具有高投标成本的多属性逆向拍卖博弈模型

越来越多像GE这样的大型企业在利用多属性逆向拍卖选择新的供应商采购产品时,通常会设定较高的固定投标成本。针对此情况,建立了三阶段的非合作博弈模型,并利用求解子博弈纳什均衡策略的方法,推导出了供应商的最优投标价格。并得到以下两个主要结论:一是供应商的最优投标策略是按照生产产品真实的质量和交货期进行投标,且投标价格为最优投标价格;二是采购商的最优策略是选择投标价格最高的供应商作为拍卖获胜者,这一违反直觉的结论。这是合理的,因为投标价格最高的供应商也是类型最优的供应商,也即投标质量和投标交货期组合最优的供应商。最后,利用数值实验验证了模型的有效性,并显示出设定相对较高的固定投标成本对采购商来说是有利的。     

Positive Changes in Perceptions and Selections of Healthful Foods by College Students After a Short-Term Point-of-Selection Intervention at a Dining Hall

Abstract

Objective: Determine the effects of a short-term, multi-faceted, point-of-selection intervention on college students’ perceptions and selection of 10 targeted healthful foods in a university dining hall and changes in their self-reported overall eating behaviors. Participants: 104 college students, (age 18–23) completed pre-I and post-I surveys. Methods: Pre-survey collected at dining hall in April 2007, followed by 3-week intervention then post-survey collected via email. Healthy choice indicators, large signs, table tents, flyers and colorful photographs with “benefit-based messages” promoted targeted foods. Response rate to both surveys was 38%. Results: Significantly more participants reported that healthful choices were clearly identified in the dining hall after the intervention. Over 20% of participants reported becoming more aware of healthful food choices in the dining hall after the intervention. Significant increases in self-reported intake were reported for cottage cheese and low-fat salad dressing, with a trend toward increased consumption of fresh fruit. Seven of the 14 assessed eating behaviors had significant changes in the desired direction. Increased awareness of healthful foods was the top reason for self-reported changes in overall eating behaviors. Conclusion: Short-term, multi-faceted, point-of-selection marketing of healthful foods in university dining halls may be beneficial for improving college students’ perceptions and selections of targeted healthful foods in the dining hall and may improve overall eating behaviors of college students.     

高校研究生学风建设刍议

学风建设是研究生教育的重要组成部分,直接决定了研究生的培养质量.当前我国高校研究生学风建设中普遍存在学生学习主动性差、学习动机功利化、诚信意识淡薄;科研团队管理水平参差不齐;教育管理体制机制不完善等问题.应加强学习与行为塑造,形成严格自律的学习风气;加强科研团队建设与管理,形成严谨求实的治学风气;加强校园文化建设,完善制度保障体系,营造积极进取的学术风气.     

细论《文心雕龙·风骨》篇

刘勰在《文心雕龙·风骨》篇中以三个部分展开对“风骨”的论述：第一,“风骨”概念的提出;第二：气、采与风骨三者的关系;第三：风骨与新巧的讨论。以上述的三个层次来阐释文本,《风骨》篇的整体面貌得以还原,风骨,气,采,新奇等概念也在对文本的分析中得到解释。     

Increasing Child Serving Professionals’ Awareness and Understanding of the Commercial Sexual Exploitation of Children

ABSTRACT

Child serving professionals need increased understanding of the identification and therapeutic needs of child victims of commercial sexual exploitation. This study evaluated the effectiveness of a training program aimed to increase awareness of commercial sexual exploitation of children (CSEC) among professionals likely to encounter victims in their work. Professionals’ (N = 227) knowledge level was examined prior to the training, immediately thereafter, and in a 6–12 month follow-up. Despite professional position or years of experience, participants had similar levels of CSEC knowledge before the training and all showed a significant improvement in their knowledge after the training. However, follow-up testing on a smaller subsample demonstrated that knowledge gains were not maintained. The analysis of the participants’ responses to how their behavior would change subsequent to the training revealed important themes including: (1) greater ability to identify/assess or recognize CSEC victims, (2) greater understanding and knowledge of CSEC, (3) increased ability to communicate, interact, and engage with CSEC victims, and (4) heightened desire to educate others and raise awareness about CSEC. Results also indicated that participants were very satisfied with the training and found it highly relevant to their work.     

