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In order to study the influence on the statistical distribution characteristic of dynamic radar cross section (RCS) from aircraft flight speed, firstly through analyzing aircraft aerodynamic, setting track model, calculating attitude angle and electromagnetic simulation, the three groups of dynamic RCS sequence were obtained under different flight speed. And the fitting curves of dynamic RCS sequence...
Based on the special transform of graphics, the general mathematical geometric models of different wire ropes with defined initial parameters are presented. On this basis, the geometric model of IWRC6*36WS wire rope is set up by using Matlab and Pro/E. Abaqus/Explicit is used to analyze the elastic property of the wire rope under axial tension. The simulation analysis results show that the nonlinear...
High-resolution climate simulations are increasingly in demand and require tremendous computing resources. In the Community Earth SystemModel (CESM), the Parallel Ocean Model (POP) is computationally expensive for high-resolution grids (e.g., 0.1°) and is frequently the least scalable component of CESM for certain production simulations. In particular, the modified Preconditioned Conjugate Gradient...
In this paper, an on-board charger for electric vehicle, with two-stage power converter, is designed. Firstly, a single-phase Boost-APFC (Active Power Factor Correction) circuit controlled by a one-cycle controller is designed as the front state converter. Compared to the traditional APFC circuit, the One-cycle controller is constructed without considering the multiplier and AC line voltage sensing...
This paper addresses a unified method to robustly stabilize uncertain non-minimum-phase linear systems via output feedback. We firstly prove that, for any non-minimum-phase linear system, there always exists a realizable linear dynamics such that the series system can be transformed to a certain interconnection form. Then, based on an output feedback control law for stabilization of a related minimum...
This paper presents a design of a four phase 25% duty cycle of 400MHz DLL with calibration. To avoid the disadvantages of digital calibration method, it introduced an all-analog calibration method. Instead of DAC, CP is used in calibration loop to save power consumption and area occupying. With a 4 channel time-interleaved 6 bit flash ADC, the simulated results show that SNR is 30.8dB and 43.6dB with...
This paper presents a simple method for modeling smoke from a single view, which could preserve fine realistic look observed from different views. Thin translucent smoke, generated by cigarette, candle, joss stick et al, is the main focus of this paper. The proposed method initially computes the smoke intensity from the input key frame image, then partitions the smoke into multiple segments. For each...
The neighborhood structure of a pixel in an image can be described more accurately by its two principal curvatures than its gradient or mean curvature-based estimation. Based on this idea, we propose a novel method - minimum principal curvature-driven diffusion, in which the two principal curvatures are used in a curvature-driven diffusion equation for image filtering. The main advantage of the proposed...
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