基于ISM的农产品价格波动的影响因素分析   总被引：1，自引：0，他引：1  

付莲莲  邓群钊  周利平等 《软科学》2014,(4):112-116

通过成分分解方法探讨21世纪以来国内农产品价格波动的趋势性、周期性和随机性并构建解释结构模型,分解出影响因素间的层次结构。结果表明:国内农产品价格总体呈上涨趋势,21世纪以来国内农产品价格波动经历了4个周期,呈现出从相对平稳到小幅度波动、最后到急剧波动的变化轨迹,价格波动的随机性也越来越强。农产品供求关系、货币供应量等是表层、趋势周期性因素;生物质能源等因素是中层、趋势性因素;自然灾害等因素是根源、随机因素。  相似文献   

区域文化是地方大学思想教育的宝贵特色介体     

尹玉英 《嘉应学院学报》2013,(1):87-90

在当前大学思想教育艰难和艰苦时期,区域文化传统和乡土优良美德,是地方大学思想教育的重要内容介体。以世界客都梅州的嘉应学院为例,客家千年优秀传统道德和中华优秀传统道德同根同源,客家美德继承、发扬、光大了中华优秀传统道德。客家民系聚居区的传统美德,是客都大学充分发掘和利用的宝贵资源。汲取客家优秀传统道德,以客家传统美德为生长点,整合并发扬光大,这是当前地方大学进行思想教育的独特内容。  相似文献   

个人风险倾向与创业决策关系研究:风险感知的中介作用     

马昆姝  覃蓉芳  胡培 《预测》2010,29(1):42-48

通过创业决策情景模拟,以问卷方式收集数据,基于风险行为影响因素模型,探讨了风险偏好作为前导变量、风险感知作为中介变量时,个人风险倾向与创业决策关系。研究结果表明：（1）风险偏好对风险倾向没有影响作用;（2）风险倾向正向影响创业决策;（3）创业风险感知负向影响创业决策;（4）创业风险感知部分中介了风险倾向对创业决策的作用。因此,谈论风险倾向无用还为时过早。  相似文献   

Reading habits of pre-service teachers / Trayectorias de lectura del profesorado en formación     

Felipe Munita 《Cultura y Educación》2013,25(3):448-475

Abstract

Recent studies on the reading habits of those studying to be teachers have questioned the reading identity of the people who are to become the future mediators of reading in school environments. Within this framework, the current research constitutes an exploratory hermeneutic interpretative study on the reading habits of pre-service teachers, in order to establish a reader profile for this population group, which is the focus of our study. The information is taken from students at Universidad Autónoma de Barcelona. It has been collected through sharing life experiences and has undergone a mixed content statistical analysis. The results reveal a standard profile defined by discontinuous reading habits, precarious intertexts and current practices mainly related to bestsellers.  相似文献   

自主性外语学习环境下的大学英语教师课堂中介作用调查研究     

高吉利 《安康学院学报》2013,(3):121-125

近年来,随着中介理论研究的不断发展,教师中介作用逐渐成为二语习得研究领域中的一大热点。本文在借鉴国外研究成果的基础上,提出了国内自主性外语学习环境下教师中介作用应涵盖的内容,并调查分析了国内6所高校159名大学英语教师和1856名大学生对教师中介作用的认识与看法以及教师在课堂教学中实施中介作用的情况。结果表明:(1)国内大学英语教师的中介意识总体较强,但实施中介作用的频度不高、程度不够;(2)教师的中介行为与学生的期望之间存在一定的差异。  相似文献   

