针对双电机驱动的纯电动客车转矩分配问题,采用模拟退火和粒子群的混合优化算法以寻求转矩分配后整车能耗最小的方案。通过对双电机客车整车结构和性能参数的分析,确定了计算整车能耗的数学模型,在满足整车需求转矩的前提下,根据电机转...针对双电机驱动的纯电动客车转矩分配问题,采用模拟退火和粒子群的混合优化算法以寻求转矩分配后整车能耗最小的方案。通过对双电机客车整车结构和性能参数的分析,确定了计算整车能耗的数学模型,在满足整车需求转矩的前提下,根据电机转速和效率特性并引入模拟退火和带压缩因子的粒子群算法相结合的优化算法对双电机需求转矩进行分配。对该方法进行了中国典型城市公交循环(China city bus cycle,CCBC)工况的仿真和台架试验,结果表明:该算法实现了对电动客车双电机系统转矩的优化分配,整车在1个循环工况下的能耗降低了3.2%。展开更多
Orthomorphism on F2^n is a kind of elementary pemmtation with good cryptographic properties. This paper proposes a hybrid strategy of Particle Swarm Optimization （PSO） and Sirrmlated Annealing （SA） for finding ort...Orthomorphism on F2^n is a kind of elementary pemmtation with good cryptographic properties. This paper proposes a hybrid strategy of Particle Swarm Optimization （PSO） and Sirrmlated Annealing （SA） for finding orthomorphisrm with good cryptographic properties. By experiment based on this strategy, we get some orthorrorphisrm on F2^n = 5, 6, 7, 9, 10） with good cryptographic properties in the open document for the first time, and the optirml orthorrrphism on F found in this paper also does better than the one proposed by Feng Dengguo et al. in stream cipher Loiss in difference uniformity, algebraic degree, algebraic irrarnity and corresponding pernmtation polynomial degree. The PSOSA hybrid strategy for optimizing orthomerphism in this paper makes design of orthorrorphisrm with good cryptographic properties automated, efficient and convenient, which proposes a new approach to design orthornorphisrm.展开更多
文摘针对双电机驱动的纯电动客车转矩分配问题,采用模拟退火和粒子群的混合优化算法以寻求转矩分配后整车能耗最小的方案。通过对双电机客车整车结构和性能参数的分析,确定了计算整车能耗的数学模型,在满足整车需求转矩的前提下,根据电机转速和效率特性并引入模拟退火和带压缩因子的粒子群算法相结合的优化算法对双电机需求转矩进行分配。对该方法进行了中国典型城市公交循环(China city bus cycle,CCBC)工况的仿真和台架试验,结果表明:该算法实现了对电动客车双电机系统转矩的优化分配,整车在1个循环工况下的能耗降低了3.2%。
基金supported by the National Natural Science Foundation of China under Grants No.60673071,No.60970115,No.60970116,No.61003267partially supported by the National Hi-Tech Research and Department Program of China under Grants No.2006AA01Z442,No.2007AA01Z411
文摘Orthomorphism on F2^n is a kind of elementary pemmtation with good cryptographic properties. This paper proposes a hybrid strategy of Particle Swarm Optimization （PSO） and Sirrmlated Annealing （SA） for finding orthomorphisrm with good cryptographic properties. By experiment based on this strategy, we get some orthorrorphisrm on F2^n = 5, 6, 7, 9, 10） with good cryptographic properties in the open document for the first time, and the optirml orthorrrphism on F found in this paper also does better than the one proposed by Feng Dengguo et al. in stream cipher Loiss in difference uniformity, algebraic degree, algebraic irrarnity and corresponding pernmtation polynomial degree. The PSOSA hybrid strategy for optimizing orthomerphism in this paper makes design of orthorrorphisrm with good cryptographic properties automated, efficient and convenient, which proposes a new approach to design orthornorphisrm.
