Adolescents’ Socio‐Motivational Relationships With Teachers,Amygdala Response to Teacher's Negative Facial Expressions,and Test Anxiety

The amygdala is essential for processing emotions, including the processing of aversive faces. The aim of this multimethodological study was to relate the amygdala reactivity of students (N = 88) toward teachers’ fearful and angry faces, to students’ relationship with their teachers. Furthermore, students’ neural responses during the perception of teachers’ faces were tested as predictors of test anxiety (controlling for neuroticism as a potential trait anxiety effect). Multiple regression analysis revealed that students reporting high‐quality teacher–student relationships showed stronger amygdala activity toward fearful faces, which was related to worry. Furthermore, students with high levels of neuroticism tended to perceive their teachers as motivators and showed higher amygdala activity toward angry faces, which was related to the measures of emotionality.     

Using Work Values to Predict Post‐Retirement Work Intentions

Work values might be proximal predictors of individuals' late‐career intentions because they serve as guiding principles for the selection, evaluation, and justification of vocational behavior. The purpose of this study was to examine the relationship between work values and post‐retirement work intentions. The authors investigated individual work values within the structure of 4 higher order values elaborated on by Schwartz et al. ( 2012 ). Relationships between work values and 4 types of post‐retirement work intentions were examined. Data from 1,071 employees of a German logistics company were used to test the hypotheses. The results of a structural equation model indicated that work values were differentially related to the 4 types of post‐retirement work intentions. The identified work value–work type combinations add to the literature on post‐retirement work. Practice implications for promoting positive individual and organizational outcomes are drawn from the results.     

Off‐Time Pubertal Timing Predicts Physiological Reactivity to Postpuberty Interpersonal Stress

We investigated associations between retrospectively assessed timing of pubertal development, interpersonal interactions, and hypothalamic–pituitary–adrenal axis reactivity to an interpersonal stress task in 110 young adult women. Participants provided salivary cortisol samples at points prior and subsequent to a video‐taped conflict discussion with their romantic partner. Participants also provided subjective global ratings of their discussion on dimensions of conflict and support. For earlier developing girls, higher levels of interpersonal conflict were associated with greater physiological stress in anticipation of the discussion task and less physiological recovery following the discussion. In contrast, for later developing girls, low levels of conflict were associated with greater anticipatory stress and less physiological recovery. These findings have implications for understanding the influence of off‐time pubertal development on the lifetime development of young women.     

组合预测在油气操作成本预测中的应用

油气操作成本在油气生产中占有较大比重，其高低直接影响油气田开发的经济效益。准确地预测油气单位操作成本，可以在生产中采取有效的控制手段，降低成本，提高企业效益。将组合预测法应用于油气操作成本的预测，利用非线性回归模型和灰色模型加权组合建立组合预测模型，并通过平均绝对误差、平均绝对百分比误差、均方误差和均方百分比误差等指标比较，证明组合模型比单一模型的预测效果更好，能提高油气操作成本预测的精度。     

Testing the Granger Noncausality Hypothesis in Stationary Nonlinear Models of Unknown Functional Form

In this article, we propose a general method for testing the Granger noncausality hypothesis in stationary nonlinear models of unknown functional form. These tests are based on a Taylor expansion of the nonlinear model around a given point in the sample space. We study the performance of our tests by a Monte Carlo experiment and compare these to the most widely used linear test. Our tests appear to be well-sized and have reasonably good power properties.     

中日音乐文化交流的历史渊源

本文追溯了中日音乐文化交流的历史渊源,认为两国历史上音乐文化的交流是相互的,友好的,促进了两国音乐文化的发展。     

一种混合建模方法及其在ETF期权定价中的应用

科学合理的交易型开放式指数基金（ETF）期权定价有利于充分发挥其风险对冲功能,也是一个需要准确掌握市场规律并兼顾经济学意义的复杂建模过程。本文提出了一种新的混合建模方法,将嵌套长短时记忆神经网络模型（NLSTM）与Heston模型结合,实现ETF期权定价偏差的动态修正,并基于华夏上证50ETF、嘉实沪深300ETF和华泰柏瑞沪深300ETF的高频期权数据,实验验证了所提方法的有效性。研究结果表明,不同类型ETF期权价格的波动特征差异显著,无论是基于BS定价模型还是Heston定价模型都难以准确刻画ETF期权价格的复杂变化规律。通过将NLSTM神经网络模型与Heston模型结合,能够有效地捕捉不同类型ETF期权的动态变化规律,从而提升ETF期权定价的准确性。     

国际工程承包商生态位测度与分析——基于ENR国际承包商250/225强的实证研究

从企业生态位理论的视角,提出国际工程承包企业生态位宽度及生态位重叠度等表征指标及相应的测度方法,分析国际工程承包企业国际市场资源的多样化及利用程度、目标市场的相似度和竞争程度。根据ENR发布的全球250/225强国际承包商历年业务统计数据,针对13个主要国家的国际承包商进行国际市场生态位测度,定量分析不同国家国际承包企业在复杂国际市场环境中的生态位状况;并进行中国国际承包商与美国国际承包商的对比分析。研究发现:欧美承包商比亚洲承包商具有更高的生态位宽度,生态位宽度高的国别承包商之间存在较高的生态位重叠度;美、德、韩、日、英、意、澳等国承包商是中国承包商的主要竞争者,中国承包商正处于快速发展阶段,需不断提高自身综合能力,进一步拓展国际市场空间。     

非使役化中英语动词的语义选择研究

非使役化中,从使役动词到作格动词的转换,原生及物动词同时受到三种语义选择限制:其一,动词包含"使役义([+cause])"特征;其二,动词是动态动词,表示状态变化;其三,动词的外因可以通过句法(为降级题元,充当介词的补语)或语用(为暗指题元)手段判别.