一类非线性抛物型方程解的熄灭

非线性抛物型方程解的一个重要性质就是解的熄灭现象。它在实际生活中有很广泛的应用。近年来人们利用能量估计法,上下解的方法对非线性抛物型方程的解的熄灭进行了大量的研究。在这里受文献的启发,采用能量估计的方法,讨论了一类抛物型方程初边值问题解的渐进性态,得到了解在有限时间内解熄灭的条件。在此基础上给出了解的能量估计。     

浅论高职高专校企合作的集成管理

校企合作作为较为典型的泛边界网络化组织,无论从学校方面还是从企业方面都存在着集成内力,高职高专院校应当通过优化自身核心技术、优化合作成本及合作环境,促成校企合作平台的搭建和健康发展。     

基于语义的视频镜头检测的研究

由于视频信息量大,内容丰富,使得对其进行有效的管理和检索成为一个困难而又必须解决的课题。在对视频分割算法进行研究的同时,提出一种基于语义的视频镜头检测方法。主要是通过相邻帧之间的差异来判断是否存在镜头切换。实验结果部分对于算法性能进行了测试,实验验证该方法是可行的。     

不同企业边界观评析与未来研究展望

企业边界体现了企业的独立性,区隔了企业组织与外部环境。管理实践者和研究者都十分关注企业边界的设定,威廉姆森因为在该问题上的突出贡献而获得2009年诺贝尔经济学奖,但是企业边界的设定理论目前还是一个丛林状态。本文以国外学者已有分类为基础,综述了企业边界研究的效率学派、势力学派、能力学派和身份学派的基础假设、边界的影响因素、影响的理论机制以及各自适用情景等理论核心要素,并对各学派的解释能力和关联性进行分析与比较,最后展望了企业边界未来研究的驱动因素和方向。     

纵向分解与企业边界——基于交易费用理论的分析

企业的纵向分解实质上是产业链纵向关系上的分工,它导致了企业边界的缩小.纵向分解的主要原因在于新的技术与新的管理方法的应用大大削减了市场治理机制的成本.纵向一体化的企业分解后并不是直接回到市场,而是在产业链纵向关系上再次进行整合,形成介于市场和企业之间的中间性组织.     

中俄贸易的现状、问题与对策

中俄两国是友好邻国,在经济上具有很强的互补性,发展中俄贸易,对于构筑两国之间的“面向21世纪的战略协作伙伴关系”具有极为重要的现实意义。但是目前中俄贸易的现状却不尽如人意,双边贸易额太小,且很不稳定。因此,我国必须采取相应的对策和行之有效的措施,从战略的高度积极促进中俄贸易更快的发展,把双边关系建立在坚实的经济基础之上。     

Valuation of American options under the CGMY model

In the present work, we concentrate on the analytical study of American options under the CGMY process. The decomposition formula of the American option and the integral equation for the optimal-exercise boundary are established in explicit forms. Moreover, an analytical approximation formula is obtained for the American value. This approximation is valid when time to maturity is either very short or very long. Numerical simulations are provided for European options, optimal-exercise prices and approximate values for American options.     

Self-Organization and the Role of Government: How and why does self-organization evolve in the shadow of hierarchy?

Self-organization is a concept that is often used to legitimize a government’s retreat from sectors in which it has traditionally played a vital role. In this article, we analyse how the emergence of new welfare services is mutually shaped by factors that stimulate self-organization among citizens and by meta-governing interventions by local governments. Self-organization seems to takes place in the shadow of a government hierarchy: either a fear-based one or a benevolent one. Boundary spanners play an important role in establishing these new arrangements, thereby making use of, and developing, trustworthy relationships between citizen groups and government.     

PORTFOLIO LIQUIDATION IN DARK POOLS IN CONTINUOUS TIME

We consider an illiquid financial market where a risk averse investor has to liquidate a portfolio within a finite time horizon [0, T] and can trade continuously at a traditional exchange (the “primary venue”) and in a dark pool. At the primary venue, trading yields a linear price impact. In the dark pool, no price impact costs arise but order execution is uncertain, modeled by a multidimensional Poisson process. We characterize the costs of trading by a linear‐quadratic functional which incorporates both the price impact costs of trading at the primary exchange and the market risk of the position. The solution of the cost minimization problem is characterized by a matrix differential equation with singular boundary condition; by means of stochastic control theory, we provide a verification argument. If a single‐asset position is to be liquidated, the investor slowly trades out of her position at the primary venue, with the remainder being placed in the dark pool at any point in time. For multi‐asset liquidations this is generally not the case; for example, it can be optimal to oversize orders in the dark pool in order to turn a poorly balanced portfolio into a portfolio bearing less risk.