Under unbalanced supply condition low order harmonics will appear at the input and output terminals of the PWM AC to DC converter. Based on the positive and negative sequence components, an unbalanced transfer matrix in terms of the input phase voltages is derived. An on-line method using a neural network (NN) is used to implement this transfer matrix. It is shown that by using an additional lo...

Neural network based Chinese Word Segmentation (CWS) approaches can bypass the burdensome feature engineering comparing with the conventional ones. All previous neural network based approaches rely on a local window in character sequence labelling process. It can hardly exploit the outer context and may preserve indifferent inner context. Moreover, the size of local window is a toilsome manual-...

This paper investigates the performance of line commutated converter (LCC) based monopolar HVDC transmission system feeding a weak AC network with hybrid reactive power compensators (RPC’s) at the inverter AC side. The hybrid compensator is an equal mix of any two of the following compensators: synchronous compensator (SC); static var compensator (SVC); static synchronous compensator (STATCOM)....

Rail transport together represents energy systems of enormous proportions. An important step in maintaining the correct performance such a system is acquisition and preservation electrical parameters.
 The main operational problems appear at moment these parameters within acceptable limits. One are linear overhead lines that run along contact network AC railway. problem phase imbalance bot...

We develop and analyze a measure-valued fluid model keeping track of parking charging requirements electric vehicles in local distribution grid. show how this arises as an accumulation point appropriately scaled sequence stochastic network models. Our analysis incorporates load-flow models that describe the laws electricity. Specifically, we consider alternating current (AC) linearized Distflow...

This paper describes a multilevel Z-source inverter for solar photovoltaic applications. The conventional power conversion topology performs either buck or boost the input voltage for non linear load depending upon duty ratio and modulation index in a multiple stage conversion with the help of impedance source passive network (L and C), which is usually known as Z-Source, which couples the n le...

A high-quality low-temperature ac susceptometer is calibrated by comparing the measured ac susceptibility of a copper cylinder with its eddy-current ac susceptibility accurately calculated. Different from conventional calibration techniques that compare the measured results with the known property of a standard sample at certain fixed temperature T, field amplitude H(m), and frequency f, to get...

OBJECTIVE Although SPECT/CT systems have been used for sentinel lymph node (SLN) imaging, few studies have focused on optimization of attenuation correction (AC) and scatter correction (SC). While SLNs could be detected in conventional planar images, they sometimes do not appear in SPECT/CT images. The purpose of this study was to investigate the optimal AC and SC and to improve the detectabili...

Between 2014 and 2016 more than 3,800 imported human cases of chikungunya fever in Florida highlight the high risk for local transmission. To examine the potential for sustained local transmission of chikungunya virus (CHIKV) in Florida we tested whether local populations of Aedes aegypti and Aedes albopictus show differences in susceptibility to infection and transmission to two emergent linea...