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通过分析市场经济条件下信息不对称的影响以及"劣币驱逐良币"现象产生的原因,分别建立企业问以及企业与政府间的质量信用博弈模型,在此分析基础上得出重复博弈对企业质量信用机制建设的重要作用.通过企业质量信用分类监管实施试点工作的实证研究,进一步得出政府作为市场监管者,实施分类监管措施是建立有效企业质量信用机制的不二途径. 相似文献
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《工业工程与管理》2021,(3)
信息不对称条件下,将互惠偏好理论引入到双重委托代理模型,分别比较生产者和监管者在无互惠偏好和有互惠偏好下的学习水平、产出努力水平和合作努力水平,并通过数值模拟验证结论的有效性。研究表明:生产者和监管者的学习水平与激励系数成正比,与学习成本负相关,与互惠偏好、固定报酬无关;初始学习能力髙的生产者和监管者可提高消费者期望收入;生产者和监管者的努力程度与激励系数、努力水平影响系数正相关,与产出成本负相关,与固定报酬无关,但固定报酬可以促进委托代理关系构建;激励系数与风险规避系数、环境波动程度成反相关;互惠偏好系数大于临界值时努力水平与互惠偏好系数负相关,但努力程度仍大于无互惠偏好行为下的努力水平,于临界点达到峰值。 相似文献
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瞿宏 《中国新技术新产品》2009,(24):126-126
电力企业作为关系国家能源安全的公共事业企业,履行"服务党和国家工作大局、服务电力客户、服务发电企业、服务经济社会发展"的社会责任。加强优质服务,提升供电企业的无形资产价值,能够赢得社会和各级政府的信赖与支持,是营造良好发展环境、实现企业与社会和谐发展的客观需要。 相似文献
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我国建筑领域招投标市场中的合谋行为破坏了正常的招投标秩序,如何有效地治理招投标市场中的合谋行为,促进招投标市场的健康发展是本文研究的目的。基于目前常用的36项防范措施的有效性和可行性在工程界展开问卷调查,针对112份有效问卷的调查数据进行统计分析,得出工程领域被调查专家对合谋防范措施有效性和可行性的看法。结果显示:36项防范措施普遍存在有效性高于可行性,可行性差是制约防范措施发挥作用的重要因素。在此基础上,针对有效性高的措施,整合构建出我国建筑市场招投标合谋防范体系,为防范招投标合谋行为提供有益的政策建议。 相似文献
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财政部门作为政府在会计监管中的重要力量,在实施会计监管过程中面临了许多新问题。通过对问题的分析从推进会计监督法制环境建设、构建政府监管为主导,以行业自律管理为补充的会计行业监管模式、建立对监管者的监督约束机制等方面提出相应的对策和建议。 相似文献
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研究了单一制造商和两个竞争的零售商组成的闭环供应链系统中制造商防范零售商合谋的机制设计问题。研究表明,零售商合谋损害了闭环供应链系统和制造商的利润,增加了自身的利润;并提高了销售价格,从而损害了消费者的利益;零售商合谋给制造商带来的损失随着竞争程度的增加而增加;防范机制可减少制造商因零售商合谋而导致的利润损失,但并不能达到零售商不合谋时的利润水平。 相似文献
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Users share a group key to decrypt encryptions for the group using a group key management scheme. In this paper, we propose a re-encryption-based group key management scheme, which uses a unidirectional proxy re-encryption scheme with special properties to enable group members share the updated group key with minimum storage and computation overhead. In particular, we propose a proxy re-encryption scheme that supports direct re-encryption key derivation using intermediate re-encryption keys. Unlike multi-hop re-encryption, the proposed proxy re-encryption scheme does not involve repeated re-encryption of the message. All the computations are done on the re-encryption key level and only one re-encryption is sufficient for making the group key available to the users. The proposed scheme is the first for group key management based on proxy re-encryption that is secure against collusion. The individual users store just one individual secret key with group key derivation requiring O\((\log N)\) computation steps for a group of N users. Size of the public bulletin maintained to facilitate access to the most recent group key for off-line members is O(N) and remains constant with respect to the number of group updates. The proposed group key management scheme confronts attacks by a non-member and even a collusion attack under standard cryptographic assumptions. 相似文献
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对分布式哈希表(DHT)系统的安全脆弱性问题进行了研究,提出了多种安全性优化策略,并给出了一个原型系统。进行了真实网络实验,实验数据表明,现有DHT网络易受索引毒害和路由污染攻击,产生的错误查询结果甚至会引发更大规模的网络安全事件。通过改进一个个DHT系统的节点ID生成机制、路由表更新机制和搜索路径选择机制,从系统运行的各个阶段提升其安全场,抵御攻击者共谋。基于上述方法设计的原型系统在保证平均查询跳数增加不到1跳的情况下,在共谋攻击节点占比60%的网络中,将系统查询成功率保持在65%以上,其方法适用于各种分布式哈希表结构,具有重要的实际应用前景。 相似文献
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针对政府激励、科技资源平台创新、小微企业参与平台创新的博弈问题,构建小微企业、平台与政府三方演化博弈模型,考虑政府激励的动态性,分析影响各参与主体行为策略演化路径的因素。研究发现,增加政府监管制度供给、实施平台动态考核、适度控制奖励支付总额及设计合理的奖励衰减机制;督促平台提供创新性服务、打造良好平台生态;实施有利于降低小微企业参与平台创新的成本,以及增加其不参与时的潜在损失的措施等等,能增加三方收益,是促进科技资源平台与小微企业创新行为的有效方法。 相似文献
