Lake Urmia restoration success story: A natural trend or a planned remedy?

Lake Urmia is the second-largest hypersaline lake in the world. There has been a drastic water level drop of 7.2 m from 1995 to 2016. Beginning in October 2013, the Lake Urmia Restoration Plan (LURP) launched a 10-year program. An increase in water level and a relative improvement in Lake Urmia condition has been observed since 2017. It is an undecided and controversial issue whether the recent positive trend of Lake Urmia has been due to the LURP activities or it is a natural contribution of climate factors variations. To shed some light on this issue, we examine three other lakes, adjacent to the Lake Urmia basin, with similar rainfall variability to investigate their status during the same period. Van (Turkey), Mosul, and Tharthar (both in Iraq), are evaluated as well as Lake Urmia. Three decades of remotely sensed data including precipitation ($P$), water level ($\mathit{WL}$), and lake extent ($A$) were considered for the mentioned lakes. A significant correlation was observed between standardized $\mathit{WL}-P$, and $A-P$ over the long-term period, especially for the recent three years ($R$² = 0.63–0.87). We show that the cumulative precipitation in the antecedent months played a major role in the improvement of these lakes' situation but with different time lags (up to 6 months for Van and Mosul lakes and up to 36 months for Lake Urmia and Tharthar lake). These findings could inform the planners of LURP to adopt strategies for achieving a sustainable state of Lake Urmia based on a more realistic outlook.     

Environmental Monitoring of Spatio-temporal Changes Using Remote Sensing and GIS in a Mediterranean Wetland of Northern Greece

Loss and degradation of terrestrial and aquatic habitats and degraded water quality are major environmental concerns worldwide. Especially wetlands are sensitive ecosystems that are subject to stress from human activities. Remote sensing techniques have been primarily used to generate information on land cover/use changes. Geographical Information Systems (GIS) and remote sensing can be used to provide a rapid or a large-scale understanding of lake change and in developing lake management strategies. The principal objectives of this study are to monitor and assess the spatial and temporal changes in land cover/use by using GIS, and to determine the main environmental factors affecting these changes. This paper presents a case study for the application of integrated remote sensing and GIS data for the classification and monitoring of the spatial and temporal changes in land use types. The study was conducted in a small natural wetland of Lake Cheimaditida, located in the East Mediterranean region of Northern Greece. Data analysis was conducted using GIS software. During the past several decades Lake Cheimaditida wetland has been influenced by many anthropogenic activities. The variables chosen for the assessment included condition of wetland and lake areas, present extent of wetlands relative to historic area, cover of natural habitat, wetland disturbances, etc. These variables address catchments properties that are important for maintaining and improving wetland habitats and water quality and assessment of trends useful for environmental monitoring. Land cover/land use patterns were assessed and compared using aerial photographs taken in 1945, 1969, 1982, and 1996. Over this period, reed beds enormously increased by 1,655.19%, while open-water areas and peat lands decreased by 74.05 and 99.5%, respectively. The significance of the changes in land cover distribution within the Lake Cheimaditida wetland are discussed in relation to the historical pattern of reed beds colonization, the importance of Phragmites australis in the process and the implications for strategic management of freshwater wetland resources.     

多线程在水泥回转窑旋风预热器远程监控系统中的应用

基于水泥回转窑旋风预热器远程监控系统的要求，应用多线程技术实现了旋风预热器整个运行过程中的数据采集处理、图像动态显示、数据库访问以及故障报警等多任务的同步运行，从而提高了整个系统的运行效率和速度。     

远程自动抄表系统在取水计量实时监控中的应用

当前,我国经济正处于快速增长期,用水量大幅度增长,水资源供需矛盾突出。文章以广西来宾市远程自动抄表系统在取水计量实时监控中的应用为例,从战略上分析了做好节水工作的重要性。     

基于K空间的核磁共振快速成像技术

磁共振成像技术已经成为现代临床医学影像检查的重要手段之一,而传统的成像手段的主要缺点是其成像速度太慢。文章主要阐述了半傅里叶成像、平行成像以及压缩传感成像的基本原理,从而展现MR快速成像技术巨大的应用价值和研究价值。     

流域水电站视频监控系统研究

基于苏只水电站工业电视系统设计，提出流域水电站集控中心实现视频监控系统的宏观设计思想，并讨论水电站前蹬设备的配置以及集控中心后置设备的配置。与现有的通信通道为视频监控系统地实现提供了良好的基础，提出在设计中应注意的一些问题。     

青藏高原水体特征遥感影像分析——以那曲地区为例

遥感技术是青藏高原水体资源研究的重要手段之一，各类型水体在不同的遥感影像中具有不同的特征。水体特征分析及其提取方法的确立是进行水体动态监测、洪涝灾害、水文参数设置等研究的前提。本文以西藏那曲地区为例．通过多源遥感影像中的水体特征分析，探索各类水体特征的解译提取方法。     

3S技术在库区移民中的应用

目前库区移民大多还是采用传统的调查统计方法,不仅耗费人力、物力和财力,且精度受到人为因素影响,这种方法明显不适合于现代移民工作的需要.地理信息系统、遥感和全球定位系统目前已广泛地应用于资源环境调查、灾害监测等多方面,技术成熟,影像分辨率越来越高,光谱越来越丰富,因此有必要将3S技术应用于库区工作中.论述了3S技术在库区移民工作,包括淹没实物指标调查、移民规划设计、灾害监测与调查、环境评价中的应用原理和方法,总结和回顾了目前国内在这方面所开展的工作,并建议尽早将这些技术应用于移民工作中.     

多媒体远程教学系统的设计与实现

基于Web的远程教学，仿行现行高校的模式，设立学生、教师、学校三级权限，实行网上教学。介绍了其功能和实现技术。     

Remote assessment of the condition of the metal and determination of causes of damage in elements of thermal power plant equipment

A branch system for on-line inspection of the condition of the metal of thermal power plant equipment with the use of modern telecommunications is described.Translated from Élektricheskie Stantsii, No. 9, September 2004, pp. 11 – 14.