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参数比
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  ratio of parameters
     The Interval Estimates about the Ratio of Parameters in the Two Exponential Distributions
     两指数分布总体参数比的区间估计
短句来源
     By using F-distribution,the method of interval estimate about the ratio of parameters in the two exponential distributions is given. The method of the shortest interval estimate is studied and illustration is shown by an example.
     利用F-分布给出了两个指数分布总体的参数比的区间估计的方法,并研究了指数分布参数比的最短区间估计,通过实例介绍了最短区间估计方法的使用.
短句来源
  parameters proportion
     The Best Confidence Interval of Failure Rate Parameters Proportion on Censored Data(Ⅱ) :
     关于定数截尾失效率参数比的最优置信区间(Ⅱ)——最优置信区间与UMAU置信区间的等价性
短句来源
     The confidence interval of failure rate parameters proportion can judge the difference of two different product average failure rate, so, it is very important to obtain a reliable and accurate interval estimation of parameters proportion.
     失效率参数比的置信区间可用来判定两种产品平均失效率的差异,因此,对参数比做出尽可能可靠和精确的区间估计是非常重要的。
短句来源
     The theory of the best interval estimation is improved,which provides the theory base for application,such as studying about the best confidence interval estimation of failure rate parameters proportion on censored data.
     进一步完善了最优区间估计的理论,为定数截尾失效率参数比的最优置信区间估计提供了理论依据。
短句来源
     Interval Estimation Of Exponential Distribution On Parameters Proportion of Possessing Uniformly Minimum Mean Length Based On Censored Data
     定数截尾失效率参数比的具有一致最小平均长度的区间估计
     The Best Confidence Interval of Failure Rate Parameters Proportion on Censored Data (I): Existing, Algorithm And Application
     关于定数截尾失效率参数比的最优置信区间(Ⅰ)——存在性、算法及应用
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  “参数比”译为未确定词的双语例句
     2. It introduces a short-cuts design method for designning volute springs using ratio ζ=R, /a. η =R_2/R_1 and function ψ(ζ,η), when the working loads, mounting space and its allowable stress are known;
     2.已知工作载荷,安装空间和许用应力时,利用参数比ξ=R_1/a,η=R_2/R_1和函数ψ(ξ,η)设计截锥涡卷弹簧的简化设计方法;
短句来源
     The XRD analysis showed that the product was single-phase BaTi_4O_9,but the d value and the crystal constant of the powder were less than those of normal BaTi_4O_(9).
     由于掺镨量较小(3%),XRD成分分析结果表明,产物仍为单相BaTi4O9,但粉体d值和晶胞参数比纯BaTi4O9减小.
短句来源
     This transfer has been compared with the Mn2+(g)-Mn2+ (r) transfer and discussed as well. The ratio of Racah parameters r=C/B and the crystal field 10Dq in the series of solid solutions increased as the SrAl12O19 concentration went down.
     Mn~(2+)格位(4f和2a)的晶场强度10Dq和Racah参数比C/B随SrAl_(12)O_(19)增加而呈减小趋势。
短句来源
     Several cut performance parameters of La3Ga5SiO14 crystal as well as the comparison between La3Ga5SiO14 crystal and SiO2 crystal are also produced briefly.
     简要介绍La3Ga5SiO14晶体几种切型下的性能参数和La3Ga5SiO14晶体与SiO2晶体实际切型下的性能参数比
短句来源
     Experimental results show that the lattice constants of β phase are larger than those of α phase in the phase transformations of the LaNi 4.75 Al 0.25 H system, namely during α→α+β→β , the crystal lattice constants of α phase and β phase are almost constant in the plateau.
     实验结果表明 :在 L a Ni4 .75Al0 .2 5吸氢发生的相转变 ,即α→α+β→β过程中 ,β相的晶胞参数比α相的参数大 ,并且α相与β相的晶胞参数在压力 -组成 -温度曲线 (P- C- T)的平台段几乎不变 ;
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  ratio of parameters
Also, it is found that, depending on the ratio of parameters of the pump, nonradiative transitions, and relaxation, different regimes of superfluorescence and stimulated superradiance may be realized.
      
Age-related peculiarities of ratio of parameters of functioning of hemo- and liquorodynamics systems
      
The optimum ratio of parameters-the temperature of the heat-transfer medium, the length of the flare, and the moisture content and dispersivity of the slurry, which ensure equalization of the grain-size distribution of the product-is determined.
      
Their reaction in relation to the ratio of parameters of the problem has the nature of sticking together or Coulomb friction.
      


A statistical study has been made of the relation of 40 events of 9.4 GHz (λ= 3.2Cm) solar radio bursts to the solar proton emissions during the period of 1966-73.The survey of eight characterestics of solar microwave bursts in regard to their usefulness for indicating the intensity of associated solar proton emissions suggests that the energy parameters are much better than time and flux density parameters-The values of proton emissions predicted by the time parameters (involving the ef-fective duration Tm)...

A statistical study has been made of the relation of 40 events of 9.4 GHz (λ= 3.2Cm) solar radio bursts to the solar proton emissions during the period of 1966-73.The survey of eight characterestics of solar microwave bursts in regard to their usefulness for indicating the intensity of associated solar proton emissions suggests that the energy parameters are much better than time and flux density parameters-The values of proton emissions predicted by the time parameters (involving the ef-fective duration Tm) seem to be larger than the actual values in the cases of g. r. f. bursts. The flux density parameters, such as peak flux density Smax, are not very useful indicators of proton flux density for impulsive microwave bursts. However, if a certain time threshold value is exceeded, for example, T2/1> 2 min., then there isa close relation between the mean flux density S- and solar proton flux density Ip> with a correlation of 0.8.

