During the Twelfth Five-Year plan,large-scale construction of smart grid with safe and stable operation requires a timely and accurate short-term load forecasting method.Moreover,along with the full-scale smart grid c...During the Twelfth Five-Year plan,large-scale construction of smart grid with safe and stable operation requires a timely and accurate short-term load forecasting method.Moreover,along with the full-scale smart grid construction,the power supply mode and consumption mode of the whole system can be optimized through the accurate short-term load forecasting;and the security,stability and cleanness of the system can be guaranteed.展开更多
The predictive model of surface roughness of the spiral bevel gear (SBG) tooth based on the least square support vector machine (LSSVM) was proposed.A nonlinear LSSVM model with radial basis function (RBF) kernel was ...The predictive model of surface roughness of the spiral bevel gear (SBG) tooth based on the least square support vector machine (LSSVM) was proposed.A nonlinear LSSVM model with radial basis function (RBF) kernel was presented and then the experimental setup of PECF system was established.The Taguchi method was introduced to assess the effect of finishing parameters on the gear tooth surface roughness,and the training data was also obtained through experiments.The comparison between the predicted values and the experimental values under the same conditions was carried out.The results show that the predicted values are found to be approximately consistent with the experimental values.The mean absolute percent error (MAPE) is 2.43% for the surface roughness and 2.61% for the applied voltage.展开更多
为了提高电力负荷预测的精度,应对单机运算资源不足的挑战,提出一种改进并行化粒子群算法优化的最小二乘支持向量机短期负荷预测模型。通过引入Spark on YARN内存计算平台,将改进并行粒子群优化(IPPSO)算法部署在平台上,对最小二乘支持...为了提高电力负荷预测的精度,应对单机运算资源不足的挑战,提出一种改进并行化粒子群算法优化的最小二乘支持向量机短期负荷预测模型。通过引入Spark on YARN内存计算平台,将改进并行粒子群优化(IPPSO)算法部署在平台上,对最小二乘支持向量机(LSSVM)的不确定参数进行算法优化,利用优化后的参数进行负荷预测。通过引入并行化和分布式的思想,提高算法预测准确率和处理海量高维数据的能力。采用EUNITE提供的真实负荷数据,在8节点的云计算集群上进行实验和分析,结果表明所提分布式电力负荷预测算法精度优于传统的泛化神经网络算法,在执行效率上优于基于Map Reduce的分布式在线序列优化学习机算法,且提出的算法具有较好的并行能力。展开更多
文摘During the Twelfth Five-Year plan,large-scale construction of smart grid with safe and stable operation requires a timely and accurate short-term load forecasting method.Moreover,along with the full-scale smart grid construction,the power supply mode and consumption mode of the whole system can be optimized through the accurate short-term load forecasting;and the security,stability and cleanness of the system can be guaranteed.
基金Project(90923022) supported by the National Natural Science Foundation of ChinaProject(2009220022) supported by Liaoning Science and Technology Foundation,China
文摘The predictive model of surface roughness of the spiral bevel gear (SBG) tooth based on the least square support vector machine (LSSVM) was proposed.A nonlinear LSSVM model with radial basis function (RBF) kernel was presented and then the experimental setup of PECF system was established.The Taguchi method was introduced to assess the effect of finishing parameters on the gear tooth surface roughness,and the training data was also obtained through experiments.The comparison between the predicted values and the experimental values under the same conditions was carried out.The results show that the predicted values are found to be approximately consistent with the experimental values.The mean absolute percent error (MAPE) is 2.43% for the surface roughness and 2.61% for the applied voltage.
文摘为了提高电力负荷预测的精度,应对单机运算资源不足的挑战,提出一种改进并行化粒子群算法优化的最小二乘支持向量机短期负荷预测模型。通过引入Spark on YARN内存计算平台,将改进并行粒子群优化(IPPSO)算法部署在平台上,对最小二乘支持向量机(LSSVM)的不确定参数进行算法优化,利用优化后的参数进行负荷预测。通过引入并行化和分布式的思想,提高算法预测准确率和处理海量高维数据的能力。采用EUNITE提供的真实负荷数据,在8节点的云计算集群上进行实验和分析,结果表明所提分布式电力负荷预测算法精度优于传统的泛化神经网络算法,在执行效率上优于基于Map Reduce的分布式在线序列优化学习机算法,且提出的算法具有较好的并行能力。
