Coating slurries for making anodes and cathodes of lithium batteries contain a large percentage of solid particles of different chemicals, sizes and shapes in highly viscous media. A thorough mixing of these slurries ...Coating slurries for making anodes and cathodes of lithium batteries contain a large percentage of solid particles of different chemicals, sizes and shapes in highly viscous media. A thorough mixing of these slurries poses a major challenge in the battery manufacturing process. Several types of mixing devices and mixing methods were examined. The conventional turbine stirrers or ball mill mixers could be adequately used for the preparation of anode slurries, but not suitable for cathode slurries. In this study, a newly three-dimensional mixer, in conjunction with a multi-stage mixing sequence was proposed. The mixing effectiveness was examined by means of rheological measurements and flow visualization techniques. Preliminary electrical performance results indicated that the battery obtained using the 3D mixing device with a multi-stage mixing sequence was more efficient to those obtained from conventional methods.展开更多
To the Editor:Pre-eclampsia is a leading cause of maternal morbidity and mortality.Although the etiology and progression of pre-eclampsia are not fully understood,it has been demonstrated that delivery is the definiti...To the Editor:Pre-eclampsia is a leading cause of maternal morbidity and mortality.Although the etiology and progression of pre-eclampsia are not fully understood,it has been demonstrated that delivery is the definitive treatment.The clinician is then faced with the decision of when,and how,to proceed with the delivery.According to the guidelines,pre-eclampsia is not an indication of cesarean section,as expected with some serious complications.This means that pregnant women with pre-eclampsia can have a vaginal trial.However,most pregnant women with pre-eclampsia select to have a direct cesarean section at present.Whether having a cesarean section after trialing a vaginal delivery affects the outcomes of mother and child,and its related risk factors,are still unclear.The purpose of this study was to investigate the risk factors and maternal-neonatal outcomes in severe pre-eclampsia patients who underwent a transfer-cesarean section during vaginal labor.展开更多
文摘Coating slurries for making anodes and cathodes of lithium batteries contain a large percentage of solid particles of different chemicals, sizes and shapes in highly viscous media. A thorough mixing of these slurries poses a major challenge in the battery manufacturing process. Several types of mixing devices and mixing methods were examined. The conventional turbine stirrers or ball mill mixers could be adequately used for the preparation of anode slurries, but not suitable for cathode slurries. In this study, a newly three-dimensional mixer, in conjunction with a multi-stage mixing sequence was proposed. The mixing effectiveness was examined by means of rheological measurements and flow visualization techniques. Preliminary electrical performance results indicated that the battery obtained using the 3D mixing device with a multi-stage mixing sequence was more efficient to those obtained from conventional methods.
基金supported by grants from the Fujian Medical University(No:2019QH1138)Fujian Science and Technology Project(No:2018Y0005)the Key Clinical Specialty Discipline Construction of Fujian([2015]No.593).
文摘To the Editor:Pre-eclampsia is a leading cause of maternal morbidity and mortality.Although the etiology and progression of pre-eclampsia are not fully understood,it has been demonstrated that delivery is the definitive treatment.The clinician is then faced with the decision of when,and how,to proceed with the delivery.According to the guidelines,pre-eclampsia is not an indication of cesarean section,as expected with some serious complications.This means that pregnant women with pre-eclampsia can have a vaginal trial.However,most pregnant women with pre-eclampsia select to have a direct cesarean section at present.Whether having a cesarean section after trialing a vaginal delivery affects the outcomes of mother and child,and its related risk factors,are still unclear.The purpose of this study was to investigate the risk factors and maternal-neonatal outcomes in severe pre-eclampsia patients who underwent a transfer-cesarean section during vaginal labor.
