Acute kidney injury remains a serious condition with a high mortality risk. In the absence of any new drugs, renal replacement therapy (RRT) is the most important treatment option. Randomized controlled trials have co...Acute kidney injury remains a serious condition with a high mortality risk. In the absence of any new drugs, renal replacement therapy (RRT) is the most important treatment option. Randomized controlled trials have concluded that in critically ill patients without an emergency indication for RRT, a watchful waiting strategy is safe;however, further delays in RRT did not seem to confer any benefit, rather was associated with potential harm. During this process, balancing the risks of complications due to an unnecessary intervention with the risk of not correcting a potentially life-threatening complication remains a challenge. Dynamic renal function assessment, especially dynamic assessment of renal demand-capacity matching, combined with renal biomarkers such as neutrophil gelatinase-associated lipocalin and furosemide stress test, is helpful to identify which patients and when the patients may benefit from RRT.展开更多
为了探究可变气门正时对低速发动机动力性能的影响。首先对发动机凸轮轴相位可变进行需求分析,然后根据理论分析为某一无VVT配气功能的汽油机设计一套VVT系统,最后在发动机台架上分别对原发动机和VVT发动机进行低速时发动机功率、扭矩...为了探究可变气门正时对低速发动机动力性能的影响。首先对发动机凸轮轴相位可变进行需求分析,然后根据理论分析为某一无VVT配气功能的汽油机设计一套VVT系统,最后在发动机台架上分别对原发动机和VVT发动机进行低速时发动机功率、扭矩和转速性能进行试验。结果表明,VVT发动机与原发动机相比较扭矩提高了2 N·m,功率提高了2.5 k W,转速降低82 r/min,从而得出可变气门正时低速发动机动力性能有了显著的提高。展开更多
文摘Acute kidney injury remains a serious condition with a high mortality risk. In the absence of any new drugs, renal replacement therapy (RRT) is the most important treatment option. Randomized controlled trials have concluded that in critically ill patients without an emergency indication for RRT, a watchful waiting strategy is safe;however, further delays in RRT did not seem to confer any benefit, rather was associated with potential harm. During this process, balancing the risks of complications due to an unnecessary intervention with the risk of not correcting a potentially life-threatening complication remains a challenge. Dynamic renal function assessment, especially dynamic assessment of renal demand-capacity matching, combined with renal biomarkers such as neutrophil gelatinase-associated lipocalin and furosemide stress test, is helpful to identify which patients and when the patients may benefit from RRT.
文摘为了探究可变气门正时对低速发动机动力性能的影响。首先对发动机凸轮轴相位可变进行需求分析,然后根据理论分析为某一无VVT配气功能的汽油机设计一套VVT系统,最后在发动机台架上分别对原发动机和VVT发动机进行低速时发动机功率、扭矩和转速性能进行试验。结果表明,VVT发动机与原发动机相比较扭矩提高了2 N·m,功率提高了2.5 k W,转速降低82 r/min,从而得出可变气门正时低速发动机动力性能有了显著的提高。
