文章以电池储能系统参与电力系统二次调频为研究对象,提出了一种基于小波变换的储能参与电网二次调频容量优化配置方法。区别于传统容量配置方法中储能系统和火电机组采用定比例功率分配方法,该容量配置方法采用小波变换对初始区域控制...文章以电池储能系统参与电力系统二次调频为研究对象,提出了一种基于小波变换的储能参与电网二次调频容量优化配置方法。区别于传统容量配置方法中储能系统和火电机组采用定比例功率分配方法,该容量配置方法采用小波变换对初始区域控制偏差(Area Control Error,ACE)信号进行分解重组和再分配,将高频信号分配给储能系统,将低频信号分配给火电机组;然后建立储能参与电网调频的成本-效益模型,分析不同重组点下的调频效果指标和净效益,得出最终的容量配置结果;最后,基于实测的ACE信号验证了配置结果的合理性和有效性。展开更多
(rTMS) on limb dysfunction in ischemic stroke patients. Methods: A total of 63 stroke patients were divided into an observation group and a control group using the random number table method. Thirty-one patients in th...(rTMS) on limb dysfunction in ischemic stroke patients. Methods: A total of 63 stroke patients were divided into an observation group and a control group using the random number table method. Thirty-one patients in the control group were treated with routine Western medicine combined with rTMS;32 patients in the observation group were treated with EA in addition to the intervention in the control group. The duration of treatment was 3 months. The National Institutes of Health stroke scale (NIHSS), the Fugl-Meyer assessment (FMA), the modified Barthel index (MBI), and the motor evoked potential (MEP) latency of transcranial magnetic stimulation were observed before and after treatment in both groups. Results: Two cases withdrew from the observation group and 1 case withdrew from the control group. After treatment, the NIHSS score in both groups was lower than that before treatment, the FMA and MBI scores were higher than those before treatment, and the latency period of MEP was shorter than that before treatment, and the differences were statistically significant (P<0.05). After treatment, the NIHSS, FMA, and MBI scores and MEP latency period of the observation group improved more than those of the control group, and the differences between the groups were statistically significant (P<0.05). Conclusion: EA combined with rTMS can improve the motor function of limbs in ischemic stroke patients and improve their self-care ability. The mechanism may be related to increasing the excitability of the motor cortex and improving the electrophysiological function of the central nervous system.展开更多
文摘文章以电池储能系统参与电力系统二次调频为研究对象,提出了一种基于小波变换的储能参与电网二次调频容量优化配置方法。区别于传统容量配置方法中储能系统和火电机组采用定比例功率分配方法,该容量配置方法采用小波变换对初始区域控制偏差(Area Control Error,ACE)信号进行分解重组和再分配,将高频信号分配给储能系统,将低频信号分配给火电机组;然后建立储能参与电网调频的成本-效益模型,分析不同重组点下的调频效果指标和净效益,得出最终的容量配置结果;最后,基于实测的ACE信号验证了配置结果的合理性和有效性。
文摘(rTMS) on limb dysfunction in ischemic stroke patients. Methods: A total of 63 stroke patients were divided into an observation group and a control group using the random number table method. Thirty-one patients in the control group were treated with routine Western medicine combined with rTMS;32 patients in the observation group were treated with EA in addition to the intervention in the control group. The duration of treatment was 3 months. The National Institutes of Health stroke scale (NIHSS), the Fugl-Meyer assessment (FMA), the modified Barthel index (MBI), and the motor evoked potential (MEP) latency of transcranial magnetic stimulation were observed before and after treatment in both groups. Results: Two cases withdrew from the observation group and 1 case withdrew from the control group. After treatment, the NIHSS score in both groups was lower than that before treatment, the FMA and MBI scores were higher than those before treatment, and the latency period of MEP was shorter than that before treatment, and the differences were statistically significant (P<0.05). After treatment, the NIHSS, FMA, and MBI scores and MEP latency period of the observation group improved more than those of the control group, and the differences between the groups were statistically significant (P<0.05). Conclusion: EA combined with rTMS can improve the motor function of limbs in ischemic stroke patients and improve their self-care ability. The mechanism may be related to increasing the excitability of the motor cortex and improving the electrophysiological function of the central nervous system.
