For the system under a PI control,the stable region of the feedback gains was determined on the basis of stability switches and D-subdivision,and the optimal f.

This paper, based on several business cycle models, considering time delay(wherever in capital accumulation or tax collection, whatever fixed or distributed time delay) into business cycle system, will explore the impacts of time lags on the economic system by employing Routh-Hurwitz criterion, stability switch theorem, Hopf bifurcation theory and so on.

On the basis of "geometric stability switches criteria" with respect to the time delay, a new stabilization criterion "stability switches point method" is established, the region for the changes of parameters of asymptotically stable of equilibrium can be obtained by using the method.

Please input text in the center grasp high speed whirling circular saw at cutting the work piece, it is very important to keep cutting stability well.

The on line monitoring problem of cutting stability is discussed emphatically,the characteristic coefficient R=N(0)/L(0)is presented as the monitoring parameter of cutting stability according to the varying characteristic of vibration signal in time domain before and after destabilization the losing stability.

Study on the shear stability of linked polymer solution;

Analysis of the shear stability of aerobic sludge flocs and anaerobic sludge granules

The application results showed that the VII T613 possesses excellent thickening ability,shear stability,thermal oxidation stability and the sensitivity to pour point depressor,coming up to the internal advanced level in performance.

The evaluation showed that PRCD-1 was better than HPAM in resistance to heat,resistance to salt and resistance to shear.