This article looks at a didactic experience at the undergraduate level in civil engineering, specifically, teaching a mathematics course through smartphones. The objective was to teach a course of an engineering degre...This article looks at a didactic experience at the undergraduate level in civil engineering, specifically, teaching a mathematics course through smartphones. The objective was to teach a course of an engineering degree primarily using this technology, in order to promote among the students their skills and competencies to develop and present a theme. It should be mentioned that every student in this case study used his/her knowledge at unusual hours, that is, 1<span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a.m. or 2</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a.m., sharing their work with me or asking me for academic help to solve a specific problem. This adaptation process in teaching practice is not easy and may not be achieved in a short period of time. The principal idea to highlight is that planning activities with new technologies cannot be carried out spontaneously and must be based on an educational model. Another important thing in this type of courses is the assessment of the teacher, priority of education administrators. Based on a questionnaire distributed to the students upon conclusion of the course, a statistic and probabilities analysis was carried out, showing surprising results regarding the questions—Did you like the course? What did you not like about the course? And What would you change about the course?</span></span></span>展开更多
The chirplet transform is the generalization form of fast Fourier transform , short-time Fourier transform, and wavelet transform. It has the most flexible time frequency window and successfully used in practices. How...The chirplet transform is the generalization form of fast Fourier transform , short-time Fourier transform, and wavelet transform. It has the most flexible time frequency window and successfully used in practices. However, the chirplet transform has not inherent inverse transform, and can not overcome the signal reconstructing problem. In this paper, we proposed the improved chirplet transform (ICT) and constructed the inverse ICT. Finally, by simulating the harmonic voltages, The power of the improved chirplet transform are illustrated for harmonic detection. The contours clearly showed the harmonic occurrence time and harmonic duration.展开更多
文摘This article looks at a didactic experience at the undergraduate level in civil engineering, specifically, teaching a mathematics course through smartphones. The objective was to teach a course of an engineering degree primarily using this technology, in order to promote among the students their skills and competencies to develop and present a theme. It should be mentioned that every student in this case study used his/her knowledge at unusual hours, that is, 1<span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a.m. or 2</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a.m., sharing their work with me or asking me for academic help to solve a specific problem. This adaptation process in teaching practice is not easy and may not be achieved in a short period of time. The principal idea to highlight is that planning activities with new technologies cannot be carried out spontaneously and must be based on an educational model. Another important thing in this type of courses is the assessment of the teacher, priority of education administrators. Based on a questionnaire distributed to the students upon conclusion of the course, a statistic and probabilities analysis was carried out, showing surprising results regarding the questions—Did you like the course? What did you not like about the course? And What would you change about the course?</span></span></span>
文摘The chirplet transform is the generalization form of fast Fourier transform , short-time Fourier transform, and wavelet transform. It has the most flexible time frequency window and successfully used in practices. However, the chirplet transform has not inherent inverse transform, and can not overcome the signal reconstructing problem. In this paper, we proposed the improved chirplet transform (ICT) and constructed the inverse ICT. Finally, by simulating the harmonic voltages, The power of the improved chirplet transform are illustrated for harmonic detection. The contours clearly showed the harmonic occurrence time and harmonic duration.
