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基于回溯机制的互联网AS拓扑的Betweenness算法 被引量:7
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作者 张国强 张国清 《计算机研究与发展》 EI CSCD 北大核心 2006年第10期1790-1796,共7页
Betweenness能够刻画节点或边在网络中的重要程度.在Internet中,Betweenness直接反应了特定网络拓扑结构下节点或链路可能承载的网络流量,能够对网络的动态行为进行预测.但传统的Be-tweenness计算复杂度较高,为O(n3),但这些算法是为加... Betweenness能够刻画节点或边在网络中的重要程度.在Internet中,Betweenness直接反应了特定网络拓扑结构下节点或链路可能承载的网络流量,能够对网络的动态行为进行预测.但传统的Be-tweenness计算复杂度较高,为O(n3),但这些算法是为加权网络设计的,而很多实际的网络模型并没有考虑权重.另一方面,目前的算法都没有考虑边的语义,而互联网AS(autonomoussystem)拓扑中的边具有语义.针对简单无权网络提出一种基于回溯的时间复杂度为O(nm)的Betweenness计算方法.在进一步考虑InternetAS拓扑的特殊性,即任意两个相连的AS都具有某种商业关系的基础上提出了互联网AS层拓扑的Betweenness计算方法. 展开更多
关键词 betweenNESS 自治系统 网络拓扑 路由策略
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基于流量加权Betweenness提高网络容量的方法 被引量:3
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作者 范晶 张国强 张国清 《系统仿真学报》 EI CAS CSCD 北大核心 2008年第17期4708-4711,4715,共5页
在节点的发包速率和转发包速率都和节点度相关的流量模型中,研究了在基于跳数的最短路径路由策略下网络的容量问题。将Betweenness的概念进行了扩展,提出流量加权Betweenness的概念,使之更准确地描述在每个节点的发包速率各不相同的情... 在节点的发包速率和转发包速率都和节点度相关的流量模型中,研究了在基于跳数的最短路径路由策略下网络的容量问题。将Betweenness的概念进行了扩展,提出流量加权Betweenness的概念,使之更准确地描述在每个节点的发包速率各不相同的情况下节点可能承载的流量。并据此推导出适合于该流量模型的网络容量计算公式,同时指出在基于BA算法构造的scale-free网络中,在流量加权Betweenness值处在前5%至10%和前10%至15%的节点间加边的方法能显著提高容量。最后,通过仿真实验验证了该公式的正确性和该方法的有效性。 展开更多
关键词 流量加权betweenness 网络拓扑 网络容量 无标度网络 拥塞
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认知理论指导下的英语介词习得研究——以介词between和among的认知语义分析为例
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作者 张帆 《中南林业科技大学学报(社会科学版)》 2014年第5期187-189,201,共4页
英语介词主要表达事物间的相互关系,在句子结构上来说就是一种句式。Between和among句式中各个成分的隐喻使其在英语中广泛应用。在认知理论的指导下,以意象图式为基点,通过研究介词句式的引申机制和辐射网络探讨了理论对英语介词的习... 英语介词主要表达事物间的相互关系,在句子结构上来说就是一种句式。Between和among句式中各个成分的隐喻使其在英语中广泛应用。在认知理论的指导下,以意象图式为基点,通过研究介词句式的引申机制和辐射网络探讨了理论对英语介词的习得的重要指导作用。 展开更多
关键词 between AMONG 意象图式 隐喻
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Nonlinear dynamic behavior of rubbing rotor under interaction between bending and torsional vibrations 被引量:2
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作者 刘占生 崔颖 +2 位作者 韩万金 隋玉秋 黄文虎 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2002年第2期117-120,共4页
The nonlinear dynamic behavior of a rubbing rotor system was studied with a mathematical model established with the eccentricity and interaction between bending and torsional vibrations taken into consideration. The n... The nonlinear dynamic behavior of a rubbing rotor system was studied with a mathematical model established with the eccentricity and interaction between bending and torsional vibrations taken into consideration. The nonlinear vibrational response of a rubbing rotor was analyzed using numerical integral, spectroscopic analysis and Poince mapping method, which made it possible to have better understanding of the vibrational characteristics of partial rubbing and complete circular rubbing rotors. The numerical results reveal the response of torsional vibration mainly takes a form of superchronous motion, and its frequency decreases as the rotational speed increases when partial rubbing occurs, and the response of torsional vibration is synchronous when complete circular rubbing occurs. The comparison of the dynamics of rubbing rotors with and without the interaction between bending and torsional vibrations shows the interaction between bending and torsional vibrations advances the rotational speed, at which the response of bending vibration changes from a synchronous motion into a quasi periodic motion, and the interaction between bending and torsional vibrations reduces stability of the rubbing rotor. 展开更多
关键词 INTERACTION between BENDING and torsional vibrations RUBBING ROTOR BIFURCATION
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Study on the Interaction between Rare Earth and Carbon in High Carbon Steel 被引量:2
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作者 林勤 付廷灵 +2 位作者 余宗森 叶文 林东晖 《Journal of Rare Earths》 SCIE EI CAS CSCD 1995年第3期190-195,共6页
StudyontheInteractionbetweenRareEarthandCarboninHighCarbonSteel¥LinQin(林勤),FuTingling(付廷灵),YuZongsen(余宗森),Ye... StudyontheInteractionbetweenRareEarthandCarboninHighCarbonSteel¥LinQin(林勤),FuTingling(付廷灵),YuZongsen(余宗森),YeWen(叶文)(Universit... 展开更多
关键词 RE High CARBON steel Interaction between RE and CARBON RE CARBIDE
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Study on coupling between deep and shallow structures of Xingtai area and some significant questions 被引量:1
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作者 顾梦林 刘保金 +1 位作者 赵成彬 孙振国 《Acta Seismologica Sinica(English Edition)》 CSCD 2000年第4期413-423,共11页
