随着智能电网发展,电力线通信(power line communication,PLC)面临业务数据量激增与传输速率提升的挑战,高精度信道估计成为提升通信性能的关键。传统压缩感知方法依赖离散化字典,存在基不匹配问题,限制多径时延分辨率。针对电力线信道...随着智能电网发展,电力线通信(power line communication,PLC)面临业务数据量激增与传输速率提升的挑战,高精度信道估计成为提升通信性能的关键。传统压缩感知方法依赖离散化字典,存在基不匹配问题,限制多径时延分辨率。针对电力线信道多径效应显著的特征,提出一种连续域稀疏恢复信道估计框架。该框架利用正交频分复用(orthogonal frequency division multiplexing,OFDM)系统子载波频率的等差特性,将多径时延映射为范德蒙德矩阵结构的频域响应,实现稀疏表示;采用原子范数最小化(atomic norm minimization,ANM)算法在连续参数空间求解,避免离散网格误差,显著提高时延分辨率;结合电力线信道指数衰减规律,通过频域衰减因子解析推导多径权重,完成信道响应闭式重构。仿真表明,该方法时延分辨率达到超分辨性能,较正交匹配追踪(orthogonal matching pursuit,OMP)等算法优势显著。展开更多
Objective: to analyze the clinical effect of Anming acupuncture combined with Sanyinjiao warm acupuncture on insomnia of phlegm-dampness zhongzu. Methods: The subjects of this study were patients with insomnia of phle...Objective: to analyze the clinical effect of Anming acupuncture combined with Sanyinjiao warm acupuncture on insomnia of phlegm-dampness zhongzu. Methods: The subjects of this study were patients with insomnia of phlegm-dampness zhongzu who were treated in our hospital. 36 patients were enrolled from March 2019 to November the following year. The patients were randomly divided into study group and control group, with 18 cases in each group. The control group was treated with acupuncture at Anming, and the research group was treated with Sanyinjiao warm acupuncture on this basis. The Pittsburgh Sleep Quality Index (PSQI) score, usage of ancillary drugs, and the incidence of insomnia symptoms were compared between the two groups. Results: The PSQI scores in both groups were lower than before treatment, but the score in the study group was lower than that in the control group (P < 0.05). The usage of ancillary drugs and the incidence of insomnia symptoms in the study group were lower than those in the control group (P < 0.05). Conclusion: Anming acupuncture combined with Sanyinjiao warm acupuncture can effectively reduce usage of ancillary drugs in the treatment of insomnia of phlegm-dampness zhongzu, help patients reduce insomnia symptoms, and improve patients' sleep quality.展开更多
文摘随着智能电网发展,电力线通信(power line communication,PLC)面临业务数据量激增与传输速率提升的挑战,高精度信道估计成为提升通信性能的关键。传统压缩感知方法依赖离散化字典,存在基不匹配问题,限制多径时延分辨率。针对电力线信道多径效应显著的特征,提出一种连续域稀疏恢复信道估计框架。该框架利用正交频分复用(orthogonal frequency division multiplexing,OFDM)系统子载波频率的等差特性,将多径时延映射为范德蒙德矩阵结构的频域响应,实现稀疏表示;采用原子范数最小化(atomic norm minimization,ANM)算法在连续参数空间求解,避免离散网格误差,显著提高时延分辨率;结合电力线信道指数衰减规律,通过频域衰减因子解析推导多径权重,完成信道响应闭式重构。仿真表明,该方法时延分辨率达到超分辨性能,较正交匹配追踪(orthogonal matching pursuit,OMP)等算法优势显著。
文摘Objective: to analyze the clinical effect of Anming acupuncture combined with Sanyinjiao warm acupuncture on insomnia of phlegm-dampness zhongzu. Methods: The subjects of this study were patients with insomnia of phlegm-dampness zhongzu who were treated in our hospital. 36 patients were enrolled from March 2019 to November the following year. The patients were randomly divided into study group and control group, with 18 cases in each group. The control group was treated with acupuncture at Anming, and the research group was treated with Sanyinjiao warm acupuncture on this basis. The Pittsburgh Sleep Quality Index (PSQI) score, usage of ancillary drugs, and the incidence of insomnia symptoms were compared between the two groups. Results: The PSQI scores in both groups were lower than before treatment, but the score in the study group was lower than that in the control group (P < 0.05). The usage of ancillary drugs and the incidence of insomnia symptoms in the study group were lower than those in the control group (P < 0.05). Conclusion: Anming acupuncture combined with Sanyinjiao warm acupuncture can effectively reduce usage of ancillary drugs in the treatment of insomnia of phlegm-dampness zhongzu, help patients reduce insomnia symptoms, and improve patients' sleep quality.
