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The stellarator Wendelstein 7-X (W7-X) has been designed to show that optimized stellarators can achieve and sustain fusion relevant plasma conditions. One of the main optimization criteria was the reduction of the neoclassical transport, which is considered as one of the most critical issues of the stellarator concept. While the demonstration of the neoclassical optimization will definitely be one...
Single image-based HDR imaging can inherently remove ghost artifacts which appear in multiple image-based HDR imaging. Most existing single-exposure HDR imaging methods apply complicated handing to overexposed areas in image, which perplexes the algorithm and introduces the probability of generating artifacts; moreover, they do not take into account the imaging properties of the camera. In this paper,...
Recognition between true and false ballistic warheads is an important problem in missile defense. In this paper, a multiple-input multiple-output (MIMO) radar with distributed antennas is employed to observe the scene from distinct directions to gain multi-dimensional information of the warheads. A state space model (SSM) is developed to describe the motion behavior of the warheads (state equation)...
The micro-motion characteristics of warheads have been utilized to discriminate false warheads from true ones. To obtain accurate dimensional measurements, a multiple-input multiple-output (MIMO) radar is adopted to observe the kinetic information of the warhead. A distributed state space model (SSM) is built and the differences between the true and false warheads are characterized as different system...
High-frequency planar transformers are widely adopted for power converters. They are also sources of unwanted parasitics such as winding resistances and leakage inductances. Thus, a good electrical model of high frequency planar transformers is essential for accurate circuit simulation of switched-mode power converters. In such cases, it is necessary to represent a transformer with a precise equivalent...
The spin waves have attracted huge interest in recent years due to the possibility to use spin waves to excite, transfer and process electric signals. The application depends on the ability to manipulate the propagation of spin waves. Using the principle of Bragg refection, the periodic magnetic nano-structures have been introduced to manipulate the dispersion relations of propagating spin waves by...
To suppress traffic jam, we proposed a new modified coupled map car following model with proportional velocity difference factor. In this new kind of model, the full velocity difference value between two successive vehicles was incorporated into following vehicle's acceleration running equation. By taking the small velocity disturbance of preceding vehicle as error input, the system stability dynamics...
Nonlinear vibration analysis of a single-walled carbon nanotube, using the Eringen nonlocal elasticity and Euler-Bernoulli beam theories, is carried out. Pasternak-type foundation and the simply-supported boundary conditions are assumed for the carbon nanotube and the governing equation of motion is developed using those theories. The Galerkin method is utilized to obtain the nonlinear ordinary differential...
Nonlinear oscillation of nanowires, based on the Timoshenko beam theory, are investigated. The analytical solution of the nanowire structure using the Galerkin technique together with the variational iteration method is developed. A coupled nonlinear differential equation is obtained utilizing the Galerkin technique. Subsequently, the frequency-amplitude relationships are found for the nonlinear vibration...
We have studied the influence of the Cu-doping on the critical properties of a polycrystalline sample of prepared by solid-state reaction. Analyses of static magnetization data in the vicinity of the ferromagnetic-paramagnetic phase transition based on the modified Arrott plot reveal critical parameters of ...
Natural image matting is one of the major challenges in modern image editing, whose goal is to estimate fractional opacity of foreground layer from an image and recover the colors of the foreground/background layers respectively. Most of existing methods require complicated mathematics computation and are implemented on a single processor. The closed-form matting [1] is relatively faster and more...
In this paper, we aim to address the challenges of atomistic simulations posed by traditional ab-initio modeling approaches for electronic structure calculations. We propose to demonstrate the robustness of our real-space mesh modeling framework capable to produce well-suited and scalable problems for addressing large-scale ab-initio simulations. First-principle simulations are performed solving the...
In order to address the high numerical cost for computing the electron density of large-scale atomistic nanowire devices, we investigate the relevance of mode decomposition techniques (i.e. mode approach) for solving the Schrodinger-type equation within a real-space mesh framework. It is shown how the full mode approach or its asymptotic counterpart can be of benefit to two distinct highly efficient...
In this paper, by using support vector machine (SVM) regression, the simulation model of the influences of stakeholders on capital management in commercial banks is established. The results are tested by utilizing the samples of Chinese joint-stock commercial banks during the period of 1999-2006 and compared with results of PLS regression and BP neural network. The result is gotten that the forecasting...
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