规则认同、个体学习与转型期社区共享资源合作治理     

夏茂森  方鸣  江玲玲 《安徽师范大学学报(人文社会科学版)》2019,47(4):141-149

本文尝试将规则认同偏好、个体信念学习调整纳入多人自愿合作的分析框架,并构建了基于转型期社区共享资源合作治理的博弈理论模型,考察规则认同偏好异质性、个体学习在社区共享资源合作治理中的作用机理,并进行了相应的仿真模拟分析。研究表明,规则认同偏好的异质性影响个体的策略选择调整,进而影响社区共享资源的合作治理,尤其是当政府在部分或完全退出社区共享资源治理情况下,对避免或弥补转型期社区共享资源“治理真空”具有重要的影响作用。此外,自发治理的规则认同程度与合作治理的形成概率成正比,且规则偏好在一定程度上可以缓解共享资源合作治理的成本问题。但随着治理成本的不断上升,规则认同与合作治理两者之间的条件比率呈递减趋势。  相似文献   

Evaluating the appropriateness of electronic information resources for learning     

Dinara Saparova  Nathanial S. Nolan 《Journal of the Medical Library Association》2016,104(1):24-32

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Comparison of three web-scale discovery services for health sciences research     

Rosie Hanneke  Kelly K. O'Brien 《Journal of the Medical Library Association》2016,104(2):109-117

Objective

The purpose of this study was to investigate the relative effectiveness of three web-scale discovery (WSD) tools in answering health sciences search queries.

Methods

Simple keyword searches, based on topics from six health sciences disciplines, were run at multiple real-world implementations of EBSCO Discovery Service (EDS), Ex Libris''s Primo, and ProQuest''s Summon. Each WSD tool was evaluated in its ability to retrieve relevant results and in its coverage of MEDLINE content.

Results

All WSD tools returned between 50%–60% relevant results. Primo returned a higher number of duplicate results than the other 2 WSD products. Summon results were more relevant when search terms were automatically mapped to controlled vocabulary. EDS indexed the largest number of MEDLINE citations, followed closely by Summon. Additionally, keyword searches in all 3 WSD tools retrieved relevant material that was not found with precision (Medical Subject Headings) searches in MEDLINE.

Conclusions

None of the 3 WSD products studied was overwhelmingly more effective in returning relevant results. While difficult to place the figure of 50%–60% relevance in context, it implies a strong likelihood that the average user would be able to find satisfactory sources on the first page of search results using a rudimentary keyword search. The discovery of additional relevant material beyond that retrieved from MEDLINE indicates WSD tools'' value as a supplement to traditional resources for health sciences researchers.  相似文献   

基于CRM的企业间的客户竞争研究   总被引：1，自引：0，他引：1  

路晓伟  蒋馥 《预测》2004,23(3):27-30

传统客户竞争模型存在不足,不能用于客户关系管理CRM下的客户竞争。为从理论上深入研究CRM下的客户竞争,建立了CRM下的企业间客户竞争的理论模型。在这个模型中,首次包含了CRM中客户对不同企业品牌的偏好因素、客户关系周期长度和产品定价模式对客户竞争的影响。通过对竞争模型的分析,得到了CRM下竞争企业的定价下限、发生转移的客户的偏好特征模式和企业的市场份额函数等客户竞争结果。  相似文献   

大学图书馆本科生流通服务工作重构依据及其实证研究     

潘颖  刘利  杨贺晴 《图书馆理论与实践》2020,(2):19-25,55

为了明晰纸本图书的存在价值,为图书馆流通服务的转型提供参考,本文选取某高校2011级4个学院本科毕业生为研究样本,将借阅数据与成绩数据相关联,从借阅册数、文献类别、借阅时间、利用周期4个维度对本科生纸本图书借阅与课程成绩的相关性和贡献度进行实证分析。研究表明,纸本资源对于学生学习的作用并未下降,应明确面向本科生的图书馆纸本资源流通服务方向,有效整合馆员、资源、空间等要素,以重构流通服务模式及流程。  相似文献   

论大学生体育消费与体育品牌偏好     

田建春  杨江 《南昌教育学院学报》2011,(12):184-186

高校市场已经成为当下体育运动品牌争夺的主战场。高校大学生不仅在现实中有着巨大的体育消费需求,同时也是各企业争夺潜在消费者的关键。通过阅读文献资料,采用问卷调查和访谈的方法,对大学生体育消费现状和品牌偏好情况进行了解和分析,用调研结果来验证理论,并对促进大学生体育消费和体育品牌在大学生市场的推广提出建议。  相似文献   

