population growth.Second,increases in numbers of elderly(especially oldest-old)who live alone or with spouse only are dramatically larger than the increase in the corresponding proportions,due to the effects of rapid population aging,while later and larger birth cohorts become old.Such trends have important implications for the analyses on the current and future market demands of the products and services,of which households are the consumption units.We recommend that the studies on home-based energy use and sustainable development should be based on analyses of family household dynamics rather than population growth.
