通过建立产品销售预测模型,为服装品牌企业的产品管理提供决策依据.对现有预测工具进行比较分析后,选择SQL Server 2008软件的解决方案,运用时序算法,构建ART(自动回归树)模型.以案例品牌历史销售数据为基础,通过所构建的模型得到销售...通过建立产品销售预测模型,为服装品牌企业的产品管理提供决策依据.对现有预测工具进行比较分析后,选择SQL Server 2008软件的解决方案,运用时序算法,构建ART(自动回归树)模型.以案例品牌历史销售数据为基础,通过所构建的模型得到销售预测回归公式.通过模型验证了预测数据与实际数据的误差在可接受范围内,证明所构建销售预测模型的可行性.同时,基于所构建的模型建立案例品牌销售预测流程并提出产品管理策略.展开更多
The fluctuation of active power output of wind farm has many negative impacts on large-scale wind power integration into power grid. In this paper, flywheel energy storage system (FESS) was connected to AC side of the...The fluctuation of active power output of wind farm has many negative impacts on large-scale wind power integration into power grid. In this paper, flywheel energy storage system (FESS) was connected to AC side of the doubly-fed induction generator (DFIG) wind farm to realize smooth control of wind power output. Based on improved wind power prediction algorithm and wind speed-power curve modeling, a new smooth control strategy with the FESS was proposed. The requirement of power system dispatch for wind power prediction and flywheel rotor speed limit were taken into consideration during the process. While smoothing the wind power fluctuation, FESS can track short-term planned output of wind farm. It was demonstrated by quantitative analysis of simulation results that the proposed control strategy can smooth the active power fluctuation of wind farm effectively and thereby improve power quality of the power grid.展开更多
文摘通过建立产品销售预测模型,为服装品牌企业的产品管理提供决策依据.对现有预测工具进行比较分析后,选择SQL Server 2008软件的解决方案,运用时序算法,构建ART(自动回归树)模型.以案例品牌历史销售数据为基础,通过所构建的模型得到销售预测回归公式.通过模型验证了预测数据与实际数据的误差在可接受范围内,证明所构建销售预测模型的可行性.同时,基于所构建的模型建立案例品牌销售预测流程并提出产品管理策略.
文摘The fluctuation of active power output of wind farm has many negative impacts on large-scale wind power integration into power grid. In this paper, flywheel energy storage system (FESS) was connected to AC side of the doubly-fed induction generator (DFIG) wind farm to realize smooth control of wind power output. Based on improved wind power prediction algorithm and wind speed-power curve modeling, a new smooth control strategy with the FESS was proposed. The requirement of power system dispatch for wind power prediction and flywheel rotor speed limit were taken into consideration during the process. While smoothing the wind power fluctuation, FESS can track short-term planned output of wind farm. It was demonstrated by quantitative analysis of simulation results that the proposed control strategy can smooth the active power fluctuation of wind farm effectively and thereby improve power quality of the power grid.
