基于使用的语言理论模型述评

通过对基于使用的语言理论模型的述评,阐述了语言知识的获得与语言的使用有着密不可分的关系,说明该理论模型对于具体语言现象有一定的解释力,同时指出了它所面临的来自其他认知研究领域的挑战。     

二语学习者词汇习得的回避现象探析

二语学习者在英语学习的过程中普遍存在着对某些词汇的回避现象,主要是回避某些短语动词、搭配词的使用很贫乏、语义回避很明显、回避意义不合理的多义词等。词块教学是解决词汇回避现象的有效措施。     

What Recent Reviews Tell Us About the Efficacy of Reading Interventions for Struggling Readers in the Early Years of Schooling

An analysis of large and influential published reviews of research pertaining to the reading acquisition of young struggling readers in the early years of schooling was undertaken. The reviews were selected on the basis that they either had been commissioned by federal governments or had been conducted by reputable research institutions and had been released in the past 10 years. A search of published literature pertaining to the topic found three federal reviews (from the United States, the United Kingdom and Australia), a What Works Clearinghouse Report into beginning reading programmes, a review of reading interventions by Slavin et al. and a synthesis of meta-analyses by Hattie. Analysis of these reviews indicated that there are key commonalities in findings about how to teach reading to young students. Reviews of interventions revealed some flaws and therefore provide limited information useful to programme implementation and development for young struggling readers.     

基于DSP的图像无线传输系统设计

介绍了基于DSP的无线图像传输系统设计,系统能够对图像进行采集、压缩及无线传输。概述了系统的设计过程,重点讨论了DSP中的DMA在图像采集和JPEG图像压缩过程中的应用,系统适用于远程实时监控、工业控制和智能家居等环境。     

高校图书馆精细化采访研究

本文分析了目前高校图书馆采访工作存在的问题,并将精细化管理理论引入图书馆采访工作中,以为采访工作提供新的方向。     

吉林大学图书馆开展网络图书荐购服务前期工作探讨

图书馆馆藏的建立除了应由采访人员负责选书之外,还应该积极鼓励读者参与。在当今网络时代,基于网络的图书荐购服务成为很多图书馆的选择。吉林大学图书馆在开展此项服务之前对开展图书荐购服务的背景、需求、运行模式、系统功能需求等问题进行了深入的分析和探讨,初步确定了开展图书荐购服务的工作方案。     

基于GPRS的三峡库区水位监控系统设计

长江三峡工程是一个利国利民的大工程,影响和制约着当地国民经济的可持续发展。本文针对长江三峡库区水位测量与控制,提出了一种基于GPRS的水位监控系统。本系统分为监控中心和测量终端。测量终端采用液位传感器,将液位传感器接上线缆后沉入水底,将测出来的水压信号转变成电信号通过电缆传输到测量终端CPU,CPU将此数据转换为水位高度后通过GPRS网络以数据报的形式传输到监控中心实时显示出来。如果水位高度超出阈值,监控中心将发出报警信息通知监控人员以便及时作出处理。     

R&D溢出、谈判能力与企业技术获取

考虑R&D溢出、企业谈判能力的影响,将企业独立研发、合作研发和技术引进统一到一个两阶段R&D/产品模型下进行考察,分析企业选择不同技术获取方式的条件及其对社会福利的影响.研究发现,当技术溢出水平较低时,具有一定谈判能力的企业存在技术引进动机;当技术溢出水平较高时,企业会选择合作研发进行创新,与谈判能力无关.当企业选择技术引进时,产量提成模式下的社会福利水平高于固定费用模式,但低于独立研发时的社会福利水平,并且与企业谈判能力负相关.     

摆脱束缚,从优秀走向卓越——名校长激励的有效策略研究

随着教育事业的不断发展,校长在学校发展中的作用越来越为人们所重视。关于校长的培训和激励研究在不断地深入进行,但其中关于名校长激励的有效策略研究却极少。文章分析了名校长激励的内涵、现状和问题,进而对名校长激励的策略进行研究。     

Method for determining effective flame emissivity in a rotary kiln incinerator burning solid waste

Temperature is the most important parameter for the improvement of combustion efficiency and the control of pollutants. In order to obtain accurate flame temperatures in a rotary kiln incinerator using non-intrusive thermographic method, the effective flame emissivity was studied. A combined narrow- and wide-band model and Mie scattering method were used to calculate the radiative properties for gases and fly-ash particles under different combustion conditions. The effects of the air/waste ratio and fly-ash particles on the effective flame emissivity were discussed. The results of numerical calculations showed that the effective emissivity decreased from 0.90 to 0.80 when the air/waste ratio increased from 1.0 to 1.8, and the effect of the fly-ash particles was ignorable under the conditions discussed in this paper. Experimental measurement results indicated that the accuracy of the thermographic temperature measurements improved significantly if the setting of the flame emissivity was adjusted according to the air/waste ratio.