住房抵押贷款的违约特性及其定价分析

在房屋价格随机波动的条件下,通过对住房抵押贷款违约行为的经济分析,研究了住房抵押贷款价值函数的二阶性质,引入了关于违约的新条件,得出了关于违约无差异性的住房抵押贷款价值函数,进而得到了违约概率函数的精确表达式。最后,建立了住房抵押贷款价值的期望值公式。     

竞争风险模型在住房抵押贷款证券定价中的应用研究

在阐述提前偿付与违约风险测量模型的基础上，探讨了竞争风险模型在住房抵押贷款证券定价过程中的应用．指出，提前偿付与违约风险是住房抵押贷款证券投资者面临的主要风险，对其进行准确的度量是住房抵押贷款证券正确定价的前提．     

我国住房抵押贷款证券化必要性及可行性分析

通过对我国住房分配货币化、发展房地产金融市场、商业银行规避抵押贷款风险三个方面的分析,论述了我国推行住房抵押贷款证券化的必要性,并从房地产权利关系丰富、明晰、住房消费的启动和基金介入住房抵押贷款二级市场、政府可深度参与、国外先进做法及我国证券积累的经验四个方面论证了我国推行住房抵押贷款证券化的可行性。     

住房抵押贷款证券化与抵押权变更探析

住房抵押贷款证券化是房地产抵押发展的一种新趋势.本文从抵押变更登记在个人住房抵押贷款证券化中的作用入手,探讨了个人住房抵押贷款证券化涉及关系,以及需要办理抵押变更登记的项目.旨在为房地产管理部门开展抵押贷款证券化工作与抵押权变更登记管理工作提供参考.     

我国个人住房抵押贷款的信用风险与保险防范

随着我国房地产业的蓬勃发展,个人住房抵押贷款量得到了迅速扩张,其风险也日渐显现.基于我国个人住房抵押贷款的发展现状,针对购房者的违约行为分析我国住房抵押贷款信用风险的形成原因,提出了建立住房抵押贷款保险机制,防范住房抵押贷款信用风险的措施.     

我国住房抵押贷款证券化的主要模式及产品浅析

住房抵押贷款证券化(MBS),是指以住房抵押贷款为担保而发行住房抵押贷款证券,并投入流通的融资行为,它使原始的抵押贷款形式从投资者与标的物之间的直接物权关系,转化为新的债权关系。MBS是当代房地产金融领域具有历史意义的创新之一,它使得流动性差的资产转换为流动性好的债券,借以融通资金。当前,这种全新的融资方式正在全球范围内迅速推广。本文以当前我国房地产发展趋势和金融改革为基础,从我国MBS的主要模式和相关产品两方面,探讨分析了MBS在中国推行的前景和意义,指出MBS将成为中国资本市场发展重要途径之一。     

住房抵押贷款证券化信用制度的博弈分析

从住房抵押贷款证券化的概念和基本运作流程入手,说明信用对基础资产池的供给和MBS的运作的重要性.根据我国住房抵押贷款的实际情况,从2个方面进行阐述:一方面是住房消费者向商业银行负债的博弈,住房消费者决定是否申请贷款,商业银行决定是否发放贷款;另一方面是住房消费者向商业银行偿还贷款的博弈,住房消费者选择提前还款、按时还款或是违约拖欠,银行选择打官司和不打官司.通过这两方面的分析,论述了信用制度的建立和健全与银行放贷之间的依存关系,为住房抵押贷款证券化在我国的开展作了有益的探索.     

房地产抵押贷款的特殊性对抵押估价的影响分析

近年房地产业在金融行业的大力支持下快速发展,商业银行为房地产业提供了大量的抵押贷款,房地产抵押贷款的合理性也就关系着商业银行的利益。房地产抵押估价公平合理对于商业银行来说尤为重要。主要对房地产抵押贷款行为的特殊性和房地产抵押估价的特殊性对房地产抵押估价的方法选用、折现率的选用及房地产抵押价值确定影响进行了分析,使得房地产抵押估价的抵押价值更公平合理,保障商业银行和抵押者的合法利益。     

住房抵押贷款证券化过渡模式研究

本文从住房抵押贷款证券化对于国家经济发展的作用入手,阐明了建立住房抵押贷款证券化的重要性.随后,基于对我国房地产金融发展的分析,并结合世界先进国家的经验,设计出在现阶段金融体系、市场条件和法律环境下适用的过渡性住房抵押贷款证券化模式,以满足当前房地产融资的需要,并且为未来建立标准的房地产证券化制度奠定基础.最后本文对此模式运行方法做出了解释说明.     

住房购买者偿还银行贷款的博弈分析

根据我国住房抵押贷款的实际情况,住房消费者在偿还借款时可以选择提前还款、按时还款或是违约拖欠,银行根据不同情况选择打官司和不打官司.通过博弈分析,论述了信用制度的建立和健全与银行放贷之间的依存关系,为住房抵押贷款证券化在我国的开展作了有益的探索.     

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…     

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。     

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     

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     

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

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.