In order to understand the status of business model and scale business of maize in Shiyan City,Hubei Province,the situation of maize production in 314 households of 6 counties and cities of Shiyan City was investigate...In order to understand the status of business model and scale business of maize in Shiyan City,Hubei Province,the situation of maize production in 314 households of 6 counties and cities of Shiyan City was investigated in terms of rural basic situation,business models,economic benefits and scale business. Targeting at the actual problems in business models and scale business,corresponding countermeasures of actively promoting the construction of industrialized business mechanism,improving the construction of agricultural infrastructure,strengthening land transfer management and promoting scientific and technological progress and innovation were put forward to provide reference for the future scale development of maize in Shiyan City.展开更多
In order to study the current situation of land transfer in the process of agricultural industrialization in the Qinling-Daba Mountains(Shiyan),27 villages of 14 townships(towns) of six counties(cities) were visited a...In order to study the current situation of land transfer in the process of agricultural industrialization in the Qinling-Daba Mountains(Shiyan),27 villages of 14 townships(towns) of six counties(cities) were visited and investigated through questionnaires,and the current situation and characteristics of land transfer among large professional households( large grain producers),family farms,agricultural enterprises and cooperatives in the process of agricultural industrialization were analyzed and summarized. The main issues affecting land transfer were summarized,such as big difference of inflow and outflow will,single way of land transfer,high cost of planting,weak agricultural infrastructure,a lack of production and operation technology,insufficient funds and short land transfer period,and imperfect social security system.Meanwhile,some countermeasures were proposed,such as improving land transfer system,precise subsidy policy and social security mechanism of Shiyan City,guiding long-term and normalized land transfer,strengthening training of professional skills and improving the quality of human resources,actively promoting the " three-township project",and attracting the investment in land transfer projects.展开更多
To enhance the mechanical properties of three-dimensional graphene aerogels with aramid fibers, graphene/organic fiber aerogels are prepared by chemical reduction of graphene oxide in the presence of organic fibers of...To enhance the mechanical properties of three-dimensional graphene aerogels with aramid fibers, graphene/organic fiber aerogels are prepared by chemical reduction of graphene oxide in the presence of organic fibers of poly（p-phenylene terephthalamide） （PPTA） and followed by freeze-drying. Thermal annealing of the composite aerogels at 1300℃ is adopted not only to restore the conductivity of the reduced graphene oxide component but also to convert the insulating PPTA organic fibers to conductive carbon fibers by the carbonization. The resultant graphene/carbon fiber aerogels （GCFAs） exhibit high electrical conductivities and enhanced compressive properties, which are highly efficient in improving both mechanical and electrical performances of epoxy composites. Compared to those of neat epoxy, the compressive modulus, compressive strength and energy absorption of the electrically conductive GCFA/epoxy composite are significantly increased by 60%, 59% and 131%, respectively.展开更多
基金Supported by Hubei Provincial Collaborative Innovation Center for Industrialization of Major Grain Crops(2014.5.13)Technical Innovation Fund of Department of Science and Technology of Hubei Province(2017ABA070)
文摘In order to understand the status of business model and scale business of maize in Shiyan City,Hubei Province,the situation of maize production in 314 households of 6 counties and cities of Shiyan City was investigated in terms of rural basic situation,business models,economic benefits and scale business. Targeting at the actual problems in business models and scale business,corresponding countermeasures of actively promoting the construction of industrialized business mechanism,improving the construction of agricultural infrastructure,strengthening land transfer management and promoting scientific and technological progress and innovation were put forward to provide reference for the future scale development of maize in Shiyan City.
基金Supported by the Project of Hubei Provincial Department of EducationHubei Provincial Department of Finance"Hubei Collaborative Innovation Center for Industrialization of Major Food Crops(2014.5)"
文摘In order to study the current situation of land transfer in the process of agricultural industrialization in the Qinling-Daba Mountains(Shiyan),27 villages of 14 townships(towns) of six counties(cities) were visited and investigated through questionnaires,and the current situation and characteristics of land transfer among large professional households( large grain producers),family farms,agricultural enterprises and cooperatives in the process of agricultural industrialization were analyzed and summarized. The main issues affecting land transfer were summarized,such as big difference of inflow and outflow will,single way of land transfer,high cost of planting,weak agricultural infrastructure,a lack of production and operation technology,insufficient funds and short land transfer period,and imperfect social security system.Meanwhile,some countermeasures were proposed,such as improving land transfer system,precise subsidy policy and social security mechanism of Shiyan City,guiding long-term and normalized land transfer,strengthening training of professional skills and improving the quality of human resources,actively promoting the " three-township project",and attracting the investment in land transfer projects.
基金financially supported by the National Key Research and Development Program of China(No.2016YFC0801302)the National Natural Science Foundation of China(Nos.51403016,51533001 and 51521062)
文摘To enhance the mechanical properties of three-dimensional graphene aerogels with aramid fibers, graphene/organic fiber aerogels are prepared by chemical reduction of graphene oxide in the presence of organic fibers of poly（p-phenylene terephthalamide） （PPTA） and followed by freeze-drying. Thermal annealing of the composite aerogels at 1300℃ is adopted not only to restore the conductivity of the reduced graphene oxide component but also to convert the insulating PPTA organic fibers to conductive carbon fibers by the carbonization. The resultant graphene/carbon fiber aerogels （GCFAs） exhibit high electrical conductivities and enhanced compressive properties, which are highly efficient in improving both mechanical and electrical performances of epoxy composites. Compared to those of neat epoxy, the compressive modulus, compressive strength and energy absorption of the electrically conductive GCFA/epoxy composite are significantly increased by 60%, 59% and 131%, respectively.