本文对1966—1973年期间的40个9.4GH_z(λ=3.2cm)太阳微波射电爆发与太阳质子发射之间的关系进行了统计研究。 考察了太阳微波爆发的八个参量对于预报伴随的质子发射强度的效能,结果表明能量参数比时间参数和流量密度参数要好。用时间参数(包括有效持续期T_M)预言的质子强度,对于渐升渐降型爆发,要比实际值高。而流量密度参数,诸如峰值流量密度Smax,对于脉冲型爆发来说,不是很好的指示因子。但是,如果超过某一时间阈值,例如T_(1/2)>2分钟,则在平均流量密度(?)与太阳质子流量密度I_P之间有着紧密的相关,相关系数约为0.8。

In this work, we collected the observed data of 266 earthquakes occurred in China and its bordering region during the years 1952-1971. A total of some 20,000 arrivals of P and S waves were available from more than 500 seismological stations at home or abroad. In order to reduce the travel time data of all earthquake focal depths to that of surface foci, and to "strip" the earth's crust, a 2-layer average velocity model of the crust for the region was proposed based on observations of large explosions and results...

In this work, we collected the observed data of 266 earthquakes occurred in China and its bordering region during the years 1952-1971. A total of some 20,000 arrivals of P and S waves were available from more than 500 seismological stations at home or abroad. In order to reduce the travel time data of all earthquake focal depths to that of surface foci, and to "strip" the earth's crust, a 2-layer average velocity model of the crust for the region was proposed based on observations of large explosions and results of some other studies of crustal structure, combined with the above mentioned data of seismological observations. All of the earthquake epicenters and origin times have been revised by an iteration procedure. The smoothing technique of cubic splines as described by Curtis (1970) was applied for the P and S travel times for surface foci. The Herglotz-Wiechert-Bateman method was used to inverse P and S velocity distribution with depths in the mantle for this region. Finally, a set of travel times tables of P and S waves for various focal depths were constructed in the epicentral distance range of △= 0°-104°. Practical experiences show that the new tables have been relatively improved in accuracy for epicentral location of earthquakes of this region than other tables.

本文搜集了1952—1971年发生在我国境内及边境地区266次地震的观测资料,得到国内外五百多个地震台的 P 和 S 震相到时约二万条;根据我国地区大爆炸观测及其他地壳结构的研究成果,结合上述地震观测资料,提出了中国地区双层平均地壳速度模型,以便由深度走时校正把各种震源深度上的走时折算为表面震源走时,并进行“剥壳”处理.用迭代法校正震中和发震时刻.采用1970年寇蒂斯(curtis)所述的立方样条函数平滑数据的方法,得到表面震源 P 波和 S 波的走时表.运用海格劳兹-维谢尔特-贝特曼(Herglotz-Wiechert-Bateman)速度反演的方法求得中国地区地幔中,P 波和 S 波速度随深度的分布.算出震中距离Δ=0°—104°,各种震源深度的一整套 P 波和 S 波走时表.经过试用的实践表明,用它来测定震中参数比用国外的走时表具有较高的精确度.

A statistical method is employed to estimate the parameters of a non-linear thermodynamical model and it can be used in studying vapor-liquid equilibrium reiatioriships (VLE). "Ordinarily, the parameters are obtained by minimizing the objective function which is derived from the summation of all the squares of residuals between the experimental measured data and the numerical values from computation. Since the experimental measurements are inherently subjected to various sources of errors, obviously, the mentioned...

A statistical method is employed to estimate the parameters of a non-linear thermodynamical model and it can be used in studying vapor-liquid equilibrium reiatioriships (VLE). "Ordinarily, the parameters are obtained by minimizing the objective function which is derived from the summation of all the squares of residuals between the experimental measured data and the numerical values from computation. Since the experimental measurements are inherently subjected to various sources of errors, obviously, the mentioned method is impossible to take all the errors into consideration. Consequently, it will often give, more or less ambiguous results. In our method, some functions of certain variables are first established according to thermodyriamic theory. They are so constructed that their mathematicat expected values are made to zero. Several. model, parameters are included in these funetions. The numerical values of these functions in different experiments are assumed to distribute in normal form, and their variances are computed from that of measured variables by the principle of error proagation. Likelihood function is then constructed for these functions. By means of non-linear least square method with the step length restricted in a suitable way, a set of maximum likelihood estimates Of parameters is obtained. At the same time, the confidence region of parameters is also determined. Several examples of binary. VLE are presented to illustrate the practical usage of this method.The results show that the parameteres obtained by this method are more rational than that obtained by ordinary method.

本文介绍一种估计非线性热力学模型参数的统计方法,它可以应用于汽液平衡研究。通常,参数是通过使由偏差平方和构成的目标函数极小化而得到的,但这种方法忽视了实验数据具有误差的事实,常使结果带有任意性。在我们的方法中,首先在热力学理论的基础上建立若干个变量的函数,这些函数的数学期望为零。在这些函数中包括有模型参数。我们假定在不同实验中这些函数的数值服从正态分布,其方差则由测量变量的方差按误差传递原理计算而得。然后对这些函数构作似然函数。利用非线性最小二乘方法,并按适当方式限制其步长,可得一列参数的最大似然估计值,并同时得到参数的置信区间。文中介绍了若干二元汽液平衡的实例,表明本方法所得参数比常规方法更为合理。

 
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