RESUMO
This paper corroborates three different hybrid modulation strategies suitable for single-phase voltage source inverter. The proposed method is formulated using fundamental switching and carrier based pulse width modulation methods. The main tale of this proposed method is to optimize a specific performance criterion, such as minimization of the total harmonic distortion (THD), lower order harmonics, switching losses, and heat losses. The proposed method is articulated using fundamental switching and carrier based pulse width modulation methods. Thus, the harmonic pollution in the power system will be reduced and the power quality will be augmented with better harmonic profile for a target fundamental output voltage. The proposed modulation strategies are simulated in MATLAB r2010a and implemented in a Xilinx spartan 3E-500 FG 320 FPGA processor. The feasibility of these modulation strategies is authenticated through simulation and experimental results.
RESUMO
The single dose anticoagulant rodenticide, bromadiolone (0.005%) and the acute rodenticide, zinc phosphide (2%) were evaluated in the paddy fields during Samba and Thaladi seasons for two crop stages, viz. 20 and 40 days after transplantation. Three baiting methods namely, burrow, station and burrow+station were adopted for both rodenticides. Both the rodenticides were exposed for one and two days in the partitioned plots. In the plots with 20 days after transplantation, the two day exposure of both rodenticides in burrow+station baitings during both seasons cleared cent percent rodent population. The cost-benefit ratio of the employed rodenticides favoured zinc phosphide than bromadiolone. Thus, zinc phosphide is deemed to be an economic rodenticide than bromadiolone and it can be suggested for the control of rodent population with two day exposure by burrow+station baiting methods preferably 20 days after transplanted paddy fields in both seasons.
