In this thesis , the research and development status of nickel metal hydride batteries have been reviewed . based on the result mentioned above , the effects of ptfe content , cut - off voltage and charge time at activation , the different concentration of koh or lioh or xaoh in alkaline electrolyte on the key characteristics are studied 本文先对镍氢电池各工作部分的研究情况进行了综述，并在此基础上，研究了ptfe乳液用量，化成时截止电压以及充电时间，碱液中改变koh 、 lioh 、 naoh浓度对电池各项性能的影响。
The author considered great numbers of transmission characteristics of real channel in lms model and properly simplified it according to requirement in the project . the key characteristics in the model include multi - path fading , shadow fading , doppler shift , propagation noise , multi - path delay and and state transform of three status homogeneous markov chain described by lms model , etc . the key characteristics of channel are properly collocated and made to be the evidence theory of hardware implementation Lms模型考虑了大量的实际信道传输特性,结合课题需求,实现过程中对lms模型做了适当简化,考虑了其中的多径和阴影衰落、多普勒频移、传播噪声、多径延迟以及lms模型所描述的三状态齐次markov链的状态转换等,对其所描述的主要信道特性适当组合,以此作为硬件实现时的理论依据。
In the third chapter , 4 main categories of in - vehicle network are further discussed . key characteristics and special requirements on communication of each network is analyzed , then the most important standard of that category of network is introduced to explain how they adapts the specific category of network and how they satisfy the specific communication requirements . comparison among the standards of the same category is conducted 第三章重点讨论了4种类型的汽车电子系统网络，对于每种类型的网络，都首先分析了其主要特点及其对通讯的特殊要求，然后针对如何适应该类网络的特点以及满足其通讯的特殊要求，介绍了该类网络最为重要的技术标准，最后将同类型的技术标准进行比较并分析了所建议采用的技术标准的优势。
