反垄断执法机关和产业监管机关职能划分的考察维度

我国《反垄断法》对于如何协调反垄断执法机关与产业监管机关之间的职能处于缺位状态,激化了二者在实践中的矛盾。在当前国情下,产业监管机关的存在有其合理性,二者之间实行合作模式有助于调和产业政策与竞争政策的关系。在考察具体职能划分时,需充分结合静态、动态及个别考察维度,既发挥二者各自的优势特点,又结合历史发展的具体阶段以及个案存在,最终实现提高效率的目的。     

An Evaluation of Simulations in Developmental Disabilities (SIDD): Instructional Software that Provides Practice in Behavioral Assessment and Treatment Decisions

ABSTRACT

Simulations in Developmental Disabilities (SIDD) is a multimedia computer program designed to provide undergraduate psychology students with practice in making assessment and treatment decisions. Eighteen undergraduate psychology students participated in an experiment to test the instructional effectiveness of SIDD. Post-test scores were significantly higher in the experimental group who received training with SIDD than in a control group who did not receive training. The students also rated the software positively. Future strategies to further evaluate the software are discussed.     

我国翻译质量评价研究的现状与趋势

翻译质量评价研究在我国译学研究中已经走过了相当一段路程,并取得了不小的成绩。论文围绕我国翻译质量评价之歧路、西方翻译评价理论在中国之引介、翻译质量评价新动向等方面对国内翻译质量评价研究的现状进行梳理,以期对我国的翻译质量评价研究提供参考。作为译学研究的重要组成部分,功能语言学为翻译质量评价提供了强大理论基础,语料库研究为其提供了可资借鉴的实证研究路径,将这二者结合或可使翻译评价研究走出一条新路。     

Applications and asymptotic power of marginal-free tests of stochastic vectorial independence

Fully nonparametric tests for the independence between random vectors are studied in this paper. The test statistics are functionals of an empirical process defined as the difference between the joint empirical copula and the product of the empirical copulas associated to the vectors that are suspected to be independent. The validity of a weighted bootstrap procedure is established, which allows for a quick computation of p-values. A special attention is given to the asymptotic behavior of the tests under contiguous sequences of distributions. Finally, a characteristic of the copulas in the Archimedean class in terms of independence of vectors is exploited in order to propose a new goodness-of-fit procedure.     

晏几道词中的雁意象研究

雁意象是我国古代文学作品中常见的意象之一,它可以用来寄托相思之情,喻指男女恋情,也可以用来表达人们的离别怀旧之情,还可以用来表现古人的时间意识,甚至是边塞风情等种种情思.叔原亦不例外,而喜用雁意象,来展现自己深层的内心世界.     

Bootstrap confidence bands for the CDF using ranked-set sampling

In ranked-set sampling (RSS), a stratification by ranks is used to obtain a sample that tends to be more informative than a simple random sample of the same size. Previous work has shown that if the rankings are perfect, then one can use RSS to obtain Kolmogorov–Smirnov type confidence bands for the CDF that are narrower than those obtained under simple random sampling. Here we develop Kolmogorov–Smirnov type confidence bands that work well whether the rankings are perfect or not. These confidence bands are obtained by using a smoothed bootstrap procedure that takes advantage of special features of RSS. We show through a simulation study that the coverage probabilities are close to nominal even for samples with just two or three observations. A new algorithm allows us to avoid the bootstrap simulation step when sample sizes are relatively small.     

Comments

In this paper we compare Bartlett-corrected, bootstrap, and fast double bootstrap tests on maximum likelihood estimates of cointegration parameters. The key result is that both the bootstrap and the Bartlett-corrected tests must be based on the unrestricted estimates of the cointegrating vectors: procedures based on the restricted estimates have almost no power. The small sample size bias of the asymptotic test appears so severe as to advise strongly against its use with the sample sizes commonly available; the fast double bootstrap test minimizes size bias, while the Bartlett-corrected test is somehow more powerful.     

Recent and classical goodness-of-fit tests for the Poisson distribution

We give a critical synopsis of classical and recent tests for Poissonity, our emphasis being on procedures which are consistent against general alternatives. Two classes of weighted Cramér–von Mises type test statistics, based on the empirical probability generating function process, are studied in more detail. Both of them generalize already known test statistics by introducing a weighting parameter, thus providing more flexibility with regard to power against specific alternatives. In both cases, we prove convergence in distribution of the statistics under the null hypothesis in the setting of a triangular array of rowwise independent and identically distributed random variables as well as consistency of the corresponding test against general alternatives. Therefore, a sound theoretical basis is provided for the parametric bootstrap procedure, which is applied to obtain critical values in a large-scale simulation study. Each of the tests considered in this study, when implemented via the parametric bootstrap method, maintains a nominal level of significance very closely, even for small sample sizes. The procedures are applied to four well-known data sets.     

Dependence Estimation Over a Finite Bivariate Failure Time Region

This articleconcerns nonparametric estimation of association between bivariatefailure times. In the presence of independent right censoring,the support for failure time variates may be restricted and measuresof dependence over a finite failure time region may be of particularinterest. To this end, the reciprocal cross ratio function, weightedby the bivariate failure time density, is proposed as a summarymeasure of dependence over a failure time region. This `relativerisk' estimator is shown to be consistent and asymptoticallynormally distributed, with consistent bootstrap variance estimator.A finite-region version of Kendall's tau, which is suitable forcensored failure time data, is also proposed, and correspondingasymptotic distribution theory is noted. The accuracy of theseasymptotic approximations is studied in simulations and an illustrationis provided.     

我国三种野生稻及两个栽培稻品种叶片表面亚显微结构的观察研究

用扫描电钻对原产中国的3种野生稻、2个栽培稻品种就气孔频度、气孔器孔突、大瘤状乳突及木栓细胞乳突等叶片表面亚显微结构作了比较观察研究。结果显示这些性状具有种的特异性,并且其相似程度与亲缘关系远近有关。