查询词典 forecasting

It is necessary to train the already known annual reduction quantity of arable land resources in Shaanxi Province through BP nerve network ＆ to establish a forecasting model for this reduction according to time order.

采用MATLAB软件建立用于预测的BP神经网络，将已知陕西省的耕地资源年减少量通过BP神经网络进行训练，建立陕西年耕地面积减少的时间序列的预测模型。

When forecasting wind speed to wind farm at coast, if there is land sea breeze, we can use the characteristic of wind profile using stastical method to correct the forecasing by model.

并发现即使没有海陆风发生，当风向为海洋吹向陆地时，风速随高度的垂直切变同样小于陆地吹向海洋的时段。

Many researchers have forecasted energy consumption recent years, and different forecasting methods leaded to different results.

近年来许多研究人员在能源消费预测方面进行了很多研究，预测方法不同导致结果不同。

The deviation of forecasting brought by the difference of CCP schemes would not increase lineally with integration forward.

结果表明，模式非绝热物理过程可以从两方面影响暴雨预报的不确定性。

In this paper, two models of online super short-time load forecasting are proposed. One is based on the linear extrapolation, the other on the BP.

基于此，本文提出了在线超短期负荷预测，并建立了两种超短期负荷预测模型：一种是基于线性外推法的超短期负荷预测：一种是基于BP网络的超短期负荷预测。

After a short-term load forecasting method based analogous and linear extrapolation is proposed, the load forecast and the priority of equipment action are led into static reactive power optimization. The aim function is constructed for the practical situation of power system. On the basis of traditional genetic algorithm the fitness function and the holding of population diversity are improved. The adjacent search operator is applied to improve ability of local search.

在提出基于相似日和线性外推的短期负荷预测新方法的基础上，将负荷预测和设备动作优先级引入静态无功优化中，并结合电网实际情况，构造了实用的目标函数，对遗传算法的适应度函数和群体多样性的保持进行了改进，采用邻域搜索算子增加遗传算法的局部寻优能力。

The paper presents a new method for short-term load forecasting, which applies cluster analysis technique of pattern recognition principle to calculate the similar coefficients between the future day and past days, then chooses the most similar days according to these coefficients and uses linear extrapolation method to predict the load of future day.

短期负荷预测是各供电分公司调度部门的基础性工作，96点日负荷预测采用模式识别中的聚类分析方法，对影响负荷的不同相关因素建立历史映射数据库，在不同日之间计算相关度而得到相似日，并在相似日的基础上采用线性外推法得到预测日的对应负荷。

And the reasonable proposal for the construction the region electrical power system was put forwardThe power load forecast is the basis of the power system planning.With the actual planning of regional development,uses a scientific and effective load forecasting methods forecast plans the local load electric quantity,is an important work to the regional power system planning.This dissertation uses the BP algorithm, proposed a double hidden layer structure artificial neural network to the forecast ultra-short-term power system load.After the simulation with the actual data,the method which this dissertation proposed compared to the traditional linear extrapolation Prediction method average absolute percent error of 2.5 percentage points,ten minute load forecasts achieve the average absolute percentage error are smaller than 2.5%accuracy.

本文利用人工神经网络BP算法，提出了一种双隐层结构的电力系统超短期负荷预测方法，经过对实际数据的仿真实验，本文提出的神经网络超短期负荷预测方法比传统的线性外推法预测平均绝对百分误差降低2.5个百分点，十分钟负荷预测达到平均绝对百分误差小于2.5%的精度。

This thesis discusses how to use linear regression model in load forecasting.

本文讨论了如何用线性回归模型来进行负荷预测。

It gives a thorough study on three kinds of load curve forecasting models in this thesis.

本文集中对年最大负荷曲线、年电量分布曲线和典型日负荷曲线的预测模型进行深入的探讨。

Use nationalization degree and the relationship that commercialize degree, condition of calculable market economy plays scope of optimal and state-owned economy.

利用国有化程度与市场化程度的关系，可计算市场经济条件下最佳国有经济规模。

The kinds of extractant also effected desulfurization rate .

萃取剂对脱硫率的影响也很大，乙二胺的萃取效果优于甲醇的。