This paper has analyzed the dynamics mechanism of resource enterprises community vulnerability,selected the key factor of resources to establish a nonlinear dynamical model.The model reveals the constrained relationsh...This paper has analyzed the dynamics mechanism of resource enterprises community vulnerability,selected the key factor of resources to establish a nonlinear dynamical model.The model reveals the constrained relationship between the number of vulnerable enterprises and resource shortage rate,and the same relationship between t vulnerable enterprise numbers and the owning rate of resource market by the biggest enterprise in resource-type enterprises community of China.The results showed that,the shortage rate of resources take up more percentage than the occupancy of resource rate of the strongest enterprises in Enterprise community when D>q.the characteristics and patterns of the Chinese enterprise evolution are as follows,(1)The strongest enterprises n1 will decline or transform in the enterprise community.(2)The enterprises which survived after the shortage of resources will go through three stages:①resistance stage;②recovery stage;③stable stage.We believe that there are three movements that can make sure the resource-based enterprises community keep growing continuously in the competitive market for resources,(1)understand the enterprise resources shortage rate and the strongest enterprises share in resource rate in enterprise community,(2)follow the even-odd symmetry or odd-even symmetry laws based on the familiarity of a resource economy,(3)put the enterprises in the suitable position.展开更多
This research aims to study an online distribution of community enterprise products,to design the management system for an e-commerce distribution channel,and to compare the efficiency of distribution channels through...This research aims to study an online distribution of community enterprise products,to design the management system for an e-commerce distribution channel,and to compare the efficiency of distribution channels through a developed e-commerce system and ready web.A personal interview survey method was used to collect data on the production,marketing,and online selling issues.In total 150 community enterprise entrepreneurs in five product categories(food,appliance/home decoration,beverage,garment/ornament and non-food herb)and 50 consumers were equally selected by judgment sampling method.The e-commerce channel that was developed is our website and social network website that was selected to compare the efficiency of distribution channels is Facebook.The research found that only 14.67%of community enterprise entrepreneurs sell products through online channel.The product which was sold through the developed website and maximized gross profit is food(35.53%of total revenue).The others,are beverage,non-food herb,appliance/home decoration,and garment/ornament,earn gross profit 31.50%,22.39%,9.78%and 0.80%of total revenue,respectively.The result of distribution channels comparison between our website and webpages on Facebook found that Facebook has the ability to reach customers 2,811 times more than the website 64.75%,which has only 991 times.Regarding to sales,it is found that revenue from Facebook is higher than the website in all product categories.展开更多
Creative enterprises can bring new opportunities to the development of the industry and are new engines for promoting regional development. Creative enterprises play an active role in promoting regional economic devel...Creative enterprises can bring new opportunities to the development of the industry and are new engines for promoting regional development. Creative enterprises play an active role in promoting regional economic development, solving employment problems, strengthening cultural education, and improving the ecological environment. But at the same time, there are still many problems in the process of developing creative enterprises. For example, who are the real beneficiary, and what price are paid when developing creative enterprises. What are these problems and how to avoid them are the main content of this article.展开更多
As an important product of Moderate Resolution Imaging Spectroradiometer(MODIS), MOD17A2 provides dramatic improvements in our ability to accurately and continuously monitor global terrestrial primary production, whic...As an important product of Moderate Resolution Imaging Spectroradiometer(MODIS), MOD17A2 provides dramatic improvements in our ability to accurately and continuously monitor global terrestrial primary production, which is also significant in effort to advance scientific research and eco-environmental management. Over the past decades, forests have moderated climate change by sequestrating about one-quarter of the carbon emitted by human activities through fossil fuels burning and land use/land cover change. Thus, the carbon uptake by forests reduces the rate at which carbon accumulates in the atmosphere. However, the sensitivity of near real-time MODIS gross primary productivity(GPP) product is directly constrained by uncertainties in the modeling process, especially in complicated forest ecosystems. Although there have been plenty of studies to verify MODIS GPP with ground-based measurements using the eddy covariance(EC) technique, few have comprehensively validated the performance of MODIS estimates(Collection 5) across diverse forest types. Therefore, the present study examined the degree of correspondence between MODIS-derived GPP and EC-measured GPP at seasonal and interannual time scales for the main forest ecosystems, including evergreen broadleaf forest(EBF), evergreen needleleaf forest(ENF), deciduous broadleaf forest(DBF), and mixed forest(MF) relying on 16 flux towers with a total of 68 site-year datasets. Overall, site-specific evaluation of multi-year mean annual GPP estimates indicates that the current MOD17A2 product works highly effectively for MF and DBF, moderately effectively for ENF, and ineffectively for EBF. Except for tropical forest, MODIS estimates could capture the broad trends of GPP at 8-day time scale for all other sites surveyed. On the annual time scale, the best performance was observed in MF, followed by ENF, DBF, and EBF. Trend analyses also revealed the poor performance of MODIS GPP product in EBF and DBF. Thus, improvements in the sensitivity of MOD17A2 to forest productivity require continued efforts.展开更多
基金This work was supported by Jiangxi University Humanities and Social Sciences Research Project of China[No.JC18118]the Humanity and Social Sciences Foundation of Ministry of Education of China(17YJAZH113)+1 种基金Hainan Provincial Natural Science Foundation of China[Grant No.417151]the Doctoral Scientific Research Foundation of Hainan Tropical Ocean University[Grant No.RHDXB201613].
