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预报效率
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  “预报效率”译为未确定词的双语例句
     This article abstracted scientific theory and method of grey system,The rock missteady sound emission prediction model were made in computer exploitation by Visual C~(++) and grey theory GM(1,1),it insured local data accurated and celerity and efficency.
     吸收灰色系统的科学理论和方法,运用灰色理论GM(1,1)模型建立岩体失稳声发射预测预报模型并实现预测预报,将整个预测预报系统采用VisualC++语言进行计算机可视化开发,实现了可视操作,保证了对现场监测数据快速、准确处理,提高了监测预报效率
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     On this basis, using the least squares method calculated from alterable oblivious factor, the paper has done real-time correction of the routing results of forecast model, therefore, the coefficients of efficiency are improved further.
     在此基础上,运用可变遗忘因子递推最小二乘算法对预报模型汇流结果进行实时校正,洪水预报效率系数有进一步提高。
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     These two factors,which affect the accuracy of the method of seismic velocity a great extent,must be paid our attention.
     以上两因素对波速比方法的预报效率影响甚大,值得人们重视。
短句来源
     The application of Artificial Neural Networks to the prediction of Geomagnetic Index is introduced in this paper. The topology of one of such Networks-Multi-Layer perceptron,which is applied to the prediction of C9 Index, the efficiency of prediction and the features and problems in the practice of prediction are discussed.
     介绍了人工神经元网络在磁情预报中的应用研究.并对具体应用于C9指数预报的MLP的拓扑结构、预报效率及在预报时所表现出的特点和问题进行了讨论.
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     The results show that mass-flux scheme gives a more reasonable cumulus rain region than Kuo-type scheme and improves the model daily precipitation forecasts for≥10.0 mm and its precipitation forecasting efficiency skill scores of all kinds of precipitation intensity.
     结果显示:质量通量方案能给出比Kuo型方案更合理的积云降水落区; 质量通量方案对模式预报≥10.0mm的降水有一定的改进,并提高了各种降水等级的预报效率评分值
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     “八股文”的效率
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The factors of the timing system and Wadati's method affecting the accuracy of seismic velocity ratio are discussed and analysed.The former,which is a technical problem,may be resoluble while the inaccuracy of the latter is innate in tne method itself.At present,the evaluated "apparent seimic velocity ratio" may cover or fabricate the anomaly of seismic velocity ratio.These two factors,which affect the accuracy of the method of seismic velocity a great extent,must be paid our attention.

本文对影响波速比方法的时间服务系统和和达法的局限性进行了分性析和讨论。前者是个可克服的技术问题,后者是一般波速比方法本身固有的。目前所求得的“视波速比”可能掩盖和伪造异常信息。 以上两因素对波速比方法的预报效率影响甚大,值得人们重视。

In Marine and Ocean engineering area, the performance prediction is very important, and model test is an efficient method to carry out this prediction. With the development of modern control theory and using computer, on-line identification can be used in the model test. Here we introduce a method and equipment of on-line linear data identification for a swing mathematic model. That will increase the accuracy and efficiency of the model test and the performance prediction.

在舰船及海洋工程领域里,性能预报是非常重要的,而模型试验是完成这种预报的一种有效方法。随着现代控制理论和计算机应用的发展在线辨识已在模型试验中得到应用。本文介绍一种对摇摆数学模型线性参数在线辨识的方法和装置。这将提高模型试验和性能预报的效率和精度。

The preparation gap method has been extensively applied to earthquake prediction practice in China and some strong earthquakes are successfully forecasted with help of this method. It is found that the false alarm rate and rate of failing to forecast by using this method are still higher according to systematic study of earthquake cases. In this paper authors applied the renormalization group method, which has been used to the critical phase transformation, to give the criterion of strong earthquake occurrence...

The preparation gap method has been extensively applied to earthquake prediction practice in China and some strong earthquakes are successfully forecasted with help of this method. It is found that the false alarm rate and rate of failing to forecast by using this method are still higher according to systematic study of earthquake cases. In this paper authors applied the renormalization group method, which has been used to the critical phase transformation, to give the criterion of strong earthquake occurrence due to crack's instable extesion possibly created in preparation gaps and further distinguish the risk of the preparation gaps, then to solve the cusp catastrophic equation with the catastrophism method to predict time and magnitude of future strong earthquake in the gaps, finally to get a better determination of earthquake risk in the preparation gaps. The method proposed in this paper is applied to the preparation gaps formed before 26 strong earthquakes in the mainland of China. The results show that the method which combines the index of prepqration gaps with renormalization group theory and catasrophism theory to identify the risk of preparation gaps and predict the magnitude and time of future earthquakes, may significantly improve the earthquake prediction. The false alarm rate of this method is reduced to 20%, the rate of failing to forecast is reduced to zero. Therefore, R value (represents the quality of prediction ) rises from about 0.3 to 0.8. The further perspective tests are necessary fqr the above-mentioned results and conclusions, that is, to study the cases in which preparation gaps have ocurred but no corresponding earthquakes observed, and to make some prediction for the possible earthquakes and to evaluate the efficiency of the method.

在中国,孕震空区已经比较广泛地应用于地震预报的实践,并多次取得实际预测强震的效果。但经过系统震例研究发现,利用孕震空区预报地震的虚报漏报率比较高。本文运用解决临界相变问题的重正化群方法所求出的孕震空区可能发生失稳破裂,导致强震发生的判据对孕震空区的危险性作出进一步鉴别,并用突变论方法求解尖拐突变方程,预测孕震空区未来发生强震的时间和震级,并进一步确定孕震空区的危险性。对26个中国大陆强震前的孕震空区,运用上述方法系统研究结果表明:综合利用孕震空区识别标志,重正化群和突变论方法来鉴别孕震空区的危险性及预报未来地震发震的震级和时间,可以显著提高用空区预报地震的效果,其虚报率可减少到20%漏报率减少为0,从而使表征预报效果的R值从0.3左右增加到0.8左右。当然本文的结果尚须作进一步展望性检验,即对还未发生地震而出现孕震空区的情况进行研究,以期事先作出某种预报并确切估计出本方法的真实预报效率

 
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