In the light of results from study on coupling between deep and shallow structures in Xingtai earthquake area during the "Ninth Five-Year Plan" period and other previous results from deep seismic refraction/... In the light of results from study on coupling between deep and shallow structures in Xingtai earthquake area during the "Ninth Five-Year Plan" period and other previous results from deep seismic refraction/reflection and seismic prospecting of petroleum, we infer that there exist a series of shallow faults in the upper crust above the 8 km-deep detachment surface in Xingtai macroseismic focal region, where none of the faults, including Aixinzhuang fault reaches the Quaternary stratum, except that the Xinhe fault cuts through the mid-Pleistocene formation upwards. Aixinzhuang fault and other faults extend downwards into Xinhe fault whereas the Xinhe listric fault stretches downwards at a low dip angle into the detachment surface. The abyssal fault with high dip angle under the detachment surface cutting through the middle and lower crust to Moho is the causative fault for the large Xingtai earthquake, whose dislocation can cause strong earthquakes, shallow fault activity and the motion of surface material. The shallow faults in the upper crust are not causative faults for strong earthquakes, although they may be active faults. The existence of the detachment surface brings about a special relationship between shallow and deep structures, i.e. they are relatively independent of each other and have effects on each other It not only transmits partial energy and deformation between the upper and lower crust,but also has a certain decoupling effect. Finally we conclude that active faults do not necessarily reach the latest stratum, and the age of uppermost faulted stratum cannot represent the latest active period of the fault. This put to us a significant question in regard to the age determination and study of active faults. Other noticeable questions are also inferred to in this study. 展开更多
关键词 COUPLING between DEEP and SHALLOW STRUCTURES earthquake FAULT active FAULT
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Link-up between Farmers and Supermarket based on China's Fresh Agricultural Products 被引量:2
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作者 YANG Jian-ying TANG Bu-long 《Asian Agricultural Research》 2012年第9期54-56,59,共4页
Link-up between farmers and supermarket is a new move adopted actively by the current government, conducive to consumers, farmers and circulation enterprises. At present, link-up between farmers and supermarket is lau... Link-up between farmers and supermarket is a new move adopted actively by the current government, conducive to consumers, farmers and circulation enterprises. At present, link-up between farmers and supermarket is launched in China's 15 provinces and cities, which will set off the revolution in the field of agricultural circulation. Based on the current situation of link-up between farmers and supermarket and the existing problems, we put forth the following recommendations: promoting the quality of farmers' cooperative organizations; establishing the logistics center of fresh agricultural products; using economies of scale to reduce the fresh logistics costs; improving the operation and management level of fresh agricultural products in supermarket. 展开更多
关键词 FRESH AGRICULTURAL products Link-up between FARMER
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A Study on the Factors Influencing the Income Gap between Urban and Rural Areas Based on State-space Model 被引量:2
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作者 Xiaofang ZOU Xueqin JIANG 《Asian Agricultural Research》 2014年第9期1-6,共6页
The increasingly widening income gap between urban and rural areas is affected by many factors. Using the stepwise regression analysis,we find that urbanization level,socio-economic development,education level,financi... The increasingly widening income gap between urban and rural areas is affected by many factors. Using the stepwise regression analysis,we find that urbanization level,socio-economic development,education level,financial development scale and financial development efficiency have the greatest impact on the income gap between urban and rural areas. By cointegration test,it is found that there is a long-term equilibrium relationship between these five variables and the income gap between urban and rural areas. We build the state-space model to research the dynamic impact of these factors on the income gap between urban and rural areas. The results show that by improving the level of urbanization,we can effectively narrow the income gap between urban and rural areas,while socio-economic development,the improvement of education level,expansion of financial development scale and financial development efficiency all significantly expand the income gap between urban and rural areas. 展开更多
