Many crystalline solids possess strongly anharmonic ``soft'' phonon modes characterized by diminishing frequency as temperature approaches a critical point associated with symmetry breaking phase transition. While electron--soft coupling can introduce unique scattering channels for charge carriers in ferroelectrics, recent studies on the nonferroelectric lead halide perovskites have also sugges...

In this paper, the efficiency-oriented design considerations are discussed based on the operation-mode analysis of the LLC converter considering the characteristics of charging profiles. The mode boundaries and distribution are obtained from the precise time-domain model. The operation modes featuring both-side soft-switching capability are identified to design the operating trace of the chargi...

2014 Intrinsic defects tend to oscillate relative to the domains in the two-phase region of the orientational transformation. When the solid is treated as a continuous elastic medium, the vibrational frequencies of vacancies and mobile dislocations are found to decrease as (To T)1/3 and | T0 T |1/2, respectively, near the transition point To. From the ultrasonic excitation of the soft mode of d...

This paper presents a novel single-phase high-powerfactor (HPF) pulsewidth-modulated (PWM) boost rectifier featuring soft commutation of the active switches at zero current (ZC). It incorporates the most desirable properties of conventional PWM and soft-switching resonant techniques. The input current shaping is achieved with average current mode control and continuous inductor current mode. Th...

A novel sample holder is introduced which allows for temperature dependent soft x-ray absorption spectroscopy of liquids in transmission mode. The setup is based on sample cells with x-ray transmissive silicon nitride windows. A cooling circuit allows for temperature regulation of the sample liquid between -10 °C and +50 °C. The setup enables to record soft x-ray absorption spectra of liquids i...

This paper introduces a new speech enhancement method using soft thresholding with a Discrete Cosine Transform (DCT) and Empirical Mode Decomposition (EMD) based hybrid algorithm. Soft thresholding for DCT-enhancement is a powerful method for enhancing the noisy speech signal in a wide range of signal-to-noise ratios (S Rs). However, due to the thresholding criteria a significant amount of nois...