趋势项 meaning in English
trend term
Examples
- Bayesian estimation of time series model with trend
时间序列趋势项的贝叶斯估计 - Firstly , utilizing grey - separate model makes time - series take speadily , that is to say , use the grey model to prune the trend one x ( t ) ; and the array got is a steady time array y ( t ) ; secondly , using arima models y ( t ) ; lastly , we get combined predication model of w ( t )
首先利用灰色分离模型法使时间序列平稳化，即利用灰色模型削去趋势项x （ t厂得到的序列既是平稳时间序列y （ t广然后利用aaima模型法对y （ t ）建模，最后得到原始数列叫t ）的组合预测模型。 - Seasonal dynamic model is introduced to analyze and evaluate tianjin raw water quality of luanhe river during 10 years for the first time , and so does for huanghe river during 4 years . based on these historical data , some long - term trend function of water quality items is got , by which seasonal fluctuation rate ( s c ) and seasonal dynamic trend of water quality items are computed . for the first time , clustering analysis is introduced to divide tianjin raw water into different levels
首次采用季节变动模型对天津市滦河水源10年的水质情况和黄河水源4年的水质情况进行了分析评价,得出各个水质指标的长期趋势项回归方程,根据趋势模型和各水质指标的历史数据求出季节比sc ,在各个指标的季节平均值和对应的季节比( sc )的基础上,得到了各个水质指标的季节变化趋势值。 - A batch least - squares maximum likelihood estimator is employed to calibrate the model coefficients of accelerometer and a polynomial post - fit method is used to establish temperature models of these coefficients . the temperature models of accelerometer bias and scale factor of accelerometer are established between - 20oc and 50 oc . after compensating the temperature error by using these models , the post - fit residuals of the accelerometer output have been improved to 10 ? 5 g , and the trend term of accelerometer changing with temperature basically vanished
采用最小二乘极大似然估计和多项式拟合的方法,分析加速度计静态模型系数随加速度计壳体温度变化的规律,建立了- 20oc 50oc之间加速度计零偏和标度因数误差的温度模型,应用该模型对加速度计温度干扰进行补偿,补偿后,加速度计输出的拟合均方根误差一到二个数量级,并且基本上消除了加速度计输出随温度变化的趋势项,使得加速度计测量精度得到了明显提高。 - As the time trend function represent the impact of economic development on consumption , in the paper the semi - parametric model with deterministic time trend function is firstly used to make empirical study for cointegration test between actual consume and income per capita of chinese urban residents from 1978 to 2005 , and the results show that there do exists cointegration between consume and income with income having important effects on consume , while the time trend form is not as what we usually suppose
摘要由于确定性时间趋势项代表了经济发展等的因素对消费的影响，故本文首次基于带有非参数时间趋势项的半参数模型对我国1978 ~ 2005年的消费收入进行了协整检验，实证结果表明：转轨时期我国城镇居民人均收入与消费之间存在着长期均衡关系，收入是消费的一个重要决定因素；同时趋势项的影响也并不是如很多文章描述的那样具有直线形式。