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21.
杨建生 《上海理工大学学报(社会科学版)》2016,38(4):338-343
以英语方式副词位置为强化对象,研究输入流、文本强化以及两者结合使用这三种输入强化方式是否能够帮助学习者习得英语方式副词的位置规则,并对其效果进一步深入探讨。实验结果表明:三种输入强化方式都能帮助学生习得方式副词位置规则,但输入强化的有效应用是有条件的,输入强化的效果会受研究中受试者以及被强化的对象等因素的影响。此外,相对于单一强化,复合强化通常更能有效地促进目标语的学习,但当单一强化能有效地促进目标语学习的时候,复合强化不能帮助学习者取得显著性的优异成绩,从而表明复合强化并不总是必要的。 相似文献
22.
张孝荣 《上海理工大学学报(社会科学版)》2020,42(3):226-231
主要阐述最简方案下存活式句法理论的主要内容,并对其优势和不足做出评价。从理论构建以及语言事实分析两个视角来看,与语段理论相比,存活理论更加符合最简句法的基本理念和要求,其理论设计更为合理,语料应用范围更为宽广。除此之外,以存活理论为基础,从核心句法操作、句法特征以及句法与其他语言模块的接口等角度反思最简方案下构建句法推导理论应该注意的问题。 相似文献
23.
Yahia S. El-Horbaty 《统计学通讯:模拟与计算》2018,47(6):1670-1676
We derive an exact F-test for random effects in the nested-error regression model. The derivation utilizes a matrix decomposition that offers a transformation of the response vector into two independent subvectors. When the random effects are absent, the test statistic reduces to a ratio of two independent residual sums of squares that are computed by fitting a regression model using each subvector. A small simulation study compares the power of the F-test with various recent tests and shows that the proposed test has a competitive performance under small as well as large number of clusters. 相似文献
24.
Hui-Hui Sun 《统计学通讯:理论与方法》2017,46(9):4620-4630
Homogeneity of variance is a basic assumption in longitudinal data analysis. However, the assumption is not necessarily appropriate. In this paper, Fisher scoring method is applied to get M-estimator in the exponential correlation mixed-effects linear model. The score tests for heteroscedasticity and correlation coefficient based on M-estimator are then studied. Monte Carlo method is applied to investigate the properties of test statistics. At last, the methods and properties are illustrated by an actual data example. 相似文献
25.
Because outliers and leverage observations unduly affect the least squares regression, the identification of influential observations is considered an important and integrai part of the analysis. However, very few techniques have been developed for the residual analysis and diagnostics for the minimum sum of absolute errors, L1 regression. Although the L1 regression is more resistant to the outliers than the least squares regression, it appears that outliers (leverage) in the predictor variables may affect it. In this paper, our objective is to develop an influence measure for the L1 regression based on the likelihood displacement function. We illustrate the proposed influence measure with examples. 相似文献
26.
曾莉 《广州大学学报(社会科学版)》2010,9(7):79-82
从词义、句法位置、重新分析三个方面对“为”的语法化过程进行考察,可以发现,“为”的语法化是“为动”双宾语句消失的主要原因。动词“为”在词义泛化的基础上,由于句法位置和组合功能的变化而最终失去其原来的动词意义和在句子的核心谓词地位,虚化成表引进服务对象的介词,从而导致其双宾语结构的消失,形成新的“介·宾·动”结构。 相似文献
27.
This article discusses the consistent estimation of the parameters in a linear measurement error model when stochastic linear restrictions on regression coefficients are available. We propose some methodologies to obtain the consistent estimation when either the covariance matrix of the measurement errors or the reliability matrix of independent variables is known. Their finite- and large-sample properties are derived with not necessarily normal errors. A Monte Carlo simulation is carried out to study the the finite properties of the estimators. 相似文献
28.
《Journal of Statistical Computation and Simulation》2012,82(10):1281-1296
For longitudinal time series data, linear mixed models that contain both random effects across individuals and first-order autoregressive errors within individuals may be appropriate. Some statistical diagnostics based on the models under a proposed elliptical error structure are developed in this work. It is well known that the class of elliptical distributions offers a more flexible framework for modelling since it contains both light- and heavy-tailed distributions. Iterative procedures for the maximum-likelihood estimates of the model parameters are presented. Score tests for the presence of autocorrelation and the homogeneity of autocorrelation coefficients among individuals are constructed. The properties of test statistics are investigated through Monte Carlo simulations. The local influence method for the models is also given. The analysed results of a real data set illustrate the values of the models and diagnostic statistics. 相似文献
29.
Poduri S.R.S. Rao 《统计学通讯:理论与方法》2013,42(15):1659-1669
The MINQUE and its modifications are considered for estimating the variances of the balanced one-way random effects model. The effects of the a priori values on the estimators of the variances are examined in detail. The Mean Square Errors of the estimators are compared for variations in the prior values of the unknown variances. 相似文献
30.
在“S +V +R +O”句式中 ,由于述语中心动词V价的不同、宾语的不同 ,补语R语义指向的不同 ,主语S、述语V、补语R、宾语O构成一个复杂的语义网络。弄清楚其中的语义网络 ,就可以着手建立“S +V +R +O”双核谓词格框架了。建立双核谓词格框架 ,可以促进对句子的理解 ,促进现代汉语格系统的建立 相似文献