查询词典 forecasting

Aiming at medium- and long-term load forecasting, the principle of partial least squares regression analysis is presented and the simplified modeling procedures of this algorithm is derived in detail.

针对中长期电力负荷预测，介绍偏最小二乘回归分析方法的原理，推导该算法的简化建模步骤。

Finally, it makes a discussion and draws a conclusion that the multiple regression model which is set up through selecting the complications of influencing gas emission with partial regression square sum parameter is feasible , at the same time, it plays a role in improving the accuracy of fitting prediction ,and it could be better for forecasting and controlling the gas emission in the coal mine.

最后，通过分析，得出结论：采用偏回归平方和参数对该矿瓦斯涌出量影响因素进行优选建立回归模型是可行的，同时有利于提高拟合精度，可以更好地对该矿瓦斯涌出量进行预报与控制。

Water consumption forecasting model is a mathematical representation which is based on the data pattern of urban water consumption series.

用水量预测模型是在分析城市用水量序列数据模式的基础上，综合利用统计回归的方法建立的数学表达式。

By means of PSO and taking the minimum mean absolute percentage error of the forecasting model as objective function, the optimal model parameters are chosen.

通过粒子群优化算法，以模型预测平均绝对百分误差最小为目标，选择最优的模型参数。

The analytical method is always used due to the large amount of the objects and not very high accuracy of forecasting. A method based on the position and velocity derived from the mean orbit elements directly is given, which is to avoid the problem of singularity in calculating the periodic terms of orbit elements variation, thus the process and software can be simplified.

在已有分析法得到t时刻平均根数的基础上给出一种轨道预报方法，由t时刻的平均根数给出该时刻卫星的位置和速度，在此基础上将地球非球形引力摄动的周期项直接用卫星直角坐标的位置和速度分量表示，这样可以避免在计算轨道根数变化的周期项时出现的奇点问题，从而对根数的选择无特殊要求，可适用于各种轨道，简化预报程序和相应的软件，提高预报效率。

It is specially important to find petrology characteristic and the forming and controlling factor of the highly effective sandstone body to provides the basis for forecasting the advantageous reservoir and its distribution.

因此查明该区太原组储层砂岩的岩石学特征以及高效砂体的形成和控制因素，可以为预测有利储层的发育和分布特征提供重要参考依据。

In the procedure of researching and developing project, brings forward the method of fast establishing new project based on template file; develops the module used for forecasting movement and deformation of multiple random-shape faces according to probability integral principle; according to the traits of forecasted data, puts forward a new algorithm of drawing isoclines in Maplnfo environment; designs the new algorithm of drawing section plane and the new calculation of area and volume of subsided section based on isoclines; at the same time, gives the rale of classifying mine surface damage under GIS environment on the basis of GIS uncertainty theory.

在课题的研制过程中，提出了以模板文件形式快速建立新项目的方法；运用概率积分法编写了任意形状多工作面开采沉陷地表移动与变形预计模块；根据预计数据的特点，基于MapInfo设计了等值线新的绘制算法；基于等值线设计了新的剖面图绘制算法和塌陷区面积、体积的计算方法；并结合GIS不确定性理论提出了GIS图形环境下矿区地表塌陷破坏等级划分准则。

The purpose of this thesis is to find a new technological forecasting model based on time-varied capacity and it has a flexible point of inflection.

这篇论文的目的主要是在检测一个拥有可变动上限以及弹性转折点的新模型与其他以广泛应用的科技预测模型之比较。

Topics may include review of classical time series models, forecasting, smoothing, regression methods, polynomial trend models, seasonal models, and forecast monitoring and intervention.

包括传统的时间序列模型，预测，平滑，回归方法，多项式趋势模型，季节模型，预测监控与干预。

Potato late blight ; meteorological condition ; forecasting model

马铃薯晚疫病；气象条件；预测模型

Now he worked in ajoint venture.

现在他在一家合资企业工作。

More troops in Afghanistan won't change any of the foregoing.

更多的在阿富汗的军队也不会改变之前的状况。