Visual Analysis for Civil Aviation Passenger Reservation Data Characteristics Based on Uncertainty Measurement

Aviation data analysis can help airlines to understand passenger needs,so as to provide passengers with more sophisticated and better services.How to explore the implicit message and analyze contained features from large amounts of data has become an important issue in the civil aviation passenger data analysis process.The uncertainty analysis and visualization methods of data record and property measurement are offered in this paper,based on the visual analysis and uncertainty measure theory combined with parallel coordinates,radar chart,histogram,pixel chart and good interaction.At the same time,the data source expression clearly shows the uncertainty and hidden information as an information base for passengers’service

Data Covariance Learning in Aesthetic Attributes Assessment

Image Aesthetic Assessment (IAA) is a widely considered problem given its usefulness in a wide range of applications such as the evaluation image capture pipelines, sharing and storage techniques media, but the intrinsic mechanism of aesthetic evaluation is seldom been explored due to its subjective nature and the lack of interpretability of deep neural networks. Noticing that the photographic style annotations of images (i.e. the score of aesthetic attributes) are more objective and interpretable compared with the Mean Opinion Scores (MOS) annotations for IAA, we evaluate the problem of Aesthetic Attributes Assessment (AAA) as to provide complementary information for IAA. We firstly introduce the learning of data covariance in the field of Aesthetic Attributes Assessment and propose a regression model that jointly learns from MOS as well as the score of all aesthetic attributes at the same time. We construct our method by extending the scheme of data uncertainty learning and propose data covariance learning. Our method achieves the state-of-the-art performance on AAA without architectural design that trains in a totally end-to-end manner and can be easily extended to existing IAA methods.

Fuzzy norm method for evaluating random vibration of airborne platform from limited PSD data

For random vibration of airborne platform, the accurate evaluation is a key indicator to ensure normal operation of airborne equipment in flight. However, only limited power spectral density（PSD） data can be obtained at the stage of flight test. Thus, those conventional evaluation methods cannot be employed when the distribution characteristics and priori information are unknown. In this paper, the fuzzy norm method（FNM） is proposed which combines the advantages of fuzzy theory and norm theory. The proposed method can deeply dig system information from limited data, which probability distribution is not taken into account. Firstly, the FNM is employed to evaluate variable interval and expanded uncertainty from limited PSD data, and the performance of FNM is demonstrated by confidence level, reliability and computing accuracy of expanded uncertainty. In addition, the optimal fuzzy parameters are discussed to meet the requirements of aviation standards and metrological practice. Finally, computer simulation is used to prove the adaptability of FNM. Compared with statistical methods, FNM has superiority for evaluating expanded uncertainty from limited data. The results show that the reliability of calculation and evaluation is superior to 95%.