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In this study, a well-controlled etch-back technique was developed using HF and HNO3 mixture solution to remove the boron depletion layer caused by post-oxidation step. The etching rate can be manipulated by changing HF proportion; meanwhile the sheet resistance variation can be maintained smaller than 10% after etching back. Nitric acid oxidation of Si technique was used to passivate the boron emitter...
A new filtering robust adaptive formation guidance law is proposed for unmanned surface vehicles (USVs) in the presence of uncertain leader dynamics. Using the approximation properties of neural network (NN) and adaptive bounding technique, the developed controller does not require the knowledge of the velocity of the leader. The derived guidance law is a velocity command for the follower and guarantees...
Three kinds of approximators are widely used in adaptive controllers for the nonlinear systems with uncertainty. They are neural network, fuzzy logic systems and wavelet approximator, respectively. By unifying these three approximators, we developed an on-line approximation based controller for a class of uncertain nonlinear systems. It is proved that with the proposed control law and update laws,...
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