In addition, unlike that in the forward calculation, the diffusion term in the backward calculation is prone to accumulate errors, thus renders the whole scheme unstable.
此外与顺时计算不同，扩散项在反向计算时更容易积累误差，从而使计算格式趋于不稳。
The scheme provides group key secrecy, forward secrecy and backward secrecy.
它提供的安全属性包括群组密钥保密性、前向保密和后向保密。
An improved forward-backward time integration scheme is proposed for keeping the computational stability.
为了保持计算稳定性，提出了一种改进的向前向后时间积分方法。
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