What is an integrated vector control?
Integrated vector management (IVM) is a rational decision-making process that encourages optimal use of resources for efficient, cost-effective and sustainable vector control.
What are the key elements of IVM?
Integrated vector management (IVM) is defined as “a rational decision-making process for the optimal use of resources for vector control” and includes five key elements: 1) evidence-based decision-making, 2) integrated approaches 3), collaboration within the health sector and with other sectors, 4) advocacy, social …
Why is vector control important?
Vector control is crucial to reduce the incidence of infection from diseases; this is especially important for those for which there is currently no effective cure or preventive medical measures available, such as Dengue, West Nile virus and Chikungunya virus.
What are the three components of vector management?
Mosquito-borne diseases are a continuous challenge to public health. To prevent transmission, Integrated Vector Management (IVM) applies preventive, control, and communicational strategies that should be feasible, environmentally benign, and sustainable.
What is the importance of vector control?
Vector control aims to limit the transmission of pathogens by reducing or eliminating human contact with the vector. A wide range of vector control tools exist, which can be broadly classified into chemical- and non–chemical-based tools (Table 2).
How many types of vector control methods are there?
Methods of vector control include the elimination or management of larval habitats, larviciding with insecticides, the use of biological agents and the application of adulticides.
What is VF pattern?
This control method uses what is called a V/f pattern. A V/f pattern defines a ratio of voltage to frequency for the motor to follow. At a given speed reference a corresponding voltage will be output to the motor.
What is vector control in VFD?
Vector control, also called field-oriented control (FOC), is a variable-frequency drive (VFD) control method in which the stator currents of a three-phase AC or brushless DC electric motor are identified as two orthogonal components that can be visualized with a vector.
What is the difference between DTC and FOC?
FOC uses linear controllers and pulse width modulation (PWM) to control the fundamental components of the load voltage. On the other hand, DTC is a nonlinear strategy that directly generates the voltage vectors in the absence of a modulator.
What is V F control method?
V/F is abbreviated from voltage/frequency. V/F control is an induction motor control method which ensures the output voltage proportional with the frequency, so it maintains a constant motor flux, preventing weak magnetic and magnetic saturation phenomenon from happening.
What is the difference between DTC and scalar mode?
It is concluded that speed response time of DTC is faster than Scalar Control Method also Stator current THD is lesser than Scalar Control Method. Torque ripple is also lower in DTC compared to Scalar Control Method.
What is DTC in VFD?
Direct torque control (DTC) is one method used in variable-frequency drives to control the torque (and thus finally the speed) of three-phase AC electric motors. This involves calculating an estimate of the motor’s magnetic flux and torque based on the measured voltage and current of the motor.