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Influence of seasonal variation of neutral winds on the coupling between North and South Hemispheres in a realistic Earth main field

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Science China Earth Sciences 2009年第10期52卷 1661-1672页

作者： YANG YaFen CHEN ChuXin School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China

The neutral wind dynamo contributes significantly to the ionospheric electrodynamics, and the variation of the neutral winds thus affects the ionosphere. Here we study the effects of the seasonal variation of the winds in a realistic Earth main field. The two-dimensional ionospheric dynamo equation is expressed in the framework of a revision of the International Geomagnetic Reference Field (IGRF) under the assumptions of equipotential field lines and conservation of current. A revision of IGRF and typical uniform conductance are used to isolate the effects of the seasonal variation of the winds. Our results show that the potential and the currents in solstice seasons are much different from those in equinox seasons. The gradients of the potential are steeper in solstice seasons than in equinox sea- sons, and similarly the shell currents are stronger in solstice seasons, due to the stronger neutral winds, than in equinox seasons. Correspondingly, the Birkeland currents in solstice seasons are 2-3 times larger than those in equinox seasons, and that the Birkeland currents are much stronger in winter than in summer. Consequently, this suggests that the couplings between North and South Hemi-spheres are much stronger in solstice seasons than in equinox seasons, and likewise they are stronger in winter than in summer.

关键词： neutral winds seasonal variation shell currents Birkeland currents coupling realistic Earth main field

A realistic MODEL OF NEURAL NETWORKS

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Journal of Electronics(China) 1992年第4期9卷 289-295页

作者：顾凡及李训经阮炯 Dept.of Physiol.& Biophysics Fudan Univ.Shanghai 200433 Dept.of Mathematics Fudan UniversityShanghai 200433

A realistic model of neural networks was proposed in this *** dynamicprocess of neural impulse discharging was *** equations of the model correspondto postsynaptic potentials,receptor potentials,initial segment graded potentials and the impulsetrain along the axon *** solve the equations numerically,a recurrent algorithm and itscorresponding flow chart was also *** simulation results can imitate adaptation,post-excitation inhibition,and phase locking of sensory receptors;they can also imitate the transientresponses of lateral inhibitory network and Mach band phenomenon when they trended to *** simulation results also showed that the lateral inhibitory network was sensitive tomoving objects.

关键词： Neural network realistic model Recurrent algorithm Simulation Dynamic property

Computing Differentially Rotating Neutron Stars Obeying realistic Equations of State by Using Hartle’s Perturbation Method

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International Journal of Astronomy and Astrophysics 2013年第3期3卷 217-226页

作者： Anastasios Katelouzos Vassilis Geroyannis Department of Physics University of Patras Patras Greece

In this paper, we use the well-known Hartle’s perturbation method in order to compute models of differentially rotating neutron stars obeying realistic equations of state. In our numerical treatment, we keep terms up to third order in the angular velocity. We present indicative numerical results for models satisfying a particular differential rotation law. We emphasize on computing the change in mass owing to this differential rotation law.

关键词： Change in Mass Differential Rotation General-Relativistic Models Neutron Stars Numerical Methods realistic Equations of State

Historical Experience for and realistic Challenges to Building Security Order in the Asia-Pacific Region

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Peace 2019年第3期 34-35页

作者： Yang Mingjie CPAPD Executive Council Institute of Taiwan Studies Chinese Academy of Social Sciences

Compared with the rest of the world,the Asia-Pacific region has maintained a relatively stable and prosperous overall posture in the past three *** the ups and downs of hot security issues in the region,they have been... 详细信息

关键词： Security Historical Experience realistic Challenges to Building Security Order Asia-Pacific Region

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realistic:投放变投资的利益点

商学院 2012年第2期 19-19页

是否还记得上一部分归纳的三大原则性问题:投广告的目的是做品牌还是买市场?消费者是谁、在哪里?是投资就必须讲回报,那广告投入产出怎么衡量、大趋势下的投资机会在哪里?在入门之后,我们浓缩一下问题,进一步直指目标——投广告怎样才... 详细信息

是否还记得上一部分归纳的三大原则性问题:投广告的目的是做品牌还是买市场?消费者是谁、在哪里?是投资就必须讲回报,那广告投入产出怎么衡量、大趋势下的投资机会在哪里?在入门之后,我们浓缩一下问题,进一步直指目标——投广告怎样才能达到效果?

关键词：实力传播利益点媒体总监奢侈品消费者投资财政管理广告主 realistic

Analysis of the Dominant Features of realistic Novel Through Oliver Twist by Charles Dickens

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民营科技 2009年第1期 58-58页

作者： Han Nan (College of Foreign Languages and Communications of Shanxi University of Science and Technology, Xi’an Shanxi 710021)

Starting with the historical background of realistic period,this paper analyzes the dominant features of Oliver Twist through Dickens favorite subject matters. After summarizing the writing techniques,we get the reali... 详细信息

关键词： realistic middle class the poor

Numerical study on tensile failures of heterogeneous rocks

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第1期12卷 50-58页

作者： Ying Xu Wei Yao Kaiwen Xia State Key Laboratory of Hydraulic Engineering Simulation and Safety School of Civil EngineeringTianjin UniversityTianjin300072China Department of Civil and Mineral Engineering University of TorontoOntarioM5S 1A4Canada

Many experimental results have demonstrated the apparent discrepancy of a rock material between its flexural tensile strength measured using various bending methods and its tensile strength measured using direct tension method or Brazil disc(BD)*** understand the physical mechanism for such discrepancy,numerical simulation using the realistic failure process analysis(RFPA)is carried out in this work to simulate the tensile failure of heterogeneous *** tension and semi-circular bend(SCB)tests are simulated using RFPA for rock materials with different levels of inhomogeneity,which is characterized by the homogeneity index of the Weibull distribution used in *** numerical results show that the discrepancy in the tensile strength values is caused by the inhomogeneity of the rock ***,non-local failure criterion is adopted to calculate the characteristic length of the rock materials used in the *** is shown that below a certain value of the homogeneity index,both the characteristic length and discrepancy between two types of tensile strengths of rock decrease with increase of the homogeneity index up to a critical value,at which the discrepancy disappears and the rock material is essentially homogeneous.

关键词： Tensile strength Flexural tensile strength realistic failure process analysis(RFPA) Homogeneity index Non-local failure Characteristic length

Dickens,Influence on Bernard Shaw

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天中学刊 1990年第3期5卷 95-99,108页

作者：郭尚兴

Although the lifetimes of Charles Dickens(1812—70)and Goerge BernardShaw(1856—1950)overlapped for only fourteen years and,in a sense,theywere not writers of the same times,they were quite the same in many *** was“the greatest representative of English critical realism”and offered“amost complete realistic picture of the English bourgeois society of

关键词： representative picture realistic overlapped realism Bernard offered greatest Barbara linguist

Expressionism In Death Of a Salesman

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玉林师范学院学报 1994年第1期16卷 58-59,68页

作者： Yang Min

It is agreed by many people that Death of a Salesman relies on realistic techniques. Few people notice that there is also an element of expressionism in it. In this essay we shall discuss the expressionistic technique employed in the *** refers to a movement in Germany very early in the 20th *** the movement a number of painters sought to avoid the representation of external reality and, instead, to project themselves and a highly personal vision of the world. The term can be applied to literature. In modern literature it can be referred to as any deliberate distortion of reality. In drama, expressionism applies to a style of playwriting and production emphasizing emotional content, the subjective reactions of characters, and symbolic or abstract representation of reality.

关键词： drama themselves reality Death realistic instead agreed sought notice subjective