at one time 和 at a time 有... ... time of (one's) life非常愉快的经历： time on (one's) hands无事可做的间隙 time was曾有一个时候 ...
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basis time-varying function 基时间函数
Time-varying Stochastic Frontier Production Function 时变随机前沿生产函数
time varying basis function 基时间函数
The ground motion time function is a kind of time serial signals, which is a highly varying and nonstationary randow procedure and fit for wavelet analysis.
地震动是由于地震引起的地面运动，其时间历程函数表现为具有突变特征的非平稳随机过程，因此更适于利用小波变换进行频谱分析。
By studying the regulation of the target bearings varying with time, a concise linear measurable function of bearing varying with time is given.
通过对等速直航目标的方位随时间变化规律的研究，找到了一个形式简洁的方位随时间线性变化的可量测函数。
Radial Gaussian function networks based on fuzzy systems is applied to the state estimation of nonlinear time varying systems.
利用模糊系统的径向高斯函数网络对一类非线性时变系统的状态进行了估计。
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