当代大学生就业取向及心理影响因素刍议

通过对当代大学生就业总体状况的分析,认为影响大学生就业取向的因素有就业类型、未来规划、就业地区和就业薪资,阐述了影响就业心理的主观因素与客观因素。最后,针对大学生就业取向及影响因素展开讨论和建议,认为当代大学生只有树立正确择业价值观,发挥自主创新精神才能更好的面临就业压力,而且学校、政府和社会的支持是确保大学生顺利就业的稳定保障。     

SYMBOLIC REALITY BITES: WOMEN AND RACIAL/ETHNIC MINORITIES IN MODERN FILM

Criticisms of mass media productions often include a discussion of how women and minorities are systematically excluded and/or relegated to minor roles, or roles that match traditional stereotypes. These types of portrayals are important factors in the social construction of reality among the general public, and therefore may perpetuate racism and sexism on a larger scale. Using a content analysis of fifty popular films in 1996 the present study explores the demographic composition of the leading actresses and actors. The goal is to gauge the strength of female and minority presence and to provide an assessment of character representations through an analysis of labor force participation, sex-roles of occupation, prestige of occupation, and gender. Findings indicate that although both women and minorities have made some advancement in their film portrayals, compared to earlier studies, they still are under-represented in leading roles in Hollywood, and their portrayals are often consistent with traditional stereotypes.     

Planning for Aging in Place: Incorporating the Voice of Elders to Promote Quality of Life

Abstract

Aging in place offers emotional and physical benefits; however, challenges associated with advanced age may make aging in place difficult. As communities across the country prepare for forecasted increases in the proportion of older residents, it is important to understand barriers that may prevent aging in place. Perceived barriers voiced by residents of a suburban county who completed an Aging in Place Needs Assessment Survey were categorized into four themes: need to downsize/home modification; need for assistance; family desire to reciprocate care; and isolation. A fifth group with no intent to relocate, but with concerns about having to, was also identified. Included among this group were persons with mental health or developmental disorders, such as anxiety and autism spectrum disorder. Results were examined through a person-centered lens to illustrate that aging in place may be the desired option even among residents who indicate that it is not. It is important that aging-in-place initiatives preserve identity by fostering a sense of autonomy, control, and well-being in older residents.     

《关于在外层空间使用核动力源的原则》之再思考

《关于在外层空间使用核动力源的原则》被通过已经20年,尽管该原则仅属于联合国决议的范畴,其法律上的约束力不及国际公约,但由于该原则所涉及的内容不仅关乎一般意义上的核安全应用,更关系到整个外层空间探索与开发的有序和健康,随着空间事业的发展,其地位和作用愈发重要,尤其是随着国际社会有关核安全机制的建设日益深入,作为该领域一个基础性规范文件的重要性不言而喻,在20年沉淀和经验的基础上重新审视该原则的背景、文本内容,并在此基础上,对其可能的发展趋势做出有效的分析和认定,无论在理论上还是在实践中都富有重要的意义和价值。同时,可以为中国未来空间核利用以及核安全机制的建立,提供理论上的铺垫与准备。     

Thoughts on Innovation in Mainstream Ideology Research

主流意识形态与中国哲学社会科学创新体系具有紧密的联系, 创新主流意识形态 研究方式, 既是当代中国一个重要的理论与现实命题, 亦是中国哲学社会科学创新体 系的前提。创新中国主流意识形态研究方式, 有三个重要的维度: 一是从文明格局的 高度创新主流意识形态研究方式, 把握主流意识形态的历史连续性与文化特性, 反对 历史虚无主义和历史复古主义; 二是以包容并蓄的方式拓展、丰富主流意识形态研究 的视角与内容, 在研究创新中优化主导地位, 克服居高临下的意识形态傲慢和无力失 语的意识形态虚弱症状; 三是秉承开放学习的心态对国外主流意识形态进行比较研 究, 在借鉴交流中维护我国的主流意识形态安全, 克服封闭自语和盲目崇外的意识形 态研究套路, 创造无愧于时代的意识形态新文化。

关键词: 主流意识形态 哲学社会科学创新 意识形态安全

Mainstream ideology is closely related with the innovation system of Chinese philosophy and social sciences. Innovation in mainstream ideology research is of theoretical and practical significance to contemporary China, and constitutes a precondition for the establishment of an innovation system of Chinese philosophy and social sciences. Innovation in mainstream ideology research involves three important aspects. First, we should innovate mainstream ideology research in terms of the pattern of civilizations, that is, to grasp the historical continuity and cultural identity of mainstream ideology and oppose historical nihilism and revivalism. Second, we should adopt an inclusive approach to mainstream ideology research to bring in different perspectives and enrich the content of research, and to optimize its guiding role and overcome both ideological arrogance and ideological aphasia. And third, we must be open-minded in carrying out a comparative analysis of mainstream ideologies of other countries. In exchanges with and learning from other countries, we should protect the safety of mainstream Chinese ideology and avoid both self-contained isolationism and a blind worship of foreign things. In this way, we can develop a new ideological culture that is worthy of our times.