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fitting methods
相关语句
  拟合方法
     Study on the fitting methods of logistic curve
     Logistic曲线拟合方法研究
短句来源
     Comparision of fitting methods in prediction of COX2 inhibitors' effect
     COX2抑制剂活性预测中的拟合方法比较
短句来源
     Fitting Methods for Normal Height with GPS
     利用GPS高求取正常高的几种拟合方法
短句来源
     Comparison of GPS-Leveling Fitting Methods and Software Programming
     GPS水准拟合方法的比较与软件编制
短句来源
     A Study on Optimum Fitting Methods of Nonlinear Models
     非线性模型最佳拟合方法的研究
短句来源
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  “fitting methods”译为未确定词的双语例句
     Measurements of Surface Tension of Li_2B_4O_7·KNbO_3 Solution by Contour Curve Fitting Methods
     应用轮廓吻合法测量Li_2B_4O_7·KNbO_3溶液的表面张力系数
短句来源
     Effect of Various Fitting Methods on Corrosion Fatigue Properties of LY12CZ Al-Alloy Typical Bolt Joints
     不同装配方法对LY12CZ铝合金典型螺接件腐蚀疲劳性能的影响
短句来源
     This modelling method completely removes the intrinstic errors of existing grey differential fitting methods, and expands the application range of GM(1,1) Moreover, its computational method is simple, and its computational effort is less than that of the grey differential fitting method.
     本文所给建模方法,彻底根除了现有灰色微分拟合法存在的固有误差,拓广了GM(1,1)的应用范围,且计算方法简单,计算工作量小于灰色微分拟合法。
短句来源
     The vertical crustal movement data (in 1984, 1987 and 1991)before and after Datongearthquake (Ms = 6. 1) are processed and analysed with smoothing filtering and fitting methods.
     利用平滑滤波拟合法,对大同地震(Ms=6.1)前后的3期(1984、1987、1991)地壳垂直形变资料进行了处理和分析。
短句来源
     Comparison on the linear regression and curve fitting methods in the analysis of the breaking strength of fiber ropes
     纤维绳索强度分析中线性回归与曲线拟合法的比较
短句来源
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  相似匹配句对
     Arc Fitting
     圆弧拟合
短句来源
     On the Rule of Fitting
     论拟合法则
短句来源
     There are lots of methods of fitting Logistic model.
     逻辑斯谛模型拟合的方法很多。
短句来源
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  fitting methods
Part 2 is a discussion of curve fitting methods for functions of one variable.
      
Exponential-fitting methods for the numerical integration of the fourth-order differential equation yIV+f·y=g
      
The measured dark currents of the diodes processed by post implantation annealing with different annealing times are analyzed using current model fitting methods.
      
Fitting methods involving pLn versus pCH and the average ligand number vs.
      
With the power law, two different fitting methods have been tested: the usual "6 + 1" method and a "6 + 6" method proposed here for giving more weight to the final point of the curve.
      
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The excessive rainfall of Shanghai is analyzed through utilizing 37 years (1919—1956)self-recording raingage records. Firstly, by averaging these 37 sets largest excessive rainfall intensities and plotting the intensity-duration relation curve on logarithmic paper. The resulting curve breaks into two approximately straight lines. By purely empirical curve fitting method we obtain two straightline equations. Secondly, the recurrence interval and“rain-strength” relation curve on logarithmic paper will also...

The excessive rainfall of Shanghai is analyzed through utilizing 37 years (1919—1956)self-recording raingage records. Firstly, by averaging these 37 sets largest excessive rainfall intensities and plotting the intensity-duration relation curve on logarithmic paper. The resulting curve breaks into two approximately straight lines. By purely empirical curve fitting method we obtain two straightline equations. Secondly, the recurrence interval and“rain-strength” relation curve on logarithmic paper will also break into two lines, one of the quadratic form, another of linear. Combining the results we obtain the excessive rainfall formulae for Shanghai with very small root mean square difference, which may be useful for practical design of storm sewer & etc. in municipal planning.

