This paper′s aim is to study the numerical method of Fourier eigen transform. The characteristics of eigen bases, the Hermite function are analyzed. And a valuable result of eigen coefficients a n by mean...This paper′s aim is to study the numerical method of Fourier eigen transform. The characteristics of eigen bases, the Hermite function are analyzed. And a valuable result of eigen coefficients a n by means of Gauss Hermite integral is gotten. Through talking about amplitude frequency peculiarities of basic signals, we prove that the method applied in this paper possesses higher precision and smaller computation quantity. Finally, we conducted quasi real time FET analysis in seismicity, tentatively probed into the feasibility of FET in seismic prediction, obtained something of practical value.展开更多
基于静止同步串联补偿器(static synchronous series compensator,SSSC)建立了可用输电能力计算的最优潮流模型,并在模型中引入了SSSC的功率注入模型进行优化,采用原-对偶内点法对优化后的模型进行求解,根据特征结构分析法确定SSSC的最...基于静止同步串联补偿器(static synchronous series compensator,SSSC)建立了可用输电能力计算的最优潮流模型,并在模型中引入了SSSC的功率注入模型进行优化,采用原-对偶内点法对优化后的模型进行求解,根据特征结构分析法确定SSSC的最佳安装位置。利用IEEE30节点系统进行仿真分析,结果验证了该方法的有效性,说明在电力系统的薄弱线路上配置SSSC,可以有效地提高系统的可用输电能力。展开更多
Many years ago Bohr characterized the fundamental differences between the two extreme cases of quantum mechanical many-body problems known at that time: between the compound states in nuclei at extremely high level de...Many years ago Bohr characterized the fundamental differences between the two extreme cases of quantum mechanical many-body problems known at that time: between the compound states in nuclei at extremely high level density and the shell-model states in atoms at low level density. It is shown in the present paper that the compound nucleus states at high level density are the result of a dynamical phase transition due to which they have lost any spectroscopic relation to the individual states of the nucleus. The last ones are shell-model states which are of the same type as the shell-model states in atoms. Mathematically, dynamical phase transitions are caused by singular (exceptional) points at which the trajectories of the eigenvalues of the non-Hermitian Hamilton operator cross. In the neighborhood of these singular points, the phases of the eigenfunctions are not rigid. It is possible therefore that some eigenfunctions of the system align to the scattering wavefunctions of the environment by decoupling (trapping) the remaining ones from the environment. In the Schr?dinger equation, nonlinear terms appear in the neighborhood of the singular points.展开更多
文摘This paper′s aim is to study the numerical method of Fourier eigen transform. The characteristics of eigen bases, the Hermite function are analyzed. And a valuable result of eigen coefficients a n by means of Gauss Hermite integral is gotten. Through talking about amplitude frequency peculiarities of basic signals, we prove that the method applied in this paper possesses higher precision and smaller computation quantity. Finally, we conducted quasi real time FET analysis in seismicity, tentatively probed into the feasibility of FET in seismic prediction, obtained something of practical value.
文摘基于静止同步串联补偿器(static synchronous series compensator,SSSC)建立了可用输电能力计算的最优潮流模型,并在模型中引入了SSSC的功率注入模型进行优化,采用原-对偶内点法对优化后的模型进行求解,根据特征结构分析法确定SSSC的最佳安装位置。利用IEEE30节点系统进行仿真分析,结果验证了该方法的有效性,说明在电力系统的薄弱线路上配置SSSC,可以有效地提高系统的可用输电能力。
文摘Many years ago Bohr characterized the fundamental differences between the two extreme cases of quantum mechanical many-body problems known at that time: between the compound states in nuclei at extremely high level density and the shell-model states in atoms at low level density. It is shown in the present paper that the compound nucleus states at high level density are the result of a dynamical phase transition due to which they have lost any spectroscopic relation to the individual states of the nucleus. The last ones are shell-model states which are of the same type as the shell-model states in atoms. Mathematically, dynamical phase transitions are caused by singular (exceptional) points at which the trajectories of the eigenvalues of the non-Hermitian Hamilton operator cross. In the neighborhood of these singular points, the phases of the eigenfunctions are not rigid. It is possible therefore that some eigenfunctions of the system align to the scattering wavefunctions of the environment by decoupling (trapping) the remaining ones from the environment. In the Schr?dinger equation, nonlinear terms appear in the neighborhood of the singular points.
