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With China Remote Sensing career advancement, a large number of independent researches and development satellites have launched. Among a new generation of high-resolution satellites, GaoFen-1 (GF-1) stands out. It sets high spatial resolution (2 m-16 m), multi-spectral and high temporal resolution (4-day) with 60 km-800 km swath in a fusion technology with strategic significance. In order to explore...
The dynamic load strength test of bumper system is an important parameter for vehicle passive safety, but different test standards, different test requirements, which caused much trouble to the test authority. So dynamic and energy analysis based on bumper system low-speed collision test is very impotant. Build parameterized model of bumper system, analyse the dynamic characteristics and energy conversion...
One of the most fundamental issues in network virtualization is the virtualization of the substrate nodes. Reconfigurable Router (RR) realizes a flexible router architecture based on the idea of hardware virtualization which is performed by component-based processing and reconfiguration. But if the components are incompatible with each other in terms of performance, the RR will get lower performance...
Based on results of X-ray diffraction experiment, multirange fractal approach has been used to discuss the discontinuous microstructure changes of Sn melt. Partially-overlapping multirange fractal structure is observed, and as temperature decreases from 900°C to 240°C, low fractal dimension reveals discontinuous changes from 2.8682 to 2.4192, which can divide the cooling process into three regions...
On the basis of steady-state design, mathematical model of closed-loop servo system, by means of a certain degree of simplification, was derived employing dynamics theory. System dynamic performance was analysed using Matlab software, with overshoot of 60.86% and rise time of 0.1284 seconds, implying that system response stability hardly satisfied actual application. Therefore, the original system...
The appropriate control strategy of grid-side converter (GSC) under unbalanced grid fault is important for wind power generator's fault-ride-through (FRT) capacity. Based on the basic principles of voltage space vector control, this paper studied the mathematical model of GSC under unbalanced grid conditions, and developed one efficient separation method of positive and negative sequence components...
In odder to improve positioning precision and decrease the exceed initial value of solar cell transfer robot, we design a kind of PID controller with fuzzy self-adjusting function based on fuzzy control technique, solve the problem that the PID-controller can not adjust parameters itself on line. The result of simulation in fuzzy logic toolbox of Matlab proves that the controller possess both the...
In order to realize the correlating of solar cell's I-V curve, and to obtain the craftwork parameters, we do research on fitting algorithm of solar cell's I-V curve with IRAGA. Firstly, according to the characteristics of solar cell's mathematical model equation, it brings forward correlating with IRAGA. Secondly, we analyze the problems of IRAGA. On the basis of them, we put forward some improved...
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