混联电路的简化技巧

对电路中的第一个节点标上序号,即第一个电阻的两端都标有序号,然后根据各电阻两端的序号找到它们各自相应的位置。当所有的电阻按序号重新排列组合后,各电阻的串联关系就清楚呈现在新的电路图上。     

Poisson型元件串并联系统和并串联系统的可靠性置信下限

运用Poisson分布的累积函数与不完全伽玛函数之间的关系,给出了Poisson型元件组成的串并联系统和并串联系统的可靠性表达式,然后根据Poisson型元件的样本数据求出未知参数的Fiducial分布,进而得到这两种系统可靠性Fiducial置信下限的计算公式,最后通过数值模拟验证了结论．     

Configuration design, energy management and experimental validation of a novel series-parallel hybrid electric transit bus

This paper aims to present the configuration design approach and the energy management strategy （EMS） of a series-parallel hybrid electric transit bus （SPHEB） jointly developed by Shanghai Automotive Industry Co. Ltd. （SAIC） and Shanghai Jiao Tong University （SJTU）, China. A major feature of this SPHEB is that a novel manual transmission is designed to switch the powertrain configuration between series and parallel types. To reduce the fuel consumption as well as sustain the battery state of charge, an EMS including seven energy flow modes is designed and applied to this SPHEB. Governed by this EMS, the engine is maintained to operate in high efficiency regions. The experimental test carded on the transit bus city driving cycle is described and analyzed. The experimental results demonstrate the technical feasibility and fuel economy of this approach.