随机内生增长模型中的福利性政府开支

通过引入福利性政府公共开支,建立一个连续时间随机经济增长模型,讨论了政府花费的波动及收入税率对经济的宏观影响,利用随机最优化方法,确定了均衡状态下的消费-财富比、期望经济增长率和关注福利的政府最优选择.     

政府花费与随机内生增长模型

把政府花费分为生产性政府花费与消费性政府花费,建立了连续时间随机内生增长模型,利用随机最优化方法,确定了宏观均衡解．在模型中讨论了政府花费及其波动对经济增长率的影响,导出了最优政府花费的构成．     

回报率不确定下随机经济增长模型

采用非期望偏好结构,引入生产性政府支出及具有不确定性回报率的政府债券,建立了连续时间的随机内生经济增长模型.利用随机动态控制方法,导出了宏观均衡解.在模型中讨论了税收、政府支出政策对宏观经济的影响,所得出的结论对于政府财政政策的制定具有重要意义.     

考虑车辆随机行为的交通流动力学模型

从研究微观个体车辆行为出发，考虑两种不同的具有不确定性的加速机制，提出了随机跟弛模型；在随机跟弛模型的基础上，得到了描述交通流宏观行为的连续性动力学方程，该方程是各项异性的，可以避免Daganzo提出的问题，对动力学方程的稳定性分析，得到稳定性判据。     

时间偏好不一致的随机经济增长模型

在随机经济增长模型中引入时间不一致偏好一双曲贴现,运用一般均衡分析方法得到宏观随机均衡,研究双曲贴现在我国低消费、高储蓄、高增长现象形成机制中的作用,讨论个体的福利得失,提出保持经济高速增长与兼顾居民福利水平提高的政策建议.     

经济系统灾害易损性的初步研究

以新古典经济增长模型为基础，提出了一种计算灾害损失与国民经济增长率影响的实用方法，并分析了灾害对经济系统稳定性的影响，为从宏观的角度定量分析灾害与经济系统之间的关系提供了一种思路。     

交通流微观模型与宏观模型的统一

交通流微观模型与宏观模型的统一陈建阳以改进的微观跟车模型为基础，利用交通流稳态特性和概率统计方法得出了交通流宏观统计模型．首次在严格理论意义上使交通流微观模型和宏观统计模型得到了统一，所得的宏观统计模型在许多方面优于传统的经验回归模型．交通流微观模型...     

交通流微观模型与宏观模型的统一

以改进的微观跟车模型为基础，利用交通注稳态特性和概率统计方法得出了交通流宏观统计模型，首次在严格理论意义上使交通流微观模型和宏观统计模型得到了统一，所得的宏观统计模型在许多方面优于传统的经验回归模型。     

中国多部门经济增长模型分析

把挪威ＯＳＬＯ模型应用到中国实际，建立了中国的多部门经济增长模型．调整中国统计资料口径差异，确定了模型中的参数．给出和分析了在既定宏观目标下各部门的最优发展路径，讨论了ＯＳＬＯ学派的观点．     

关于一般经济系统的一对对偶模型

首先建立了同时考虑“生产者-政府-消费者”行为的两个宏观经济优化模型，然后运用对偶理论证明了资源消耗最小化优化模型刚好是社会福利最大化优化模型的对偶模型，最后讨论了在经济系统中处于宏观层面的政府的均衡实现问题，并由此得到了一些有益的结论．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with