In this paper,the fixed_point theorem is used to estimated an asymptotic solution of initial value problems for a class of third nonlinear differential equations which has double initial_layer properties. We obtain th...In this paper,the fixed_point theorem is used to estimated an asymptotic solution of initial value problems for a class of third nonlinear differential equations which has double initial_layer properties. We obtain the uniformly valid asymptotic expansion of any orders including boundary layers.展开更多
Our aging process, at the same time, the number of single elderly population is increasing year by year, which makes the elderly remarriage problem becomes more serious. With the acceleration of urbanization process i...Our aging process, at the same time, the number of single elderly population is increasing year by year, which makes the elderly remarriage problem becomes more serious. With the acceleration of urbanization process in China, economic development gap between urban and rural areas is widening, resulting in a lot of social problems, of which there are a lot of weak social groups in the cultural and economic level is relatively backward rural areas. Thought to be bound by their material conditions is not high, in the face of social problems even more weak, and they lost even among the elderly also faces remarry rare status quo. Rural elderly remarriage can be resolved related to quality of life and how happy they are old age, so this research will focus on the vast rural areas. After the Rongcheng County of Baoding, Hebei Province and five ordinary village Yixian interviews conducted, combined with a large research literature summed up his own research ideas and research methods. Find out China＇s rural elderly remarriage even lose relevance, problems and influence factors, and the corresponding countermeasures and suggestions： the elderly themselves from both the individual and the external environment to solve. Elderly people to establish a correct view of marriage and spouse, and actively carry out another marriage personal preparation. External environmental needs of the family, society and country in three areas to work together to form a joint force to support the establishment of Trinity molding system from three angles.展开更多
文摘In this paper,the fixed_point theorem is used to estimated an asymptotic solution of initial value problems for a class of third nonlinear differential equations which has double initial_layer properties. We obtain the uniformly valid asymptotic expansion of any orders including boundary layers.
文摘Our aging process, at the same time, the number of single elderly population is increasing year by year, which makes the elderly remarriage problem becomes more serious. With the acceleration of urbanization process in China, economic development gap between urban and rural areas is widening, resulting in a lot of social problems, of which there are a lot of weak social groups in the cultural and economic level is relatively backward rural areas. Thought to be bound by their material conditions is not high, in the face of social problems even more weak, and they lost even among the elderly also faces remarry rare status quo. Rural elderly remarriage can be resolved related to quality of life and how happy they are old age, so this research will focus on the vast rural areas. After the Rongcheng County of Baoding, Hebei Province and five ordinary village Yixian interviews conducted, combined with a large research literature summed up his own research ideas and research methods. Find out China＇s rural elderly remarriage even lose relevance, problems and influence factors, and the corresponding countermeasures and suggestions： the elderly themselves from both the individual and the external environment to solve. Elderly people to establish a correct view of marriage and spouse, and actively carry out another marriage personal preparation. External environmental needs of the family, society and country in three areas to work together to form a joint force to support the establishment of Trinity molding system from three angles.
