To solve the problem of low weak signal enhancement performance in the quad-stable system,a new quad-stable potential stochastic resonance(QSR)is proposed.Firstly,under the condition of adiabatic approximation theory,...To solve the problem of low weak signal enhancement performance in the quad-stable system,a new quad-stable potential stochastic resonance(QSR)is proposed.Firstly,under the condition of adiabatic approximation theory,the stationary probability distribution(SPD),the mean first passage time(MFPT),the work(W),and the power spectrum amplification factor(SAF)are derived,and the impacts of system parameters on them are also extensively analyzed.Secondly,numerical simulations are performed to compare QSR with the classical Tri-stable stochastic resonance(CTSR)by using the genetic algorithm(GA)and the fourth-order Runge–Kutta algorithm.It shows that the signal-to-noise ratio(SNR)and mean signal-to-noise increase(MSNRI)of QSR are higher than CTSR,which indicates that QSR has superior noise immunity than CTSR.Finally,the two systems are applied in the detection of real bearing faults.The experimental results show that QSR is superior to CTSR,which provides a better theoretical significance and reference value for practical engineering application.展开更多
In China, poultry producers have long lived in the shadow of the pork industry, which remains the meat of choice throughout thenation. Whilst this trend is evident in the highly correlated prices between each market, ...In China, poultry producers have long lived in the shadow of the pork industry, which remains the meat of choice throughout thenation. Whilst this trend is evident in the highly correlated prices between each market, a new report from Rabobank suggests that China＇s poultry industry beginning to develop its own growth path. The poultry sector has great growth potential thanks to changing food preferences and growing demand from the ever-increasing quick service restaurants （QSR） sector. To capitalise on this potential, producers must address a number of barriers that constrain the industry at present, namely concerns around food safety and poor farm management.展开更多
基金the National Natural Science Foundation of China(Grant No.61771085)the Research Project of Chongqing Educational Commission(Grant Nos.KJ1600407 and KJQN201900601)。
文摘To solve the problem of low weak signal enhancement performance in the quad-stable system,a new quad-stable potential stochastic resonance(QSR)is proposed.Firstly,under the condition of adiabatic approximation theory,the stationary probability distribution(SPD),the mean first passage time(MFPT),the work(W),and the power spectrum amplification factor(SAF)are derived,and the impacts of system parameters on them are also extensively analyzed.Secondly,numerical simulations are performed to compare QSR with the classical Tri-stable stochastic resonance(CTSR)by using the genetic algorithm(GA)and the fourth-order Runge–Kutta algorithm.It shows that the signal-to-noise ratio(SNR)and mean signal-to-noise increase(MSNRI)of QSR are higher than CTSR,which indicates that QSR has superior noise immunity than CTSR.Finally,the two systems are applied in the detection of real bearing faults.The experimental results show that QSR is superior to CTSR,which provides a better theoretical significance and reference value for practical engineering application.
文摘In China, poultry producers have long lived in the shadow of the pork industry, which remains the meat of choice throughout thenation. Whilst this trend is evident in the highly correlated prices between each market, a new report from Rabobank suggests that China＇s poultry industry beginning to develop its own growth path. The poultry sector has great growth potential thanks to changing food preferences and growing demand from the ever-increasing quick service restaurants （QSR） sector. To capitalise on this potential, producers must address a number of barriers that constrain the industry at present, namely concerns around food safety and poor farm management.
