数字信号处理的 FPGA 实现 - 货比三家 加法器 2．4 二进制乘法器 2．5 乘-累加器(Multiply·Accumulator，MAC)与乘积之和(Sum of Product，SOP) 2．5．1 分布式算法基础 2．5．2 有符号的DA数制 2．5．3 改进的DA解决方案 2．6
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其计算方法为各类资本成本与其在总资本中所占比重的乘积之和。
It equals to the sum up of cost of each capital multiplying its weighted ratio in the total assets.
定义了宏观车辆折算系数：组成混合交通流的所有自然车的微观折算系数与组成比例的乘积之和。
The macro passenger car equivalent is equal to the sum of products of the micro passenger car equivalent by the percentage of the mixed traffic flow.
两个辛矩阵之和不能保辛，两个辛矩阵的乘积仍是辛矩阵。
The sum of two symplectic matrixes is not symplectic conservation. The product of two symplectic matrixes is symplectic conservation.
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