Hand–arm strength and endurance as predictors of climbing performance     

《European Journal of Sport Science》2013,13(1):16-25

Abstract

The aims of this study were to examine training characteristics, body composition, muscular strength, and endurance in sport climbers, and to demonstrate the relationship among these components by means of structural equation modelling. Altogether, 205 sport climbers (136 males, 69 females), with a performance RP (red point) of grade 4 to 11 on the Union Internationale des Association d'Alpinisme (UIAA) scale, took part in the study. The proposed structural model, with latent variable hand–arm strength and endurance (developed from reference values for simple tests), indicated by three manifest variables (grip strength, bent-arm hang, and finger hang) and three exogenous variables (body fat, volume of climbing, and climbing experience), explained 97% of the variance in climbing performance. The relationship between body fat and climbing experience/volume with climbing performance was not direct, but was better explained using the mediator hand–arm strength and endurance. We conclude that these simple tests, together with percent body fat, volume of climbing, and climbing experience, can satisfactorily predict climbing performance.  相似文献   

Small fish,big pond: The role of health-related fitness and perceived athletic competence in mediating the physical activity-motor competence relationship during the transition from primary to secondary school     

Ú. Britton  S. Belton  J. Issartel 《Journal of sports sciences》2013,31(22):2538-2548

ABSTRACT

This study investigates the role of Perceived Athletic Competence (PAC) and Health-Related Fitness (HRF) in mediating the reciprocal relationship between Motor Competence (MC) and Physical Activity (PA) during the transition from primary to secondary school. MC, PA, PAC and HRF were measured in 224 participants (baseline age 12.26 ± .037 years; 51% female) in final year of primary school and one year later in first year of secondary school. Path analysis in AMOS 23 was used to test the mediating influence of PAC and HRF on the MC-PA relationship. Fit indices showed that, in both directions, HRF and PAC mediated the relationship between MC and PA (PA predicting MC; χ2 = 3.91, p = .272, CFI = .99, RMSEA = .04. MC predicting PA: χ2 = 6.46, p = .167, CFI = .99, RMSEA = .04). Pathways were stronger through HRF than through PAC, indicating that HRF is the more substantial mediator of the MC-PA relationship during the school transition. Pathways were stronger in the direction of PA predicting MC than in the reverse direction. Interventions seeking to influence PA and MC across the school transition should focus on HRF as it is a primary mediator of the MC-PA relationship.  相似文献   

灯盏花素神经保护作用及其机制研究进展     

颜娟  郑茂东 《河北北方学院学报(医学版)》2014,(3):31-38

灯盏花素是中药灯盏细辛主要的有效单体之一,属于黄酮类活性成分.研究表明,灯盏花素在脑损伤中具有很好的神经保护作用,其机制可能包括：改善能量代谢,清除自由基,抑制细胞内Ca2＋超载、兴奋性氨基酸毒性、炎症反应,调节脑内血管活性物质的产生,抑制神经元凋亡等.灯盏花素具有良好的临床应用前景,该文对灯盏花素近年来神经保护作用研究进展作一综述.  相似文献   

员工心理资本与对组织承诺传导机制的实证研究     

孔芳  赵西萍 《软科学》2011,25(8):96-99,114

运用中介作用模型检验了心理授权作为核心构念在心理资本和组织承诺关系间起到完全中介的作用;而心理授权的4个维度(意义、自主性、能力和影响力)分别在心理资本和组织承诺的关系间起到部分中介的作用,从而揭示了心理资本对组织承诺的影响机理,同时也说明心理授权作为整体构念超过了单一维度的影响和作用。  相似文献   

我国青年科技人才科学精神与创新行为关系研究   总被引：1，自引：0，他引：1  

张相林 《中国软科学》2011,(9)

在国内首次对青年创新人才的科学精神进行了界定和研究,特别是用实证研究的方法,对我国青年科技人才科学精神现状进行了调查和分析.研究发现:科学精神在创新任务设计、创新投入、创新环境、创新组织气氛等外部影响因素和创新行为之间起中介作用,是制约青年科技人才创新行为的重要因素.增加创新投入和改善创新环境有助于改善青年科技人才的创新行为,但不是关键的因素.该研究结论对于青年科技人才开发与管理以及创新型国家建设有启示意义.  相似文献