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PIXHAWK is a low-cost and high-performance autopilot, which inherits the advantages of APM and PX4, and makes improvements on the basis of it. PIXHAWK is a dual processor Flight Controller with a strong computing power of 32 bit STM32f427 Cortex M4 MHz/256 core 168KB RAM/2MB Flash bit processor. There is also a major position in the industrial use of the co-processor 32bit STM32F103, and it is safe...
A new large-signal I–V model for GaN HEMT is presented in this paper based on the operational principle of devices and the traditional Angelov nonlinear I–V model. The least squares method and genetic algorithm are used to optimize the parameter extraction, and MATLAB is used to realize it. The simulation result fits well with the measured data, and the extracted model parameters have certain physical...
We have invented a high-performance GPU based volume rendering algorithm on the ubiquitous WebGL platform. As WebGL is emerging as a standard platform for web applications on mobile devices, a remarkable advantage of our approach is that the advanced volume rendering algorithms can run directly on mobile devices such as smart phones and tablets in which GPU is embedded, anywhere and anytime. Technically,...
A modified algorithm is proposed according to the multi-objective constrained optimization problems. In order to let constraint conditions convert to an optimization objective used a transform strategy, which is a satisfactory summation function of constraint conditions, to accelerate the convergence rate, a new region changed acceleration mechanism is used, and for shake of improving the local search...
Based on three dimensional, steady, incompressible N-S equation and k-ε turbulence model, finite volume method was adopted to carry out analysis of aerodynamic performance of double container car with three loading schemes. Results show that: with no wind, aerodynamic drag and lift force of the first scheme are bigger than the others which are nearly the same. With different wind directions, the lateral...
In this paper, the author make the grey forecast united with the fuzzy synthetic assessment to determine the regional classification problems for regulating and planning groundwater. In this case, the following models are adopted to forecast the water quality system: GM(1, 1) model groups, GM(1, 1) residual difference model, GM(1, N), GM(1, 1) Weighted model.
Based on harnessing the Yellow River, a multi-nozzles pile extractor was developed. Multi-nozzles submerged jets of extracting pile component were simulated numerically by the RAN k-ε model and the Ansys software. The reasonable structure was attended and tested by experiment. The simulated numerically results showed that the simulated numerically method was an effective way which was used to study...
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