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Type :thesis
Subject :QA Mathematics
Main Author :Munirah Bahari
Title :Pembinaan model peramalan siri masa suhu di Malaysia melalui pendekatan kalut
Place of Production :Tanjong Malim
Publisher :Fakulti Sains dan Matematik
Year of Publication :2021
Corporate Name :Universiti Pendidikan Sultan Idris
PDF Guest :Click to view PDF file
PDF Full Text :The author has requested the full text of this item to be restricted.

Abstract : Universiti Pendidikan Sultan Idris
Kajian ini bertujuan membina model peramalan siri masa suhu di Malaysia yang dicerap   mengikut jam di Pulau Pinang, Johor, Melaka, Pahang, Perak dan Selangor menggunakan   pendekatan kalut. Secara spesifik, objektif utama kajian adalah untuk mengesan kehadiran   dinamik kalut, meramal siri masa suhu dan mengenal pasti pengaruh bilangan data terhadap   prestasi peramalan. Kaedah Cao dan plot ruang fasa digunakan dalam mengesan kehadiran   dinamik kalut. Dua langkah terlibat dalam meramal suhu iaitu pembinaan semula ruang fasa   dan proses peramalan. Sebelum melakukan peramalan, dua parameter perlu ditentukan iaitu   masa tunda, r dan matra pembenaman, m. Parameter r ditentukan melalui kaedah purata   maklumat bersama dan penetapan r =1. Parameter m dikira berdasarkan nilai E1(m) daripada   kaedah Cao. Tiga kaedah digunakan untuk pembinaan model peramalan iaitu kaedah   penghampiran purata setempat, kaedah penghampiran linear setempat dan kaedah   penambahbaikan penghampiran linear setempat. Bilangan data siri masa divariasikan untuk   mengenal pasti pengaruh bilangan data terhadap prestasi peramalan. Melalui kaedah Cao dan   plot ruang fasa, keputusan menunjukkan kehadiran dinamik kalut dalam siri masa   yang dikaji. Keputusan peramalan adalah cemerlang dengan nilai pekali kolerasi (pk)   menghampiri satu dan peramalan melalui model kalut adalah lebih baik berbanding model   tradisional regresi linear. Seterusnya, bilangan data tidak mempengaruhi nilai pk peramalan.   Secara kesimpulan, pendekatan kalut dapat diaplikasikan ke atas siri masa suhu di Malaysia.   Implikasinya, adalah diharapkan kajian ini dapat membantu Jabatan Meteorologi Malaysia   dan Jabatan Alam Sekitar dalam pengurusan peramalan perubahan suhu yang lebih baik di   Malaysia.

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