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数估计
相关语句
  number estimation
     Source Number Estimation Using Cyclostationarity Property
     利用信号的循环平稳特性进行空间源数估计
短句来源
     Blind Source Separation Based on Signal Number Estimation
     基于源数估计的盲源分离
短句来源
     Many of the super-resolution DOA (Direction-of-arrival) estimation algorithms presume the number of signal sources. Since the sample snapshot is limited, however, the available algorithms on source number estimation may fail at lower SNR (signal-to-noise).
     在超分辨波达方向(DOA)估计方面,针对众多性能优良的估计算法通常需要预先判定信源数目,然而,现有的信源数估计算法在有限采样快拍条件下,估计性能随着信噪比的降低而下降,错误概率也相应增加,最终导致DOA估计失败的问题。
短句来源
     The transmitled signal used is linear frequency modulation (LFM) signal and the received signal within observation time is represented by the summation of multiple sinusoid signals in both range and Doppler dimension. The time-delay and Doppler information are used jointly to estimate the sample covariance matrix,and the final resolution algorithm is a high-resolution source number estimation method-the new modified Gerschgorin disk estimation (NMGDE) method.
     发射线性调频脉冲信号 ,将观测时间内的若干次回波在距离维和多普勒维分别转换为单频信号的叠加 ,再联合距离 -多普勒二维信息估计协方差矩阵 ,用超分辨信源数估计算法———新的改进盖氏圆盘法分辨目标架次 .
短句来源
     The detailed solution to the problem of number estimation was explained,and Monter-Carlo trials demonstrated that the performance of this method was better than the usual algorithms.
     给出了详细的计算方法,并用蒙特卡洛试验证实了该方法优于通常的源数估计算法。
短句来源
  “数估计”译为未确定词的双语例句
     Estimate Number of Competing Stations in IEEE 802.11 WLAN Based on Adaptive ARMA Filter
     基于自适应ARMA滤波器的IEEE802.11 WLAN竞争站点数估计方法
     The soil erosion modulus for whole basin was estimated as 1 746.1 t/km~2·a.
     整个流域的年侵蚀模数估计为1746.1t/km2·a。
短句来源
     Anther width had a relatively lower heritability of 50% and the number of genes involved in the trait was estimated to be up to 13,while for other 9 traits the heritabilities and gene numbers were estimated to be 68%-93% and 7-10,respectively.
     除花药宽的遗传力较低(50%)、且估计的基因数多达13个之外,其余9个研究性状的遗传力均较高,为68%~93%,控制这些性状的基因数估计为7~10个。
短句来源
     CFAR Detection of Radar Signal and Estimation of Spatial Signal Sources
     雷达信号恒虚警率检测及空间信号源数估计
短句来源
     Method to determine the NIS based on SVD and clustering
     基于SVD-Clustering的源数估计方法
短句来源
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  相似匹配句对
     Bayesian Estimation Of Psychological State Number
     心理状态的Bayes估计
短句来源
     b) a G-M estimator of ω'1α, ω'2β and ω'1α+ω'2β under L (Xβ, Aα; δ21V, δ22U} respectively.
     b)G-M估计
短句来源
     Estimation of Nielsen Numbers (Ⅱ)
     Nielsen估计,Ⅱ
短句来源
     A newmethod for the estimation of exponent regularity of the kind wavelet and related scalefunction is proposed.
     Daubechies的估计
短句来源
     Friendly Number
     亲和
短句来源
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  number estimation
A new source number estimation method based on the beam eigenvalue
      
Most source number estimation methods based on the eigenvalues are decomposed by covariance matrix in MUSIC algorithm.
      
Both of the theory analysis and the simulation results show that the BEM method can estimate the source number for correlated signals and can be more effective at lower signal to noise ratios than the normal source number estimation methods.
      
A general expression for gene number estimation which encompasses the conventional formula was derived.
      
It provides a basis for gene number estimation from the data of recurrent selection experiments that are not of sufficient duration to measure total response to selection.
      
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During the course of studies on the population dynamics of the European corn borerin Peking from 1961 to 1964, data were secured on the egg populations in a total of 19fields of spring-sown corn at whorl-stage. Based upon these data, the following pointswere analyzed: (1) The distribution pattern of the egg masses in corn fields. (2)Relations between the percentage of plants with one or more egg masses and the numberof total egg masses accumulated during the entire whorl-stage. (3) Relations betweenthe number...