关键词 INCOME GAP between URBAN and RURAL areas State-spa
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Subliminal faces with different valence: Unconscious mismatch detection indicates interactions between unconscious processing 被引量:2
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作者 Shen Tu Ulla Martens +4 位作者 Guang Zhao Weigang Pan Ting Wang Jiang Qiu Qinglin Zhang 《World Journal of Neuroscience》 2013年第4期298-306,共9页
Many studies revealed unconscious effects on conscious processing. However, in this study, we tried to investigate whether unconscious processes could interact with each other by using simultaneously presented face pi... Many studies revealed unconscious effects on conscious processing. However, in this study, we tried to investigate whether unconscious processes could interact with each other by using simultaneously presented face pictures with the same or a different unconscious valence (SUV versus DUV). In the first event-related potential (ERP) study, DUV elicited a smaller N2 as compared with SUV. In the second functional magnetic resonance imaging (fMRI) experiment, the left middle frontal gyrus (MFG) was activated under DUV condition in comparison to SUV condition. These results support the idea of interactions between unconscious processes (unconscious mismatch detection). The theoretical implications are discussed in the light of the global neuronal workspace theory. 展开更多
关键词 INTERACTIONS between UNCONSCIOUS Processing UNCONSCIOUS Mismatch Detection Global Neuronal WORKSPACE Theory fMRI ERP
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An Empirical Analysis on the Impact of Rural Financial Development on the Income Gap between Urban and Rural Residents in Heilongjiang Province 被引量:1
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作者 Guanghe HAN Jiayu ZHOU +1 位作者 Siqi LI Zhiming SHEN 《Asian Agricultural Research》 2020年第2期1-7,10,共8页
The high-quality development of rural finance is an important support for rural revitalization.In recent years,it continuously expands the investment in rural finance in Heilongjiang Province,and optimizes the rural f... The high-quality development of rural finance is an important support for rural revitalization.In recent years,it continuously expands the investment in rural finance in Heilongjiang Province,and optimizes the rural financial service system and mechanism.The overall income level and living conditions of rural residents have been significantly improved,but there still exists income gap between urban and rural residents.Therefore,based on analyzing and combing current situation and problems of rural financial development and urban-rural income gap in Heilongjiang Province,multiple linear regression model is used to study the impact of rural financial development on the income gap between urban and rural residents in Heilongjiang Province.The research results show that the scale of rural financial development in Heilongjiang Province will enlarge the income gap between urban and rural residents,while rural financial development efficiency and urbanization level reduce income gap between urban and rural residents in Heilongjiang Province.Based on the above conclusions,some policy suggestions to promote the equalization of urban and rural income in Heilongjiang Province are puts forward in this paper. 展开更多
关键词 RURAL FINANCE INCOME GAP between urban and RURAL areas DEVELOPMENT scale DEVELOPMENT efficiency
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Relationship between Disruptions of Carbon’s Cyclic Set Natural Transfers and the Upsurge of Weather Conditions with Strong Winds and Heavy Rains 被引量:2
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作者 César Mbane Biouele 《Atmospheric and Climate Sciences》 2015年第4期380-385,共6页
The cyclic set of natural transfers of carbon (also called: Global Carbon Cycle) is built with the following physicochemical and bacteriological processes: 1) atmosphere to green plants or soil transfers;2) animals or... The cyclic set of natural transfers of carbon (also called: Global Carbon Cycle) is built with the following physicochemical and bacteriological processes: 1) atmosphere to green plants or soil transfers;2) animals or plants to atmosphere transfers;3) burning fossil fuels to atmosphere transfers;4) animals (including humans) to soil transfers;5) atmosphere to oceans transfers, etc. This whole cycle (despite its obvious complexity), is a formal proof that disturbances recorded by carbon cycle described above, inevitably