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Due to the uneven geographical distribution of rare earths (RE), most countries obtain RE on the international market. Trade patterns and trading countries’ role characteristics are two important aspects to understand the current status of world RE trade and furthermore to formulate RE trade policies for each trading country. A complex network theory is adopted to analyze the world RE trade based...
This paper analyzes the voltage-source-inverter parallel system as a multi-input & multi-output system, and proposes the circulating-current mathematical model, the steady-state model and small-signal model of parallel system. Then the phasor models of the circulating-current and the circulating-current power are proposed. Subsequently, the mathematical model of traditional droop control is built...
As the most widely used wind turbine generating system, the Doubly-fed induction generators, whose output characteristics is worth studying in depth when connected to the grid. In order to study output characteristics of Doubly-fed wind turbines, simulate the response characteristics of the units' main parameters under different wind conditions with the aid of Bladed software. The establishment of...
The telecare medicine information system (TMIS) allows patients and doctors to access medical services or medical information at remote sites. Therefore, it could bring us very big convenient. To safeguard patients’ privacy, authentication schemes for the TMIS attracted wide attention. Recently, Tan proposed an efficient biometrics-based authentication scheme for the TMIS and claimed their scheme...
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