The combination of these factors influences the amount of load the system can handle, which may vary from time to time.

这些因素的组合影响系统可以处理的负载的数量，这个数量每次都是不同的。

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If one or more parameters, or the very form of an elemental equation, vary in a known fashion with time, the system is said to be time-varying.

如果有一个或多个参数，甚至连基础方程本身都以一种已知方式随时间而变化，则此系统就称为时变系统。

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The result shows that, compared with the existing channel estimation algorithms for OFDM system under time-vary multipath channel, the proposed algorithm can effectively reduce estimation errors.

分析结果表明，与已有的OFDM系统在时变多径信道中的信道估计技术相比，所建议的算法可以有效地减小信道估计的误差。

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