遥感技术在黑竹沟风景旅游资源调查分类与评价中的应用

随着信息技术的发展,遥感成为了旅游资源调查评价的新手段。阐述了运用遥感新技术对四川省乐山市黑竹沟风景旅游区旅游资源进行调查的过程,并结合现场调研和相关资料对其旅游资源进行了分类和评价。首先对黑竹沟风景旅游区2003年的ETM影像数据遥感图像进行了处理,然后建立了解译标志进行旅游资源信息的提取和分析,最后对黑竹沟风景旅游区的旅游资源进行了客观全面的分类和评价。黑竹沟的旅游资源可分为2大类、7亚类、21个基本类型,是一处景源内容丰富、景象多变的旅游区,发展潜力巨大。

氧化沟工艺在污水处理中的应用研究进展

氧化沟工艺污水处理厂自传入中国以来,迅速地发展到全国中小城市以及各个领域,其重要性是不言而喻的。本文对氧化沟的技术、特征、应用、不足进行全方位分析,并且对其应用进展进行了研究。

青年上网“机会均等化”及“隐藏的不平等”

青年数字鸿沟问题随着移动互联网时代的到来呈现出新的趋势:“机会均等化”及“隐藏的不平等”。为此,政府应树立明确的问题意识,做好高校政策引导,合理调配公共资源,鼓励媒体、学校、家庭多方参与,多管齐下,应对青年数字鸿沟问题的新变化。

The Development of a Geographic Information System(GIS) Database for Jiuzhaigou National Nature Reserve and Its Application

The objective of this paper is to develop a GIS(Geographic Information System) database for Jiuzhaigou National Nature Reserve(Jiuzhaigou,hereafter) in China and demonstrate its application as a research tool.A cost-effective procedure was developed to compile a variety of geographical and biological data of the study area in terms of popular GIS format such as shape files.These files were further calibrated and validated using field surveys data.The developed GIS database was used to quantify the distributions of the wildlife(amphibians,mammals,and birds) using the distances of the wildlife to the centerline of the bus-tour routes.The Pearson correlation coefficient was used to quantify the correlation in space between pairs of different wildlife using the number of habitats for given space contexts.An ArcObject-based macro was developed to perform the analysis.The results showed the majority of the habitats of wildlife are located in the proximity of the tour-bus routes with an average distance ranging from 564 to 894 m depending on types of wildlife.This indicates a possibility of the disturbance to the wildlife by human activities.The correlation coefficient of the wildlife ranged from 0.36 to 0.64 depending on pairs of wildlife,indicating some correlations in space.However,due to the limited sample size,the statistical significances need to be further investigated.This paper has successfully demonstrated the use of the GIS-based database as a research tool for environmental study.

The Search for Indicators of ICT： Preliminary Study on Industrial Enterprises of Cordoba and Rosario

In this paper, the incorporation and use of ICT （Information and Communication Technologies） in organizations are recognized as a process that occurs in stages involving progressive levels of maturity towards the integration of the extended value chain. In the beginning, ICT are applied to the digitalization of tasks and processes within the organization that facilitates the transition to the stage of integration of information systems and internal communication. Once this level of maturity is reached, it is possible to extend the application oflCT in inter-organizational processes. The main objective of this work is to identify factors that encourage the integration of inter-organizational information systems and the development of the extended value chain. One of the difficulties that this kind of study has to face is on the lack of precise empirical tools that enable comparability of results, both in time and between sectors and countries. It is therefore necessary to perform specific works that shed light on whether the efforts of local organizations to integrate ICT enhance collaborative processes with the environment and the factors influencing these results. It was applied a mixed methodology that combines ad-hoc survey and Tool Assessment Websites, carried out on 23 industrial manufacturing companies located in Rosario and Cordoba Argentina. The search was oriented to the identification of a limited number of indicators, but with the advantage of being amenable to being followed in time, for a number of companies in the region under study. The results indicate that companies with customers and/or suppliers abroad denote a higher level of maturity in the application of ICT.

Soil Erosion as Affected by Polyacrylamide Application Under Simulated Furrow Irrigation with Saline Water

The reduction of soil and water losses under furrow irrigation with saline water is important to environmental protection and agricultural production. The objective of this study was to determine the effect of polyacrylamide (PAM) application on soil infiltration and erosion under simulated furrow irrigation with saline water. Polyacrylamide was applied by dissolving it in irrigation water at the rates of 1.5, 7.5, and 15.0 mg L-1 or spreading it as a powder on soil surface at the rates of 0.3, 1.5, 3.0, and 6.0 g m-2, respectively. The electrolyte concentration of tested irrigation water was 10 and 30 mmolc L-1 and its sodium adsorption ratio (SAR) was 0.5, 10.0, and 20.0 (mmolc L-1)0.5. Distilled water was used as a control for irrigation water quality. Results indicated that the electrolyte concentration and SAR generally did not significantly affect soil and water losses after PAM application. Infiltration rate and total infiltration volume decreased with the increase of PAM application rate. Polyacrylamide application in both methods significantly reduced soil erosion, but PAM application rate did not significantly affect it. The solution PAM application was more effective in controlling soil erosion than the powdered PAM application, but the former exerted a greater adverse influence on soil infiltration than the latter. Under the same total amounts, the powdered PAM application resulted in a 38.2%-139.6% greater infiltration volume but a soil mass loss of 1.3-3.4 times greater than the solution PAM application.