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具有利益冲突的发展中国家与发达国家之间的博弈分析 总被引:2,自引:0,他引:2
运用微分对策理论研究具有利益冲突的发展中国家与发达国家的均衡策略 .首先建立两国的动态博弈模型 ,然后利用微分对策理论分析模型的均衡解 .研究结果显示 :1 .发达国家在一定时期里的蓄意破坏是其最优策略 ;2 .发展中国家与发达国家在不同时期里各自的最优策略是不同的 ,“以牙还牙”的策略并非最优策略 ;3.发展中国家为了避免在此对策略过程中蒙受更大的损失 ,利用军事或经济的策略基本上是无效的 .发展中国家应当寻求经济、军事以外的途径 ,比如政治和谈等手段 .该文的研究方法可适用于更大范围的对策问题的研究 . 相似文献
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中外股票市场风险收益的比较研究 总被引:4,自引:0,他引:4
将中国证券市场的A股、B股分别与国际上四个成熟市场的风险、收益行为进行比较,从不同的角度分析和考察我国证券市场的数量特征,以及它与国际证券市场的关系是否密切;用带有局部及全球信息变量的GARCH(1,1)实证模型检验股指收益的条件均值,发现股指波动是时变的、不均匀的.局部及全球信息变量对股指收益有一定的解释性。 相似文献
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城乡人际关系差异成因的系统考察 总被引:4,自引:0,他引:4
农村和城市是两种不同模式的社区,由于二的生产力水平和社会明程度不同,因而居民的人际关系也有很大差异。农村人际关系简单、亲密、情感色彩浓重,城市人际关系则复杂、疏远、理性成份较多。这种差异的形成原因是多方面的,为此,从社区的居民构成、产业状况、生活条件、化素质、思想观念和交际目的等方面作了系统的考察,意在揭示差异产生的深层机制,进而说明差异的产生是社会明进步的必然,差异的存在是城乡社会经济化发展不平衡的客观反映,差异的消灭又有待在经济社会发展的基础上实现城乡融合。这对于我们客观全面地认识当前我国城乡人际关系的现状,合理评价它们的社会作用,并在未来城乡社区的规划和建设中作为系统整体加以整合,扬长避短,以促进二共同进步和协调发展,都有一定的参考和借鉴意义。 相似文献
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《系统科学与信息学报》2018,(6)
This paper explores the macroeconomic determinants of non-performing loans(NPL) in 19 Asian countries(low to high income economies) using the Generalized Method of Moments estimation approach based on the economic data for the period between 1998 and 2015. The categorization of the economies is based on the average gross national income per capita as set by the World Bank.Specifically, the paper aims to evaluate if the determinants of NPL vary with the income levels of the countries. The results indicate that the NPL is strongly influenced by the inflation rate. The effect is,however, negative in the high-income and the middle-income countries and positive in the low-income countries. The GDP per capita has a dynamic negative relationship with the NPL in the high-income and the low-income countries. The remittance has a significant positive association in the high-income and a significant negative association in the low-income countries. Similarly, the unemployment rate has a positive effect on NPL in the middle-income and the low-income countries. With the rise in the official exchange rate, the NPL level increases in the low-income countries. The overall estimation results suggest that the NPL in Asian banking system depend on some key macroeconomic variables,such as unemployment rate, inflation rate, official exchange rate, remittance received and gross domestic product per capita, and these associations vary with the income level of the countries. Therefore,economic level of a country should be carefully considered while formulating credit policy to minimize credit risks in the banking system. 相似文献
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基于可持续发展综合国力的生态系统服务评价研究——13个国家生态系统服务价值的测算 总被引:39,自引:0,他引:39
分析了生态系统服务的内涵 ,探讨了生态系统服务评价的意义 ,对比分析了生态系统服务评价的方法 ,最后测算了澳大利亚、巴西、英国、加拿大、中国、法国、德国、印度、意大利、日本、俄罗斯、南非、美国等 1 3个国家的生态系统服务价值. 相似文献
