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集合
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  ensemble
    On a Four-Dimensional Variational Method and an Ensemble Kalman Filter to Assimilate Doppler Radar Data and Their Applications in Rainstorm Mesoscale Structure Retrieval
    四维变分和集合卡尔曼滤波同化多普勒雷达资料的方法及其反演暴雨中尺度结构的研究
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    THE ENSEMBLE FORECAST EXPERIMENT OF A SIMPLE MODEL WHICH INCLUDES RANDOM INITIAL VALUE AND RANDOM FORCING
    带随机初值和随机强迫的简单模式的集合预报试验
短句来源
    The advancement in ensemble-based data assimilation methods are reviewed,including Ensemble Kalman Filter(EnKF),Ensemble Kalman Smoother(EnKS),Ensemble Square-Root Filter(EnSRF),Singular Evolutive Extended Kalman Filter(SEEK). The main characteristics are outlined though comparing them with other data assimilation methods.
    综述了包括集合卡尔曼滤波(EnKF,Ensemble Kalman Filter)、集合卡尔曼平滑(EnKS,Ensemble Kalman Smoother)、集合方均根滤波(EnSRF,Ensemble Square-Root Filter)和减秩卡尔曼滤波(SEEK,Singular Evolutive Extended Kalman Filter)等集合数据同化方法的研究进展状况。
短句来源
    The numerical results show that there are signicicant uncertainties in the evolution of horizontal structure,rain,cloud prognostic variables and thermal and dyinamical fields. Therefore,explicit forecasts of precipitation,especially ensemble prediction of precpitation,should be performed together with the estimation of different uncertainties of different explicit schemes.
    结果表明:不同的显式方案模拟的对流风暴的最大垂直速度、水平结构和降水以及云物理量的演变都有很大的不确定性,说明要对实际降水进行全显式的数值预报可能需要对不同显式方案导致的预报结果的不确定性作出进一步的估计,集合预报中可能要考虑不同显式方案对预报结果不确定性的影响。
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    A Note on Ensemble Methods for Climate Prediction
    气候预测中的集合方法初探
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  “集合”译为未确定词的双语例句
    Methods of Producing Initial Perturbations in Ensembling Forecast
    集合预报中初始扰动生成方法的探讨
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    Application of Superensemble to Precipitation Prediction in China during Flood Season
    超级集合思想在汛期降水预测集成中的应用
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    A New Weighted Average Method on Ensmble Mean Forecasting
    一种新的集合预报权重平均方法
短句来源
    The developments and applications of ensemble-based data assimilation methods
    集合数据同化方法的发展与应用概述
短句来源
    The approach for automatic classification was Dynamic Fuzzy proposed by Diday, and a new distance called Displacement and Maximum Correlation was adapted.
    对集合预报进行划分的方法是 Diday提出的动力模糊法 ,初始划分时的重心由天气类型定义 ,划分用到的距离是位移和最大相关方法。
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  ensemble
The form of complex signals in the ensemble for radio navigation and remote control was optimized.
      
According to the numerical investigations, "the ensemble average coincides with the time average" in the neighborhood of the limiting set, i.e., it is sufficient to track only one path in solving optimization problems in such a system.
      
Selective control of the observables in the ensemble of quantum mechanical molecular systems
      
The canonical (T, V, N) ensemble at 25°C and Metropolis sampling technique have been used.
      
Expression was found for the resistance force averaged over random ensemble of fibers, which well describes the results of numerical simulation with the use of lognormal fiber radius distribution, including the case of high fiber polydispersity.
      
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In this paper authors has studied the non-consistency between functional valueλ = C7·B·C/C7·W·C and the discriminant effect (misjudging number), pointing out that the project space determined by the eigenvectors of the generalized eigenvalue problem (B-λw) 0=0 in the space consisting of m variables is uncertain of the optimization space in discriminant effect. In other words, the maxima] value of functional λ is not equivalent to the minimal value of the misjudging number.We has constructed a functional 1=1...

In this paper authors has studied the non-consistency between functional valueλ = C7·B·C/C7·W·C and the discriminant effect (misjudging number), pointing out that the project space determined by the eigenvectors of the generalized eigenvalue problem (B-λw) 0=0 in the space consisting of m variables is uncertain of the optimization space in discriminant effect. In other words, the maxima] value of functional λ is not equivalent to the minimal value of the misjudging number.We has constructed a functional 1=1 (C1, C2, …Cλ Cr) which is consistent with Fisher discriminant effect but has no analytic form. It is set up based on a set of linear functions. In this ease the minimal value of I is equivalent to the discriminant effect.Finally, we have found that the solution of minimal value of functional I may be obtained according to the solution of the maximal value of functional X using the optimum method. Thus, the optimization of project space in Fisher discriminant analysis has been solved. The calculations of eases have shown that the effect of discriminant analysis, which is carried out in the optimum project space by Bayes principle is better than that of the discriminant which ig carried out in the project space determined by the generalized eigenvalue problem (B - λw)C = 0.

本文对Fisher意义下的判别分析中泛函值 λ=C~T·B·C/C~T·W·C与判别效果(指 错判个数)之间的非同一性进行了讨论,指出在m个变量构成的m维空间中,由广义特征问题 (B-λW)C=0的特征向量所决定的投影空间不一定是判别效果最优的空间,即,泛函λ取 极值与判别效果取极值不是等价问题。 本文构造了一个与Fisher判别效果相一致,但又无解析形式的泛函: I=I(C_1,C_2,…,C_r)它建立在线性函数集合之上,I取极值与判别效果取极值是等价的。 文章提出了可采用最优化方法根据泛函λ值取极值的解求得泛函I值取极值的解,从而 解决了Fisher判别分析中投影空间的优化问题。实例计算表明,在优化的投影空间中进行 Bayes准则判别其效果要优于由广义特征问题(B-λW)C=0所决定的投影空间中所进行 的判别。

A low-order spectral model is used to study abrupt change of quasigeostrophic current forced by both orography and diabatic heating. In certain parametric combinations, along with the gradual change of external thermal forcing, it is found that abrupt changes of both the spectral coefficients and the locations of the west jet stream can be stimulated.Introducing the orography into the model results in a change of the parametric range in which the multiple equilibrium of flow patterns exist and the shift of the...

A low-order spectral model is used to study abrupt change of quasigeostrophic current forced by both orography and diabatic heating. In certain parametric combinations, along with the gradual change of external thermal forcing, it is found that abrupt changes of both the spectral coefficients and the locations of the west jet stream can be stimulated.Introducing the orography into the model results in a change of the parametric range in which the multiple equilibrium of flow patterns exist and the shift of the parametric critical points at which the abrupt change of the locations of west jet streams is created, as well as an increase of the wave components of the equilibrium flow patterns. The aspects of simulated "South-Branch" jet streams are quite similar to the observational fact in the present of both the orography and the diabatic hearing than those in the case of the heating forcing.

本文用低谱模式,研究了地形和非绝热加热共同强迫的准地转气流的突变。在一定的参数集合,随着外部热力强迫参数的渐变,激发出了谱系数与西风急流位置的突变。 与单纯非绝热加热强迫的情况相比,地形引入后,改变了流型多平衡态的参数范围和流型突变的参数临界点的位置,并使平衡态流型的经向度加大。由夏至冬转换期间突然建立的南支急流的形态也更为接近观测事实。

This paper, based on the theories of FUZZY sets and ridge regression, a forecasting equation for the annual early-rice output rank in Yulin district is established.

本文根据模糊集合和岭回归理论,将模糊集合嵌入岭回归方程中,建立了玉林地区早稻产量年景的气象预测方程。

 
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