浅析我国GDP增长中的风险因素

我国经济高速增长过程中存在许多问题，现行的GDP不能反映自然与环境之间的平衡，应将经济过程对资源环境的作用作为经济产出的投入加以核算，最终获得当期经资源环境因素调整之后的GDP，即绿色GDP。     

Aggregate play and welfare in strategic interactions on networks

In recent work by Bramoullé and Kranton (2007), a model for the provision of public goods on a network was presented and relations between equilibria of such a game and properties of the network were established. This model was further extended to include games with imperfect substitutability in Bramoullé et al. (2014). The vast multiplicity of equilibria in such games along with the dramatic changes in equilibria with small changes in network structure, makes it challenging for a system planner to estimate the maximum social welfare of such a game or to devise interventions that enhance this welfare. Our main results address this challenge by providing for arbitrary networks, close approximations to the maximum social welfare and the maximum aggregate play in terms of only network characteristics such as the maximum degree and independence number. For the special case when the underlying network is a tree, we derive formulas which use only the number of nodes and their degrees. These results allow a system planner to assess aggregate outcomes and design interventions for the game, directly from the underlying graph structure, without enumerating all equilibria of the game, thereby significantly simplifying the planner’s problem. A part of our results can be viewed as a logical extension of Pandit and Kulkarni (2018) where the maximum weighted aggregate effort of the model in Bramoullé and Kranton (2007) was characterized as the weighted independence number of the graph.     

Cartel formation and managerial incentives

We study the formation of cartels within two different contexts. First, we consider internal–external stability based models which, due to firms’ free-riding incentives, lead to the inexistence of stable cartels. Second, we introduce the dynamic aspect of coalition formation. That is, when considering a cartel we consider also any cartel that can be reached through a succession of moves. Despite firms’ free-riding incentive, the dynamic process predicts that the collusion of the whole industry can occur with some regularity. We show that free-riding incentives decrease and incentives to merge increase when firms’ owner delegate production decisions to managers.      

基于粗集理论的战略联盟合作伙伴选择研究

粗集理论是一种新兴的数据处理方法,在许多研究领域已得到了应用。在对粗集理论进行深入研究的基础上,探讨了其在战略联盟合作伙伴选择中的应用并总结出相应的决策规则,为企业选择战略联盟合作伙伴提供参考。     

Absorbing sets in roommate problems

We analyze absorbing sets as a solution for roommate problems with strict preferences. This solution provides the set of stable matchings when it is non-empty and some matchings with interesting properties otherwise. In particular, all matchings in an absorbing set have the greatest number of agents with no incentive to change partners. These “satisfied” agents are paired in the same stable manner. In the case of multiple absorbing sets we find that any two such sets differ only in how satisfied agents are matched with each other.     

粗糙集在客户细分系统中的应用

利用不完备信息系统的粗糙集有关方法实现客户细分系统中客户个性化需求的挖掘过程,并对建模过程的主要步骤和关键问题作详尽的阐述,通过对客户个性化需求的分类进行分析和归纳可以发现影响企业实施销售战略的关键需求及其相关知识,企业可以根据挖掘结果,调整其经营策略,提升企业竞争力。应用实例表明:该模型是合理和可行的。     

Bi-criteria solid transportation problem with substitutable and damageable items in disaster response operations on fuzzy rough environment

Successful planning and scheduling of relief operations play a key role in saving lives and reducing damage in disasters. These disaster operations involve a variety of challenging multi-objective optimization problems, for which soft computing methods are well suited. In this investigation, relief materials and human resources are transported from some distribution centers (DCs) to some delivery points (DPs) through conveyances. The objectives are to minimize both total cost and time for transportation. Some particular models for (a) substitutable items (b) damageable items and (c) safety Factor have been derived. To convert bi-criteria solid transportation problem into a single objective problem, three different techniques (i) Fuzzy interactive satisficing method, (ii) Global Criterion Method and (iii) Convex Combination Method are used. Then the reduced single objective problem is solved by a non-linear optimization technique – Generalized reduced gradient method using LINGO-14.0. The models are illustrated through some numerical examples and optimal results are presented in tabular forms.     

Fuzzy evaluations applied in analysis of infrastructure development based on national competitiveness perspectives

Policy makers often need to determine which key projects should be prioritised for national infrastructure investment. In this light, this research uses the evaluating indicators for infrastructure as found in the World Competitiveness Yearbook and proposes a leading and lagging fuzzy score graphics-based model to achieve the following objectives: a) distinguish the leading and lagging degree of each indicator more accurately; b) assist policy makers to find out the strongest and the (relatively) weakest infrastructure items and c) highlight the key fields of national infrastructure that need improvement. Taiwan is used as a case study to test the viability of the model proposed. We show how this methodology will help policy makers to determine the key issues requiring improvement towards the national infrastructure system.     

重型瓦楞包装在发动机出口CKD项目中的应用

传统发动机出口包装大多采用一次性木质包装,不环保、成本高且取用不便。以出口发动机CKD项目为例,基于绿色包装理念,选用重型瓦楞包装,以纸代木,对发动机重新进行集合包装设计,满足CKD零件的包装防护需求的同时,也实现了绿色环保和降本增效的双重目标。     

基于粗糙集方法的广东省粮食产量影响因素分析

粮食的生产一直受到我国政府的高度关注与重视。农业经济学界已有不少论文对于各省区,采用不同的统计分析方法,来分析粮食生产的主要影响因素,其中最常用的是主成分分析,此方法存在一定的局限性。为了能从大量的、不完全的数据中找到隐含的、有价值的信息,该文总结了广东省的粮食生产概况,选用数据挖掘中的粗糙集方法,以1996～2012年的统计年鉴中的数据为基础,选取了乡村劳动力、耕地面积、农业机械动力、灌溉面积、化肥用量等17项与广东省粮食产量相关的因素进行分析。研究结果表明,对于广东省粮食产量影响较大的因素有化肥用量、水库总容量以及人均经营耕地面积。从分析来看,近年来广东省粮食产量并未随着化肥用量和水库总容量的增大而增加,但人均经营耕地面积对于产量的增加有着正面影响。针对这些问题,给出了稳定粮食播种面积,改良耕地质量,加强农田水利建设,加大农业科技投入,转移农村富余劳动力的建议。