基于AHP法的宜宾市县域城镇化发展水平综合评价

以宜宾市区县为研究对象,从经济城镇化、人口城镇化、社会城镇化和空间城镇化4个方面构建县域城镇化水平的综合评价体系,利用层次分析法分析宜宾市10个区县的综合城镇化水平,并结合灰色关联度分析法和系统聚类法探讨县域城镇化发展的动力因子和区域差异特征。结果表明:经济城镇化和人口城镇化在县域综合城镇化水平评价体系中占有较大权重;县域城镇化水平空间差异显著,可分为县域城镇化水平较高地区、县域城镇化水平欠发展地区和县域城镇化水平落后地区3种类型。文章还对各类县域城镇化特征和成因进行了探讨。     

新疆人口城镇化与经济城镇化的时空变化分析

从时间序列和空间分布两方面分析2000-2013年的新疆人口、经济发展数据,应用变异系数赋权法构建新疆城镇化水平测度体系,最后基于时间变化计算新疆人口城镇化和经济城镇化的耦合协调度、人口城镇化滞后程度,利用空间分布图直观表征新疆城镇化发展的水平和速度.结果表明,新疆的人口城镇化和经济城镇化发展不协调,且在时间和空间上存在较大差异性,整体呈现"北高南低"、"东高西低"的地理分布特征.而新疆南部由于其独特的区位,与北部和东部地区相比在人口城镇化与经济城镇化上的落后性值得深思.该研究或对欠发达地区的城镇化发展提供一定的科学参考.     

湖北省人口-经济-土地城镇化的空间格局及其耦合协调性研究

建立湖北省"人口-经济-土地"城镇化指标体系,采用空间统计和数理建模,对城镇化及其空间分异和空间格局、耦合协调度进行测算.研究结果表明:1)湖北省土地城镇化水平总体较高,经济城镇化质量整体较低,人口城镇化区域差异明显;2)"人口-经济-土地"城镇化质量呈现区域间不均衡、城镇化不同步的空间格局;3)人口-经济-土地城镇化的耦合协调度整体较高,但空间差异明显,城镇化子系统内系统耦合度和耦合协调度高的地区集中在武汉城市圈、宜荆荆地区和襄十随地区等经济发达、产业集聚、空间联动效应较强的区域.     

云南省人口城镇化与经济发展关系的空间差异特征分析

人口城镇化与经济发展水平具有高度相关性,但二者是否协调发展在我国仍存在不同的观点,正确认识二者之间的关系具有重要的理论和实践意义.基于2010年第六次全国人口普查数据,选取云南省16个地州127个样本,采用象限图法和ArcGIS软件辨别2005年以来云南省人口城镇化和经济发展关系的空间格局差异特征.研究表明:省内各州市之间存在显著的空间差异特征,滇西北、滇东南以滞后城镇化为主,滇中地区以城镇化超前水平为主.城镇化与经济发展不协调占72.44%.从分析得出:部分地区城镇化超前,未来城镇化的重点应从增加城镇数量、扩大规模以及城镇人口的增长等要素增长型向提高城镇化的质量转变;另外,城镇化滞后类型区占有较大比重,这类地区城镇化动力不足,未来应加快非农产业发展或推进产业结构优化,加快城镇化步伐,并与经济发展协调演进.     

基于县域的山东省城镇化发展水平差异研究

遵循系统性、科学性、可比性及可获得性原则,从经济发展、人口社会发展、城市建设等3个方面选取了15个指标,构建了县域城镇化发展水平评价指标体系.运用主成分分析和聚类分析方法,对山东省140个县域的城镇化发展水平进行了综合评价和系统聚类.结果表明,山东省县域城镇化发展水平差异十分悬殊,空间分异格局特征非常明显,具体表现为:东部地区高于西部地区、沿海高于内陆、沿交通线地带城镇化发展明显高于其他地区.最后从自然条件、区位条件、经济发展水平等方面对影响县域城镇化发展的因素进行了深入探讨.     

基于GIS的辽宁省城镇化空间演变特征分析

城镇化空间演变特征的分析是研究区域城镇化发展的关键.在梳理相关研究成果和研究方法的基础上,采用多维度综合评估、GIS技术空间分析的方法,选取人口、产业、用地、教育、居民服务5个指标,探讨辽宁省城镇化空间演变特点,以及5个指标间的协调关系.通过对辽宁省的实证研究发现,人口、产业、教育、用地、居民服务的城镇化指标值在空间演变方面既有相同点又存在差异性.高值区主要分布在沈阳、大连及其周边城市,而辽西北地区各项指标值一直处在较低的水平,城镇化地区发展不均衡,两极分化严重;随着城镇化速度加快,各要素在发展变化过程中的冲突与矛盾增多,指标间表现不协调.     

