儿童英语关系从句习得研究：回顾与展望

儿童英语关系从句习得是儿童心理学和儿童教育学研究的重点之一。本文回顾了儿童英语关系从句的习得研究发展历程以及目前存在的问题。相关研究涵盖了儿童语言认知环境,一语习得还是二语学得,各类从句的习得顺序及其影响因素,有标记项目和无标记项目习得的映射作用。文章指出,儿童关系从句认知是否遵循语言类型学普遍原则,在双语背景下母语的作用方式等问题尚未有一致结论。本论文最后总结儿童英语关系从句习得的主要发现,问题和争议,以及研究方法的缺陷,为今后的研究提出建议。     

A Basis Function Approach to Position Estimation Using Microwave Arrays

We consider the problem of estimating the bearing of a remote object given measurements on a particular type of non-scanning radar, namely a focal-plane array. Such a system focuses incoming radiation through a lens onto an array of detectors. The problem is to estimate the angular position of the radiation source given measurements on the array of detectors and knowledge of the properties of the lens. The training data are essentially noiseless, and an estimator is derived for noisy test conditions. An approach based on kernel basis functions is developed. The estimate of the basis function weights is achieved through a regularization or roughness penalty approach. Choosing the regularization parameter to be proportional to the inverse of the input signal-to-noise ratio leads to a minimum prediction error. Experimental results for a 12-element detector array support the theoretical predictions.     

浅议英语教材编写中“学得”与“习得”之关系

通过阐述二语习得中“学得”与“习得”的相关理论，以《新编大学英语》为例，说明英语教材的编写应将两者结合起来，为外语课堂提供良好的习得环境，从而提高学得者学得外语的积极性和创造力，达到更好的学得效果。     

Full-Text Aggregator Database Vendors and Journal Publishers: A Study of a Complex Relationship

Abstract

To acquire journal content rights for full-text aggregator databases, database vendors must enter into negotiations and sign contractual agreements with journal publishers. Through a survey, librarians at the University of Colorado at Colorado Springs examined vendors and publishers relationships and the impact of those relationships on full-text journal content in aggregator services.     

An application of taguchi's methods reconsidered

Two aspects of Taguchi's methods for analyzing parameter design experiments that can be improved upon are considered. It is shown how using interaction graphs instead of marginal graphs, and how using the sample variance instead of a signal-to-noise ratio, can lead to product designs that are more robust to variation. The advantages of the alternative analysis will be illustrated by reanalyzing a case study considered by Barker (1986).     

二语习得中的语言输入输出与大学外语教学

二语习得中的输入输出理论对外语教学具有重要意义。输入与输出不是孤立的,二者是相辅相成,缺一不可的。输入是输出的前提和准备,输出是输入的目的,并能促进输入。只有将二者有机结合,才能促进语言学习者综合语言能力的提高。本文系统地阐述了输入输出理论,并提出它们对外语教学的重要性和意义,笔者提出了几点改善目前我国英语教学中输入与输出脱节的问题的建议。     

连接主义理论视野下的商务英语听力教学

连接主义理论在第二语言习得领域研究的拓展对我国英语教学启示很大。在商务英语教学中引入连接主义理论,能够解决听力教学过程中的难点,改善教学效果和提高商务英语听力水平。     

英语从属结构及其常见错误分析

论文从教学实际出发 ,指出从属结构是中国学生学习英语的习得难点 ,也是制约学生翻译写作水平的重要因素。详细系统地分析了英语从属结构的组成及其特点 ,并对学生的常见错误进行了深入分析 ,以期提高学生在辨错改错翻译写作等方面的实际运用英语语言的能力     

经济转型期的企业家机制:概念、运作及其重构

运用现代经济学与管理学的若干理论，对经济转型期我国企业家机制运行中存在的问题进行分析，在对企业家的定义、企业家与环境的互动关系、企业家机制与企业制度和市场机制的关系进行分析后，针对我国当前企业家机制的重构问题提出了一些原则性建议     

Resilience Analytics with Application to Power Grid of a Developing Region

Infrastructure development of volatile regions is a significant investment by international government and nongovernment organizations, with attendant requirements for risk management. Global development banks may be tasked to manage these investments and provide a channel between donors and borrowers. Moreover, various stakeholders from the private sector, local and international agencies, and the military can be engaged in conception, planning, and implementation of constituent projects. Emergent and future conditions of military conflict, politics, economics, technology, environment, behaviors, institutions, and society that stress infrastructure development are prevalent, and funding mechanisms are vulnerable to fraud, waste, and abuse. This article will apply resilience analytics with scenario‐based preferences to identify the stressors that most influence a prioritization of initiatives in the electric power sector of Afghanistan. The resilience in this article is conceived in terms of the degree of disruption of priorities when stressors influence the preferences of stakeholders, and ultimately a prioritization of initiatives. The ancillary results include an understanding of which initiatives contribute most and least across strategic criteria and which criteria have the most impact for the analysis. The article concludes with recommendations for risk monitoring and risk management of the portfolio of stressors through the life cycle and horizon of grid capacity expansion.