京津冀生态环境建设：现状、问题与应对

以一座钢管混凝土连续梁拱组合单线铁路桥为工程背景,采用先整体后局部的两步分析法,首先利用Midas/Civil软件建立全桥有限元模型,计算拱肋安装及后续施工阶段结构的受力状态,得到局部模型的力边界条件;然后利用ANSYS软件建立拱脚结点局部有限元模型,分析施工期间拱脚结点的局部应力分布规律和应力集中程度;最后将拱脚结点应力计算值与实测值进行比较。结果表明,拱肋与梁体间传力顺畅,拱脚混凝土基本处于受压状态;拱脚内侧与箱梁顶板交界处应力集中现象较明显;拱脚上部拱肋周围、拱脚前脚趾处及两拱脚之间箱梁顶板的局部区域出现较大的拉应力,建议在同类桥梁的设计中加强这些部位的构造措施和配筋。拱脚结点应力计算值与实测值比较接近,说明用实体有限元模型计算的局部应力是可靠的,可用于设计验算。     

The Association Between Gay Men's Stereotypic Beliefs About Drag Queens and Their Endorsement of Hypermasculinity

To date, few researchers have investigated gay men's stereotypic beliefs about drag queens and the association between these beliefs and individual difference variables such as hypermasculinity. To address this omission, 118 men self-identifying as non-heterosexual completed an online survey consisting of an adjective checklist about drag queens and a psychometrically sound indicant of hypermasculinity. As predicted, participants who were more likely to endorse hypermasculine belief statements tended to perceive negatively valenced attributes as more characteristic of drag queens. Possible explanations for this relationship, limitations associated with the current study, and directions for future research are delineated.     

Sociopolitical control among parents of school-age children in a post-socialist city

This study explored sociopolitical control among parents of school-age children in a suburban municipality of a large post-socialist city. The participants completed a questionnaire that asked them about their sense of sociopolitical control in terms of leadership competence and policy control, as well as about other aspects of their lives, including mental health. The findings show that the participants have a greater sense of sociopolitical control in terms of leadership competence than in terms of policy control. Moreover, the findings show that voting in the last presidential election and degree of depression influenced negatively the sense of leadership competence among parti-cipants. Within the context of empowerment, the findings have implications for practice which focuses on consumer-based activities that allow citizens more leadership opportunities and control at the local level. Future research is needed that replicates this study, taking into account its limitations. In order for citizens in post-socialist countries to create civil societies at the same time that they implement market economies, they must be empowered. Some evidence suggests that several factors, including mental health problems, may influence the sense of empowerment among citizens in post-socialist coun-tries. Within the context of empowerment, this study examines sociopolitical control among citizens in a suburb of a large post-socialist city. The findings in the study have implications for social welfare practice in this city and for future research.     

Business drivers not sector membership determine the most effective production planning and control; a novel approach to a perennial problem

This paper outlines research aimed at developing novel planning and scheduling reference models for industrial sectors where the MRPII paradigm is not appropriate. It outlines the process mapping approach adopted, the data capture method developed for the case study companies, the use of ARIS (Scheer's) enterprise modelling tool, and the first stages in the production of sector reference models.     

Achievement in a Relational Context: Preferences and Influences in Female Adolescents

Friends' influence on achievement‐related choices in female adolescents was investigated using the Thematic Apperception Test (H. Murray, 1943), in the context of self‐in‐relation theory (J. V. Jordon, A. G. Kaplan, J. B. Miller, I. P. Stiver, & J. L. Surrey, 1991). Two hypotheses were tested: (1) Achievement‐related stimuli will elicit stories with more unfavorable and conflicted outcomes than will affiliation stimuli; (2) Thematic representation of achievement will be more homogeneous in more highly cohesive peer groups. A multivariate analysis of variance with repeated measures yielded significant results for Hypothesis 1. Thematic analysis of stories supported Hypothesis 2, showing peer group influence on achievement strivings in female adolescents.     

Brain Electrical Activity Associated With Cognitive Processing During a Looking Version of the A‐Not‐B Task

This work was designed to investigate individual differences in brain electrical activity during a looking version of the A‐not‐B task. It was proposed that this spatial task required the cognitive skills of working memory and inhibitory control, each associated with frontal lobe function. Electroencephalograms (EEGs) were recorded from 54 8‐month‐old infants during baseline and task. Only high performers on the looking task exhibited increases in 6‐ to 9‐Hz EEG power from baseline to task. These task‐related changes were evident at frontal and posterior scalp locations. High performers on the looking task exhibited lower EEG coherence values at right hemisphere frontal locations relative to the low performers. These lower coherence values were evident during baseline and task. All infants showed increased frontal‐parietal coherence during the spatial working memory task relative to baseline values. These data confirm previous cognitive neuroscience work associating frontal lobe function with cognitive performance levels during infancy.     

Career Techniques and Interventions: Themes From an International Conversation

The need for appropriate, timely, and increasingly comprehensive career development and education programs continues to escalate. It is interesting that despite the differences in cultures, religions, economies, political systems, and education structures, many countries face similar challenges when designing and implementing career development programs. Sharing and adapting career development interventions and techniques cross‐culturally appear to be viable strategies for implementing or enhancing programs, provided the concepts and materials are tailored to the countries' unique requirements.     

经济承压背景下中国能源经济预测与展望

2019年中央经济工作会议强调,中国正处在转变发展方式、优化经济结构、转换增长动力的攻关期,经济下行压力不断加大。以此为背景阐述能源经济发展现状,分析重点行业发展前景,通过不同情景下的预测分析,探讨经济承压背景下中国能源经济发展的路径与趋势。根据预测结果,经济承压对各行业的能源消费量存在普遍影响,尤其是煤炭、黑色金属冶炼和汽车行业的能源消费量在未来一段时间将呈下降趋势;在基准情形下,预计到2030年,中国GDP将达到171.97万亿元（2018年不变价水平）,能源消费总量约57.09亿吨标准煤,煤炭消费占比将不断下降,清洁能源占比预计达到41.7%。根据预测结果,有针对性地在能源消费结构、能源效率和能源合作方面提出政策建议。