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An imaging Fabry–Perot spectrometer (FPS) utilizes multiple piezoelectric actuators (PEAs) to tune the gap spacing between two optical lenses at nanometer level in order to scan the desired optical band. Due to the nonlinear hysteresis in PEAs and the mechanical coupling, the output responses of the PEAs are quite different, which cause unparallel movement of the FPS positioning stage. For precise...
The continuously variable series reactor (CVSR) is a series line reactor designed for power flow control in meshed power system networks. The CVSR is controllable using a variable dc source which establishes the magnetization of the ferromagnetic core and enables continuous modulation of the line reactance. Synthesizing a model that describes operation of the CVSR in ac networks presents challenges...
The modern power grid is becoming an interdependent Cyber-Physical Power System (CPPS). The worldwide blackouts revealed the mutual interdependences render the CPPS more vulnerable to cascading failures. The percolation theory is a useful tool to analyze and simulate the cascading failure in interdependent networks. However, the current percolation theory is based on purely topological analysis. This...
Autonomous Orbit Determination Method based on stellar refraction is a navigation method with low cost and high precision. At present, domestic and foreign studies on this method mainly focus on Low Earth Orbit (hereinafter referred to as "LEO"). To meet the medium-high orbit satellite's urgent need for autonomous navigation, this paper provides a full-time-running and high-precision stellar...
Time series analysis, an important domain of machine learning and data mining, has attracted much research interest in the previous decade. Part of the research efforts have focused on analyzing stock data, which is a major application of time series analysis. However stock data is always considered as a unidimensional sequence in recent research lacking of the whole market perspective. This paper...
The principle of full-bridge DC-DC converter is briefly expounded, including the two typical control methods, named limited dual polarity hard-switch control and phase-shifted soft-switch control. Then the common mode noise equivalent circuits of full-bridge DC-DC converter are deduced, taking the common mode noise of the bridge leg's midpoint into account, and the difference between the two typical...
Magnetostrictive actuators exhibit inherent asymmetric hysteresis nonlinearities. In this paper, an asymmetric shifted Prandtl-Ishlinskii (ASPI) model was first proposed, being composed by three components: a Prandtl-Ishlinskii (PI) operator, a shift operator and a Lipschitz-continuous function. The benefits for such a model are that it can represent the asymmetric hysteresis behavior and facilities...
Network Centric Warfare (NCW) concept has been developed over ten years, but some misunderstanding is still in existence. The Command and Control, Battle Management, Communications (C2BMC) system of U.S. Ballistic Missile Defense System is one of the cases which employs NCW concept successfully. In this paper, the successful reason was found by the work of information dissemination modeling and then...
For a dynamic fault tree (DFT) that models dynamic system, the occurrence of top event depends on not only the combination of basic events, but also on the occurrence order of basic events. Cut sequence is a set of basic events that fail in a particular order that can induce top event. Cut sequence set (CSS) model uses cut sequences to analyze the dynamic behaviors of dynamic systems, and if includes...
Photocatalytic degradation of endocrine disrupting chemical bisphenol A (BPA) by TiO2 with 245 nm ultraviolet (UV) light was studied in a batch reactor. Response surface methodology (RSM) and central composite design (CCD) were employed to optimize three parameters, viz. TiO2 concentration, initial BPA concentration, and UV light intensity. The optimized conditions of photocatalytic degradation of...
Although there are abundant achievements in the area of satellite network simulation, but there is no formal description for the simulation objects, which leads to the lack of semantic support in the simulation. In order to guarantee the reusability and interoperability of heterogeneous models/services in satellite network simulation and provide verification support, an ontology-based method is proposed...
It is only an order quantity which is decided for a spot selling time in the previous supply chain contract with options. However, the effect of the lead-time on the supply chain is indispensable. This paper considers the options contract with the time-based parameters on the background of food supply chain in which the model analyze that the contract parameters and accuracy of forecasting demand...
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