Nowdays there are several manual or half-automatic methods developed to drivethe DNA micro-fluid of transgenic micro-injection and they often fail to control precisely theinjection volume at picolitres level. Micro-si...Nowdays there are several manual or half-automatic methods developed to drivethe DNA micro-fluid of transgenic micro-injection and they often fail to control precisely theinjection volume at picolitres level. Micro-size of the injector tip and viscosity of the DNA liquidalso lead to dead area of volume control. An adequate way is presented utilizing temperaturegradients to direct liquid flow in the pipette from the wanner to the cooler. Compared with theprevious ones, this way is helpful in decreasing the dead area of controlling through decreasing theviscous rate of DNA liquid, which changes as the temperature varies. The DNA liquid is pushed by asheer Stress at the liquid-pipette interface, which emerges when viscous rate of the liquid changes.Preliminary experimenting results show the efficiency and convenience of this way in improving thesystem's characteristics.展开更多
We present here a stability condition and its verification method for the time\|invariant nonlinear system. This stability condition is based on the small gain theorem in regard to L\-2 gain, and its verification ...We present here a stability condition and its verification method for the time\|invariant nonlinear system. This stability condition is based on the small gain theorem in regard to L\-2 gain, and its verification method is described by the Nyquist criterion and the modified M\|circle set(alike to Popov’s criterion). In order to verify the above system stability, we assume the system nonlinear part as a non\|linear subsystem with a free parameter q≥0, and focus on the change of some peak value of the relative position between the vector locus of the open loop frequency response characteristic and the modified M\|circle set, which may be available for stability analysis and robust design of the control system.展开更多
基金This project is supported by National Natural Science Foundation of China(No.60075023)Provincial Natural Foundation of Guangdong, China(No.20000041).
文摘Nowdays there are several manual or half-automatic methods developed to drivethe DNA micro-fluid of transgenic micro-injection and they often fail to control precisely theinjection volume at picolitres level. Micro-size of the injector tip and viscosity of the DNA liquidalso lead to dead area of volume control. An adequate way is presented utilizing temperaturegradients to direct liquid flow in the pipette from the wanner to the cooler. Compared with theprevious ones, this way is helpful in decreasing the dead area of controlling through decreasing theviscous rate of DNA liquid, which changes as the temperature varies. The DNA liquid is pushed by asheer Stress at the liquid-pipette interface, which emerges when viscous rate of the liquid changes.Preliminary experimenting results show the efficiency and convenience of this way in improving thesystem's characteristics.
文摘We present here a stability condition and its verification method for the time\|invariant nonlinear system. This stability condition is based on the small gain theorem in regard to L\-2 gain, and its verification method is described by the Nyquist criterion and the modified M\|circle set(alike to Popov’s criterion). In order to verify the above system stability, we assume the system nonlinear part as a non\|linear subsystem with a free parameter q≥0, and focus on the change of some peak value of the relative position between the vector locus of the open loop frequency response characteristic and the modified M\|circle set, which may be available for stability analysis and robust design of the control system.
