这种组合预测方法根据以往的全部历史数据，利用数值计算的手段决定组合系数函数中的参数，于是组合系数随时间的推移而变化。
Using all the historical data, this method can decide the parameters of the combinational coefficient function, so that the combinational coefficient varies as the time goes.
分析了拐角频率和应力降随时间的变化趋势，并讨论了震源参数相互之间的关系。
The variation of corner frequency and stress drop with time are analyzed, and the relations between focal parameters are discussed.
对于球形密闭容器内气云的爆炸过程，压力、速度、密度、温度、浓度等流场参数均随时间、空间而发生变化。
For explosion process of gas cloud in closed vessels, flow field parameters, such as pressure, velocity, density, temperature, concentration and so on, vary with time and space.
NACA0012和PROF叶栅在不同折合频率下气动参数随时间的变化表明，折合频率是影响叶栅颤振的重要因素。
The variation of aerodynamic parameters of cascade NACA0012 and PROF under different reduced frequency shows that the reduced frequency is an important factor that influences the flutter.
分析瞬态温度场分布随时间变化的关系，讨论了激光辐照对探测器性能参数的影响。
We analyzed the variation of temperature with time, and construe the effects on parameter of detectors irradiated by laser.
由于岩体具有不均匀性、不连续性和随时间变化的特性，目前在层状岩体边坡工程的岩体力学参数选取方面仍然存在一些问题。
Because rock mass possesses heterogeneity, discontinuity and rheology property, there exists some problems on the choice of rock mass mechanical parameter of layer rock mass slope engineering.
地波传播受天气的影响较小，比较稳定，信道参数基本上不随时间的变化而变化，是恒参信道。
The transmission of the earth wave is stable, hardly influenced by climate and its channel parameter does not change with time basically, it is Constant Parameter Channel.
动态模型的统计参数是随时间变化的时变参数，参数的变化反映了大坝的渗流变化趋势。
Parameters of the dynamic statistical model are the time-varying parameters, variation of parameter reflects the variable trend of seepage.
本文针对风冷热泵冷热水机组的逆循环除霜进行了实验研究，得到了除霜时系统参数随时间的变化规律。
This paper presents an experimental investigation of refrigeration system dynamics during the reverse-cycle defrost of an air-source heat pump chiller.
文章指出，与地震构造活化有关的地热场参数随时间变化的特征确实存在。
The paper points out that there really exist characteristics of temporal variation in the parameters of terrestrial heat fields, which are related to seismic structural activation.
实际上，这些模型的参数经常随时间在一个很大的范围里变化，本文提出两种在线参数估值的方法。
In practice, the parameters of these models may change with time over a wide range. Two on-line parameter estimation methods are discussed in this paper.
裂缝导流能力随时间及空间的变化会对近裂缝储层物性参数分布及压后产能产生显著影响；
The conductivity varying with time and space has a noticeable influence on the deliverability and the distribution of physical parameters near the fracture.
许多实际系统动力学特性中的参数随时间变化，这要求辨识方法具有跟踪能力，能够估计时变参数。
The parameters in dynamics of many real systems are time-dependent, which requires that identification techniques are of the ability of tracking, and can estimate time-varying parameters.
最后利用微元法得到了射流流量随时间变化的函数关系式，并和数值模拟值进行了对比，分析了各设计参数的影响。
For the end, an equation of mass flux of jet about time deduced by the differential element method was compared to CFD results, and the influence of design parameters was analyzed.
利用本文提出的动态模型变参数数学模型，在国际上首次对燃料电池起动过程进行了动态模拟，揭示了燃料电池热态起动过程中，电池温度在三维空间上随时间的变化规律。
The three dimensional variation rule of the temperature of the cell with the time is presented during the process of the startup. A MCFC-ST combined generation system is presented and designed.
结果表明：光场的两正交分量的涨落均可压缩，压缩程度受系统参数的影响，并且随时间呈周期性变化；
The results indicated that one of the two quadrature components of light field evolves periodically with time and can be squeezed, and the system parameters influence the squeezing depth;
这种方法可直接获得向径、轨道速度等参数随时间或极角（绕地心的转动角）的变化，便于分析轨道转移与逃逸运动，有助于飞行使命与运动轨迹的设计。
Radius and orbital velocities can be directly expressed as functions of time or polar angle, which is helpful for designing flight mission and motion trajectory.
这种方法可直接获得向径、轨道速度等参数随时间或极角（绕地心的转动角）的变化，便于分析轨道转移与逃逸运动，有助于飞行使命与运动轨迹的设计。
Radius and orbital velocities can be directly expressed as functions of time or polar angle, which is helpful for designing flight mission and motion trajectory.
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