As urbanization expands＇ into the suburbs of Chinese cities, the conversion of farmers into citizens with urban social protection is becoming an important issue facing Chinese megacities. Taking Beijing as an example...As urbanization expands＇ into the suburbs of Chinese cities, the conversion of farmers into citizens with urban social protection is becoming an important issue facing Chinese megacities. Taking Beijing as an example, this paper has calculated the one-off urbanization cost of farmers in China and arrived at the results of 500, 000 yuan per person for urbanization of centralized target regions in the suburb and 200, 000 yuan per person for urbanization of scattered target regions in the exurb. This paper considers that a diversified cost sharing mechanism should be put into place for the step-by-step urbanization of farmers. In addition, policy recommendations are proposed regarding the functional transformation of collective economic organizations, eradication of the urban-rural divide, enhancement of land system innovation and policy improvements for urbanization of rural residents.展开更多
To solve dynamic optimization problem of chemical process (CPDOP), a hybrid differential evolution algorithm, which is integrated with Alopex and named as Alopex-DE, was proposed. In Alopex-DE, each original individua...To solve dynamic optimization problem of chemical process (CPDOP), a hybrid differential evolution algorithm, which is integrated with Alopex and named as Alopex-DE, was proposed. In Alopex-DE, each original individual has its own symbiotic individual, which consists of control parameters. Differential evolution operator is applied for the original individuals to search the global optimization solution. Alopex algorithm is used to co-evolve the symbiotic individuals during the original individual evolution and enhance the fitness of the original individuals. Thus, control parameters are self-adaptively adjusted by Alopex to obtain the real-time optimum values for the original population. To illustrate the whole performance of Alopex-DE, several varietal DEs were applied to optimize 13 benchmark functions. The results show that the whole performance of Alopex-DE is the best. Further, Alopex-DE was applied to solve 4 typical CPDOPs, and the effect of the discrete time degree on the optimization solution was analyzed. The satisfactory result is obtained.展开更多
In this paper, we show the invariance principle for the partial sum processes of fractionally integrated processes, otherwise known as I(d + m) processes, where |d| < 1/2 and m is a nonnegative integer, with strong...In this paper, we show the invariance principle for the partial sum processes of fractionally integrated processes, otherwise known as I(d + m) processes, where |d| < 1/2 and m is a nonnegative integer, with strong near-epoch dependent innovations. The results are applied to the test of unit root. The conditions given improve previous results in the literature concerning fractionally integrated processes.展开更多
基金supported by CASS Innovation Project"Study on the Evaluation and Improvement of Urbanization Quality in the Chinese Mainland."
文摘As urbanization expands＇ into the suburbs of Chinese cities, the conversion of farmers into citizens with urban social protection is becoming an important issue facing Chinese megacities. Taking Beijing as an example, this paper has calculated the one-off urbanization cost of farmers in China and arrived at the results of 500, 000 yuan per person for urbanization of centralized target regions in the suburb and 200, 000 yuan per person for urbanization of scattered target regions in the exurb. This paper considers that a diversified cost sharing mechanism should be put into place for the step-by-step urbanization of farmers. In addition, policy recommendations are proposed regarding the functional transformation of collective economic organizations, eradication of the urban-rural divide, enhancement of land system innovation and policy improvements for urbanization of rural residents.
基金Project(2013CB733600) supported by the National Basic Research Program of ChinaProject(21176073) supported by the National Natural Science Foundation of China+2 种基金Project(20090074110005) supported by Doctoral Fund of Ministry of Education of ChinaProject(NCET-09-0346) supported by Program for New Century Excellent Talents in University of ChinaProject(09SG29) supported by "Shu Guang", China
文摘To solve dynamic optimization problem of chemical process (CPDOP), a hybrid differential evolution algorithm, which is integrated with Alopex and named as Alopex-DE, was proposed. In Alopex-DE, each original individual has its own symbiotic individual, which consists of control parameters. Differential evolution operator is applied for the original individuals to search the global optimization solution. Alopex algorithm is used to co-evolve the symbiotic individuals during the original individual evolution and enhance the fitness of the original individuals. Thus, control parameters are self-adaptively adjusted by Alopex to obtain the real-time optimum values for the original population. To illustrate the whole performance of Alopex-DE, several varietal DEs were applied to optimize 13 benchmark functions. The results show that the whole performance of Alopex-DE is the best. Further, Alopex-DE was applied to solve 4 typical CPDOPs, and the effect of the discrete time degree on the optimization solution was analyzed. The satisfactory result is obtained.
基金supported by National Social Science Foundation of China (Grant No.07CTJ001)National Research Project for Statistics (Grant No. 2009LY056)National Natural Science Foundation of China (Grant Nos. 10901136, 71072113)
文摘In this paper, we show the invariance principle for the partial sum processes of fractionally integrated processes, otherwise known as I(d + m) processes, where |d| < 1/2 and m is a nonnegative integer, with strong near-epoch dependent innovations. The results are applied to the test of unit root. The conditions given improve previous results in the literature concerning fractionally integrated processes.
