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If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
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All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Principal component analysis (PCA) and nonlinear principal component analysis (NLPCA) are used to detect ionospheric anomalies. The ionospheric anomalies related to Haiti earthquake on 12 January 2010 are researched by PCA in Chapter 1. The ionospheric anomalies related to Taiwan ChiChi earthquake on 21 September 1999 are researched by NLPCA in Chapter 2. The ionospheric anomalies related to Japan Tohoku earthquake on 11 March 2011 are researched by PCA and image processing in Chapter 3.
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