Conclusion Combination use of two drugs can decrease pre load and post load of heart, increase cardial minute ouput, improve the heart function.
结论两种药物联用降低心脏前负荷、后负荷，增加心脏每分输出量，改善心肺功能。
Present a time-varying parametric model that is LPTV type, and study the relationship between model parametrics and cyclostatistics of its ouput signal. ?
给出了循环平稳随机信号的LPTV时变参数信号模型及该模型参数与信号循环统计量之间的关系。
This paper calculates, analyses and determines the pressure point of maximum of ouput power and saving-energy efficiency of differential pressure and Limited pressure variable displacement pump.
本文计算、分析、确定了限压式变量系和差压式变量泵输出功率最大值和节能效率最大值的压力点；
This paper calculates, analyses and determines the pressure point of maximum of ouput power and saving-energy efficiency of differential pressure and Limited pressure variable displacement pump.
本文计算、分析、确定了限压式变量系和差压式变量泵输出功率最大值和节能效率最大值的压力点；
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