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Electromagnetic emission spectrum is the reflection of inherent properties of EUT. But time-domain parameters are sometimes required to trouble-shooting or modeling. However, since the phase information of the test emission spectrum is missing, it's hard to obtain the time-domain waveform and its parameters using inverse Fourier transform directly. While, for the emission spectrum generated by periodic...
In this paper, a parasitic extraction method of PIN diode is proposed based on analyzing the ringing signal in Switch Mode Power Supply (SMPS). As the charge-discharge of filter capacitor and parasitic parameters of PIN diode, ringing occurs in filter circuit of a simple SMPS. Relationship between characteristic parameters of ringing in time/frequency domain and parasitic parameters of PIN diode is...
Diseases caused by parasitic helminths cause considerable production and economic losses in livestock worldwide. Understanding the epidemiology of these parasites has important implications for controlling them. The main purpose of the present study was to estimate the prevalence of key parasitic helminths in goats along the Han River in Zhanggang, Hubei Province (from January to December 2014). We...
This paper proposed a new method to characterize the harmonic components from Electromagnetic Interference (EMT) spectrum, which is based on the Grey System Theory and the Fourier Envelope Theory. The proposed method first characterizes the harmonic components from the EMI test data. Then proper time-domain component model (e.g. square, sinusoidal, or convergent oscillation, etc) is identified based...
Background Hypoderaeum conoideum is a neglected but important trematode. The life cycle of this parasite is complex: snails serve as the first intermediate hosts: bivalves, fishes or tadpoles serve as the second intermediate hosts, and poultry (such as chickens and ducks) act as definitive hosts. In recent years, H. conoideum has caused significant economic losses to the...
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