基于多层次灰色方法的旅游资源开发潜力评价——以巴中南阳森林公园为例

以巴中南阳森林公园为研究对象,从资源价值、开发条件、开发效益3方面选取15个指标构建评价指标体系,采用多层次灰色评价方法对景区旅游资源开发潜力进行综合评价,得出4个景区旅游资源开发潜力顺序,以期对景区开发规划具有现实指导意义。     

基于多层级灰色理论的重金属污染水资源开发潜力评价——以湘江长株潭段为例

利用多层次评价法甄选与湘江长株潭段密切相关且关联系数超过0.51的指标,赋予相应的权重值.通过建立灰色束函数和灰色矩阵计算重金属污染下湘江长株潭段水资源开发潜力大小.结果表明,多层级灰色理论可用于对水资源开发潜力的评价过程中.湘江长株潭段水资源开发潜力系数为2.983,属于次高层级范围[2.500,3.250]之内,说明湘江长株潭段水资源开发潜力在一定时间范围内都比较高.     

基于组合评价方法的城市地下空间详细规划方案评价

为了分析评价和优化改进规划方案,建立了以功能耦合度为评价目标的城市地下空间详细规划方案评价方法体系.从功能类型、开发规模、空间布局以及相互联系4个方面建立了3层次11项底层指标的城市地下空间详细规划方案评价指标体系,提出了地下空间功能类型多样性、地下空间容积率、地下空间开发强度一致性等评价指标,并在指标设计中采用了ShannonWeaver指数、变异系数等数学方法.同时还提出了基于层次分析法与熵值法组合权重赋值方法的综合评价方法.最后以无锡市城市地下空间详细规划为实例进行分析评价,评价结果表明,该方法能反映技术方案样本的特征差异,可有效评价方案的合理性.     

基于熵权-层次分析法的地下空间适宜性评价

较为客观地评价城市地下空间开发适宜性,是科学合理有效利用城市地下空间的前提和依据。提出熵权-层次分析法以实现权重的客观分析计算,综合考虑影响城市地下空间开发的主要地质因素,采用层次分析法建立评价指标体系,运用模糊综合评判法评价地下空间开发适宜性,并使用ArcGIS生成地下空间开发适宜性分区图。评价结果表明,郑州市地下空间开发非常适宜区占研究区面积的22.64%,适宜区占34.41%,一般适宜区占35.90%,不适宜区占7.05%。该评价结果较为客观、合理,可以为郑州市地下空间开发整体规划提供参考。     

城市地下空间开发需求与评估指标体系探讨

世界各国、各城市对地下空间空前的使用需求给地下空间的开发提出了新的课题.地下空间使用需求特性、地下空间开发优势,是地下空间开发时必须要考虑的主体因素.完善的地下空间开发评定指标体系能较全面地考虑城市地下空间开发的各影响因素,完善对城市地下空间开发的综合评价,决策地下空间的开发,优化地下空间开发方案,提高城市地下空间开发的有效性、合理性、经济性、安全性.     

南昌市城市空间开发生态适宜性评价

近年来,随着城市空间开发的加快,土地利用方式的改变、人口的过度集中、自然资源的过度使用,造成了一系列生态环境问题。以南昌市为例,从资源环境承载力和经济发展潜力两方面出发,构建了包括2项Ⅰ级指标、8项Ⅱ级指标和20项Ⅲ级指标的城市空间开发生态适宜性评价指标体系;采用模糊综合评价方法计算其城市空间开发生态适宜性指数,并将南昌市空间范围划成了高适宜区、中等适宜区、低适宜区和不适宜区,探讨了南昌市未来城市空间开发方向。     

地下空间社会与环境效益的定量评价模型

围绕城市地下空间开发的功能,通过"有无对比法"和"地上地下对比法",探讨城市地下空间开发的社会和环境效益,提出一种定量化效益评价模型.结果表明:城市地下空间开发对城市发展促进作用明显;节约土地效益占总效益的比例最大,其次为节约时间效益;节约土地、减少空气污染、减少噪声污染等效益为地下空间开发的溢出效益,这些效益可以通过税收等手段进行内部化,并可作为城市公共地下空间建设的融资手段和决策依据.     

山地城市核心区地下空间开发适宜性三维评价

针对山地城市核心区特殊的地形地质、区位价值、建设现状等条件,利用三维精细化评价基本单元体划分城市地下空间,采用层次分析法构建适宜性评价因子体系,并建立敏感因子–模糊–变权复合模型作为评价计算方法,实现了山地城市核心区地下空间开发适宜性三维评价,可为地下空间开发三维规划提供指导和借鉴.以重庆市渝中半岛为例,获得其0～15...     

基于低碳目标的上海松江新城北部片区空间发展潜力评价

基于低碳目标的城市空间发展潜力研究是实现低碳化城市空间规划的基础.以城市空间低碳化为目标,运用GIS技术,选取空间导向资源和价值导向资源作为空间资源评价项目.在此基础上,选取土地发展潜力、产业空间发展潜力、空间人口承载潜力3个评价项目建立了基于低碳目标的城市空间发展潜力评价方法.利用该方法对上海松江新城北部片区的空间发展潜力进行评价,为基于低碳目标的城市空间规划提供了新的视角和依据,是对城市空间研究的有益探索.     

陇南市旅游资源开发潜力评价

以陇南市旅游资源为研究对象,运用层次分析法(AHP)对各指标进行权重赋值,并通过灰色层次分析法评价了旅游资源开发潜力,得到陇南市旅游资源开发潜力综合评价值.结果表明,陇南市旅游资源体现了点多面广、分散布局的特点;旅游资源开发潜力从大到小依次为万象洞、官鹅沟-大河坝风景区、阳坝梅园沟、西狭颂风景区、秦三国文化风景区、仇池国遗址等.由此科学地确定了陇南市旅游资源的开发潜力和投资时序.     

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.     

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.     

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.