Undesirable economic growth via agents’ self-protection against environmental degradation

Our model analyzes the effects of the interplay between environmental degradation and consumption choices on economic growth dynamics and on economic agents’ welfare. We show that if private goods can be consumed as substitutes for environmental goods, then economic growth may be fueled by environmental deterioration. In this context, undesirable economic growth may occur, characterized by an inverse correlation between aggregate capital accumulation and economic agents’ welfare.     

LED产业集群中资源优化组织的关键路径——基于产业链创新协同平台视角

以提升LED产业集群中资源组织效率为目的,基于产业链创新服务平台视角,从产业链平台的业务流程出发,寻找资源组织的关键路径。基于提升资源组织速度的考虑,使用包括基本信息层、结构信息层、活动信息层、能力信息层和时间信息层的5层资源描述方法构建LED产业平台中虚拟单元。通过LED产业链平台中的应用,证明本方法在实践中是有效的。     

唐山城乡居民消费对经济增长影响差异化的实证分析

作为多年来经济总量位居河北省第一位的唐山市,这几年国民经济得到了飞速发展,消费需求总量的逐步扩大在一定程度上对经济增长的拉动起到了举足轻重的作用。本文建立了城乡居民消费水平与唐山经济增长关系的误差修正模型,研究表明唐山城乡居民消费对其经济增长有正向拉动作用,城镇居民消费的拉动作用比农村居民的要大。因而,采取措施缩小城乡居民消费的差距,统筹二者的发展,是唐山完成两个"率先"的目标、建成全面小康社会不得不面对的问题。     

WTO与农民收入增长研究

本文通过定性分析和定量计算，找到影响农民收入增长的最重要因素；结合WTO《农业协议》及我国农业资源变化趋势和中国人口实际，提出逐步加大财政支农力度及区别对待；加强农业和农村经济发展的宏观调控，结合各地实际，分类指导；采取灵活的土地承包政策，实现土地规模经营，提高土地的产出率等一系列增加农民收入措施。     

Externalities, technological complementarities and sustained economic growth

Externalities as conventionally defined miss many of the spillovers that are both causes and consequences of the technological changes that underlie economic growth. We introduce a much wider concept called technological complementarities. New general purpose technologies (GPTs) rejuvenate the growth process by creating technological complementarities, which are adequately measured neither by total factor productivity (TFP) nor by externalities. There would be major gains from technological change even if the returns on capital invested in innovation never exceeded the returns on investing in existing technologies so that there were neither externalities nor positive changes in TFP.     

Potential production simulation and optimal nutrient management of two hybrid rice varieties in Jinhua,Zhejiang Province,China

Potential growth of two widely-grown hybrid rice varieties in the Jinhua district of Zhejiang Province, Shanyou63 for mid-rice and Xieyou46 for late rice, was simulated using a crop growth model of WOFOST. Parameters of the rice growth in WOFOST were calibrated through field experiments from 1999 to 2002 in Jinhua. The potential yield simulated with WOFOST was about 12 t/ha for Shanyou63 and 10 t/ha for Xieyou46, which are in good agreement with the highest recorded yield obtained in this area. Under farmers practice, current yield is about 7.5 t/ha for Shanyou63 and 6.5 t/ha for Xieyou46. There is a gap between the actual rice yield and the potential yield for these two hybrid rice varieties grown in this area. The attainable target yields were set to 70% to 75% of their potential yields for the two varieties. A recently developed software ＂Nutrient Decision Support System （NuDSS）＂ for irrigated rice was used to optimize nutrient management for these two rice varieties. According to NuDSS, the optimal fertilizer N requirement for the target yields was about 150 kg/ha for Shanyou63 and about 120 kg/ha for Xieyou46, which were only about 70% of the fertilizer N application under current farmers＇ practice. Comparing with farmers＇ practice, there is great potential to increase actual rice yields and to reduce fertilizer N use rates by improving rice crop management practice in Jinhua.     

批评话语分析中的隐喻现象研究——以腾讯QQ致用户信为例

批评话语分析（critical discourse analysis）作为语言学中新兴发展的学派,其主要目的是通过分析人们设计的符号来揭示语篇中含而不露的意识形态。隐喻（metaphor）作为认知语言学中的一个重要理论,近年来受到国内外学者的广泛关注。隐喻与社会性之间的关系在某种程度上把认知理论与批评话语分析结合起来,使构建认知批评话语分析框架成为可能。本文以分析CDA中的隐喻现象为基点,旨在探讨构建认知批评话语分析框架的可行性与优势;发掘大众语篇背后隐藏的意识形态并呼吁读者以批评的眼光阅读此类语篇。     

教学临界阈研究的问题与思路

教学临界阈研究是探究和揭示教学有效性内在本质及其规律的关键,是我们对有效教学问题从外条件研究到内问题探讨的转折点。这些内问题的探讨主要包括学习者的有效学习量究竟是多少才能引起学习临界点的出现,影响教学从量变到质变的关键因素是什么,教学临界阈的产生能否促使学习者知而达智、行而致能。超额学习、掌握学习、语言输入理论、结构方程模式等成果为教学临界阈的研究奠定了基础,人类工效学、知识生态学和博弈论更是为教学临界阈研究提供了多元视角。时间、空间、群体和影响程度等质变临界阈的存在意味着教学临界阈研究有着不同的研究思路,而具体内容学习变化的曲线则是判断教学临界阈的基本依据。通过变量干预而改变教学临界状态是研究有效教学的一个新的切入点。     

中国旅游服务贸易的经济增长效应——基于省际面板数据的实证分析

方法:利用2004-2008年度我国31个省份各地区国内生产总值和旅游业的面板数据,选取中国各地区国际旅游(外汇)收入作为影响我国经济增长的衡量指标。目的:研究各地区旅游服务贸易对我国经济增长的影响。结论:我国各地区的资本存量、劳动力投入、人力资本和各地区国际旅游(外汇)收入对我国的经济增长都有显著的影响。     

研究型教师：被丰富的教师专业成长内涵与实践

20世纪80年代以来,关于研究型教师内涵的实践解读与理论解读日趋丰富多彩,研究型教师也成为我国教师专业化发展过程重要的概念之一。这一概念的历时发展,揭示出教师专业成长中的多方面内涵：即解读研究型教师内涵感性路径、理性路径之间的转化,拓展了教师专业化的发展路径;对研究型教师内涵及其实践的多元化解读,构建了教师专业成长可持续性的、综合化的发展;对教师专业素养的再塑造,丰富了教师专业的实践内涵;教师对研究型态度的再选择,满足了教师重建职业实践意义的现实需求。