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1.
由于机载防撞系统(TCAS)是针对具有较大垂直高度变化率的大型飞机设计的,系统设定条件和与之相关的解脱建议并不能适用于通航飞机。针对通用航空的防撞问题,提出了一种基于马尔可夫决策过程(MDP)的防撞逻辑设计方法。首先,将飞机空中相遇过程的动态模型转换为离散转移函数;然后,基于防撞系统结果事件末端效用函数进行MDP建模,采用动态规划方法导出了最优防撞逻辑的迭代方程;最后,给出了通航飞机最优化防撞逻辑的设计流程并对最优防撞逻辑进行了计算机仿真。仿真结果表明,通过调整效用比参数可以在保证安全性能的同时有效降低系统告警率。在垂直相遇高度小于30 m的相遇过程占比高达18〖WT《Times New Roman》〗%〖WTBZ〗的情况下,当告警率大于0.85时系统的碰撞概率仅为2.88×10-4左右。该设计方法对我国在低空空域通用飞机防撞系统的研究具有一定的参考价值。 相似文献
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Carlos León Clara Machado Andrés Murcia 《International Journal of Intelligent Systems in Accounting, Finance & Management》2016,23(1-2):121-153
Three metrics are designed to assess Colombian financial institutions' size, connectedness and non-substitutability as the main drivers of systemic importance: (i) centrality as net borrower in the money market network; (ii) centrality as payments originator in the large-value payment system network; and (iii) asset value of core financial services. An aggregated systemic importance index is calculated based on expert knowledge by using a fuzzy logic inference system. We use principal component analysis to calculate a benchmark index for comparison purposes. Overall similarities between both indexes put forward that expert knowledge aggregation is consistent with that based on a purely quantitative standard approach. Specific non-negligible differences concur with the nonlinear features of an approach whose intention is to replicate human reasoning. Both indexes are complementary and provide a comprehensive relative assessment of each financial institution's systemic importance in the Colombian case, in which the choice of metrics pursues the macroprudential perspective of financial stability. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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Transformational change and the vacuum of performance measurement: How a story of success became a failure
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Ulf Ramberg 《Financial Accountability and Management》2017,33(3):249-263
Some local government organisations stand out in terms of their capability to adopt and use management accounting innovations and become a model for those struggling with issues such as performance measurement (PM). But what happens to the innovations if the organisation is forced into transformational change? This longitudinal case study is based on the theory that the use and impact of PM is influenced by (a) its contractibility and (b) how the performance management systems in place are configured and used. One conclusion is that transformational change can result in a vacuum of PM, even with a high degree of contractibility. 相似文献
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As companies gradually shift from the exchange view to the resource integration view, the creation of value also shifts from the customer sphere to the joint sphere. As a result, the customer and service provider are responsible for co-creating value through resource integration. However, it raises the question of whether customers are capable of contributing to the co-creation of value. Our study proposes a framework of how goal congruence plays a pivotal role in the resource integration process between all actors in the joint sphere. When the level of goal congruence between customer and service provider actors is high, it stimulates the exchange of valuable resources from all actors, which leads to the actual experience of co-creation resulting in value-in-use and improves service outcomes, i.e., customer satisfaction and loyalty. Data were collected through a field survey from salon-and-spa customers (n = 530) and PLS-SEM was employed to test the hypotheses and further analysis. The results show that goal congruence impacts customer satisfaction and loyalty through value-in-use. Therefore, suggesting service providers to properly socialize their goals will be a good strategy to increase customer capability to co-create value and ultimately enhance customer satisfaction and loyalty. 相似文献
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从土地资源优势区配置到主体功能区管理:一个国土空间治理的逻辑框架 总被引:2,自引:0,他引:2
研究目的:以土地资源配置方式遵从优势区开发原则到服从主体功能区分工协作规则演进规律,解释现行中国治理模式下国土空间管理逻辑。研究方法:文献分析法和理论分析法。研究结果:传统优势区开发理念为早期区域发展带来了集聚与规模经济效益,但其内部仍存在生产、生活、生态空间结构失衡等问题,降低了土地资源空间配置效率。主体功能区战略是传统优势区土地资源空间配置理念转型,是中国特定时期具有国家特色的经济发展模式,关键在于明确地方土地资源空间配置核心定位,应以法律规范\"央地\"土地关系、差别化实施政策制度安排、引导公众参与规划决策、创新生态(经济)补偿机制。研究结论:不同分区土地资源空间配置关系协调是世界性问题,转型时期中国国土空间优化和规制治理重点在于厘清中央与地方事权关系,精准落地县域主体功能区建设,健全主体功能配套政策体系。 相似文献
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This paper presents a new algorithm of fuzzy clustering, based on analogy withmechanics physics. The vectors xi are compared with `material points' and the clusters can be looked on as material points clouds, that are characterized byspecific units. The choice is based on a study of potential energy. Once a specificunit is chosen, we calculated the membership of the other units whit respect it.A study of a sociology test is performed and the results are very encouraging,though an further deepening is needed like a thermodynamics analogy application. 相似文献
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王鹏 《沈阳工程学院学报(社会科学版)》2012,8(1):116-120
当前法学本科人才培养同质化严重,脱离岗位实际,学生实践能力和创新能力较差。项目式教学有别于传统教学模式,其环节包括通过岗位调研制定项目列表;将项目内容转化为教学内容;确定项目课程;制定专业课程体系等四个方面。项目式教学以工作岗位技能为基础,注重理论和实践的有机结合,激发学生的学习兴趣和创新能力,培养学生独立与合作完成工作的能力,便于有效评价教学目标是否达到,突破了传统教学模式的局限,为法学本科人才培养提供了一条新的途径。 相似文献
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新古典经济学需求理论的主要目的是解释消费者对商品组合如何实现最优选择的问题,包括单个消费者是如何在不同商品选择中实现最大化满足的,消费者的个体需求是如何形成市场集体需求的等.本文在研读相关原著的基础上认为,新古典经济学需求理论在解决这些理论难题时,必须具体分析该理论的历史功绩和内在逻辑缺陷. 相似文献