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test of significance     
相关语句
  显著性检验
     The test of significance showed that the effect of Fe3+,Mn2+ is remarkable.
     通过F显著性检验得知,Fe3+、Mn2+的作用是显著的。
短句来源
     OR = 1.48, 95% CI (1.03-2. 24), Q = 2. 89, V = 8, P> 0.05. Statistics from 7 papers revealed the mean survival rate of TCM group was 335. 4 days, that of chemotherapeutic group 231. 8, test of significance P = 0. 1489. MA results showed that the features of TCM treatment on NSCL were: high stability, low effectiveness, however, with certain dominance.
     化疗组有效率OR=1.48,95%CI(1.03~2.24),Q=2.89,V=8,P>0.05。 统计7篇文献中位生存期,中医药组平均335.4天,化疗组231.8天,显著性检验P=0.1489。
短句来源
     Results The test of significance between two methods was P>0.05, the coefficient of correlation was r=0.7752, the test of significance was P<0.01, the equation of linear regression between the GB method(X) and the manual method() was =1.1623X+0.0008, the test of significance of coefficient of regression was P<0.01.Conclusion Two kinds of methods had no significant differences.
     结果两方法间显著性检验P>0·05,相关系数r=0·7752,其显著性检验P<0·01; 国标法(X)与手册法(Y^)间的回归方程为^Y=1·1623X+0·0008,回归系数的显著性检验P<0·01。
短句来源
     Using Excel regression analysis system, the method of stepwise analysis and test of significance, this paper has established the regression relation between the collapsible coefficient and some physical properties(w, e_0, γ) for various units in Xi'an region.
     通过Excel回归分析系统和逐步回归分析方法,利用显著性检验,建立了西安地区不同地貌单元湿陷性土湿陷系数与物理指标(w,e0,γ)之间的相关关系,并进行了指标间的多重共线性检验。
短句来源
     The correlation coefficient R and test of significance (F) showed that r was closely related to Sr. The average absolute error of the 102 radii of positive ions was only 0.9 pm with the representative radii of ions, the relative error was 1.1%.
     从相关系数R和回归方程的显著性检验(F)都说明r与S_r密切相关,其中102种阳离子半径数据与具有代表性的离子半径参考值相比平均绝对误差仅0.9pm,相对误差1.1%.
短句来源
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  显著性测验
     A Test of Significance of the Difference between a Small Percentage and 0%
     出现0%的差异显著性测验
短句来源
  “test of significance”译为未确定词的双语例句
     According to statistically analysis of orthogonal experiment results and test of significance level of each factor,optimum conditions for the synthesis of tetrachlorophthalic anhydride by chlorina- ting phthalic anhydride with chlorine gas were obtained,which were as follows:reaction time 12 h,temperature from 80 ℃ to 160 ℃,1∶10∶B 1∶C 2 material molar ratio of phthalic anhydride,industrial solvent,catalyst and chlorine gas.
     通过正交试验及对正交试验结果进行统计分析 ,检验了因子的显著性 ,确定了由苯酐氯化合成四氯苯酐的最佳工艺条件为 :反应时间 12h ,反应温度 80~ 16 0℃ ,原料配比为n(苯酐 )∶n(工业级溶剂 )∶n(催化剂 )∶n(氯气 ) =1∶10∶B1∶C2 ,在此条件下摩尔产率为 98%。
短句来源
     S-benzyl-L-cysteine can be synthesized by benzyl bromide and L-cysteine. According to statistically analysis of orthogonal experiment results and test of significance level of each factor,optimum condition for the reaction were obtained,which were as follows: reaction time 2.5h,temperature 45℃,1:1 material molar ratio of benzyl bromide and L-cysteine.
     由溴化苄和L-半胱氨酸直接合成S-苄基-L-半胱氨酸,通过正交试验及统计分析,检验了各影响因子的显著性,确定了最佳工艺条件为:反应时间2.5h,反应温度45℃,原料配比n(溴化苄):n(L-半胱氨酸)=1:1。
短句来源
     Checked by test of significance, the t value of the data is 3.733, i.e. P<0.01, indicating that the difference is highly significant statistically.
     数据经统计学处理,t值为3.733,即P<0.01,表明具有非常显著性差异。
短句来源
     The test of significance showed that under the 99.9% confidence level, the linear correlation of COD and BOD 5 was notable.
     并经相关系数显著性水平检验,表明在99 9%的置信水平下COD和BOD5线性相关非常显著。
短句来源
     6. Statistical analytic methods: the software package of SPSS 10.0 is used for the test of significance.
     6.统计分析:采用SPSS 10.0软件包。
短句来源
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  test of significance
Comparative study between composites of these two categories is made using students t-test of significance.
      
