罐存藤椒油全年品质变化规律的研究

通过测定储存在涂防晒涂料罐体中的藤椒油感官、酸值和过氧化值等指标,掌握存油品质变化规律。结果表明:藤椒油储存过程中香麻味先逐步减弱后麻度开始降低,麻度降低的过程中酸值、过氧化值升高,在1 a罐存期内各项检测指标均符合《绿色食品调味油》(NY/T2111-2011)标准中规定。     

On the assignment of students to topics: A Variable Neighborhood Search approach

This article presents a study of a practical assignment problem found in teaching within higher education. Here, students are assigned to scientific topics for which written papers must be submitted. Often, preferences across topics exist among other side constraints that should be considered in solving the problem of interest. Characterizing attributes of real-world problems were studied for scientific departments in Economics and Business Administration at German universities by sending out 800 questionnaires, and analyzing the 203 responses.Based on earlier studies, a Variable Neighborhood Search (VNS) approach was formulated to solve the resulting assignment problem. Several neighborhood search operators were tested, and numerical results are reported for a range of problem scenarios taken from real-world cases. It was observed that VNS leads to superior results vs. single operator local search approaches. Furthermore, we were able to show that in the studied problem, the effectiveness of certain neighborhoods was, to a large extent, dependent on the structures of the underlying problem.An extension of the problem was formulated by integrating a second objective function, which simultaneously balances the workload of staff members while maximizing student utility. The VNS approach was implemented in a computer system, available free of charge, providing decision support for selected other institutions within higher education.     

关于船员外派法律关系的分析——兼析《船员条例》和《船员注册管理办法》

金融危机席卷全球,进一步证明了经济的全球化趋势,外派劳务市场也未幸免,船员外派作为外派劳务市场的一个重要组成部分,受到了严重的影响。而目前的《船员条例》和《船员注册管理办法》在起到规范作用的同时,也受到了法律效力过低的限制。文中旨在分析船员外派法律关系,更好地去保障船员的权益,并结合《条例》和《办法》去发现其中存在的问题。     

SPECTRUM LICENSING AND FLEXIBLE BEAUTY CONTEST DESIGNS

McMillan's (1995) ‘flexibility’ proposition suggests a testable hypothesis about beauty contests spectrum assignments. Such flexibility purportedly allows regulators to pursue social welfare (network deployment) goals. A separate argument is that more competitive beauty contests enhance the probability of assignment. The study concludes that regulators do indeed focus on societal (network deployment) welfare goals. Initially, consideration is given in the immediate term where licenses are awarded based on operator aftermarket commitments. Subsequently, spectrum package attributes and financial performance obligations, specified in the tender documents, come into play to support the networks spread more widely through the population in a timely manner. Finally, the econometric results suggest that more competitive beauty contests enhance the probability of assignment.     

Regulator flexibility and the administrative allocation licensing of 3G spectrum

Globally, most nations assign radio spectrum to provide 3G mobile services during the period 1999–2007. While there is consensus among most economists that auctions are the preferred assignment mechanism, the assignment mode is split, more or less, equally (in terms of the number of licences issued) between administrative allocations and auctions. With auction procedures tending to raise more revenue for governments (Cartelier, 2003) the question that naturally arises is: why are administrative allocations so popular a method to assign spectrum? McMillan (1995) conjectures that administrative allocations provide additional ‘flexibility’. Accordingly, this study examines the performance of 3G assignments in terms of an econometric analysis of a unique sample of national 3G spectrum administrative allocations. These outcomes are modelled as depending on spectrum package attributes, and post-award network deployment requirements.     

A cost-benefit analysis of the random assignment UK Employment Retention and Advancement Demonstration

This article presents a cost-benefit analysis of Britain’s Employment Retention and Advancement (ERA) demonstration, which was evaluated through the first large-scale randomized control trial in the UK. ERA used a combination of job coaching and financial incentives in attempting to help long-term unemployed men and low-income lone parents sustain employment and progress in work once they were employed. Using both administrative and survey data, ERA’s effects on benefits and costs were estimated through impact analyses, which exploited the experimental design. The findings indicated that ERA was cost beneficial for long-term unemployed adult men, but not for lone parents. The key findings appear robust to sensitivity tests. Uncertainty, as implied by the SEs of the estimated impacts, was addressed through a Monte Carlo analysis, an approach seldom previously used in cost-benefit analyses of social programs.     

高水分稻谷春季通风干燥试验

春季收购的新粳稻谷由于水分偏高,采用在粮库内铁路专用线站台上包打围临时储存,利用二机二风道先行降水到15．5％以后,再转入高大平房仓,利用谷物冷却机平衡水分、粮温,使其安全过夏;与烘干相比,能增收节支,实现高水分粳稻安全储藏,提高粮库经济效益。     

基于航空公司飞机滑行油耗均衡原则的机场停机位分配算法

机位是机场的重要资源,高效、合理的分配机位是机场运行的一个重要环节,也是机场地面作业的一个重要任务。本文建立了以各航空公司飞机滑行耗油均衡的目标机位分配策略,并采用遗传算法进行求解。数据结果证明了模型的和算法的有效性,表明该分配策略具有一定的理论价值和实际意义。     

福建省重点实验室发展研究

基础研究是科技进步的先导,是自主创新的源泉。重点实验室是基础研究的重要力量。本文从福建省重点实验室基本情况出发,对目前重点实验室发展进行综述分析;研究福建省重点实验室发展的思路与目标,在此基础上,分析重点实验室发展的主要任务,最后提出相关的对策建议。