本文根据上海37年(1919—1955)自记雨量计记录,取用37组最大暴雨强度,取其平均值,在对数坐标轴内作出强度和历时的关系曲线,然后按照曲线外形,分裂为二,分别用雨条直线来配合。而在对数坐标轴内,频率和雨力的关系曲线,也分裂为二,分别用二次曲线和直线来配合,综合而成均方差很小的上海暴雨公式,以供市政规划设计的应用。

Based upon the method of statistical testing,this paper analyses and compares the methods of moments, maximum likelihood and curve-fitting in the case of Pearson type Ⅲ distribution. For the curve-fitting method, a comprehensive comparative analysis is made on seven criteria of curve fitting and mainly on the two of them-the least squares criterion φ1 andthe least absolute-values criterion φ2, as well as on the various plotting position formulas.Moreover, the role of historical...

Based upon the method of statistical testing,this paper analyses and compares the methods of moments, maximum likelihood and curve-fitting in the case of Pearson type Ⅲ distribution. For the curve-fitting method, a comprehensive comparative analysis is made on seven criteria of curve fitting and mainly on the two of them-the least squares criterion φ1 andthe least absolute-values criterion φ2, as well as on the various plotting position formulas.Moreover, the role of historical flood is also examined. The results of calculation indicate that the quantity Xp derived from the moment method has a much smaller expected value EXP than the true value xp?of the population and that this is on the unsafe side. The maximum likelihood method yields somewhat better result but it cannot be accepted as a universal method because it yields no solution to Pearson Ⅲ .curve when Cs≥2. For the curve fitting method, it is found that the result is substantially affected by the criterion used for curve fitting.In general, φ2 criterion associated with Weibull formula ( abbr. in φ2-W ) may give slightly greater EXP than xpo and smaller root-mean-square error σXp. Consequently, φ2-W curve-fitting method proves to be the better one among all the methods available. The use of historical flood would usually increase EXP and decrease σXp and is, therefore, an important means to improve the computational results.

本文采用统计试验方法,对于P-Ⅲ型曲线分析对比了矩法、极大似然法和适线法.在适线法中分析比较了七种不同的适线准则,并着重比较了其中的平方准则φ_1和绝对值准则φ_2,同时也分析比较了各种不同的经验频率公式.另外,还研究了历史洪水的作用.大量计算结果表明:矩法所得的设计值X_p,其期望值EX_p比总体真值x_p~0偏小较多,不够安全;极大似然法虽具有较好性质,但由于P-Ⅲ曲线在C≥2时似然方程无解,因此无法普遍使用;在适线法中发现适线准则对结果的影响很大,φ_2准则配合期望值公式(简记为φ_2-W)一般能使EX_p,稍大于x_p~0,较小(与矩法接近),因此φ_2-W适线法是较好的一种估计方法,应予采用.考虑历史洪水一般使EX_p增大、σx_p降低,因此是提高计算成果质量的重要措施.给出了历史洪水折算长度的参照数值,计算了历史洪水误差的影响.并修正了计算设计洪水安全改正值用的B值图.

In this paper, the general method for analysing the flight test results of liquid rocket dynamic parameters is synthetically introduced, the merits, and accuracy of different methods are analysed. It is pointed out that in general the fitting method may be used for improving the accuracy of analysed value of test results and that the external trajectory measuring method, also called flow displacing method, is available. On the basis of analysing the error characteristics obtained...

In this paper, the general method for analysing the flight test results of liquid rocket dynamic parameters is synthetically introduced, the merits, and accuracy of different methods are analysed. It is pointed out that in general the fitting method may be used for improving the accuracy of analysed value of test results and that the external trajectory measuring method, also called flow displacing method, is available. On the basis of analysing the error characteristics obtained from the external trajectory measuring method, the reason why this method may be applied to the whole trajectory is stated, while in the past it was not so considered.

本文对液体火箭动力参数飞行试验结果分析的一般方法作了综合性的介绍,并对不同方法的优缺点和精度作了分析。文中指出:(一) 为提高结果分析值的精度一般可采用拟合法;(二) 提出一种外测法称流量置换法,在对此种方法的误差特性作出分析的基础上,对以往认为这种方法不可在整段上使用一说提出异议,说明了此种方法可以在整段上使用的道理。

 
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