alter the chemical composition of the atmosphere and, therefore, lead to climate change whose magnitude depends on the sensitivity of the atmosphere relative to the changed settings. The weather models used to assess climate change caused by CFCs, have the annoying tendency to neglect the contribution of clouds to the global carbon balance. Yet it has been proven by C. Mbane in 2015 that clouds are composed of only two elements (dry air and saturated water vapor);and that clouds’ saturated water vapor may form precipitation (solid or liquid) if and only if they met and dissolve condensation nuclei (mainly the carbon dioxide (CO2) in the case of Troposphere). In other words, atmosphere absorbs a significant amount of CO2 in the formation of rains. The purpose of our work is to make it clear to the international opinion that cloud’s saturated water vapor is the true lung of our planet, far ahead of the green plants respiration or photosynthesis those take place only under the influence of sunlight and in the very lower layers of the troposphere (e.g., well below 25 meters from the surface of the earth). Each of us could then easily understand the link between GCCD (Global Carbon Cycle Disruptions) and the upsurge of WCWSWHR (weather conditions with strong winds and heavy rains). 展开更多
关键词 Global Carbon CYCLE DISRUPTIONS (GCCD) Upsurge of WCWSWHR LINK between GCCD and WCWSWHR
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Study on Variation of Fitting Goodness of Relation Between Earthquake Frequency and Magnitude before Moderately Strong Earthquakes (Ms≥5.0) 被引量:1
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作者 Li Zhixiong,Zhang Guomin,Fu Zhengxiang,and Zhang YongxianState Seismological Bureau,Beijing 100036,China Center for Analysis and Prediction,SSB,Beijing 100036,China 《Earthquake Research in China》 1996年第4期20-28,共9页
In this paper,characteristics of spatial and temporal variation of linear fitting goodness before some moderately strong earthquakes(Ms≥5.0)in the eastern part of China(east of longitude 180)are studied according to ... In this paper,characteristics of spatial and temporal variation of linear fitting goodness before some moderately strong earthquakes(Ms≥5.0)in the eastern part of China(east of longitude 180)are studied according to the famous Gutenberg-Richter’s relation expressed as lgN=a-bM,by using the moderate and small events that occurred in and around the source area.The results show that the linear goodness of fitting varies abnormally prior to these moderately strong earthquakes.In the early stage of the earthquake preparatory process,distribution of the energy released through small events in and around the source area is isostatic and the fitting goodness approximates 1,while the distribution of the energy turns to be isostatic before moderately strong earthquakes,leading to the obvious decrease of the linear goodness of fitting.This phenomenon could be a medium term anomaly and a medium term criterion for moderately strong earthquake prediction. 展开更多
关键词 RELATION between earthquake frequency and MAGNITUDE Linear GOODNESS of fitting Medium TERM criterion for moderately strong EARTHQUAKES
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Connection between Concrete Layers with Different Strengths 被引量:1
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作者 Jae Yoon Kang Jong Sup Park +1 位作者 Woo Tai Jung Moon Seoung Keum 《Engineering(科研)》 2015年第7期365-372,共8页
As part of a research intending to develop steel-concrete hybrid girder using ultra high performance concrete with compressive strength of 80 MPa, this study conducts loading test on this girder to investigate the met... As part of a research intending to develop steel-concrete hybrid girder using ultra high performance concrete with compressive strength of 80 MPa, this study conducts loading test on this girder to investigate the methods for its composition with a slab using 30 MPa-concrete and the corresponding interfacial behavior. Prior to the loading test, the design formula of the Eurocode for the shear resistance developed in concrete-to-concrete interface is examined for the interface between concrete layers of different strengths. The effect of the surface roughness on the shear resistance is examined using this formula and finite element analysis to verify the applicability of the formula. Based upon the results, loading test is conducted on girder specimens to evaluate the actual behavior with respect to the interfacial surface condition. The test results reveal that the specimen with rough interface could not develop perfectly composite behavior and experienced adhesive failure. In case of simultaneous action of flexure and shear, it appears that conservative design should be applied without consideration of the interfacial condition when determining the arrangement of shear reinforcement. 展开更多
