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As the strain sensing element of a structural health monitoring, the study and the application of the fibre-optic bragg grating (FBG) have been widely accepted.
      
Health diagnoses of ecosystems subject to a typical erosion environment in Zhifanggou watershed, north-west China
      
Ecosystem health is the object of water and soil conservation and ecological building in loess hilly areas under erosion environment.
      
Using principles of ecosystem health quantitative assessment and diagnosis index selection, 17 factors were considered from three aspects: resource and environmental capacity, social and economic impact, and ecological services.
      
An evaluation index system on ecosystem health was established for a small watershed under erosion conditions.
      
Mean-square deviation was employed to determine the weight of each factor and then step-up multilayer synthesis with linear weighting function was used to build a two-level hierarchy and collection index health consultation model.
      
The health dynamics of the ecosystem in the small watershed under erosion conditions was analyzed.
      
Results show that the watershed ecosystem is relatively stable and has an increasing annual fluctuation (0.370 in 1985 to 0.573 in 2003) for the health index.
      
At the same time, obstacles and advantages to the watershed ecosystem health were studied by introducing the concepts of obstacle degree and advantage, and path analysis method, considering the real economic optimal level as the uppermost goal.
      
Based on the data collected from 31 plots and 93 soil samples, the state of health of the forest ecosystem is discussed and the appropriate FHA age has been determined.
      
Furthermore, air bubbles flowing out of the pump will hinder its application in areas such as medical treatment and health care where blood transfusion and infusion are concerned.
      
Ecosystem health assessment on the hill and gully area of loess Plateau in Inner Mongolia, China
      
Maintenance of ecosystem health is the primary focus of a sound ecological restoration.
      
Yet methods involved in quantifying and assessing the health level remain a challenge to the ecological community.
      
We applied the AMIS for all three landscapes by categorizing each ecosystem into five health levels.
      
We found that the health index for reconstructed vegetation were at levels of IV, II, IV, and III, while those of degraded vegetation were ranked at V, IV, V, and IV.
      
Overall, the comprehensive ecosystem health index of reconstructed vegetation was lower than that of intact vegetation but higher than that of degraded vegetation.
      
The health index for reconstructed vegetation was at level III, and that of degraded vegetation was still at level IV.
      
The contributing values were: organization structure >amp;gt; soil health >amp;gt; vigor >amp;gt; service function.
      
Pollution of agricultural land by heavy metals has imposed an increasingly serious risk to environmental and human health in recent years.
      
 

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