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The insulating paper in the transformer undergoes degradation during operation. Condition monitoring and assessment for insulating paper is of great significance as the life of insulating paper mainly determines that of transformers. Accelerated thermal aging experiments were performed for insulating papers at 120 °C and 130 °C, respectively. The crystallinity index of insulating paper was calculated...
Understanding the behaviors of a software system is very important for performing daily system maintenance tasks. In practice, one way to gain knowledge about the runtime behavior of a system is to manually analyze system logs collected during the system executions. With the increasing scale and complexity of software systems, it has become challenging for system operators to manually analyze system...
Existing drought evaluation method which people easy to appear the interference of artificial weights, this paper puts forward projection pursuit model for evaluating drought based on logistic curve and selects the drought evaluation index as projection parameters to seek its best projection direction. Taking Qiqihar area as research objects, the departure ratio of rain-fall, dry index and Z index...
Attribute mathematics is a new mathematics branch based on the basic concepts of attribute set and attributes measurement, and the model established on the theory can recognize things effectively. Through concisely presenting the basic concepts and theory of attribute mathematics, we put emphasis on the modeling idea and method of attribute recognition model. An example about water quality evaluation...
Aiming at project investment decision-making issue, fuzzy comprehensive evaluation model was used to solve fuzziness in investment decision-making. Entropy weight method was applied to calculate weights of the influencing factors of investment decision-making, which avoided the subjective interference of fuzzy method in valuing weight matrix. Water saving irrigation project investment decision-making...
The research of groundwater vulnerability is the basic work to protect the groundwater. For sustainable utilizing groundwater resource, evaluating groundwater vulnerability is necessary .Useful reference to protecting, exploiting and utilizing groundwater resource are provided rationally. Three methods are applied to evaluating the groundwater vulnerability in Sanjiang Plain. They are the entropy...
This paper establishes evaluation model of carrying capacity of regional groundwater resources by method of matter-element analysis, and by this method, it carries on the comprehensive evaluation to carrying capacity of regional groundwater resources in Gannan. According to the evaluation result, carrying capacity of groundwater resources in Ganna test area belongs to the degree of I, which means...
To solve the descent of groundwater level in Sanjiang Plain, taking Hongxinglong branch of Heilongjiang Land Reclamation bureau as an example, the water resources carrying capacity of 12 farms in the area were evaluated by set pair analysis technology. The results indicated that the water resources carrying capacity of 291 and Jiangchuan farms were in grade III, Raohe farm between grade II and III,...
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