龙子祠泉域水环境特征

根据多年来工作中收集到的资料,描述了龙子祠泉域的概况、地层及泉域构造控水特征,总结了泉域主要含水层特征和泉域地下水的补给、径流排泄条件。说明了泉域重点保护区的范围、泉域岩溶地下水资源及其开采利用。     

三姑泉域岩溶地下水资源量评价

三姑泉域岩溶地下水目前已经出现超采,为确保泉域岩溶地下水的可持续开发,根据1956-2000年和1980-2000年两个系列的资料,采用均衡法对泉域岩溶地下水资源量进行了评价,即用排泄量法进行计算,用补给量法进行校核.结果表明,三姑泉域岩溶地下水资源量为7.18 m3s.     

延河泉域岩溶地下水位动态特征及其影响因素

介绍了延河泉泉域概况,研究了泉域岩溶地下水水位资料,分析了岩溶地下水动态特征及其影响因素。     

延河泉域岩溶地下水数值模拟研究

在分析晋城市延河泉域地质、水文地质条件的基础上,建立了泉域岩溶地下水的概念模型和数学模型,采用基于迦辽金(Galerkin)有限单元法的AQUA3D软件对泉域岩溶地下水资源进行数值模拟研究.通过模型识别与检验,将岩溶地下水位数值模拟计算值与实测值较好地拟合,表明所建模型是合理和有效的,可以用于实际.据此用所建模型计算了两个降水方案条件下的泉域岩溶地下水可开采资源量,最终确定可开采资源量为6.26 m3/s.研究结果可为泉域岩溶地下水开发利用和保护提供科学依据.     

黄河下游断流趋势初步分析

应用最小二乘法,三重指数平滑法,指数曲线法,累积预测法和回归分析法对１９７２－１９９７年黄河下游断流数据进行了断流历时和断流河长趋势预测。结果表明,到２００４年或２００８年可能出现黄河下全年断流的局面;以１０年为周期,２０２１－２０３０年年平均断流河长可达到９２７ｋｍ,２００１－２０１０年年最长断流河长可达到９６５ｋｍ,即黄河下游洒道将全部断流,最后对黄河断流趋势进行了综合分析与讨论。     

济南泉域裂隙岩溶水系统管理模型

针对济南泉域裂隙岩溶水系统开发的实际,提出了确定决策变量权重的新方法,建立了新的泉域地下水系统管理模型,并进行了两个方案的优化管理,得到了满意的结果。对解决我国北方岩溶泉域地下水资源开发与泉群保护的矛盾探索出了一条新路。     

延河泉域岩溶地下水资源量评价

为了确保延河泉域岩溶水的可持续利用,根据1956—2000年和1980—2000年两个水文系列,利用排泄量法对泉域岩溶地下水的天然资源量进行了评价,同时采用补给量法进行了校核。结果表明,延河泉域岩溶地下水多年平均天然资源量为11.53 m3/s。本项成果可为有关部门进行泉域岩溶地下水开发和保护提供科学依据。     

加强水政建设 搞好泉域管理

由于人为不合理的大量开采地下水 ,水资源濒临枯竭的危险。因此 ,加强水政建设 ,规范水资源开发利用秩序 ,就成为当前乃至今后搞好泉域管理 ,促进泉域水资源可持续发展的有力保证。     

郭庄泉流量变化特征分析

通过对郭庄泉年际、年内流量多年动态变化资料的统计,分析了郭庄泉流量变化的原因,为郭庄泉合理开发利用及泉域保护提供了科学的依据。     

黄河断流及可持续发展对策

本文针对 90年代以来黄河断流的严重态势 ,具体分析了黄河断流的特点 ,对造成黄河断流的成因进行了分析 ,最后指出了如何缓解黄河断流的对策     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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.     

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     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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.     

Editorial note for the special topic on ＂Nanopore Analysis＂

The concept of nanopore analysis, using the pore-forming protein a-hemolysin to detect individual nucleic acids at a single-molecule level, was first proposed in 1996. Over the past two decades, tremendous progress has been made in the nanopore field, and nanopore analysis has become a label-free and high-throughput method for probing bio- molecules and other analytes with single-molecule sensi- tivity, especially holds the promising for ＂third generation＂ DNA sequencing. However, challenges still remain in the experimental strategies and the design of whole nanopore-based instruments. Here, we proudly present a special topic dedicated to the topic of ＂Nanopore Analysis＂, with 8 reviews/articles providing up to date coverage of the experimental strategies, theoretical calcu- lations and simulations, and instrument design. Reviews and articles on the experimental strategies cover control of DNA partitioning into a nanopore, detection of target DNA, and the advantages of nanopore-based DNA sequencing. The theoretical calculations and simulations discuss the translocation behavior of DNA, and an inte- grated measurement system and data analysis software are presented for instrument design.     

Effects of climate change on biodiversity

1 Rise of studies on climate change＇s effects on biodiversity
Until the 1980s, climate change and biodiversity were studied as two independent disciplines for more than a century. In 1992, the Ecological Society of America＇s annual report named climate change, biodiversity, and the sustainable ecological system as the three major global environmental issues of the twenty-first century [1].     

Discussing the Expansive Learning in Modern Organizations

<正>1 Introduction Endeavours on learning methods have long occupied the mind spaces of scholars and there have been theories abound on how people learn and in what way organisations can use some of the knowledge gained in the art of learning to maximise human productivity.While the theories by themselves are not solutions to problems,they are steps of inquiry that provide us with interesting perspectives that we can use to extend our knowledge of the dimensions of learning.This paper is an exploratory work on the theories postulated by three notable scholars including Zimmerman