Adverse experiences in early childhood and their longitudinal impact on later behavioral problems of children living in poverty     

《Child abuse & neglect》2019

BackgroundAdverse childhood experiences (ACEs) are an identified risk factor for the social and emotional development of children. What is less known is the long-term effects of ACEs when poverty and ACEs coincide.ObjectiveUsing longitudinal cohort-panel data, we examined whether exposure to ACEs by the age of three among poor children would longitudinally result in behavioral problems at ages three, five, nine, and 15, after controlling for mothers’ socioeconomic status and their children’s characteristics.Participants and settingWe used a subsample of 2750 children and their parents living in urban poverty from the Fragile Families and Child Wellbeing study.MethodsLogistic regression modeling was used to obtain adjusted odds ratios of ACE categories predicting behavioral problems after accounting for family socioeconomic position.ResultsOur findings indicate that experiencing ACEs in early childhood was significantly associated with later behavioral outcomes from childhood to adolescence. Exposure to multiple ACEs before the age of three was significantly associated with the top-risk behavior group at age five; the odd ratios were 2.0 (CI = 1.3–3.1) and 2.9 (CI = 1.8–4.6) for two ACEs and three or more ACEs, respectively. At both ages nine and 15, children experiencing two or more ACEs had 1.9 to 3.2 times higher odds to demonstrate more the top 10th percentile of behavioral problems. Among covariates, mothers’ race and education, and children’s gender and temperament were identified as significant factors to determine behavior problems.ConclusionsThe findings support policies and programs for families with children who have experienced economic disadvantages and early childhood adversity.  相似文献   

A mediational model linking perceptions of security,alexithymia and behavior problems of sexually abused children     

《Child abuse & neglect》2019

BackgroundPerceptions of security toward parents are related with internalized and externalized problems among victims of child sexual abuse (CSA). Alexithymia, which is difficulty in identifying and expressing feelings, is associated with the quality of parent-child relationships (Oskis et al., 2013) and behavior problems in children (Di Trani et al., 2013).ObjectiveThe current study tested the mediational role of alexithymia in the relationship between perceptions of security toward parents and behavior problems among CSA victims.Participants and methodUsing a short-term multi-informant prospective design, 263 victims of CSA aged 6–12 years completed the Kerns Security Scale (Kerns, Klepac, & Cole, 1996), which evaluates perceived attachment security to mothers and fathers. Parents completed the Child Behavior Checklist (Achenbach & Rescorla, 2001) at Time 1 to provide baseline scores of behavior problems and again four months later. At Time 2, parents also assessed the children’s alexithymia using the Children’s Alexithymia Measure (Way et al., 2010).ResultsPerceptions of security were both associated with alexithymia, as well as with internalizing and externalizing problems (p < .05). A mediational model showed that perception of security toward fathers outweighed the mother-child relationship in predicting children’s alexithymia. Path analysis revealed that the father-child relationship predicted decreased behavioral problems at Time 2 through a lower level of alexithymia. The model explained 46.9% of internalizing problems and 56.1% of externalizing problems (p < .05).ConclusionsThe findings support the relevance of alexithymia as an intervention target for CSA victims and underscore the importance of the father-child relationship.  相似文献   

黑龙江省大学生运动员学习心理疲劳状况调查     

刘正国  郭霞 《哈尔滨体育学院学报》2010,28(3)

为了探讨大学生运动员学习心理疲劳状况,本研究选取黑龙江省大学生运动员343人进行了学习心理疲劳的调查。结果表明,随着年级的增长,学习心理疲劳加重,尤其是大四毕业生对学习的兴趣以及对个人成就的体验均呈下降趋势。  相似文献   

陕西秦岭旅游景区认知与选择偏好研究     

田祥利  宋保平  延军平 《资源科学》2010,32(5):873-879

在大尺度区域旅游规划兴起背景下，本研究以陕西省秦岭旅游发展专项规划为例，基于客源群体差异角度,运用认知度和偏好度等值线图对大区域旅游景区认知和选择偏好规律进行了探究，结果表明：①成熟型和稳定型旅游景区形成认高知度聚集区，成长型和开发型旅游景区形成低认知度分散区；②旅游景区选择偏好形成聚集区和辐射区,数量选择偏好存在差异，旅游景区空间显示偏好与交通通达性密切相关；③大区域旅游景区认知度和选择偏好度存在正相关关系，形成了以认知为基础的旅游景区偏好和出游倾向。  相似文献