一种基于“流”的复合系统协调管理模型

对可用于复合系统协调管理建模的方法作了分析，并以区域经济，资源，环境协调发展问题为背景，探讨了一种基于“流”的复合系统协调管理模型的建模及协调控制方法，并就一简单的经济－资源－环境复合系统，建立了基于“流”的协调管理模型。     

复合系统整体协调度模型研究

分析了复合系统协调的协同学特征,研究了复合系统复合因子,协调度等概念,在此基础上建立了一类可以实际计算的复合系统整体协调度模型。     

科技—经济系统协调模型研究

本文以科技－经济系统为研究对象，研究其协调度的定量分析方法，建立了科技－经济系统协调度模型，应用此模型分析了某市科技－经济系统协调发展现状及趋势。     

城市交通与土地利用协调度模型研究

基于系统论的复合系统理论,结合系统协调度的本质意义,构建了城市交通-土地利用复合系统的距离协调度模型,并依此提出一种定量评价城市交通与土地利用系统协调度的新方法。本文通过对南京都市区进行实证分析,得出南京市城市交通与土地利用复合系统协调度呈凸曲线发展趋势。     

西南地区乡村生产-生活-生态耦合协调动态演化分析

在构建乡村"三生"复合系统耦合协调评价指标体系的基础上,运用改进的熵值法与耦合协调测度模型,测算了西南地区2005—2016年乡村"三生"复合系统及子系统两两间的耦合协调度,并对其演化状态进行比较与分析.结果表明,西南地区乡村"三生"复合系统耦合协调时间序列表现为失调衰退、过渡发展和协调发展3种演化类型,经历了极度失调、严重失调、中度失调、轻度失调、濒临失调、勉强协调、初级协调和中级协调8种演化状态;空间秩序呈现"极度失调均衡,严重失调与中度失调聚集,初级协调与中级协调交错"的格局演化特征.省级单元乡村"三生"复合系统耦合协调异质性较显著,子系统两两间的耦合协调发展不均衡,生活-生态系统耦合协调水平相对滞后.     

区域高等教育-经济发展复合系统协调性研究

高等教育-经济发展复合系统的协调运行已成为研究的热点,但缺乏相应的定量研究。运用系统科学理论,提出高等教育-经济发展系统协调的实质是充分利用和促进其间的积极关系,并建立了协调度模型。对1990-2003年江苏省高等教育-经济发展系统协调度进行实证分析,结果表明这一时期复合系统发展分为3个阶段:1991-1994年的无序化、1995-1998年的有序化慢速发展、1999年后的有序化快速发展,说明自1995年以来江苏省率先实施的高等教育扩张政策,与区域经济发展要求相一致,复合系统运行的协调度在不断提高。     

供应链金融系统协调度评价模型研究

论文针对供应链金融信息生态系统四元主体协调度评价展开研究,通过构建供应链金融信息生态系统四元结构模型和复合系统协调度评价模型和实例分析对其进行系统展开研究,为全面认识供应链金融信息生态系统四元主体协调度作出努力。     

安徽省乡村生产-生活-生态时空耦合研究

在构建乡村生产-生活-生态复合系统耦合协调评价指标体系的基础上,运用嫡值法和耦合协调测度模型,测算安徽省16个地级市2010—2019年乡村“三生”复合系统的耦合协调度,并对其时空特征与演化状态进行比较和分析。结果表明:安徽省16个地级市的乡村生产-生活-生态系统综合发展水平整体上均呈波动上升趋势;乡村“三生”复合系统耦合协调水平呈现中度失调、轻度失调、濒临失调、勉强协调,初级协调、中级协调、良好协调7种演化状态,总体经过了升—降—升的过程,大多数城市在10年间均有不同程度的上升,且乡村“三生”复合功能耦合协调演化地域异质性较为明显。     

1998～2008年辽宁省环境与经济发展协调度分析

在阐述环境经济协调度概念的基础上,针对辽宁省的具体情况,构建了环境系统与经济系统发展指标体系,运用系统论理论,建立了环境与经济协调度模型,计算出环境系统、经济系统以及环境经济复合系统的协调度,并进行了评价。发现辽宁经济与环境系统之间不协调,经济发展是以牺牲环境为代价的,环境也会进一步制约经济的发展,需要进一步加大环保力度,发展循环经济、实施清洁生产。     

1998～2008年辽宁省环境与经济发展协调度分析

在阐述环境经济协调度概念的基础上,针对辽宁省的具体情况,构建了环境系统与经济系统发展指标体系,运用系统论理论,建立了环境与经济协调度模型,计算出环境系统、经济系统以及环境经济复合系统的协调度,并进行了评价.发现辽宁经济与环境系统之间不协调,经济发展是以牺牲环境为代价的,环境也会进一步制约经济的发展,需要进一步加大环保力度,发展循环经济、实施清洁生产.     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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