Huangang City is rich in ecotourism resources,in which more than 80%of ecotourism resources concentrate in poor countryside.According to the statistics,there are 4 tourism counties,15 famous tourism villages and 115 r...Huangang City is rich in ecotourism resources,in which more than 80%of ecotourism resources concentrate in poor countryside.According to the statistics,there are 4 tourism counties,15 famous tourism villages and 115 rural tourist attractions.But economic development in ecotourism scenic spots of Huanggang City is relatively backward,and the development of ecological economy is imminent,especially ecological tourism.Based on research results on poverty alleviation effect through ecological tourism at home and abroad,Huanggang City is taken as research object,and two input indexes(per capita comprehensive tourism income and per capita tourist reception)and three output indexes(per capita GDP,per capita net income of farmers,and per capita disposable income of urban residents)are used to establish evaluation index system of poverty alleviation effect through ecological tourism.Based on DEA-BCC model,11 counties(cities and districts)in Huanggang City are taken as decision-making units,and empirical analysis on poverty alleviation effect through tourism is conducted from three aspects:comprehensive efficiency,technical efficiency and scale efficiency.展开更多
A theoretical model for the translocation process of biomacromolecule is developed based on the self-consistent field theory （SCFT）, where the biomacromolecule is regarded as a self-avoiding polymer chain actuated b...A theoretical model for the translocation process of biomacromolecule is developed based on the self-consistent field theory （SCFT）, where the biomacromolecule is regarded as a self-avoiding polymer chain actuated by the external potential. In this theoretical model, the external potential, the Coulomb electrostatic potential of the charged ions （the electrolyte effect）, and the attractive interaction between the polymer and the nanopore （the excluded volume effect） are all considered, which have effects on the free energy landscape and conformation entropy during the translocation stage. The result shows that the entropy barrier of the polymer in the solution with high valence electrolyte is much larger than that with low valence electrolyte under the same condition, leading to that the translocation time of the DNA molecules in the solution increases when the valence electrolyte increases. In addition, the attractive interaction between the polymer and the nanopore increases the free energy of the polymer, which means that the probability of the translocation through the nanopore increases. The average translocation time decreases when the excluded volume effect parameter increases. The electrolyte effect can prolong the average translocation time. The simulation results agree well with the available experimental results.展开更多
基金Supported by Scientific Research Plan Project of Hubei Provincial Department of Education(Q20192903)Philosophy and Social Science Research Project of Hubei Provincial Department of Education(19Q181)+1 种基金Dabie Mountain Tourism Economic and Cultural Research Center Project of Key Research Base of Humanities and Social Sciences in Hubei Province(201829503)Doctoral Fund Project of Huanggang Normal University(2042019038)
文摘Huangang City is rich in ecotourism resources,in which more than 80%of ecotourism resources concentrate in poor countryside.According to the statistics,there are 4 tourism counties,15 famous tourism villages and 115 rural tourist attractions.But economic development in ecotourism scenic spots of Huanggang City is relatively backward,and the development of ecological economy is imminent,especially ecological tourism.Based on research results on poverty alleviation effect through ecological tourism at home and abroad,Huanggang City is taken as research object,and two input indexes(per capita comprehensive tourism income and per capita tourist reception)and three output indexes(per capita GDP,per capita net income of farmers,and per capita disposable income of urban residents)are used to establish evaluation index system of poverty alleviation effect through ecological tourism.Based on DEA-BCC model,11 counties(cities and districts)in Huanggang City are taken as decision-making units,and empirical analysis on poverty alleviation effect through tourism is conducted from three aspects:comprehensive efficiency,technical efficiency and scale efficiency.
基金supported by the National Natural Science Foundation of China(No.51375090)
文摘A theoretical model for the translocation process of biomacromolecule is developed based on the self-consistent field theory （SCFT）, where the biomacromolecule is regarded as a self-avoiding polymer chain actuated by the external potential. In this theoretical model, the external potential, the Coulomb electrostatic potential of the charged ions （the electrolyte effect）, and the attractive interaction between the polymer and the nanopore （the excluded volume effect） are all considered, which have effects on the free energy landscape and conformation entropy during the translocation stage. The result shows that the entropy barrier of the polymer in the solution with high valence electrolyte is much larger than that with low valence electrolyte under the same condition, leading to that the translocation time of the DNA molecules in the solution increases when the valence electrolyte increases. In addition, the attractive interaction between the polymer and the nanopore increases the free energy of the polymer, which means that the probability of the translocation through the nanopore increases. The average translocation time decreases when the excluded volume effect parameter increases. The electrolyte effect can prolong the average translocation time. The simulation results agree well with the available experimental results.
