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How to reduce the energy consumption of urban rail transit system is always the focus of attention. The automatic train operation(ATO) system operates trains between successive stations by controlling the speed automatically, which is very important for the train energy saving operation. The traditional ATO recommended speed curve optimization research is based on line information, train information...
Resonant wireless power transmission has the advantages of long transmission distance and high efficiency. Series — series (SS) transmitting and receiving system is suitable for small load research. In this paper SS-type circuit is analyzed and discussed by using equivalent circuit theory. The mathematical models of the transmission efficiency and output power are derived. The influencing factors,...
The objective of this paper is to optimize a 3/4 coil-type axial magnetic field (AMF) contact design used for 126 kV vacuum interrupter. Through central composite design and finite element calculation, axial magnetic field characteristics and loop resistance of the contact system with various design parameters were obtained. Four contact parameters including coil width w, coil height h, air gap width...
This research presents a predictive engine that integrates into an on-line optimal control planner for electrical microgrids. This controller models the behavior of the underlying system over a specified time horizon and then solves for a control over this period. In an electrical microgrid, such predictions are challenging to obtain in the presence of errors in the sensor information. The likelihood...
The efficient protection of security critical devices against side-channel analysis attacks is a fundamental need in the age of Internet of Things and ubiquitous computing. In this work, we introduce a configurable hardware design of KECCAK (SHA-3) which can be tailored to fulfill the needs of a wide range of different applications. Our KECCAK design is therefore equipped with generic side-channel...
Memristive systems are nonlinear resistors with memory. Most of them are realized as resistive switching devices in nanotechnology. One example, with appropriate properties especially in neuromorphic applications, is the double barrier memristive device (DBMD). A continuous resistance range makes the DBMD suitable for replacing the synapses in neuromorphic circuits. Structural and functional descriptions...
A real-time energy optimization management for electric vehicles with hybrid energy storage system (HESS) is presented in this paper. The HESS is combined with lithium-ion battery and ultra-capacitor. Based on the quadratic optimization strategy, the power relationship of hybrid energy storage system and the battery power loss characteristics is analyzed. A quadratic performance index is established...
The distribution of the drive power along the pathway of a belt conveyor through intermediate drive stations will benefit part of the economic factors of the installation while penalizing the rest. The resulting performance will, therefore, rely on the adequate coordination of design parameters such as the total number of drive stations, their respective size and location, the belt speed, the idler...
A well-discussed strategy to miniaturize magnetic components is to increase frequency. We consider the impact of frequency on the size of the transformer in a flyback converter. We have built a flyback transformer optimization routine that employs accurate and computationally efficient loss models to evaluate practical designs. An 18/11 pot core was picked and optimized over a range of frequencies...
This paper evaluates the accuracy in the estimation of wave resistance of ships using information available in weather forecasts. The ability to do this is important when optimizing ship routes. The common way to estimate the wave resistance is to use a so called Force Response Amplitude Operator (Force RAO) together with a wave spectrum parameterized with a small number of parameters supplied through...
This paper evaluates the use of a Photo Voltaic (PV) parameter estimation method based on implicit optimization algorithms and its use in power controller strategies by explicit model representation obtained with First and Second Order Approximation Models (FOAM, SOAM). An explicit function linking voltage, current and power of PV) cells is presented using the parameters obtained during the implicit...
Accurately modeling stationary battery storage behavior is crucial to pursuing cost-effective distributed energy resource opportunities. In this paper, a lithium-ion battery model was derived for building-integrated battery use cases. The proposed battery model aims to balance speed and accuracy when modeling battery behavior for real-time predictive control and optimization. To achieve these goals,...
The rapid development of rail transit brings a great increment of electricity, in order to reduce the energy consumption and the operating cost, energy storage technology has become a hot focus in the field of rail transit. In this paper, the power loss model of hybrid energy storage system (HESS) is established from the point of efficiency improving, which includes the loss of lithium-ion battery,...
The impact of temperature on the characteristic n+-p junction solar cells is investigated theoretically. A new model of characteristic current-voltage for crystalline solar cell as function of temperature is defined. The object of this paper is the validation and optimization of our proposed model by comparing this latter by experimental data and two models of Soto and Ishaque. A good agreement is...
The improvement of misalignment tolerance is a key challenge for the optimization of wireless power transfer (WPT) systems. WPT coil design plays an imperative role in improving the misalignment tolerance. However, misalignment tolerance needs to be considered along with the dynamics of the receiving coil. This paper presents a coil optimization method to improve misalignment tolerance according to...
In this paper, the physical mechanism and models of oxide-based resistive-switching random access memory (RRAM) and the optimization of the devices and arrays are addressed and reviewed. The review focuses on our research achievements on the unified physical mechanism, physical-based models including switching and reliability behaviors, and the optimization design issues of the oxide-based RRAM.
With rising concerns on energy and environment, the energy-efficient operation techniques in railway systems are paid more attention in recent years. The metro-transit system has some distinguishing features like short headway and a high number of stations with short interstation distance, which makes effectively using regenerative energy becoming more significant in the energy-saving study. This...
Procedures for optimal synthesis of broadband impedance transformers with predetermined phase response was proposed in this paper. The proposed method makes it possible to obtain a mathematical model of the transformer with lumped or distributed elements.
Energy efficiency of train operations is a critical issue for the electrical railway transportation, considering that one of the main benefits of this transportation mode is the lower environmental impact. A possible technology which decreases energy consumption is the reuse of the recovered energy from the braking system. Although have been made significant efforts to find efficient solutions in...
Due to the high electric energy consumption in urban railway systems, energy saving can considerably affect the cost reduction. Therefore, numerous studies have been performed in this area, one of which has been speed profile optimization. In this paper, we try to present an optimization method with two objective functions, net energy and travelling time in an interstation distance. Our aim is to...
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