基于社会清洁福利最大化的电热联合双边竞价市场出清优化策略研究

清洁能源利用和可再生能源消纳是区域电-热综合能源系统研究的重点.基于电-热联合双边竞价市场及其供需侧资源报价策略,提出计及能源碳排放和风机弃风的系统运行环境价值成本概念.同时考虑系统供需侧分布式能源站和多能用户利益,构建以社会清洁福利最大化为目标的市场出清策略模型,确定联合市场交易最优策略.通过算例仿真结果表明,所提市...     

在线拍卖截止规则与投标者行为

讨论了在线拍卖网站常见投标者行为,提出了基于投标时间的0-1分布模型,运用博弈论方法,说明了以易趣为代表的固定截止时间在线拍卖模式中,迟投标策略是占优策略.     

Auction-based approach to resolve the scheduling problem in the steel making process

Steel production is an extremely complex process and determining coherent schedules for the wide variety of production steps in a dynamic environment, where disturbances frequently occur, is a challenging task. In the steel production process, the blast furnace continuously produces liquid iron, which is transformed into liquid steel in the melt shop. The majority of the molten steel passes through a continuous caster to form large steel slabs, which are rolled into coils in the hot strip mill. The scheduling system of these processes has very different objectives and constraints, and operates in an environment where there is a substantial quantity of real-time information concerning production failures and customer requests. The steel making process, which includes steel making followed by continuous casting, is generally the main bottleneck in steel production. Therefore, comprehensive scheduling of this process is critical to improve the quality and productivity of the entire production system. This paper addresses the scheduling problem in the steel making process. The methodology of winner determination using the combinatorial auction process is employed to solve the aforementioned problem. In the combinatorial auction, allowing bidding on a combination of assets offers a way of enhancing the efficiency of allocating the assets. In this paper, the scheduling problem in steel making has been formulated as a linear integer program to determine the scheduling sequence for different charges. Bids are then obtained for sequencing the charges. Next, a heuristic approach is used to evaluate the bids. The computational results show that our algorithm can obtain optimal or near-optimal solutions for combinatorial problems in a reasonable computation time. The proposed algorithm has been verified by a case study.     

Forward and Backward Number Translation Requires Conceptual Mediation in Both Balanced and Unbalanced Bilinguals.

It is much debated whether translation is semantically mediated or based on word-word associations at the lexical level. In 2 experiments with Dutch (L1)-French (L2) bilinguals, the authors showed that there is a semantic number magnitude effect in both forward and backward translation of number words: It takes longer to translate number words representing large quantities (e.g., acht, huit [eight]) than small quantities (e.g., twee, deux [two]). In a 3rd experiment, the authors replicated these effects with number words that had been acquired only just before the translation task. Finally, it was shown that the findings were not due to the restricted semantic context of the stimuli. These findings strongly suggest that translation processes can be semantically mediated in both directions, even at low levels of L2 proficiency. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于线性结构的逆向组合拍卖算法研究

对逆向组合拍卖的拍卖模型和WDP问题进行了研究,报告了当前逆向组合拍卖的研究现状,分析了对称关联价值模型的基本性质.结合对称关联价值模型分析了WDP的形式化描述,在此基础上提出了基于线性结构的饱和分割区近似算法(LISAPA).该算法避免了项目组合树的建立,并且可以在构造过程中直接由局部最优解扩展到全局最优解,从而显著的提高构造效率.实验结果表明,当拍卖项目组合数大于拍卖项目数时,该算法能够解决中标者确定问题,并且有较好的达优率.     

An estimate of the effectiveness of pheromone-baited traps for the suppression ofScolytus multistriatus (Coleoptera: Scolytidae)

We attempted to suppress a population ofScolytus multistriatus (Marsham), the principal vector of Dutch elm disease, by trapping flying beetles on sticky traps baited with synthetic pheromone. The estimated catch on 421 traps distributed throughout a 1-km² plot in Detroit, Michigan, was nearly 1 million beetles. Because an estimated 5 million beetles emerged in the plot during the study period, we conclude that this preliminary trapping study had no appreciable effect on suppressing the population. Studies that employ improved materials and techniques are continuing.     

信息不对称对于IPO竞价发行的影响

构建了在信息不对称条件下进行IPO竞价发行的价格博奕模型，证明了在我国现有的市场条件下采用竞价发行方式是对证券市场的一种极大的考验，因为这种机制在信息不对称的情况下对于缺乏信息的一方是非常不利的，会影响投资者参与IPO发行和资源的有效配置。因此竞价发行方式的顺利运行必须依赖于市场的成熟，信息披露制度的完善。     

房地产拍卖中的价格悖论现象成因及其解释

提出了在房地产拍卖活动中发生的一个矛盾现象，土地拍卖价格通常高于其正常市价，而房地拍卖价格又往往低于其正常市价。通过引入博弈论思想对这一现象的成因进行分析，指出土地与房地经营预期的风险水平的不同是导致拍卖价格悖论的主要原因，在这一分析的基础上，文中进一步讨论了这一现象的实质及其应用意义。     

以小见大的文化映射——荷兰艺术博物馆门票设计札记

荷兰艺术博物馆,因其完善的设施及丰富的馆藏作品每年都吸引着众多参观者.本文通过实地考查对荷兰艺术博物馆门票设计加以分析,总结出不同的门票设计是如何体现各博物馆不同文化的.     

Power allocation for downlink multiuser hybrid NOMA‐OMA systems: An auction game approach

Nonorthogonal multiple access (NOMA) is viewed as one of the key enabling candidate for the fifth‐generation systems. The effectiveness of such networks heavily relies on the power allocation. This paper addresses the problem of power allocation in a downlink multiuser hybrid NOMA‐orthogonal multiple access (OMA) network, where NOMA is integrated into OMA. Users with strong channel conditions are paired up with the users having weak channel conditions based on a random mechanism. Further, user pairs compete in an auction game for the transmit power being sold by the base station. Bids are placed iteratively by each user pair such that it maximizes their own utility. The existence of a unique Nash equilibrium has been proved theoretically. Simulation results show that the proposed scheme achieves higher average sum rate of users in comparison with that of the existing algorithms.