Sustainable landscape management in Slovenia: Environmental improvements for the Velenje coal mining community 1991–2000

The Velenje area (almost 200 km² with over 31,000 inhabitants) is based on the Šalek Valley, which became a leading area of industrialisation and urbanisation after the Second World War, with consequent pollution problems. Various industrial plants polluted the river Paka while more serious hazards arose through the coal mine which is a still causing landscape subsidence and the thermal power station in the neighbourhood of Šoštanj which is a major source of sulphur dioxide and nitrogen oxide pollution. In 1987 there was an ecological protest which marked the beginning of a sustainable development strategy for the community. During the past decade programmes have dealt with the degradation of air, soil and water to achieve cleaner air, a transformation in landuse and enhancement the river's formerly weak self-purifying capabilities. This article examines the changes in the valley since the attention of the authorities was drawn to the deterioration of living conditions. Despite the pressures of transition which have seen unemployment rising to over ten percent, significant environmental improvements have been made and the area stands as a model for the rest of the country. This revised version was published online in July 2006 with corrections to the Cover Date.     

Tectonic Dynamic Metallization of Silver-GoldHydrothermal Fluids in Proterozoic GneissTerrene Shear Zones, Suichang, Zhejiang, China

-,The well-known Suichang silvengold field is located inZhejiang Province of SOutheast China. It is the largest silver-gold deposit associated with copper and zinc in the Cathaysianmetallogenic province.There are a series of silver-gold dePOsits in the shear zonesof Proterozoic gneiss terrene, Suichang region. The volcanicapparatus at Mesozoic has complicated rpineralization. Respectively, there are two pieces of understanding on the origin ofore-formigg nuid: (l ) metamorphic fluid (Lia…     

铜陵市区的烟幕分析及其预测

作者应用气象资料分析烟幕的发生规律，并应用灰色理论对烟幕进行预测。     

Is it a global change impact that the climate is becoming better in the western part of the arid region of China

Summary Monthly means of air temperature and monthly precipitation data were analyzed for 13 stations in the west part of the arid region of China in recent 43 years (1951–1993). It was obvious that air temperature was increasing in winter, but decreasing or has no trend in summer. However, precipitation in summer has increased 5 to 100 percent since 1977. Therefore, the climate seems becoming better in the west part of arid region of China. Some detailed analysis on the characteristics of rain and on the relationship between rain in basins and discharge in the upper reach of rivers in mountains were carried out. It was suggested that increasing of rainfall mainly occurred in the basins and the change in climate was caused mainly by both the global change and local environment change, such as the expansion of oases.With 9 Figures     

华北地区地震时间结构的多分形特征

利用固定半径法和直接计算法系统研究了华北地区（Ｎ３０°～４３°，λＥ１０６°～１２５°）１３个Ｋ表性子区地震时间结构的广义维数Ｄｑ—ｑ及标度指数谱ｆ（ａ）—ａ的特征，并与单—Ｄｑ—ｔ曲线进行了对比。结果表明；（１）华北地区地震时间结构为多分形结构，单一分形不能完整地描述其分形特征，应该用Ｄｑ—ｑ或ｆ（ａ）—ａ来加以分析；（２）华北强震前的０．５～２．０年．周围地区地震活动的时间多分形结构出现异常，主要表现为ｑ为负时Ｄｑ增大、ｑ为正时Ｄｑ减小，或ｆ（ａ）两端点下降，ａ跨度增大及顶点右偏等现象，这是对地震密集—平静现象的另一种描述；（３）华北地区地震时间多分形方法回顾性预报评分Ｒ＝０．４７，说明其有一定预报效能，是有前景的预报方法。     

The relationship between the first Fresnel zone and the normalized geometrical spreading factor1

Conventionally, the Fresnel zone and the geometrical spreading factor are investigated separately, because they belong to different theories of wave propagation. However, if the paraxial ray method is used for establishing the Fresnel–Kirchhoff diffraction formula for a laterally inhomogeneous multilayered medium, it can be shown that the normalized geometrical spreading factor is inversely proportional to the area of the first Fresnel zone associated with the reflection point. Therefore, if no diffracting edge cuts the first Fresnel zone, the geometrical optics approximation represents the principal part of the wavefield obtained by Fresnel–Kirchhoff diffraction theory. Otherwise, the geometrical optics approximation has to be corrected by adding edge diffractions. It is also shown that Kirchhoff-type migration and geometrical spreading factor correction both reduce the first Fresnel zone to a zone with unit area.     

关于垂直分量磁变仪的灵敏度问题

目前国内地磁台垂直分量磁变以的灵敏度都普遍偏低，不能适应一些研究工作的需要，必须予以适当的提高，本文在基本不改变仪器固有灵敏度的前提下，采取记录光线二次反射法，以提高仪器的记录灵敏度，利用这种方法既使仪器的灵敏度提高一倍同时又保证了仪器原有的稳定性。     

计算机辅助绘制流域等流时线

采用地理信息系统方法，对流域的地形地貌特征进行分析，模拟水质点在流域上的运动轨迹，并根据水质点汇流时间与汇流路径，坡度，坡长的关系，建立了流域汇流等流时线模型，经实例验证，效果较好。     

微机地理信息系统上图形编辑系统的设计与实现

图形编辑系统是地理信息系统图形工作站上必不可少的一个组成部分,它对地理信息的获取,更新及其它处理都是至关重要的。在本文中,作者阐述了在微机地理信息系统上实现图形编辑系统时,地图数据的组织结构、系统的实现环境和交互设备等方面应具备的必要前提,并介绍了一个基于微机实现的系统设计。     

Study on clouds and marine atmospheric boundary layer

A set of remote sensing instruments of Peking University, which includes mainly a dual~channel(22.235GHz and 35.5GHz) microwave radiometer, a 8mm microwave and a 5mm microwave radiometer, has been developed for the Western North-Pacific Cloud-Radiation Experiment (WENPEX). The instruments were used to observe the cloud and marine atmospheric boundary-layer in the southwest sea area of Japan in winter time from 1989 to 1991. In the weather change process, the characteristics of the marine atmospheric boundary-layer and liquid water content in cloud of this area in winter time are studied from observation data. A one-dimensional mixed layer model is presented for the growth and evolution of a cloud-topped marine boundary-layer. The model is used to study in the WENPEX. The simulation results are in agreement with observation data, especially the integral water in cloud.