水源地突发水污染政府应急预留水量需求预测

近年来,随着工业化和产业化的快速发展,水源地突发水污染事件频发。为应对紧急情况下的水资源非常规需求,保障经济社会稳定发展,政府需要安排一部分应急预留水量。如何合理预测政府应急预留水量的规模是一个值得探讨的课题。提出了一种基于案例推理技术的政府应急预留水量需求预测方法,具体思路是:借助于案例库,利用主成分分析法从众多影响水源地突发水污染事件的因素中提取出两两不相关的因子,以此作为案例的特征属性,基于加权曼哈顿距离测算相似度,依此得到匹配案例,进而测算政府应急预留水量。以太湖流域常州地区水源地为例,进行政府预留水量需求量的预测与分析。该方法可以为政府应急预留水量的配置、储备等提供相关理论知识。     

一种改进的非凸秩最小化算法及其在矩阵恢复中的应用

在分析现有处理矩阵恢复问题的非凸秩最小化算法的基础上,提出了一种基于超松弛迭代的改进算法,并给出了松弛因子ω的确定准则。仿真实验表明:在惩罚参数选取较大的情形下,改进算法较原算法具有更快的收敛速度及更高的收敛精度,同时展示了基于非凸秩最小化算法的矩阵恢复技术在图像去噪中的应用。     

Advertising a second-price auction

This study examines a symmetric private-value second-price auction model in which the seller solicits bidders at a cost, sets a reserve price, and receives a payoff which is a convex combination of revenue and welfare. The bidder’s valuations are drawn from a distribution with a decreasing hazard rate and non-decreasing virtual valuations. We find that at equilibrium the seller adopts an advertising policy which minimizes the uncertainty over the number of participants, and sets a reserve price which only depends on the distribution of valuations and the weight on revenue in the objective function. A welfare-maximizing seller is shown to advertise more than a revenue-maximizing seller, and a ceteris paribus increase in the advertising level is proved to increase the expected winner’s rent.     

Developing globally responsible leaders: What role for business schools in the future?

This paper reports on a collaborative research process to explore the future role of business schools in the development of globally responsible leaders. Swinburne University of Technology held a collaboratory workshop of academics across disciplines and a range of business leaders to explore firstly what a globally responsible leader would look like and secondly how these capabilities would be developed. In taking forwards actions from the workshop, the Business School was noticeably absent which raised the specific question regarding the on-going role for business schools in the future development of leaders, and how they would need to change in order to maintain a future role in this sphere. The paper reflects on the transformative process necessary within business schools if they are to meet this future agenda.     

Regulators’ and stakeholders’ perspectives in a framework for bioenergy development

In this study, ten bioenergy crop rotations (corn, corn-stover, sorghum, soybean, corn-soybean, corn-soybean-canola, corn-stover-soybean, miscanthus, switchgrass, and sorghum-soybean) were selected based on local stakeholder (economically motivated) and regulator (environmentally motivated) preferences. These crops were implemented on diverse landscapes (agricultural, marginal, and agricultural plus marginal lands) one at time for 17 years using a SWAT model of the Saginaw River Watershed in Michigan. The bioenergy crops were evaluated based on 100 percent, 50 percent, and zero percent weight assigned to both stakeholders’ and regulators’ preferences using analytic hierarchy process (AHP), an optimization and decision-making technique that aims to satisfy multiple conflicting objectives. The corn-soybean-canola rotation was selected in all landscapes based on economic benefits (stakeholders’ preferences). Meanwhile, perennial grasses (miscanthus and switchgrass) were selected based on environmental benefits (regulators’ preferences), because they maintain permanent cover, require fewer inputs than traditional row crops, and are less management intensive. When implementing bioenergy crops on marginal lands, pollution generation greatly increased at the field level, indicating that these lands are likely not viable for bioenergy crop production to meet potential future renewable energy demand.     

基于量子三叉树的量子Black-Scholes期权定价

将量子概率引入到期权定价是最近几年一个新的研究趋势,也称为量子金融.为了期权定价更方便,文章建立了量子三叉树模型,同时利用量子概率建立了连续量子Black-Scholes(B-S)模型。实例应用和Matlab期权敏感性分析都验证了量子B-S优于经典B-S,从而为连续期权定价提供量子决策的途径。     

New technology and old institutions: An empirical analysis of the skill-biased demand for older workers in Europe

Using panel data from nine European countries over the period 1970 to 2007, we examine the impact of information and communication technology (ICT) on the demand for older workers (aged 50 and over). We find evidence of a decrease in demand for older workers in the 1970s and 1980s. It can be argued that the impact of ICT on demand for older workers is skill-biased. However, the skill-biased demand for older workers is mainly reflected in the skill-biased changes in employment shares rather than relative wages. There is some evidence of a gradual deskilling of older workers. We find that labour market institutions such as the national minimum wage, social pacts on wage issues and union density mostly benefit skilled older workers, while coordination of wage setting, extension of collective agreements, social pacts on pensions and centralisation of wage bargaining can alleviate the adverse effects of skill-biased technological change.     

Policy and politics behind Shanghai’s Free Trade Zone Program

China launched the Shanghai Free Trade Zone (FTZ) Program on September 29, 2013 in a bid to reduce administrative interventions, ease restrictions on investments, further open up its financial system, and internationalize its currency to booster shipping, logistics, and commerce. This article aims to present a background of the Shanghai FTZ and some reflections on it. China’s economic reconstruction has made a major impact on its port cities. Competitions between ports are gradually evolving into competitions between supply chains, with ports no longer considered as isolated links in the transport chain but rather as integral links in the supply chain. Ports are transitioning into fourth-generation ports with the establishment of logistics and value-added activities, which are developed in conjunction with local industrial and service businesses. In this trend, China’s port cities can provide a wide range of value-added services and become centers of commodity flow, capital flow, and information flow. Specifically, the combined effects of driving the development of peripheral industries and actively coordinating the activities of relevant parties help regulate the operations of the entire supply chain to obtain potential value-added benefits. The implementation of the Shanghai FTZ will not only stimulate trade but will also bring increased shipping and finance opportunities to the city. With free trade as the new direction and focus of the country’s economic initiatives, the Shanghai FTZ will hopefully lay the groundwork for a new round of reforms and restructuring of the Chinese economy.     

The impact of firm-provided training on productivity,wages, and transition to regular employment for workers in flexible arrangements

This paper examines the incidence and density of firm-provided training for workers in flexible work arrangements – i.e., non-regular employees who are working part-time or with fixed-term employment contracts – and analyzes the effect of this training on skills, productivity, and wage growth, using a unique survey of Japanese workers. Among non-regular employees, those who work on a full-time basis are found to receive a higher density of both on-the-job training (OJT) and off-the-job training (Off-JT). Participation in firm-provided training is shown to improve job skills and productivity, but does not appear to impact the wage growth of non-regular workers. However, training participation is shown to make the transition from non-regular to regular employment in the current occupation more likely, enhancing the probability of future wage increases.