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In the study of gas-liquid two-phase flow and heat transfer of evaporative cooling generator, has important significance to test the accuracy of void ratio. This paper first introduces the principle of ray testing, should pay attention to the selection of γ-ray source. The ray test two-phase flow void ratio of the experimental platform is established. The test data and drift model, one-dimensional...
The objective of this paper is to investigate how strong the axial magnetic field (AMF) is needed for a 126kV vacuum interrupter at different contact gaps. The AMF was generated by a pair of 2/3 coil AMF contacts. First, the accuracy of the three-dimensional finite element simulation of AMF was validated by an AMF measurement at contact gap 30mm. After that high-current switching experiments with...
Preference restraint cone data envelopment analysis model is recommended and extended to interval number case. A mew model for project selecting has been established based on preference restraint cone data envelopment analysis model and interval data envelopment analysis. The approach is illustrated by an example. It is shown that the introduced model is convenient for integrates decision-maker's...
The quality of Software product is crucial, the research of software quality evaluation method, has always been a research hotspot in the area of software, this paper analyzed and studied problems and shortcomings of the existing fuzzy comprehensive evaluation algorithm model, and improved the original fuzzy comprehensive evaluation model in the software evaluation process, and from angle of the fuzzy...
To make accurate appraisal of the competitiveness of construction enterprises, DEA model is adopted and extended. The integrated competitiveness and state of returns to scale were analyzed. The inefficient DMUs were diagnosed and optimized by changing the index and using projection analysis and the efficient DMUs were discriminated by super efficiency and sensitivity analysis. Then, forecast about...
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