Adaptive hybrid intelligent MPPT controller to approximate effectual wind speed and optimal rotor speed of variable speed wind turbine

Operating wind power generation system at optimal power point is essential which is achieved by employing a Maximum Power Point Tracking (MPPT) control strategy. This literature focuses on developing a novel particle swarm optimization algorithm enhanced radial basis function neural network supported TSR based MPPT control strategy for Doubly Fed Induction Generator (DFIG) based wind power generation system. The proposed hybrid MPPT control strategy estimates the effective wind speed and estimates the optimal rotor speed of the wind power generation system to track the maximum power. The proposed controller extremely reduces the speed dissimilarity range of wind power generation system, which leads to rationalizing the pulse width inflection of DFIG rotor side converter. This in turn, increases the system’s reliability and delivers an effective power tracking with reduced converter losses. Furthermore, by utilizing the proposed MPPT controller, the converter size can be reduced to 40%. Therefore, the overall cost of the system can be gradually decreased. To validate the performance of the proposed MPPT controller, an extensive simulation study has been carried out under medium and high wind speed conditions in MATLAB/Simulink. The obtained results have been justified using experimental analysis

Correction: Physiochemical characterization and cytotoxicity evaluation of mercury-based formulation for the development of anticancer therapeuticals.

[This corrects the article DOI: 10.1371/journal.pone.0195800.]

Synthesis, growth and characterization of semiorganic nonlinear optical single crystal bis(thiourea) barium nitrate (BTBN) for frequency conversion

A novel semiorganic nonlinear optical (NLO) crystal, bis(thiourea) barium nitrate (BTBN) was synthesized and grown by slow evaporation method. Structure of the new crystalline compound was confirmed by single crystal X-ray diffraction analysis and it showed that BTBN belongs to orthorhombic crystal system. The crystalline nature of the BTBN was confirmed by powder X-ray diffraction study. Important functional groups of BTBN were identified by FT-IR spectroscopic analysis. UV-Vis-NIR spectral study showed that the grown crystal is transparent in the entire visible region with low cut off wavelength of 304 nm. BTBN exhibits a SHG efficiency which is nearly 2.38 times higher than that of KDP. The BTBN crystal has high mechanical strength and belongs to soft category, which was confirmed by micorhardness study. The thermal stability of BTBN was determined from TGA and DTA thermal study which revealed that the BTBN crystal has thermal stability up to 243.1 °C. The surface properties and presence of elements was analyzed by SEM and EDAX study, respectively

The Crystal Structure of 4-(2-Chlorobenzyl)-5-phenyl-1,2,4-triazole

The crystal structure of the title compound [CCDC No. 157498], C_1_5H_1_2N_3Cl, contains a 1,2,4-triazole moiety substituted with a phenyl ring and methyl chlorophenyl group as exogenous substituents. The triazole ring is planar within 0.004(3)Å. The dihedral angles between the phenyl rings and the 1,2,4-triazole ring are 88.1(1)° and 44.3(1)°. The interplanar angle between the two phenyl rings is 57.2(1)°. The packing of the molecules is stabilized by the intermolecular interactions

Trypan blue stained MCF-7 cells after treatment with control and higher concentration.

<p>Trypan blue stained MCF-7 cells after treatment with control and higher concentration.</p

Time course profile of cell viability for Hek293.

<p>Time course profile of cell viability for Hek293.</p