During the course of studies on the population dynamics of the European corn borerin Peking from 1961 to 1964, data were secured on the egg populations in a total of 19fields of spring-sown corn at whorl-stage. Based upon these data, the following pointswere analyzed: (1) The distribution pattern of the egg masses in corn fields. (2)Relations between the percentage of plants with one or more egg masses and the numberof total egg masses accumulated during the entire whorl-stage. (3) Relations betweenthe number of egg masses at the peak stage, i.e., the highest number of egg masses foundon any one day, and the total egg masses accumulated during the entire whorl-stage. The analyses of these field data show: 1. Since the observed frequency of plantsreceiving various numbers of egg masses during entire whorl-stage fitted the expectedfrequency according to the Poisson series closely, the distribution of the egg masses in cornfields is fully random. Therefore, the percentage of plants with one or more egg massesis proportional to the total number of egg masses accumulated. 2. The relations between the percentage of plants receiving one or more egg masses(P) and the number of egg masses per 100 plants (X) during entire whorl-stage of 15corn fields was shown in Figure 1. This relationship can be generally expressed by P=1--e~(-ax~b)where a and b are constant. Putting m=ax~b, the values of a and b can be calculated bytransforming above equation to log m=log a + b log XBy estimating the parameter a and b, the following equation was obtained P=1--e~(-0.00985x~(0.9984))Table 3 gives the calculated values of x to different percentages of P. 3. Data on the total number of egg masses per 100 plants for the entire whorl-stage(Y) and the highest number of egg masses per 100 plants found on any one day (X)in 17 corn fields are presented in Table 4. A X~2 test for goodness-of-fit reveals alinearship between the two variates, indicating the peak of egg deposition is directly pro-portional to the total number of egg masses deposited during the entire whorl-stage. Theregression equation is Y=11.47 + 2.64XThe straight line that corresponds to this equation is plotted in Figure 2. By using theabove equation, the value of Y would be determined for any given value of X. There-fore, the use of the latter record as an index of the former appears to be biologicallysound.

根据1961—1964年对两个品种、19块春玉米地心叶期着卵量及着卵株率的调查资料,分析了:1)卵块在田间的分布型式,2)着卵株率与百株累计卵量的关系,3)百株高峰卵量与累计卵量的关系。 分析表明:心叶期卵块在田间的分布型式符合于随机分布,因此着卵株百分率与百株累计卵块数之间存在着正相关的关系。 着卵株率(p)与百株累计卵块数(x)间有 P=1-e~(-0.00985_x~(0.9984))的曲线函数关系。作者利用此式制成了一个由著卵株百分率来推算百株累计卵块数的检索表(表3)。 心叶期百株高峰卵块数(x)与百株累计卵块数(Y)之间则有直线回归的关系,以百株高峰卵块数估计百株累计卯块数的回归式为:Y=11.47+2.64x。 利用上述两种调查方法来估计心叶期的累计卵块数可以大大节省时间和人力。这两个方法在实用上各有其优缺点,可以根据具体情况任用一法。

A procedure of simultaneous calculations for correcting regression coefficients due to deletion and/or addition of observations is developed, which includes the Plackett result as a special case. Considerations with respect to deleting observations in relation to the missing values problem in the factorial experiment lead to a different, yet feasible, approach to the correction problem. That is, with the deleted observations being first estimated, the correct regression coefficients turn up naturally.As for...

A procedure of simultaneous calculations for correcting regression coefficients due to deletion and/or addition of observations is developed, which includes the Plackett result as a special case. Considerations with respect to deleting observations in relation to the missing values problem in the factorial experiment lead to a different, yet feasible, approach to the correction problem. That is, with the deleted observations being first estimated, the correct regression coefficients turn up naturally.As for estimation of missing values, the principle of least squares may be worked into a tabular form equivalent in the wide sense to the method of cross-contrasts as was proposed in a previous paper by one of the authors.

本文导出关于舍去或(并)加入数据的回归计算公式(包括了Plackett的结果作为特例)。并在舍去数据方面,结合析因试验中缺数的估计问题,得到回归计算的另一种可行方法——先补缺,后回归。 根据交互对比法与最小二乘法的等效性,按最小二乘法补缺,可表格化为一般意义的交互对比法。

This paper deals with the applioations of multiple-knot cardinal δ-spline function interpolation to the problem of fitting in a great deal data, as a continuation to past(Ⅰ) and(Ⅱ)of the same title by the same author.The author has established the least squares fit by multiple-knot δ-spline, pointed out that coefficient matrix of the system of its normal equation has the characteristics of band and majorant and so on,and estimated its condition number for degree of m.c.δ-spline k≤3.The given intrisical property...

This paper deals with the applioations of multiple-knot cardinal δ-spline function interpolation to the problem of fitting in a great deal data, as a continuation to past(Ⅰ) and(Ⅱ)of the same title by the same author.The author has established the least squares fit by multiple-knot δ-spline, pointed out that coefficient matrix of the system of its normal equation has the characteristics of band and majorant and so on,and estimated its condition number for degree of m.c.δ-spline k≤3.The given intrisical property and its explicit expression would bring facilities for its applications, especially for computer-aided geometricdesign.

本文研究多结点基数型δ-spline函数对大量数据拟合问题的应用,是同名文章(Ⅰ)、(Ⅱ)的继续。我们将给出多结点样条的最小二乘逼近方法,指出正规方程组的系数矩阵具有带状强对角优势等特点,并对实用的k=2,3的情形给出了条件数估计。 正规方程组的良好性质及逼近样条的显式表达将给它的应用,尤其是计算机辅助几何设计有关问题,带来极大的方便。

 
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