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基于谱分析的国内外能源价格周期关系研究
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作者 葛新丽 熊威 +2 位作者 朱梦舟 张一星 何永秀 《水电能源科学》 北大核心 2013年第1期226-230,共5页
为了更好地应对经济全球化背景下的能源价格问题,基于谱分析方法对国内外典型市场的石油、煤炭、电力、天然气四种主要能源价格的周期互动关系进行了初步研究与探讨,考虑到我国天然气与电力市场的发展现状,借鉴发展相对成熟的美国市场... 为了更好地应对经济全球化背景下的能源价格问题,基于谱分析方法对国内外典型市场的石油、煤炭、电力、天然气四种主要能源价格的周期互动关系进行了初步研究与探讨,考虑到我国天然气与电力市场的发展现状,借鉴发展相对成熟的美国市场进行分析。结果表明,煤炭、电力、天然气三种能源市场价格均滞后于国际原油价格波动,其中煤炭价格波动略滞后于石油,而根据美国市场经验,天然气和电力价格波动周期均滞后于煤炭和石油市场价格。 展开更多
关键词 能源价格 GRANGER因果 谱分析 周期互动
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论国家情报与国家安全及国家发展的互动关系 被引量:16
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作者 赵冰峰 《情报杂志》 CSSCI 北大核心 2015年第1期1-7,共7页
分析了中国国家情报的斗争性、战略性与人民性,以及中国国家情报的战略与战术,阐述了中国国家安全的总体性与人民性。从国家冲突的周期波动规律推导出国家情报、国家安全与国家发展的周期性战略互动模型,利用该模型分析了当前国际形势... 分析了中国国家情报的斗争性、战略性与人民性,以及中国国家情报的战略与战术,阐述了中国国家安全的总体性与人民性。从国家冲突的周期波动规律推导出国家情报、国家安全与国家发展的周期性战略互动模型,利用该模型分析了当前国际形势下三者在中国国家治理体系中的互动关系,并主张中国采用国家主义治理手段。 展开更多
关键词 国家情报 国家安全 国家发展 国防经济 认知对抗 周期性战略互动模型 战略与战术
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Facilitating IT outsourcing through improving buyer-vendor interaction in outsourcing life cycle
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作者 谢刚 梅姝娥 《Journal of Southeast University(English Edition)》 EI CAS 2011年第1期96-100,共5页
For a clear understanding of how to foster necessary attributes of partnerships that promote a closer relationship for achieving outsourcing success,this paper tries to explore the role of interaction.Based on empiric... For a clear understanding of how to foster necessary attributes of partnerships that promote a closer relationship for achieving outsourcing success,this paper tries to explore the role of interaction.Based on empirical data from a logistics and procurement flat system outsourcing case and earlier research,the industrial network approach and the international marketing and purchasing interaction model are used to analyze the nature of interaction in a three-phased outsourcing life cycle,particularly,characteristics and activities of the transition phase are identified.The findings reveal that developing a relationship between partners requires an industrial network perspective.Improving the key aspects of interaction,information and knowledge sharing,communication and collaborative participation,involved in the important events of three phases would contribute to enhance the relationships performance.The key aspects of interaction should take place among the network actors and not just between buyers and vendors. 展开更多
关键词 information technology(IT) outsourcing outsourcing life cycle INTERACTION
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Theory of Dynamics In-Phase Locking and Quasi-Period Synchronization in Two Mutually Coupled Multi-Quantum-Well Lasers 被引量:1
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作者 YAN Sen-Lin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第3期481-488,共8页
Abstract We study dynamics in two mutually coupling multi-quantum-well lasers. We carry out theoretical and numerical analysis of synchronization, anti-synchronization, in-phase locking in the two identical lasers but... Abstract We study dynamics in two mutually coupling multi-quantum-well lasers. We carry out theoretical and numerical analysis of synchronization, anti-synchronization, in-phase locking in the two identical lasers but detuning, in detain. It is proved that the coupling level determines stability of the lasers by analyzing the eigenvalue equation. Critical case of locking is discussed via the phase difference equation. Quasi-period and stable states in the two lasers are investigated via varying the current, detuning and coupling level. 展开更多
关键词 in-phase locking SYNCHRONIZATION multi-quantum-well laser COUPLING
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建筑与房地产市场的波动与宏观经济因素的关系研究
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作者 陆家尚 《经济与社会发展研究》 2024年第23期0055-0057,共3页
本研究深入探讨了建筑与房地产市场波动的内在机制及其与宏观经济因素的关联性。通过收集 并分析历年来的经济数据,我们发现 GDP 和利率等宏观经济指标与建筑与房地产市场的波动存在显著的相 关性。具体而言,GDP 的增长通常带动房地产... 本研究深入探讨了建筑与房地产市场波动的内在机制及其与宏观经济因素的关联性。通过收集 并分析历年来的经济数据,我们发现 GDP 和利率等宏观经济指标与建筑与房地产市场的波动存在显著的相 关性。具体而言,GDP 的增长通常带动房地产市场的繁荣,而利率变化则对房地产市场的波动具有直接调 控作用。进一步的研究揭示了建筑与房地产市场波动与经济周期之间的双向互动关系。 展开更多
关键词 建筑与房地产市场波动 宏观经济因素 GDP和利率相关性 经济周期互动关系
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A plant-pollinator system: How learning versus cost-benefit can induce periodic oscillations
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作者 Virgilio Vazquez Ignacio Barradas 《International Journal of Biomathematics》 SCIE 2018年第2期189-215,共27页
In this paper, we propose a model describing the interaction between two species: a plant population that gets pollinated by an insect population. We assume the plant population is divided into two groups: the first... In this paper, we propose a model describing the interaction between two species: a plant population that gets pollinated by an insect population. We assume the plant population is divided into two groups: the first group in mutualistic relationship with the insect and the second group attracting the insects while deceiving them and not delivering any reward. In addition, we assume that the insect population reduces the number of visits to the plants after several unsuccessful visits. We are interested in the conditions for the coexistence of both species, especially in the appearance of damped or sustained oscillations. We focus the analysis on the parameters that measure the balance among deceit, the benefit that the insect gets from the plant, and the learning by the pollinators. We are especially interested in analyzing the effect of learning by the insect population due to unsuccessfully visiting the deceiving plants. 展开更多
关键词 Deceptive pollination MUTUALISM LEARNING oscillations Hopf bifurcation.
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