Comparative study is made using Students t-test of significance.
      
It is, moreover, possible to devise a test of significance for this measure so that one can test whether a predicted assignment is significantly different from what one, might have observed on the basis of chance observation.
      
Information about the use of various treatment methods was correlated with sociodemographic characteristics, and the chi-square test of significance was applied to selective findings.
      
Such a function provides a statistical test of significance.
      
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An investigation was made in the field at Canton,Tung Shing,Fang Shang,Kwangtung from 1957 to 1958 to determine the degree of accuracy of threemethods for sampling the populations of plants injured by rice stem borers.It was found that under the conditions of the different densities of cultivatedplants,different degrees of insect damage,and different species of rice stemborers,the results obtained with the parallel line sampling method appeared tobe more accurate than with other two methods.Test of significance...

An investigation was made in the field at Canton,Tung Shing,Fang Shang,Kwangtung from 1957 to 1958 to determine the degree of accuracy of threemethods for sampling the populations of plants injured by rice stem borers.It was found that under the conditions of the different densities of cultivatedplants,different degrees of insect damage,and different species of rice stemborers,the results obtained with the parallel line sampling method appeared tobe more accurate than with other two methods.Test of significance of thesedata,the average of value was 0.6639.Statistical examination also showed thattwo hundred samples per field gave sufficiently high degree of accuracy.

对几种螟害调查取样方法进行比较试验,并研究必要的样本数目。在不同栽植密度、不同螟害种类和螟害程度的田块中,一致麦示平行线取样法螟害率平均数的代表性误差最小,平均仅0.1,变异系数亦最小,平均23.56%,显著性测定结果:t 值亦最小,平均为0.6639,与对照的差异最小,可见平行线取样方法具有最大的准确程度。对角线和棋盘式取样法均显著差于平行线取样法,这两种取样法之间,基本上没有明显的差别。将样本数由240丛减少至120丛的平行线取样结果:240丛表现了明显的准确度;120丛在经验值螟害率0.8%以下的密度内,显现得很不准确;而在螟害率0.8%以上的密度尚勉强可用。根据大数定律原理,从理论上算出192丛即能满足所要求的准确度。根据试验结果,认为可以把目前螟害调查办法中的样本数240丛改为200丛。

Percentage is one of the most common indices employed in medical research. It is not desirable to apply the general formulas for the test of significance of the difference between two pro-portions, p_1-p_2, when p_1(or q_1)=0 and N_p(or N_q)<10 implying n_1 p_1(or n_1 q_1)<5, where N is the sum of the individuals of the samples, i.e.N=n_1+n_2, and p=(n_1 p_1+n_2 P_2)/N.A problem arises, here in this paper: If there is a random sample N from a population, of which r individuals have the characteristic A,when...

