湘江—洞庭湖—长江交汇区域水环境国控断面设置认证的研究

本根据数理统计原理和多元分析方法，结合模糊数学的实际应用，对国家在两河一湖(长江—湘江—洞庭湖)区域水环境的断面设置与监控进行了系统性分析，并通过一年的实测验证，进一步确证了我国在这一区域水质监控的设置要求。为国家在这一区域水环境的每天二十四小时自动应急监控给出了技术保证。     

湘江-洞庭湖-长江交汇区域水环境国控断面设置认证的研究

本文根据数理统计原理和多元分析方法。结合模糊数学的实际应用,对国家在两河－湖（长江－湘江－洞庭湖）区域水环境的断面设置与监控进行了系统性分析,并通过一年的实测验证,进一步确证了我国在这一区域水质监控的设置要求,为国家在这一区域水环境的每天二十四小时自动应急监控给出了技术保证。     

我国水环境污染物总量控制研究的现状与展望

随着排入水体的污染物的增多和人们生活水平的提高，污染物浓度的控制已难以真正控制水环境污染．于是在水质规划中首先提出了总量控制的方法．总量控制是在污染严重、污染源集中的区域或重点保护的区域范围内，通过有效的措施，把排入这一区域的污染物总量控制在一定的数量之内，使其达到预定环境目标的一种控制手段．本文在分析了我国水环境的基本特征基础之上，阐述了我国水环境污染物总量控制的现状及存在的问题，进而指出我国水环境污染物总量控制的发展方向．     

重庆一小时经济圈水资源和水环境的保护利用

重庆“一小时经济圈”建设，为重庆“统筹城乡综合配套改革试验区”提供了一个新的平台。随着经济圈的发展，对水资源的需求将快速增长，建设活动对水环境的影响也会越来越突出。水量不足，水质变差，饮用水源地保护、城乡居民用水安全等一系列问题，迫切要求对一小时经济圈的水资源和水环境提出有效保护措施，正确处理好区域水资源、水环境与城乡统筹发展的关系。     

新场镇水环境预测及污染的综合整治措施

水环境问题是世界性的环境问题．根据新场镇水环境现状，对水体污染源做出预测，并提出了水环境综合整治方案和一系列保障措施，并根据当地实际情况提出综合整治措施，使区域人口、资源、环境、经济、社会这一系统中诸要素更加和谐合理，总效益达到最佳，对小城镇水环境保护具有重要意义．     

一种基于虚拟线圈运动矢量的车速检测方法

针对交通监控中的车速检测问题，提供了一种基于视频图像处理的车速检测方法，从CCD摄像机采集图像，在图像上的特定区域定义虚拟线圈，然后通过估算虚拟线圈的运动矢量，就可以检测经过虚拟线圈车辆的运动速度．实验结果表明，这是一种实用有效的车速检测方法．     

区域水环境信息管理系统的开发和应用

为了及时、准确地掌握区域水资源质量的状态、分布和变化规律,预测事故隐患,并在事故突发后辅助管理人员生成应急方案,该文结合地理信息系统技术,遵循系统功能层和数据层并行设计的技术路线,研究与开发了区域水环境信息管理系统.结果表明,集成了数据库管理系统、地理信息系统和人工神经网络水质预测模型的管理系统,能够实时、直观地对区域水环境信息进行可视化表达,并根据系统对警报阈值和应对建议的设置,为水资源的监测和管理提供决策支持功能.     

基于模拟软件及petri网模拟仿真的水环境评估与监控预警新技术

随着流域水环境质量日益恶化及当前水资源短缺危机日渐严重,流域水环境的治理改善、污染防治监控已刻不容缓。提出了一种较新颖的流域水环境评估及监控预警技术,探讨了ArcGIS、流域模型模拟软件DHI-MIKE及Petri网模拟仿真技术在水环境质量评估及监测预警中的应用。通过ArcGIS及DHI-MIKE软件模拟技术的联用,分析模拟了某段河流流量及BOD浓度等水文水质指标随时间变化的一维和二维动态效果图,实现对流域水环境的现状及风险评估;采用Petri网技术对流域附近某一畜禽养殖企业工艺流程及末端污染物排放进行了统计模拟,实时监测工业点源向流域水环境的排污情况,为流域水环境的改善及综合管理提供了技术支撑与保障。     

新建二次纤维造纸企业对区域水环境影响的预测

以江西省宜黄县为研究区域,在对区域内二次纤维造纸企业的排污情况做出相应环境评价的基础上,以拟新建的年产10万吨白板纸厂项目为例,将CODCr、BOD5作为监控目标,通过建立预测模型研究废水排放对水环境的影响.结果表明,拟新建二次纤维造纸企业的污水排放对宜黄河区域水环境的影响不大,当地可适当发展二次纤维造纸企业.     

水环境容量核算的实践

在回顾马鞍山市水环境容量核算这一实践基础上，从环保规划编制、区域项目环评、环境基础设施建设、产业结构调整与布局优化、环境问题查处、环境问题的进一步研究、水功能区划调整、环境管理等8个方面论证水环境容量正在发挥着重要作用。     

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

<正>~~     

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