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This paper explores on principles and methods for teaching DSP, adopting project-based approach. The practicality and applicability of the curriculum are highlighted by optimizing teaching contents. Besides, classroom teaching is reformed by integrating the teaching of theories and the experiment, dividing the class into groups, and appropriately flipping the classroom to improve students' learning...
Polyacrylonitrile (PAN) fibers were hydrolyzed in an alkaline condition, and the hydrolysis process was observed with a self-made visual device. Under the condition of mass ratio of PAN to NaOH to H2O being 1:0.6:100, the sample was collected every 1 h and used for observation. It could be seen from the pictures obtained, the entire fiber surface was rough bark-like when they were hydrolyzed for 3...
The traffic matrix is one of the crucial inputs in many traffic engineering and network planning tasks, but it is usually impossible to directly measure traffic matrices. So, it is an important research topic to infer traffic matrix by reasonably modeling, and incorporating the limited empirical information. Of the proposed methods, Kalman Filtering method is a more efficient and accurate method than...
Based on the further analysis of typical failure modes and influences of tap-changers in power transformer, the fault-tree of tap-changers is set up by using fault-tree analysis(FTA) techniques and the assessment method for the reliability of tap-changers, combined with the index of the importance and the method of Improved Analytic Hierarchy Process(IAHP), is put forward. The assessment examples...
Transformer is the key equipment of transforming voltage and exchanging power in the power system. It's safe and reliable operation directly influences the safe level of the power system. The risk assessment of transformer is very significant to improve the reliability of the power system. A fuzzy comprehensive risk assessment model of transformer based on Borda number theory is proposed in this paper...
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