一种优化标签的矩阵分解推荐算法

个性化推荐研究中,垃圾标签不仅会导致数据稀疏性问题,同时影响推荐的实时性和精确性。因此提出一种优化标签的矩阵分解推荐算法OTMFR,该算法分为两个阶段：首先优化标签,在建立三部网络图的基础上提出一种标签排序算法,利用互增强的关系得到关于标签流行度的排序,去除排序靠后的垃圾标签;然后在此基础上利用用户和资源对标签的偏好信息构建用户-资源偏好矩阵,并从矩阵分解的角度为用户产生推荐。在Delicious数据集上的实验结果表明,该算法在推荐精准度上有较为明显的效果。     

正确认识和处理基层维稳工作中的四个关系

企业是社会的细胞。维护企业稳定是刨建和谐社会的需要,也是企业党组织的重要任务。通过对基层情况的调查研究,提出做好基层维稳工作、建设和谐企业,必须正确认识和处理好新账与旧账、平时与临时、个人与集体、主动与被动的四个关系。     

承德地区某铁磷矿工艺矿物学研究

通过化学分析、光学显微镜、X射线衍射分析及矿物自动解离系统(MLA)等分析方法,对承德地区某铁磷矿的化学成分、矿物组成、结构构造、嵌布关系、矿物粒度组成及矿物解离分析、有益元素赋存状态等方面进行了系统的工艺矿物学研究。矿石中有用元素主要为磷、铁、钛,其中磷主要赋存在磷灰石中,较易解离和回收;铁主要赋存在钒钛磁铁矿中,大部分易于解离和回收,小部分较难回收;钛主要赋存在钛铁矿中,以单颗粒或集合体形式分布的易于解离和回收,而以片晶形式分布在磁铁矿中的则难以解离将进入铁精矿。     

关于高校师德建设的思考

高校师德建设是高校思想政治工作的关键环节.在师德建设过程中要注意处理好最低底线与最终目标、权利与义务、内部自律与外部强制的辩证关系.另外,要抓住领导干部的师德建设这个枢纽,建立健全科学的评价体系,建立师德培训的长效机制,抓好典型示范工作.     

Architecture of Disbelief: Is Architectural Speciation a Good Thing?

Can visionary architects have their cake and eat it, luxuriating in pecuniary success while also continuing to assert their avant-gardism? Neil Spiller attended a conference in Cornell that brought the role of the architectural visionary under the spotlight and gave him much food for thought. Copyright © 2009 John Wiley & Sons, Ltd.     

考虑相变塑性影响的渗碳淬火齿轮的残余应力

分析了渗碳淬火齿轮残余应力的形成,建立了一种含相变塑性的热弹性本构关系.利用有限元方法对一个渗碳淬火齿轮的残余应力进行了计算.并与实验结果进行了比较,讨论了引入相变塑性的效果.     

Antipathetic relationships in child and adolescent development: A meta-analytic review and recommendations for an emerging area of study.

Antipathetic relationships, or relationships based on mutual dislike, have received less attention than other aspects of children’s peer relations. The present meta-analytic review summarizes the existing literature (26 studies consisting of over 23,000 children and adolescents) to illuminate the prevalence of antipathetic relationships and their associations with maladjustment. Results indicate that 35% of children have an antipathetic relationship and that antipathetic relationships are associated with externalizing and internalizing problems, low academic achievement, low prosocial behavior, victimization and rejection by peers, and lower positive peer regard (e.g., social preference) and friendships. Gender differences in antipathetic relationships are trivial, and antipathetic relationships are equally often same and mixed gender. Collectively, the findings indicate the importance of studying antipathetic relationships, and several directions for future research are described. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Instruction, teacher–student relations, and math achievement trajectories in elementary school.

Children enter elementary school with widely different skill levels in core subjects. Whether because of differences in aptitude or in preparedness, these initial skill differences often translate into systematic disparities in achievement over time. How can teachers reduce these disparities? Three possibilities are to offer basic skills training, to expose students to higher order instruction, or to provide socioemotional support. Repeated measures analyses of longitudinal data from the Eunice Kennedy Shriver National Institute of Child Health and Human Development Study of Early Child Care and Youth Development revealed that children with low, average, or high math skills prior to elementary school followed different but parallel trajectories of math achievement up through fifth grade. When enrolled in classes with inference-based instruction, however, the initially least skilled children narrowed the achievement gap as long as they did not have conflictual relations with their teachers. They did not make this kind of progress if they were in classes focused exclusively on basic skills instruction or if they were in inference-focused classes but had conflictual relations with teachers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Attributions of intentions and fairness judgments regarding interracial peer encounters.

To investigate how adolescents interpret ambiguous actions in hypothetical interracial peer encounters, we conducted a study in which 8th- and 11th-grade students (N = 837) evaluated 4 interracial peer encounters in which the intentions of the protagonist were ambiguous. The sample was evenly divided by gender and included both African American and European American adolescents. European American students, male adolescents, and 8th graders were more likely to attribute negative intentions to the protagonist in interracial exchanges than were African American students, female adolescents, and 11th graders. Although all participants viewed peer and teacher accusations of wrongdoing in ambiguous situations as unfair, ethnic minority students as well as female adolescents rated accusations of wrongdoing as more unfair than did ethnic majority or male adolescents. Eleventh graders were more likely to view accusations of wrongdoing for protagonists with a prior history of transgression as fair than were 8th graders. The findings are discussed in light of efforts to reduce prejudice and to facilitate positive intergroup peer interactions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The face of aging: Sensitivity to facial feature relations changes with age.

Fundamental to face processing is the ability to encode information about the spatial relations among facial features (configural information). Using a bizarreness rating paradigm, we found older adults differed from young adults in rating configurally distorted faces (eyes, mouth inverted) as less bizarre across all tested orientations (0° to 180°), and were more vulnerable to orientation effects when faces were rotated beyond 90°. No age-related differences in perception of either unaltered faces or featurally distorted faces (eyes whitened, teeth blackened) occurred. These findings identify changes in sensitivity to configural information as an important factor in age-related differences in face perception. (PsycINFO Database Record (c) 2010 APA, all rights reserved)