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Battery energy storage management for electric vehicles and hybrid electric vehicles is the most critical enabling technology. A battery system is a complex electrochemical phenomenon whose performance degrades with ageing and the existence of varying material design. Moreover, it is very tedious and computationally very complex for monitoring and controlling the internal state of battery's electrochemical...
In the well-recognized cloud radio access networks concept, radio-over-fiber (ROF) links can serve as an option to make fronthaul connections conveying multi-band radio signals. High-performance ROF links covering future higher frequency commonly rely on external modulation. However, externally-modulated ROF links suffer from inherent modulator nonlinearities. In order to address this issue, we investigated...
In this paper, we focus on designing an impedance transformer with two sections and capable of achieving matching at two arbitrary frequencies. Specifically, the problem is formulated as minimizing the reflection coefficient by finding the optimal value of characteristic impedance and line length for the two section transmission line under the constraints of limited value for characteristic impedance...
This paper proposes a dual-frequency location scheme combining WLAN and RFID signals at different frequency bands to conduct indoor location together in radio-over-fiber (RoF) systems. Using dual-frequency method, the wallboard attenuation can be estimated more accurately. In particular, we propose three procedures for wallboard auto-detection and free-space propagation model calibration which perform...
In high dimensional data space, clusters are likely to exist in different subspaces. K-means is a classic clustering algorithm, but it cannot be used to find subspace clusters. In this paper, an algorithm called GKM is designed to generalize k-means algorithm for high dimensional data. In the objective function of GKM, we associate a weight vector with each cluster to indicate which dimensions are...
In this study, using the quadratic saturation 310 D-optimal design method, we examined the effect of kinetin (KT), gibberellic acid (GA), and naphthalene acetic acid (NAA) on microrhizome production in ginger. The effect of GA on rhizome induction was larger than that of KT or NAA. Using simulation and optimality selection for tissue culture, we found that concentrations of GA, KT, and NAA of 1.33–2...
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