Percentage is one of the most common indices employed in medical research. It is not desirable to apply the general formulas for the test of significance of the difference between two pro-portions, p_1-p_2, when p_1(or q_1)=0 and N_p(or N_q)<10 implying n_1 p_1(or n_1 q_1)<5, where N is the sum of the individuals of the samples, i.e.N=n_1+n_2, and p=(n_1 p_1+n_2 P_2)/N.A problem arises, here in this paper: If there is a random sample N from a population, of which r individuals have the characteristic A,when a subsample f is drawn from the N indi-viduals, what is the probability of the event for all the r individuals possessing A to happen to fall into the subsample f? For N individuals taken r at a time, the number of all the possible combinations is (); and for f individuals ta-ken r at a time, the number of all the possible combinations is ( ). Thus, the probability of the event that all the r individuals possessing A happen to fall into the subsample f is P= (Ⅰ)or P=(Ⅱ)When both N and f are large, the following sim-plified formula can be used: P≤()~r (III) Practically, when r<10 and f>10r, the value of(f/N)~r is very close to the exact value of P.This value of P is of one tail, that is to say,the 5% level of significance used for a two-tail test will be 0.025, if these formulas are emp-loyed.Ex. 1. N=100, f=23, r=2.According to (III),P<(23/100)~2=0.053.Since f=23 is larger than 10r=20, we can esti-mate that the exact value of P is very close to 0.053, in other words, that P is larger than 0.025. By (II) we know exactly P=0.051>0.025.If the general formula, T=(p_1-p_2)/), was applied, the value of P (two-tail)would be lower than 0.01, a misleading result. Ex. 2, N=250, f=140, r=8.According to (III),P<(140/250)~8=(0.56)~8.The value of n~r can be easily found in the Bar-low's Table. Thus, we get P<0.0097<0.025.When f is less than 10r, the exact value of P can be found easily according to (I) by using the table of logarithms of binomial coefficient,1g(), and the table of logarithms or antilog-arithms.Thus, this method is the simplest and also reliable one for the test of significance between a small percentage and 0%. Notwithstanding that such a problem may also be treated other-

本文提供了正确处理题目所指问题的简法,并和其他方法作了比较,认为所提供的方法是现有处理这类数据的方法中最简便的一个,而且是比较可靠的。不愿推敲其数学原理的读者可以直接通过例题掌握方法。文中还指出了处理这类数据时可能发生的错误。

A spatial pattern for aphid population during the cotton seedling stage is in agreement with the negative binomial distribution when the percentage of cotton plants infested by the cotton aphid (Aphis gossypii Glover) is less than 5% and it conforms with the Polya-Eggenberger''s contagious distribution when the rate of infestation reached more than 5%. In view of this, we chose the effective period for chemical control at the stage of 20% of infestation.Since there were some difficulties arising from nonnormality...

A spatial pattern for aphid population during the cotton seedling stage is in agreement with the negative binomial distribution when the percentage of cotton plants infested by the cotton aphid (Aphis gossypii Glover) is less than 5% and it conforms with the Polya-Eggenberger''s contagious distribution when the rate of infestation reached more than 5%. In view of this, we chose the effective period for chemical control at the stage of 20% of infestation.Since there were some difficulties arising from nonnormality of error distribution, unequality of the group variance, and or non-additivity of the various effects, and since the original survey data from this investigation on aphid control were not satisfied with the assumptions for the analysis of variance, they must be transformed logarithmically into new values. This normalizing transformation will improve the accuracy of the test. The logarithmic transformation not only accommodates the experience in agricultural and biological experiments, but also conforms with the three basic assumptions underlying the analysis of variance procedure and the related tests of significance. The three basic assumptions are: (1) the experimental error should be normally distributed, (2) all the treatment groups must have the same error variance; and (3) treatment and environmental effects ought to be additive.When the sequential analysis is used to test the right time for controlling aphids, we suggest to give k=0.4, kp1=0.2 kp0=0.1, α=β=0.05, and to formulate two parallel linear equations for acceptance (am=0.143m - 5.7625) and rejection (rm = 0.143m + 5.7625) in carrying out the control measures. Because of its useful saving of labour and materials, these two equations are referable for practical application.

棉苗期棉蚜群的空间模型,当蚜株率在5%以下时符合负二项分布,蚜株率在5%以上则符合Polya-Eggenberger核心分布,在防治上应消灭于这个点片发生阶段。 根据这种极不均衡的分布型,在防治试验的调查资料应用变量分析时,应将原资料用对数代换后进行,可以得到比较精确的结果,与生产实践经验相符;也符合变量分析主要基本假设: (1)各种试验误差应成常态分布; (2)各次观察误差必须有一共同的变量; (3)处理效应与环境效应应该是可加的。 应用序贯分析检定棉蚜防治适期(蚜害株20%),定k=0.4、kp_1=0.2、kp_0=0.1、α=19=0.05,求出决定防治与否的两条分领域的平行线方程为: a_m=0.143m-5.7625 r_m=0.143m+5.7625它们可供实践中参考运用,以节约人力物力。

 
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