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Planar coils with litz wires are used a lot in inductive power transfer for electric vehicles. When the litz wire is properly selected for the coil, the winding resistance is composed of DC resistance and proximity-effect resistance. The calculation of DC resistance is simple, using the cross-sectional area and the length of the wire, but the calculation of proximity-effect resistance is complicated,...
The stray magnetic field around inductive-power-transfer coils is influenced by the phases of the transmitter's and receiver's currents. This influence is analyzed with the diagrams of phasors for the currents and magnetic fields. The dual-side-controlled converter is applied for the circuit realization, in which the bridges with MOSFETs are used for the inverter on the transmitter side and rectifier...
Recently, the community of style transfer is trying to incorporate semantic information into traditional system. This practice achieves better perceptual results by transferring the style between semantically-corresponding regions. Yet, few efforts are invested to address the computation bottleneck of back-propagation. In this paper, we propose a new framework for fast semantic style transfer. Our...
Programmers depend on virtual platforms, such as Android-QEMU, to build and test their applications as well as system software for the ease of development efforts. It is easy to add tracing modules to the virtual platforms to dump the execution trace of the guest system, which can then be used to estimate and evaluate the performance of alternative system designs. However, tracing in virtual platforms...
Early power modeling and analysis using electronic system-level methodology enables designers to explore energy saving opportunities more efficiently at a higher abstraction level. However, power modeling for third party IPs are challenging due to the limited observability and unknown architecture details. To model the data dependency for blackbox IPs, several works rely on adopting Hamming distance...
This work presents a new pixel circuit composed of six low-temperature polycrystalline-silicon (LTPS) thin-film transistors (TFTs) and two capacitors for active-matrix organic light-emitting diode (AMOLED) displays. New auto-compensation method is developed by cancelling the reference voltage which is required in general compensation circuits, thus improving the aperture ratio of pixel. By adopting...
This work proposes a new pixel circuit of low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance...
We present RON, an efficient and effective framework for generic object detection. Our motivation is to smartly associate the best of the region-based (e.g., Faster R-CNN) and region-free (e.g., SSD) methodologies. Under fully convolutional architecture, RON mainly focuses on two fundamental problems: (a) multi-scale object localization and (b) negative sample mining. To address (a), we design the...
In this paper, we propose an alternative method to estimate room layouts of cluttered indoor scenes. This method enjoys the benefits of two novel techniques. The first one is semantic transfer (ST), which is: (1) a formulation to integrate the relationship between scene clutter and room layout into convolutional neural networks, (2) an architecture that can be end-to-end trained, (3) a practical strategy...
This study intended to develop an assessment program based on three BW cognitive diagnostic models, i.e., response pattern model, concept mastery model, and competence proficiency model. The first model was designed to measure the probabilies for individual students answering items correctly. The second and third models were designed to measure probabilies for individual students mastery on specific...
Comparing with the indirect drive gimbal servo system of single gimbal control moment gyroscope (SGCMG), direct drive gimbal servo system based on permanent magnet synchronous motor (PMSM) can achieve higher precision and faster response. However, the difficulty of PMSM controller design increases, because PMSM has to endure larger multi-source and multi-band disturbances due to the lack of a decelerator...
In this paper, we developed a high-level simulation model for DRAM controllers to capture such features as burst alignment, scheduling policies, etc. The model is based on SystemC/TLM for ESL platform integration. Compared to a commercial RTL implementation, the model has a worst-case error of 4.5%. Due to its fast simulation speed, we then apply the model to demonstrate two design trade-offs. The...
In hydraulic piping system, health management has become a challenging task. As operating in harsh environment, damage detection and fault diagnosis are important to hydraulic pipes. In this paper, an intelligent monitoring system is proposed for hydraulic pipes based on multiple sensors. Firstly, it collects and records various parameters of pipes such as vibration, hydraulic pressure, temperature,...
Efficiency and stray magnetic field are two important factors for coils design in inductive power transfer. By adding passive shields to the coils, stray magnetic field is significantly attenuated. However, coils' efficiency is reduced due to losses of the shields. Both efficiency and stray magnetic field should be considered for fair comparison of shields' performances. Four kinds of passive shields...
Efficiency and stray magnetic field are influenced simultaneously by design of planar coils in inductive power transfer. Their synergetic optimization is lacking in previous literature. Parametric sweep in finite-element simulation is one method for optimization but it's time-consuming because thousands of simulations are required. A faster method using matrix calculation is described in this paper...
We report strong and non-volatile optical modulation utilizing electron-doping induced phase change of a perovskite, SmNiO3. Broadband modulation (λ=400nm–17μm) is demonstrated using thin-film SmNiO3, and narrowband modulation is realized with metasurfaces integrated with SmNiO3.
GaSb-based type-I quantum well wide ridge multimode cascade diode lasers generate more than 360 mW near 3.25 μm at room temperature. Double-step narrow ridge waveguide lasers were fabricated to achieve single spatial mode operation with minimal threshold.
Waveguide superlattices are recently introduced for dense space-division multiplexing and high-density waveguide integration. Here we show that in presence of bending, properly designed waveguide superlattices retain low crosstalk at 1μm pitch and 20μm radius.
Using the quantum Cramér-Rao bound, we prove that Rayleigh's criterion is fundamentally irrelevant to the estimation of the separation between two incoherent optical sources. We also propose measurement schemes that attain the bound.
The global material supply chain for modular construction, consisting of assemblies prefabrication, material delivery and handling, module assembly, and site installation, can be regarded as a “Big Site”problem. With a combination of various transportation modes (i.e., trucks, ships, and rails), insufficient logistic planning on the capacity and time availability of unloading bays and transportation...
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