In this study, discrete element method （DEM） was employed to simulate the movement of non-cohesive mono-dispersed particles in a V-blender along with particle-particle and particle-boundary interactions. To validate...In this study, discrete element method （DEM） was employed to simulate the movement of non-cohesive mono-dispersed particles in a V-blender along with particle-particle and particle-boundary interactions. To validate the model, DEM results were successfully compared to positron emission particle tracking （PEPT） data reported in literature. The validated model was then utilized to explore the effects of rotational speed and fill level on circulation intensity and axial dispersion coefficient of non-cohesive particles in the V-blender. The results showed that the circulation intensity increased with an increase in the rotational speed from 15 to 60 rpm. As the fill level increased from 20% to 46%, the circulation intensity decreased, reached its minimum value at a fill level of 34% for all rotational speeds, and did not change significantly at fill levels greater than 34%. The DEM results also revealed that the axial dispersion coefficient of particles in the V-blender was a linear function of the rotational speed. These trends were in good agreement with the experimentallv determined values reported bv previous researchers.展开更多
Objective: To observe the effect of acute lung injury after abdominal surgical operations treated with herbs activating blood circulation and dispersing stasis. Methods: Forty-four patients complication with acute lu...Objective: To observe the effect of acute lung injury after abdominal surgical operations treated with herbs activating blood circulation and dispersing stasis. Methods: Forty-four patients complication with acute lung injury after abdominal operation were analyze with multiple clinical and laboratory parameters and were treated early with herbs activating blood circulation and dispersing stasis. Results: After 2 days of medication,arterial oxygen saturation (SaO2 ) and partial pressure of oxygen in artery (PaO2 ) markedly improved, with significant difference as compared with those before medication (P < 0. 01 ). After continous medication for 4 days, SaO2, PaO2 and chest X-ray as well as synthetic physiologic parameters obviously improved, prostaglandin F1a,thromboxane B2 (TXB2 ), C-reactive protein (CRP), erythrocyte C3b were very significantly different from those medication (P < 0. 01 ), the synthetic physiological parameters returned generally to normal. After 5 days of herbal medication, all parameters resumed normal with satisfactory physiologic criteria. Conclusions: Early application of herbs activating blood circulation and dispersing stasis could obviously improve hypoxemia and the lung lesions, and consequently the general condition of the patient.展开更多
基金The financial support from the Natural Sciences and Engineering Research Council of Canada(NSERC)
文摘In this study, discrete element method （DEM） was employed to simulate the movement of non-cohesive mono-dispersed particles in a V-blender along with particle-particle and particle-boundary interactions. To validate the model, DEM results were successfully compared to positron emission particle tracking （PEPT） data reported in literature. The validated model was then utilized to explore the effects of rotational speed and fill level on circulation intensity and axial dispersion coefficient of non-cohesive particles in the V-blender. The results showed that the circulation intensity increased with an increase in the rotational speed from 15 to 60 rpm. As the fill level increased from 20% to 46%, the circulation intensity decreased, reached its minimum value at a fill level of 34% for all rotational speeds, and did not change significantly at fill levels greater than 34%. The DEM results also revealed that the axial dispersion coefficient of particles in the V-blender was a linear function of the rotational speed. These trends were in good agreement with the experimentallv determined values reported bv previous researchers.
文摘Objective: To observe the effect of acute lung injury after abdominal surgical operations treated with herbs activating blood circulation and dispersing stasis. Methods: Forty-four patients complication with acute lung injury after abdominal operation were analyze with multiple clinical and laboratory parameters and were treated early with herbs activating blood circulation and dispersing stasis. Results: After 2 days of medication,arterial oxygen saturation (SaO2 ) and partial pressure of oxygen in artery (PaO2 ) markedly improved, with significant difference as compared with those before medication (P < 0. 01 ). After continous medication for 4 days, SaO2, PaO2 and chest X-ray as well as synthetic physiologic parameters obviously improved, prostaglandin F1a,thromboxane B2 (TXB2 ), C-reactive protein (CRP), erythrocyte C3b were very significantly different from those medication (P < 0. 01 ), the synthetic physiological parameters returned generally to normal. After 5 days of herbal medication, all parameters resumed normal with satisfactory physiologic criteria. Conclusions: Early application of herbs activating blood circulation and dispersing stasis could obviously improve hypoxemia and the lung lesions, and consequently the general condition of the patient.
