基于DNS模型的我国公司债信用利差预测

利用2012~2017年我国国债、公司债、宏观经济及公司特征的月度数据,基于无风险收益率和公司债信用利差期限结构的动态Nelson-Siegel（DNS）模型,提取无风险收益率曲线和公司债信用利差曲线的水平因子、斜率和曲率,采取向量自回归模型和面板回归方法对我国公司债信用利差进行样本内和样本外预测。结果表明：我国公司债信用利差可以由无风险收益率期限结构及公司债信用利差期限结构中包含的信息进行预测;宏观经济变量和公司特征变量对我国公司债信用利差的预测贡献较小。     

我国国债发行规模的协整性分析及误差修正模型

运用计量经济学的方法对我国国债发行规模进行了实证性分析,发现我国对数的国债发行规模与对数的国内生产总值之间存在着协整关系。在此基础上建立了我国国债发行规模的误差修正模型,结果表明该模型对我国国债发行规模的预测值与实际值有很高的拟合优度。     

简析宏观经济因素与人民币汇率的关系

本文其他学者研究的基础上更新了考察时期,对宏观经济因素与人民币汇率的关系的响进行分析,考察了1986年～2006年,几个代表宏观经济因素的变量与人民币汇率的关系。实证分析结果表明,人民币实际有效汇率与所考察的各宏观经济变量之间存在着长期稳定的关系。这种长期稳定关系的存在能从一个侧面反映出在考察期间内人民币汇率的调整和变化是适应中国宏观经济内外平衡需要的。     

我国商业银行信用风险管理浅析

随着金融全球化,金融自由化趋势的加强,我国商业银行进行信用风险管理显得格外重要。但是由于种种原因我国商业银行信用风险管理在理念、技术、机制上存在着明显缺陷。针对这些缺陷我国商业银行应积极地培育信用风险管理理念、提高信用风险度量和管理技术、建立科学的信用风险管理体系。     

我国国债风险预警系统的构建及其实证检验

从国民经济应债能力、财政应债能力以及国债期限结构三方面构建了我国国债综合风险指标，并通过AHP法对各风险因子进行赋权，初步构建了我国国债风险预警系统。并对1990～2009年我国的国债风险状况进行了实证检验，结果表明，20年来我国国债的综合风险一直处于轻警区，但是财政应债能力和国债期限结构存在着较大的风险。     

典型相关分析法在我国财政政策与宏观经济发展分析中的应用研究

利用典型相关分析法研究了财政政策对我国宏观经济发展的影响,指出了财政政策与我国宏观经济存在着显著的相关关系,发现财政政策以财政支出政策和税收政策为主,财政支出政策、公债政策、税收政策与预算政策有一定的相互抑制作用。并且,扩张性财政政策行为所体现的总体增长率增加1单位,可使宏观经济发展总体增长率增加0.765单位。这些结论可以为政府制定政策提供决策依据。     

中国货币政策中间目标变量的选择

利用互协关系检验（ｃｏ－ｉｎｔｅｇｒａｔｉｏｎｔｅｓｔｓ）的方法,考察我国的货币总量Ｍ０、Ｍ１和Ｍ２与其他主要宏观经济变量之间是否存在一种长期的稳定关系．结果表明,Ｍ２与工业生产总值ＧＩＰ、企业１年期短期名义贷款利率ｒ之间存在着长期稳定关系,由此估计出的货币需求函数有较好的统计性质,因此,Ｍ２应是我国的货币政策中间目标变量的首选对象．     

我国国债市场存在的问题及对策研究

在社会主义市场经济条件下,国债的发行与投资具有重要意义。目前,我国国债市场存在着发行规模偏小,品种结构不合理,交易形式单一,管理体制不健全等问题。笔者认为改善国债投资环境,应着手调整国债一级市场的发行对象,调整国债的期限结构和利率结构,扩大国债交易市场,并加强国债市场的规范化建设。     

基于结构关系识别的中国汽车销量预测

准确的销量预测有助于汽车企业合理安排生产计划.提出采用包含单位根检验、格兰杰因果检验、弱外生性检验以及协整检验的结构关系识别方法来研究中国汽车销量与宏观经济变量之间的动态联系.其中,宏观经济变量主要考虑了汽油价格、消费者信心指数、居民消费指数和钢材产量,收集了2007~2016年的月度数据,构建了用于实证的数据集.研究表明中国汽车销量与识别的内生变量间存在着长期的协整关系,基于此,构建向量误差修正模型以量化这些变量对中国汽车销量的长期影响.与传统时间序列方法的比较表明,所提方法能提高预测精度,更好地反映中国汽车销量与宏观经济变量之间由短期偏离向长期均衡调整的动态过程.     

我国商业银行信用风险管理存在的问题与对策

以我国商业银行信用风险管理为切入点,对我国商业银行信用风险管理中存在的问题进行了探讨,并对完善我国商业银行信用风险管理体系提出了相应的建议。     

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)

正~~     

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