关键词 Shear Resistance Interface between CONCRETE LAYERS Surface ROUGHNESS STEEL-CONCRETE Hybrid GIRDER Ultra High Performance CONCRETE (UHPC)
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A Discussion about the Gap between Teaching and Learning
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作者 刘芳 《海外英语》 2010年第11X期108-109,共2页
The gap between teaching and learning can be caused by a lot of factors such as psychological,cultural,and linguistic ones. In different teaching contexts,the influence of these factors may vary differently. Thus,it i... The gap between teaching and learning can be caused by a lot of factors such as psychological,cultural,and linguistic ones. In different teaching contexts,the influence of these factors may vary differently. Thus,it is necessary for language teachers to take a serious attitude towards the gap between teaching and learning and make appropriate measures accordingly so that they can promote successful teaching/learning outcomes in the language classroom. 展开更多
关键词 The GAP between TEACHING and learning TEACHING CONTEXT measures
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Contrastive Study of Metadiscourse in the Conclusion of Academic Papers between Soft Science and Hard Science
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作者 徐伟伟 《海外英语》 2014年第3X期209-210,共2页
Academic paper as a genre is communicative.Interactional metadiscourse is one of the linguistic features that can significantly show the communicative feature of texts.With different research methodologies and charact... Academic paper as a genre is communicative.Interactional metadiscourse is one of the linguistic features that can significantly show the communicative feature of texts.With different research methodologies and characteristics,academic papers of hard and soft science present different degree of communicative features.The corpus of this study consists of 16 academic papers among which 8 are from hard science and 8 from soft science.This article aims to explore the different ways of scholars from soft and hard science to use metadiscourse in the conclusion part of their academic papers to exert lights to the pedagogical development of academic papers. 展开更多
关键词 academic papers between Soft SCIENCE and HARD scie
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Principle of Interaction between Plastic Volumetric and Shear Strains and the Constitutive Model for Geotechnical Materials 被引量:2
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作者 Wang Jingtao(1.Department of Architectural Engineering, Xinyang Normal University, Xinyang 464000, Henan, China 2.School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China) 《工程科学(英文版)》 2007年第2期129-138,共10页
Here is proposed the principle of interaction between plastic volumetric and shear strains, revealing the main origin of generating the complexity and variety of deformations for geotechnical materials. Here are also ... Here is proposed the principle of interaction between plastic volumetric and shear strains, revealing the main origin of generating the complexity and variety of deformations for geotechnical materials. Here are also explained the manners of the interaction between plastic volumetric and shear strains and the conditions of generating shear dilatancy. It is demonstrated that dependency of the stress path exists and is a combination of effects of this interaction. According to this principle, it is theoretically proved that the space critical state line exists, and is unique and independent of the stress history. Based on this principle, the constitutive models that are able completely and accurately to characterize the basic behavior features for geotechnical materials have been constructed within the framework of thermodynamics. What is determined is a general expression of the constitutive relation as well as the inequality of the dissipative potential increment for obeying the second law of thermodynamics. 展开更多
关键词 INTERACTION between VOLUMETRIC and SHEAR strains constitutive model for rock and soil dependency of stress path pressure-sensitivity SHEAR DILATANCY
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CONTINUAL CONDITIONS BETWEEN LAYERS FOR LAMINATED PLATES
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作者 张慎学 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第9期1054-1060,共7页
