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The sub-frame which insulates the vehicle chassis from the high frequency excitation of the engine has a great influence on vehicle performance. Currently, the research on the influence of sub-frame on vehicle performance mainly aims at the vehicle vibration attenuation and noise reduction performance, and there is a lack of research on vehicle handling stability and the accurate description of the...
Environmental control and life support system(ECLSS) of the manned spacecraft is an important system to guarantee the safety and life support of the astronauts and the environment inside the space station. For the physicochemical regeneration type of ECLSS(PRLSS), because of its complicated physicochemical process, to analyze and evaluate the mass balance and operation performance through simulation...
Operation principle and conceptual design of a non-uniform square loop circularly polarized (CP) antenna is proposed. At first, the even-mode square loop antenna with perimeter of one wavelength is analyzed by employing a simplified equivalent sources model. The inherent circularly polarized characteristic is theoretically revealed, and then used to conceptually design a non-uniform, bi-sensing square...
Land development intensity is one key indicator of Major Function Oriented Zoning (MFOZ). For land development intensity monitoring in a large area, SAR image time series with medium resolution provides an appropriate way, because of its large-scale and high-temporal frequency measurements. According to time-series characteristics of cultivated land and construction land pixels, a spatio-temporal...
The electrode erosion is a serious problem for pulsed power switches working under high current. A rotary-arc gap switch (RAG) is the switch form that can reduce the electrode erosion through the fast rotation of the arc. A RAG with a coaxial cylindrical structure is designed in this paper, mainly composed of two electrodes and two coils. The finite-element-analysis software Ansoft is used to simulate...
A new method dealing with high speed target (HST) detection in pulse-Doppler (PD) radar is proposed. By utilizing Keystone Transform (KT) and linear range walk rectification, the range walk can be removed completely. The method is also compared with the Hough Transform (HT) and Complex Radon Transform (CRT). The simulated data validates the method and the analysis.
In this paper, a SIRS epidemic model with immunization on sparsely distributed regular lattice is proposed. Based on the model, we research the effects of immunized rate, crowd-density, spread efficiency and moving activity of agents on disease spread. The theoretical analysis and analog simulation indicate that immunization can increase the spreading threshold. Besides, there is a critical threshold...
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