一种基于均流系统的并联型直流屏

基于均流系统的并联型直流屏,属于电力操作电源的一种,与传统直流屏相比,所需电池数量大大减少,占地面积小,增加对电池的自动活化功能,控母跟合母可互为备用,彻底改变传统直流屏必须固定电池数量以及控母和合母的电压等级不一致的弊端。文章结合现代电力系统的特点,通过对基于均流系统的并联型直流屏和传统直流屏的技术设计原理和应用的比较来进行阐述。     

基于ARMA（p，q）模型的企业年金精算研究

传统的保险精算理论为了简化计算,往往假定利率是确定的。但由于企业年金是一种长期的经济行为,投保期间的政府政策、经济周期等因素都会造成利率的不确定性,从而随机利率下企业年金理论的研究逐渐成为保险精算学研究的重点与热点问题之一。本文利用时间序列理论,将常用的利息力模型AR(p)和利息力模型MA(q)进行推广,对各年的利息力δi(i=1,2,…)建立广义条件下的ARMA(p,q)模型,得出此类模型下企业年金的精算现值。最后,根据所建立的模型和所得到的精算现值进行了实例计算分析。     

The paradoxical mechanisms of high‐performance work systems (HPWSs) on perceived workload: A dual‐path mediation model

We invoke conservation of resources theory to present an integrative model that simultaneously examines the positive and negative effects of employee‐experienced high‐performance work systems (experienced‐HPWSs) on perceived workload (PW). Analysis of three‐wave, time‐lagged data from 368 employees of four major state‐owned commercial banks in China revealed that experienced‐HPWSs positively predict perceived organisational support, which in turn decreases PW. Experienced‐HPWSs positively predict psychological empowerment, which in turn increases PW. The positive influence of psychological empowerment on PW is stronger than the negative influence of perceived organisational support on PW, indicating that resource loss is more salient than resource gain. This dual‐path mediation model increases our understanding of the mechanisms through which HPWSs influence PW and highlights the coexistence of opposite impacts during the process.     

The impact of political instability on risk‐taking in the banking sector: International evidence using a dynamic panel data model (System‐GMM)

This paper contributes to the existing literature by investigating the impact of political instability risk on risk‐taking in the banking sector of 75 countries, which is the first attempt for this nexus to the best of our knowledge. The dynamic panel data model (System‐GMM) showed that political instability risk significantly increases risk‐taking in the banking sector. Besides, corruption levels and government ineffectiveness are the most important channels of political instability that affect the banking sector risk. The results also actively support the “too big to fail” hypothesis. Finally, the robustness results confirm the conclusions derived from the baseline System‐GMM model.     

The impact of the Financial Institutions Reform, Recovery, and Enforcement Act (FIRREA) on the value of S&L stocks

This study examines the effects of the Financial Reform, Recovery, and Enforcement Act of 1989 on the stock returns to shareholders of publicly traded savings and loans (S&Ls). Abnormal returns to stockholders are measured in response to each new piece of information concerning the passage of the Act. Using weekly data to have the largest possible sample, we found two significant time periods: a) the initial announcement of the Act and b) the time of passage and signing of the Act into law. We also provide evidence that stock return behavior differed between large and small S&Ls.