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The contour accuracy of XY table directly driven by two linear motors was influenced by nonlinear friction of dynamic system. On the basis of analyzing the contour error of the system, the control strategy combining state observer and sliding-model controller with the cross coupling controller (CCC) was presented in the paper. A sliding-model state observer was proposed to estimate state z which was...
To improve the contour machining precision of XY table, the control strategy combining H∞ velocity feedback controller and Tangential-contouring Controller (TCC) was presented on the basis of analyzing the contour error of system. The H∞ control theory was used to design a feedback controller in order to guarantee robust stability and robust performance of the closed-loop system under the condition...
We here analyzed the correlation between the genic GC content and the temperature range conditions of prokaryotes. To identify those genes whose surrounding GC levels exhibit patterns different for organisms under different temperature conditions but transcending phylogenetic boundaries, we first focused on the complete list of organisms, then partial lists of organisms with one phylum being excluded,...
Metagenomics is to study microorganisms by directly extracting and cloning their DNAs from the environment without lab cultivation or isolation of individual genomes. Assembling of metagenomic DNA fragments is very much like the overlap-layout-consensus procedure for assembling isolated genomes, but is augmented by an additional binning step to differentiate scaffolds, contigs and unassembled reads...
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