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Power circuit is a voltage-mode controlled single-phase half-bridge inverter. This work investigates nonlinear dynamic behaviors with a valid and novel approach. Firstly, the operational principle of a single-phase half-bridge inverter is examined and mapping state-space equations are generated. Additionally, the SIMULINK tool for mathematical simulation and IsSpice for approximately physical simulation...
Implantable medical devices (IMDs) have played an important role in many medical fields. Any failure in IMDs operations could cause serious consequences and it is important to protect the IMDs access from unauthenticated access. This study investigates secure IMD data collection within a telehealthcare [mobile health (m-health)] network. We use medical sensors carried by patients to securely access...
This study investigates the instability phenomena of an active power factor corrector (PFC) circuit based on a buck-boost converter. First, the circuit is analyzed, and the state space mathematical model of the converter is derived. Second, Matlab/Simulink and IsSpice are used to construct and simulate the voltage-mode control model of the buck-boost power factor corrector. The intermediate-scale...
This study studies the chaos phenomenon in a UC3842 current-programmed flyback converter. The primary side magnetizing inductance current of a transformer during the conversion operation is considered in continuous-conduction mode (CCM). The nonlinear behaviors of system operation from period-1 to doubling-bifurcation and to chaos is studied by varying the input voltage of the converter. First, mathematical...
With the increase of the popularity of Web service, more and more Web applications are developed with this new kind of components. Web service quality validation and control is becoming very critical to vendors, brokers and application builders. Both brokers and users usually have to use black-box testing because design and implementation details of Web service are unavailable. This paper proposes...
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