time-varying coefficient

A Time-varying Coefficient Dynamic Input-output Model Based on Cobb-Douglas Function

基于C－D函数的变系数动态投入产出模型

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Due to the time-varying beamforming coefficient breaks the correlation of target and sea-clutter in the whole coherent process interval ( CPI), the Bragg peaks will spread after the Doppler processing.

时变的波束形成系数破坏了积累周期中海面动目标和海杂波的相关性，多普勒处理后Bragg峰扩散引起基底抬高。

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The proposed algorithms result in mapping relations of their z-transfer functions between non-multirate and multirate mathematical expressions in terms of time-varying coefficient instead of traditional polyphase decomposition counterparts.

从用时变系数代替传统的多相位分解方法的角度来说，该算法得出了非多速率与多速率数学表达式之间的以z传递函数表示的相互映射关系。

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Inputting high-frequency and single pulse signal into coaxial line, the time delay and distortion caused by dispersion can be recorded and measured by digital oscilloscope. The line length and attenuation coefficient are achieved.

将高频单脉冲信号输入同轴电缆，借助数字存储示波器记录输入、输出端的波形和相对延时，可以测量传输线的电缆长度和衰减系数，同时观察脉冲波形因色散引起的畸变。

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This paper realized these two use, and conclusions could got by analyzing the time deviation, frequency deviation, frequency drift, Allan deviation and the noise coefficient. All these conclusions have proved that Kalman algorithm can achieve better results in these two ways.

论文实现了这两类运用，通过对滤波后时差、频差、频漂、Allan偏差以及噪声系数的分析，得出结论，证明Kalman滤波算法在这两类运用中都能取得较理想的结果。

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The frictional coefficient plays important role to the frictional power loss of gears and the time-varying coefficient was analyzed.

在对齿轮啮合过程中摩擦因数分析的基础上，对外啮合齿轮摩擦功耗进行了分析计算。

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The results showed that the change of time-varying parameters ( coefficient) in dynamic AR model has a regularity. Its increments are piled up by some simple period functions.

结果表明，动态自回归模型时变参数（时变系数）的变化是有规律的，其增量大体上是一些简单周期函数的叠加。

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Solving time-varying periodic coefficient Riccati differential equations via Fourier series and precise integration method

基于Fourier级数的时变周期系数Riccati微分方程精细积分

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D-partion of stable range of three neutral time lag differential equation Has been studied and determines the three equation of uniformly asymptotically stable And unstable range in coefficient space.

主要讨论了3类中立型时滞微分方程之稳定区域的D划分法，确定了这3类方程在其系数空间中的一致渐近稳定区域及不稳定区域。

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Zero Solution Stability of the Neutral Time delay System of Constant Coefficient Linearity

常系数线性中立型时滞大系统的零解稳定性

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Because of the meshing stiffness of a gear pair, the governing equation denotes a linear dynamic system with periodic time-varying coefficient.

由于齿轮副啮合刚度的影响，动力学方程式代表了一个具有时变系数的线性动力系统。

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Its equation of attitude motion has the form of first circulating integration and is to be deduced a first-order equation while equations of vibration are linear, time-varying coefficient, two order differential equation.

其姿态运动方程是一次循环积分的形式，成为一次方程，而振动方程则是一组时变系数线性二次微分方程。

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Finally, Bayesian Wishart Autoregressive model is applied for depicting the time-varying correlation coefficient and discussing the volatility spillover effects between the stock market and the precious metal futures market.

最后，利用贝叶斯Wishart自回归模型刻画了贵金属期货市场与股市的时变相关系数，并讨论的市场间的波动溢出效应。

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This method uses wavelet packet decomposing the WVD of the signal and reconstructing the time frequency diagram according to the decomposition coefficient. It can remove cross-term efficiently. Theoretical analysis and experimental results proved the validity of the method.

基于小波包分析，利用小波包对信号的威格纳时频分布进行分解，并利用分解系数重构时频图，使交叉项得到抑制和改善，实验结果表明此方法简单有效。

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The dynamic phasor theory, which is based on time-varying Fourier coefficient series, is applied to modeling and simulation of power electronic devices.

把动态相量理论推广应用到了电力电子装置建模及仿真中。

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Then, based on Lyapunov stability theory and applied the vector comparison theorem, stability for delay time-varying interval coefficient discrete systems is studied and robust stability for delay time-varying discrete linear systems with nonlinear time-varying perturbations is also considered. Some sufficient conditions are obtained.

基于Lyapunov稳定性理论，应用向量比较原理，研究了滞后时变离散区间系统的稳定性，和具有非线性时变摄动的滞后时变离散系统的鲁棒稳定性，得出了一些充分条件。

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We find that using a time-varying correlation coefficient Copula function to calculate optimal hedging ratio can get the hedging portfolio with smaller value of LPM than the traditional methods.

发现使用具有随时间变化的相关系数的Copula函数估计得到的最优套期保值组合比传统的方法估计得到的最优套期保值组合有更小的下偏矩。

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