A fault diagnosis method of bearing based on integration of non-linear geometric invariables was presented for the non-linearity exiting in bearing system but ignored in traditional fault diagnosis.The meanings of non...A fault diagnosis method of bearing based on integration of non-linear geometric invariables was presented for the non-linearity exiting in bearing system but ignored in traditional fault diagnosis.The meanings of non-linear geometric invariables,such as fractal dimension,Lyapunov exponent,Kolmogorov entropy,correlation distance entropy and their calculation method were analyzed.Grey theory is applied to integrate these parameters and the correlation values as fault characteristic value was input into the support vector machines for diagnosis.The experimental results show that this method can distinguish the bearing fault effectively,it provides a new approach for the fault diagnosis of rotating machinery.展开更多
Objective： To explore effective modelity for slow transit constipation （STC） and provide evidence for standardization of pattern identification of STC. Methods： Sixty eight cases of STC patients were randomly and ...Objective： To explore effective modelity for slow transit constipation （STC） and provide evidence for standardization of pattern identification of STC. Methods： Sixty eight cases of STC patients were randomly and evenly assigned into acupuncture group （n=34） and medication （control） group （n=34）. In acupuncture group, Tianshu （天枢 ST 25） and Zhigou （支沟 TE 6） were punctured and stimulated electrically by setting the parameters of 1 Hz, continuous waves, suitable strength and duration of 30 min. Patients of the control group were ordered to take Tongbionling （bowel-movernent promotion） Capsule, 5 cap sules/time, once daily. Results： After 28 days＇ treatment, symptom scores in both groups were decreased significantly and colonic ejection rates within 72 hours increased considerably in comparison with pre-treatment （ P〈 0, 01 ） ; and the therapeutic effects of acupuncture group were remarkably better than those of control group in lowering symptom score and raising colonic ejection rate （P〈0.01）. Conclusion： Acupuncture is a simple and practical method for the treatment of STC and its therapeutic effect is reliable.展开更多
文摘A fault diagnosis method of bearing based on integration of non-linear geometric invariables was presented for the non-linearity exiting in bearing system but ignored in traditional fault diagnosis.The meanings of non-linear geometric invariables,such as fractal dimension,Lyapunov exponent,Kolmogorov entropy,correlation distance entropy and their calculation method were analyzed.Grey theory is applied to integrate these parameters and the correlation values as fault characteristic value was input into the support vector machines for diagnosis.The experimental results show that this method can distinguish the bearing fault effectively,it provides a new approach for the fault diagnosis of rotating machinery.
文摘Objective： To explore effective modelity for slow transit constipation （STC） and provide evidence for standardization of pattern identification of STC. Methods： Sixty eight cases of STC patients were randomly and evenly assigned into acupuncture group （n=34） and medication （control） group （n=34）. In acupuncture group, Tianshu （天枢 ST 25） and Zhigou （支沟 TE 6） were punctured and stimulated electrically by setting the parameters of 1 Hz, continuous waves, suitable strength and duration of 30 min. Patients of the control group were ordered to take Tongbionling （bowel-movernent promotion） Capsule, 5 cap sules/time, once daily. Results： After 28 days＇ treatment, symptom scores in both groups were decreased significantly and colonic ejection rates within 72 hours increased considerably in comparison with pre-treatment （ P〈 0, 01 ） ; and the therapeutic effects of acupuncture group were remarkably better than those of control group in lowering symptom score and raising colonic ejection rate （P〈0.01）. Conclusion： Acupuncture is a simple and practical method for the treatment of STC and its therapeutic effect is reliable.