In this paper, various forms of functional on blending energy principles of composite laminated plates are given, which guarantee satisfied continual conditions of displacements and stress between layers, and then the... In this paper, various forms of functional on blending energy principles of composite laminated plates are given, which guarantee satisfied continual conditions of displacements and stress between layers, and then the reliability of the functional are proved by the computing example. 展开更多
关键词 LAMINATED PLATES continual CONDITIONS between LAYERS BLENDING energy functional
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On the Relationship between the Original and the Translated Version——The Interpretation of Benjamin's Three Metaphors
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作者 孙静 《海外英语》 2014年第20期162-163,167,共3页
This paper explores the relationship between the original and its translation by interpreting Benjamin's three metaphors from his The Translator's Task. The exploration starts with the metaphor of"the tan... This paper explores the relationship between the original and its translation by interpreting Benjamin's three metaphors from his The Translator's Task. The exploration starts with the metaphor of"the tangent of a circle",where it is interpreted that although the translated version should be faithful to its original in terms of meaning,yet it is a deviation due to different internal and external factors. Then,in the metaphor of"afterlife",the discussion demonstrates that the translated version proceeds from the original,but the original depends on it for its survival and afterlife in different eras. Later,based on the metaphor of"fragments of a vessel",the author states that the original and its translation are equal and complementary,just like the fragments of a vessel,responsible for the development and renewal of each other through translation. Finally,it is concluded that a better understanding of their relationship can offer us a new perspective in translation studies and practice. 展开更多
关键词 relationship between the ORIGINAL and the translat
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Study on the Theory and Method on Identification of the Mobile Block in the Face-Contacted Blocks Structure in Rocks Between Coal Seams to Mine the Left-over Coal Above the Gob
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作者 Guorui Feng,Lixun Kang,Xuyan Zhang Institute of Mining Technology,Taiyuan University of Technology,Taiyuan 030024,China. 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期180-180,共1页
In mining the left-over coal above the gob,stope wall rock of mining area have hard limestone.through field observation,the face-contacted block structure was found in rocks between coal seams to mine the left-over co... In mining the left-over coal above the gob,stope wall rock of mining area have hard limestone.through field observation,the face-contacted block structure was found in rocks between coal seams to mine the left-over coal above the gob.In order to probe into the movement law of rock strata and strata control measures,it is very important to identify the mobile block in face-contacted block structure of rocks between coal seams.This paper relies on the thought of block theory to establish appropriate parameter matrix and figure out its discrimination matrix in view of the fact that the block in face-contacted block structure has high intensity and stiffness,the 展开更多
关键词 MOBILE BLOCK ROCKS between COAL seams rock mechanics IDENTIFICATION of the MOBILE BLOCK
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The Development and Research on the Coordinate Control Strategy Between Turbine and Boiler in Fossil Power Plant
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作者 WEI Shuangying (Management School,Wuhan University of Technology,Wuhan 430070,China) 《武汉理工大学学报》 CAS CSCD 北大核心 2006年第S1期363-366,共4页
Based on the research on domestic and international automatic technical development in fossil power plant,the paper analyses the recent situation of the coordinate control system between turbine and boiler of domestic... Based on the research on domestic and international automatic technical development in fossil power plant,the paper analyses the recent situation of the coordinate control system between turbine and boiler of domestic fossil Power Plant,provides the development thought of coordinate control system between turbine and boiler,and describes the application prospect in control system of fossil power plant combining with the application experience. 展开更多
关键词 FOSSIL power PLANT COORDINATE control system between TURBINE and BOILER development and research
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