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Purpose
Health risk behaviors tend to cluster in young people, not least among young drivers. Less is known about the health risk profile of young unlicensed drivers. This study investigates health risk behaviors among young unlicensed drivers compared to both their licensed and driving peers, and their non-driving peers.Methods
High school students participating in the Youth Risk Behavior Surveillance System in Montana (US) and age-eligible to have a driver's license were studied (n = 5985), categorized according to their self-reported car driving and license practice (licensed driving, unlicensed driving, and non-driving). Ten health risk behaviors, of which four were related to car riding/driving, were considered. Multinomial logistic regression was used to compile sex-specific odds ratios (with 95% confidence intervals) of adopting those behaviors using licensed drivers as a reference and adjusting for age and race/ethnicity.Results
Health risk behaviors tended to be more common among unlicensed drivers than other groups, although some behaviors were prevalent in all groups (i.e., alcohol use and lack of seat belt use). As a consequence, for both male and female students, there was a significant association between unlicensed driving and most health risk behaviors, except for being involved in a physical fight and riding with a drinking driver among female students.Conclusions
Young unlicensed drivers are more likely than licensed drivers to adopt several health risk behaviors both in car driving/riding or otherwise, in particular alcohol use and cigarette smoking. This challenges any simplistic approach as unlicensed driving in youth is not an isolated act suggesting public health and traffic safety initiatives. 相似文献17.
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"互联网+政务服务"是我国政府治理的一种重要方式,也是新技术在我国电子政务中应用最广泛、最有成效的领域。随着"放管服"改革的不断推进,"互联网+政务服务"建设取得了显著成效,标准在其中发挥了重要作用。本文介绍了我国"互联网+政务服务"发展现状,梳理了"互联网+政务服务"标准制定情况,分析了"互联网+政务服务"标准化建设存在的问题,提出"互联网+政务服务"标准化建设的策略建议。 相似文献
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针对"离位"增韧预成型体的液态成型工艺性,研究了两种不同结构形式增韧层"离位"增韧预成型体的厚度压缩特性。分别采用多孔薄膜结构增韧层、高孔隙率无纺布结构增韧层与碳纤维织物交替铺层制备"离位"增韧预成型体,采用力学试验机测试其厚度压缩特性。实验结果表明,预成型体压缩过程中,在相同压力水平下,增韧层的引入会降低预成型体的纤维体积分数;不同压力水平下,预成型体的压缩行为与增韧层结构形式有关。此外,采用织物预成型体厚度压缩本构模型,对"离位"增韧预成型体的压缩厚度进行了预测,通过模型预测值与实验值的比较,确定了模型中的经验指数k=2时,两者吻合较好。 相似文献
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Yasutomo Uetsuji Tetsuya Hata Hiroyuki Kuramae Kazuyoshi Tsuchiya 《Acta Mechanica》2014,225(10):2969-2986
We presented a multiscale nonlinear finite element simulation to analyze domain switching behaviors in ferroelectric materials. We utilized an incremental form of fundamental constitutive law to consider changes in the material properties caused by domain switching. A multiscale nonlinear problem was formulated by employing the asymptotic homogenization theory based on the perturbation method and implemented using finite element analysis. The developed simulation was applied to barium titanate with a Perovskite-type tetragonal crystal structure. The 90° and 180° domain switching behaviors of a single crystal were computed for verification. The nonlinear behaviors of a bulk polycrystal with virtual microstructure were analyzed as a case study. The variation of the crystal orientation distribution in the polycrystalline microstructure was analyzed to reveal its influence on macroscopic hysteresis and butterfly curves. 相似文献