电力企业信息化发展迅速,各单位及部门信息管理系统间的资源不能有效共享,形成了信息孤岛。为了消除信息孤岛,针对地区供电系统提出了基于织女星信息网格(Vega Information Grid,VIG)构建配电虚拟数据中心的概念。在构建配电虚拟数据中...电力企业信息化发展迅速,各单位及部门信息管理系统间的资源不能有效共享,形成了信息孤岛。为了消除信息孤岛,针对地区供电系统提出了基于织女星信息网格(Vega Information Grid,VIG)构建配电虚拟数据中心的概念。在构建配电虚拟数据中心的过程中,系统研究了配电虚拟数据中心EVP三层资源组织模型,阐明了配电虚拟数据中心的构建方法并对方法的可行性进行了验证。试验结果表明,该配电虚拟数据中心的资源组织模型结构清晰、易用性强,可以大大提高上层应用软件的开发效率,取得了在供电企业应用VIG组织资源方面的初步成果。展开更多
The aim of the study was to assess the flow and inventory values of non-timber foret products （NTFPs）. The methods used for user surveys included literature research, community consultations, household visits and in...The aim of the study was to assess the flow and inventory values of non-timber foret products （NTFPs）. The methods used for user surveys included literature research, community consultations, household visits and interviews, household profiles and economic valuation models. Resource surveys incorporated a total often sampling plots （50 m × 50 m） under each landscape area in each study area and economic valuation of standing stock. The findings of the study re-affirm that NTFPs play a crucial role on the provision of subsistence and income to people＇s livelihoods, especially the poor and marginalized communities. Harvesting patterns of NTFPs normally vary within and between communities and villages adjacent to natural forests and woodlands. Increased and uncontrolled harvesting of NTFPs often leads to disappearance of numerous plant species and ultimately forest degradation. The key factors determining the variability in harvested quantities and values per household are： the wealth status, variability of species per site, season and duration of harvesting, commercialization, number of accessible natural woodlands within a site, need and demand, the household profile with regard to gender and age, and farm gate price differences. The study ultimately recommended that government, private sector, NGOs, communities, individuals, all interested and affected parties work together towards matching resource use with resource availability in order to promote sustainable resource use.展开更多
Both governmental and non-governmental organizations are engaged in the promotion of soil and water conservation practices in Northern Ghana, but adoption is believed to be low. This study thus examines the determinan...Both governmental and non-governmental organizations are engaged in the promotion of soil and water conservation practices in Northern Ghana, but adoption is believed to be low. This study thus examines the determinants of conservation practices adoption by farming households in the area. Data for the study were collected from 445 households located in 15 communities in Northern Ghana. Univariate, bivariate and multivariate probit models were used to analyse the decision to adopt six conservation practices in the area. Results show that the major determinants of adoption are plot and cropping characteristics such as location; and socio-economic and institutional variables such as number of contacts with extension officers, membership in farmer association and distance to major market. A policy implication of the study is the strengthening of extension service in the area to significantly boost conservation adootion.展开更多
文摘电力企业信息化发展迅速,各单位及部门信息管理系统间的资源不能有效共享,形成了信息孤岛。为了消除信息孤岛,针对地区供电系统提出了基于织女星信息网格(Vega Information Grid,VIG)构建配电虚拟数据中心的概念。在构建配电虚拟数据中心的过程中,系统研究了配电虚拟数据中心EVP三层资源组织模型,阐明了配电虚拟数据中心的构建方法并对方法的可行性进行了验证。试验结果表明,该配电虚拟数据中心的资源组织模型结构清晰、易用性强,可以大大提高上层应用软件的开发效率,取得了在供电企业应用VIG组织资源方面的初步成果。
文摘The aim of the study was to assess the flow and inventory values of non-timber foret products （NTFPs）. The methods used for user surveys included literature research, community consultations, household visits and interviews, household profiles and economic valuation models. Resource surveys incorporated a total often sampling plots （50 m × 50 m） under each landscape area in each study area and economic valuation of standing stock. The findings of the study re-affirm that NTFPs play a crucial role on the provision of subsistence and income to people＇s livelihoods, especially the poor and marginalized communities. Harvesting patterns of NTFPs normally vary within and between communities and villages adjacent to natural forests and woodlands. Increased and uncontrolled harvesting of NTFPs often leads to disappearance of numerous plant species and ultimately forest degradation. The key factors determining the variability in harvested quantities and values per household are： the wealth status, variability of species per site, season and duration of harvesting, commercialization, number of accessible natural woodlands within a site, need and demand, the household profile with regard to gender and age, and farm gate price differences. The study ultimately recommended that government, private sector, NGOs, communities, individuals, all interested and affected parties work together towards matching resource use with resource availability in order to promote sustainable resource use.
文摘Both governmental and non-governmental organizations are engaged in the promotion of soil and water conservation practices in Northern Ghana, but adoption is believed to be low. This study thus examines the determinants of conservation practices adoption by farming households in the area. Data for the study were collected from 445 households located in 15 communities in Northern Ghana. Univariate, bivariate and multivariate probit models were used to analyse the decision to adopt six conservation practices in the area. Results show that the major determinants of adoption are plot and cropping characteristics such as location; and socio-economic and institutional variables such as number of contacts with extension officers, membership in farmer association and distance to major market. A policy implication of the study is the strengthening of extension service in the area to significantly boost conservation adootion.
