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《数学的实践与认识》2020,(2)
互联网相关产业及移动通讯等有关技术的发展,促进了020模式及移动支付的快速普及.基于新四大发明之一的移动支付模式,对020电子商务下消费者的消费策略建立演化博弈模型并进行分析,并提出了合理选择商品以降低消费成本、充分利用共享资源和多方努力合作的建议. 相似文献
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网购方便快捷,然而电商平台的假货现象、诚信危机、规范缺失等问题则严重困扰整个电商生态系统,譬如拼多多赴美上市后饱受争议,电商平台中的“雷碧、康帅傅、粤利粤、脉劫”等产品长期存在。信用对电子商务至关重要,电商平台的信用监管责任已不容忽视。因此,本文基于博弈论将消费者投诉引入电商平台信用监管机制,构建了信息不对称下以电商平台、商家和消费者为主体的三方演化博弈模型;分析了在电商平台积极监管和消费者投诉双重监管条件下,各主体博弈策略选择与行为演化的影响因素及趋于稳定状态的条件,并进行演化仿真分析和数值模拟。研究表明:商家选择“诚信”策略的种群规模与电商平台的监管概率和消费者选择“投诉”策略的种群规模息息相关;建立商家诚信奖励和失信惩罚机制、信用保证金机制、消费者投诉反馈机制、严厉打击商家私下补贴,降低消费者及公众的参与成本,能够有效推动商家诚信经营。 相似文献
3.
《中国物理C(英文版)》2014,(4):1-4
Abstract: The cross sections of e+e-→π+π-hc at center-of-mass energies from 3.90 to 4.42 GeV were measured by the BESIII and the CLEO-c experiments. Resonant structures are evident in the e+e-→π+π-hc line shape. The fit to the line shape results in a narrow structure at a mass of (4216±18) MeV/c2 and a width of (39±2) MeV, and a possible wide structure of mass (4293±9) MeV/c2 and width (222=k67) MeV. Here, the errors are combined statistical and systematic errors. This may indicate that the Y(4260) state observed in e+e-→π+π-J/ψ has a fine structure in it. 相似文献
4.
在消费者对商品价格与供货时间的偏好假设下,建立一个厂商关于电子商务与传统商务交易方式选择的完全信息静态博弈模型,其纳什均衡表明了电子商务与传统商务潜在的发展趋势,特别是两者可能的市场剖分关系.确切而言,若市场满足既定假设,均衡条件下的电子商务交易方式表现为较长的供货时间及低于传统商务约40%的市场交易价格,将获得三分之一的市场份额. 相似文献
5.
林建宗 《数学的实践与认识》2016,(19):62-73
在线声誉机制是网购平台重要的信号机制,是平台可持续成长的基础.从理论基础、研究假设、数据来源、变量选择、模型应用等方面,全面梳理了在线声誉机制作用的实证研究方法,包括Hedonic回归、Logit、Probit、Poisson、Tobit、截取正态回归、样本选择回归、固定效应、广义最小二乘法等模型的应用.最后展望未来相关研究及方法,并构建在线声誉机制作用的实证研究综合框架. 相似文献
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Let S° be an inverse semigroup with semilattice biordered set E° of idempotents and E a weakly inverse biordered set with a subsemilattice Ep = { e ∈ E | arbieary f ∈ E, S(f , e) loheain in w(e)} isomorphic to E° by θ:Ep→E°. In this paper, it is proved that if arbieary f, g ∈E, f ←→ g→→ f°θD^s° g°θand there exists a mapping φ from Ep into the symmetric weakly inverse semigroup P J(E∪ S°) satisfying six appropriate conditions, then a weakly inverse semigroup ∑ can be constructed in P J(S°), called the weakly inverse hull of a weakly inverse system (S°, E, θ, φ) with I(∑) ≌ S°, E(∑) ∽- E. Conversely, every weakly inverse semigroup can be constructed in this way. Furthermore, a sufficient and necessary condition for two weakly inverse hulls to be isomorphic is also given. 相似文献
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穿着一身休闲装的杨嘉宏,看上去轻松随意,不知是因为临近春节,受到了节庆气氛的熏染.还是因为当当网终于平稳度过了惊涛骇浪的2011年。对于中国的电子商务市场来说,用惊涛骇浪来形容这一年,一点都不过分。 相似文献
9.
The effects of ^60Co γ-ray irradiation on the DC characteristics of enhancement-mode A1GaN/GaN high-electron-mobility transistors 下载免费PDF全文
The effects of ^60Co γ-ray irradiation on the DC characteristics of AlGaN/GaN enhancement-mode high-electron- mobility transistors (E-mode HEMTs) are investigated. The results show that having been irradiated by^60Co γ-rays at a dose of 3 Mrad (Si), the E-mode HEMT reduces its saturation drain current and maximal transconductance by 6% and 5%, respectively, and significantly increases both forward and reverse gate currents, while its threshold voltage is affected only slightly. The obvious performance degradation of E-mode A1GaN/GaN HEMTs is consistent with the creation of electronegative surface state charges in the source-gate spacer and gate-drain spacer after being irradiated. 相似文献
10.
钱丽丽 《数学的实践与认识》2010,40(10)
当前信誉已成为电子商务发展中不可回避的问题.C2C模式下,信誉是交易进行的基础,它直接关系着交易的安全有效.从卖家收益的视角出发,运用博弈理论分析了C2C模式下卖家信誉的演化过程,提出了惩罚和信任两种策略的适用条件.结果表明对于新进入的卖家,发表承诺和买方的惩罚能够促使其建立信誉,而对于已具有一定信誉值的卖家而言,买家的充分的信任和积极评价将是其维持和提升信誉的动力来源. 相似文献