scholarly journals PERAMALAN ARUS LALU LINTAS BERDASARKAN WAKTU TEMPUH DAN CUACA MENGGUNAKAN METODE TIME SERIES DECOMPOSITION

2021 ◽  
Vol 3 (2) ◽  
pp. 207-215
Author(s):  
Muhammad Hudzaifah ◽  
Ali Akbar Rismayadi

Prediksi lalu lintas telah menjadi tren topik penelitian untuk pengembangan transportasi cerdas. Permasalahan lalu lintas pada setiap negara khususnya negara berkembang permasalahan masyarakat umum yang terjadi yaitu tidak dapat memprediksi kondisi lalu lintas di masa yang akan datang. Kondisi lalu lintas pada waktu tertentu berbeda dengan kondisi lalu lintas pada saat yang berbeda karena kebiasaan masyarakat yang berbeda pada setiap waktunya. Kondisi lalu lintas juga dipengaruhi oleh kondisi cuaca pada saat itu. Dengan mengolah data arus lalu lintas yang dijadikan faktor untuk menganalisa kondisi lalu lintas. Prediksi lalu lintas yang akurat dan efektif akan memberikan informasi arus lalu lintas sesuai kepada pengguna jalan dan efektif dalam memecahkan kepadatan arus lalu lintas. Pada penelitian ini penulis mengusulkan metode Time Series decomposition guna melakukan prediksi lalu lintas. Metode time series decomposition adalah metode peramalan dengan menggunakan analisa pola hubungan antara variable yang akan diperkirakan dengan variable waktu. Secara umum time series mengalisa 4 pola data yaitu pola trend, seasonal, pola horizontal dan pola siklis. Data yang hitung pada penelitian yaitu data waktu tempuh perjalan dan kondisi cuaca. Metode prediksi time series decomposition diterapkan pada pada aplikasi mobile berbasis android agar pengguna dapat mengetahui informasi prediksi melalui smartphone. Hasil dari penelitian ini menghasilkan prediksi dengan nilai error RMSE sebesar 3.80%. Hasil tersebut membuktikan bahwa metode time series decomposition dapat digunakan untuk membantu prediksi lalu lintas.

2021 ◽  
Vol 5 (1) ◽  
pp. 26
Author(s):  
Karlis Gutans

The world changes at incredible speed. Global warming and enormous money printing are two examples, which do not affect every one of us equally. “Where and when to spend the vacation?”; “In what currency to store the money?” are just a few questions that might get asked more frequently. Knowledge gained from freely available temperature data and currency exchange rates can provide better advice. Classical time series decomposition discovers trend and seasonality patterns in data. I propose to visualize trend and seasonality data in one chart. Furthermore, I developed a calendar adjustment method to obtain weekly trend and seasonality data and display them in the chart.


2019 ◽  
Vol 9 (4) ◽  
pp. 777 ◽  
Author(s):  
Gaoyuan Pan ◽  
Shunming Li ◽  
Yanqi Zhu

Traditional correlation analysis is analyzed separately in the time domain or the frequency domain, which cannot reflect the time-varying and frequency-varying characteristics of non-stationary signals. Therefore, a time–frequency (TF) correlation analysis method of time series decomposition (TD) derived from synchrosqueezed S transform (SSST) is proposed in this paper. First, the two-dimensional time–frequency matrices of the signals is obtained by synchrosqueezed S transform. Second, time series decomposition is used to transform the matrices into the two-dimensional time–time matrices. Third, a correlation analysis of the local time characteristics is carried out, thus attaining the time–frequency correlation between the signals. Finally, the proposed method is validated by stationary and non-stationary signals simulation and is compared with the traditional correlation analysis method. The simulation results show that the traditional method can obtain the overall correlation between the signals but cannot reflect the local time and frequency correlations. In particular, the correlations of non-stationary signals cannot be accurately identified. The proposed method not only obtains the overall correlations between the signals, but can also accurately identifies the correlations between non-stationary signals, thus showing the time-varying and frequency-varying correlation characteristics. The proposed method is applied to the acoustic signal processing of an engine–gearbox test bench. The results show that the proposed method can effectively identify the time–frequency correlation between the signals.


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