预报准确率

因此改善初始场的客观分析效果，是提高预报准确率的一个重要方面。

Thus , the improvement of the objective analysis would result in the increase of forecast accuracy .

实验和分析表明，该方案有较高的预报准确率和较小的时间开销。

Experimental results and analyses show , this scheme has higher forecast accuracy rate and less time / space expense .

日均API的预报准确率可达80%以上；

Forecasting accuracy of daily mean API can exceed 80 % ;

不同因子处理方法对广西MOS方程降水预报准确率影响的试验

Examination of the Effect of Different Factor Treatment on the Accuracy of MOS Equation Precipitation Forecast in Guangxi

利用支持向量基（SVM））方法进行甘肃森林火险等级预报准确率较高，将其运用于甘肃省森林火险预测预警系统是切实可行的。

Support Vector Machines ( SVM ) method can improve forest fire forecasting accuracy . It is feasible to introduce SVM into fire danger forecasting model .

48h温带气旋强度预报准确率为69%，位置预报准确率为71%。

48 h forecast accurate rate of the extratropical cyclone on intensity was 69 % , accurate rate on place was 71 % .

结果表明，在局地气候动力系统的预测中，Poincar啨截面法具有良好的历史预报准确率和外推预报准确率。

The application results indicated that the poincar é section method can efficiently simulate and predict the evolution of local climatic dynamical system .

此外，CAPPS系统的污染指数等级预报准确率（北京市和上海市）平均达到61.5%。

Furthermore , the averaged prediction accuracy of pollution level has reached 61.5 % in Beijing and Shanghai .

结果表明：该系统能较好地对24h污染气象条件进行预测，污染气象条件的预测结果与监测结果比较吻合，预报准确率PM10为61%、SO2为92%；

Results show that the system can forecast pollution meteorological condition in 24 hours , and the prediction result corresponds to monitoring result well , the prediction accuracy for PM_ ( 10 ) and SO_2 is 61 % and 92 % , respectively ;

利用Box-Jenkins模型，对桑树白椹和断梢病的流行发生分别进行了摸拟，得到两个回报准确率为100%，预报准确率分别为91.49%和82.77%的数学模型。

Based on Box-Jenkins model , the epidemics of mulberry white fruit and mulberry shoot break disease were simulated . Two epidemics models were fitted respectively . The average degree of accuracy of fitting tests for both models was 100 per cent .

实验结果表明在正负类样本极不平衡的情况下，HOCC比SOCC和AHC-BSVM的分类预测效果要好，运用HOCC预测强震能够提高预报准确率，降低误警率。

Under the extremely imbalance of the positive and negative samples , experiment shows that HOCC obtains better prediction result than SOCC and AHC-BSVM . Applying HOCC for predicting strong earthquake can improve the accuracy and lower the false alarm rate .

实验还表明AHC-BSVM对小震的预报准确率要高于中强震，误警率低于中强震。（2）当设置的阈值较大时，我们可以预测强震。

And it also shows that it has higher accuracy and lower false alarm rate to predict the small earthquake than to predict the medium one by AHC-BSVM . ( 2 ) When the threshold is large , we can predict the strong earthquake .

污染指数的预报准确率达76%。

The accurate rate of pollution index forecast reaches 76 % .

日本传真天气图上温带气旋预报准确率分析

Analysis on forecast accurate rate of the extratropical cyclone in Japanese meteorological facsimile chart

大风风力预报准确率的统计特征分析

Statistical characters of the accuracy of gale forecasting

建模样本编辑与模型预报准确率的关系

The inquiry into the relations between compilation of BUILD-MODEL samples and accurate ratio of model forecast

结果表明：支持向量回归的预报准确率较高，预测结果稳健性方面也有一定的优势。

It is shown that support vector regression is superior to other models in accuracy and robustness .

结果，保证了采矿安全，提高了预报准确率。

As a result , the degree of prediction accuracy is increased , and mining safety is provided .

温度距平和雨量距平率的外推预报准确率分别为75%和63%。

The forecasting accuracy of temperature anomaly and rainfall anomaly ratio is 75 % and 63 % respectively .

结果表明，采用新方法制作的空气质量预报准确率有一定程度提高。

Results show that the new method can improve the forecasting accuracy of air quality in a certain degree .

由于岩溶问题的复杂性、多变性和不确定性，地质预报准确率较低，这是国内外隧道施工地质界尚未攻克的技术难题。

Due to the complexity , changeability and uncertainty of karsts terrains , the rate of predicting accuracy is low .

雷暴天气作为中小尺度的强天气现象，其预报准确率的提高仍是世界范围内的一大难题。

Thunderstorm , as one of the middle-small scale extreme weather phenomena , its accurate forecast is still difficult in operation .

试报结果表明，这种方法对提高强降雨落区的短时预报准确率是可行的。

The result indicates that , this method is feasible for improving the short-time forecast rate of accuracy on the severe rainstorm area .

为了提高对武汉天河机场夏季强雷雨天气预报准确率，利用极值剔除法选取了5个预报因子；

In order to improve the quality of forecasting summer heavy thunderstorm , 5 forecast factors were picked with the extrema elimination method .

根据大气层结稳定度，选择不同的热扰动强度，可使空报次数明显减少，预报准确率提高到69.3%。

According to the atmospheric layer stability , different heat disturbance indensity was selected , the hail forecast correct rate increase to 69.3 % .

应用表明，柴油机故障诊断专家系统的预报准确率较高，具有较强的实用性。

The results of its application show that the fault diagnosis expert system for diesel engine has high forecast accuracy and strong practical applicability .

冷锋、气旋和台风影响下的降水预报准确率明显高于暖锋和副高影响下的降水。

When the rain is caused by cold front , cyclone or typhoon , the rainfall forecast skill is higher than warm front or subtropical high .

提高对流天气临近预报准确率的关键问题之一是了解大气的垂直稳定度和垂直风切变。

To improve the accuracy of convection weather forecast , one of the key issues is to find out the atmospheric vertical stability and wind shear .

其平均预报准确率为75.4%，有较好的预报能力。

The local temperature amplitude always decreases with time , and their average forecasting accuracy is 75.4 % , which indicate that the equations have better forecasting ability .

通过对影响结晶器专家系统漏钢预报准确率的原因进行分析，实施了相应的改进措施，取得了良好的效果。

Factors affecting the precision of the expert system in prediction of the mold breakout are analyzed and appropriate counter-measures adopted and very satisfactory results achieved as well .