文摘This paper has analyzed the dynamics mechanism of resource enterprises community vulnerability,selected the key factor of resources to establish a nonlinear dynamical model.The model reveals the constrained relationship between the number of vulnerable enterprises and resource shortage rate,and the same relationship between t vulnerable enterprise numbers and the owning rate of resource market by the biggest enterprise in resource-type enterprises community of China.The results showed that,the shortage rate of resources take up more percentage than the occupancy of resource rate of the strongest enterprises in Enterprise community when D>q.the characteristics and patterns of the Chinese enterprise evolution are as follows,(1)The strongest enterprises n1 will decline or transform in the enterprise community.(2)The enterprises which survived after the shortage of resources will go through three stages:①resistance stage;②recovery stage;③stable stage.We believe that there are three movements that can make sure the resource-based enterprises community keep growing continuously in the competitive market for resources,(1)understand the enterprise resources shortage rate and the strongest enterprises share in resource rate in enterprise community,(2)follow the even-odd symmetry or odd-even symmetry laws based on the familiarity of a resource economy,(3)put the enterprises in the suitable position.
文摘This research aims to study an online distribution of community enterprise products,to design the management system for an e-commerce distribution channel,and to compare the efficiency of distribution channels through a developed e-commerce system and ready web.A personal interview survey method was used to collect data on the production,marketing,and online selling issues.In total 150 community enterprise entrepreneurs in five product categories(food,appliance/home decoration,beverage,garment/ornament and non-food herb)and 50 consumers were equally selected by judgment sampling method.The e-commerce channel that was developed is our website and social network website that was selected to compare the efficiency of distribution channels is Facebook.The research found that only 14.67%of community enterprise entrepreneurs sell products through online channel.The product which was sold through the developed website and maximized gross profit is food(35.53%of total revenue).The others,are beverage,non-food herb,appliance/home decoration,and garment/ornament,earn gross profit 31.50%,22.39%,9.78%and 0.80%of total revenue,respectively.The result of distribution channels comparison between our website and webpages on Facebook found that Facebook has the ability to reach customers 2,811 times more than the website 64.75%,which has only 991 times.Regarding to sales,it is found that revenue from Facebook is higher than the website in all product categories.
文摘Creative enterprises can bring new opportunities to the development of the industry and are new engines for promoting regional development. Creative enterprises play an active role in promoting regional economic development, solving employment problems, strengthening cultural education, and improving the ecological environment. But at the same time, there are still many problems in the process of developing creative enterprises. For example, who are the real beneficiary, and what price are paid when developing creative enterprises. What are these problems and how to avoid them are the main content of this article.
基金Under the auspices of National Natural Science Foundation of China(No.41401221,41271500,41201496)Opening Fund of Key Laboratory of Poyang Lake Wetland and Watershed Research(Jiangxi Normal University),Ministry of Education,China(No.PK2014002)
文摘As an important product of Moderate Resolution Imaging Spectroradiometer(MODIS), MOD17A2 provides dramatic improvements in our ability to accurately and continuously monitor global terrestrial primary production, which is also significant in effort to advance scientific research and eco-environmental management. Over the past decades, forests have moderated climate change by sequestrating about one-quarter of the carbon emitted by human activities through fossil fuels burning and land use/land cover change. Thus, the carbon uptake by forests reduces the rate at which carbon accumulates in the atmosphere. However, the sensitivity of near real-time MODIS gross primary productivity(GPP) product is directly constrained by uncertainties in the modeling process, especially in complicated forest ecosystems. Although there have been plenty of studies to verify MODIS GPP with ground-based measurements using the eddy covariance(EC) technique, few have comprehensively validated the performance of MODIS estimates(Collection 5) across diverse forest types. Therefore, the present study examined the degree of correspondence between MODIS-derived GPP and EC-measured GPP at seasonal and interannual time scales for the main forest ecosystems, including evergreen broadleaf forest(EBF), evergreen needleleaf forest(ENF), deciduous broadleaf forest(DBF), and mixed forest(MF) relying on 16 flux towers with a total of 68 site-year datasets. Overall, site-specific evaluation of multi-year mean annual GPP estimates indicates that the current MOD17A2 product works highly effectively for MF and DBF, moderately effectively for ENF, and ineffectively for EBF. Except for tropical forest, MODIS estimates could capture the broad trends of GPP at 8-day time scale for all other sites surveyed. On the annual time scale, the best performance was observed in MF, followed by ENF, DBF, and EBF. Trend analyses also revealed the poor performance of MODIS GPP product in EBF and DBF. Thus, improvements in the sensitivity of MOD17A2 to forest productivity require continued efforts.
