Joint Rate-and-Power Allocation for Multi-channel Spectrum Sharing Networks with Balanced QoS Provisioning and Power Saving

In this paper we study the joint rate-and-power allocation for multi-channel spectrum sharing networks with balanced QoS provisioning and power saving. We formulate this cross-layer optimization problem as a non-cooperative game G _JRPA in which each user has a coupled two-tuple strategy, i.e., simultaneous rate and multi-channel power allocations. A multi-objective cost function is proposed to represent user’s awareness of both QoS provisioning and power saving. We analyze the properties of Nash equilibrium (N.E.) for our G _JRPA , including its existence, and properties of QoS provisioning and power saving. Furthermore, we derive a layered structure by applying the Lagrangian dual decomposition to G _JRPA and design a distributed algorithm to find the N.E.. Simulation results are presented to show the validity of our game theoretic formulation and the performance of our proposed algorithm. Detailed studies on the performance tradeoff between QoS provisioning and power saving are also carried out.

转基因食品安全监管的演化博弈分析

近年来,食品安全问题不断出现,公众对其的关注日趋广泛。食品安全问题,尤其是关于转基因食品安全性的议题在各国范围内争议日益剧烈。本文运用经济学演化博弈的方法,分析了转基因食品安全监管中食品生产商与政府监管部门行为的动态演化过程,并且用数值仿真展示了演化结果。研究结果表明,政府监管部门的监管力度、处罚力度以及对监管部门成功监管的奖励力度的大小等对于转基因食品市场的健康发展有着至关重要的影响。     

Development of microsatellite markers and a preliminary assessment of population structuring in the rice weevil,Sitophilus oryzae (L.)

The rice weevil, Sitophilus oryzae is one of the primary pests of stored grains worldwide. To develop and implement an effective integrated pest management strategy, an understanding of the population structuring of this destructive pest is vital. In this study we used Illumina paired-end sequencing to develop S. oryzae species-specific microsatellite markers, and used these markers to conduct a preliminary assessment of population structuring in four populations of S. oryzae from three countries (Australia, China, and USA). 7,635,996 raw sequencing reads were produced, with 11,794 microsatellites detected and 214,257 primer options designed. 48 microsatellite markers were selected for further validation, with 10 markers amplifying consistently across the four S. oryzae populations. These markers displayed a high level of polymorphism overall (6.67 alleles/locus), though this was slightly lower within populations (3.10–4.88 alleles/locus). We used the markers to conduct a preliminary assessment of genetic structuring among the four S. oryzae populations: three laboratory cultures (New South Wales, Queensland, and Santai) and a field collected population from Kansas. Analyses suggest high levels of genetic differentiation between the sample locations, with a global F_ST of 0.239, and pairwise F_ST values ranging from 0.100 to 0.395. Bayesian clustering analyses suggest these four populations formed four distinct clusters, with a similar pattern identified by Principal Coordinate Analysis. These microsatellite markers, together with our preliminary population genetic analyses, will provide a valuable resource for population genetic research, and contribute to effective integrated pest management strategies in the future.     

博弈视角下不同直播营销模式的服装电商决策分析北大核心CSCD

为探讨服装电商直播营销模式选择问题,本文使用博弈模型对比服装电商不开通直播、自主开通直播、邀请主播合作直播等不同模式下的预期销量和利润,并分析服装电商开通直播时利润随服装价格弹性系数、传统渠道市场份额变化情况。数值推导和仿真结果表明:1)服装电商开通直播时,利润随着价格弹性系数上升而下降,随传统渠道市场份额增加呈“U”型变化。2)实际转化率较低时,服装电商自主开通直播模式下的利润降低、邀请主播合作开通直播模式下的销量与利润都降低;实际转化率升高,开通直播模式下的销量与利润提高;实际转化率持续升高,邀请主播合作直播模式的销量与利润远高于不开通直播与自主直播模式。     

浅议博弈论视角下食品安全管理的道德问题

目前,食品安全受到全社会的关注,成为制约和困扰我国农产品加工业快速发展的瓶颈。加工企业、管理部门和消费者之间的利益博弈最终可归结为利益与道德之间的博弈,这是导致食品安全问题的最根本原因之一。建立食品安全管理的道德约束机制是提高食品安全水平和解决食品安全问题的有效途径。     

智能电网中双寡头的电价竞争策略

在竞争性市场条件下,灵活电价机制成为电能提供商调节电力市场需求的手段.如何保证电力投资的适时性和充足性成为电能提供商投资决策问题的关键.在此背景下研究了电能供应商竞争购买闲置电能并进行交易,并建立了相应的数学模型.通过分析电能质量,供电成本对投资利益的影响,并将投资收益最大化作为投资决策的基本原则,利用博弈论理论得到电能交易价格的纳什均衡解及其存在条件.最后通过算例仿真验证了所述结果的有效性.有利于节省用户的电费支出并降低供电公司的购电费,实现多方共赢.     

模拟量输入计算机的研究与实现

该文经过研究和大量的试验利用三极管的非工作区实现了特模拟量直接输入计算机的信息传输方法。该方法将传感器所采集的信息无需进行模数转换,即可直接将模拟量输入到计算机中。该研究的实现不仅降低了信息传输的成本,而且还实现了远距离传输产提高了信息传输速度。它在工控等领域具有广泛的用途。     

企业兼并中的资产定价研究

阐述了兼并企业组成国有企业集团的必然性,指出了当前企业兼并中存在的主要问题,提出了采用拟合作对策分析模型对被兼并企业资产评估值进行修正的主张。