旋转目标RCS的二维成像

应用标量克希霍夫积分定理分析了旋转目标RCS的二维成像问题,获得在双天线测量系统中成像剖面包含从雷达到目标的轴线和成像剖面垂直于收发天线的联线。收发天线的联线与成像剖面垂直时可得到目标RCS的二维成像;当收发天线联线与成像剖面平行时仅能得到目标RCS的一维成像。该结论为旋转目标RCS二维成像系统设计提供了理论基础。     

收入多元化对中国商业银行安全性的影响研究

中国商业银行追求收入多元化所引发的经营风险性问题已得到广泛重视。考虑银行规模与收入多元化对商业银行安全性的交叉影响问题,建立交叉影响实证模型,分析中国商业银行收入多元化进程中的银行规模、收入结构、资本充足性等因素对银行安全性的影响。发现银行规模对银行非利息业务开展中经营风险的抑制效用,中国大型商业银行应注重资产规模的稳定而非收入多元化程度,中小银行则应重视提高资产规模与收入多元化交叉影响对银行风险的控制效用。     

从跨文化视野看语用失误

语用失误是异文化冲突的常见现象。本文从语用学的角度出发,通过列举大量语用失误的案例,分析了跨文化交际中语用失误的种种原因,以期在注重语言知识的同时,避免不必要的交际失当和交际误解,从而提高英语综合应用能力。     

两岸金融合作路径研究--基于福建自贸区的案例

两岸金融合作一直是两岸经贸合作、文化交流的一个重要支撑和议题,然而由于政治障碍等因素,两岸金融合作仍存在诸多限制。文章在梳理两岸金融合作的历史进程后,基于目前两岸金融合作的困境,以福建省自贸区成立为新契机,解析自贸区成立的相关政策可能给两岸金融合作带来的新路径。     

相互投资与人力资本投资对研发外包决策影响研究

本文运用产权理论模型,通过分析最优和次优两种状态下企业和研发机构的均衡投资水平,重点讨论企业和研发单位自我投资和相互投资对研发外包决策的影响,并通过进一步揭示物质资产与人力资产在研发外包中的作用,提出根据专用性投资的特点调整研发外包策略,继而实现最优的研发效果。研究结果表明:相互投资弹性更高的一方更应该拥有外包的所有权;企业应根据双方相互投资的投资弹性高低调整研发外包策略;外包项目中人力资本投资比物质资本投资更重要。研究结果对企业有效利用研发外包进行创新提供了有力的理论指导。     

浅埋小净距隧道下穿多股铁路的风险分析及对策

以石家庄地铁1号线张西区间下穿铁路既有线工程为依托，针对其浅埋、小净距、下穿铁路风险高等工程特点，分析风险产生的原因及危害，提出实施洞内控制、地层控制及既有铁路控制的分项控制对策。实践证明，风险分析合理，对策有效，隧道施工及铁路运营安全可控，可为类似工程提供参考。     

Exploring the Bidirectionality of Emotion Understanding and Classroom Behavior with Spanish‐ and English‐speaking Preschoolers Attending Head Start

The present study investigated time‐dependent relationships between emotion understanding and the behavioral adjustment of preschoolers over a single school year using a latent variable structural equation modeling framework. Teacher reports of child behavior (hyperactivity, emotion symptoms, conduct problems, peer problems, and prosocial behavior) and performance assessments of emotion understanding were obtained twice at a 6‐month interval for a sample of 281 preschoolers (159 boys and 122 girls, with mean age = 52.40 months) from English‐ (N = 158) and Spanish‐speaking (N = 123) backgrounds. Emotion understanding and behavior were stable over time, and cross‐sectional associations between them were in expected directions. Cross‐lagged paths revealed that the behavior variables significantly associated with emotion understanding across time were hyperactivity, emotion symptoms, and peer problems, and that behavior variables were generally better predictors of emotion understanding than vice versa. Differences across gender and language groups suggest a stronger and more complex bidirectional relationship between emotion understanding and behavior for girls and for Spanish‐speaking children compared wth boys and English‐speaking children. Results are discussed with respect to the value of exploring cross‐lagged relationships and the potential importance of gender and culture as determinants of those relationships.     

中国商业银行资本缓冲的周期性研究——基于16家上市银行的实证分析

基于中国16家上市银行2000—2013年的非平衡面板数据, 使用Driscoll和Kraay(1998)的方法对中国商业银行的资本缓冲与经济周期之间的关系进行再检验, 并且考虑银行之间可能存在空间截面自相关问题, 实证结果显示:经济周期缺口系数显著为正, 商业银行规模系数显著为负, 贷款损失拨备系数为负但不显著。研究结果表明:中国商业银行资本缓冲存在一定的逆周期性;商业银行“太大而不能倒”理论不适用于中国现实情况;贷款损失拨备计提不仅基于利润理论, 也会受到成本费用理论的影响, 这两个理论之间的权衡造成贷款损失拨备系数并不显著为负。     

Call Home? Mobile Phones and Contacts With Mother in 24 Countries

This article explores how the diffusion of mobile phones is associated with communication between adult children and their mothers. The article analyzes 2001 International Social Survey Program data from 24 countries (N = 12,313) combined with the country‐level data on the prevalence of mobile phones. Net of individual‐level predictors and country wealth, adult children who resided in countries with high prevalence of mobile phones contacted their mothers more frequently. High prevalence of mobile phones was also associated with larger differences in maternal contact by gender and smaller differences by education. These findings suggest that any impact of new communication technology on intergenerational relations is complex.     

Changes in the Satisfaction of Cohabitors Relative to Spouses Over Time

Family scholars have noted a gap in the subjective well‐being of cohabitors relative to spouses and have hypothesized that the size of this “cohabitation gap” varies depending on how far cohabitation has diffused in a society. For the first time we test this hypothesis across time in a single country, Italy, by analyzing 20 cross‐sectional, nationally representative surveys collected from 1993 to 2013 by the Italian Institute of Statistics (N = 279,190 partnered young adults). We find that differences in the assessments of family satisfaction between cohabitors and spouses have eroded over the years and that there has been no detectable cohabitation gap since 2011. In addition, we illustrate that the weakening of the cohabitation gap is attributable to the diffusion of cohabiting unions in Italian society.