Planning the delivery of relief supplies upon the occurrence of a natural disaster while considering the assembly process of the relief kits

Models for the distribution of relief supplies often assume immediate availability of relief items upon the occurrence of a natural disaster. However, such an assumption does not always apply in realistic settings. In some cases, at least it is necessary to assemble relief items into kits before distributing them among the affected population. This paper presents a rolling horizon methodology that considers dynamic parameters such as demand, capacities and demand priorities for the problem of distributing relief supplies after the occurrence of a natural disaster by including such assembling activities before the delivery.     

Venture capital trusts and the expiration of IPO lock-up provisions

Venture capital trusts (VCTs) were introduced to provide private equity capital for small expanding companies and to promote innovation. Investors in initial public offerings are rewarded with tax relief on the cost of lock-up provisions to stabilize the market. This paper examines the market reaction and trading activity around the expiration of lock-up provisions of 148 VCTs listed on the London Stock Exchange from 1995 to 2006. Downward-sloping demand curve theory suggests that an increased supply of VCT shares at the expiry date could shift their value to a new equilibrium at a lower price. Supporting this prediction, we document evidence of negative abnormal returns as well as permanent increases in the price discount relative to net asset value and trading volumes at and around the expiries of the required holding periods of VCTs. In addition, less negative abnormal returns, lower abnormal discounts and lower abnormal trading volumes are associated with VCTs that invest in AIM-listed companies due to lower information asymmetry, that experience lower prior performance due to a less pronounced disposition effect, and that are subject to a shorter lock-up horizon or are offering more generous tax benefits.     

欧盟海关同盟战略及其执行评析

摘要：海关同盟是欧盟的三大支柱之一，也是欧盟单一市场的基石。因此，欧盟一直通过其海关同盟战略及其各类实施工具来强化有效、高效、统一、协调的海关联盟。在三十年的海关同盟演进过程中，欧盟海关同盟战略都是承接并贡献于欧盟总体经济规划目标。在其三项海关同盟战略之间以及海关同盟战略与海关行动计划之间存在着延续与发展的关系。为了实现欧盟海关战略目标，欧盟采取了软硬结合的开放协调机制以实施其战略。     

大学生就业现状与高校教育收费的相关关系研究

近些年,大学生就业难已经成为社会所密切关注的问题之一.最近在对大学生就业难问题原因的探讨上,部分学者认为源于教育高收费,“成本困境”才是困扰大学生就业的真正致因抑或“瓶颈”.针对此种观点,本文在实证分析的基础上发现教育收费高并不是导致我国大学生就业难的根源,教育收费并不是大学生就业难的Granger原因,它只与我国大学生就业存在一定程度的负相关,并且这种相关性较弱,而学费高问题应由我国政府投入加以解决.     

营改增背景下企业办税人员素质现状及提升路径

当前不断推进的营改增对企业税务管理工作提出了更高要求,对企业办税人员素质形成了新的考量。本文分析了营改增背景下税企双方对企业办税人员的素质要求,结合地方企业办税人员的素质现状,探究其影响因素。提出应严格企业办税人员准入制度,建立配套的职称晋升和有效的激励机制,为办税人员营造良好的职业发展空间,促进其综合素质的全面提升,为地方经济发展助力。     

Designing successful temporary loyalty programs: An exploratory study on retailer and country differences

Retailers increasingly adopt temporary loyalty programs (TLPs), in which consumers have limited time, often less than half a year, to save stamps and redeem highly discounted rewards. These programs often run alongside the retailers’ permanent loyalty programs in an attempt to increase customer engagement. Despite the growing popularity of TLPs, the literature on the topic remains limited. We address this gap by looking at the redemption rate, the industry’s primary success indicator, of almost 900 TLPs across a broad set of grocery retailers in 45 countries. We study the effects of four key design characteristics (the duration of the program, the discount offered, the spending requirement before an award can be redeemed, and the reward depth) on the redemption rate, and explore how these effects vary across a broad range of retailer and country characteristics. In doing so, we control for both a retailer’s potential self-selection into running a TLP and the potential endogeneity of the subsequent design choices. We derive a set of actionable results on how to design successful TLPs and show that high redemption rates are not only beneficial for the program operator and reward manufacturer, but also translate into higher sales and profit for the retailer.     

定时器的PLC程序设计

本文旨在实现接通延时定时器、断开延时定时器、多谐震荡器的时序图及PLC程序设计。     

A Generalized Nash Equilibrium network model for post-disaster humanitarian relief

We develop a Generalized Nash Equilibrium network model for post-disaster humanitarian relief by nongovernmental organizations (NGOs). NGOs derive utility from providing relief supplies to victims of the disaster at demand points in a supply chain context while competing with each other for financial funds provided by donations. The shared constraints consist of lower and upper bounds for demand for relief items at the demand points to reduce materiel convergence or congestion. This game theory problem is reformulated as an optimization problem and numerical examples and a theoretical case study on Hurricane Katrina given.     

含硫油气井中的硫化氢气体检测和防护应急程序

文章详细分析了含硫油气井勘探开发中硫化氢气体产生的来源、硫化氢的主要检测方法,并重点论述了防护硫化氢的应急管理程序。     

构建高等职业教育教学信息收集体系

本文介绍了西安航空职业技术学院教学信息收集体系的具体操作办法,阐述了建立这一体系对人才培养质量的提高起到了积极作用。