EVALUATION OF ECOLOGICAL SERVICES OF JILIN PROVINCE, NORTHEAST CHINA

1INTRODUCTIONEcosystem services can be divided into two major cat-egories, one is system function, and the other is sys-tem services and goods provision, which provide not only materials such as food and medicine, but also support and maintenance of whole system. Ecological services contribute to the whole economic system, both directly and indirectly, and consequently repre-sent parts of the total value of our economy system (COSTANZA etal., 1997; GUO etal., 2001). Sustainable d…     

Comprehensive evaluation on urban sustainable development of Harbin City in Northeast China

It is an effective way in realizing urban coordinated and sustainable development to establish a series of indicators and to evaluate urban environmental and socioeconomic development. According to the characteristics of Harbin City in Northeast China, an indicator system including five subsystems and 37 indicators was established for comprehensive evaluation on urban sustainable development. The development indexes of all urban subsystems and complex system were calculated quantitatively using the comprehensively integrated methods composed of Principle Component Analysis, Analytic Hierarchy Process and weighed index method, and then the comprehensive level of urban sustainable development and the degree of urban interior coordination were analyzed. The results indicated that 1) the overall urban development presented an uptrend, however, the interior development was not well balanced from 1996 to 2006; 2) the development in each subsystem presented a strong fluctuation; and 3) the development in resources subsystem showed a downtrend. Based on those results, the suggestions of urban sustainable development were put forward at the end.     

http://www.sciencedirect.com/science/article/pii/S1674987111001290

The Three Gorges Dam(TGD) of the Yangtze River.China,is one of the largest irrigation and hydroelectric engineering projects in the world.The effects of huge man-made projects like TGD on fauna and macrophyte are obvious,mainly through changes of water dynamics and flow pattern;however, it is less clear how microorganisms respond to such changes.This research was aimed to examine differences in microbial diversity at different seasons and locations(in front of and behind the TGD).In addition, differences between particle-attached and free-living communities were also examined.The community structures of total and potentially active microorganisms in the water columns behind and in front of the TGD were analyzed with the DNA- and RNA-based 16S rRNA gene phylogenetic approaches over three different seasons.Clone libraries of 16S rRNA genes were prepared after amplification from extracted DNA and.for some samples,after preparing cDNA from extracted rRNA.Differences were observed between sites at different seasons and between free-living and particle-attached communities.Both bacterial and archaeal communities were more diverse in summer than in winter, due to higher nutrient levels and warmer temperature in summer than in winter.Particle-attached microorganisms were more diverse than free-living communities,possibly because of higher nutrient levels and heterogeneous geochemical micro-environments in particles.Spatial variations in bacterial community structure were observed,i.e..the water reservoir behind the TGD(upstream) hosted more diverse bacterial populations than in front of the dam(downstream),because of diverse sources of sediments and waters from upstream to the reservoir.These results have important implications for our understanding of responses of microbial communities to environmental changes in river ecosystems affected by dam construction.     

高美古与凤凰山水汽含量的统计分析

介绍了利用北京师范大学研制的ＩＲＡ－９３５型红外水汽测量仪对云南丽江高美古天文候选点及昆明凤凰山对比点上空垂直大气水汽积分含量Ｗ０的观测结果,给出了两地Ｗ０的日变化曲线及分布图,并对全年测量数据的统计结果作了分析和讨论     

位移时空综合分析法及其在边坡工程中的应用

以往对监测位移数据分析方法主要是位移-时间关系分析。但监测数据包含了大量对工程设计和施工都很有用的信息,其中不乏位移-空间方面的信息;另一方面,从工程设计和施工角度看,除需要位移-时间信息外,还需要位移-空间信息。位移时空综合分析法的提出旨在综合位移-时间和位移-空间等两方面的信息,为工程设计和施工服务。该方法依表现形式不同又分为竖线法和曲面法两种。本文将通过五强溪船闸边坡工程实例,来进一步说明位移时空综合分析法的原理及其应用。     

The calculation of mine water yield using the non-continuous flow theory

Large amounts of groundwater are discharged during underground mining operations. As a result, the drawdown of groundwater, known as aquifer dewatering, is common in mining areas. Because of variability in permeability between different media in mines, mine drainage occurs primarily as non-continuous flow. However, calculations of mine water yield are usually made based on the continuous flow theory, and therefore often produce erroneous results. This study predicts the water yield of a mine using the module MODFLOW and incorporating the non-continuous flow theory into the calculation. Using this method, the predicted water yield of a mine was approximately 50 % lower than that predicted using the continuous flow theory. The model also demonstrates that the rate of mine drainage varies over time; there is initially a decrease in the rate of drainage which gradually approaches a constant value. Double level flow occurs when there is non-continuous flow in continuous media, which can effectively minimize the influence of mine drainage on upper aquifers and relieve the conflict between groundwater supply and drainage in the mining area.     

SharpMap在青海省气象信息网络数据库中的应用

在 .NET环境下开发了基于B/S结构的青海省气象信息网络数据库。该数据库系统由气象信息基础数据库、数据库管理网站及一个空间信息平台构成。气象数据能够实时入库,并具有底图制作、基于地图的数据检索、数据统计和图形绘制等功能,将查询结果叠加在电子地图上显示,直观方便。系统于2009年在青海省气象台投入使用,提高了青海省气象台气象数据共享能力和服务水平,并为青海省气象台的各项业务工作提供了有力的支持。系统采用SharpMap技术实现了空间信息平台,并应用Ajax等技术提高了系统效率,本文对其在网络数据库中的应用     

智能潜器的集成仿真系统

本文介绍了智能潜器集成仿真系统的硬、软件结构．通过这一系统所展示的水下虚拟仿真环境能够在研究和开发智能潜器的控制体系结构、潜器载体的水动力学、信息融合和目标识别等工作中发挥巨大作用     

塔里木盆地西北缘新元古代震积岩的发现及其地质意义

震积岩是地层中记录古地震事件的关键岩石记录,通过震积岩的识别和发育序列的研究有助于认识盆地形成的构造背景和区域大地构造过程。在塔里木盆地西北缘的乌什南部地区新元古界中识别出臼齿构造、微同沉积断裂和液化卷曲变形等古地震引起的软沉积变形构造,发育典型的震积岩（震裂岩和震褶岩）以及震浊积岩、冰碛岩和薄层状钙质泥岩等沉积单元,并在南华系上部形成了深水浊流沉积—冰水混积—地震活动和背景沉积—地震活动等两期震积作用序列。塔里木西北缘南华系震积岩与同时期正断层紧密伴生,共同指示区域构造伸展背景,可能与新元古代罗迪尼亚超大陆裂解、大规模裂谷作用有关。