阿克顿政府观浅析

阿克顿的思想中蕴含着许多天主教哲学思想,其中"政府观"就是自由派天主教思想在政治学领域的表述。这一观点既是对宗教自由主义思想、德林格的学术自治思想和欧洲哲人梭伦、伯里克利、伊壁鸠鲁的国家治理思想的承继,又是在其所处动荡年代的一种创造性的发展。对阿克顿这一思想的探讨,对于加深国家构建中的政府理论具有积极的学术价值和时代意义。     

20世纪30年代上海社会生活的缩影——析1933年《申报》副刊《申报自由谈》上的广告

报纸作为后人观察当时人们生活的一个窗口,报纸广告是其中极具社会学研究价值的一个视角。以旧上海时期的中国名报《申报》的副刊《申报自由谈》1933年所登载的广告为个案进行分析,剖析在新旧文化、中西文化交融汇合时期中国人的心态及当时的社会生活状态。     

The not-so-free agent: Non-performance factors that contribute to free agent compensation premiums

In this study, the authors examine Major League Baseball free agency to identify whether certain factors beyond a player’s on-field performance contribute to contract premiums. These premiums are considered to be the difference between the compensation a player receives in free agency and the marginal revenue product (MRP_t-1) in their contract year. Using 345 free agent transactions over a four-year period (2012–2015), the authors examine the relationships between potential free agent contract premiums and the attributes of a player’s previous team, as well as how contract premiums may be influenced by the level of interest from other teams and certain facets of the acquiring teams. Results suggest that free agents tend to receive compensation premiums when they played for a successful team during their contract year. Playing for a large-market team during their contract year also influenced contract premiums. In addition, free agents tended to realize compensations premiums when multiple teams were bidding for their services, the acquiring teams were in playoff contention the prior year, and the acquiring teams possessed relatively more financial resources. Findings shed additional light on how factors peripheral to a player’s on-field performance may influence the free agency market. Recommendations include that effective control mechanisms are necessary to ensure free agent compensation is commensurate with the value of the player.     

永磁同步电机速度环的滑模变结构控制

在永磁同步电机解耦数学模型的基础上,本文提出了一种把滑模变结构原理用于永磁同步电机的矢量控制系统的方法。首先详细阐述了滑模变结构的基本原理,然后采用速度环的滑模变结构来取代传统的PI控制,并对两个系统进行了仿真分析,仿真结果证明采用速度环的滑模变结构控制系统确有其优越性。