立体化EST英语教材体系初探

众多专家学者指出,大学英语教学的中心应逐渐从通用英语向专业英语转移,以着力培养学生的英语工作能力作为专业英语规模最大,内容最丰富的一个分支,科技英语教材的建设和发展关系到专业英语教学改革的成败。通过对部分高校科技英语教材使用情况的调查,分析了目前高校EST（English for Science and Technology）英语教材建设中存在的问题：教材选材过难、形式单一、不能利用先进的网络学习环境。针对这些问题,提出了建设包括分级课本、多媒体光盘和网络学习平台在内的立体化EST教材体系的构想,并提出EST教材编写的具体建议。     

Identifying Nonlinear Relationships in Regression using the ACE Algorithm

This paper introduces an alternating conditional expectation (ACE) algorithm: a non-parametric approach for estimating the transformations that lead to the maximal multiple correlation of a response and a set of independent variables in regression and correlation analysis. These transformations can give the data analyst insight into the relationships between these variables so that this can be best described and non-linear relationships uncovered. Using the Bayesian information criterion (BIC), we show how to find the best closed-form approximations for the optimal ACE transformations. By means of ACE and BIC, the model fit can be considerably improved compared with the conventional linear model as demonstrated in the two simulated and two real datasets in this paper.     

“农超对接”供应链的治理模式和专用性投资激励研究

针对目前我国农户加入“农超对接”供应链意愿不足这一现实问题,首先,分析“农超对接”供应链的不完全契约特征;其次,构建了三种不同治理模式的数学模型,对比农户最优专用性投资水平的差异;最后,建立事后再协商的讨价还价动态博弈模型,研究影响农户专业性投资水平的因素。研究表明：以激励农户提高专用性投资水平作为标准,事后再协商模式将比事后不协商模式更具优势;如果农户预期到自己在事后再协商中会面临被“敲竹杠”的风险,将会降低事前的专用性投资水平;可以从改造农超双方不平衡的上下层结构关系入手,来激励农户提高专用性投资水平。     

法律原则的效力标准——基于系谱抑或内容?

法律的效力是法律存在的标志,因此法律原则的效力标准就是法律原则在本体论意义上的存在条件。德沃金主要借由法律原则在个案适用时相对于法律规则的特点,认定法律原则与规则之间的逻辑差异。然而,并不能由此简单地说法律原则的效力标准只是基于内容或道德论证的。实际上,同样存在基于系谱或来源的法律原则。同时,如果将法律原则的存在与其在个案中的适用剥离开来,则法律原则的存在即便需要借助道德论证,这种论证的过程本身也有可能是基于来源或系谱的。因此,法律原则与法律规则在本体论上的差异不应该被夸大。     

Some complex variable transformations and exact power comparisons of two-sided tests of equality of two Hermitian covariance matrices

Power studies of tests of equality of covariance matrices of two p-variate complex normal populations σ₁ = σ₂ against two-sided alternatives have been made based on the following five criteria: (1) Roy's largest root, (2) Hotelling's trace, (4) Wilks' criterion and (5) Roy's largest and smallest roots. Some theorems on transformations and Jacobians in the two-sample complex Gaussian case have been proved in order to obtain a general theorem for establishing the local unbiasedness conditions connecting the two critical values for tests (1)–(5). Extensive unbiased power tabulations have been made for p=2, for various values of n₁, n₂, λ₁ and λ₂ where n₁ is the df of the SP matrix from the ith sample and λ₁ is the ith latent root of σ₁σ^-1₂ (i=1, 2). Equal tail areas approach has also been used further to compute powers of tests (1)–(4) for p=2 for studying the bias and facilitating comparisons with powers in the unbiased case. The inferences have been found similar to those in the real case. (Chu and Pillai, Ann. Inst. Statist. Math. 31.     

专门用途英语网络化教学策略研究

信息技术条件的日益成熟和建构主义学习理论的不断完善为大学英语的内容依托式网络化教学提供了技术支持和理论基础。网络所具有的各种优势使人们对新技术、新教学模式的推广充满了信心。事实上,教师的观念转变、网络课堂的实际操作过程转换、学生的自主学习能力培养都不能一蹴而就。认知理论和建构主义理论同样证明：作为全人教育的一部分,内容依托式网络化大学英语课堂教学强调教学材料丰富、学生自主学习方式的同时,决不能忽视师生之间最基本的情感交流,忽略学生认知能力培养和健康人格的发展。     

英汉法律翻译教学面面观

英汉法律翻译作为特殊用途翻译（Translation for Specific Purpose,TSP）目前日益受到关注。文章结合教学实践经验,对法律翻译的特殊性、教学目标、师资队伍建设、教材建设以及教学方法等方面进行了尝试性探讨。同时指出,法律翻译教学是一项系统性工程,需要围绕教学的方方面面予以全面的研究,并在此基础上提出了相应的策略。     

论科学领域中的价值因素

科学领域渗透着价值因素 ,对科学理论不仅要做真理评判 ,同时也要做价值评判。价值评判的一般标准是 :科学理论能否满足价值主体的某种需要以及在多大程度上满足这种需要 ,终极标准是 :科学理论能否满足人的全面发展需要以及在多大程度上满足这种需要。价值评判具有两大功能 :其一是对科学理论的选择功能 ,其二是对科学家科学研究行为的规范功能。     

On intra-class correlation coefficient estimation

Consider the problem of estimating the intra-class correlation coefficient of a symmetric normal distribution. In a recent article (Pal and Lim (1999)) it has been shown that the three popular estimators, namely—the maximum likelihood estimator (MLE), the method of moments estimator (MME) and the unique minimum variance unbiased estimator (UMVUE), are second order admissible under the squared error loss function. In this paper we study the performance of the above mentioned estimators in terms of Pitman Nearness Criterion (PNC) as well as Stochastic Domination Criterion (SDC). We then apply the aforementioned estimators to two real life data sets with moderate to large sample sizes, and bootstrap bias as well as mean squared errors are computed to compare the estimators. In terms of overall performance the MME seems most appealing among the three estimators considered here and this is the main contribution of our paper. Formerly University of Southewestern Louisisna     

企业信息资源适用标准研究

信息资源是企业重要的战略资源。本文简要叙述了目前我国企业信息资源开发利用现状及其产生信息资源利用率低的原因 ,综合分析了构建企业信息资源适用标准的必要性 ,提出了七项规范企业信息资源的适用标准 ,即有效性、效率性、保密性、完整性、可用性、可靠性和符合性标准