风险分析在食品安全管理中的应用研究

通过对风险评估、风险管理和风险交流过程的阐述介绍了风险分析理论及其在我国食品安全管理中的应用意义,并利用食品安全评估指数,给出了基于食品安全指数评估模型的评估流程,以期提高我国食品质量安全管理水平,实现食品安全的风险预警和应急管理.     

Gaps between managers' and employees' perceptions of work–life balance

Research on work–life balance (WLB) practices has increased in recent years. Academics affirm that the implementation of WLB practices helps to achieve better organizational results and improve employee outcomes such as higher satisfaction and commitment, and reduce turnover intentions. However, some authors have argued that there are differences between the availability of WLB practices in companies and employees' perceptions of access to such practices. The literature on the differences in perceptions between managers and employees in relation to WLB and its effects is sparse. Using two samples of 229 managers and 511 employees from the same firms, we in this paper contribute to our knowledge of the existence of the perception gaps between managers and employees and their influence on the take-up of WLB. Implications for academics and practitioners are discussed.     

Supervisor and coworker support: a source congruence approach to buffering role conflict and physical stressors

The buffering effects of supervisor support on the stressor–strain relationship have proven elusive in prior research (Beehr, Farmer, Glazer, Gudanowski and Nair (2003), ‘The Enigma of Social Support and Occupational Stress: Source Congruence and Gender Role Effects,’ Journal of Occupational and Health Psychology, 8, 220–231). We built on emerging work on source congruence and conservation of resource theory to test a series of hypotheses intended to clarify these mixed findings. Using a sample of 768 employees from 45 organizations in North America, results from moderated regression analyses, showed that the effects of supervisor support on the stressor–strain relationship depended on source congruence. In accordance with our predictions, although we found buffering effects for the physical stressors–strain relationship, we found a reverse buffering effect for the role conflict–strain relationship. These differential buffering effects did not emerge when considering coworker support. We discuss the implications of our results for shedding light on the mixed evidence regarding buffering work stressors reported in prior research.     

Recursive utility with unbounded aggregators

A new framework is presented for the study of the existence and uniqueness of solutions to the Koopmans’ equation in the unbounded case, that is based on the contraction mapping approach. In the bounded below case with bounded consumption streams, uniqueness of the solution in the whole class of weak-star continuous utility functions is obtained. When the aggregator is unbounded below and/or consumption streams are unbounded, existence of a weak-star continuous solution is shown, and a simple criterium to check the sufficient conditions for existence is provided. Juan Pablo Rincón-Zapatero and Carlos Rodríguez-Palmero gratefully acknowledge financial support by the Ministerio de Educación y Ciencia and FEDER funds under Research Projects MTM2005-06534 and SEJ2005-08709/ECON, respectively, and by Consejería de Educación de la Junta de Castilla y León under Research Projects VA99/04 and VA017B05, respectively. This paper has substantially benefited from the comments of an anonymous referee. Particular and special thanks are due to Robert Becker for his very helpful comments and valuable suggestions.     

我国西部大开发战略实施效果的阶段性评价与改进对策

利用统计数据,选取宏观经济水平、工业化发展进程、居民生活质量和生态发展状况等四大类指标对中国西部大开发战略实施10周年的政策效果展开系统评价。研究发现,尽管西部大开发战略促进了西部地区社会经济发展指标的全面好转,但东西部之间区域经济发展不均衡的系统格局并未改观,反而呈现进一步恶化趋势。因此提出了未来10年西部大开发战略向纵深推进的具体对策,比如增强东西部地区间产业联结与优势互补、强化西部各省域间经济发展的联动效应、西部投资应注重"点面结合、以点带面"等。     

公司增发与市值管理——基于中国A股上市公司的实证研究

采用2005—2014年中国A股有增发股份记录的上市公司的市场数据,检验了被广泛讨论的市值管理现象。结果表明:所有权性质、增发目的、增发对象、经营状况以及市值存在差异的上市公司,在其增发股份前后及期间的超额收益率和股价信息含量存在很大差异,这些差异与不同公司进行增发的诉求一致。这说明,中国A股市场广泛存在服务于公司控制人的市值管理行为。由于这些市值管理行为可能包括控制股价和侵害其他投资人,因此监管层应制定更为严格的法规来规范市值管理行为。     

一种治疗烧烫伤软膏的制备

烧烫伤是临床最常见的损伤,本文介绍了一种能减轻创面疼痛,透气性好、易于涂布的烧烫伤软膏的制备过程。     

Detecting big structural breaks in large factor models

Time invariance of factor loadings is a standard assumption in the analysis of large factor models. Yet, this assumption may be restrictive unless parameter shifts are mild (i.e., local to zero). In this paper we develop a new testing procedure to detect big breaks in these loadings at either known or unknown dates. It relies upon testing for parameter breaks in a regression of one of the factors estimated by Principal Components analysis on the remaining estimated factors, where the number of factors is chosen according to Bai and Ng’s (2002) information criteria. The test fares well in terms of power relative to other recently proposed tests on this issue, and can be easily implemented to avoid forecasting failures in standard factor-augmented (FAR, FAVAR) models where the number of factors is a priori imposed on the basis of theoretical considerations.     

综合治疗方案在中晚期宫颈癌中的应用

观察综合方案治疗中晚期宫颈癌的近远期疗效,探索这一治疗方案在中晚期宫颈癌治疗中的应用价值。     

黑山铜镍硫化物矿床成因与预测

长久以来甘肃北山地区一直就是基础地质和矿床地质理论研究以及找矿勘查热点,本区横跨3个不同的大地构造单元,区内前寒武纪和古生代地层出露广泛,构造形迹复杂,岩浆岩发育,金属矿床星罗棋布。文章从区域地质、矿床地质、矿床成因等因素,对甘肃肃北黑山铜镍硫化物矿床进行分析,根据本区的实际情况,对黑山矿床含矿超基性岩体的形成与空间展布规律进行新的研究判断,为未来找矿工作的思路和方向提出有益的见解及观点。