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贫困是目前中国发展中普遍存在的一种现象,而农业历来是贫困县综合发展中的薄弱环节.建设现代农业,发展农村经济,增加农民收入,也是贫困区新农村建设的中心任务.以云南73个国定贫困县为对象研究,分析当前贫困县农业发展的特征及存在的主要问题,通过建立数学模型量化影响各贫困县农业系统可持续发展的因子,并根据评价结果对贫困县分类,针对其农业系统的障碍因素提出相应对策.图1,表3,参10. 相似文献
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基于59篇实证文献、75个效应值、44 316个独立样本,应用Meta分析方法从数字技术、数字战略、数字能力和数字文化4个维度剖析数字化转型与企业绩效间的作用关系和情境条件。结果显示:数字技术、数字战略、数字能力和数字文化与企业绩效均有较强的正相关关系,其中数字文化的作用效果最为显著;企业规模、行业类别和测量方式在数字技术、数字能力和数字战略与企业绩效关系间均起到调节作用,但存在差异,而文化背景只调节数字技术和数字战略与企业绩效的关系。文章丰富了数字化转型与企业绩效的相关理论成果,并为数字化转型背景下提升企业绩效提供管理依据。 相似文献
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城市轨道交通枢纽适应性仿真系统实现策略 总被引:1,自引:0,他引:1
首先在5个仿真子系统的划分基础上,建立设施布局图、设施数据设置、仿真数据设置、仿真过程演示、仿真结果分析5个功能模块。其次提出了离散和连续仿真相结合、微观和宏观仿真相结合、基于启发式算法的仿真优化策略、虚拟环境动画演示和多线程控制策略等仿真实现方法。接着提出了基于UML的类模型、状态模型、交互模型的面向对象建模方法。然后从设施布局、设施规模、客流规模、进出站列车四个角度分析了设施适应性的对比评价研究策略。最后应用提出的基于遗传算法的仿真优化策略,实现了售检票区域子系统内进出站闸机的仿真优化配置算法的验证与分析,为仿真系统的应用开发奠定了理论和技术基础。 相似文献
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SHI Minyong 《系统科学与复杂性》1999,(3)
1.IntroductionInthispaperweconsideronlyfiniteundirectedlooplessgraphs.ForasubgraphHofG,E(H)andP(H)denotethenumberofedgesandthenUmberofcyclesinHrespectively.GiventwodisjointsubsetsXandYofV(G),wewriteEG(X,Y)={acEE(G)IxEX,y6Y}.IfTisatreeinGande=acEG--E(T)with{u,v}CV(T),thenT econtainsauniquecycle.WedenotethiscyclebyC(T,e).Aforestiscalledak-tree-forestifitconsistsofexactlykpairwisedisjointtrees.ForagraphG,ifE(G)canbepartitionedilltoseveralpairwisedisjointsetsas{EI,EZ,...,EI}such… 相似文献
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中国绿色增长模式的动态仿真分析 总被引:1,自引:0,他引:1
本文运用系统动力学理论构建中国绿色增长系统的动力学模型,通过对经济、资源、环境、生活、政策子系统参数的调控,预测人均绿色GDP、资源环境成本、生态安全指数、环境污染指数、国民幸福指数以及研发效率等变量的动态趋势,模拟得到四种不同的经济增长模式.研究结果表明:经济的快速发展给生态环境产生了巨大压力,环境污染与资源枯竭问题的日益严重将会阻碍经济的可持续发展;通过政策干预与国家宏观调控,优化产业结构,限制高耗能、高污染产业的发展,对资源的生产与使用起到约束作用;方案4:协同发展模式以快速的经济增长速度和较低的经济损失、资源消耗与环境污染代表了快速增长低消耗低污染的发展模式,即绿色的增长模式. 相似文献
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Ordered weighted distance measure 总被引:2,自引:0,他引:2
The aim of this paper is to develop an ordered weighted distance (OWD) measure, which is the generalization of some widely used distance measures, including the normalized Hamming distance, the normalized Euclidean distance, the normalized geometric distance, the max distance, the median distance and the rain distance, etc. Moreover, the ordered weighted averaging operator, the generalized ordered weighted aggregation operator, the ordered weighted geometric operator, the averaging operator, the geometric mean operator, the ordered weighted square root operator, the square root operator, the max operator, the median operator and the rain operator are also the special cases of the OWD measure. Some methods depending on the input arguments are given to determine the weights associated with the OWD measure. The prominent characteristic of the OWD measure is that it can relieve (or intensify) the influence of unduly large or unduly small deviations on the aggregation results by assigning them low (or high) weights. This desirable characteristic makes the OWD measure very suitable to be used in many actual fields, including group decision making, medical diagnosis, data mining, and pattern recognition, etc. Finally, based on the OWD measure, we develop a group decision making approach, and illustrate it with a numerical example. 相似文献
