And these changes will affect the stress and strain of the structure , then the deflection . the deflection upwards exceeding reasonable value will bring difficulty for high speed running and increase the impact effect , causing the intensive shake of the bridge 混凝土的收缩徐变变形及预应力钢束的松弛是与时间有关的变形性质，它们随时间的变化会引起结构中应力应变的变化，进而导致结构的挠度变化。
In the de - noise part , the author firstly proved that the snr of the live image can be improved by integrating several images . because the subtraction images are image sequences , which related to time , so in the arithmetic realization , different images are integrated after assigning different weight that is convenient for optimization 在降噪的处理过程中首先从理论分析中证明了通过积分累加可以使得造影图象的信噪比获得提高，在实现中考虑到数字剪影图象是与时间有关的序列，因此采用利于优化的多权重积分累加，提高了运算效率。
Moreover , considering that the proportional coefficients at which interest rates change with the amount of circulating fund depend on time , the non - autonomous interest rate - amount of circulating fund equatoin is constructed and an elaborate study is made of the nature of its solution in normal cases and in the cases of impulse disturbance 另外，考虑到利率随流通量变化的比例系数通常与时间有关，因此，本章又建立了非自治利率流通量方程，并对其解的性质在常规情形以及有脉冲扰动的情形都做出了详细的研究。
The difference between these two algorithms is that the former uses sub - domain as the basic unit of task to be allocated and the latter uses the node - super - row as the basic unit of task . ( 6 ) the original problem is transformed into transformed domain by using laplace transform method . by the parallelization of the bem in the transformed domain , the parallelization of the elasto - dynamic be analysis is implemented by introducing the time related fimdamental solution , the time dependency is released from the formation of time - domain be equations ( 6 )通过拉氏积分变换法将弹性动力问题转换至变换域，通过变换域上边界元的分布并行处理实现了弹性动力边界元分析的并行化；引入与时间有关的基本解，解除了时域边界元系统方程组形成阶段的时间顺序依赖性，通过矩阵向量运算的分布并行处理实现方程组时间步进求解方法的并行化，这种方法是一种部分时间并行算法。
