This paper presents a novel fuzzy pulse skip modulation （FPSM） controller for switching direct current to direct current （DC-DC） converters based on fuzzy ratiocination modeling approach. Owing to the optimal cons...This paper presents a novel fuzzy pulse skip modulation （FPSM） controller for switching direct current to direct current （DC-DC） converters based on fuzzy ratiocination modeling approach. Owing to the optimal consideration during the design and the nonlinear characteristics of the controller, improved dynamic responses of the FPSM controller can be achieved over conventional controllers. Compared with conventional proportion integral derivative （PID） control, FPSM control has 60% lower overshoot and 10% lower setting time under the same input voltage and output load change. The presented approach is general and can be applied to other types of DC-DC converters.展开更多
S-wave resonances of positron–helium and positron–lithium systems in kappa-distribution plasmas are investigated using Hylleraas-type wave functions in the framework of the stabilization method. A model potential ap...S-wave resonances of positron–helium and positron–lithium systems in kappa-distribution plasmas are investigated using Hylleraas-type wave functions in the framework of the stabilization method. A model potential approach is used to represent the interactions between the outer electron, the positron and the core. The resonance parameters(position and width) of positron–helium and positron–lithium systems below the Ps(2s) threshold are reported as a function of screening parameter and spectral index of plasma.展开更多
基金This was work supported by the National Nature Science Foundation of China under Grant No. 60436030.
文摘This paper presents a novel fuzzy pulse skip modulation （FPSM） controller for switching direct current to direct current （DC-DC） converters based on fuzzy ratiocination modeling approach. Owing to the optimal consideration during the design and the nonlinear characteristics of the controller, improved dynamic responses of the FPSM controller can be achieved over conventional controllers. Compared with conventional proportion integral derivative （PID） control, FPSM control has 60% lower overshoot and 10% lower setting time under the same input voltage and output load change. The presented approach is general and can be applied to other types of DC-DC converters.
基金Project supported by the University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province,China(Grant No.UNPYSCT-2015019)the Fundamental Research Funds of Heilongjiang University,Heilongjiang Province,China(Grant No.HDJCCX-201625)+1 种基金the Natural Science Foundation for Distinguished Young Scholars in Heilongjiang University,China(Grant No.JCL201503)the Natural Science Foundation of Heilongjiang Province,China(Grant No.A2017008)
文摘S-wave resonances of positron–helium and positron–lithium systems in kappa-distribution plasmas are investigated using Hylleraas-type wave functions in the framework of the stabilization method. A model potential approach is used to represent the interactions between the outer electron, the positron and the core. The resonance parameters(position and width) of positron–helium and positron–lithium systems below the Ps(2s) threshold are reported as a function of screening parameter and spectral index of plasma.
