ESA理论在大学英语精读教学中的运用

在大学英语阅读教学中引入英国英语教学专家杰里米·哈默（Jeremy Harmer）的ESA教学模式的三要素（投入-Engage、学习-Study和运用-Activate），通过它们之间顺序的不断变换，创造出多样的教学模式，有效地将传统的以教师课堂讲授为主的活动模式转变为在教师指导下以学生为主体的教学模式，并取得了很好的课堂教学效果。     

Bayesian MCMC Mapping of Quantitative Trait Loci in a Half-sib Design: a Graphical Model Perspective

Graphical models provide a powerful and flexible approach to the analysis of complex problems in genetics. While task-specific software may be extremely efficient for any particular analysis, it is often difficult to adapt to new computational challenges. By viewing these genetic applications in a more general framework, many problems can be handled by essentially the same software. This is advantageous in an area where fast methodological development is essential. Once a method has been fully developed and tested, problem-specific software may then be required. The aim of this paper is to illustrate the potential use of a graphical model approach to genetic analyses by taking a very simple and well-understood problem by way of example.     

IntraLATA long-distance demand: carrier choice, usage demand and price elasticities

Competition in the long-distance market in the US continues to intensify; the 1996 Telecommunications Act has led to increased competition in long-distance telephony especially as the Regional Bell Operating Companies have begun to gain entry to long-haul, long-distance markets. In order to better understand the implications of having increased service offerings, models of how customers choose between carriers (and the impact of this choice on subsequent usage) will be useful. We develop the first publicly available models that simultaneously estimate choice and usage for intraLATA long-distance in the US. Utilizing a generalized Tobit model, the price responsiveness of usage and carrier choice are estimated. The results are generally consistent with expectations both in terms of theory and of practical experience in the industry.     

面向对象程序设计教学改革与实践

指出了面向对象程序设计教学中存在的问题,针对问题提出了改革措施：采用案例式教学,加强实践教学管理,结合BB教学平台辅助教学。不断提高学生学习的自觉性和主动性,成为教学改革的重要研究内容。     

高职院校教学体系改革的思考

高职院校应以培养高级技术应用型专门人才为目标,建立具有自身特色的教学体系。首先要通过广泛的社会调研,了解相应的人才需求,在此基础上制定适宜的教学计划;同时要着力构建与高职教育相适应的教学体系,教学模式与方法尽量适应高职学生的特点和培养目标,加大实践教学的比重,建立设备较先进、具备实训教学功能的综合训练教学基地,加强"双师型"教师队伍建设,以培养出真正符合社会需求的、高质量的技术应用型人才。     

Environmental protection versus economic growth

This paper presents and analyses the differences in the eco-models implemented worldwide （such as whether and how carbon taxes being ＂recycled＂）, or in their efficiency parameters （inconsistent parameter values that account for different results）. This is the assumption that a real tradeoff exists between the production of environmental goods. The present article empirically proves that something must be given up in order to gain something else, and once equations are specified to trace out the path of the economy over time, the natural economic formulation of such equations will embody the notion of economic and bio-tradeoffs.     

中国高职教材建设探析

我国高职教材的建设存在许多问题，影响了高职教育的发展。为了解决这些问题，应该采取端正思想、针对高职特点编写教材、提高编写人员水平、组建教材编写委员会等措施，这样才能促进高职教材建设事业的顺利发展。     

针对大学英语分级教学反对意见的思考

大学英语教学必须适应社会需求,以培养学生的英语综合应用能力为目标,大学英语分级教学具有坚实的理论依据和现实意义。针对本校大学英语分级教学在实践过程中所产生的问题,通过调查和分析,得出了个性化、以人为本的大学英语分级教学思路。     

The adequacy of asymptotic approximations in the near-integrated autoregressive model with dependent errors

We consider the normalized least squares estimator of the parameter in a nearly integrated first-order autoregressive model with dependent errors. In a first step we consider its asymptotic distribution as well as asymptotic expansion up to order O_p(T⁻¹). We derive a limiting moment generating function which enables us to calculate various distributional quantities by numerical integration. A simulation study is performed to assess the adequacy of the asymptotic distribution when the errors are correlated. We focus our attention on two leading cases: MA(1) errors and AR(1) errors. The asymptotic approximations are shown to be inadequate as the MA root gets close to −1 and as the AR root approaches either −1 or 1. Our theoretical analysis helps to explain and understand the simulation results of Schwert (1989) and DeJong, Nankervis, Savin, and Whiteman (1992) concerning the size and power of Phillips and Perron's (1988) unit root test. A companion paper, Nabeya and Perron (1994), presents alternative asymptotic frameworks in the cases where the usual asymptotic distribution fails to provide an adequate approximation to the finite-sample distribution.