The best way of bilateral special economic zone to Sino-Vietnam economic cooperation

The Bilateral Special Economic Zones is a new idea about economic co-operation ways. It is going to be set by both countries with a common boundary for promoting the economic co-operation between two sides. It can be firstly set along the boundary between China and Vietnam. It will promote the economic co-operation between them, but China and ASEAN. It can be set along the Chinese boundary with the neighboring countries and will promote the economic co-operation between the both sides for setting up a better environment around China.     

会计师事务所与客户的双边匹配

以2013年至2018年A股上市公司及为其提供审计服务的国内会计师事务所为研究样本,基于双边匹配理论探讨了审计市场中会计师事务所与企业之间的匹配情况对审计质量和审计风险的影响。研究结果表明,综合实力较强的会计师事务所倾向于与综合实力较强的企业进行匹配,呈现出审计双方综合实力相当的一种正向类聚匹配：当双方匹配程度越高时,企业可操纵性应计利润较少,审计质量越高;同时,当审计双方匹配度越高时,审计风险越低。上述结果证实了审计市场上会计师事务所与客户匹配的有效性和重要性,并对通过双边匹配提高会计师事务所的审计质量、降低审计风险,为审计市场资源优化配置提供了理论指导。     

实时OD估计中卡尔曼滤波算法研究

ITS研究中，动态OD矩阵估计是交通动态分配的关键因素。针对OD矩阵难以获得的问题，回顾动态OD矩阵估计理论的发展历程，明确该领域研究中的三个关键问题：状态变量的选择、系统方程的确定、OD量与路段流量的关系（分配矩阵）。在此基础上介绍一种基于历史OD矩阵数据的估计方法，卡尔曼滤波算法，为动态OD矩阵估计理论的进一步的研究奠定基础。     

从"10+3"看东亚区域经济合作的方式

东亚区域合作面临许多难题，贯穿“东盟方式”的“10 3”合作是东亚目前的主导形式，但这一合作的诸多缺憾使东亚区域合作很难沿这一方向深入下去。2002年初，小泉纯一郎在新加坡描述了一个称为“东亚共同体”的设想，实际是鼓吹以双边自由贸易协定网而非区域经济一体化的方式来实现东亚的区域合作。的确，双边自由贸易协定网的方式不但符合东盟强调自立的合作原则，也迎合了外部特别是美国在这一地区的利益，易为各方接受，却从根本上堵住了东亚通往更具机制化合作的道路。笔者认为东亚区域合作的必然选择是大国协调为基础的区域经济一体化，这虽然需要一个艰难的调整过程，但却是在全球化条件下保障东亚各国利益的惟一选择。     

俄罗斯石油工业与中俄双边合作

中国和俄罗斯是两个比邻大国，俄罗斯是世界最大的石油生产国和出口国之一，中国则已成为世界最大的石油消费国和进口国之一。近年来，俄罗斯石油工业稳步发展，并在石油市场全球化进程不断加强的趋势下，凭借其丰富的资源和不断增长的出口量，正在国际市场上发挥着越来越重要的作用。从地缘政治的角度出发，大力发展两国石油领域的合作是“双赢”之举，尽管目前合作的基础十分薄弱。该文在对俄罗斯石油工业现状和未来发展态势分析的基础上对我国未来石油供需形势作出客观评估，进而针对中俄石油领域合作提出了若干措施。     

Personalized multi-period tour recommendations

During a trip planning, tourists gather information from different sources, select and rank the places to visit according to their personal interests, and try to devise daily tours among them. This paper addresses the complex selection and touring problem and proposes a “filter-first, tour-second” framework for generating personalized tour recommendations for tourists based on information from social media and other online data sources. Collaborative filtering is applied to identify a subset of optional points of interest that maximize the potential satisfaction, while there are some preselected mandatory points that the tourists must visit. Next, the underlying orienteering problem is solved via an Iterated Tabu Search algorithm. The goal is to generate tours that contain all mandatory points and maximize the total score collected from the optional points visited daily, taking into account different day availabilities and opening hours, limitations on the tour lengths, budgets and other restrictions. Computational experiments on benchmark datasets indicate that the proposed touring algorithm is very competitive. Furthermore, the proposed framework has been evaluated on data collected from Foursquare. The results show the practical utility and the temporal efficacy of the recommended tours.     

The European refugee crisis and the natural rate of output

The European Commission follows a harmonized approach for calculating structural (potential) output for EU member states that takes into account labour as an important ingredient. This article shows how the recent huge migrants’ inflow to Europe affects trend output. Due to the fact that the immigrants immediately increase the working population but effectively do not enter the labour market, we illustrate that the potential output is potentially upward biased without any corrections. Taking Germany as an example, we find that the average medium-term potential growth rate is lower if the migration flow is modelled adequately compared to results based on the unadjusted European Commission procedure.     

PRICE SETTING OF MARKET MAKERS: A FILTERING PROBLEM WITH ENDOGENOUS FILTRATION

This paper studies the price‐setting problem of market makers under risk neutrality and perfect competition in continuous time. The classic approach of Glosten–Milgrom is followed. Bid and ask prices are defined as conditional expectations of a true value of the asset given the market makers' partial information that includes the customers' trading decisions. The true value is modeled as a Markov process that can be observed by the customers with some noise at Poisson times. A mathematically rigorous analysis of the price‐setting problem is carried out, solving a filtering problem with endogenous filtration that depends on the bid and ask price processes quoted by the market maker. The existence and uniqueness of the bid and ask price processes is shown under some conditions.     

动液面谱减法滤波

动液面滤波是油井检测动液面的关键技术之一。文章利用谱减法处理油井动液面信号,消除背景噪声的影响,并改进谱减法应用到动液面滤波,取得较好的滤波效果,从而提高对液面反射波位置的辨识能力。