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In marine atmospheric conditions, the morphologies and potential distributions of magnesium alloy were investigated underneath a droplet of 3% NaCl with microscopy and scanning Kelvin probe technique. Results showed that the deterioration process of Mg alloy could be divided into two stages unde a NaCl droplet. During the initial period, the cathodic reaction was mainly the reduction of H+. Subsequently,...
In order to research the change and distribution characters of heavy metals in the sediment of estuary, sediment grain size, Acid volatile sulfide (AVS) and simultaneously extracted metals(SEM, including Fe, Mn, Sr, Ba, Cr, V, and Co) were analyzed in three sediment short column cores collected form Licun estuary of Jiaozhou Bay. The sediment near the estuary is relative coarse (silty sand) compare...
Three steps chemical extraction method is applied to quantificationally analyze the reactive iron contents and pyrite contents in the sediments of NH-1 core from northern continental slope of South China Sea. Reactive iron content is 132~199μmol/g with an average value of 158.9μmol/g, and pyrite content is 14.3 ~ 147.6μmol/g with an average value of 84.82μmol/g. The pyrite content changes in a relative...
Preferential flow plays an important role in the movement of soil water. Dye tracer experiments and computer image analysis were used to analyze morphological and distribution of preferential flow paths under different land uses (forest land, shrubs land, and farmland). The relationships between the preferential flow paths and root lengths, root holes and root surface area were analyzed by Pearson...
Neural network height fitting method was one of the best methods at present. Neural network parameter, especially the network training function was one of the most important factors to affect the network performance and accuracy. This paper analyzed the relationship between several important neural network algorithms and their characteristics; Anglicizing and comparing speed and accuracy of each algorithm...
In the future Internet environment, GIService (Geographic Information Service) will be faced with high-performance serving requirements. Also, considering the different operating systems market share, we need the GIService to run in the cross-platform environment. This paper analyzed the importance of the scalability and cross-platform-ability on GIService. Through the process of middleware selection...
Burn scar identification is usually made in order to appraise injury degree of the forest after obtaining the fire spots. The most effective remote sensing methods for burn scar identification rely upon analysis of two MODIS near-infrared (NIR) channels centered near 1.24 and 2.13 um data. Due to burned-unburned separability and apparent reflectance of the two channels, the Global Environment Monitoring...
Estimates of forest vegetation carbon storage in subtropical China played an important role in researching climate dynamics and its mechanism. Carbon storage reflecting the effect of biomass and volume was developed for major planted forests (Pinus massoniana, Cunninghamia lanceolata) by means of the fifth FID (1994-1998) and assessing carbon density in three provinces (Hubei, Hunan, Anhui). Results...
This article describes a concise way to estimate litter decomposition rate in a regional scope; Meanwhile, we proposed a new method for evaluating the rate of single/mixed litter decomposition in a forest ecosystem.
The paper first outlines changing concept and expectations towards the university in the process of massification of higher education. The emergence of knowledge economy and the increased internationalization in the higher education sector is analysed. Under such circumstances, the university is expected to move away from being an ivory tower, and become more economically and socially relevant and...
A real-time data gathering design is introduced in this paper, which can be used in remote sensing system as seismic data acquisition system. Generally, this kind of system is designed as distributed formation. Data acquired remotely should be transferred to a storage device or analysis center continuously. With the growing of remote sensing scale, it is more difficult to gather data real-time. Data...
In this paper, coastline has been extracted from remote sensing image using the supervised classification method through the research of remote sensing image features. The coastline extraction can be very accurate when the seawater features are obviously consistent in image. For the calm sea image, the coastline can be extracted accurately based on supervised classification. But for the images that...
Satellite remote sensing has been an important method of marine monitoring. In this paper, according to the requirements of marine monitoring and marine management, the authors produced figures to show the coastline changes, distributions of suspended sediment and chlorophyll-a based on the data from Landsat-5 and synchronous monitoring data of Yellow River's mouth and Laizhou Bay in different periods...
The density of absorbable particulate matter less than 10um termed as PM10 is one the most important contamination index for air quality monitoring. This article presented a new PM10 concentration analysis approach based on a quick atomospher correction (QUAC) model and support vector machines reggression (SVR). The deriviation of six MODIS bands before and after QUAC model is calculated as indicating...
Metro Traffic is an important component of urban public transport part. With large number of urban subway construction, subway tunnels surrounding groundwater, soil damage to the environment has become very prominent in subway construction problems. The changes in water and soil caused by subway construction will inevitably lead to changes in the environment surrounding the MTR changes in living environment...
Embedded system is always power-sensitive for its time-limited power-providing system. As a popular real time operating system used under embedded system, Vxworks provides a feasible way to achieve low power dissipation with its kernel scheduler and hook mechanism. This paper firstly gived the principle and implemention of the Low-power design under Vxworks, and then verified the feasibility of the...
It has comes to be the center stage that how to take advantage of Spatial information to reduce the cost of logistic and improve the efficiency. Based on Web Processing Service Specification, multipartite logistics information and services are integrated, the WPS-based third logistics geospatial information service pattern is built, a solution to different logistics is proposed that can help them...
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