Working principle for a four-axis oblique intersection line welding robot is analyzed. A mathematical model for welding torch orientation angle is established, and an interpolation algorithm based on time division is ...Working principle for a four-axis oblique intersection line welding robot is analyzed. A mathematical model for welding torch orientation angle is established, and an interpolation algorithm based on time division is proposed. The algorithm makes all interpolation points fall on a required curve in theory with no accumulated errors and a direct interpolation control on the saddle-shaped curve trajectory and space orientation angle can be achieved. It is shown by MATLAB simulation that the algorithm is real-time and fully meets the precision requirement. The algorithm has been applied to real robots.展开更多
Our previous studies indicated that transcription factor Brn4 could promote neuronal differentiation of hippocampal neural stem cells,but its molecular mechanism remains unknown.In this research,we used high-throughpu...Our previous studies indicated that transcription factor Brn4 could promote neuronal differentiation of hippocampal neural stem cells,but its molecular mechanism remains unknown.In this research,we used high-throughput sequencing methods,RNA-seq and ChIP-seq,to detect the changes of gene expression level in Brn4 overexpression cells.The RNA-seq results were screened based on the difference of more than 1.5 times and intersected with ChIP-seq.The 16 genes in the intersection were considered as candidate genes.展开更多
文摘Working principle for a four-axis oblique intersection line welding robot is analyzed. A mathematical model for welding torch orientation angle is established, and an interpolation algorithm based on time division is proposed. The algorithm makes all interpolation points fall on a required curve in theory with no accumulated errors and a direct interpolation control on the saddle-shaped curve trajectory and space orientation angle can be achieved. It is shown by MATLAB simulation that the algorithm is real-time and fully meets the precision requirement. The algorithm has been applied to real robots.
文摘Our previous studies indicated that transcription factor Brn4 could promote neuronal differentiation of hippocampal neural stem cells,but its molecular mechanism remains unknown.In this research,we used high-throughput sequencing methods,RNA-seq and ChIP-seq,to detect the changes of gene expression level in Brn4 overexpression cells.The RNA-seq results were screened based on the difference of more than 1.5 times and intersected with ChIP-seq.The 16 genes in the intersection were considered as candidate genes.
