在充电式混合动力电动汽车(plug-in hybrid electric vehicle,PHEV)和电动汽车(electric vehicle,EV)中,对电池进行精确、可靠的荷电状态估计(state of charge,SOC)非常重要。传统估计方法存在计算量大、估计不精确等缺点,提出一种平方...在充电式混合动力电动汽车(plug-in hybrid electric vehicle,PHEV)和电动汽车(electric vehicle,EV)中,对电池进行精确、可靠的荷电状态估计(state of charge,SOC)非常重要。传统估计方法存在计算量大、估计不精确等缺点,提出一种平方根无迹卡尔曼滤波(square root unscented Kalman filter,SRUKF)算法对SOC进行实时估计及更新。利用无迹变换(unscented transformation,UT)精确估计系统方程的均值和协方差,使估算值达到二阶精度。利用平方根算法保证状态协方差的半正定性,提高数字计算的稳定性。通过实验对比,验证了该算法的有效性。结果表明,该方法可使状态估计值具有较小的误差和快速跟随性,满足了SOC估计的实际需求。展开更多
A cryptosystem based on computation of square roots of complex integers modulo composite n is described in this paper. This paper provides an algorithm extracting a square root of Gaussian integer. Various properties ...A cryptosystem based on computation of square roots of complex integers modulo composite n is described in this paper. This paper provides an algorithm extracting a square root of Gaussian integer. Various properties of square roots and a method for finding Gaussian generators are demonstrated. The generators can be instrumental in constructing other cryptosystems. It is shown how to significantly reduce average complexity of decryption per each block of ciphertext.展开更多
文摘A cryptosystem based on computation of square roots of complex integers modulo composite n is described in this paper. This paper provides an algorithm extracting a square root of Gaussian integer. Various properties of square roots and a method for finding Gaussian generators are demonstrated. The generators can be instrumental in constructing other cryptosystems. It is shown how to significantly reduce average complexity of decryption per each block of ciphertext.
