加快电网智能化建设，打造资源优化配置平台

结合国外电网发展特点,分析了国外发展智能电网的主要动因及发展趋势。从经济社会发展、跨区资源配置、清洁能源发展、优化终端能源消费结构和提升能源安全等方面分析了未来我国电网发展面临的形势和要求。结合我国国情,提出未来我国需要加快电网的智能化建设,打造坚强的资源优化配置平台。     

追踪与借鉴：探究智能电网的发展目标与途径

智能电网对于保障安全、优质、高效的电力供应,发展清洁能源、应对气候变化、解决能源短缺和环境保护等问题具有重大意义。首先介绍了国外智能电网的定义、发展动因及最新认识,从战略框架、激励政策的出台与行业参与、标准制定、国际合作4个方面,综述了国外智能电网的总体发展情况。之后分析了中国发展智能电网的目标,就我国发展智能电网应重点关注的方面提出了几点建议。     

世界核电发展及对我国的启示

介绍了我国核电装机、核电技术、核电政策等方面的发展情况;未来我国广阔的核电发展空间及形势;世界核电装机发展、主要国家核电装机、核电技术进步等情况。总结了世界核电发展的经验及对我国的启示：高度重视核电安全、制定科学合理的发展战略及加强核电技术标准化建设。     

Emergence of entrepreneurs following exogenous technological change

This paper explains how, after an exogenous technological change occurs, entrepreneurs displace incumbents who were ex ante capable of exploiting any innovations that resulted from the change. The model initially considers classical economic assumptions in the context of process innovations, and then its robustness to uncertainty, bounded rationality, firm asymmetry, and product innovations are discussed. The model is preliminarily tested against industry trends, using both results from an analysis of the information technology sector and from the literature. The paper does not suffer from the inconsistency of explaining how capable incumbents are displaced by resorting to characterizations of incumbents as incapable due to some inefficiency; the paper models incumbents as efficient yet rationally choosing, in some instances, to be displaced. Copyright © 1999 John Wiley & Sons, Ltd.     

柞木林不同层次光合、呼吸日变化规律研究

对柞本林同偿同层次叶片净光合强度和呼吸强度日变化的定位观测表明,林下幼树净光合强度日变化为单峰曲线,林冠中部和下部为双峰曲线,林冠表面为多峰曲线,各层次光合强度差异显著;呼吸强度各层次无显著差别。     

近50年湖南省耕地数量动态变化研究

湖南省是全国的农业大省之一,在全国农业发展格局中具有举足轻重的地位,其耕地数量的变化直接影响到全省乃至全国的粮食安全态势。文章利用1949-1999年的统计和普查数据,分析了湖南省近50年来耕地数量动态变化及地域差异,并进一步探讨了影响耕地动态变化的驱动因子。结果表明：50年来,湖南省耕地总体呈逐年下降态势,且区域变化差异明显;其中经济发展、社会系统和科技进步构成了耕地数量变化的主要驱动因子。     

近50年来我国区域经济空间极化的变化趋势研究

首先利用新近发展的ER、TW指数,以人均实际国内生产总值为指标,从经济总量上,详细考察了1952-2000年我国省市区经济空间极化变化趋势;其次利用广义熵的可分解特性,进一步探讨了1952-2000年我国区域经济不均衡在沿海-内陆、南方-北方区、高城镇化-低城镇化地区等具体空间方向上的极化及其变化趋势。     

建筑用相变蓄能材料研究现状与发展趋势

利用相变材料对清洁能源进行储存和使用已成为建筑节能设计的重要措施之一。对建筑用相变材料的研究和应用现状进行了总结概况,介绍了对建筑用相变材料的要求、常见种类、封装方法和选用原则,总结了相变材料与传统建筑材料复合、与建筑设施相结合两种主要应用形式,并通过案例阐述了已有的典型应用方法,讨论了相变材料在建筑中的应用面临的挑战和应用前景。为相变材料在建筑中的应用和研究提供参考。     

Employee involvement climate,task and citizenship performance,and instability as a moderator

This study explored the group-level effects of a climate of employee involvement. Using the immediate manager as the referent, we examined data from 153 workgroups to establish a positive relationship between climate for employee involvement and performance. Through multilevel analysis, we provide results supporting that a climate for employee involvement positively relates to group citizenship behaviors and group task performance, respectively. Furthermore, moderation analyses confirmed the deleterious effects of member turnover on the positive relationship between a climate of employee involvement and performance. Taken together, these results support the concurrent work exploring transactive memory and mental models in groups to further explicate the interactive effects of group-level perceptions and stability on performance.     

Climate risk management strategies and food security: Evidence from Cambodian rice farmers

This study investigates the adoption of three climate-resilient strategies (3CRS), drought/flood-resistant rice varieties, integrated pest management (IPM) practices, and weather advisory; the impact of 3CRS on food security, namely, productivity and profits of the Cambodian paddy farmers. Using endogenous switching regression (ESR) approach and household survey from Cambodian farmers, the study finds a low adoption rate (14%) of 3CRS. The low adoption of 3CRS means missing opportunities for rice farmers. Access to information through training and input suppliers is found to increase the adoption of 3CRS. The adoption of 3CRS increases rice yields and profits by 36% and 45%, respectively. Additionally, if nonadopters adopted 3CRS, rice yields and profits would increase by 55% and 52%, respectively. Findings suggest the development of institutional capacity, implementation, and dissemination of knowledge of climatic changes, and adaptation strategies to increase food security.