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通过对西部地区农业专业化生产中存在问题的分析,引入单产比较优势、区位比较优势、综合比较优势,对西部各省区水稻、小麦、玉米、豆类、薯类、油菜、棉花、糖料、烟草、蔬菜和瓜果11类主要农作物在全国的比较优势进行了衡量,并对在全国具有综合比较优势的农产品进行了排名,为地区作物布局提供了参考依据。表5,参5。 相似文献
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设计了一个包含一位发送者和两位接收者的三节点信任博弈实验,并使得两位接收者与发送者之间具有不同的社会距离,以便研究当两位接收者与发送者社会距离不同时,接收者的返还行动信息不对称对发送者信任水平和接收者可信度的影响。实验结果表明,当两位接收者中有一位是发送者的朋友时,接收者返还行动信息不对称对发送者的信任水平和朋友接收者的可信度均无显著影响,而身为陌生人的接收者在其返还行为无法被发送者直接观测时明显降低了其返还给发送者的点数比例。简言之,朋友是可靠的,不论身份和行动信息是否公开,朋友总是值得信赖的,虽然这种情谊在返还行动信息不对称时给陌生人提供了搭便车的机会,但这并不影响发送者和朋友接收者的收益增加。 相似文献
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从定性到定量的系统性信息安全综合集成评估体系 总被引:1,自引:0,他引:1
利用综合集成的理论方法 ,对信息安全量化评估体系在理念、理论、方法论、思路、技术、实现、应用和组织管理等方面进行综合研究 相似文献
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《系统科学与信息学报》2017,(3)
With the incorporation of spatial statistic method, this paper constructs a state-space model of housing market bubbles, discussing the spatial pattern of housing market bubbles in China,and identifying the dynamic evolution process. The results show that: The bubbles of housing market walked along a path from low level to high level and then downsized to a low level during the period of 2009 and 2014, and the highest level stayed at 2011. From overall, the level of housing market bubbles had shown significant spatial autocorrelation and spatial agglomeration. In detail, the direction of North-South in China showed the inverted U shape, i.e., Central region was with high bubbles, and two ends contained low bubbles; from East-West direction, the East had high bubbles and the West contained comparatively low bubbles. Local spatial test indicates that there were some approximate spatial features in housing market bubbles among the adjacent regions. Observed from the level of housing market bubbles, China contained 3 plates: The first was the plate with low bubble level,including 3 provinces in North-East China(provinces of Jilin, Heilongjiang and Liaoning were included,but Dalian in Liaoning province was excluded; the second was the Central and West plate(the provinces of Yunnan, Guizhou, Sichuan, Guangdong, Guangxi, Hunan, Hubei, Gansu, Fujian, Jiangxi and Hainan were included in this plate), which was also featured with low bubble; and the third was Central East plate(provinces or provincial regions of Beijing, Tianjin, Hebei, Jiangsu, Zhejiang, Shanghai, Shandong,Anhui, Shanxi, Shaanxi and Inner Mongolia were included), which was characterized as high bubble region. 相似文献