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The symmetrical compensation is widely used in inductive power transfer (IPT) system due to the advantages of achieving good coupling coefficient when the coils are perfectly aligned and easy to design. This paper investigates a general tuning method for voltage-fed symmetrical higher-order resonant networks for achieving load-independent transconductance. With the proposed tuning method, a resonant...
Short-term prediction of water demand provides basic guarantee of water supply system operation and management. In this study, an effective model for daily water demand forecasting is proposed. Firstly, principle component analysis (PCA) is utilized to simplify the complexity and reduce the correlation between influence variables, and the score values of selected principle components (PCs) turn into...
This paper is intended to investigate a variable series-series (SS) compensation network of the loosely coupled transformer (LCT) in the inductive power transfer (IPT) system. With the proposed compensation network, an additional switch is used to facilitate the transition from the LC resonance condition to three order T-type resonance condition with the same operating frequency to achieve constant...
Inductive power transfer (IPT) is the most wide method of wireless power transfer (WPT). In this paper, based on switching double-sided LCC and LCC-S compensation network, constant voltage (CV) output and constant current(CC) output under the conditions of the fixed resonance frequency are realized. The equivalent models of leakage inductance for CC output and mutual inductance equivalent model for...
Inductive Power Transfer (IPT) has proved its capability as a safe, convenient and efficient solution for electric vehicle (EV) charging systems through loosely coupled transformer. Transformer with double-sided windings is expected to be more compact and lightweight than transformer with single-sided windings. In this paper, a solenoid double D (SDD) coil is proposed to have a good interoperability...
In this paper, based on a double-sided LCC compensation network, the leakage inductance equivalent model of the loosely coupled transformer (LCT) is built and the constant current (CC) output with load independent is analyzed in an inductive power transfer (IPT) system. This paper proposes four resonance conditions for achieving constant voltage (CV) output in various load conditions for the compensation...
In this paper, an improved Levenberg-Marquardt (LM) algorithm with adaptive learning rate is proposed to optimize the learning process of RBF neural networks. First, an improved LM algorithm is adopted using a quasi-Hessian matrix and gradient vector which are computed directly. Compared with the conventional LM algorithm, Jacobian matrix multiplication and storage are not required in the improved...
Silicon carbide (SiC) MOSFET is a new type of high voltage power switching device, featuring by low on-state resistance and fast switching speed. In recent years, it has received extensive research and application due to its prominent advantages of high temperature and high frequency, the comparisons and analysis of switching characteristic of SiC MOSFET and traditional silicon (Si) MOSFET is of great...
With the development and wide use of the EV (electric vehicle), the subject of the loosely coupled transformer has become an important topic in the ICPT (inductively coupled power transfer) system. In this paper, the loosely coupled transformer in the ICPT system was modeled, and permeability material of the flat spiral coil structure was analyzed and optimized for the small and medium-sized electric...
In order to solve the problem about the partition of Petri net model and subnet division, realize the concurrent execution or simulation runs of Petri net system, the partitioning algorithm of parallel subnet of Petri net is proposed. First, as Petri net system has the characteristics of synchronization and concurrence, provide the place-invariant based Petri net model partitioning and subnet division...
In order to solve parallel algorithm of Petri net system with concurrent functions and implement parallel control and execution of Petri net, parallel programming model of Petri net based on multi-core clusters is put forward. First, P-invariant technology is used to do the functional division of Petri net system and the parallel analysis of Petri net process. Next, based on architecture of multi-core...
To solve the parallelism algorithm of Petri network system with parallel feature and implementing paralleling control and execution of Petri network, we propose the analysis and algorithm design of Petri network process. Based on employing P-invariants to partition the function of Petri network system, we firstly analyzed the situations of parallelism between processes, checked the effects of the...
Chaos-based image encryption techniques have recently been extensively studied due to their superior properties in efficiency. However, many of the proposed schemes suffer from known/chosen plaintext attacks as the key stream used in diffusion stage is usually solely determined by the key. This paper suggests a chaos-based symmetric image cipher with a plaintext-related key stream generation mechanism...
This paper presents an efficient way to maximize the throughput of mixed batch/continuous process based on integrated hybrid time Petri nets and genetic algorithm. The scheduling problem of process is mapped as the solution of the optimal regional state sequence in HTPNs. The transition firing decision model is developed according to the enabling and firing rules, and a genetic algorithm of scheduling...
With the aim of solving the problems of the Petri nets to the place/transition nets automatic conversion and realization of Petri nets parallel control and running, the algorithm is proposed to transform Color Petri net systems transform into P/T nets. The algebraic model of colored Petri nets and P/T nets, and its intrinsic mechanism is analyzed, the process and theory verification of the colored...
Ear detection is the most important step of an ear recognition system, and the detection effect of this step directly affects the performance of the whole recognition system. according to the structural characteristics of the ear itself, this paper makes improvement on the traditional AdaBoost algorithm in view of its deficiency. There are three key contributions in this paper. The first contribution...
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