四川省人口城镇化与土地城镇化协调发展时空演变研究

以四川省作为研究区域,建立人口城镇化与土地城镇化质量指标体系,采用变异系数法和耦合协调发展度模型对四川省及各地市2003—2014年人口城镇化与土地城镇化指数及二者的协调发展度进行测度,并结合空间分析方法对各地市的协调发展度进行了分析.结果表明:四川省的协调发展度同人口城镇化与土地城镇化呈阶段式增长,2014年总体上达到高度协调发展水平;各地市人口城镇化与土地城镇化整体上呈上升趋势并呈现出了不同的发展类型,其中人口城镇化发展呈现出了高速增长型、波动起伏型等4种类型,土地城镇化发展呈现出了高快高、高慢低等6种类型;在空间视角下四川省各地市的人口城镇化与土地城镇化协调发展度总体上呈上升趋势,各地市协调发展度平均水平由2003年的0.36增长至2014年的0.58,并且所有城市在2014年都已达到中等磨合协调发展及其以上水平;不同区域间的人口城镇化与土地城镇化协调发展度"区域同质化"带动作用显著且受地区社会经济发展状况影响较大;2007年为四川省各地市协调发展速度的分界点.     

福建省县域城镇化发展水平空间自相关分析

从空间、人口、经济、社会生活四方面选取17项指标构建了评价福建省县域城镇化发展水平的指标体系.通过主成分分析方法得出各县域城镇化水平的综合得分.以综合得分为变量对福建省县域城镇化水平进行空间自相关分析.结果显示:福建省县域城镇化发展水平存在较强的空间相关性。即城镇化水平高的县域之间相邻,城镇化水平低的县域在空间上也相邻:同时福建省区域中心城市对其周边县域城镇化的推动作用不强.     

中国地级市土地城镇化与人口城镇化协调发展的空间格局分析

在分析土地城镇化与人口城镇化协调发展机理的基础上,分别构建人口城镇化子系统与土地城镇化子系统的指标体系,综合运用熵权法和系统藕合协调度模型,以289个地级(以上)市为研究对象,测度地级(以上)市土地城镇化与人口城镇化协调发展度,并采用泰尔指数、探索性空间数据分析方法探讨其空间分异特征.主要研究结论:(1)土地城镇化与人口城镇化协调发展度的平均值为0.709,超过62%的地级市处于勉强协调级、濒临失调级和失调级,这表明我国土地城镇化与人口城镇化的协调发展度总体不高,提升空间很大.(2)城镇化协调发展度呈现由东部沿海地区向西北内陆地区递减的阶梯状分布态势,总体来说,东部地区(0.761)中部地区(0.717)西部地区(0.681).(3)土地城镇化与人口城镇化协调发展度呈现空间正相关,其空间集聚状态可以分为4种:高值集聚区(主要分布在东部沿海地区)、高值异质区域(零星分布在西南地区)、低值异质区域(主要集中分布在华北和中部地区)及低值集聚区(主要集中分布在陕甘地区、云川地区的部分地市).这个结论能够为区域之间城镇化协同发展政策的制定提供理论依据.     

基于熵值法的关天经济区新型城镇化发展水平及空间差异分析

目的建立关天经济区新型城镇化综合水平的评价指标体系,并对空间差异进行定量分析。方法通过收集关天经济区相关数据,利用熵值法对新型城镇化发展质量进行了综合测度,从人口城镇化、经济发展、土地城镇化、社会发展、生态环境5个方面,建立了衡量关天经济区新型城镇化水平综合评价指标体系,并运用Pearson法对各指标与综合发展水平进行相关分析。结果关天经济区新型城镇化综合水平划分为5个等级:高质量地区(西安)、较高质量地区(宝鸡)、中等质量地区(铜川、咸阳)、较低质量地区(渭南)和最低质量地区(商洛、天水)。结论 1新型城镇化综合水平总体存在差异,呈现出两端发展低,中间突出的特点;2西安作为省会城市,经济、社会城镇化发展迅猛,但生态环境建设水平最低,其他城市各项指标发展水平的整体差异不大,但总体上处于低水平均衡状态;3社会城镇化、经济城镇化与新型城镇化综合发展水平相关性最显著。     

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.