Based on the special theory of relativity in space-like continuum, the pre-sent author points that if there exist tachyons in nature, they should be neutral point-like particles with lepton appearance, which are very ...Based on the special theory of relativity in space-like continuum, the pre-sent author points that if there exist tachyons in nature, they should be neutral point-like particles with lepton appearance, which are very much like our early understanding about neutrinos before. The author also points that an alternative explanation for neutrino oscillations may be the conversion between mass-less neutrinos with different flavors expressed in different “lowest limited momentum” during their flight journey, which originates from that the argument in the squared sine function of the probability of neutrino oscillation may be less than zero, which is mathematical foresight and may not be ignored.展开更多
大规模弃风现象会造成大量限电异常值,限电异常值会严重影响并网电力系统的稳定性。采用四分位法和灰狼优化箱线图算法(grey wolf optimized boxplot algorithm,GWO-Boxplot)对风电场中各风电机组限电和离散等异常值进行自适应识别与精...大规模弃风现象会造成大量限电异常值,限电异常值会严重影响并网电力系统的稳定性。采用四分位法和灰狼优化箱线图算法(grey wolf optimized boxplot algorithm,GWO-Boxplot)对风电场中各风电机组限电和离散等异常值进行自适应识别与精细划分。针对风电机组输出功率在时空上存在一定相关性,提出了一种融合时空相关性和权重系数分配的风电机组异常值处理方法,对历史功率填补数据和空间相关填补数据进行权重系数分配并加权求和,最后通过分形插值算法对曲线进行拟合。利用某座集群风电场中各风电机组实际出力数据对所提方法进行验证,仿真结果表明所提方法对异常值剔除率及拟合精度有明显提升效果。展开更多
The problem of reconstructing a signalφ（x） from its magnitude ｜φ（x）] isof considerable interest to engineers and physicists. This article concerns the problem of determining a time-limited signal f with period ...The problem of reconstructing a signalφ（x） from its magnitude ｜φ（x）] isof considerable interest to engineers and physicists. This article concerns the problem of determining a time-limited signal f with period 2π when ｜f（eix）l is known for x∈[-π,π]. It is shown that the conditions ｜g（eix）｜ = ｜f（eix）｜ and ｜g（ci（x＋b）） -g（eix）｜ =f（ei（x＋b）） - f（eix）｜, b ≠ 27π, together imply that either g = wf or g = v f, where both w and v have period b. Furthermore, if b/2π is irrational then the functions w and v b is rational then w takes the form reduce to some constants c1 and c2, respectively; ifb/2π is rational then w takes the form w=elexB1（e1x）B2（elx）and v takes the form ei（x2πN/b＋a）B1（elx）B2（elx）,where B1 and B2 are Blaschke products.展开更多
文摘Based on the special theory of relativity in space-like continuum, the pre-sent author points that if there exist tachyons in nature, they should be neutral point-like particles with lepton appearance, which are very much like our early understanding about neutrinos before. The author also points that an alternative explanation for neutrino oscillations may be the conversion between mass-less neutrinos with different flavors expressed in different “lowest limited momentum” during their flight journey, which originates from that the argument in the squared sine function of the probability of neutrino oscillation may be less than zero, which is mathematical foresight and may not be ignored.
文摘大规模弃风现象会造成大量限电异常值,限电异常值会严重影响并网电力系统的稳定性。采用四分位法和灰狼优化箱线图算法(grey wolf optimized boxplot algorithm,GWO-Boxplot)对风电场中各风电机组限电和离散等异常值进行自适应识别与精细划分。针对风电机组输出功率在时空上存在一定相关性,提出了一种融合时空相关性和权重系数分配的风电机组异常值处理方法,对历史功率填补数据和空间相关填补数据进行权重系数分配并加权求和,最后通过分形插值算法对曲线进行拟合。利用某座集群风电场中各风电机组实际出力数据对所提方法进行验证,仿真结果表明所提方法对异常值剔除率及拟合精度有明显提升效果。
基金Supported by Foundation of Hubei Educational Committee (Q20091004)NSFC (10771053)+1 种基金the National Research Foundation for the Doctoral Program of Higher Education of China (SRFDP) (20060512001)Natural Science 373 Foundation of Hubei Province (2007ABA139)
文摘The problem of reconstructing a signalφ（x） from its magnitude ｜φ（x）] isof considerable interest to engineers and physicists. This article concerns the problem of determining a time-limited signal f with period 2π when ｜f（eix）l is known for x∈[-π,π]. It is shown that the conditions ｜g（eix）｜ = ｜f（eix）｜ and ｜g（ci（x＋b）） -g（eix）｜ =f（ei（x＋b）） - f（eix）｜, b ≠ 27π, together imply that either g = wf or g = v f, where both w and v have period b. Furthermore, if b/2π is irrational then the functions w and v b is rational then w takes the form reduce to some constants c1 and c2, respectively; ifb/2π is rational then w takes the form w=elexB1（e1x）B2（elx）and v takes the form ei（x2πN/b＋a）B1（elx）B2（elx）,where B1 and B2 are Blaschke products.
